зеркало из https://github.com/mozilla/gecko-dev.git
74 строки
2.3 KiB
C++
74 строки
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"
|
|
|
|
namespace mozilla {
|
|
|
|
namespace gfx {
|
|
class DataSourceSurface;
|
|
}
|
|
|
|
namespace gl {
|
|
|
|
void ReadPixelsIntoDataSurface(GLContext* aGL,
|
|
gfx::DataSourceSurface* 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:
|
|
|
|
explicit 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.
|
|
*/
|
|
TemporaryRef<gfx::DataSourceSurface> ReadTexImage(GLuint aTextureId,
|
|
GLenum aTextureTarget,
|
|
const gfx::IntSize& aSize,
|
|
/* ShaderProgramType */ int aShaderProgram,
|
|
bool aYInvert = false);
|
|
|
|
|
|
};
|
|
|
|
}
|
|
}
|
|
|
|
#endif
|