gecko-dev/gfx/gl/GLReadTexImageHelper.h
Benoit Jacob e5ed95579b Bug 959380 - 2/5 - Make gfxImageFormat a typed enum - r=jrmuizel
find . -type f | grep -v \./obj | grep -v \.hg | xargs sed -i 's/\(^\|[^A-Za-z0-9_]\)gfxImageFormat\(ARGB32\|RGB24\|A8\|A1\|RGB16_565\|Unknown\)\($\|[^A-Za-z0-9_]\)/\1gfxImageFormat::\2\3/g'
2014-01-23 13:26:40 -05:00

76 lines
2.3 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set ts=8 sts=4 et sw=4 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef GLREADTEXIMAGEHELPER_H_
#define GLREADTEXIMAGEHELPER_H_
#include "GLContextTypes.h"
#include "mozilla/Attributes.h"
#include "nsSize.h"
#include "nsAutoPtr.h"
#include "mozilla/RefPtr.h"
#include "mozilla/gfx/Types.h"
class gfxImageSurface;
namespace mozilla {
namespace gfx {
class DataSourceSurface;
}
namespace gl {
void ReadPixelsIntoImageSurface(GLContext* aGL, gfxImageSurface* aSurface);
void ReadScreenIntoImageSurface(GLContext* aGL, gfxImageSurface* aSurface);
TemporaryRef<gfx::DataSourceSurface>
ReadBackSurface(GLContext* gl, GLuint aTexture, bool aYInvert, gfx::SurfaceFormat aFormat);
class GLReadTexImageHelper MOZ_FINAL
{
// The GLContext is the sole owner of the GLBlitHelper.
GLContext* mGL;
GLuint mPrograms[4];
GLuint TextureImageProgramFor(GLenum aTextureTarget, int aShader);
bool DidGLErrorOccur(const char* str);
public:
GLReadTexImageHelper(GLContext* gl);
~GLReadTexImageHelper();
/**
* Read the image data contained in aTexture, and return it as an ImageSurface.
* If GL_RGBA is given as the format, a gfxImageFormat::ARGB32 surface is returned.
* Not implemented yet:
* If GL_RGB is given as the format, a gfxImageFormat::RGB24 surface is returned.
* If GL_LUMINANCE is given as the format, a gfxImageFormat::A8 surface is returned.
*
* THIS IS EXPENSIVE. It is ridiculously expensive. Only do this
* if you absolutely positively must, and never in any performance
* critical path.
*
* NOTE: aShaderProgram is really mozilla::layers::ShaderProgramType. It is
* passed as int to eliminate including LayerManagerOGLProgram.h here.
*/
already_AddRefed<gfxImageSurface> ReadTexImage(GLuint aTextureId,
GLenum aTextureTarget,
const gfxIntSize& aSize,
/* ShaderProgramType */ int aShaderProgram,
bool aYInvert = false);
};
}
}
#endif