CachedTexture * DepthBuffer::resolveDepthBufferTexture(FrameBuffer * _pBuffer)
{
#ifdef GL_MULTISAMPLING_SUPPORT
if (config.video.multisampling == 0)
return m_pDepthBufferTexture;
if (m_resolved)
return m_pResolveDepthBufferTexture;
glScissor(0, 0, m_pDepthBufferTexture->realWidth, m_pDepthBufferTexture->realHeight);
glBindFramebuffer(GL_READ_FRAMEBUFFER, _pBuffer->m_FBO);
glReadBuffer(GL_COLOR_ATTACHMENT0);
GLuint attachment = GL_COLOR_ATTACHMENT0;
glDrawBuffers(1, &attachment);
assert(checkFBO());
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, _pBuffer->m_resolveFBO);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, m_pResolveDepthBufferTexture->glName, 0);
assert(checkFBO());
glBlitFramebuffer(
0, 0, m_pDepthBufferTexture->realWidth, m_pDepthBufferTexture->realHeight,
0, 0, m_pResolveDepthBufferTexture->realWidth, m_pResolveDepthBufferTexture->realHeight,
GL_DEPTH_BUFFER_BIT, GL_NEAREST
);
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, _pBuffer->m_FBO);
m_resolved = true;
gDP.changed |= CHANGED_SCISSOR;
return m_pResolveDepthBufferTexture;
#else
return m_pDepthBufferTexture;
#endif
}
void createFrameBuffer(FrameBuffer &fb, bool depth) {
// Create the color render buffer
glGenTextures(1, &fb.texture);
glBindTexture(GL_TEXTURE_2D, fb.texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, fb.bufferSize.x , fb.bufferSize.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glBindTexture(GL_TEXTURE_2D, 0);
checkError("Creation of the color texture for the FBO");
// Create the depth render buffer
if (depth) {
glGenRenderbuffersEXT(1, &fb.depth);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, fb.depth);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, fb.bufferSize.x, fb.bufferSize.y);
checkError("Creation of the depth renderbuffer for the FBO");
}
else {
fb.depth = 0;
}
// Create the FBO
glGenFramebuffersEXT(1, &fb.fbo);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb.fbo);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, fb.texture, 0);
if (depth) {
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, fb.depth);
}
checkFBO();
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
checkError("Creation of the FBO");
}
static
void _initFBO(GLuint _FBO, CachedTexture * _pTexture)
{
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, _FBO);
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, _pTexture->glName, 0);
assert(checkFBO());
}
static
GLuint _createFBO(CachedTexture * _pTexture)
{
GLuint FBO;
glGenFramebuffers(1, &FBO);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, FBO);
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, _pTexture->glName, 0);
assert(checkFBO());
return FBO;
}
void VSMPerPixelRenderer::reshape(int w,int h)
{
DefaultRenderer::reshape(w,h);
release();
for(int i=0; i<MAX_LIGHTS; i++) {
genTexture(_tid[i],w,h,GL_DEPTH_COMPONENT,GL_DEPTH_COMPONENT,GL_UNSIGNED_BYTE);
genTexture(_ctid[i],w,h,GL_RGB32F_ARB,GL_RGB,GL_FLOAT,GL_LINEAR);
//create a framebuffer object
glGenFramebuffersEXT(1,&(_fboId[i]));
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT,_fboId[i]);
//Instruct openGL that we won't bind a color texture with the currently binded FBO
//glDrawBuffer(GL_NONE);
//glReadBuffer(GL_NONE);
//attach the texture to FBO depth attachment point
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,GL_DEPTH_ATTACHMENT_EXT,GL_TEXTURE_2D,_tid[i],0);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,GL_COLOR_ATTACHMENT0_EXT,GL_TEXTURE_2D,_ctid[i],0);
checkFBO();
//switch back to window-system-provided framebuffer
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT,0);
}
{
genTexture(_ctTmp,w,h,GL_RGB32F_ARB,GL_RGB,GL_FLOAT,GL_LINEAR);
//create a framebuffer object
glGenFramebuffersEXT(1,&_fboTmp);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT,_fboTmp);
//Instruct openGL that we won't bind a color texture with the currently binded FBO
//glDrawBuffer(GL_NONE);
//glReadBuffer(GL_NONE);
//attach the texture to FBO depth attachment point
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,GL_COLOR_ATTACHMENT0_EXT,GL_TEXTURE_2D,_ctTmp,0);
checkFBO();
//switch back to window-system-provided framebuffer
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT,0);
}
_released=false;
}
void FrameBufferObject::init(unsigned int width, unsigned height)
{
if (!initialized)
{
this->width = width;
this->height = height;
glGenFramebuffersEXT(1, &id);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, id);
if(enableDepth)
{
createDepthBuffer();
initDepthBuffer();
//choice between rendering depth into a texture or a renderbuffer
if(depthTexture)
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, depthTextureID, 0);
else
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, depthTextureID);
}
if(enableColor)
{
createColorBuffer();
initColorBuffer();
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, colorTextureID, 0);
}
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_defaultWindowFramebufferID);
if(enableColor)
{
glDrawBuffer(GL_BACK);
glReadBuffer(GL_BACK);;
}
#ifdef _DEBUG
checkFBO();
#endif
initialized=true;
glDisable(GL_TEXTURE_2D);
}
else
setSize(width, height);
}
