Lucas de Vries
138 lines
4.3 KiB
C++
138 lines
4.3 KiB
C++
#include "gl_framebuffer.h"
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#include "main/logging.h"
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#include "main/references.h"
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namespace render {
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class DummyTexture : public Texture {
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GLuint glName;
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public:
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DummyTexture(GLuint name) : glName(name) {
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type = TT_2D;
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hasMipMaps = false;
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loaded = true;
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}
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virtual bool isPixelActive(vec2i px) const { return false; }
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virtual void loadStart(Image& image, bool mipmap = true, bool cachePixels = false, unsigned lod = 0) {}
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virtual void loadPartial(Image& image, const recti& pixels, bool cachePixels = false, unsigned lod = 0) {}
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virtual void loadFinish(bool mipmap, unsigned lod = 0) {}
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virtual void load(Image& image, bool mipmap = true, bool cachePixels = false) {}
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virtual void save(Image& image) const {}
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virtual void bind() { glBindTexture(GL_TEXTURE_2D, glName); }
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virtual unsigned getID() const { return glName; }
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virtual unsigned getTextureBytes() const { return 0; }
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};
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glFrameBuffer::glFrameBuffer(const vec2i& Size) {
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devices.render->reportErrors();
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type = TT_2D;
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loaded = true;
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size = Size;
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hasMipMaps = false;
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glGenFramebuffers(1, &buffer);
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glBindFramebuffer(GL_FRAMEBUFFER, buffer);
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prevRenderState.filterMin = TF_Nearest;
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prevRenderState.filterMag = TF_Nearest;
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textures = new GLuint[2];
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glGenTextures(2, textures);
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glBindTexture(GL_TEXTURE_2D, textures[0]);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, Size.width, Size.height, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glBindTexture(GL_TEXTURE_2D, 0);
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glBindTexture(GL_TEXTURE_2D, textures[1]);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, Size.width, Size.height, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, 0);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_NONE);
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glBindTexture(GL_TEXTURE_2D, 0);
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devices.render->reportErrors("setting framebuffer parameters");
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textures[0], 0);
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devices.render->reportErrors("creating framebuffer color attachment");
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renderBuffers = new GLuint[1];
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//glGenRenderbuffers(1, renderBuffers);
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//glBindRenderbuffer(GL_RENDERBUFFER, renderBuffers[0]);
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//glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, Size.width, Size.height);
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//glBindRenderbuffer(GL_RENDERBUFFER, 0);
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//glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, renderBuffers[0]);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, textures[1], 0);
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depthTexture = new DummyTexture(textures[1]);
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devices.render->reportErrors("creating framebuffer depth attachment");
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auto state = glCheckFramebufferStatus(GL_FRAMEBUFFER);
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if(state != GL_FRAMEBUFFER_COMPLETE)
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error("Incomplete framebuffer: %d", state);
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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}
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glFrameBuffer::~glFrameBuffer() {
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glDeleteFramebuffers(1, &buffer);
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glDeleteTextures(2, textures); delete[] textures;
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//glDeleteRenderbuffers(1, renderBuffers);
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delete[] renderBuffers;
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delete depthTexture;
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}
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void glFrameBuffer::bind() {
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glBindTexture(GL_TEXTURE_2D, textures[0]);
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}
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unsigned glFrameBuffer::getID() const {
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return textures[0];
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}
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void glFrameBuffer::setAsTarget() {
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glBindFramebuffer(GL_DRAW_FRAMEBUFFER, buffer);
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glViewport(0,0,size.width, size.height);
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}
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void glFrameBuffer::save(Image& image) const {
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image.resize(size.width, size.height, FMT_RGB);
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glBindTexture(GL_TEXTURE_2D, textures[0]);
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glGetTexImage(GL_TEXTURE_2D, 0, GL_RGB, GL_UNSIGNED_BYTE, image.rgb);
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}
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void glFrameBuffer::load(Image& img, bool mipmap, bool cachePixels) {
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throw "Cannot load framebuffer from image.";
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}
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void glFrameBuffer::loadStart(Image& image, bool mipmap, bool cachePixels, unsigned lod) {
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throw "Cannot load framebuffer from image.";
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}
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void glFrameBuffer::loadPartial(Image& image, const recti& pixels, bool cachePixels, unsigned lod) {
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throw "Cannot load framebuffer from image.";
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}
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void glFrameBuffer::loadFinish(bool mipmap, unsigned lod) {
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throw "Cannot load framebuffer from image.";
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}
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bool glFrameBuffer::isPixelActive(vec2i px) const {
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throw "Cannot get framebuffer pixels.";
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}
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unsigned glFrameBuffer::getTextureBytes() const {
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//4 bytes for RGBA, 3 bytes for 24 bit z buffer
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return size.width * size.height * 7;
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}
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};
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