103 lines
2.6 KiB
C++
103 lines
2.6 KiB
C++
#include "framebuffer.h"
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#include "texture.h"
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#include "glassert.h"
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#include <iostream>
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const FrameBuffer* FrameBuffer::screen = new FrameBuffer(0);
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FrameBuffer::FrameBuffer() :
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allocated(true)
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{
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glAssert(glGenFramebuffers(1, &fbo));
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}
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FrameBuffer::~FrameBuffer()
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{
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if(allocated)
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glAssert(glDeleteFramebuffers(1, &fbo));
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}
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void FrameBuffer::addTexture(Texture* tex, GLenum attachment)
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{
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if(fbo != 0)
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{
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textures.push_back(tex);
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bindFBO();
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if(tex->isCubeMap())
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{
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// TODO
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// http://cg.siomax.ru/index.php/computer-graphics/10-one-pass-rendering-to-cube-map
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}
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else
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{
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glAssert(glFramebufferTexture2D(GL_FRAMEBUFFER, attachment, tex->getTarget(), tex->getId(), 0));
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if(attachment != GL_DEPTH_ATTACHMENT) // TODO stencil attachment must be tested too
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attachments.push_back(attachment);
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}
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}
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}
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void FrameBuffer::initColorAttachments()
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{
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if(fbo != 0 && attachments.size() != 0)
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{
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bindFBO();
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glAssert(glDrawBuffers(attachments.size(), attachments.data()));
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}
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else
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glAssert(glDrawBuffer(GL_NONE));
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check();
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}
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void FrameBuffer::deleteTextures()
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{
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for(Texture* t : textures)
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delete(t);
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textures.clear();
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}
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void FrameBuffer::bindFBO(GLenum target) const
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{
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glAssert(glBindFramebuffer(target, fbo));
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}
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bool FrameBuffer::check()
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{
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GLenum err;
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glAssert(err = glCheckFramebufferStatus(GL_FRAMEBUFFER));
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if (err != GL_FRAMEBUFFER_COMPLETE) {
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std::cerr << "FBO not complete (error = " << err << ") : ";
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switch (err) {
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case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
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std::cerr << "GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT";
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
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std::cerr << "GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT";
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER:
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std::cerr << "GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER";
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER:
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std::cerr << "GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER";
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break;
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case GL_FRAMEBUFFER_UNSUPPORTED:
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std::cerr << "GL_FRAMEBUFFER_UNSUPPORTED";
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break;
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default:
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std::cerr << "Unknown ERROR";
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}
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std::cerr << std::endl;
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}
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return err == GL_FRAMEBUFFER_COMPLETE;
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}
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Texture* FrameBuffer::getTexture(int texId)
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{
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if(fbo != 0)
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return textures[texId];
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else
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return NULL;
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}
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