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//glew uses iostreams which uses exceptions, so we need to turn off the following warning
//warning C4530: C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc
#pragma warning( disable : 4530 )
/*
Copyright (c) 2005,
Aaron Lefohn (lefohn@cs.ucdavis.edu)
Robert Strzodka (strzodka@stanford.edu)
Adam Moerschell (atmoerschell@ucdavis.edu)
All rights reserved.
This software is licensed under the BSD open-source license. See
http://www.opensource.org/licenses/bsd-license.php for more detail.
*************************************************************
Redistribution and use in source and binary forms, with or
without modification, are permitted provided that the following
conditions are met:
Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
Neither the name of the University of Californa, Davis nor the names of
the contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
OF SUCH DAMAGE.
*/
#include "FrameBufferObject.h"
#include <iostream>
using namespace std;
#define LOG_FBO_CALLS 0
FrameBufferObject::FrameBufferObject()
: m_fboId(_GenerateFboId()),
m_savedFboId(0)
{
// Bind this FBO so that it actually gets created now
_GuardedBind();
_GuardedUnbind();
}
FrameBufferObject::~FrameBufferObject()
{
#if LOG_FBO_CALLS
printf("deleting FBO %d\n",m_fboId);
#endif
glDeleteFramebuffersEXT(1, &m_fboId);
}
void FrameBufferObject::Bind()
{
#if LOG_FBO_CALLS
printf("binding framebuffer %d\n",m_fboId);
#endif
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_fboId);
}
void FrameBufferObject::Disable()
{
#if LOG_FBO_CALLS
printf("binding window framebuffer \n");
#endif
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
}
void
FrameBufferObject::AttachTexture( GLenum texTarget, GLuint texId,
GLenum attachment, int mipLevel, int zSlice )
{
_GuardedBind();
/*
#ifndef NDEBUG
if( GetAttachedId(attachment) != texId ) {
#endif
*/
_FramebufferTextureND( attachment, texTarget,
texId, mipLevel, zSlice );
/*
#ifndef NDEBUG
}
else {
cerr << "FrameBufferObject::AttachTexture PERFORMANCE WARNING:\n"
<< "\tRedundant bind of texture (id = " << texId << ").\n"
<< "\tHINT : Compile with -DNDEBUG to remove this warning.\n";
}
#endif
*/
_GuardedUnbind();
}
void
FrameBufferObject::AttachTextures( int numTextures, GLenum texTarget[], GLuint texId[],
GLenum attachment[], int mipLevel[], int zSlice[] )
{
for(int i = 0; i < numTextures; ++i) {
AttachTexture( texTarget[i], texId[i],
attachment ? attachment[i] : (GL_COLOR_ATTACHMENT0_EXT + i),
mipLevel ? mipLevel[i] : 0,
zSlice ? zSlice[i] : 0 );
}
}
void
FrameBufferObject::AttachRenderBuffer( GLuint buffId, GLenum attachment )
{
_GuardedBind();
#ifndef NDEBUG
if( GetAttachedId(attachment) != buffId ) {
#endif
#if LOG_FBO_CALLS
printf("fbo %d: attaching renderbuffer to attachment point %d\n",m_fboId,attachment);
#endif
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, attachment,
GL_RENDERBUFFER_EXT, buffId);
#ifndef NDEBUG
}
else {
cerr << "FrameBufferObject::AttachRenderBuffer PERFORMANCE WARNING:\n"
<< "\tRedundant bind of Renderbuffer (id = " << buffId << ")\n"
<< "\tHINT : Compile with -DNDEBUG to remove this warning.\n";
}
#endif
_GuardedUnbind();
}
void
FrameBufferObject::AttachRenderBuffers( int numBuffers, GLuint buffId[], GLenum attachment[] )
{
for(int i = 0; i < numBuffers; ++i) {
AttachRenderBuffer( buffId[i],
attachment ? attachment[i] : (GL_COLOR_ATTACHMENT0_EXT + i) );
}
}
void
FrameBufferObject::Unattach( GLenum attachment )
{
_GuardedBind();
GLenum type = GetAttachedType(attachment);
#if LOG_FBO_CALLS
printf("fbo %d: detatching from attachment point %d\n",m_fboId,attachment);
#endif
switch(type) {
case GL_NONE:
break;
case GL_RENDERBUFFER_EXT:
AttachRenderBuffer( 0, attachment );
break;
case GL_TEXTURE:
AttachTexture( GL_TEXTURE_2D, 0, attachment );
break;
default:
cerr << "FrameBufferObject::unbind_attachment ERROR: Unknown attached resource type\n";
}
_GuardedUnbind();
}
void
FrameBufferObject::UnattachAll()
{
int numAttachments = GetMaxColorAttachments();
for(int i = 0; i < numAttachments; ++i) {
Unattach( GL_COLOR_ATTACHMENT0_EXT + i );
}
}
GLint FrameBufferObject::GetMaxColorAttachments()
{
GLint maxAttach = 0;
glGetIntegerv( GL_MAX_COLOR_ATTACHMENTS_EXT, &maxAttach );
return maxAttach;
}
GLuint FrameBufferObject::_GenerateFboId()
{
GLuint id = 0;
glGenFramebuffersEXT(1, &id);
#if LOG_FBO_CALLS
printf("created FBO %d\n",id);
#endif
return id;
}
void FrameBufferObject::_GuardedBind()
{
// Only binds if m_fboId is different than the currently bound FBO
glGetIntegerv( GL_FRAMEBUFFER_BINDING_EXT, &m_savedFboId );
if (m_fboId != (GLuint)m_savedFboId) {
#if LOG_FBO_CALLS
printf("binding framebuffer %d\n",m_fboId);
#endif
