From 6ac053bbaadc30f1313bbbf1db25667e273d4ce8 Mon Sep 17 00:00:00 2001 From: cx384 Date: Sun, 17 Mar 2024 14:09:25 +0100 Subject: [PATCH] Extract image generation/cache from texturesource.cpp --- src/client/CMakeLists.txt | 1 + src/client/imagesource.cpp | 1975 ++++++++++++++++++++++++++++++++++ src/client/imagesource.h | 84 ++ src/client/texturesource.cpp | 1961 +-------------------------------- 4 files changed, 2069 insertions(+), 1952 deletions(-) create mode 100644 src/client/imagesource.cpp create mode 100644 src/client/imagesource.h diff --git a/src/client/CMakeLists.txt b/src/client/CMakeLists.txt index f2aa511b7..d451d0911 100644 --- a/src/client/CMakeLists.txt +++ b/src/client/CMakeLists.txt @@ -69,6 +69,7 @@ set(client_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/tile.cpp ${CMAKE_CURRENT_SOURCE_DIR}/texturepaths.cpp ${CMAKE_CURRENT_SOURCE_DIR}/texturesource.cpp + ${CMAKE_CURRENT_SOURCE_DIR}/imagesource.cpp ${CMAKE_CURRENT_SOURCE_DIR}/wieldmesh.cpp ${CMAKE_CURRENT_SOURCE_DIR}/shadows/dynamicshadows.cpp ${CMAKE_CURRENT_SOURCE_DIR}/shadows/dynamicshadowsrender.cpp diff --git a/src/client/imagesource.cpp b/src/client/imagesource.cpp new file mode 100644 index 000000000..92da3ee27 --- /dev/null +++ b/src/client/imagesource.cpp @@ -0,0 +1,1975 @@ +/* +Minetest +Copyright (C) 2010-2013 celeron55, Perttu Ahola + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU Lesser General Public License as published by +the Free Software Foundation; either version 2.1 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along +with this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "imagesource.h" + +#include +#include "settings.h" +#include "mesh.h" +#include "util/strfnd.h" +#include "renderingengine.h" +#include "util/base64.h" +#include "irrlicht_changes/printing.h" +#include "imagefilters.h" +#include "texturepaths.h" +#include "util/numeric.h" + + +//////////////////////////////// +// SourceImageCache Functions // +//////////////////////////////// + +SourceImageCache::~SourceImageCache() { + for (auto &m_image : m_images) { + m_image.second->drop(); + } + m_images.clear(); +} + +void SourceImageCache::insert(const std::string &name, video::IImage *img, bool prefer_local) +{ + assert(img); // Pre-condition + // Remove old image + std::map::iterator n; + n = m_images.find(name); + if (n != m_images.end()){ + if (n->second) + n->second->drop(); + } + + video::IImage* toadd = img; + bool need_to_grab = true; + + // Try to use local texture instead if asked to + if (prefer_local) { + bool is_base_pack; + std::string path = getTexturePath(name, &is_base_pack); + // Ignore base pack + if (!path.empty() && !is_base_pack) { + video::IImage *img2 = RenderingEngine::get_video_driver()-> + createImageFromFile(path.c_str()); + if (img2){ + toadd = img2; + need_to_grab = false; + } + } + } + + if (need_to_grab) + toadd->grab(); + m_images[name] = toadd; +} +video::IImage* SourceImageCache::get(const std::string &name) +{ + std::map::iterator n; + n = m_images.find(name); + if (n != m_images.end()) + return n->second; + return NULL; +} + +// Primarily fetches from cache, secondarily tries to read from filesystem +video::IImage* SourceImageCache::getOrLoad(const std::string &name) +{ + std::map::iterator n; + n = m_images.find(name); + if (n != m_images.end()){ + n->second->grab(); // Grab for caller + return n->second; + } + video::IVideoDriver *driver = RenderingEngine::get_video_driver(); + std::string path = getTexturePath(name); + if (path.empty()) { + infostream<<"SourceImageCache::getOrLoad(): No path found for \"" + <createImageFromFile(path.c_str()); + + if (img){ + m_images[name] = img; + img->grab(); // Grab for caller + } + return img; +} + + +//////////////////////////// +// Image Helper Functions // +//////////////////////////// + + +/** Draw an image on top of another one with gamma-incorrect alpha compositing + * + * This exists because IImage::copyToWithAlpha() doesn't seem to always work. + * + * \tparam overlay If enabled, only modify pixels in dst which are fully opaque. + * Defaults to false. + * \param src Top image. This image must have the ECF_A8R8G8B8 color format. + * \param dst Bottom image. + * The top image is drawn onto this base image in-place. + * \param dst_pos An offset vector to move src before drawing it onto dst + * \param size Size limit of the copied area +*/ +template +static void blit_with_alpha(video::IImage *src, video::IImage *dst, + v2s32 dst_pos, v2u32 size); + +// Apply a color to an image. Uses an int (0-255) to calculate the ratio. +// If the ratio is 255 or -1 and keep_alpha is true, then it multiples the +// color alpha with the destination alpha. +// Otherwise, any pixels that are not fully transparent get the color alpha. +static void apply_colorize(video::IImage *dst, v2u32 dst_pos, v2u32 size, + const video::SColor color, int ratio, bool keep_alpha); + +// paint a texture using the given color +static void apply_multiplication(video::IImage *dst, v2u32 dst_pos, v2u32 size, + const video::SColor color); + +// Perform a Screen blend with the given color. The opposite effect of a +// Multiply blend. +static void apply_screen(video::IImage *dst, v2u32 dst_pos, v2u32 size, + const video::SColor color); + +// Adjust the hue, saturation, and lightness of destination. Like +// "Hue-Saturation" in GIMP. +// If colorize is true then the image will be converted to a grayscale +// image as though seen through a colored glass, like "Colorize" in GIMP. +static void apply_hue_saturation(video::IImage *dst, v2u32 dst_pos, v2u32 size, + s32 hue, s32 saturation, s32 lightness, bool colorize); + +// Apply an overlay blend to an images. +// Overlay blend combines Multiply and Screen blend modes.The parts of the top +// layer where the base layer is light become lighter, the parts where the base +// layer is dark become darker.Areas where the base layer are mid grey are +// unaffected.An overlay with the same picture looks like an S - curve. +static void apply_overlay(video::IImage *overlay, video::IImage *dst, + v2s32 overlay_pos, v2s32 dst_pos, v2u32 size, bool hardlight); + +// Adjust the brightness and contrast of the base image. Conceptually like +// "Brightness-Contrast" in GIMP but allowing brightness to be wound all the +// way up to white or down to black. +static void apply_brightness_contrast(video::IImage *dst, v2u32 dst_pos, v2u32 size, + s32 brightness, s32 contrast); + +// Apply a mask to an image +static void apply_mask(video::IImage *mask, video::IImage *dst, + v2s32 mask_pos, v2s32 dst_pos, v2u32 size); + +// Draw or overlay a crack +static void draw_crack(video::IImage *crack, video::IImage *dst, + bool use_overlay, s32 frame_count, s32 progression, + video::IVideoDriver *driver, u8 tiles = 1); + +// Brighten image +void brighten(video::IImage *image); +// Parse a transform name +u32 parseImageTransform(std::string_view s); +// Apply transform to image dimension +core::dimension2d imageTransformDimension(u32 transform, core::dimension2d dim); +// Apply transform to image data +void imageTransform(u32 transform, video::IImage *src, video::IImage *dst); + +inline static void applyShadeFactor(video::SColor &color, u32 factor) +{ + u32 f = core::clamp(factor, 0, 256); + color.setRed(color.getRed() * f / 256); + color.setGreen(color.getGreen() * f / 256); + color.setBlue(color.getBlue() * f / 256); +} + +static video::IImage *createInventoryCubeImage( + video::IImage *top, video::IImage *left, video::IImage *right) +{ + core::dimension2du size_top = top->getDimension(); + core::dimension2du size_left = left->getDimension(); + core::dimension2du size_right = right->getDimension(); + + u32 size = npot2(std::max({ + size_top.Width, size_top.Height, + size_left.Width, size_left.Height, + size_right.Width, size_right.Height, + })); + + // It must be divisible by 4, to let everything work correctly. + // But it is a power of 2, so being at least 4 is the same. + // And the resulting texture should't be too large as well. + size = core::clamp(size, 4, 64); + + // With such parameters, the cube fits exactly, touching each image line + // from `0` to `cube_size - 1`. (Note that division is exact here). + u32 cube_size = 9 * size; + u32 offset = size / 2; + + video::IVideoDriver *driver = RenderingEngine::get_video_driver(); + + auto lock_image = [size, driver] (video::IImage *&image) -> const u32 * { + image->grab(); + core::dimension2du dim = image->getDimension(); + video::ECOLOR_FORMAT format = image->getColorFormat(); + if (dim.Width != size || dim.Height != size || format != video::ECF_A8R8G8B8) { + video::IImage *scaled = driver->createImage(video::ECF_A8R8G8B8, {size, size}); + image->copyToScaling(scaled); + image->drop(); + image = scaled; + } + sanity_check(image->getPitch() == 4 * size); + return reinterpret_cast(image->getData()); + }; + auto free_image = [] (video::IImage *image) -> void { + image->drop(); + }; + + video::IImage *result = driver->createImage(video::ECF_A8R8G8B8, {cube_size, cube_size}); + sanity_check(result->getPitch() == 4 * cube_size); + result->fill(video::SColor(0x00000000u)); + u32 *target = reinterpret_cast(result->getData()); + + // Draws single cube face + // `shade_factor` is face brightness, in range [0.0, 1.0] + // (xu, xv, x1; yu, yv, y1) form coordinate transformation matrix + // `offsets` list pixels to be drawn for single source pixel + auto draw_image = [=] (video::IImage *image, float shade_factor, + s16 xu, s16 xv, s16 x1, + s16 yu, s16 yv, s16 y1, + std::initializer_list offsets) -> void { + u32 brightness = core::clamp(256 * shade_factor, 0, 256); + const u32 *source = lock_image(image); + for (u16 v = 0; v < size; v++) { + for (u16 u = 0; u < size; u++) { + video::SColor pixel(*source); + applyShadeFactor(pixel, brightness); + s16 x = xu * u + xv * v + x1; + s16 y = yu * u + yv * v + y1; + for (const auto &off : offsets) + target[(y + off.Y) * cube_size + (x + off.X) + offset] = pixel.color; + source++; + } + } + free_image(image); + }; + + draw_image(top, 1.000000f, + 4, -4, 4 * (size - 1), + 2, 2, 0, + { + {2, 0}, {3, 0}, {4, 0}, {5, 0}, + {0, 1}, {1, 1}, {2, 1}, {3, 1}, {4, 1}, {5, 1}, {6, 1}, {7, 1}, + {2, 2}, {3, 2}, {4, 2}, {5, 2}, + }); + + draw_image(left, 0.836660f, + 4, 0, 0, + 2, 5, 2 * size, + { + {0, 0}, {1, 0}, + {0, 1}, {1, 1}, {2, 1}, {3, 1}, + {0, 2}, {1, 2}, {2, 2}, {3, 2}, + {0, 3}, {1, 3}, {2, 3}, {3, 3}, + {0, 4}, {1, 4}, {2, 4}, {3, 4}, + {2, 5}, {3, 5}, + }); + + draw_image(right, 0.670820f, + 4, 0, 4 * size, + -2, 5, 4 * size - 2, + { + {2, 0}, {3, 0}, + {0, 1}, {1, 1}, {2, 1}, {3, 1}, + {0, 2}, {1, 2}, {2, 2}, {3, 2}, + {0, 3}, {1, 3}, {2, 3}, {3, 3}, + {0, 4}, {1, 4}, {2, 4}, {3, 4}, + {0, 5}, {1, 5}, + }); + + return result; +} + +static std::string unescape_string(const std::string &str, const char esc = '\\') +{ + std::string out; + size_t pos = 0, cpos; + out.reserve(str.size()); + while (1) { + cpos = str.find_first_of(esc, pos); + if (cpos == std::string::npos) { + out += str.substr(pos); + break; + } + out += str.substr(pos, cpos - pos) + str[cpos + 1]; + pos = cpos + 2; + } + return out; +} + +/* + Replaces the smaller of the two images with one upscaled to match the + dimensions of the other. + Ensure no other references to these images are being held, as one may + get dropped and switched with a new image. +*/ +void upscaleImagesToMatchLargest(video::IImage *& img1, + video::IImage *& img2) +{ + core::dimension2d dim1 = img1->getDimension(); + core::dimension2d dim2 = img2->getDimension(); + + if (dim1 == dim2) { + // image dimensions match, no scaling required + + } + else if (dim1.Width * dim1.Height < dim2.Width * dim2.Height) { + // Upscale img1 + video::IImage *scaled_image = RenderingEngine::get_video_driver()-> + createImage(video::ECF_A8R8G8B8, dim2); + img1->copyToScaling(scaled_image); + img1->drop(); + img1 = scaled_image; + + } else { + // Upscale img2 + video::IImage *scaled_image = RenderingEngine::get_video_driver()-> + createImage(video::ECF_A8R8G8B8, dim1); + img2->copyToScaling(scaled_image); + img2->drop(); + img2 = scaled_image; + } +} + +void blitBaseImage(video::IImage* &src, video::IImage* &dst) +{ + //infostream<<"Blitting "< dim_dst = dst->getDimension(); + // Position to copy the blitted to in the base image + core::position2d pos_to(0,0); + + blit_with_alpha(src, dst, pos_to, dim_dst); +} + + +namespace { + +/** Calculate the color of a single pixel drawn on top of another pixel without + * gamma correction + * + * The color mixing is a little more complicated than just + * video::SColor::getInterpolated because getInterpolated does not handle alpha + * correctly. + * For example, a pixel with alpha=64 drawn atop a pixel with alpha=128 should + * yield a pixel with alpha=160, while getInterpolated would yield alpha=96. + * + * \tparam overlay If enabled, only modify dst_col if it is fully opaque + * \param src_col Color of the top pixel + * \param dst_col Color of the bottom pixel. This color is modified in-place to + * store the result. +*/ +template +void blit_pixel(video::SColor src_col, video::SColor &dst_col) +{ + u8 dst_a = (u8)dst_col.getAlpha(); + if constexpr (overlay) { + if (dst_a != 255) + // The bottom pixel has transparency -> do nothing + return; + } + u8 src_a = (u8)src_col.getAlpha(); + if (src_a == 0) { + // A fully transparent pixel is on top -> do nothing + return; + } + if (src_a == 255 || dst_a == 0) { + // The top pixel is fully opaque or the bottom pixel is + // fully transparent -> replace the color + dst_col = src_col; + return; + } + struct Color { u8 r, g, b; }; + Color src{(u8)src_col.getRed(), (u8)src_col.getGreen(), + (u8)src_col.getBlue()}; + Color dst{(u8)dst_col.getRed(), (u8)dst_col.getGreen(), + (u8)dst_col.getBlue()}; + if (dst_a == 255) { + // A semi-transparent pixel is on top and an opaque one in + // the bottom -> lerp r, g, and b + dst.r = (dst.r * (255 - src_a) + src.r * src_a) / 255; + dst.g = (dst.g * (255 - src_a) + src.g * src_a) / 255; + dst.b = (dst.b * (255 - src_a) + src.b * src_a) / 255; + dst_col.set(255, dst.r, dst.g, dst.b); + return; + } + // A semi-transparent pixel is on top of a + // semi-transparent pixel -> general alpha compositing + u16 a_new_255 = src_a * 255 + (255 - src_a) * dst_a; + dst.r = (dst.r * (255 - src_a) * dst_a + src.r * src_a * 255) / a_new_255; + dst.g = (dst.g * (255 - src_a) * dst_a + src.g * src_a * 255) / a_new_255; + dst.b = (dst.b * (255 - src_a) * dst_a + src.b * src_a * 255) / a_new_255; + dst_a = (a_new_255 + 127) / 255; + dst_col.set(dst_a, dst.r, dst.g, dst.b); +} + +} // namespace +template +void blit_with_alpha(video::IImage *src, video::IImage *dst, v2s32 dst_pos, + v2u32 size) +{ + if (dst->getColorFormat() != video::ECF_A8R8G8B8) + throw BaseException("blit_with_alpha() supports only ECF_A8R8G8B8 " + "destination images."); + + core::dimension2d src_dim = src->getDimension(); + core::dimension2d dst_dim = dst->getDimension(); + bool drop_src = false; + if (src->getColorFormat() != video::ECF_A8R8G8B8) { + video::IVideoDriver *driver = RenderingEngine::get_video_driver(); + video::IImage *src_converted = driver->createImage(video::ECF_A8R8G8B8, + src_dim); + if (!src_converted) + throw BaseException("blit_with_alpha() failed to convert the " + "source image to ECF_A8R8G8B8."); + src->copyTo(src_converted); + src = src_converted; + drop_src = true; + } + video::SColor *pixels_src = + reinterpret_cast(src->getData()); + video::SColor *pixels_dst = + reinterpret_cast(dst->getData()); + // Limit y and x to the overlapping ranges + // s.t. the positions are all in bounds after offsetting. + u32 x_start = (u32)std::max(0, -dst_pos.X); + u32 y_start = (u32)std::max(0, -dst_pos.Y); + u32 x_end = (u32)std::min({size.X, src_dim.Width, + dst_dim.Width - (s64)dst_pos.X}); + u32 y_end = (u32)std::min({size.Y, src_dim.Height, + dst_dim.Height - (s64)dst_pos.Y}); + for (u32 y0 = y_start; y0 < y_end; ++y0) { + size_t i_src = y0 * src_dim.Width + x_start; + size_t i_dst = (dst_pos.Y + y0) * dst_dim.Width + dst_pos.X + x_start; + for (u32 x0 = x_start; x0 < x_end; ++x0) { + blit_pixel(pixels_src[i_src++], pixels_dst[i_dst++]); + } + } + if (drop_src) + src->drop(); +} + +/* + Apply color to destination, using a weighted interpolation blend +*/ +static void apply_colorize(video::IImage *dst, v2u32 dst_pos, v2u32 size, + const video::SColor color, int ratio, bool keep_alpha) +{ + u32 alpha = color.getAlpha(); + video::SColor dst_c; + if ((ratio == -1 && alpha == 255) || ratio == 255) { // full replacement of color + if (keep_alpha) { // replace the color with alpha = dest alpha * color alpha + dst_c = color; + for (u32 y = dst_pos.Y; y < dst_pos.Y + size.Y; y++) + for (u32 x = dst_pos.X; x < dst_pos.X + size.X; x++) { + u32 dst_alpha = dst->getPixel(x, y).getAlpha(); + if (dst_alpha > 0) { + dst_c.setAlpha(dst_alpha * alpha / 255); + dst->setPixel(x, y, dst_c); + } + } + } else { // replace the color including the alpha + for (u32 y = dst_pos.Y; y < dst_pos.Y + size.Y; y++) + for (u32 x = dst_pos.X; x < dst_pos.X + size.X; x++) + if (dst->getPixel(x, y).getAlpha() > 0) + dst->setPixel(x, y, color); + } + } else { // interpolate between the color and destination + float interp = (ratio == -1 ? color.getAlpha() / 255.0f : ratio / 255.0f); + for (u32 y = dst_pos.Y; y < dst_pos.Y + size.Y; y++) + for (u32 x = dst_pos.X; x < dst_pos.X + size.X; x++) { + dst_c = dst->getPixel(x, y); + if (dst_c.getAlpha() > 0) { + dst_c = color.getInterpolated(dst_c, interp); + dst->setPixel(x, y, dst_c); + } + } + } +} + +/* + Apply color to destination, using a Multiply blend mode +*/ +static void apply_multiplication(video::IImage *dst, v2u32 dst_pos, v2u32 size, + const video::SColor color) +{ + video::SColor dst_c; + + for (u32 y = dst_pos.Y; y < dst_pos.Y + size.Y; y++) + for (u32 x = dst_pos.X; x < dst_pos.X + size.X; x++) { + dst_c = dst->getPixel(x, y); + dst_c.set( + dst_c.getAlpha(), + (dst_c.getRed() * color.getRed()) / 255, + (dst_c.getGreen() * color.getGreen()) / 255, + (dst_c.getBlue() * color.getBlue()) / 255 + ); + dst->setPixel(x, y, dst_c); + } +} + +/* + Apply color to destination, using a Screen blend mode +*/ +static void apply_screen(video::IImage *dst, v2u32 dst_pos, v2u32 size, + const video::SColor color) +{ + video::SColor dst_c; + + for (u32 y = dst_pos.Y; y < dst_pos.Y + size.Y; y++) + for (u32 x = dst_pos.X; x < dst_pos.X + size.X; x++) { + dst_c = dst->getPixel(x, y); + dst_c.set( + dst_c.getAlpha(), + 255 - ((255 - dst_c.getRed()) * (255 - color.getRed())) / 255, + 255 - ((255 - dst_c.getGreen()) * (255 - color.getGreen())) / 255, + 255 - ((255 - dst_c.getBlue()) * (255 - color.getBlue())) / 255 + ); + dst->setPixel(x, y, dst_c); + } +} + +/* + Adjust the hue, saturation, and lightness of destination. Like + "Hue-Saturation" in GIMP, but with 0 as the mid-point. + Hue should be from -180 to +180, or from 0 to 360. + Saturation and Lightness are percentages. + Lightness is from -100 to +100. + Saturation goes down to -100 (fully desaturated) but can go above 100, + allowing for even muted colors to become saturated. + + If colorize is true then saturation is from 0 to 100, and destination will + be converted to a grayscale image as seen through a colored glass, like + "Colorize" in GIMP. +*/ +static void apply_hue_saturation(video::IImage *dst, v2u32 dst_pos, v2u32 size, + s32 hue, s32 saturation, s32 lightness, bool colorize) +{ + video::SColorf colorf; + video::SColorHSL hsl; + f32 norm_s = core::clamp(saturation, -100, 1000) / 100.0f; + f32 norm_l = core::clamp(lightness, -100, 100) / 100.0f; + + if (colorize) { + hsl.Saturation = core::clamp((f32)saturation, 0.0f, 100.0f); + } + + for (u32 y = dst_pos.Y; y < dst_pos.Y + size.Y; y++) + for (u32 x = dst_pos.X; x < dst_pos.X + size.X; x++) { + + if (colorize) { + f32 lum = dst->getPixel(x, y).getLuminance() / 255.0f; + + if (norm_l < 0) { + lum *= norm_l + 1.0f; + } else { + lum = lum * (1.0f - norm_l) + norm_l; + } + hsl.Hue = 0; + hsl.Luminance = lum * 100; + + } else { + // convert the RGB to HSL + colorf = video::SColorf(dst->getPixel(x, y)); + hsl.fromRGB(colorf); + + if (norm_l < 0) { + hsl.Luminance *= norm_l + 1.0f; + } else{ + hsl.Luminance = hsl.Luminance + norm_l * (100.0f - hsl.Luminance); + } + + // Adjusting saturation in the same manner as lightness resulted in + // muted colors being affected too much and bright colors not + // affected enough, so I'm borrowing a leaf out of gimp's book and + // using a different scaling approach for saturation. + // https://github.com/GNOME/gimp/blob/6cc1e035f1822bf5198e7e99a53f7fa6e281396a/app/operations/gimpoperationhuesaturation.c#L139-L145= + // This difference is why values over 100% are not necessary for + // lightness but are very useful with saturation. An alternative UI + // approach would be to have an upper saturation limit of 100, but + // multiply positive values by ~3 to make it a more useful positive + // range scale. + hsl.Saturation *= norm_s + 1.0f; + hsl.Saturation = core::clamp(hsl.Saturation, 0.0f, 100.0f); + } + + // Apply the specified HSL adjustments + hsl.Hue = fmod(hsl.Hue + hue, 360); + if (hsl.Hue < 0) + hsl.Hue += 360; + + // Convert back to RGB + hsl.toRGB(colorf); + dst->setPixel(x, y, colorf.toSColor()); + } +} + + +/* + Apply an Overlay blend to destination + If hardlight is true then swap the dst & blend images (a hardlight blend) +*/ +static void apply_overlay(video::IImage *blend, video::IImage *dst, + v2s32 blend_pos, v2s32 dst_pos, v2u32 size, bool hardlight) +{ + video::IImage *blend_layer = hardlight ? dst : blend; + video::IImage *base_layer = hardlight ? blend : dst; + v2s32 blend_layer_pos = hardlight ? dst_pos : blend_pos; + v2s32 base_layer_pos = hardlight ? blend_pos : dst_pos; + + for (u32 y = 0; y < size.Y; y++) + for (u32 x = 0; x < size.X; x++) { + s32 base_x = x + base_layer_pos.X; + s32 base_y = y + base_layer_pos.Y; + + video::SColor blend_c = + blend_layer->getPixel(x + blend_layer_pos.X, y + blend_layer_pos.Y); + video::SColor base_c = base_layer->getPixel(base_x, base_y); + double blend_r = blend_c.getRed() / 255.0; + double blend_g = blend_c.getGreen() / 255.0; + double blend_b = blend_c.getBlue() / 255.0; + double base_r = base_c.getRed() / 255.0; + double base_g = base_c.getGreen() / 255.0; + double base_b = base_c.getBlue() / 255.0; + + base_c.set( + base_c.getAlpha(), + // Do a Multiply blend if less that 0.5, otherwise do a Screen blend + (u32)((base_r < 0.5 ? 2 * base_r * blend_r : 1 - 2 * (1 - base_r) * (1 - blend_r)) * 255), + (u32)((base_g < 0.5 ? 2 * base_g * blend_g : 1 - 2 * (1 - base_g) * (1 - blend_g)) * 255), + (u32)((base_b < 0.5 ? 2 * base_b * blend_b : 1 - 2 * (1 - base_b) * (1 - blend_b)) * 255) + ); + dst->setPixel(base_x, base_y, base_c); + } +} + +/* + Adjust the brightness and contrast of the base image. + + Conceptually like GIMP's "Brightness-Contrast" feature but allows brightness to be + wound all the way up to white or down to black. +*/ +static void apply_brightness_contrast(video::IImage *dst, v2u32 dst_pos, v2u32 size, + s32 brightness, s32 contrast) +{ + video::SColor dst_c; + // Only allow normalized contrast to get as high as 127/128 to avoid infinite slope. + // (we could technically allow -128/128 here as that would just result in 0 slope) + double norm_c = core::clamp(contrast, -127, 127) / 128.0; + double norm_b = core::clamp(brightness, -127, 127) / 127.0; + + // Scale brightness so its range is -127.5 to 127.5, otherwise brightness + // adjustments will outputs values from 0.5 to 254.5 instead of 0 to 255. + double scaled_b = brightness * 127.5 / 127; + + // Calculate a contrast slope such that that no colors will get clamped due + // to the brightness setting. + // This allows the texture modifier to used as a brightness modifier without + // the user having to calculate a contrast to avoid clipping at that brightness. + double slope = 1 - fabs(norm_b); + + // Apply the user's contrast adjustment to the calculated slope, such that + // -127 will make it near-vertical and +127 will make it horizontal + double angle = atan(slope); + angle += norm_c <= 0 + ? norm_c * angle // allow contrast slope to be lowered to 0 + : norm_c * (M_PI_2 - angle); // allow contrast slope to be raised almost vert. + slope = tan(angle); + + double c = slope <= 1 + ? -slope * 127.5 + 127.5 + scaled_b // shift up/down when slope is horiz. + : -slope * (127.5 - scaled_b) + 127.5; // shift left/right when slope is vert. + + // add 0.5 to c so that when the final result is cast to int, it is effectively + // rounded rather than trunc'd. + c += 0.5; + + for (u32 y = dst_pos.Y; y < dst_pos.Y + size.Y; y++) + for (u32 x = dst_pos.X; x < dst_pos.X + size.X; x++) { + dst_c = dst->getPixel(x, y); + + dst_c.set( + dst_c.getAlpha(), + core::clamp((int)(slope * dst_c.getRed() + c), 0, 255), + core::clamp((int)(slope * dst_c.getGreen() + c), 0, 255), + core::clamp((int)(slope * dst_c.getBlue() + c), 0, 255) + ); + dst->setPixel(x, y, dst_c); + } +} + +/* + Apply mask to destination +*/ +static void apply_mask(video::IImage *mask, video::IImage *dst, + v2s32 mask_pos, v2s32 dst_pos, v2u32 size) +{ + for (u32 y0 = 0; y0 < size.Y; y0++) { + for (u32 x0 = 0; x0 < size.X; x0++) { + s32 mask_x = x0 + mask_pos.X; + s32 mask_y = y0 + mask_pos.Y; + s32 dst_x = x0 + dst_pos.X; + s32 dst_y = y0 + dst_pos.Y; + video::SColor mask_c = mask->getPixel(mask_x, mask_y); + video::SColor dst_c = dst->getPixel(dst_x, dst_y); + dst_c.color &= mask_c.color; + dst->setPixel(dst_x, dst_y, dst_c); + } + } +} + +video::IImage *create_crack_image(video::IImage *crack, s32 frame_index, + core::dimension2d size, u8 tiles, video::IVideoDriver *driver) +{ + core::dimension2d strip_size = crack->getDimension(); + + if (tiles == 0 || strip_size.getArea() == 0) + return nullptr; + + core::dimension2d frame_size(strip_size.Width, strip_size.Width); + core::dimension2d tile_size(size / tiles); + s32 frame_count = strip_size.Height / strip_size.Width; + if (frame_index >= frame_count) + frame_index = frame_count - 1; + core::rect frame(v2s32(0, frame_index * frame_size.Height), frame_size); + video::IImage *result = nullptr; + + // extract crack frame + video::IImage *crack_tile = driver->createImage(video::ECF_A8R8G8B8, tile_size); + if (!crack_tile) + return nullptr; + if (tile_size == frame_size) { + crack->copyTo(crack_tile, v2s32(0, 0), frame); + } else { + video::IImage *crack_frame = driver->createImage(video::ECF_A8R8G8B8, frame_size); + if (!crack_frame) + goto exit__has_tile; + crack->copyTo(crack_frame, v2s32(0, 0), frame); + crack_frame->copyToScaling(crack_tile); + crack_frame->drop(); + } + if (tiles == 1) + return crack_tile; + + // tile it + result = driver->createImage(video::ECF_A8R8G8B8, size); + if (!result) + goto exit__has_tile; + result->fill({}); + for (u8 i = 0; i < tiles; i++) + for (u8 j = 0; j < tiles; j++) + crack_tile->copyTo(result, v2s32(i * tile_size.Width, j * tile_size.Height)); + +exit__has_tile: + crack_tile->drop(); + return result; +} + +static void draw_crack(video::IImage *crack, video::IImage *dst, + bool use_overlay, s32 frame_count, s32 progression, + video::IVideoDriver *driver, u8 tiles) +{ + // Dimension of destination image + core::dimension2d dim_dst = dst->getDimension(); + // Limit frame_count + if (frame_count > (s32) dim_dst.Height) + frame_count = dim_dst.Height; + if (frame_count < 1) + frame_count = 1; + // Dimension of the scaled crack stage, + // which is the same as the dimension of a single destination frame + core::dimension2d frame_size( + dim_dst.Width, + dim_dst.Height / frame_count + ); + video::IImage *crack_scaled = create_crack_image(crack, progression, + frame_size, tiles, driver); + if (!crack_scaled) + return; + + auto blit = use_overlay ? blit_with_alpha : blit_with_alpha; + for (s32 i = 0; i < frame_count; ++i) { + v2s32 dst_pos(0, frame_size.Height * i); + blit(crack_scaled, dst, dst_pos, frame_size); + } + + crack_scaled->drop(); +} + +void brighten(video::IImage *image) +{ + if (image == NULL) + return; + + core::dimension2d dim = image->getDimension(); + + for (u32 y=0; ygetPixel(x,y); + c.setRed(0.5 * 255 + 0.5 * (float)c.getRed()); + c.setGreen(0.5 * 255 + 0.5 * (float)c.getGreen()); + c.setBlue(0.5 * 255 + 0.5 * (float)c.getBlue()); + image->setPixel(x,y,c); + } +} + +u32 parseImageTransform(std::string_view s) +{ + int total_transform = 0; + + std::string transform_names[8]; + transform_names[0] = "i"; + transform_names[1] = "r90"; + transform_names[2] = "r180"; + transform_names[3] = "r270"; + transform_names[4] = "fx"; + transform_names[6] = "fy"; + + std::size_t pos = 0; + while(pos < s.size()) + { + int transform = -1; + for (int i = 0; i <= 7; ++i) + { + const std::string &name_i = transform_names[i]; + + if (s[pos] == ('0' + i)) + { + transform = i; + pos++; + break; + } + + if (!