irrlicht/source/Irrlicht/COpenGLCoreTexture.h

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// Copyright (C) 2015 Patryk Nadrowski
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#ifndef __C_OGLCORE_TEXTURE_H_INCLUDED__
#define __C_OGLCORE_TEXTURE_H_INCLUDED__
#include "irrArray.h"
#include "SMaterialLayer.h"
#include "ITexture.h"
#include "EDriverFeatures.h"
#include "os.h"
#include "CImage.h"
#include "CColorConverter.h"
// Check if GL version we compile with should have the glGenerateMipmap function.
#if defined(GL_VERSION_3_0) || defined(GL_ES_VERSION_2_0)
#define IRR_OPENGL_HAS_glGenerateMipmap
#endif
namespace irr
{
namespace video
{
template <class TOpenGLDriver>
class COpenGLCoreTexture : public ITexture
{
public:
struct SStatesCache
{
SStatesCache() : WrapU(ETC_REPEAT), WrapV(ETC_REPEAT), WrapW(ETC_REPEAT),
LODBias(0), AnisotropicFilter(0), BilinearFilter(false), TrilinearFilter(false),
MipMapStatus(false), IsCached(false)
{
}
u8 WrapU;
u8 WrapV;
u8 WrapW;
s8 LODBias;
u8 AnisotropicFilter;
bool BilinearFilter;
bool TrilinearFilter;
bool MipMapStatus;
bool IsCached;
};
COpenGLCoreTexture(const io::path& name, const core::array<IImage*>& images, E_TEXTURE_TYPE type, TOpenGLDriver* driver) : ITexture(name, type), Driver(driver), TextureType(GL_TEXTURE_2D),
TextureName(0), InternalFormat(GL_RGBA), PixelFormat(GL_RGBA), PixelType(GL_UNSIGNED_BYTE), Converter(0), LockReadOnly(false), LockImage(0), LockLayer(0),
KeepImage(false), MipLevelStored(0), LegacyAutoGenerateMipMaps(false)
{
_IRR_DEBUG_BREAK_IF(images.size() == 0)
DriverType = Driver->getDriverType();
TextureType = TextureTypeIrrToGL(Type);
HasMipMaps = Driver->getTextureCreationFlag(ETCF_CREATE_MIP_MAPS);
KeepImage = Driver->getTextureCreationFlag(ETCF_ALLOW_MEMORY_COPY);
getImageValues(images[0]);
const core::array<IImage*>* tmpImages = &images;
if (KeepImage || OriginalSize != Size || OriginalColorFormat != ColorFormat)
{
Images.set_used(images.size());
for (u32 i = 0; i < images.size(); ++i)
{
Images[i] = Driver->createImage(ColorFormat, Size);
if (images[i]->getDimension() == Size)
images[i]->copyTo(Images[i]);
else
images[i]->copyToScaling(Images[i]);
if ( images[i]->getMipMapsData() )
{
if ( OriginalSize == Size && OriginalColorFormat == ColorFormat )
{
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Images[i]->setMipMapsData( images[i]->getMipMapsData(), false);
}
else
{
// TODO: handle at least mipmap with changing color format
os::Printer::log("COpenGLCoreTexture: Can't handle format changes for mipmap data. Mipmap data dropped", ELL_WARNING);
}
}
}
tmpImages = &Images;
}
glGenTextures(1, &TextureName);
const COpenGLCoreTexture* prevTexture = Driver->getCacheHandler()->getTextureCache().get(0);
Driver->getCacheHandler()->getTextureCache().set(0, this);
glTexParameteri(TextureType, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(TextureType, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
#ifdef GL_GENERATE_MIPMAP_HINT
if (HasMipMaps)
{
if (Driver->getTextureCreationFlag(ETCF_OPTIMIZED_FOR_SPEED))
glHint(GL_GENERATE_MIPMAP_HINT, GL_FASTEST);
else if (Driver->getTextureCreationFlag(ETCF_OPTIMIZED_FOR_QUALITY))
