mirror of https://github.com/minetest/minetest.git
84 lines
2.8 KiB
C++
84 lines
2.8 KiB
C++
#include "guiAnimatedImage.h"
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#include "client/guiscalingfilter.h"
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#include "client/tile.h" // ITextureSource
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#include "log.h"
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#include "porting.h"
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#include <string>
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GUIAnimatedImage::GUIAnimatedImage(gui::IGUIEnvironment *env, gui::IGUIElement *parent,
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s32 id, const core::rect<s32> &rectangle, const std::string &name,
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ISimpleTextureSource *tsrc) :
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gui::IGUIElement(gui::EGUIET_ELEMENT, env, parent, id, rectangle),
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m_name(name), m_tsrc(tsrc), m_texture(nullptr), m_global_time(0),
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m_frame_idx(0), m_frame_count(1), m_frame_duration(1), m_frame_time(0)
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{
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// Expected format: "texture_name:frame_count,frame_duration"
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// If this format is not met, the string will be loaded as a normal texture
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std::string::size_type colon_position = name.find(':', 0);
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std::string::size_type comma_position = name.find(',', 0);
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if (comma_position != std::string::npos &&
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colon_position != std::string::npos &&
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comma_position < name.size()) {
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m_texture = m_tsrc->getTexture(name.substr(0, colon_position));
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m_frame_count = std::max(stoi(name.substr(
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colon_position + 1, comma_position - colon_position - 1)), 1);
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m_frame_duration = std::max(stoi(name.substr(comma_position + 1)), 1);
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} else {
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// Leave the count/duration and display a static image
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m_texture = m_tsrc->getTexture(name);
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errorstream << "animated_image[]: Invalid texture format " << name <<
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". Expected format: texture_name:frame_count,frame_duration" << std::endl;
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}
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if (m_texture != nullptr) {
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core::dimension2d<u32> size = m_texture->getOriginalSize();
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if (size.Height < (u64)m_frame_count) {
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m_frame_count = size.Height;
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}
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} else {
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// No need to step an animation if we have nothing to draw
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m_frame_count = 1;
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}
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}
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void GUIAnimatedImage::draw()
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{
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// Render the current frame
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if (m_texture != nullptr) {
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video::IVideoDriver *driver = Environment->getVideoDriver();
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const video::SColor color(255, 255, 255, 255);
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const video::SColor colors[] = {color, color, color, color};
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core::dimension2d<u32> size = m_texture->getOriginalSize();
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size.Height /= m_frame_count;
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draw2DImageFilterScaled( driver, m_texture, AbsoluteRect,
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core::rect<s32>(core::position2d<s32>(0, size.Height * m_frame_idx), size),
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NoClip ? nullptr : &AbsoluteClippingRect, colors, true);
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}
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// Step the animation
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if (m_frame_count > 1) {
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// Determine the delta time to step
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u64 new_global_time = porting::getTimeMs();
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if (m_global_time > 0)
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m_frame_time += new_global_time - m_global_time;
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m_global_time = new_global_time;
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// Advance by the number of elapsed frames, looping if necessary
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m_frame_idx += u32(m_frame_time / m_frame_duration);
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m_frame_idx %= m_frame_count;
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// If 1 or more frames have elapsed, reset the frame time counter with
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// the remainder
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m_frame_time %= m_frame_duration;
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}
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}
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