(name_i.empty()) && lowercase(s.substr(pos, name_i.size())) == name_i) { + transform = i; + pos += name_i.size(); + break; + } + } + if (transform < 0) + break; + + // Multiply total_transform and transform in the group D4 + int new_total = 0; + if (transform < 4) + new_total = (transform + total_transform) % 4; + else + new_total = (transform - total_transform + 8) % 4; + if ((transform >= 4) ^ (total_transform >= 4)) + new_total += 4; + + total_transform = new_total; + } + return total_transform; +} + +core::dimension2d imageTransformDimension(u32 transform, core::dimension2d dim) +{ + if (transform % 2 == 0) + return dim; + + return core::dimension2d(dim.Height, dim.Width); +} + +void imageTransform(u32 transform, video::IImage *src, video::IImage *dst) +{ + if (src == NULL || dst == NULL) + return; + + core::dimension2d dstdim = dst->getDimension(); + + // Pre-conditions + assert(dstdim == imageTransformDimension(transform, src->getDimension())); + assert(transform <= 7); + + /* + Compute the transformation from source coordinates (sx,sy) + to destination coordinates (dx,dy). + */ + int sxn = 0; + int syn = 2; + if (transform == 0) // identity + sxn = 0, syn = 2; // sx = dx, sy = dy + else if (transform == 1) // rotate by 90 degrees ccw + sxn = 3, syn = 0; // sx = (H-1) - dy, sy = dx + else if (transform == 2) // rotate by 180 degrees + sxn = 1, syn = 3; // sx = (W-1) - dx, sy = (H-1) - dy + else if (transform == 3) // rotate by 270 degrees ccw + sxn = 2, syn = 1; // sx = dy, sy = (W-1) - dx + else if (transform == 4) // flip x + sxn = 1, syn = 2; // sx = (W-1) - dx, sy = dy + else if (transform == 5) // flip x then rotate by 90 degrees ccw + sxn = 2, syn = 0; // sx = dy, sy = dx + else if (transform == 6) // flip y + sxn = 0, syn = 3; // sx = dx, sy = (H-1) - dy + else if (transform == 7) // flip y then rotate by 90 degrees ccw + sxn = 3, syn = 1; // sx = (H-1) - dy, sy = (W-1) - dx + + for (u32 dy=0; dygetPixel(sx,sy); + dst->setPixel(dx,dy,c); + } +} + +namespace { + // For more colorspace transformations, see for example + // https://github.com/tobspr/GLSL-Color-Spaces/blob/master/ColorSpaces.inc.glsl + + inline float linear_to_srgb_component(float v) + { + if (v > 0.0031308f) + return 1.055f * powf(v, 1.0f / 2.4f) - 0.055f; + return 12.92f * v; + } + inline float srgb_to_linear_component(float v) + { + if (v > 0.04045f) + return powf((v + 0.055f) / 1.055f, 2.4f); + return v / 12.92f; + } + + v3f srgb_to_linear(const video::SColor col_srgb) + { + v3f col(col_srgb.getRed(), col_srgb.getGreen(), col_srgb.getBlue()); + col /= 255.0f; + col.X = srgb_to_linear_component(col.X); + col.Y = srgb_to_linear_component(col.Y); + col.Z = srgb_to_linear_component(col.Z); + return col; + } + + video::SColor linear_to_srgb(const v3f col_linear) + { + v3f col; + col.X = linear_to_srgb_component(col_linear.X); + col.Y = linear_to_srgb_component(col_linear.Y); + col.Z = linear_to_srgb_component(col_linear.Z); + col *= 255.0f; + col.X = core::clamp(col.X, 0.0f, 255.0f); + col.Y = core::clamp(col.Y, 0.0f, 255.0f); + col.Z = core::clamp(col.Z, 0.0f, 255.0f); + return video::SColor(0xff, myround(col.X), myround(col.Y), + myround(col.Z)); + } +} + + +/////////////////////////// +// ImageSource Functions // +/////////////////////////// + +#define CHECK_BASEIMG() \ + do { \ + if (!baseimg) { \ + errorstream << "generateImagePart(): baseimg == NULL" \ + << " for part_of_name=\"" << part_of_name \ + << "\", cancelling." << std::endl; \ + return false; \ + } \ + } while(0) + +#define COMPLAIN_INVALID(description) \ + do { \ + errorstream << "generateImagePart(): invalid " << (description) \ + << " for part_of_name=\"" << part_of_name \ + << "\", cancelling." << std::endl; \ + return false; \ + } while(0) + +#define CHECK_DIM(w, h) \ + do { \ + if ((w) <= 0 || (h) <= 0 || (w) >= 0xffff || (h) >= 0xffff) { \ + COMPLAIN_INVALID("width or height"); \ + } \ + } while(0) + +bool ImageSource::generateImagePart(std::string_view part_of_name, + video::IImage *& baseimg, std::set &source_image_names) +{ + const char escape = '\\'; // same as in generateImage() + video::IVideoDriver *driver = RenderingEngine::get_video_driver(); + sanity_check(driver); + + if (baseimg && (baseimg->getDimension().Width == 0 || + baseimg->getDimension().Height == 0)) { + errorstream << "generateImagePart(): baseimg is zero-sized?!" + << std::endl; + baseimg->drop(); + baseimg = nullptr; + } + + // Stuff starting with [ are special commands + if (part_of_name.empty() || part_of_name[0] != '[') { + std::string part_s(part_of_name); + source_image_names.insert(part_s); + video::IImage *image = m_sourcecache.getOrLoad(part_s); + if (!image) { + // Do not create the dummy texture + if (part_of_name.empty()) + return true; + + // Do not create normalmap dummies + if (str_ends_with(part_of_name, "_normal.png")) { + warningstream << "generateImagePart(): Could not load normal map \"" + << part_of_name << "\"" << std::endl; + return true; + } + + errorstream << "generateImagePart(): Could not load image \"" + << part_of_name << "\" while building texture; " + "Creating a dummy image" << std::endl; + + core::dimension2d dim(1,1); + image = driver->createImage(video::ECF_A8R8G8B8, dim); + sanity_check(image != NULL); + image->setPixel(0,0, video::SColor(255,myrand()%256, + myrand()%256,myrand()%256)); + } + + // If base image is NULL, load as base. + if (baseimg == NULL) + { + /* + Copy it this way to get an alpha channel. + Otherwise images with alpha cannot be blitted on + images that don't have alpha in the original file. + */ + core::dimension2d dim = image->getDimension(); + baseimg = driver->createImage(video::ECF_A8R8G8B8, dim); + image->copyTo(baseimg); + } + // Else blit on base. + else + { + blitBaseImage(image, baseimg); + } + + image->drop(); + } + else + { + // A special texture modification + + /* + [crack:N:P + [cracko:N:P + Adds a cracking texture + N = animation frame count, P = crack progression + */ + if (str_starts_with(part_of_name, "[crack")) + { + CHECK_BASEIMG(); + + // Crack image number and overlay option + // Format: crack[o][:]:: + bool use_overlay = (part_of_name[6] == 'o'); + Strfnd sf(part_of_name); + sf.next(":"); + s32 frame_count = stoi(sf.next(":")); + s32 progression = stoi(sf.next(":")); + s32 tiles = 1; + // Check whether there is the argument, that is, + // whether there are 3 arguments. If so, shift values + // as the first and not the last argument is optional. + auto s = sf.next(":"); + if (!s.empty()) { + tiles = frame_count; + frame_count = progression; + progression = stoi(s); + } + + if (progression >= 0) { + /* + Load crack image. + + It is an image with a number of cracking stages + horizontally tiled. + */ + video::IImage *img_crack = m_sourcecache.getOrLoad( + "crack_anylength.png"); + + if (img_crack) { + draw_crack(img_crack, baseimg, + use_overlay, frame_count, + progression, driver, tiles); + img_crack->drop(); + } + } + } + /* + [combine:WxH:X,Y=filename:X,Y=filename2 + Creates a bigger texture from any amount of smaller ones + */ + else if (str_starts_with(part_of_name, "[combine")) + { + Strfnd sf(part_of_name); + sf.next(":"); + u32 w0 = stoi(sf.next("x")); + u32 h0 = stoi(sf.next(":")); + if (!baseimg) { + CHECK_DIM(w0, h0); + baseimg = driver->createImage(video::ECF_A8R8G8B8, {w0, h0}); + baseimg->fill(video::SColor(0,0,0,0)); + } + + while (!sf.at_end()) { + v2s32 pos_base; + pos_base.X = stoi(sf.next(",")); + pos_base.Y = stoi(sf.next("=")); + std::string filename = unescape_string(sf.next_esc(":", escape), escape); + + auto basedim = baseimg->getDimension(); + if (pos_base.X > (s32)basedim.Width || pos_base.Y > (s32)basedim.Height) { + warningstream << "generateImagePart(): Skipping \"" + << filename << "\" as it's out-of-bounds " << pos_base + << " for [combine" << std::endl; + continue; + } + infostream << "Adding \"" << filename<< "\" to combined " + << pos_base << std::endl; + + video::IImage *img = generateImage(filename, source_image_names); + if (!img) { + errorstream << "generateImagePart(): Failed to load image \"" + << filename << "\" for [combine" << std::endl; + continue; + } + const auto dim = img->getDimension(); + if (pos_base.X + dim.Width <= 0 || pos_base.Y + dim.Height <= 0) { + warningstream << "generateImagePart(): Skipping \"" + << filename << "\" as it's out-of-bounds " << pos_base + << " for [combine" << std::endl; + img->drop(); + continue; + } + + blit_with_alpha(img, baseimg, pos_base, dim); + img->drop(); + } + } + /* + [fill:WxH:color + [fill:WxH:X,Y:color + Creates a texture of the given size and color, optionally with an , + position. An alpha value may be specified in the `Colorstring`. + */ + else if (str_starts_with(part_of_name, "[fill")) + { + u32 x = 0; + u32 y = 0; + + Strfnd sf(part_of_name); + sf.next(":"); + u32 width = stoi(sf.next("x")); + u32 height = stoi(sf.next(":")); + std::string color_or_x = sf.next(","); + + video::SColor color; + if (!parseColorString(color_or_x, color, true)) { + x = stoi(color_or_x); + y = stoi(sf.next(":")); + std::string color_str = sf.next(":"); + + if (!parseColorString(color_str, color, false)) + return false; + } + core::dimension2d dim(width, height); + + CHECK_DIM(dim.Width, dim.Height); + if (baseimg) { + auto basedim = baseimg->getDimension(); + if (x >= basedim.Width || y >= basedim.Height) + COMPLAIN_INVALID("X or Y offset"); + } + + video::IImage *img = driver->createImage(video::ECF_A8R8G8B8, dim); + img->fill(color); + + if (baseimg == nullptr) { + baseimg = img; + } else { + blit_with_alpha(img, baseimg, v2s32(x, y), dim); + img->drop(); + } + } + /* + [brighten + */ + else if (str_starts_with(part_of_name, "[brighten")) + { + CHECK_BASEIMG(); + + brighten(baseimg); + } + /* + [noalpha + Make image completely opaque. + Used for the leaves texture when in old leaves mode, so + that the transparent parts don't look completely black + when simple alpha channel is used for rendering. + */ + else if (str_starts_with(part_of_name, "[noalpha")) + { + CHECK_BASEIMG(); + core::dimension2d dim = baseimg->getDimension(); + + // Set alpha to full + for (u32 y=0; ygetPixel(x,y); + c.setAlpha(255); + baseimg->setPixel(x,y,c); + } + } + /* + [makealpha:R,G,B + Convert one color to transparent. + */ + else if (str_starts_with(part_of_name, "[makealpha:")) + { + CHECK_BASEIMG(); + + Strfnd sf(part_of_name.substr(11)); + u32 r1 = stoi(sf.next(",")); + u32 g1 = stoi(sf.next(",")); + u32 b1 = stoi(sf.next("")); + + core::dimension2d dim = baseimg->getDimension(); + + for (u32 y=0; ygetPixel(x,y); + u32 r = c.getRed(); + u32 g = c.getGreen(); + u32 b = c.getBlue(); + if (!(r == r1 && g == g1 && b == b1)) + continue; + c.setAlpha(0); + baseimg->setPixel(x,y,c); + } + } + /* + [transformN + Rotates and/or flips the image. + + N can be a number (between 0 and 7) or a transform name. + Rotations are counter-clockwise. + 0 I identity + 1 R90 rotate by 90 degrees + 2 R180 rotate by 180 degrees + 3 R270 rotate by 270 degrees + 4 FX flip X + 5 FXR90 flip X then rotate by 90 degrees + 6 FY flip Y + 7 FYR90 flip Y then rotate by 90 degrees + + Note: Transform names can be concatenated to produce + their product (applies the first then the second). + The resulting transform will be equivalent to one of the + eight existing ones, though (see: dihedral group). + */ + else if (str_starts_with(part_of_name, "[transform")) + { + CHECK_BASEIMG(); + + u32 transform = parseImageTransform(part_of_name.substr(10)); + core::dimension2d dim = imageTransformDimension( + transform, baseimg->getDimension()); + video::IImage *image = driver->createImage( + baseimg->getColorFormat(), dim); + sanity_check(image != NULL); + imageTransform(transform, baseimg, image); + baseimg->drop(); + baseimg = image; + } + /* + [inventorycube{topimage{leftimage{rightimage + In every subimage, replace ^ with &. + Create an "inventory cube". + NOTE: This should be used only on its own. + Example (a grass block (not actually used in game): + "[inventorycube{grass.png{mud.png&grass_side.png{mud.png&grass_side.png" + */ + else if (str_starts_with(part_of_name, "[inventorycube")) + { + if (baseimg) { + errorstream<<"generateImagePart(): baseimg != NULL " + <<"for part_of_name=\""<drop(); + img_left->drop(); + img_right->drop(); + + return true; + } + /* + [lowpart:percent:filename + Adds the lower part of a texture + */ + else if (str_starts_with(part_of_name, "[lowpart:")) + { + Strfnd sf(part_of_name); + sf.next(":"); + u32 percent = stoi(sf.next(":"), 0, 100); + std::string filename = unescape_string(sf.next_esc(":", escape), escape); + + video::IImage *img = generateImage(filename, source_image_names); + if (img) { + core::dimension2d dim = img->getDimension(); + if (!baseimg) + baseimg = driver->createImage(video::ECF_A8R8G8B8, dim); + + core::position2d pos_base(0, 0); + core::position2d clippos(0, 0); + clippos.Y = dim.Height * (100-percent) / 100; + core::dimension2d clipdim = dim; + clipdim.Height = clipdim.Height * percent / 100 + 1; + core::rect cliprect(clippos, clipdim); + img->copyToWithAlpha(baseimg, pos_base, + core::rect(v2s32(0,0), dim), + video::SColor(255,255,255,255), + &cliprect); + img->drop(); + } + } + /* + [verticalframe:N:I + Crops a frame of a vertical animation. + N = frame count, I = frame index + */ + else if (str_starts_with(part_of_name, "[verticalframe:")) + { + CHECK_BASEIMG(); + + Strfnd sf(part_of_name); + sf.next(":"); + u32 frame_count = stoi(sf.next(":")); + u32 frame_index = stoi(sf.next(":")); + + if (frame_count == 0){ + errorstream << "generateImagePart(): invalid frame_count " + << "for part_of_name=\"" << part_of_name + << "\", using frame_count = 1 instead." << std::endl; + frame_count = 1; + } + if (frame_index >= frame_count) + frame_index = frame_count - 1; + + v2u32 frame_size = baseimg->getDimension(); + frame_size.Y /= frame_count; + + video::IImage *img = driver->createImage(video::ECF_A8R8G8B8, + frame_size); + + // Fill target image with transparency + img->fill(video::SColor(0,0,0,0)); + + core::dimension2d dim = frame_size; + core::position2d pos_dst(0, 0); + core::position2d pos_src(0, frame_index * frame_size.Y); + baseimg->copyToWithAlpha(img, pos_dst, + core::rect(pos_src, dim), + video::SColor(255,255,255,255), + NULL); + // Replace baseimg + baseimg->drop(); + baseimg = img; + } + /* + [mask:filename + Applies a mask to an image + */ + else if (str_starts_with(part_of_name, "[mask:")) + { + CHECK_BASEIMG(); + + Strfnd sf(part_of_name); + sf.next(":"); + std::string filename = unescape_string(sf.next_esc(":", escape), escape); + + video::IImage *img = generateImage(filename, source_image_names); + if (img) { + apply_mask(img, baseimg, v2s32(0, 0), v2s32(0, 0), + img->getDimension()); + img->drop(); + } else { + errorstream << "generateImagePart(): Failed to load image \"" + << filename << "\" for [mask" << std::endl; + } + } + /* + [multiply:color + or + [screen:color + Multiply and Screen blend modes are basic blend modes for darkening and lightening + images, respectively. + A Multiply blend multiplies a given color to every pixel of an image. + A Screen blend has the opposite effect to a Multiply blend. + color = color as ColorString + */ + else if (str_starts_with(part_of_name, "[multiply:") || + str_starts_with(part_of_name, "[screen:")) { + Strfnd sf(part_of_name); + sf.next(":"); + std::string color_str = sf.next(":"); + + CHECK_BASEIMG(); + + video::SColor color; + + if (!parseColorString(color_str, color, false)) + return false; + if (str_starts_with(part_of_name, "[multiply:")) { + apply_multiplication(baseimg, v2u32(0, 0), + baseimg->getDimension(), color); + } else { + apply_screen(baseimg, v2u32(0, 0), baseimg->getDimension(), color); + } + } + /* + [colorize:color:ratio + Overlays image with given color + color = color as ColorString + ratio = optional string "alpha", or a weighting between 0 and 255 + */ + else if (str_starts_with(part_of_name, "[colorize:")) + { + Strfnd sf(part_of_name); + sf.next(":"); + std::string color_str = sf.next(":"); + std::string ratio_str = sf.next(":"); + + CHECK_BASEIMG(); + + video::SColor color; + int ratio = -1; + bool keep_alpha = false; + + if (!parseColorString(color_str, color, false)) + return false; + + if (is_number(ratio_str)) + ratio = mystoi(ratio_str, 0, 255); + else if (ratio_str == "alpha") + keep_alpha = true; + + apply_colorize(baseimg, v2u32(0, 0), baseimg->getDimension(), color, ratio, keep_alpha); + } + /* + [applyfiltersformesh + Internal modifier + */ + else if (str_starts_with(part_of_name, "[applyfiltersformesh")) + { + /* IMPORTANT: When changing this, getTextureForMesh() needs to be + * updated too. */ + + CHECK_BASEIMG(); + + // Apply the "clean transparent" filter, if needed + if (m_setting_mipmap || m_setting_bilinear_filter || + m_setting_trilinear_filter || m_setting_anisotropic_filter) + imageCleanTransparent(baseimg, 127); + + /* Upscale textures to user's requested minimum size. This is a trick to make + * filters look as good on low-res textures as on high-res ones, by making + * low-res textures BECOME high-res ones. This is helpful for worlds that + * mix high- and low-res textures, or for mods with least-common-denominator + * textures that don't have the resources to offer high-res alternatives. + */ + const bool filter = m_setting_trilinear_filter || m_setting_bilinear_filter; + const s32 scaleto = filter ? g_settings->getU16("texture_min_size") : 1; + if (scaleto > 1) { + const core::dimension2d dim = baseimg->getDimension(); + + /* Calculate scaling needed to make the shortest texture dimension + * equal to the target minimum. If e.g. this is a vertical frames + * animation, the short dimension will be the real size. + */ + u32 xscale = scaleto / dim.Width; + u32 yscale = scaleto / dim.Height; + const s32 scale = std::max(xscale, yscale); + + // Never downscale; only scale up by 2x or more. + if (scale > 1) { + u32 w = scale * dim.Width; + u32 h = scale * dim.Height; + const core::dimension2d newdim(w, h); + video::IImage *newimg = driver->createImage( + baseimg->getColorFormat(), newdim); + baseimg->copyToScaling(newimg); + baseimg->drop(); + baseimg = newimg; + } + } + } + /* + [resize:WxH + Resizes the base image to the given dimensions + */ + else if (str_starts_with(part_of_name, "[resize")) + { + CHECK_BASEIMG(); + + Strfnd sf(part_of_name); + sf.next(":"); + u32 width = stoi(sf.next("x")); + u32 height = stoi(sf.next("")); + CHECK_DIM(width, height); + + video::IImage *image = driver-> + createImage(video::ECF_A8R8G8B8, {width, height}); + baseimg->copyToScaling(image); + baseimg->drop(); + baseimg = image; + } + /* + [opacity:R + Makes the base image transparent according to the given ratio. + R must be between 0 and 255. + 0 means totally transparent. + 255 means totally opaque. + */ + else if (str_starts_with(part_of_name, "[opacity:")) { + CHECK_BASEIMG(); + + Strfnd sf(part_of_name); + sf.next(":"); + + u32 ratio = mystoi(sf.next(""), 0, 255); + + core::dimension2d dim = baseimg->getDimension(); + + for (u32 y = 0; y < dim.Height; y++) + for (u32 x = 0; x < dim.Width; x++) + { + video::SColor c = baseimg->getPixel(x, y); + c.setAlpha(floor((c.getAlpha() * ratio) / 255 + 0.5)); + baseimg->setPixel(x, y, c); + } + } + /* + [invert:mode + Inverts the given channels of the base image. + Mode may contain the characters "r", "g", "b", "a". + Only the channels that are mentioned in the mode string + will be inverted. + */ + else if (str_starts_with(part_of_name, "[invert:")) { + CHECK_BASEIMG(); + + Strfnd sf(part_of_name); + sf.next(":"); + + std::string mode = sf.next(""); + u32 mask = 0; + if (mode.find('a') != std::string::npos) + mask |= 0xff000000UL; + if (mode.find('r') != std::string::npos) + mask |= 0x00ff0000UL; + if (mode.find('g') != std::string::npos) + mask |= 0x0000ff00UL; + if (mode.find('b') != std::string::npos) + mask |= 0x000000ffUL; + + core::dimension2d dim = baseimg->getDimension(); + + for (u32 y = 0; y < dim.Height; y++) + for (u32 x = 0; x < dim.Width; x++) + { + video::SColor c = baseimg->getPixel(x, y); + c.color ^= mask; + baseimg->setPixel(x, y, c); + } + } + /* + [sheet:WxH:X,Y + Retrieves a tile at position X,Y (in tiles) + from the base image it assumes to be a + tilesheet with dimensions W,H (in tiles). + */ + else if (str_starts_with(part_of_name, "[sheet:")) { + CHECK_BASEIMG(); + + Strfnd sf(part_of_name); + sf.next(":"); + u32 w0 = stoi(sf.next("x")); + u32 h0 = stoi(sf.next(":")); + u32 x0 = stoi(sf.next(",")); + u32 y0 = stoi(sf.next(":")); + + CHECK_DIM(w0, h0); + if (x0 >= w0 || y0 >= h0) + COMPLAIN_INVALID("tile position (X,Y)"); + + core::dimension2d img_dim = baseimg->getDimension(); + core::dimension2d tile_dim(v2u32(img_dim) / v2u32(w0, h0)); + if (tile_dim.Width == 0) + tile_dim.Width = 1; + if (tile_dim.Height == 0) + tile_dim.Height = 1; + + video::IImage *img = driver->createImage( + video::ECF_A8R8G8B8, tile_dim); + img->fill(video::SColor(0,0,0,0)); + + v2u32 vdim(tile_dim); + core::rect rect(v2s32(x0 * vdim.X, y0 * vdim.Y), tile_dim); + baseimg->copyToWithAlpha(img, v2s32(0), rect, + video::SColor(255,255,255,255), NULL); + + // Replace baseimg + baseimg->drop(); + baseimg = img; + } + /* + [png:base64 + Decodes a PNG image in base64 form. + Use minetest.encode_png and minetest.encode_base64 + to produce a valid string. + */ + else if (str_starts_with(part_of_name, "[png:")) { + std::string png; + { + auto blob = part_of_name.substr(5); + if (!base64_is_valid(blob)) { + errorstream << "generateImagePart(): " + << "malformed base64 in [png" << std::endl; + return false; + } + png = base64_decode(blob); + } + + auto *device = RenderingEngine::get_raw_device(); + auto *fs = device->getFileSystem(); + auto *vd = device->getVideoDriver(); + auto *memfile = fs->createMemoryReadFile(png.data(), png.size(), "__temp_png"); + video::IImage* pngimg = vd->createImageFromFile(memfile); + memfile->drop(); + + if (!pngimg) { + errorstream << "generateImagePart(): Invalid PNG data" << std::endl; + return false; + } + + if (baseimg) { + blitBaseImage(pngimg, baseimg); + } else { + core::dimension2d dim = pngimg->getDimension(); + baseimg = driver->createImage(video::ECF_A8R8G8B8, dim); + pngimg->copyTo(baseimg); + } + pngimg->drop(); + } + /* + [hsl:hue:saturation:lightness + or + [colorizehsl:hue:saturation:lightness + + Adjust the hue, saturation, and lightness of the base image. Like + "Hue-Saturation" in GIMP, but with 0 as the mid-point. + Hue should be from -180 to +180, though 0 to 360 is also supported. + Saturation and lightness are optional, with lightness from -100 to + +100, and sauration from -100 to +100-or-higher. + + If colorize is true then saturation is from 0 to 100, and the image + will be converted to a grayscale image as though seen through a + colored glass, like "Colorize" in GIMP. + */ + else if (str_starts_with(part_of_name, "[hsl:") || + str_starts_with(part_of_name, "[colorizehsl:")) { + + CHECK_BASEIMG(); + + bool colorize = str_starts_with(part_of_name, "[colorizehsl:"); + + // saturation range is 0 to 100 when colorize is true + s32 defaultSaturation = colorize ? 50 : 0; + + Strfnd sf(part_of_name); + sf.next(":"); + s32 hue = mystoi(sf.next(":"), -180, 360); + s32 saturation = sf.at_end() ? defaultSaturation : mystoi(sf.next(":"), -100, 1000); + s32 lightness = sf.at_end() ? 0 : mystoi(sf.next(":"), -100, 100); + + + apply_hue_saturation(baseimg, v2u32(0, 0), baseimg->getDimension(), + hue, saturation, lightness, colorize); + } + /* + [overlay:filename + or + [hardlight:filename + + "A.png^[hardlight:B.png" is the same as "B.png^[overlay:A.Png" + + Applies an Overlay or Hard Light blend between two images, like the + layer modes of the same names in GIMP. + Overlay combines Multiply and Screen blend modes. The parts of the + top layer where the base layer is light become lighter, the parts + where the base layer is dark become darker. Areas where the base + layer are mid grey are unaffected. An overlay with the same picture + looks like an S-curve. + + Swapping the top layer and base layer is a Hard Light blend + */ + else if (str_starts_with(part_of_name, "[overlay:") || + str_starts_with(part_of_name, "[hardlight:")) { + + CHECK_BASEIMG(); + + Strfnd sf(part_of_name); + sf.next(":"); + std::string filename = unescape_string(sf.next_esc(":", escape), escape); + + video::IImage *img = generateImage(filename, source_image_names); + if (img) { + upscaleImagesToMatchLargest(baseimg, img); + + bool hardlight = str_starts_with(part_of_name, "[hardlight:"); + apply_overlay(img, baseimg, v2s32(0, 0), v2s32(0, 0), + img->getDimension(), hardlight); + img->drop(); + } else { + errorstream << "generateImage(): Failed to load image \"" + << filename << "\" for [overlay or [hardlight" << std::endl; + } + } + /* + [contrast:C:B + + Adjust the brightness and contrast of the base image. Conceptually + like GIMP's "Brightness-Contrast" feature but allows brightness to + be wound all the way up to white or down to black. + C and B are both values from -127 to +127. + B is optional. + */ + else if (str_starts_with(part_of_name, "[contrast:")) { + + CHECK_BASEIMG(); + + Strfnd sf(part_of_name); + sf.next(":"); + s32 contrast = mystoi(sf.next(":"), -127, 127); + s32 brightness = sf.at_end() ? 0 : mystoi(sf.next(":"), -127, 127); + + apply_brightness_contrast(baseimg, v2u32(0, 0), + baseimg->getDimension(), brightness, contrast); + } + else + { + errorstream << "generateImagePart(): Invalid " + " modification: \"" << part_of_name << "\"" << std::endl; + } + } + + return true; +} + +#undef CHECK_BASEIMG + +#undef COMPLAIN_INVALID + +#undef CHECK_DIM + + +video::IImage* ImageSource::generateImage(std::string_view name, + std::set &source_image_names) +{ + // Get the base image + + const char separator = '^'; + const char escape = '\\'; + const char paren_open = '('; + const char paren_close = ')'; + + // Find last separator in the name + s32 last_separator_pos = -1; + u8 paren_bal = 0; + for (s32 i = name.size() - 1; i >= 0; i--) { + if (i > 0 && name[i-1] == escape) + continue; + switch (name[i]) { + case separator: + if (paren_bal == 0) { + last_separator_pos = i; + i = -1; // break out of loop + } + break; + case paren_open: + if (paren_bal == 0) { + errorstream << "generateImage(): unbalanced parentheses" + << "(extranous '(') while generating texture \"" + << name << "\"" << std::endl; + return NULL; + } + paren_bal--; + break; + case paren_close: + paren_bal++; + break; + default: + break; + } + } + if (paren_bal > 0) { + errorstream << "generateImage(): unbalanced parentheses" + << "(missing matching '(') while generating texture \"" + << name << "\"" << std::endl; + return NULL; + } + + + video::IImage *baseimg = NULL; + + /* + If separator was found, make the base image + using a recursive call. + */ + if (last_separator_pos != -1) { + baseimg = generateImage(name.substr(0, last_separator_pos), source_image_names); + } + + /* + Parse out the last part of the name of the image and act + according to it + */ + + auto last_part_of_name = name.substr(last_separator_pos + 1); + + /* + If this name is enclosed in parentheses, generate it + and blit it onto the base image + */ + if (last_part_of_name.empty()) { + // keep baseimg == nullptr + } else if (last_part_of_name[0] == paren_open + && last_part_of_name.back() == paren_close) { + auto name2 = last_part_of_name.substr(1, + last_part_of_name.size() - 2); + video::IImage *tmp = generateImage(name2, source_image_names); + if (!tmp) { + errorstream << "generateImage(): " + "Failed to generate \"" << name2 << "\"" + << std::endl; + return NULL; + } + + if (baseimg) { + core::dimension2d dim = tmp->getDimension(); + blit_with_alpha(tmp, baseimg, v2s32(0, 0), dim); + tmp->drop(); + } else { + baseimg = tmp; + } + } else if (!generateImagePart(last_part_of_name, baseimg, source_image_names)) { + // Generate image according to part of name + errorstream << "generateImage(): " + "Failed to generate \"" << last_part_of_name << "\"" + << std::endl; + } + + // If no resulting image, print a warning + if (baseimg == NULL) { + errorstream << "generateImage(): baseimg is NULL (attempted to" + " create texture \"" << name << "\")" << std::endl; + } else if (baseimg->getDimension().Width == 0 || + baseimg->getDimension().Height == 0) { + errorstream << "generateImage(): zero-sized image was created?! " + "(attempted to create texture \"" << name << "\")" << std::endl; + baseimg->drop(); + baseimg = nullptr; + } + + return baseimg; +} + +video::SColor ImageSource::getImageAverageColor(const video::IImage &image) +{ + video::SColor c(0, 0, 0, 0); + u32 total = 0; + v3f col_acc(0, 0, 0); + core::dimension2d dim = image.getDimension(); + u16 step = 1; + if (dim.Width > 16) + step = dim.Width / 16; + for (u16 x = 0; x < dim.Width; x += step) { + for (u16 y = 0; y < dim.Width; y += step) { + c = image.getPixel(x,y); + if (c.getAlpha() > 0) { + total++; + col_acc += srgb_to_linear(c); + } + } + } + if (total > 0) { + col_acc /= total; + c = linear_to_srgb(col_acc); + } + c.setAlpha(255); + return c; +} + +void ImageSource::insertImage(const std::string &name, video::IImage *img, bool prefer_local) { + m_sourcecache.insert(name, img, prefer_local); +} diff --git a/src/client/imagesource.h b/src/client/imagesource.h new file mode 100644 index 000000000..15c982f8a --- /dev/null +++ b/src/client/imagesource.h @@ -0,0 +1,84 @@ +/* +Minetest +Copyright (C) 2010-2013 celeron55, Perttu Ahola + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU Lesser General Public License as published by +the Free Software Foundation; either version 2.1 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along +with this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#pragma once + +#include +#include +#include "settings.h" + +// This file is only for internal generation/modification of images. +// Use texturesource.h instead to handle textures. + +// A cache used for storing source images. +class SourceImageCache { +public: + ~SourceImageCache(); + + void insert(const std::string &name, video::IImage *img, bool prefer_local); + + video::IImage* get(const std::string &name); + + // Primarily fetches from cache, secondarily tries to read from filesystem + video::IImage *getOrLoad(const std::string &name); +private: + std::map m_images; +}; + +/* + * Generates and caches images. + * The image name defines the image by filename and texture modifiers. +*/ +struct ImageSource { + /*! Generates an image from a full string like + * "stone.png^mineral_coal.png^[crack:1:0". + * The returned Image should be dropped. + * source_image_names is important to determine when to flush the image from a cache (dynamic media) + */ + video::IImage* generateImage(std::string_view name, std::set &source_image_names); + + // To add self made images. + void insertImage(const std::string &name, video::IImage *img, bool prefer_local); + + // TODO should probably be moved elsewhere + static video::SColor getImageAverageColor(const video::IImage &image); + + ImageSource() : + m_setting_mipmap{g_settings->getBool("mip_map")}, + m_setting_trilinear_filter{g_settings->getBool("trilinear_filter")}, + m_setting_bilinear_filter{g_settings->getBool("bilinear_filter")}, + m_setting_anisotropic_filter{g_settings->getBool("anisotropic_filter")} + {}; + +private: + + // Generate image based on a string like "stone.png" or "[crack:1:0". + // if baseimg is NULL, it is created. Otherwise stuff is made on it. + // source_image_names is important to determine when to flush the image from a cache (dynamic media) + bool generateImagePart(std::string_view part_of_name, video::IImage *& baseimg, std::set &source_image_names); + + // Cached settings needed for making textures from meshes + bool m_setting_mipmap; + bool m_setting_trilinear_filter; + bool m_setting_bilinear_filter; + bool m_setting_anisotropic_filter; + + // Cache of source images + SourceImageCache m_sourcecache; +}; diff --git a/src/client/texturesource.cpp b/src/client/texturesource.cpp index e23b88dbe..7e56a57cd 100644 --- a/src/client/texturesource.cpp +++ b/src/client/texturesource.cpp @@ -20,17 +20,12 @@ with this program; if not, write to the Free Software Foundation, Inc., #include "texturesource.h" #include -#include #include "util/thread.h" -#include "settings.h" -#include "util/strfnd.h" #include "imagefilters.h" #include "guiscalingfilter.h" #include "renderingengine.h" -#include "util/base64.h" -#include "irrlicht_changes/printing.h" -#include "util/numeric.h" #include "texturepaths.h" +#include "imagesource.h" /* Stores internal information about a texture. @@ -63,90 +58,6 @@ struct TextureInfo } }; -/* - SourceImageCache: A cache used for storing source images. -*/ - -class SourceImageCache -{ -public: - ~SourceImageCache() { - for (auto &m_image : m_images) { - m_image.second->drop(); - } - m_images.clear(); - } - void insert(const std::string &name, video::IImage *img, bool prefer_local) - { - assert(img); // Pre-condition - // Remove old image - std::map::iterator n; - n = m_images.find(name); - if (n != m_images.end()){ - if (n->second) - n->second->drop(); - } - - video::IImage* toadd = img; - bool need_to_grab = true; - - // Try to use local texture instead if asked to - if (prefer_local) { - bool is_base_pack; - std::string path = getTexturePath(name, &is_base_pack); - // Ignore base pack - if (!path.empty() && !is_base_pack) { - video::IImage *img2 = RenderingEngine::get_video_driver()-> - createImageFromFile(path.c_str()); - if (img2){ - toadd = img2; - need_to_grab = false; - } - } - } - - if (need_to_grab) - toadd->grab(); - m_images[name] = toadd; - } - video::IImage* get(const std::string &name) - { - std::map::iterator n; - n = m_images.find(name); - if (n != m_images.end()) - return n->second; - return NULL; - } - // Primarily fetches from cache, secondarily tries to read from filesystem - video::IImage *getOrLoad(const std::string &name) - { - std::map::iterator n; - n = m_images.find(name); - if (n != m_images.end()){ - n->second->grab(); // Grab for caller - return n->second; - } - video::IVideoDriver *driver = RenderingEngine::get_video_driver(); - std::string path = getTexturePath(name); - if (path.empty()) { - infostream<<"SourceImageCache::getOrLoad(): No path found for \"" - <createImageFromFile(path.c_str()); - - if (img){ - m_images[name] = img; - img->grab(); // Grab for caller - } - return img; - } -private: - std::map m_images; -}; - /* TextureSource */ @@ -256,9 +167,9 @@ private: // The id of the thread that is allowed to use irrlicht directly std::thread::id m_main_thread; - // Cache of source images + // Generates and caches source images // This should be only accessed from the main thread - SourceImageCache m_sourcecache; + ImageSource m_imagesource; // Rebuild images and textures from the current set of source images // Shall be called from the main thread. @@ -268,19 +179,6 @@ private: // Generate a texture u32 generateTexture(const std::string &name); - // Generate image based on a string like "stone.png" or "[crack:1:0". - // if baseimg is NULL, it is created. Otherwise stuff is made on it. - // source_image_names is important to determine when to flush the image from a cache (dynamic media) - bool generateImagePart(std::string_view part_of_name, video::IImage *& baseimg, std::set &source_image_names); - - /*! Generates an image from a full string like - * "stone.png^mineral_coal.png^[crack:1:0". - * Shall be called from the main thread. - * The returned Image should be dropped. - * source_image_names is important to determine when to flush the image from a cache (dynamic media) - */ - video::IImage* generateImage(std::string_view name, std::set &source_image_names); - // Thread-safe cache of what source images are known (true = known) MutexedMap m_source_image_existence; @@ -404,78 +302,6 @@ u32 TextureSource::getTextureId(const std::string &name) return 0; } - -/** Draw an image on top of another one with gamma-incorrect alpha compositing - * - * This exists because IImage::copyToWithAlpha() doesn't seem to always work. - * - * \tparam overlay If enabled, only modify pixels in dst which are fully opaque. - * Defaults to false. - * \param src Top image. This image must have the ECF_A8R8G8B8 color format. - * \param dst Bottom image. - * The top image is drawn onto this base image in-place. - * \param dst_pos An offset vector to move src before drawing it onto dst - * \param size Size limit of the copied area -*/ -template -static void blit_with_alpha(video::IImage *src, video::IImage *dst, - v2s32 dst_pos, v2u32 size); - -// Apply a color to an image. Uses an int (0-255) to calculate the ratio. -// If the ratio is 255 or -1 and keep_alpha is true, then it multiples the -// color alpha with the destination alpha. -// Otherwise, any pixels that are not fully transparent get the color alpha. -static void apply_colorize(video::IImage *dst, v2u32 dst_pos, v2u32 size, - const video::SColor color, int ratio, bool keep_alpha); - -// paint a texture using the given color -static void apply_multiplication(video::IImage *dst, v2u32 dst_pos, v2u32 size, - const video::SColor color); - -// Perform a Screen blend with the given color. The opposite effect of a -// Multiply blend. -static void apply_screen(video::IImage *dst, v2u32 dst_pos, v2u32 size, - const video::SColor color); - -// Adjust the hue, saturation, and lightness of destination. Like -// "Hue-Saturation" in GIMP. -// If colorize is true then the image will be converted to a grayscale -// image as though seen through a colored glass, like "Colorize" in GIMP. -static void apply_hue_saturation(video::IImage *dst, v2u32 dst_pos, v2u32 size, - s32 hue, s32 saturation, s32 lightness, bool colorize); - -// Apply an overlay blend to an images. -// Overlay blend combines Multiply and Screen blend modes.The parts of the top -// layer where the base layer is light become lighter, the parts where the base -// layer is dark become darker.Areas where the base layer are mid grey are -// unaffected.An overlay with the same picture looks like an S - curve. -static void apply_overlay(video::IImage *overlay, video::IImage *dst, - v2s32 overlay_pos, v2s32 dst_pos, v2u32 size, bool hardlight); - -// Adjust the brightness and contrast of the base image. Conceptually like -// "Brightness-Contrast" in GIMP but allowing brightness to be wound all the -// way up to white or down to black. -static void apply_brightness_contrast(video::IImage *dst, v2u32 dst_pos, v2u32 size, - s32 brightness, s32 contrast); - -// Apply a mask to an image -static void apply_mask(video::IImage *mask, video::IImage *dst, - v2s32 mask_pos, v2s32 dst_pos, v2u32 size); - -// Draw or overlay a crack -static void draw_crack(video::IImage *crack, video::IImage *dst, - bool use_overlay, s32 frame_count, s32 progression, - video::IVideoDriver *driver, u8 tiles = 1); - -// Brighten image -void brighten(video::IImage *image); -// Parse a transform name -u32 parseImageTransform(std::string_view s); -// Apply transform to image dimension -core::dimension2d imageTransformDimension(u32 transform, core::dimension2d dim); -// Apply transform to image data -void imageTransform(u32 transform, video::IImage *src, video::IImage *dst); - /* This method generates all the textures */ @@ -512,7 +338,7 @@ u32 TextureSource::generateTexture(const std::string &name) // passed into texture info for dynamic media tracking std::set source_image_names; - video::IImage *img = generateImage(name, source_image_names); + video::IImage *img = m_imagesource.generateImage(name, source_image_names); video::ITexture *tex = NULL; @@ -595,7 +421,7 @@ Palette* TextureSource::getPalette(const std::string &name) if (it == m_palettes.end()) { // Create palette std::set source_image_names; // unused, sadly. - video::IImage *img = generateImage(name, source_image_names); + video::IImage *img = m_imagesource.generateImage(name, source_image_names); if (!img) { warningstream << "TextureSource::getPalette(): palette \"" << name << "\" could not be loaded." << std::endl; @@ -658,7 +484,7 @@ void TextureSource::insertSourceImage(const std::string &name, video::IImage *im { sanity_check(std::this_thread::get_id() == m_main_thread); - m_sourcecache.insert(name, img, true); + m_imagesource.insertImage(name, img, true); m_source_image_existence.set(name, true); // now we need to check for any textures that need updating @@ -707,7 +533,7 @@ void TextureSource::rebuildTexture(video::IVideoDriver *driver, TextureInfo &ti) // replaces the previous sourceImages // shouldn't really need to be done, but can't hurt std::set source_image_names; - video::IImage *img = generateImage(ti.name, source_image_names); + video::IImage *img = m_imagesource.generateImage(ti.name, source_image_names); img = Align2Npot2(img, driver); // Create texture from resulting image video::ITexture *t = NULL; @@ -725,1715 +551,6 @@ void TextureSource::rebuildTexture(video::IVideoDriver *driver, TextureInfo &ti) m_texture_trash.push_back(t_old); } -inline static void applyShadeFactor(video::SColor &color, u32 factor) -{ - u32 f = core::clamp(factor, 0, 256); - color.setRed(color.getRed() * f / 256); - color.setGreen(color.getGreen() * f / 256); - color.setBlue(color.getBlue() * f / 256); -} - -static video::IImage *createInventoryCubeImage( - video::IImage *top, video::IImage *left, video::IImage *right) -{ - core::dimension2du size_top = top->getDimension(); - core::dimension2du size_left = left->getDimension(); - core::dimension2du size_right = right->getDimension(); - - u32 size = npot2(std::max({ - size_top.Width, size_top.Height, - size_left.Width, size_left.Height, - size_right.Width, size_right.Height, - })); - - // It must be divisible by 4, to let everything work correctly. - // But it is a power of 2, so being at least 4 is the same. - // And the resulting texture should't be too large as well. - size = core::clamp(size, 4, 64); - - // With such parameters, the cube fits exactly, touching each image line - // from `0` to `cube_size - 1`. (Note that division is exact here). - u32 cube_size = 9 * size; - u32 offset = size / 2; - - video::IVideoDriver *driver = RenderingEngine::get_video_driver(); - - auto lock_image = [size, driver] (video::IImage *&image) -> const u32 * { - image->grab(); - core::dimension2du dim = image->getDimension(); - video::ECOLOR_FORMAT format = image->getColorFormat(); - if (dim.Width != size || dim.Height != size || format != video::ECF_A8R8G8B8) { - video::IImage *scaled = driver->createImage(video::ECF_A8R8G8B8, {size, size}); - image->copyToScaling(scaled); - image->drop(); - image = scaled; - } - sanity_check(image->getPitch() == 4 * size); - return reinterpret_cast(image->getData()); - }; - auto free_image = [] (video::IImage *image) -> void { - image->drop(); - }; - - video::IImage *result = driver->createImage(video::ECF_A8R8G8B8, {cube_size, cube_size}); - sanity_check(result->getPitch() == 4 * cube_size); - result->fill(video::SColor(0x00000000u)); - u32 *target = reinterpret_cast(result->getData()); - - // Draws single cube face - // `shade_factor` is face brightness, in range [0.0, 1.0] - // (xu, xv, x1; yu, yv, y1) form coordinate transformation matrix - // `offsets` list pixels to be drawn for single source pixel - auto draw_image = [=] (video::IImage *image, float shade_factor, - s16 xu, s16 xv, s16 x1, - s16 yu, s16 yv, s16 y1, - std::initializer_list offsets) -> void { - u32 brightness = core::clamp(256 * shade_factor, 0, 256); - const u32 *source = lock_image(image); - for (u16 v = 0; v < size; v++) { - for (u16 u = 0; u < size; u++) { - video::SColor pixel(*source); - applyShadeFactor(pixel, brightness); - s16 x = xu * u + xv * v + x1; - s16 y = yu * u + yv * v + y1; - for (const auto &off : offsets) - target[(y + off.Y) * cube_size + (x + off.X) + offset] = pixel.color; - source++; - } - } - free_image(image); - }; - - draw_image(top, 1.000000f, - 4, -4, 4 * (size - 1), - 2, 2, 0, - { - {2, 0}, {3, 0}, {4, 0}, {5, 0}, - {0, 1}, {1, 1}, {2, 1}, {3, 1}, {4, 1}, {5, 1}, {6, 1}, {7, 1}, - {2, 2}, {3, 2}, {4, 2}, {5, 2}, - }); - - draw_image(left, 0.836660f, - 4, 0, 0, - 2, 5, 2 * size, - { - {0, 0}, {1, 0}, - {0, 1}, {1, 1}, {2, 1}, {3, 1}, - {0, 2}, {1, 2}, {2, 2}, {3, 2}, - {0, 3}, {1, 3}, {2, 3}, {3, 3}, - {0, 4}, {1, 4}, {2, 4}, {3, 4}, - {2, 5}, {3, 5}, - }); - - draw_image(right, 0.670820f, - 4, 0, 4 * size, - -2, 5, 4 * size - 2, - { - {2, 0}, {3, 0}, - {0, 1}, {1, 1}, {2, 1}, {3, 1}, - {0, 2}, {1, 2}, {2, 2}, {3, 2}, - {0, 3}, {1, 3}, {2, 3}, {3, 3}, - {0, 4}, {1, 4}, {2, 4}, {3, 4}, - {0, 5}, {1, 5}, - }); - - return result; -} - -video::IImage* TextureSource::generateImage(std::string_view name, - std::set &source_image_names) -{ - // Get the base image - - const char separator = '^'; - const char escape = '\\'; - const char paren_open = '('; - const char paren_close = ')'; - - // Find last separator in the name - s32 last_separator_pos = -1; - u8 paren_bal = 0; - for (s32 i = name.size() - 1; i >= 0; i--) { - if (i > 0 && name[i-1] == escape) - continue; - switch (name[i]) { - case separator: - if (paren_bal == 0) { - last_separator_pos = i; - i = -1; // break out of loop - } - break; - case paren_open: - if (paren_bal == 0) { - errorstream << "generateImage(): unbalanced parentheses" - << "(extranous '(') while generating texture \"" - << name << "\"" << std::endl; - return NULL; - } - paren_bal--; - break; - case paren_close: - paren_bal++; - break; - default: - break; - } - } - if (paren_bal > 0) { - errorstream << "generateImage(): unbalanced parentheses" - << "(missing matching '(') while generating texture \"" - << name << "\"" << std::endl; - return NULL; - } - - - video::IImage *baseimg = NULL; - - /* - If separator was found, make the base image - using a recursive call. - */ - if (last_separator_pos != -1) { - baseimg = generateImage(name.substr(0, last_separator_pos), source_image_names); - } - - /* - Parse out the last part of the name of the image and act - according to it - */ - - auto last_part_of_name = name.substr(last_separator_pos + 1); - - /* - If this name is enclosed in parentheses, generate it - and blit it onto the base image - */ - if (last_part_of_name.empty()) { - // keep baseimg == nullptr - } else if (last_part_of_name[0] == paren_open - && last_part_of_name.back() == paren_close) { - auto name2 = last_part_of_name.substr(1, - last_part_of_name.size() - 2); - video::IImage *tmp = generateImage(name2, source_image_names); - if (!tmp) { - errorstream << "generateImage(): " - "Failed to generate \"" << name2 << "\"" - << std::endl; - return NULL; - } - - if (baseimg) { - core::dimension2d dim = tmp->getDimension(); - blit_with_alpha(tmp, baseimg, v2s32(0, 0), dim); - tmp->drop(); - } else { - baseimg = tmp; - } - } else if (!generateImagePart(last_part_of_name, baseimg, source_image_names)) { - // Generate image according to part of name - errorstream << "generateImage(): " - "Failed to generate \"" << last_part_of_name << "\"" - << std::endl; - } - - // If no resulting image, print a warning - if (baseimg == NULL) { - errorstream << "generateImage(): baseimg is NULL (attempted to" - " create texture \"" << name << "\")" << std::endl; - } else if (baseimg->getDimension().Width == 0 || - baseimg->getDimension().Height == 0) { - errorstream << "generateImage(): zero-sized image was created?! " - "(attempted to create texture \"" << name << "\")" << std::endl; - baseimg->drop(); - baseimg = nullptr; - } - - return baseimg; -} - -static std::string unescape_string(const std::string &str, const char esc = '\\') -{ - std::string out; - size_t pos = 0, cpos; - out.reserve(str.size()); - while (1) { - cpos = str.find_first_of(esc, pos); - if (cpos == std::string::npos) { - out += str.substr(pos); - break; - } - out += str.substr(pos, cpos - pos) + str[cpos + 1]; - pos = cpos + 2; - } - return out; -} - -/* - Replaces the smaller of the two images with one upscaled to match the - dimensions of the other. - Ensure no other references to these images are being held, as one may - get dropped and switched with a new image. -*/ -void upscaleImagesToMatchLargest(video::IImage *& img1, - video::IImage *& img2) -{ - core::dimension2d dim1 = img1->getDimension(); - core::dimension2d dim2 = img2->getDimension(); - - if (dim1 == dim2) { - // image dimensions match, no scaling required - - } - else if (dim1.Width * dim1.Height < dim2.Width * dim2.Height) { - // Upscale img1 - video::IImage *scaled_image = RenderingEngine::get_video_driver()-> - createImage(video::ECF_A8R8G8B8, dim2); - img1->copyToScaling(scaled_image); - img1->drop(); - img1 = scaled_image; - - } else { - // Upscale img2 - video::IImage *scaled_image = RenderingEngine::get_video_driver()-> - createImage(video::ECF_A8R8G8B8, dim1); - img2->copyToScaling(scaled_image); - img2->drop(); - img2 = scaled_image; - } -} - -void blitBaseImage(video::IImage* &src, video::IImage* &dst) -{ - //infostream<<"Blitting "< dim_dst = dst->getDimension(); - // Position to copy the blitted to in the base image - core::position2d pos_to(0,0); - - blit_with_alpha(src, dst, pos_to, dim_dst); -} - -#define CHECK_BASEIMG() \ - do { \ - if (!baseimg) { \ - errorstream << "generateImagePart(): baseimg == NULL" \ - << " for part_of_name=\"" << part_of_name \ - << "\", cancelling." << std::endl; \ - return false; \ - } \ - } while(0) - -#define COMPLAIN_INVALID(description) \ - do { \ - errorstream << "generateImagePart(): invalid " << (description) \ - << " for part_of_name=\"" << part_of_name \ - << "\", cancelling." << std::endl; \ - return false; \ - } while(0) - -#define CHECK_DIM(w, h) \ - do { \ - if ((w) <= 0 || (h) <= 0 || (w) >= 0xffff || (h) >= 0xffff) { \ - COMPLAIN_INVALID("width or height"); \ - } \ - } while(0) - -bool TextureSource::generateImagePart(std::string_view part_of_name, - video::IImage *& baseimg, std::set &source_image_names) -{ - const char escape = '\\'; // same as in generateImage() - video::IVideoDriver *driver = RenderingEngine::get_video_driver(); - sanity_check(driver); - - if (baseimg && (baseimg->getDimension().Width == 0 || - baseimg->getDimension().Height == 0)) { - errorstream << "generateImagePart(): baseimg is zero-sized?!" - << std::endl; - baseimg->drop(); - baseimg = nullptr; - } - - // Stuff starting with [ are special commands - if (part_of_name.empty() || part_of_name[0] != '[') { - std::string part_s(part_of_name); - source_image_names.insert(part_s); - video::IImage *image = m_sourcecache.getOrLoad(part_s); - if (!image) { - // Do not create the dummy texture - if (part_of_name.empty()) - return true; - - // Do not create normalmap dummies - if (str_ends_with(part_of_name, "_normal.png")) { - warningstream << "generateImagePart(): Could not load normal map \"" - << part_of_name << "\"" << std::endl; - return true; - } - - errorstream << "generateImagePart(): Could not load image \"" - << part_of_name << "\" while building texture; " - "Creating a dummy image" << std::endl; - - core::dimension2d dim(1,1); - image = driver->createImage(video::ECF_A8R8G8B8, dim); - sanity_check(image != NULL); - image->setPixel(0,0, video::SColor(255,myrand()%256, - myrand()%256,myrand()%256)); - } - - // If base image is NULL, load as base. - if (baseimg == NULL) - { - /* - Copy it this way to get an alpha channel. - Otherwise images with alpha cannot be blitted on - images that don't have alpha in the original file. - */ - core::dimension2d dim = image->getDimension(); - baseimg = driver->createImage(video::ECF_A8R8G8B8, dim); - image->copyTo(baseimg); - } - // Else blit on base. - else - { - blitBaseImage(image, baseimg); - } - - image->drop(); - } - else - { - // A special texture modification - - /* - [crack:N:P - [cracko:N:P - Adds a cracking texture - N = animation frame count, P = crack progression - */ - if (str_starts_with(part_of_name, "[crack")) - { - CHECK_BASEIMG(); - - // Crack image number and overlay option - // Format: crack[o][:]:: - bool use_overlay = (part_of_name[6] == 'o'); - Strfnd sf(part_of_name); - sf.next(":"); - s32 frame_count = stoi(sf.next(":")); - s32 progression = stoi(sf.next(":")); - s32 tiles = 1; - // Check whether there is the argument, that is, - // whether there are 3 arguments. If so, shift values - // as the first and not the last argument is optional. - auto s = sf.next(":"); - if (!s.empty()) { - tiles = frame_count; - frame_count = progression; - progression = stoi(s); - } - - if (progression >= 0) { - /* - Load crack image. - - It is an image with a number of cracking stages - horizontally tiled. - */ - video::IImage *img_crack = m_sourcecache.getOrLoad( - "crack_anylength.png"); - - if (img_crack) { - draw_crack(img_crack, baseimg, - use_overlay, frame_count, - progression, driver, tiles); - img_crack->drop(); - } - } - } - /* - [combine:WxH:X,Y=filename:X,Y=filename2 - Creates a bigger texture from any amount of smaller ones - */ - else if (str_starts_with(part_of_name, "[combine")) - { - Strfnd sf(part_of_name); - sf.next(":"); - u32 w0 = stoi(sf.next("x")); - u32 h0 = stoi(sf.next(":")); - if (!baseimg) { - CHECK_DIM(w0, h0); - baseimg = driver->createImage(video::ECF_A8R8G8B8, {w0, h0}); - baseimg->fill(video::SColor(0,0,0,0)); - } - - while (!sf.at_end()) { - v2s32 pos_base; - pos_base.X = stoi(sf.next(",")); - pos_base.Y = stoi(sf.next("=")); - std::string filename = unescape_string(sf.next_esc(":", escape), escape); - - auto basedim = baseimg->getDimension(); - if (pos_base.X > (s32)basedim.Width || pos_base.Y > (s32)basedim.Height) { - warningstream << "generateImagePart(): Skipping \"" - << filename << "\" as it's out-of-bounds " << pos_base - << " for [combine" << std::endl; - continue; - } - infostream << "Adding \"" << filename<< "\" to combined " - << pos_base << std::endl; - - video::IImage *img = generateImage(filename, source_image_names); - if (!img) { - errorstream << "generateImagePart(): Failed to load image \"" - << filename << "\" for [combine" << std::endl; - continue; - } - const auto dim = img->getDimension(); - if (pos_base.X + dim.Width <= 0 || pos_base.Y + dim.Height <= 0) { - warningstream << "generateImagePart(): Skipping \"" - << filename << "\" as it's out-of-bounds " << pos_base - << " for [combine" << std::endl; - img->drop(); - continue; - } - - blit_with_alpha(img, baseimg, pos_base, dim); - img->drop(); - } - } - /* - [fill:WxH:color - [fill:WxH:X,Y:color - Creates a texture of the given size and color, optionally with an , - position. An alpha value may be specified in the `Colorstring`. - */ - else if (str_starts_with(part_of_name, "[fill")) - { - u32 x = 0; - u32 y = 0; - - Strfnd sf(part_of_name); - sf.next(":"); - u32 width = stoi(sf.next("x")); - u32 height = stoi(sf.next(":")); - std::string color_or_x = sf.next(","); - - video::SColor color; - if (!parseColorString(color_or_x, color, true)) { - x = stoi(color_or_x); - y = stoi(sf.next(":")); - std::string color_str = sf.next(":"); - - if (!parseColorString(color_str, color, false)) - return false; - } - core::dimension2d dim(width, height); - - CHECK_DIM(dim.Width, dim.Height); - if (baseimg) { - auto basedim = baseimg->getDimension(); - if (x >= basedim.Width || y >= basedim.Height) - COMPLAIN_INVALID("X or Y offset"); - } - - video::IImage *img = driver->createImage(video::ECF_A8R8G8B8, dim); - img->fill(color); - - if (baseimg == nullptr) { - baseimg = img; - } else { - blit_with_alpha(img, baseimg, v2s32(x, y), dim); - img->drop(); - } - } - /* - [brighten - */ - else if (str_starts_with(part_of_name, "[brighten")) - { - CHECK_BASEIMG(); - - brighten(baseimg); - } - /* - [noalpha - Make image completely opaque. - Used for the leaves texture when in old leaves mode, so - that the transparent parts don't look completely black - when simple alpha channel is used for rendering. - */ - else if (str_starts_with(part_of_name, "[noalpha")) - { - CHECK_BASEIMG(); - core::dimension2d dim = baseimg->getDimension(); - - // Set alpha to full - for (u32 y=0; ygetPixel(x,y); - c.setAlpha(255); - baseimg->setPixel(x,y,c); - } - } - /* - [makealpha:R,G,B - Convert one color to transparent. - */ - else if (str_starts_with(part_of_name, "[makealpha:")) - { - CHECK_BASEIMG(); - - Strfnd sf(part_of_name.substr(11)); - u32 r1 = stoi(sf.next(",")); - u32 g1 = stoi(sf.next(",")); - u32 b1 = stoi(sf.next("")); - - core::dimension2d dim = baseimg->getDimension(); - - for (u32 y=0; ygetPixel(x,y); - u32 r = c.getRed(); - u32 g = c.getGreen(); - u32 b = c.getBlue(); - if (!(r == r1 && g == g1 && b == b1)) - continue; - c.setAlpha(0); - baseimg->setPixel(x,y,c); - } - } - /* - [transformN - Rotates and/or flips the image. - - N can be a number (between 0 and 7) or a transform name. - Rotations are counter-clockwise. - 0 I identity - 1 R90 rotate by 90 degrees - 2 R180 rotate by 180 degrees - 3 R270 rotate by 270 degrees - 4 FX flip X - 5 FXR90 flip X then rotate by 90 degrees - 6 FY flip Y - 7 FYR90 flip Y then rotate by 90 degrees - - Note: Transform names can be concatenated to produce - their product (applies the first then the second). - The resulting transform will be equivalent to one of the - eight existing ones, though (see: dihedral group). - */ - else if (str_starts_with(part_of_name, "[transform")) - { - CHECK_BASEIMG(); - - u32 transform = parseImageTransform(part_of_name.substr(10)); - core::dimension2d dim = imageTransformDimension( - transform, baseimg->getDimension()); - video::IImage *image = driver->createImage( - baseimg->getColorFormat(), dim); - sanity_check(image != NULL); - imageTransform(transform, baseimg, image); - baseimg->drop(); - baseimg = image; - } - /* - [inventorycube{topimage{leftimage{rightimage - In every subimage, replace ^ with &. - Create an "inventory cube". - NOTE: This should be used only on its own. - Example (a grass block (not actually used in game): - "[inventorycube{grass.png{mud.png&grass_side.png{mud.png&grass_side.png" - */ - else if (str_starts_with(part_of_name, "[inventorycube")) - { - if (baseimg) { - errorstream<<"generateImagePart(): baseimg != NULL " - <<"for part_of_name=\""<drop(); - img_left->drop(); - img_right->drop(); - - return true; - } - /* - [lowpart:percent:filename - Adds the lower part of a texture - */ - else if (str_starts_with(part_of_name, "[lowpart:")) - { - Strfnd sf(part_of_name); - sf.next(":"); - u32 percent = stoi(sf.next(":"), 0, 100); - std::string filename = unescape_string(sf.next_esc(":", escape), escape); - - video::IImage *img = generateImage(filename, source_image_names); - if (img) { - core::dimension2d dim = img->getDimension(); - if (!baseimg) - baseimg = driver->createImage(video::ECF_A8R8G8B8, dim); - - core::position2d pos_base(0, 0); - core::position2d clippos(0, 0); - clippos.Y = dim.Height * (100-percent) / 100; - core::dimension2d clipdim = dim; - clipdim.Height = clipdim.Height * percent / 100 + 1; - core::rect cliprect(clippos, clipdim); - img->copyToWithAlpha(baseimg, pos_base, - core::rect(v2s32(0,0), dim), - video::SColor(255,255,255,255), - &cliprect); - img->drop(); - } - } - /* - [verticalframe:N:I - Crops a frame of a vertical animation. - N = frame count, I = frame index - */ - else if (str_starts_with(part_of_name, "[verticalframe:")) - { - CHECK_BASEIMG(); - - Strfnd sf(part_of_name); - sf.next(":"); - u32 frame_count = stoi(sf.next(":")); - u32 frame_index = stoi(sf.next(":")); - - if (frame_count == 0){ - errorstream << "generateImagePart(): invalid frame_count " - << "for part_of_name=\"" << part_of_name - << "\", using frame_count = 1 instead." << std::endl; - frame_count = 1; - } - if (frame_index >= frame_count) - frame_index = frame_count - 1; - - v2u32 frame_size = baseimg->getDimension(); - frame_size.Y /= frame_count; - - video::IImage *img = driver->createImage(video::ECF_A8R8G8B8, - frame_size); - - // Fill target image with transparency - img->fill(video::SColor(0,0,0,0)); - - core::dimension2d dim = frame_size; - core::position2d pos_dst(0, 0); - core::position2d pos_src(0, frame_index * frame_size.Y); - baseimg->copyToWithAlpha(img, pos_dst, - core::rect(pos_src, dim), - video::SColor(255,255,255,255), - NULL); - // Replace baseimg - baseimg->drop(); - baseimg = img; - } - /* - [mask:filename - Applies a mask to an image - */ - else if (str_starts_with(part_of_name, "[mask:")) - { - CHECK_BASEIMG(); - - Strfnd sf(part_of_name); - sf.next(":"); - std::string filename = unescape_string(sf.next_esc(":", escape), escape); - - video::IImage *img = generateImage(filename, source_image_names); - if (img) { - apply_mask(img, baseimg, v2s32(0, 0), v2s32(0, 0), - img->getDimension()); - img->drop(); - } else { - errorstream << "generateImagePart(): Failed to load image \"" - << filename << "\" for [mask" << std::endl; - } - } - /* - [multiply:color - or - [screen:color - Multiply and Screen blend modes are basic blend modes for darkening and lightening - images, respectively. - A Multiply blend multiplies a given color to every pixel of an image. - A Screen blend has the opposite effect to a Multiply blend. - color = color as ColorString - */ - else if (str_starts_with(part_of_name, "[multiply:") || - str_starts_with(part_of_name, "[screen:")) { - Strfnd sf(part_of_name); - sf.next(":"); - std::string color_str = sf.next(":"); - - CHECK_BASEIMG(); - - video::SColor color; - - if (!parseColorString(color_str, color, false)) - return false; - if (str_starts_with(part_of_name, "[multiply:")) { - apply_multiplication(baseimg, v2u32(0, 0), - baseimg->getDimension(), color); - } else { - apply_screen(baseimg, v2u32(0, 0), baseimg->getDimension(), color); - } - } - /* - [colorize:color:ratio - Overlays image with given color - color = color as ColorString - ratio = optional string "alpha", or a weighting between 0 and 255 - */ - else if (str_starts_with(part_of_name, "[colorize:")) - { - Strfnd sf(part_of_name); - sf.next(":"); - std::string color_str = sf.next(":"); - std::string ratio_str = sf.next(":"); - - CHECK_BASEIMG(); - - video::SColor color; - int ratio = -1; - bool keep_alpha = false; - - if (!parseColorString(color_str, color, false)) - return false; - - if (is_number(ratio_str)) - ratio = mystoi(ratio_str, 0, 255); - else if (ratio_str == "alpha") - keep_alpha = true; - - apply_colorize(baseimg, v2u32(0, 0), baseimg->getDimension(), color, ratio, keep_alpha); - } - /* - [applyfiltersformesh - Internal modifier - */ - else if (str_starts_with(part_of_name, "[applyfiltersformesh")) - { - /* IMPORTANT: When changing this, getTextureForMesh() needs to be - * updated too. */ - - CHECK_BASEIMG(); - - // Apply the "clean transparent" filter, if needed - if (m_setting_mipmap || m_setting_bilinear_filter || - m_setting_trilinear_filter || m_setting_anisotropic_filter) - imageCleanTransparent(baseimg, 127); - - /* Upscale textures to user's requested minimum size. This is a trick to make - * filters look as good on low-res textures as on high-res ones, by making - * low-res textures BECOME high-res ones. This is helpful for worlds that - * mix high- and low-res textures, or for mods with least-common-denominator - * textures that don't have the resources to offer high-res alternatives. - */ - const bool filter = m_setting_trilinear_filter || m_setting_bilinear_filter; - const s32 scaleto = filter ? g_settings->getU16("texture_min_size") : 1; - if (scaleto > 1) { - const core::dimension2d dim = baseimg->getDimension(); - - /* Calculate scaling needed to make the shortest texture dimension - * equal to the target minimum. If e.g. this is a vertical frames - * animation, the short dimension will be the real size. - */ - u32 xscale = scaleto / dim.Width; - u32 yscale = scaleto / dim.Height; - const s32 scale = std::max(xscale, yscale); - - // Never downscale; only scale up by 2x or more. - if (scale > 1) { - u32 w = scale * dim.Width; - u32 h = scale * dim.Height; - const core::dimension2d newdim(w, h); - video::IImage *newimg = driver->createImage( - baseimg->getColorFormat(), newdim); - baseimg->copyToScaling(newimg); - baseimg->drop(); - baseimg = newimg; - } - } - } - /* - [resize:WxH - Resizes the base image to the given dimensions - */ - else if (str_starts_with(part_of_name, "[resize")) - { - CHECK_BASEIMG(); - - Strfnd sf(part_of_name); - sf.next(":"); - u32 width = stoi(sf.next("x")); - u32 height = stoi(sf.next("")); - CHECK_DIM(width, height); - - video::IImage *image = driver-> - createImage(video::ECF_A8R8G8B8, {width, height}); - baseimg->copyToScaling(image); - baseimg->drop(); - baseimg = image; - } - /* - [opacity:R - Makes the base image transparent according to the given ratio. - R must be between 0 and 255. - 0 means totally transparent. - 255 means totally opaque. - */ - else if (str_starts_with(part_of_name, "[opacity:")) { - CHECK_BASEIMG(); - - Strfnd sf(part_of_name); - sf.next(":"); - - u32 ratio = mystoi(sf.next(""), 0, 255); - - core::dimension2d dim = baseimg->getDimension(); - - for (u32 y = 0; y < dim.Height; y++) - for (u32 x = 0; x < dim.Width; x++) - { - video::SColor c = baseimg->getPixel(x, y); - c.setAlpha(floor((c.getAlpha() * ratio) / 255 + 0.5)); - baseimg->setPixel(x, y, c); - } - } - /* - [invert:mode - Inverts the given channels of the base image. - Mode may contain the characters "r", "g", "b", "a". - Only the channels that are mentioned in the mode string - will be inverted. - */ - else if (str_starts_with(part_of_name, "[invert:")) { - CHECK_BASEIMG(); - - Strfnd sf(part_of_name); - sf.next(":"); - - std::string mode = sf.next(""); - u32 mask = 0; - if (mode.find('a') != std::string::npos) - mask |= 0xff000000UL; - if (mode.find('r') != std::string::npos) - mask |= 0x00ff0000UL; - if (mode.find('g') != std::string::npos) - mask |= 0x0000ff00UL; - if (mode.find('b') != std::string::npos) - mask |= 0x000000ffUL; - - core::dimension2d dim = baseimg->getDimension(); - - for (u32 y = 0; y < dim.Height; y++) - for (u32 x = 0; x < dim.Width; x++) - { - video::SColor c = baseimg->getPixel(x, y); - c.color ^= mask; - baseimg->setPixel(x, y, c); - } - } - /* - [sheet:WxH:X,Y - Retrieves a tile at position X,Y (in tiles) - from the base image it assumes to be a - tilesheet with dimensions W,H (in tiles). - */ - else if (str_starts_with(part_of_name, "[sheet:")) { - CHECK_BASEIMG(); - - Strfnd sf(part_of_name); - sf.next(":"); - u32 w0 = stoi(sf.next("x")); - u32 h0 = stoi(sf.next(":")); - u32 x0 = stoi(sf.next(",")); - u32 y0 = stoi(sf.next(":")); - - CHECK_DIM(w0, h0); - if (x0 >= w0 || y0 >= h0) - COMPLAIN_INVALID("tile position (X,Y)"); - - core::dimension2d img_dim = baseimg->getDimension(); - core::dimension2d tile_dim(v2u32(img_dim) / v2u32(w0, h0)); - if (tile_dim.Width == 0) - tile_dim.Width = 1; - if (tile_dim.Height == 0) - tile_dim.Height = 1; - - video::IImage *img = driver->createImage( - video::ECF_A8R8G8B8, tile_dim); - img->fill(video::SColor(0,0,0,0)); - - v2u32 vdim(tile_dim); - core::rect rect(v2s32(x0 * vdim.X, y0 * vdim.Y), tile_dim); - baseimg->copyToWithAlpha(img, v2s32(0), rect, - video::SColor(255,255,255,255), NULL); - - // Replace baseimg - baseimg->drop(); - baseimg = img; - } - /* - [png:base64 - Decodes a PNG image in base64 form. - Use minetest.encode_png and minetest.encode_base64 - to produce a valid string. - */ - else if (str_starts_with(part_of_name, "[png:")) { - std::string png; - { - auto blob = part_of_name.substr(5); - if (!base64_is_valid(blob)) { - errorstream << "generateImagePart(): " - << "malformed base64 in [png" << std::endl; - return false; - } - png = base64_decode(blob); - } - - auto *device = RenderingEngine::get_raw_device(); - auto *fs = device->getFileSystem(); - auto *vd = device->getVideoDriver(); - auto *memfile = fs->createMemoryReadFile(png.data(), png.size(), "__temp_png"); - video::IImage* pngimg = vd->createImageFromFile(memfile); - memfile->drop(); - - if (!pngimg) { - errorstream << "generateImagePart(): Invalid PNG data" << std::endl; - return false; - } - - if (baseimg) { - blitBaseImage(pngimg, baseimg); - } else { - core::dimension2d dim = pngimg->getDimension(); - baseimg = driver->createImage(video::ECF_A8R8G8B8, dim); - pngimg->copyTo(baseimg); - } - pngimg->drop(); - } - /* - [hsl:hue:saturation:lightness - or - [colorizehsl:hue:saturation:lightness - - Adjust the hue, saturation, and lightness of the base image. Like - "Hue-Saturation" in GIMP, but with 0 as the mid-point. - Hue should be from -180 to +180, though 0 to 360 is also supported. - Saturation and lightness are optional, with lightness from -100 to - +100, and sauration from -100 to +100-or-higher. - - If colorize is true then saturation is from 0 to 100, and the image - will be converted to a grayscale image as though seen through a - colored glass, like "Colorize" in GIMP. - */ - else if (str_starts_with(part_of_name, "[hsl:") || - str_starts_with(part_of_name, "[colorizehsl:")) { - - CHECK_BASEIMG(); - - bool colorize = str_starts_with(part_of_name, "[colorizehsl:"); - - // saturation range is 0 to 100 when colorize is true - s32 defaultSaturation = colorize ? 50 : 0; - - Strfnd sf(part_of_name); - sf.next(":"); - s32 hue = mystoi(sf.next(":"), -180, 360); - s32 saturation = sf.at_end() ? defaultSaturation : mystoi(sf.next(":"), -100, 1000); - s32 lightness = sf.at_end() ? 0 : mystoi(sf.next(":"), -100, 100); - - - apply_hue_saturation(baseimg, v2u32(0, 0), baseimg->getDimension(), - hue, saturation, lightness, colorize); - } - /* - [overlay:filename - or - [hardlight:filename - - "A.png^[hardlight:B.png" is the same as "B.png^[overlay:A.Png" - - Applies an Overlay or Hard Light blend between two images, like the - layer modes of the same names in GIMP. - Overlay combines Multiply and Screen blend modes. The parts of the - top layer where the base layer is light become lighter, the parts - where the base layer is dark become darker. Areas where the base - layer are mid grey are unaffected. An overlay with the same picture - looks like an S-curve. - - Swapping the top layer and base layer is a Hard Light blend - */ - else if (str_starts_with(part_of_name, "[overlay:") || - str_starts_with(part_of_name, "[hardlight:")) { - - CHECK_BASEIMG(); - - Strfnd sf(part_of_name); - sf.next(":"); - std::string filename = unescape_string(sf.next_esc(":", escape), escape); - - video::IImage *img = generateImage(filename, source_image_names); - if (img) { - upscaleImagesToMatchLargest(baseimg, img); - - bool hardlight = str_starts_with(part_of_name, "[hardlight:"); - apply_overlay(img, baseimg, v2s32(0, 0), v2s32(0, 0), - img->getDimension(), hardlight); - img->drop(); - } else { - errorstream << "generateImage(): Failed to load image \"" - << filename << "\" for [overlay or [hardlight" << std::endl; - } - } - /* - [contrast:C:B - - Adjust the brightness and contrast of the base image. Conceptually - like GIMP's "Brightness-Contrast" feature but allows brightness to - be wound all the way up to white or down to black. - C and B are both values from -127 to +127. - B is optional. - */ - else if (str_starts_with(part_of_name, "[contrast:")) { - - CHECK_BASEIMG(); - - Strfnd sf(part_of_name); - sf.next(":"); - s32 contrast = mystoi(sf.next(":"), -127, 127); - s32 brightness = sf.at_end() ? 0 : mystoi(sf.next(":"), -127, 127); - - apply_brightness_contrast(baseimg, v2u32(0, 0), - baseimg->getDimension(), brightness, contrast); - } - else - { - errorstream << "generateImagePart(): Invalid " - " modification: \"" << part_of_name << "\"" << std::endl; - } - } - - return true; -} - -#undef CHECK_BASEIMG - -#undef COMPLAIN_INVALID - -#undef CHECK_DIM - - -namespace { - -/** Calculate the color of a single pixel drawn on top of another pixel without - * gamma correction - * - * The color mixing is a little more complicated than just - * video::SColor::getInterpolated because getInterpolated does not handle alpha - * correctly. - * For example, a pixel with alpha=64 drawn atop a pixel with alpha=128 should - * yield a pixel with alpha=160, while getInterpolated would yield alpha=96. - * - * \tparam overlay If enabled, only modify dst_col if it is fully opaque - * \param src_col Color of the top pixel - * \param dst_col Color of the bottom pixel. This color is modified in-place to - * store the result. -*/ -template -void blit_pixel(video::SColor src_col, video::SColor &dst_col) -{ - u8 dst_a = (u8)dst_col.getAlpha(); - if constexpr (overlay) { - if (dst_a != 255) - // The bottom pixel has transparency -> do nothing - return; - } - u8 src_a = (u8)src_col.getAlpha(); - if (src_a == 0) { - // A fully transparent pixel is on top -> do nothing - return; - } - if (src_a == 255 || dst_a == 0) { - // The top pixel is fully opaque or the bottom pixel is - // fully transparent -> replace the color - dst_col = src_col; - return; - } - struct Color { u8 r, g, b; }; - Color src{(u8)src_col.getRed(), (u8)src_col.getGreen(), - (u8)src_col.getBlue()}; - Color dst{(u8)dst_col.getRed(), (u8)dst_col.getGreen(), - (u8)dst_col.getBlue()}; - if (dst_a == 255) { - // A semi-transparent pixel is on top and an opaque one in - // the bottom -> lerp r, g, and b - dst.r = (dst.r * (255 - src_a) + src.r * src_a) / 255; - dst.g = (dst.g * (255 - src_a) + src.g * src_a) / 255; - dst.b = (dst.b * (255 - src_a) + src.b * src_a) / 255; - dst_col.set(255, dst.r, dst.g, dst.b); - return; - } - // A semi-transparent pixel is on top of a - // semi-transparent pixel -> general alpha compositing - u16 a_new_255 = src_a * 255 + (255 - src_a) * dst_a; - dst.r = (dst.r * (255 - src_a) * dst_a + src.r * src_a * 255) / a_new_255; - dst.g = (dst.g * (255 - src_a) * dst_a + src.g * src_a * 255) / a_new_255; - dst.b = (dst.b * (255 - src_a) * dst_a + src.b * src_a * 255) / a_new_255; - dst_a = (a_new_255 + 127) / 255; - dst_col.set(dst_a, dst.r, dst.g, dst.b); -} - -} // namespace - -template -void blit_with_alpha(video::IImage *src, video::IImage *dst, v2s32 dst_pos, - v2u32 size) -{ - if (dst->getColorFormat() != video::ECF_A8R8G8B8) - throw BaseException("blit_with_alpha() supports only ECF_A8R8G8B8 " - "destination images."); - - core::dimension2d src_dim = src->getDimension(); - core::dimension2d dst_dim = dst->getDimension(); - bool drop_src = false; - if (src->getColorFormat() != video::ECF_A8R8G8B8) { - video::IVideoDriver *driver = RenderingEngine::get_video_driver(); - video::IImage *src_converted = driver->createImage(video::ECF_A8R8G8B8, - src_dim); - if (!src_converted) - throw BaseException("blit_with_alpha() failed to convert the " - "source image to ECF_A8R8G8B8."); - src->copyTo(src_converted); - src = src_converted; - drop_src = true; - } - video::SColor *pixels_src = - reinterpret_cast(src->getData()); - video::SColor *pixels_dst = - reinterpret_cast(dst->getData()); - // Limit y and x to the overlapping ranges - // s.t. the positions are all in bounds after offsetting. - u32 x_start = (u32)std::max(0, -dst_pos.X); - u32 y_start = (u32)std::max(0, -dst_pos.Y); - u32 x_end = (u32)std::min({size.X, src_dim.Width, - dst_dim.Width - (s64)dst_pos.X}); - u32 y_end = (u32)std::min({size.Y, src_dim.Height, - dst_dim.Height - (s64)dst_pos.Y}); - for (u32 y0 = y_start; y0 < y_end; ++y0) { - size_t i_src = y0 * src_dim.Width + x_start; - size_t i_dst = (dst_pos.Y + y0) * dst_dim.Width + dst_pos.X + x_start; - for (u32 x0 = x_start; x0 < x_end; ++x0) { - blit_pixel(pixels_src[i_src++], pixels_dst[i_dst++]); - } - } - if (drop_src) - src->drop(); -} - -/* - Apply color to destination, using a weighted interpolation blend -*/ -static void apply_colorize(video::IImage *dst, v2u32 dst_pos, v2u32 size, - const video::SColor color, int ratio, bool keep_alpha) -{ - u32 alpha = color.getAlpha(); - video::SColor dst_c; - if ((ratio == -1 && alpha == 255) || ratio == 255) { // full replacement of color - if (keep_alpha) { // replace the color with alpha = dest alpha * color alpha - dst_c = color; - for (u32 y = dst_pos.Y; y < dst_pos.Y + size.Y; y++) - for (u32 x = dst_pos.X; x < dst_pos.X + size.X; x++) { - u32 dst_alpha = dst->getPixel(x, y).getAlpha(); - if (dst_alpha > 0) { - dst_c.setAlpha(dst_alpha * alpha / 255); - dst->setPixel(x, y, dst_c); - } - } - } else { // replace the color including the alpha - for (u32 y = dst_pos.Y; y < dst_pos.Y + size.Y; y++) - for (u32 x = dst_pos.X; x < dst_pos.X + size.X; x++) - if (dst->getPixel(x, y).getAlpha() > 0) - dst->setPixel(x, y, color); - } - } else { // interpolate between the color and destination - float interp = (ratio == -1 ? color.getAlpha() / 255.0f : ratio / 255.0f); - for (u32 y = dst_pos.Y; y < dst_pos.Y + size.Y; y++) - for (u32 x = dst_pos.X; x < dst_pos.X + size.X; x++) { - dst_c = dst->getPixel(x, y); - if (dst_c.getAlpha() > 0) { - dst_c = color.getInterpolated(dst_c, interp); - dst->setPixel(x, y, dst_c); - } - } - } -} - -/* - Apply color to destination, using a Multiply blend mode -*/ -static void apply_multiplication(video::IImage *dst, v2u32 dst_pos, v2u32 size, - const video::SColor color) -{ - video::SColor dst_c; - - for (u32 y = dst_pos.Y; y < dst_pos.Y + size.Y; y++) - for (u32 x = dst_pos.X; x < dst_pos.X + size.X; x++) { - dst_c = dst->getPixel(x, y); - dst_c.set( - dst_c.getAlpha(), - (dst_c.getRed() * color.getRed()) / 