66 lines
2.4 KiB
C++
66 lines
2.4 KiB
C++
#include "TextureAnimation.h"
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#include "Texture.h"
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#include "Framebuffer.h"
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#include <GL/glew.h>
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#include <unordered_set>
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TextureAnimator::TextureAnimator() {
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glGenFramebuffers(1, &fboR);
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glGenFramebuffers(1, &fboD);
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}
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TextureAnimator::~TextureAnimator() {
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glDeleteFramebuffers(1, &fboR);
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glDeleteFramebuffers(1, &fboD);
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}
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void TextureAnimator::addAnimations(const std::vector<TextureAnimation>& animations) {
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for (const auto& elem : animations) {
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addAnimation(elem);
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}
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}
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void TextureAnimator::update(float delta) {
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std::unordered_set<uint> changedTextures;
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for (auto& elem : animations) {
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elem.timer += delta;
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size_t frameNum = elem.currentFrame;
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Frame frame = elem.frames[elem.currentFrame];
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while (elem.timer >= frame.duration) {
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elem.timer -= frame.duration;
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elem.currentFrame++;
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if (elem.currentFrame >= elem.frames.size()) elem.currentFrame = 0;
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frame = elem.frames[elem.currentFrame];
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}
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if (frameNum != elem.currentFrame){
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if (changedTextures.find(elem.dstTexture->id) == changedTextures.end()) changedTextures.insert(elem.dstTexture->id);
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glBindFramebuffer(GL_FRAMEBUFFER, fboD);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, elem.dstTexture->id, 0);
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glBindFramebuffer(GL_FRAMEBUFFER, fboR);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, elem.srcTexture->id, 0);
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fboD);
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glBindFramebuffer(GL_READ_FRAMEBUFFER, fboR);
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float srcPosY = elem.srcTexture->height - frame.size.y - frame.srcPos.y; // vertical flip
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glBlitFramebuffer(frame.srcPos.x, srcPosY, frame.srcPos.x + frame.size.x, srcPosY + frame.size.y,
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frame.dstPos.x, frame.dstPos.y, frame.dstPos.x + frame.size.x, frame.dstPos.y + frame.size.y,
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GL_COLOR_BUFFER_BIT, GL_NEAREST);
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}
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glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
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glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
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}
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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for (auto& elem : changedTextures) {
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glBindTexture(GL_TEXTURE_2D, elem);
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glGenerateMipmap(GL_TEXTURE_2D);
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}
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glBindTexture(GL_TEXTURE_2D, 0);
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}
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