//! Notice - 0 is not power of two here
static inline bool isPowerOfTwo (const GLsizei theNumber)
{
- return !(theNumber & (theNumber - 1));
+ return !(theNumber & (theNumber - 1));
}
// =======================================================================
// purpose :
// =======================================================================
OpenGl_FrameBuffer::OpenGl_FrameBuffer (GLint theTextureFormat)
-: mySizeX (0),
- mySizeY (0),
- myVPSizeX (0),
+: myVPSizeX (0),
myVPSizeY (0),
myTextFormat (theTextureFormat),
- myGlTextureId (NO_TEXTURE),
myGlFBufferId (NO_FRAMEBUFFER),
- myGlDepthRBId (NO_RENDERBUFFER),
- myGlStencilRBId (NO_RENDERBUFFER)
+ myColorTexture (new OpenGl_Texture()),
+ myDepthStencilTexture (new OpenGl_Texture())
{
//
}
// =======================================================================
Standard_Boolean OpenGl_FrameBuffer::Init (const Handle(OpenGl_Context)& theGlContext,
const GLsizei theViewportSizeX,
- const GLsizei theViewportSizeY,
- const GLboolean toForcePowerOfTwo)
+ const GLsizei theViewportSizeY)
{
if (theGlContext->arbFBO == NULL)
{
// clean up previous state
Release (theGlContext.operator->());
- // upscale width/height if numbers are odd
- if (toForcePowerOfTwo)
- {
- mySizeX = OpenGl_Context::GetPowerOfTwo (theViewportSizeX, theGlContext->MaxTextureSize());
- mySizeY = OpenGl_Context::GetPowerOfTwo (theViewportSizeY, theGlContext->MaxTextureSize());
- }
- else
- {
- mySizeX = getEvenNumber (theViewportSizeX);
- mySizeY = getEvenNumber (theViewportSizeY);
- }
-
// setup viewport sizes as is
myVPSizeX = theViewportSizeX;
myVPSizeY = theViewportSizeY;
- // Create the texture (will be used as color buffer)
- if (!initTrashTexture (theGlContext))
+ // Create the textures (will be used as color buffer and depth-stencil buffer)
+ if (!initTrashTextures (theGlContext))
{
- if (!isPowerOfTwo (mySizeX) || !isPowerOfTwo (mySizeY))
- {
- return Init (theGlContext, theViewportSizeX, theViewportSizeY, GL_TRUE);
- }
Release (theGlContext.operator->());
return Standard_False;
}
- if (!theGlContext->extPDS)
- {
- // Create RenderBuffer to be used as depth buffer
- theGlContext->arbFBO->glGenRenderbuffers (1, &myGlDepthRBId);
- theGlContext->arbFBO->glBindRenderbuffer (GL_RENDERBUFFER, myGlDepthRBId);
- theGlContext->arbFBO->glRenderbufferStorage (GL_RENDERBUFFER, GL_DEPTH_COMPONENT, mySizeX, mySizeY);
-
- // Create RenderBuffer to be used as stencil buffer
- theGlContext->arbFBO->glGenRenderbuffers (1, &myGlStencilRBId);
- theGlContext->arbFBO->glBindRenderbuffer (GL_RENDERBUFFER, myGlStencilRBId);
- theGlContext->arbFBO->glRenderbufferStorage (GL_RENDERBUFFER, GL_STENCIL_INDEX, mySizeX, mySizeY);
- }
- else
- {
- // Create combined depth stencil buffer
- theGlContext->arbFBO->glGenRenderbuffers (1, &myGlDepthRBId);
- theGlContext->arbFBO->glBindRenderbuffer (GL_RENDERBUFFER, myGlDepthRBId);
- theGlContext->arbFBO->glRenderbufferStorage (GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, mySizeX, mySizeY);
- myGlStencilRBId = myGlDepthRBId;
- }
-
// Build FBO and setup it as texture
theGlContext->arbFBO->glGenFramebuffers (1, &myGlFBufferId);
theGlContext->arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, myGlFBufferId);
- glEnable (GL_TEXTURE_2D);
- glBindTexture (GL_TEXTURE_2D, myGlTextureId);
- theGlContext->arbFBO->glFramebufferTexture2D (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, myGlTextureId, 0);
- theGlContext->arbFBO->glFramebufferRenderbuffer (GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, myGlDepthRBId);
- theGlContext->arbFBO->glFramebufferRenderbuffer (GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, myGlStencilRBId);
+ theGlContext->arbFBO->glFramebufferTexture2D (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+ GL_TEXTURE_2D, myColorTexture->TextureId(), 0);
+ theGlContext->arbFBO->glFramebufferTexture2D (GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
+ GL_TEXTURE_2D, myDepthStencilTexture->TextureId(), 0);
if (theGlContext->arbFBO->glCheckFramebufferStatus (GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
{
- if (!isPowerOfTwo (mySizeX) || !isPowerOfTwo (mySizeY))
- {
- return Init (theGlContext, theViewportSizeX, theViewportSizeY, GL_TRUE);
- }
Release (theGlContext.operator->());
return Standard_False;
}
- UnbindBuffer (theGlContext);
- UnbindTexture (theGlContext);
- theGlContext->arbFBO->glBindRenderbuffer (GL_RENDERBUFFER, NO_RENDERBUFFER);
+ UnbindBuffer (theGlContext);
return Standard_True;
}
// =======================================================================