glHint(GL_GENERATE_MIPMAP_HINT, GL_NICEST);
else
glHint(GL_GENERATE_MIPMAP_HINT, GL_DONT_CARE);
}
#endif
#if !defined(IRR_OPENGL_HAS_glGenerateMipmap) && defined(GL_GENERATE_MIPMAP)
if (HasMipMaps)
{
LegacyAutoGenerateMipMaps = Driver->getTextureCreationFlag(ETCF_AUTO_GENERATE_MIP_MAPS) &&
Driver->queryFeature(EVDF_MIP_MAP_AUTO_UPDATE);
glTexParameteri(TextureType, GL_GENERATE_MIPMAP, LegacyAutoGenerateMipMaps ? GL_TRUE : GL_FALSE);
}
#endif
for (u32 i = 0; i < (*tmpImages).size(); ++i)
uploadTexture(true, i, 0, (*tmpImages)[i]->getData());
if (HasMipMaps && !LegacyAutoGenerateMipMaps)
{
// Create mipmaps (either from image mipmaps or generate them)
for (u32 i = 0; i < (*tmpImages).size(); ++i)
{
void* mipmapsData = (*tmpImages)[i]->getMipMapsData();
regenerateMipMapLevels(mipmapsData, i);
}
}
if (!KeepImage)
{
for (u32 i = 0; i < Images.size(); ++i)
Images[i]->drop();
Images.clear();
}
Driver->getCacheHandler()->getTextureCache().set(0, prevTexture);
Driver->testGLError(__LINE__);
}
COpenGLCoreTexture(const io::path& name, const core::dimension2d<u32>& size, E_TEXTURE_TYPE type, ECOLOR_FORMAT format, TOpenGLDriver* driver)
: ITexture(name, type),
Driver(driver), TextureType(GL_TEXTURE_2D),
TextureName(0), InternalFormat(GL_RGBA), PixelFormat(GL_RGBA), PixelType(GL_UNSIGNED_BYTE), Converter(0), LockReadOnly(false), LockImage(0), LockLayer(0), KeepImage(false),
MipLevelStored(0), LegacyAutoGenerateMipMaps(false)
{
DriverType = Driver->getDriverType();
TextureType = TextureTypeIrrToGL(Type);
HasMipMaps = false;
IsRenderTarget = true;
OriginalColorFormat = format;
if (ECF_UNKNOWN == OriginalColorFormat)
ColorFormat = getBestColorFormat(Driver->getColorFormat());
else
ColorFormat = OriginalColorFormat;
OriginalSize = size;
Size = OriginalSize;
Pitch = Size.Width * IImage::getBitsPerPixelFromFormat(ColorFormat) / 8;
if ( !Driver->getColorFormatParameters(ColorFormat, InternalFormat, PixelFormat, PixelType, &Converter) )
{
os::Printer::log("COpenGLCoreTexture: Color format is not supported", ColorFormatNames[ColorFormat < ECF_UNKNOWN?ColorFormat:ECF_UNKNOWN], ELL_ERROR);
}
glGenTextures(1, &TextureName);
const COpenGLCoreTexture* prevTexture = Driver->getCacheHandler()->getTextureCache().get(0);
Driver->getCacheHandler()->getTextureCache().set(0, this);
glTexParameteri(TextureType, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(TextureType, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(TextureType, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(TextureType, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
#if defined(GL_VERSION_1_2)
glTexParameteri(TextureType, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
#endif
StatesCache.WrapU = ETC_CLAMP_TO_EDGE;
StatesCache.WrapV = ETC_CLAMP_TO_EDGE;
StatesCache.WrapW = ETC_CLAMP_TO_EDGE;
switch (Type)
{
case ETT_2D:
glTexImage2D(GL_TEXTURE_2D, 0, InternalFormat, Size.Width, Size.Height, 0, PixelFormat, PixelType, 0);
break;
case ETT_CUBEMAP:
