src/OpenGL/libGLES_CM/Framebuffer.cpp - SwiftShader - Git at Google

 // Copyright 2016 The SwiftShader Authors. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //    http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 // Framebuffer.cpp: Implements the Framebuffer class. Implements GL framebuffer
 // objects and related functionality. [OpenGL ES 2.0.24] section 4.4 page 105.

 #include "Framebuffer.h"

 #include "main.h"
 #include "Renderbuffer.h"
 #include "Texture.h"
 #include "utilities.h"

 namespace es1
 {

 Framebuffer::Framebuffer()
 {
 	mColorbufferType = GL_NONE_OES;
 	mDepthbufferType = GL_NONE_OES;
 	mStencilbufferType = GL_NONE_OES;
 }

 Framebuffer::~Framebuffer()
 {
 	mColorbufferPointer = nullptr;
 	mDepthbufferPointer = nullptr;
 	mStencilbufferPointer = nullptr;
 }

 Renderbuffer *Framebuffer::lookupRenderbuffer(GLenum type, GLuint handle, GLint level) const
 {
 	Context *context = getContext();
 	Renderbuffer *buffer = nullptr;

 	if(type == GL_NONE_OES)
 	{
 		buffer = nullptr;
 	}
 	else if(type == GL_RENDERBUFFER_OES)
 	{
 		buffer = context->getRenderbuffer(handle);
 	}
 	else if(IsTextureTarget(type))
 	{
 		buffer = context->getTexture(handle)->getRenderbuffer(type, level);
 	}
 	else UNREACHABLE(type);

 	return buffer;
 }

 void Framebuffer::setColorbuffer(GLenum type, GLuint colorbuffer, GLint level)
 {
 	mColorbufferType = (colorbuffer != 0) ? type : GL_NONE_OES;
 	mColorbufferPointer = lookupRenderbuffer(type, colorbuffer, level);
 }

 void Framebuffer::setDepthbuffer(GLenum type, GLuint depthbuffer, GLint level)
 {
 	mDepthbufferType = (depthbuffer != 0) ? type : GL_NONE_OES;
 	mDepthbufferPointer = lookupRenderbuffer(type, depthbuffer, level);
 }

 void Framebuffer::setStencilbuffer(GLenum type, GLuint stencilbuffer, GLint level)
 {
 	mStencilbufferType = (stencilbuffer != 0) ? type : GL_NONE_OES;
 	mStencilbufferPointer = lookupRenderbuffer(type, stencilbuffer, level);
 }

 void Framebuffer::detachTexture(GLuint texture)
 {
 	if(mColorbufferPointer.name() == texture && IsTextureTarget(mColorbufferType))
 	{
 		mColorbufferType = GL_NONE_OES;
 		mColorbufferPointer = nullptr;
 	}

 	if(mDepthbufferPointer.name() == texture && IsTextureTarget(mDepthbufferType))
 	{
 		mDepthbufferType = GL_NONE_OES;
 		mDepthbufferPointer = nullptr;
 	}

 	if(mStencilbufferPointer.name() == texture && IsTextureTarget(mStencilbufferType))
 	{
 		mStencilbufferType = GL_NONE_OES;
 		mStencilbufferPointer = nullptr;
 	}
 }

 void Framebuffer::detachRenderbuffer(GLuint renderbuffer)
 {
 	if(mColorbufferPointer.name() == renderbuffer && mColorbufferType == GL_RENDERBUFFER_OES)
 	{
 		mColorbufferType = GL_NONE_OES;
 		mColorbufferPointer = nullptr;
 	}

 	if(mDepthbufferPointer.name() == renderbuffer && mDepthbufferType == GL_RENDERBUFFER_OES)
 	{
 		mDepthbufferType = GL_NONE_OES;
 		mDepthbufferPointer = nullptr;
 	}

 	if(mStencilbufferPointer.name() == renderbuffer && mStencilbufferType == GL_RENDERBUFFER_OES)
 	{
 		mStencilbufferType = GL_NONE_OES;
 		mStencilbufferPointer = nullptr;
 	}
 }