255, - (dst_c.getGreen() * color.getGreen()) / 255, - (dst_c.getBlue() * color.getBlue()) / 255 - ); - dst->setPixel(x, y, dst_c); - } -} - -/* - Apply color to destination, using a Screen blend mode -*/ -static void apply_screen(video::IImage *dst, v2u32 dst_pos, v2u32 size, - const video::SColor color) -{ - video::SColor dst_c; - - for (u32 y = dst_pos.Y; y < dst_pos.Y + size.Y; y++) - for (u32 x = dst_pos.X; x < dst_pos.X + size.X; x++) { - dst_c = dst->getPixel(x, y); - dst_c.set( - dst_c.getAlpha(), - 255 - ((255 - dst_c.getRed()) * (255 - color.getRed())) / 255, - 255 - ((255 - dst_c.getGreen()) * (255 - color.getGreen())) / 255, - 255 - ((255 - dst_c.getBlue()) * (255 - color.getBlue())) / 255 - ); - dst->setPixel(x, y, dst_c); - } -} - -/* - Adjust the hue, saturation, and lightness of destination. Like - "Hue-Saturation" in GIMP, but with 0 as the mid-point. - Hue should be from -180 to +180, or from 0 to 360. - Saturation and Lightness are percentages. - Lightness is from -100 to +100. - Saturation goes down to -100 (fully desaturated) but can go above 100, - allowing for even muted colors to become saturated. - - If colorize is true then saturation is from 0 to 100, and destination will - be converted to a grayscale image as seen through a colored glass, like - "Colorize" in GIMP. -*/ -static void apply_hue_saturation(video::IImage *dst, v2u32 dst_pos, v2u32 size, - s32 hue, s32 saturation, s32 lightness, bool colorize) -{ - video::SColorf colorf; - video::SColorHSL hsl; - f32 norm_s = core::clamp(saturation, -100, 1000) / 100.0f; - f32 norm_l = core::clamp(lightness, -100, 100) / 100.0f; - - if (colorize) { - hsl.Saturation = core::clamp((f32)saturation, 0.0f, 100.0f); - } - - for (u32 y = dst_pos.Y; y < dst_pos.Y + size.Y; y++) - for (u32 x = dst_pos.X; x < dst_pos.X + size.X; x++) { - - if (colorize) { - f32 lum = dst->getPixel(x, y).getLuminance() / 255.0f; - - if (norm_l < 0) { - lum *= norm_l + 1.0f; - } else { - lum = lum * (1.0f - norm_l) + norm_l; - } - hsl.Hue = 0; - hsl.Luminance = lum * 100; - - } else { - // convert the RGB to HSL - colorf = video::SColorf(dst->getPixel(x, y)); - hsl.fromRGB(colorf); - - if (norm_l < 0) { - hsl.Luminance *= norm_l + 1.0f; - } else{ - hsl.Luminance = hsl.Luminance + norm_l * (100.0f - hsl.Luminance); - } - - // Adjusting saturation in the same manner as lightness resulted in - // muted colors being affected too much and bright colors not - // affected enough, so I'm borrowing a leaf out of gimp's book and - // using a different scaling approach for saturation. - // https://github.com/GNOME/gimp/blob/6cc1e035f1822bf5198e7e99a53f7fa6e281396a/app/operations/gimpoperationhuesaturation.c#L139-L145= - // This difference is why values over 100% are not necessary for - // lightness but are very useful with saturation. An alternative UI - // approach would be to have an upper saturation limit of 100, but - // multiply positive values by ~3 to make it a more useful positive - // range scale. - hsl.Saturation *= norm_s + 1.0f; - hsl.Saturation = core::clamp(hsl.Saturation, 0.0f, 100.0f); - } - - // Apply the specified HSL adjustments - hsl.Hue = fmod(hsl.Hue + hue, 360); - if (hsl.Hue < 0) - hsl.Hue += 360; - - // Convert back to RGB - hsl.toRGB(colorf); - dst->setPixel(x, y, colorf.toSColor()); - } -} - - -/* - Apply an Overlay blend to destination - If hardlight is true then swap the dst & blend images (a hardlight blend) -*/ -static void apply_overlay(video::IImage *blend, video::IImage *dst, - v2s32 blend_pos, v2s32 dst_pos, v2u32 size, bool hardlight) -{ - video::IImage *blend_layer = hardlight ? dst : blend; - video::IImage *base_layer = hardlight ? blend : dst; - v2s32 blend_layer_pos = hardlight ? dst_pos : blend_pos; - v2s32 base_layer_pos = hardlight ? blend_pos : dst_pos; - - for (u32 y = 0; y < size.Y; y++) - for (u32 x = 0; x < size.X; x++) { - s32 base_x = x + base_layer_pos.X; - s32 base_y = y + base_layer_pos.Y; - - video::SColor blend_c = - blend_layer->getPixel(x + blend_layer_pos.X, y + blend_layer_pos.Y); - video::SColor base_c = base_layer->getPixel(base_x, base_y); - double blend_r = blend_c.getRed() / 255.0; - double blend_g = blend_c.getGreen() / 255.0; - double blend_b = blend_c.getBlue() / 255.0; - double base_r = base_c.getRed() / 255.0; - double base_g = base_c.getGreen() / 255.0; - double base_b = base_c.getBlue() / 255.0; - - base_c.set( - base_c.getAlpha(), - // Do a Multiply blend if less that 0.5, otherwise do a Screen blend - (u32)((base_r < 0.5 ? 2 * base_r * blend_r : 1 - 2 * (1 - base_r) * (1 - blend_r)) * 255), - (u32)((base_g < 0.5 ? 2 * base_g * blend_g : 1 - 2 * (1 - base_g) * (1 - blend_g)) * 255), - (u32)((base_b < 0.5 ? 2 * base_b * blend_b : 1 - 2 * (1 - base_b) * (1 - blend_b)) * 255) - ); - dst->setPixel(base_x, base_y, base_c); - } -} - -/* - Adjust the brightness and contrast of the base image. - - Conceptually like GIMP's "Brightness-Contrast" feature but allows brightness to be - wound all the way up to white or down to black. -*/ -static void apply_brightness_contrast(video::IImage *dst, v2u32 dst_pos, v2u32 size, - s32 brightness, s32 contrast) -{ - video::SColor dst_c; - // Only allow normalized contrast to get as high as 127/128 to avoid infinite slope. - // (we could technically allow -128/128 here as that would just result in 0 slope) - double norm_c = core::clamp(contrast, -127, 127) / 128.0; - double norm_b = core::clamp(brightness, -127, 127) / 127.0; - - // Scale brightness so its range is -127.5 to 127.5, otherwise brightness - // adjustments will outputs values from 0.5 to 254.5 instead of 0 to 255. - double scaled_b = brightness * 127.5 / 127; - - // Calculate a contrast slope such that that no colors will get clamped due - // to the brightness setting. - // This allows the texture modifier to used as a brightness modifier without - // the user having to calculate a contrast to avoid clipping at that brightness. - double slope = 1 - fabs(norm_b); - - // Apply the user's contrast adjustment to the calculated slope, such that - // -127 will make it near-vertical and +127 will make it horizontal - double angle = atan(slope); - angle += norm_c <= 0 - ? norm_c * angle // allow contrast slope to be lowered to 0 - : norm_c * (M_PI_2 - angle); // allow contrast slope to be raised almost vert. - slope = tan(angle); - - double c = slope <= 1 - ? -slope * 127.5 + 127.5 + scaled_b // shift up/down when slope is horiz. - : -slope * (127.5 - scaled_b) + 127.5; // shift left/right when slope is vert. - - // add 0.5 to c so that when the final result is cast to int, it is effectively - // rounded rather than trunc'd. - c += 0.5; - - for (u32 y = dst_pos.Y; y < dst_pos.Y + size.Y; y++) - for (u32 x = dst_pos.X; x < dst_pos.X + size.X; x++) { - dst_c = dst->getPixel(x, y); - - dst_c.set( - dst_c.getAlpha(), - core::clamp((int)(slope * dst_c.getRed() + c), 0, 255), - core::clamp((int)(slope * dst_c.getGreen() + c), 0, 255), - core::clamp((int)(slope * dst_c.getBlue() + c), 0, 255) - ); - dst->setPixel(x, y, dst_c); - } -} - -/* - Apply mask to destination -*/ -static void apply_mask(video::IImage *mask, video::IImage *dst, - v2s32 mask_pos, v2s32 dst_pos, v2u32 size) -{ - for (u32 y0 = 0; y0 < size.Y; y0++) { - for (u32 x0 = 0; x0 < size.X; x0++) { - s32 mask_x = x0 + mask_pos.X; - s32 mask_y = y0 + mask_pos.Y; - s32 dst_x = x0 + dst_pos.X; - s32 dst_y = y0 + dst_pos.Y; - video::SColor mask_c = mask->getPixel(mask_x, mask_y); - video::SColor dst_c = dst->getPixel(dst_x, dst_y); - dst_c.color &= mask_c.color; - dst->setPixel(dst_x, dst_y, dst_c); - } - } -} - -video::IImage *create_crack_image(video::IImage *crack, s32 frame_index, - core::dimension2d size, u8 tiles, video::IVideoDriver *driver) -{ - core::dimension2d strip_size = crack->getDimension(); - - if (tiles == 0 || strip_size.getArea() == 0) - return nullptr; - - core::dimension2d frame_size(strip_size.Width, strip_size.Width); - core::dimension2d tile_size(size / tiles); - s32 frame_count = strip_size.Height / strip_size.Width; - if (frame_index >= frame_count) - frame_index = frame_count - 1; - core::rect frame(v2s32(0, frame_index * frame_size.Height), frame_size); - video::IImage *result = nullptr; - - // extract crack frame - video::IImage *crack_tile = driver->createImage(video::ECF_A8R8G8B8, tile_size); - if (!crack_tile) - return nullptr; - if (tile_size == frame_size) { - crack->copyTo(crack_tile, v2s32(0, 0), frame); - } else { - video::IImage *crack_frame = driver->createImage(video::ECF_A8R8G8B8, frame_size); - if (!crack_frame) - goto exit__has_tile; - crack->copyTo(crack_frame, v2s32(0, 0), frame); - crack_frame->copyToScaling(crack_tile); - crack_frame->drop(); - } - if (tiles == 1) - return crack_tile; - - // tile it - result = driver->createImage(video::ECF_A8R8G8B8, size); - if (!result) - goto exit__has_tile; - result->fill({}); - for (u8 i = 0; i < tiles; i++) - for (u8 j = 0; j < tiles; j++) - crack_tile->copyTo(result, v2s32(i * tile_size.Width, j * tile_size.Height)); - -exit__has_tile: - crack_tile->drop(); - return result; -} - -static void draw_crack(video::IImage *crack, video::IImage *dst, - bool use_overlay, s32 frame_count, s32 progression, - video::IVideoDriver *driver, u8 tiles) -{ - // Dimension of destination image - core::dimension2d dim_dst = dst->getDimension(); - // Limit frame_count - if (frame_count > (s32) dim_dst.Height) - frame_count = dim_dst.Height; - if (frame_count < 1) - frame_count = 1; - // Dimension of the scaled crack stage, - // which is the same as the dimension of a single destination frame - core::dimension2d frame_size( - dim_dst.Width, - dim_dst.Height / frame_count - ); - video::IImage *crack_scaled = create_crack_image(crack, progression, - frame_size, tiles, driver); - if (!crack_scaled) - return; - - auto blit = use_overlay ? blit_with_alpha : blit_with_alpha; - for (s32 i = 0; i < frame_count; ++i) { - v2s32 dst_pos(0, frame_size.Height * i); - blit(crack_scaled, dst, dst_pos, frame_size); - } - - crack_scaled->drop(); -} - -void brighten(video::IImage *image) -{ - if (image == NULL) - return; - - core::dimension2d dim = image->getDimension(); - - for (u32 y=0; ygetPixel(x,y); - c.setRed(0.5 * 255 + 0.5 * (float)c.getRed()); - c.setGreen(0.5 * 255 + 0.5 * (float)c.getGreen()); - c.setBlue(0.5 * 255 + 0.5 * (float)c.getBlue()); - image->setPixel(x,y,c); - } -} - -u32 parseImageTransform(std::string_view s) -{ - int total_transform = 0; - - std::string transform_names[8]; - transform_names[0] = "i"; - transform_names[1] = "r90"; - transform_names[2] = "r180"; - transform_names[3] = "r270"; - transform_names[4] = "fx"; - transform_names[6] = "fy"; - - std::size_t pos = 0; - while(pos < s.size()) - { - int transform = -1; - for (int i = 0; i <= 7; ++i) - { - const std::string &name_i = transform_names[i]; - - if (s[pos] == ('0' + i)) - { - transform = i; - pos++; - break; - } - - if (!(name_i.empty()) && lowercase(s.substr(pos, name_i.size())) == name_i) { - transform = i; - pos += name_i.size(); - break; - } - } - if (transform < 0) - break; - - // Multiply total_transform and transform in the group D4 - int new_total = 0; - if (transform < 4) - new_total = (transform + total_transform) % 4; - else - new_total = (transform - total_transform + 8) % 4; - if ((transform >= 4) ^ (total_transform >= 4)) - new_total += 4; - - total_transform = new_total; - } - return total_transform; -} - -core::dimension2d imageTransformDimension(u32 transform, core::dimension2d dim) -{ - if (transform % 2 == 0) - return dim; - - return core::dimension2d(dim.Height, dim.Width); -} - -void imageTransform(u32 transform, video::IImage *src, video::IImage *dst) -{ - if (src == NULL || dst == NULL) - return; - - core::dimension2d dstdim = dst->getDimension(); - - // Pre-conditions - assert(dstdim == imageTransformDimension(transform, src->getDimension())); - assert(transform <= 7); - - /* - Compute the transformation from source coordinates (sx,sy) - to destination coordinates (dx,dy). - */ - int sxn = 0; - int syn = 2; - if (transform == 0) // identity - sxn = 0, syn = 2; // sx = dx, sy = dy - else if (transform == 1) // rotate by 90 degrees ccw - sxn = 3, syn = 0; // sx = (H-1) - dy, sy = dx - else if (transform == 2) // rotate by 180 degrees - sxn = 1, syn = 3; // sx = (W-1) - dx, sy = (H-1) - dy - else if (transform == 3) // rotate by 270 degrees ccw - sxn = 2, syn = 1; // sx = dy, sy = (W-1) - dx - else if (transform == 4) // flip x - sxn = 1, syn = 2; // sx = (W-1) - dx, sy = dy - else if (transform == 5) // flip x then rotate by 90 degrees ccw - sxn = 2, syn = 0; // sx = dy, sy = dx - else if (transform == 6) // flip y - sxn = 0, syn = 3; // sx = dx, sy = (H-1) - dy - else if (transform == 7) // flip y then rotate by 90 degrees ccw - sxn = 3, syn = 1; // sx = (H-1) - dy, sy = (W-1) - dx - - for (u32 dy=0; dygetPixel(sx,sy); - dst->setPixel(dx,dy,c); - } -} - video::ITexture* TextureSource::getNormalTexture(const std::string &name) { if (isKnownSourceImage("override_normal.png")) @@ -2455,48 +572,6 @@ video::ITexture* TextureSource::getNormalTexture(const std::string &name) return NULL; } -namespace { - // For more colorspace transformations, see for example - // https://github.com/tobspr/GLSL-Color-Spaces/blob/master/ColorSpaces.inc.glsl - - inline float linear_to_srgb_component(float v) - { - if (v > 0.0031308f) - return 1.055f * powf(v, 1.0f / 2.4f) - 0.055f; - return 12.92f * v; - } - inline float srgb_to_linear_component(float v) - { - if (v > 0.04045f) - return powf((v + 0.055f) / 1.055f, 2.4f); - return v / 12.92f; - } - - v3f srgb_to_linear(const video::SColor col_srgb) - { - v3f col(col_srgb.getRed(), col_srgb.getGreen(), col_srgb.getBlue()); - col /= 255.0f; - col.X = srgb_to_linear_component(col.X); - col.Y = srgb_to_linear_component(col.Y); - col.Z = srgb_to_linear_component(col.Z); - return col; - } - - video::SColor linear_to_srgb(const v3f col_linear) - { - v3f col; - col.X = linear_to_srgb_component(col_linear.X); - col.Y = linear_to_srgb_component(col_linear.Y); - col.Z = linear_to_srgb_component(col_linear.Z); - col *= 255.0f; - col.X = core::clamp(col.X, 0.0f, 255.0f); - col.Y = core::clamp(col.Y, 0.0f, 255.0f); - col.Z = core::clamp(col.Z, 0.0f, 255.0f); - return video::SColor(0xff, myround(col.X), myround(col.Y), - myround(col.Z)); - } -} - video::SColor TextureSource::getTextureAverageColor(const std::string &name) { video::IVideoDriver *driver = RenderingEngine::get_video_driver(); @@ -2510,27 +585,9 @@ video::SColor TextureSource::getTextureAverageColor(const std::string &name) if (!image) return c; - u32 total = 0; - v3f col_acc(0, 0, 0); - core::dimension2d dim = image->getDimension(); - u16 step = 1; - if (dim.Width > 16) - step = dim.Width / 16; - for (u16 x = 0; x < dim.Width; x += step) { - for (u16 y = 0; y < dim.Width; y += step) { - c = image->getPixel(x,y); - if (c.getAlpha() > 0) { - total++; - col_acc += srgb_to_linear(c); - } - } - } + c = ImageSource::getImageAverageColor(*image); image->drop(); - if (total > 0) { - col_acc /= total; - c = linear_to_srgb(col_acc); - } - c.setAlpha(255); + return c; }