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, InternalFormat, Size.Width, Size.Height, 0, PixelFormat, PixelType, 0);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, 0, InternalFormat, Size.Width, Size.Height, 0, PixelFormat, PixelType, 0);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, 0, InternalFormat, Size.Width, Size.Height, 0, PixelFormat, PixelType, 0);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, 0, InternalFormat, Size.Width, Size.Height, 0, PixelFormat, PixelType, 0);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, 0, InternalFormat, Size.Width, Size.Height, 0, PixelFormat, PixelType, 0);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, 0, InternalFormat, Size.Width, Size.Height, 0, PixelFormat, PixelType, 0);
break;
}
Driver->getCacheHandler()->getTextureCache().set(0, prevTexture);
if ( Driver->testGLError(__LINE__) )
{
char msg[256];
snprintf_irr(msg, 256, "COpenGLCoreTexture: InternalFormat:0x%04x PixelFormat:0x%04x", (int)InternalFormat, (int)PixelFormat);
os::Printer::log(msg, ELL_ERROR);
}
}
virtual ~COpenGLCoreTexture()
{
if (TextureName)
glDeleteTextures(1, &TextureName);
if (LockImage)
LockImage->drop();
for (u32 i = 0; i < Images.size(); ++i)
Images[i]->drop();
}
void* lock(E_TEXTURE_LOCK_MODE mode = ETLM_READ_WRITE, u32 mipmapLevel=0, u32 layer = 0, E_TEXTURE_LOCK_FLAGS lockFlags = ETLF_FLIP_Y_UP_RTT) override
{
if (LockImage)
return getLockImageData(MipLevelStored);
if (IImage::isCompressedFormat(ColorFormat))
return 0;
LockReadOnly |= (mode == ETLM_READ_ONLY);
LockLayer = layer;
MipLevelStored = mipmapLevel;
if (KeepImage)
{
_IRR_DEBUG_BREAK_IF(LockLayer > Images.size())
if ( mipmapLevel == 0 || (Images[LockLayer] && Images[LockLayer]->getMipMapsData(mipmapLevel)) )
{
LockImage = Images[LockLayer];
LockImage->grab();
}
}
if ( !LockImage )
{
core::dimension2d<u32> lockImageSize( IImage::getMipMapsSize(Size, MipLevelStored));
// note: we save mipmap data also in the image because IImage doesn't allow saving single mipmap levels to the mipmap data
LockImage = Driver->createImage(ColorFormat, lockImageSize);
if (LockImage && mode != ETLM_WRITE_ONLY)
{
bool passed = true;
#ifdef IRR_COMPILE_GL_COMMON
IImage* tmpImage = LockImage; // not sure yet if the size required by glGetTexImage is always correct, if not we might have to allocate a different tmpImage and convert colors later on.
Driver->getCacheHandler()->getTextureCache().set(0, this);
Driver->testGLError(__LINE__);
GLenum tmpTextureType = TextureType;
if (tmpTextureType == GL_TEXTURE_CUBE_MAP)
{
_IRR_DEBUG_BREAK_IF(layer > 5)
tmpTextureType = GL_TEXTURE_CUBE_MAP_POSITIVE_X + layer;
}
glGetTexImage(tmpTextureType, MipLevelStored, PixelFormat, PixelType, tmpImage->getData());
Driver->testGLError(__LINE__);
if (IsRenderTarget && lockFlags == ETLF_FLIP_Y_UP_RTT)
{
const s32 pitch = tmpImage->getPitch();
u8* srcA = static_cast<u8*>(tmpImage->getData());
u8* srcB = srcA + (tmpImage->getDimension().Height - 1) * pitch;
u8* tmpBuffer = new u8[pitch];
for (u32 i = 0; i < tmpImage->getDimension().Height; i += 2)
{
memcpy(tmpBuffer, srcA, pitch);
memcpy(srcA, srcB, pitch);
memcpy(srcB, tmpBuffer, pitch);
srcA += pitch;
srcB -= pitch;
}
delete[] tmpBuffer;
}
#elif (defined(IRR_COMPILE_GLES2_COMMON) || defined(IRR_COMPILE_GLES_COMMON))
// TODO: on ES2 we can likely also work with glCopyTexImage2D instead of rendering which should be faster.