 // Increments refcount on surface.
 // caller must Release() the returned surface
 egl::Image *Framebuffer::getRenderTarget()
 {
 	Renderbuffer *colorbuffer = mColorbufferPointer;

 	if(colorbuffer)
 	{
 		return colorbuffer->getRenderTarget();
 	}

 	return nullptr;
 }

 // Increments refcount on surface.
 // caller must Release() the returned surface
 egl::Image *Framebuffer::getDepthBuffer()
 {
 	Renderbuffer *depthbuffer = mDepthbufferPointer;

 	if(depthbuffer)
 	{
 		return depthbuffer->getRenderTarget();
 	}

 	return nullptr;
 }

 // Increments refcount on surface.
 // caller must Release() the returned surface
 egl::Image *Framebuffer::getStencilBuffer()
 {
 	Renderbuffer *stencilbuffer = mStencilbufferPointer;

 	if(stencilbuffer)
 	{
 		return stencilbuffer->getRenderTarget();
 	}

 	return nullptr;
 }

 Renderbuffer *Framebuffer::getColorbuffer()
 {
 	return mColorbufferPointer;
 }

 Renderbuffer *Framebuffer::getDepthbuffer()
 {
 	return mDepthbufferPointer;
 }

 Renderbuffer *Framebuffer::getStencilbuffer()
 {
 	return mStencilbufferPointer;
 }

 GLenum Framebuffer::getColorbufferType()
 {
 	return mColorbufferType;
 }

 GLenum Framebuffer::getDepthbufferType()
 {
 	return mDepthbufferType;
 }

 GLenum Framebuffer::getStencilbufferType()
 {
 	return mStencilbufferType;
 }

 GLuint Framebuffer::getColorbufferName()
 {
 	return mColorbufferPointer.name();
 }

 GLuint Framebuffer::getDepthbufferName()
 {
 	return mDepthbufferPointer.name();
 }

 GLuint Framebuffer::getStencilbufferName()
 {
 	return mStencilbufferPointer.name();
 }

 bool Framebuffer::hasStencil()
 {
 	if(mStencilbufferType != GL_NONE_OES)
 	{
 		Renderbuffer *stencilbufferObject = getStencilbuffer();

 		if(stencilbufferObject)
 		{
 			return stencilbufferObject->getStencilSize() > 0;
 		}
 	}

 	return false;
 }

 GLenum Framebuffer::completeness()
 {
 	int width;
 	int height;
 	int samples;

 	return completeness(width, height, samples);
 }

 GLenum Framebuffer::completeness(int &width, int &height, int &samples)
 {
 	width = -1;
 	height = -1;
 	samples = -1;

 	if(mColorbufferType != GL_NONE_OES)
 	{
 		Renderbuffer *colorbuffer = getColorbuffer();

 		if(!colorbuffer)
 		{
 			return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
 		}

 		if(colorbuffer->getWidth() == 0 || colorbuffer->getHeight() == 0)
 		{
 			return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
 		}

 		if(mColorbufferType == GL_RENDERBUFFER_OES)
 		{
 			if(!IsColorRenderable(colorbuffer->getFormat()))
 			{
 				return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
 			}
 		}
 		else if(IsTextureTarget(mColorbufferType))
 		{
 			GLenum format = colorbuffer->getFormat();

 			if(!IsColorRenderable(format))
 			{
 				return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
 			}

 			if(IsDepthTexture(format) || IsStencilTexture(format))
 			{
 				return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
 			}
 		}
 		else
 		{
 			UNREACHABLE(mColorbufferType);
 			return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
 		}

 		width = colorbuffer->getWidth();
 		height = colorbuffer->getHeight();
 		samples = colorbuffer->getSamples();
 	}

 	Renderbuffer *depthbuffer = nullptr;
 	Renderbuffer *stencilbuffer = nullptr;

 	if(mDepthbufferType != GL_NONE_OES)
 	{
 		depthbuffer = getDepthbuffer();

 		if(!depthbuffer)
 		{
 			return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
 		}

 		if(depthbuffer->getWidth() == 0 || depthbuffer->getHeight() == 0)
 		{
 			return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
 		}

 		if(mDepthbufferType == GL_RENDERBUFFER_OES)
 		{
 			if(!es1::IsDepthRenderable(depthbuffer->getFormat()))
 			{
 				return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
 			}
 		}
 		else if(IsTextureTarget(mDepthbufferType))
 		{
 			if(!es1::IsDepthTexture(depthbuffer->getFormat()))
 			{
 				return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
 			}
 		}
 		else
 		{
 			UNREACHABLE(mDepthbufferType);
 			return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
 		}

