bool LLRenderTarget::allocateDepth()
{
if (mStencil)
{
//use render buffers where stencil buffers are in play
glGenRenderbuffers(1, (GLuint *) &mDepth);
glBindRenderbuffer(GL_RENDERBUFFER, mDepth);
stop_glerror();
clear_glerror();
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, mResX, mResY);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
}
else
{
LLImageGL::generateTextures(1, &mDepth);
gGL.getTexUnit(0)->bindManual(mUsage, mDepth);
U32 internal_type = LLTexUnit::getInternalType(mUsage);
stop_glerror();
clear_glerror();
LLImageGL::setManualImage(internal_type, 0, GL_DEPTH_COMPONENT24, mResX, mResY, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, NULL, false);
gGL.getTexUnit(0)->setTextureFilteringOption(LLTexUnit::TFO_POINT);
}
sBytesAllocated += mResX*mResY*4;
if (glGetError() != GL_NO_ERROR)
{
llwarns << "Unable to allocate depth buffer for render target." << llendl;
return false;
}
return true;
}
bool LLMultisampleBuffer::allocateDepth()
{
glGenRenderbuffers(1, (GLuint* ) &mDepth);
glBindRenderbuffer(GL_RENDERBUFFER, mDepth);
stop_glerror();
clear_glerror();
if (mStencil)
{
glRenderbufferStorageMultisample(GL_RENDERBUFFER, mSamples, GL_DEPTH24_STENCIL8, mResX, mResY);
}
else
{
glRenderbufferStorageMultisample(GL_RENDERBUFFER, mSamples, GL_DEPTH_COMPONENT24, mResX, mResY);
}
if (glGetError() != GL_NO_ERROR)
{
llwarns << "Unable to allocate depth buffer for multisample render target." << llendl;
return false;
}
sBytesAllocated += mResX*mResY*4;
return true;
}
bool LLMultisampleBuffer::addColorAttachment(U32 color_fmt)
{
if (color_fmt == 0)
{
return true;
}
U32 offset = mTex.size();
if (offset >= 4 ||
(offset > 0 && (mFBO == 0 || !gGLManager.mHasDrawBuffers)))
{
llerrs << "Too many color attachments!" << llendl;
}
U32 tex;
glGenRenderbuffers(1, &tex);
glBindRenderbuffer(GL_RENDERBUFFER, tex);
stop_glerror();
clear_glerror();
glRenderbufferStorageMultisample(GL_RENDERBUFFER, mSamples, color_fmt, mResX, mResY);
if (glGetError() != GL_NO_ERROR)
{
llwarns << "Unable to allocate color buffer for multisample render target." << llendl;
release();
return false;
}
sBytesAllocated += mResX*mResY*4;
if (mFBO)
{
glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0+offset, GL_RENDERBUFFER, tex);
check_framebuffer_status();
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
mTex.push_back(tex);
return true;
}
bool LLRenderTarget::addColorAttachment(U32 color_fmt)
{
if (color_fmt == 0)
{
return true;
}
U32 offset = mTex.size();
if (offset >= 4 ||
(offset > 0 && (mFBO == 0 || !gGLManager.mHasDrawBuffers)))
{
llerrs << "Too many color attachments!" << llendl;
}
U32 tex;
LLImageGL::generateTextures(1, &tex);
gGL.getTexUnit(0)->bindManual(mUsage, tex);
stop_glerror();
{
clear_glerror();
LLImageGL::setManualImage(LLTexUnit::getInternalType(mUsage), 0, color_fmt, mResX, mResY, GL_RGBA, GL_UNSIGNED_BYTE, NULL, false);
if (glGetError() != GL_NO_ERROR)
{
llwarns << "Could not allocate color buffer for render target." << llendl;
return false;
}
}
sBytesAllocated += mResX*mResY*4;
stop_glerror();
if (offset == 0)
{ //use bilinear filtering on single texture render targets that aren't multisampled
gGL.getTexUnit(0)->setTextureFilteringOption(LLTexUnit::TFO_BILINEAR);
stop_glerror();
}
else
{ //don't filter data attachments
gGL.getTexUnit(0)->setTextureFilteringOption(LLTexUnit::TFO_POINT);
stop_glerror();
}
if (mUsage != LLTexUnit::TT_RECT_TEXTURE)
{
gGL.getTexUnit(0)->setTextureAddressMode(LLTexUnit::TAM_MIRROR);
stop_glerror();
}
else
{
// ATI doesn't support mirrored repeat for rectangular textures.
gGL.getTexUnit(0)->setTextureAddressMode(LLTexUnit::TAM_CLAMP);
stop_glerror();
}
if (mFBO)
{
stop_glerror();
glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0+offset,
LLTexUnit::getInternalType(mUsage), tex, 0);
stop_glerror();
check_framebuffer_status();
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
mTex.push_back(tex);
if (gDebugGL)
{ //bind and unbind to validate target
bindTarget();
flush();
}
return true;
}
bool LLMultisampleBuffer::allocate(U32 resx, U32 resy, U32 color_fmt, bool depth, bool stencil, LLTexUnit::eTextureType usage, bool use_fbo, U32 samples )
{
release();
stop_glerror();
if (!gGLManager.mHasFramebufferMultisample || !gGLManager.mHasFramebufferObject || !(sUseFBO || use_fbo))
return false;
if(color_fmt != GL_RGBA)
{
llwarns << "Unsupported color format: " << color_fmt << llendl;
return false;
}
//Restrict to valid sample count
{
mSamples = samples;
//mSamples = llmin(mSamples, (U32)4); //Cap to prevent memory bloat.
mSamples = llmin(mSamples, (U32) gGLManager.mMaxSamples);
}
if (mSamples <= 1)
return false;
mResX = resx;
mResY = resy;
mUsage = usage;
mUseDepth = depth;
mStencil = stencil;
mColorFormat = color_fmt;
{
if (depth)
{
stop_glerror();
if(!allocateDepth())
{
release();
return false;
}
stop_glerror();
}
glGenFramebuffers(1, (GLuint *) &mFBO);
glBindFramebuffer(GL_FRAMEBUFFER, mFBO);
stop_glerror();
clear_glerror();
if (mDepth)
{
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, mDepth);
if (mStencil)
{
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, mDepth);
}
}
stop_glerror();
glBindFramebuffer(GL_FRAMEBUFFER, 0);
stop_glerror();
}
return addColorAttachment(color_fmt);
}