COpenGLCoreTexture* tmpTexture = new COpenGLCoreTexture("OGL_CORE_LOCK_TEXTURE", Size, ETT_2D, ColorFormat, Driver);
GLuint tmpFBO = 0;
Driver->irrGlGenFramebuffers(1, &tmpFBO);
GLint prevViewportX = 0;
GLint prevViewportY = 0;
GLsizei prevViewportWidth = 0;
GLsizei prevViewportHeight = 0;
Driver->getCacheHandler()->getViewport(prevViewportX, prevViewportY, prevViewportWidth, prevViewportHeight);
Driver->getCacheHandler()->setViewport(0, 0, Size.Width, Size.Height);
GLuint prevFBO = 0;
Driver->getCacheHandler()->getFBO(prevFBO);
Driver->getCacheHandler()->setFBO(tmpFBO);
Driver->irrGlFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tmpTexture->getOpenGLTextureName(), 0);
glClear(GL_COLOR_BUFFER_BIT);
Driver->draw2DImage(this, layer, true);
IImage* tmpImage = Driver->createImage(ECF_A8R8G8B8, Size);
glReadPixels(0, 0, Size.Width, Size.Height, GL_RGBA, GL_UNSIGNED_BYTE, tmpImage->getData());
Driver->getCacheHandler()->setFBO(prevFBO);
Driver->getCacheHandler()->setViewport(prevViewportX, prevViewportY, prevViewportWidth, prevViewportHeight);
Driver->irrGlDeleteFramebuffers(1, &tmpFBO);
delete tmpTexture;
void* src = tmpImage->getData();
void* dest = LockImage->getData();
switch (ColorFormat)
{
case ECF_A1R5G5B5:
CColorConverter::convert_A8R8G8B8toA1B5G5R5(src, tmpImage->getDimension().getArea(), dest);
break;
case ECF_R5G6B5:
CColorConverter::convert_A8R8G8B8toR5G6B5(src, tmpImage->getDimension().getArea(), dest);
break;
case ECF_R8G8B8:
CColorConverter::convert_A8R8G8B8toB8G8R8(src, tmpImage->getDimension().getArea(), dest);
break;
case ECF_A8R8G8B8:
CColorConverter::convert_A8R8G8B8toA8B8G8R8(src, tmpImage->getDimension().getArea(), dest);
break;
default:
passed = false;
break;
}
tmpImage->drop();
#endif
if (!passed)
{
LockImage->drop();
LockImage = 0;
}
}
Driver->testGLError(__LINE__);
}
return (LockImage) ? getLockImageData(MipLevelStored) : 0;
}
void unlock() override
{
if (!LockImage)
return;
if (!LockReadOnly)
{
const COpenGLCoreTexture* prevTexture = Driver->getCacheHandler()->getTextureCache().get(0);
Driver->getCacheHandler()->getTextureCache().set(0, this);
uploadTexture(false, LockLayer, MipLevelStored, getLockImageData(MipLevelStored));
Driver->getCacheHandler()->getTextureCache().set(0, prevTexture);
}
LockImage->drop();
LockReadOnly = false;
LockImage = 0;
LockLayer = 0;
}
void regenerateMipMapLevels(void* data = 0, u32 layer = 0) override
{
if (!HasMipMaps || LegacyAutoGenerateMipMaps || (Size.Width <= 1 && Size.Height <= 1))
return;
const COpenGLCoreTexture* prevTexture = Driver->getCacheHandler()->getTextureCache().get(0);
Driver->getCacheHandler()->getTextureCache().set(0, this);
if (data)
{
u32 width = Size.Width;
u32 height = Size.Height;