 		if(width == -1 || height == -1)
 		{
 			width = depthbuffer->getWidth();
 			height = depthbuffer->getHeight();
 			samples = depthbuffer->getSamples();
 		}
 		else if(width != depthbuffer->getWidth() || height != depthbuffer->getHeight())
 		{
 			return GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_OES;
 		}
 		else if(samples != depthbuffer->getSamples())
 		{
 			UNREACHABLE(0);
 		}
 	}

 	if(mStencilbufferType != GL_NONE_OES)
 	{
 		stencilbuffer = getStencilbuffer();

 		if(!stencilbuffer)
 		{
 			return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
 		}

 		if(stencilbuffer->getWidth() == 0 || stencilbuffer->getHeight() == 0)
 		{
 			return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
 		}

 		if(mStencilbufferType == GL_RENDERBUFFER_OES)
 		{
 			if(!es1::IsStencilRenderable(stencilbuffer->getFormat()))
 			{
 				return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
 			}
 		}
 		else if(IsTextureTarget(mStencilbufferType))
 		{
 			GLenum internalformat = stencilbuffer->getFormat();

 			if(!es1::IsStencilTexture(internalformat))
 			{
 				return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
 			}
 		}
 		else
 		{
 			UNREACHABLE(mStencilbufferType);
 			return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
 		}

 		if(width == -1 || height == -1)
 		{
 			width = stencilbuffer->getWidth();
 			height = stencilbuffer->getHeight();
 			samples = stencilbuffer->getSamples();
 		}
 		else if(width != stencilbuffer->getWidth() || height != stencilbuffer->getHeight())
 		{
 			return GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_OES;
 		}
 		else if(samples != stencilbuffer->getSamples())
 		{
 			UNREACHABLE(0);
 			return GL_FRAMEBUFFER_UNSUPPORTED_OES;   // GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE_OES;
 		}
 	}

 	// We need to have at least one attachment to be complete
 	if(width == -1 || height == -1)
 	{
 		return GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_OES;
 	}

 	return GL_FRAMEBUFFER_COMPLETE_OES;
 }

 GLenum Framebuffer::getImplementationColorReadFormat()
 {
 	Renderbuffer *colorbuffer = mColorbufferPointer;

 	if(colorbuffer)
 	{
 		switch(colorbuffer->getFormat())
 		{
 		case GL_BGRA8_EXT:   return GL_BGRA_EXT;
 		case GL_RGBA4_OES:   return GL_RGBA;
 		case GL_RGB5_A1_OES: return GL_RGBA;
 		case GL_RGBA8_OES:   return GL_RGBA;
 		case GL_RGB565_OES:  return GL_RGBA;
 		case GL_RGB8_OES:    return GL_RGB;
 		default:
 			UNREACHABLE(colorbuffer->getFormat());
 		}
 	}

 	return GL_RGBA;
 }

 GLenum Framebuffer::getImplementationColorReadType()
 {
 	Renderbuffer *colorbuffer = mColorbufferPointer;

 	if(colorbuffer)
 	{
 		switch(colorbuffer->getFormat())
 		{
 		case GL_BGRA8_EXT:   return GL_UNSIGNED_BYTE;
 		case GL_RGBA4_OES:   return GL_UNSIGNED_SHORT_4_4_4_4;
 		case GL_RGB5_A1_OES: return GL_UNSIGNED_SHORT_5_5_5_1;
 		case GL_RGBA8_OES:   return GL_UNSIGNED_BYTE;
 		case GL_RGB565_OES:  return GL_UNSIGNED_SHORT_5_6_5;
 		case GL_RGB8_OES:    return GL_UNSIGNED_BYTE;
 		default:
 			UNREACHABLE(colorbuffer->getFormat());
 		}
 	}

 	return GL_UNSIGNED_BYTE;
 }

 DefaultFramebuffer::DefaultFramebuffer(Colorbuffer *colorbuffer, DepthStencilbuffer *depthStencil)
 {
 	mColorbufferPointer = new Renderbuffer(0, colorbuffer);

 	Renderbuffer *depthStencilRenderbuffer = new Renderbuffer(0, depthStencil);
 	mDepthbufferPointer = depthStencilRenderbuffer;
 	mStencilbufferPointer = depthStencilRenderbuffer;

 	mColorbufferType = GL_RENDERBUFFER_OES;
 	mDepthbufferType = (depthStencilRenderbuffer->getDepthSize() != 0) ? GL_RENDERBUFFER_OES : GL_NONE_OES;
 	mStencilbufferType = (depthStencilRenderbuffer->getStencilSize() != 0) ? GL_RENDERBUFFER_OES : GL_NONE_OES;
 }

 }
	// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	// Framebuffer.cpp: Implements the Framebuffer class. Implements GL framebuffer
	// objects and related functionality. [OpenGL ES 2.0.24] section 4.4 page 105.