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_fboId);
}
}
void FrameBufferObject::_GuardedUnbind()
{
// Returns FBO binding to the previously enabled FBO
if (m_fboId != (GLuint)m_savedFboId) {
#if LOG_FBO_CALLS
printf("binding framebuffer %d\n",m_savedFboId);
#endif
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, (GLuint)m_savedFboId);
}
}
void
FrameBufferObject::_FramebufferTextureND( GLenum attachment, GLenum texTarget,
GLuint texId, int mipLevel,
int zSlice )
{
#if LOG_FBO_CALLS
printf("fbo %d: attaching texture %d to attachment point %d\n",m_fboId,texId,attachment);
#endif
if (texTarget == GL_TEXTURE_1D) {
glFramebufferTexture1DEXT( GL_FRAMEBUFFER_EXT, attachment,
GL_TEXTURE_1D, texId, mipLevel );
}
else if (texTarget == GL_TEXTURE_3D) {
glFramebufferTexture3DEXT( GL_FRAMEBUFFER_EXT, attachment,
GL_TEXTURE_3D, texId, mipLevel, zSlice );
}
else {
// Default is GL_TEXTURE_2D, GL_TEXTURE_RECTANGLE_ARB, or cube faces
glFramebufferTexture2DEXT( GL_FRAMEBUFFER_EXT, attachment,
texTarget, texId, mipLevel );
}
}
#ifndef NDEBUG
bool FrameBufferObject::IsValid( ostream& ostr )
{
_GuardedBind();
#if LOG_FBO_CALLS
printf("fbo %d: checking for FBO errors\n",m_fboId);
#endif
bool isOK = false;
GLenum status;
status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
switch(status) {
case GL_FRAMEBUFFER_COMPLETE_EXT: // Everything's OK
isOK = true;
break;
case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT:
ostr << "glift::CheckFramebufferStatus() ERROR:\n\t"
<< "GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT\n";
isOK = false;
break;
case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT:
ostr << "glift::CheckFramebufferStatus() ERROR:\n\t"
<< "GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT\n";
isOK = false;
break;
case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT:
ostr << "glift::CheckFramebufferStatus() ERROR:\n\t"
<< "GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT\n";
isOK = false;
break;
case GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT:
ostr << "glift::CheckFramebufferStatus() ERROR:\n\t"
<< "GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT\n";
isOK = false;
break;
case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT:
ostr << "glift::CheckFramebufferStatus() ERROR:\n\t"
<< "GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT\n";
isOK = false;
break;
case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT:
ostr << "glift::CheckFramebufferStatus() ERROR:\n\t"
<< "GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT\n";
isOK = false;
break;
case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
ostr << "glift::CheckFramebufferStatus() ERROR:\n\t"
<< "GL_FRAMEBUFFER_UNSUPPORTED_EXT\n";
isOK = false;
break;
default:
ostr << "glift::CheckFramebufferStatus() ERROR:\n\t"
<< "Unknown ERROR\n";
isOK = false;
}
_GuardedUnbind();
return isOK;
}
#endif // NDEBUG
/// Accessors
GLenum FrameBufferObject::GetAttachedType( GLenum attachment )
{
#if LOG_FBO_CALLS
printf("querying type of attachment at %d\n",attachment);
#endif
// Returns GL_RENDERBUFFER_EXT or GL_TEXTURE
_GuardedBind();
GLint type = 0;
glGetFramebufferAttachmentParameterivEXT(GL_FRAMEBUFFER_EXT, attachment,
GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT,
&type);
_GuardedUnbind();
return GLenum(type);
}
GLuint FrameBufferObject::GetAttachedId( GLenum attachment )
{
#if LOG_FBO_CALLS
printf("getting id of attachment at %d\n",attachment);
#endif
_GuardedBind();
GLint id = 0;
glGetFramebufferAttachmentParameterivEXT(GL_FRAMEBUFFER_EXT, attachment,
GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT,
&id);
_GuardedUnbind();
return GLuint(id);
}
GLint FrameBufferObject::GetAttachedMipLevel( GLenum attachment )
{
#if LOG_FBO_CALLS
printf("getting mip level of attachment at %d\n",attachment);
#endif
_GuardedBind();
GLint level = 0;
glGetFramebufferAttachmentParameterivEXT(GL_FRAMEBUFFER_EXT, attachment,
GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT,
&level);
_GuardedUnbind();
return level;
}
GLint FrameBufferObject::GetAttachedCubeFace( GLenum attachment )
{
#if LOG_FBO_CALLS
printf("getting cube face id of attachment at %d\n",attachment);
#endif
_GuardedBind();
GLint level = 0;
glGetFramebufferAttachmentParameterivEXT(GL_FRAMEBUFFER_EXT, attachment,
GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT,
&level);
_GuardedUnbind();
return level;
}
GLint FrameBufferObject::GetAttachedZSlice( GLenum attachment )
{
#if LOG_FBO_CALLS
printf("querying z slice of attachment at %d\n",attachment);
#endif
_GuardedBind();
GLint slice = 0;
glGetFramebufferAttachmentParameterivEXT(GL_FRAMEBUFFER_EXT, attachment,
GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT,
&slice);
_GuardedUnbind();
return slice;
}