u8* tmpData = static_cast<u8*>(data);
u32 dataSize = 0;
u32 level = 0;
do
{
if (width > 1)
width >>= 1;
if (height > 1)
height >>= 1;
dataSize = IImage::getDataSizeFromFormat(ColorFormat, width, height);
++level;
uploadTexture(true, layer, level, tmpData);
tmpData += dataSize;
}
while (width != 1 || height != 1);
}
else
{
#ifdef IRR_OPENGL_HAS_glGenerateMipmap
Driver->irrGlGenerateMipmap(TextureType);
#endif
}
Driver->getCacheHandler()->getTextureCache().set(0, prevTexture);
}
GLenum getOpenGLTextureType() const
{
return TextureType;
}
GLuint getOpenGLTextureName() const
{
return TextureName;
}
SStatesCache& getStatesCache() const
{
return StatesCache;
}
protected:
void * getLockImageData(irr::u32 miplevel) const
{
if ( KeepImage && MipLevelStored > 0
&& LockImage->getMipMapsData(MipLevelStored) )
{
return LockImage->getMipMapsData(MipLevelStored);
}
return LockImage->getData();
}
ECOLOR_FORMAT getBestColorFormat(ECOLOR_FORMAT format)
{
// We only try for to adapt "simple" formats
ECOLOR_FORMAT destFormat = (format <= ECF_A8R8G8B8) ? ECF_A8R8G8B8 : format;
switch (format)
{
case ECF_A1R5G5B5:
if (!Driver->getTextureCreationFlag(ETCF_ALWAYS_32_BIT))
destFormat = ECF_A1R5G5B5;
break;
case ECF_R5G6B5:
if (!Driver->getTextureCreationFlag(ETCF_ALWAYS_32_BIT))
destFormat = ECF_R5G6B5;
break;
case ECF_A8R8G8B8:
if (Driver->getTextureCreationFlag(ETCF_ALWAYS_16_BIT) ||
Driver->getTextureCreationFlag(ETCF_OPTIMIZED_FOR_SPEED))
destFormat = ECF_A1R5G5B5;
break;
case ECF_R8G8B8:
// Note: Using ECF_A8R8G8B8 even when ETCF_ALWAYS_32_BIT is not set as 24 bit textures fail with too many cards
if (Driver->getTextureCreationFlag(ETCF_ALWAYS_16_BIT) || Driver->getTextureCreationFlag(ETCF_OPTIMIZED_FOR_SPEED))
destFormat = ECF_A1R5G5B5;
default:
break;
}
if (Driver->getTextureCreationFlag(ETCF_NO_ALPHA_CHANNEL))
{
switch (destFormat)
{
case ECF_A1R5G5B5:
destFormat = ECF_R5G6B5;
break;
case ECF_A8R8G8B8:
destFormat = ECF_R8G8B8;
break;
default:
break;
}
}
return destFormat;
}
void getImageValues(const IImage* image)
{
OriginalColorFormat = image->getColorFormat();
ColorFormat = getBestColorFormat(OriginalColorFormat);
if ( !Driver->getColorFormatParameters(ColorFormat, InternalFormat, PixelFormat, PixelType, &Converter) )
{
os::Printer::log("getImageValues: Color format is not supported", ColorFormatNames[ColorFormat < ECF_UNKNOWN?ColorFormat:ECF_UNKNOWN], ELL_ERROR);
// not quitting as it will use some alternative internal format
}
if (IImage::isCompressedFormat(image->getColorFormat()))
{
KeepImage = false;
}
OriginalSize = image->getDimension();
Size = OriginalSize;
if (Size.Width == 0 || Size.Height == 0)
{
os::Printer::log("Invalid size of image for texture.", ELL_ERROR);
return;