	#include "Framebuffer.h"

	#include "main.h"
	#include "Renderbuffer.h"
	#include "Texture.h"
	#include "utilities.h"

	namespace es1
	{

	Framebuffer::Framebuffer()
	{
	mColorbufferType = GL_NONE_OES;
	mDepthbufferType = GL_NONE_OES;
	mStencilbufferType = GL_NONE_OES;
	}

	Framebuffer::~Framebuffer()
	{
	mColorbufferPointer = nullptr;
	mDepthbufferPointer = nullptr;
	mStencilbufferPointer = nullptr;
	}

	Renderbuffer *Framebuffer::lookupRenderbuffer(GLenum type, GLuint handle, GLint level) const
	{
	Context *context = getContext();
	Renderbuffer *buffer = nullptr;

	if(type == GL_NONE_OES)
	{
	buffer = nullptr;
	}
	else if(type == GL_RENDERBUFFER_OES)
	{
	buffer = context->getRenderbuffer(handle);
	}
	else if(IsTextureTarget(type))
	{
	buffer = context->getTexture(handle)->getRenderbuffer(type, level);
	}
	else UNREACHABLE(type);

	return buffer;
	}

	void Framebuffer::setColorbuffer(GLenum type, GLuint colorbuffer, GLint level)
	{
	mColorbufferType = (colorbuffer != 0) ? type : GL_NONE_OES;
	mColorbufferPointer = lookupRenderbuffer(type, colorbuffer, level);
	}

	void Framebuffer::setDepthbuffer(GLenum type, GLuint depthbuffer, GLint level)
	{
	mDepthbufferType = (depthbuffer != 0) ? type : GL_NONE_OES;
	mDepthbufferPointer = lookupRenderbuffer(type, depthbuffer, level);
	}

	void Framebuffer::setStencilbuffer(GLenum type, GLuint stencilbuffer, GLint level)
	{
	mStencilbufferType = (stencilbuffer != 0) ? type : GL_NONE_OES;
	mStencilbufferPointer = lookupRenderbuffer(type, stencilbuffer, level);
	}

	void Framebuffer::detachTexture(GLuint texture)
	{
	if(mColorbufferPointer.name() == texture && IsTextureTarget(mColorbufferType))
	{
	mColorbufferType = GL_NONE_OES;
	mColorbufferPointer = nullptr;
	}

	if(mDepthbufferPointer.name() == texture && IsTextureTarget(mDepthbufferType))
	{
	mDepthbufferType = GL_NONE_OES;
	mDepthbufferPointer = nullptr;
	}

	if(mStencilbufferPointer.name() == texture && IsTextureTarget(mStencilbufferType))
	{
	mStencilbufferType = GL_NONE_OES;
	mStencilbufferPointer = nullptr;
	}
	}

	void Framebuffer::detachRenderbuffer(GLuint renderbuffer)
	{
	if(mColorbufferPointer.name() == renderbuffer && mColorbufferType == GL_RENDERBUFFER_OES)
	{
	mColorbufferType = GL_NONE_OES;
	mColorbufferPointer = nullptr;
	}

	if(mDepthbufferPointer.name() == renderbuffer && mDepthbufferType == GL_RENDERBUFFER_OES)
	{
	mDepthbufferType = GL_NONE_OES;
	mDepthbufferPointer = nullptr;
	}

	if(mStencilbufferPointer.name() == renderbuffer && mStencilbufferType == GL_RENDERBUFFER_OES)
	{
	mStencilbufferType = GL_NONE_OES;
	mStencilbufferPointer = nullptr;
	}
	}