void OpenGl_FrameBuffer::Release (const OpenGl_Context* theGlCtx)
{
- if (isValidDepthBuffer()
- || isValidStencilBuffer()
- || isValidTexture()
- || isValidFrameBuffer())
+ if (isValidFrameBuffer())
{
// application can not handle this case by exception - this is bug in code
Standard_ASSERT_RETURN (theGlCtx != NULL,
"OpenGl_FrameBuffer destroyed without GL context! Possible GPU memory leakage...",);
- }
- if (isValidStencilBuffer())
- {
- if (theGlCtx->IsValid()
- && myGlStencilRBId != myGlDepthRBId)
- {
- theGlCtx->arbFBO->glDeleteRenderbuffers (1, &myGlStencilRBId);
- }
- myGlStencilRBId = NO_RENDERBUFFER;
- }
- if (isValidDepthBuffer())
- {
- if (theGlCtx->IsValid())
- {
- theGlCtx->arbFBO->glDeleteRenderbuffers (1, &myGlDepthRBId);
- }
- myGlDepthRBId = NO_RENDERBUFFER;
- }
- if (isValidTexture())
- {
- if (theGlCtx->IsValid())
- {
- glDeleteTextures (1, &myGlTextureId);
- }
- myGlTextureId = NO_TEXTURE;
- }
- mySizeX = mySizeY = myVPSizeX = myVPSizeY = 0;
- if (isValidFrameBuffer())
- {
if (theGlCtx->IsValid())
{
theGlCtx->arbFBO->glDeleteFramebuffers (1, &myGlFBufferId);
}
myGlFBufferId = NO_FRAMEBUFFER;
}
-}
-// =======================================================================
-// function : isProxySuccess
-// purpose :
-// =======================================================================
-Standard_Boolean OpenGl_FrameBuffer::isProxySuccess() const
-{
- // use proxy to check texture could be created or not
- glTexImage2D (GL_PROXY_TEXTURE_2D,
- 0, // LOD number: 0 - base image level; n is the nth mipmap reduction image
- myTextFormat, // internalformat
- mySizeX, mySizeY, 0,
- GL_RGBA, GL_UNSIGNED_BYTE, NULL);
- GLint aTestParamX (0), aTestParamY (0);
- glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestParamX);
- glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestParamY);
- return aTestParamX != 0 && aTestParamY != 0;
+ myColorTexture->Release (theGlCtx);
+ myDepthStencilTexture->Release (theGlCtx);
}
// =======================================================================
// function : initTrashTexture
// purpose :
// =======================================================================
-Standard_Boolean OpenGl_FrameBuffer::initTrashTexture (const Handle(OpenGl_Context)& theGlContext)
+Standard_Boolean OpenGl_FrameBuffer::initTrashTextures (const Handle(OpenGl_Context)& theGlContext)
{
- // Check texture size is fit dimension maximum
- GLint aMaxTexDim = 2048;
- glGetIntegerv (GL_MAX_TEXTURE_SIZE, &aMaxTexDim);
- if (mySizeX > aMaxTexDim || mySizeY > aMaxTexDim)
- {
- return Standard_False;
- }
-
- // generate new id
- glEnable (GL_TEXTURE_2D);
- if (!isValidTexture())
- {
- glGenTextures (1, &myGlTextureId); // Create The Texture
- }
- glBindTexture (GL_TEXTURE_2D, myGlTextureId);
-
- // texture interpolation parameters - could be overridden later
- glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-
- if (!isProxySuccess())
- {
- Release (theGlContext.operator->());
- return Standard_False;
- }
-
- glTexImage2D (GL_TEXTURE_2D,
- 0, // LOD number: 0 - base image level; n is the nth mipmap reduction image
- myTextFormat, // internalformat
- mySizeX, mySizeY, 0,
- GL_RGBA, GL_UNSIGNED_BYTE, NULL); // NULL pointer supported from OpenGL 1.1
- return Standard_True;
+ return myColorTexture->Init (theGlContext, myTextFormat,
+ GL_RGBA, GL_UNSIGNED_BYTE,
+ myVPSizeX, myVPSizeY, Graphic3d_TOT_2D)
+ && myDepthStencilTexture->Init (theGlContext, GL_DEPTH24_STENCIL8,
+ GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8,
+ myVPSizeX, myVPSizeY, Graphic3d_TOT_2D);
}
// =======================================================================
{
theGlCtx->arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, NO_FRAMEBUFFER);
}
-
-// =======================================================================
-// function : BindTexture
-// purpose :
-// =======================================================================
-void OpenGl_FrameBuffer::BindTexture (const Handle(OpenGl_Context)& /*theGlCtx*/)
-{
- glEnable (GL_TEXTURE_2D); // needed only for fixed pipeline rendering
- glBindTexture (GL_TEXTURE_2D, myGlTextureId);
-}
-
-// =======================================================================
-// function : UnbindTexture
-// purpose :
-// =======================================================================
-void OpenGl_FrameBuffer::UnbindTexture (const Handle(OpenGl_Context)& /*theGlCtx*/)
-{
- glBindTexture (GL_TEXTURE_2D, NO_TEXTURE);
- glDisable (GL_TEXTURE_2D); // needed only for fixed pipeline rendering
-}
projects / occt.git / blobdiff