}
const f32 ratio = (f32)Size.Width / (f32)Size.Height;
if ((Size.Width > Driver->MaxTextureSize) && (ratio >= 1.f))
{
Size.Width = Driver->MaxTextureSize;
Size.Height = (u32)(Driver->MaxTextureSize / ratio);
}
else if (Size.Height > Driver->MaxTextureSize)
{
Size.Height = Driver->MaxTextureSize;
Size.Width = (u32)(Driver->MaxTextureSize * ratio);
}
bool needSquare = (!Driver->queryFeature(EVDF_TEXTURE_NSQUARE) || Type == ETT_CUBEMAP);
Size = Size.getOptimalSize(!Driver->queryFeature(EVDF_TEXTURE_NPOT), needSquare, true, Driver->MaxTextureSize);
Pitch = Size.Width * IImage::getBitsPerPixelFromFormat(ColorFormat) / 8;
}
void uploadTexture(bool initTexture, u32 layer, u32 level, void* data)
{
if (!data)
return;
u32 width = Size.Width >> level;
u32 height = Size.Height >> level;
GLenum tmpTextureType = TextureType;
if (tmpTextureType == GL_TEXTURE_CUBE_MAP)
{
_IRR_DEBUG_BREAK_IF(layer > 5)
tmpTextureType = GL_TEXTURE_CUBE_MAP_POSITIVE_X + layer;
}
if (!IImage::isCompressedFormat(ColorFormat))
{
CImage* tmpImage = 0;
void* tmpData = data;
if (Converter)
{
const core::dimension2d<u32> tmpImageSize(width, height);
tmpImage = new CImage(ColorFormat, tmpImageSize);
tmpData = tmpImage->getData();
Converter(data, tmpImageSize.getArea(), tmpData);
}
switch (TextureType)
{
case GL_TEXTURE_2D:
case GL_TEXTURE_CUBE_MAP:
if (initTexture)
glTexImage2D(tmpTextureType, level, InternalFormat, width, height, 0, PixelFormat, PixelType, tmpData);
else
glTexSubImage2D(tmpTextureType, level, 0, 0, width, height, PixelFormat, PixelType, tmpData);
Driver->testGLError(__LINE__);
break;
default:
break;
}
delete tmpImage;
}
else
{
u32 dataSize = IImage::getDataSizeFromFormat(ColorFormat, width, height);
switch (TextureType)
{
case GL_TEXTURE_2D:
case GL_TEXTURE_CUBE_MAP:
if (initTexture)
Driver->irrGlCompressedTexImage2D(tmpTextureType, level, InternalFormat, width, height, 0, dataSize, data);
else
Driver->irrGlCompressedTexSubImage2D(tmpTextureType, level, 0, 0, width, height, PixelFormat, dataSize, data);
Driver->testGLError(__LINE__);
break;
default:
break;
}
}
}
GLenum TextureTypeIrrToGL(E_TEXTURE_TYPE type) const
{
switch ( type)
{
case ETT_2D:
return GL_TEXTURE_2D;
case ETT_CUBEMAP:
return GL_TEXTURE_CUBE_MAP;
}
os::Printer::log("COpenGLCoreTexture::TextureTypeIrrToGL unknown texture type", ELL_WARNING);
return GL_TEXTURE_2D;
}
TOpenGLDriver* Driver;
GLenum TextureType;
GLuint TextureName;
GLint InternalFormat;
GLenum PixelFormat;
GLenum PixelType;
void (*Converter)(const void*, s32, void*);
bool LockReadOnly;
IImage* LockImage;
u32 LockLayer;
bool KeepImage;
core::array<IImage*> Images;
u8 MipLevelStored;
bool LegacyAutoGenerateMipMaps;
mutable SStatesCache StatesCache;
};
}
}
#endif