	// Increments refcount on surface.
	// caller must Release() the returned surface
	egl::Image *Framebuffer::getRenderTarget()
	{
	Renderbuffer *colorbuffer = mColorbufferPointer;

	if(colorbuffer)
	{
	return colorbuffer->getRenderTarget();
	}

	return nullptr;
	}

	// Increments refcount on surface.
	// caller must Release() the returned surface
	egl::Image *Framebuffer::getDepthBuffer()
	{
	Renderbuffer *depthbuffer = mDepthbufferPointer;

	if(depthbuffer)
	{
	return depthbuffer->getRenderTarget();
	}

	return nullptr;
	}

	// Increments refcount on surface.
	// caller must Release() the returned surface
	egl::Image *Framebuffer::getStencilBuffer()
	{
	Renderbuffer *stencilbuffer = mStencilbufferPointer;

	if(stencilbuffer)
	{
	return stencilbuffer->getRenderTarget();
	}

	return nullptr;
	}

	Renderbuffer *Framebuffer::getColorbuffer()
	{
	return mColorbufferPointer;
	}

	Renderbuffer *Framebuffer::getDepthbuffer()
	{
	return mDepthbufferPointer;
	}

	Renderbuffer *Framebuffer::getStencilbuffer()
	{
	return mStencilbufferPointer;
	}

	GLenum Framebuffer::getColorbufferType()
	{
	return mColorbufferType;
	}

	GLenum Framebuffer::getDepthbufferType()
	{
	return mDepthbufferType;
	}

	GLenum Framebuffer::getStencilbufferType()
	{
	return mStencilbufferType;
	}

	GLuint Framebuffer::getColorbufferName()
	{
	return mColorbufferPointer.name();
	}

	GLuint Framebuffer::getDepthbufferName()
	{
	return mDepthbufferPointer.name();
	}

	GLuint Framebuffer::getStencilbufferName()
	{
	return mStencilbufferPointer.name();
	}

	bool Framebuffer::hasStencil()
	{
	if(mStencilbufferType != GL_NONE_OES)
	{
	Renderbuffer *stencilbufferObject = getStencilbuffer();

	if(stencilbufferObject)
	{
	return stencilbufferObject->getStencilSize() > 0;
	}
	}

	return false;
	}

	GLenum Framebuffer::completeness()
	{
	int width;
	int height;
	int samples;

	return completeness(width, height, samples);
	}

	GLenum Framebuffer::completeness(int &width, int &height, int &samples)
	{
	width = -1;
	height = -1;
	samples = -1;

	if(mColorbufferType != GL_NONE_OES)
	{
	Renderbuffer *colorbuffer = getColorbuffer();

	if(!colorbuffer)
	{
	return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
	}

	if(colorbuffer->getWidth() == 0 \|\| colorbuffer->getHeight() == 0)
	{
	return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
	}

	if(mColorbufferType == GL_RENDERBUFFER_OES)
	{
	if(!IsColorRenderable(colorbuffer->getFormat()))
	{
	return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
	}
	}
	else if(IsTextureTarget(mColorbufferType))
	{
	GLenum format = colorbuffer->getFormat();

	if(!IsColorRenderable(format))
	{
	return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
	}

	if(IsDepthTexture(format) \|\| IsStencilTexture(format))
	{
	return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
	}
	}
	else
	{
	UNREACHABLE(mColorbufferType);
	return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
	}

	width = colorbuffer->getWidth();
	height = colorbuffer->getHeight();
	samples = colorbuffer->getSamples();
	}

	Renderbuffer *depthbuffer = nullptr;
	Renderbuffer *stencilbuffer = nullptr;

	if(mDepthbufferType != GL_NONE_OES)
	{
	depthbuffer = getDepthbuffer();

	if(!depthbuffer)
	{
	return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
	}

	if(depthbuffer->getWidth() == 0 \|\| depthbuffer->getHeight() == 0)
	{
	return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
	}

	if(mDepthbufferType == GL_RENDERBUFFER_OES)
	{
	if(!es1::IsDepthRenderable(depthbuffer->getFormat()))
	{
	return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
	}
	}
	else if(IsTextureTarget(mDepthbufferType))
	{
	if(!es1::IsDepthTexture(depthbuffer->getFormat()))
	{
	return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
	}
	}
	else
	{
	UNREACHABLE(mDepthbufferType);
	return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
	}

	if(width == -1 \|\| height == -1)
	{
	width = depthbuffer->getWidth();
	height = depthbuffer->getHeight();
	samples = depthbuffer->getSamples();
	}
	else if(width != depthbuffer->getWidth() \|\| height != depthbuffer->getHeight())
	{
	return GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_OES;
	}
	else if(samples != depthbuffer->getSamples())
	{
	UNREACHABLE(0);
	}
	}

	if(mStencilbufferType != GL_NONE_OES)
	{
	stencilbuffer = getStencilbuffer();

	if(!stencilbuffer)
	{
	return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
	}

	if(stencilbuffer->getWidth() == 0 \|\| stencilbuffer->getHeight() == 0)
	{
	return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
	}

	if(mStencilbufferType == GL_RENDERBUFFER_OES)
	{
	if(!es1::IsStencilRenderable(stencilbuffer->getFormat()))
	{
	return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
	}
	}
	else if(IsTextureTarget(mStencilbufferType))
	{
	GLenum internalformat = stencilbuffer->getFormat();

	if(!es1::IsStencilTexture(internalformat))
	{
	return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
	}
	}
	else
	{
	UNREACHABLE(mStencilbufferType);
	return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES;
	}

	if(width == -1 \|\| height == -1)
	{
	width = stencilbuffer->getWidth();
	height = stencilbuffer->getHeight();
	samples = stencilbuffer->getSamples();
	}
	else if(width != stencilbuffer->getWidth() \|\| height != stencilbuffer->getHeight())
	{
	return GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_OES;
	}
	else if(samples != stencilbuffer->getSamples())
	{
	UNREACHABLE(0);
	return GL_FRAMEBUFFER_UNSUPPORTED_OES; // GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE_OES;
	}
	}

	// We need to have at least one attachment to be complete
	if(width == -1 \|\| height == -1)
	{
	return GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_OES;
	}

	return GL_FRAMEBUFFER_COMPLETE_OES;
	}

	GLenum Framebuffer::getImplementationColorReadFormat()
	{
	Renderbuffer *colorbuffer = mColorbufferPointer;

	if(colorbuffer)
	{
	switch(colorbuffer->getFormat())
	{
	case GL_BGRA8_EXT: return GL_BGRA_EXT;
	case GL_RGBA4_OES: return GL_RGBA;
	case GL_RGB5_A1_OES: return GL_RGBA;
	case GL_RGBA8_OES: return GL_RGBA;
	case GL_RGB565_OES: return GL_RGBA;
	case GL_RGB8_OES: return GL_RGB;
	default:
	UNREACHABLE(colorbuffer->getFormat());
	}
	}

	return GL_RGBA;
	}

	GLenum Framebuffer::getImplementationColorReadType()
	{
	Renderbuffer *colorbuffer = mColorbufferPointer;

	if(colorbuffer)
	{
	switch(colorbuffer->getFormat())
	{
	case GL_BGRA8_EXT: return GL_UNSIGNED_BYTE;
	case GL_RGBA4_OES: return GL_UNSIGNED_SHORT_4_4_4_4;
	case GL_RGB5_A1_OES: return GL_UNSIGNED_SHORT_5_5_5_1;
	case GL_RGBA8_OES: return GL_UNSIGNED_BYTE;
	case GL_RGB565_OES: return GL_UNSIGNED_SHORT_5_6_5;
	case GL_RGB8_OES: return GL_UNSIGNED_BYTE;
	default:
	UNREACHABLE(colorbuffer->getFormat());
	}
	}

	return GL_UNSIGNED_BYTE;
	}

	DefaultFramebuffer::DefaultFramebuffer(Colorbuffer colorbuffer, DepthStencilbuffer depthStencil)
	{
	mColorbufferPointer = new Renderbuffer(0, colorbuffer);

	Renderbuffer *depthStencilRenderbuffer = new Renderbuffer(0, depthStencil);
	mDepthbufferPointer = depthStencilRenderbuffer;
	mStencilbufferPointer = depthStencilRenderbuffer;

	mColorbufferType = GL_RENDERBUFFER_OES;
	mDepthbufferType = (depthStencilRenderbuffer->getDepthSize() != 0) ? GL_RENDERBUFFER_OES : GL_NONE_OES;
	mStencilbufferType = (depthStencilRenderbuffer->getStencilSize() != 0) ? GL_RENDERBUFFER_OES : GL_NONE_OES;
	}

	}