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38e6ef5aee
Backed out changeset fc04c5d43550 (bug 709490) Backed out changeset cd8f9410d335 (bug 709490) Backed out changeset 6e687c9143c1 (bug 709490) Backed out changeset 9b20f2c833c4 (bug 709490) Backed out changeset f9d130aea88e (bug 709490) Backed out changeset fc513b410949 (bug 709490) Backed out changeset acf6220b431a (bug 709490) Backed out changeset 9bceaf913791 (bug 709490) Backed out changeset 37fba20111e2 (bug 709490) Backed out changeset 2285ce1596b8 (bug 709490) Backed out changeset fb4e09920569 (bug 709490)
80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* vim: set ts=8 sts=4 et sw=4 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GLREADTEXIMAGEHELPER_H_
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#define GLREADTEXIMAGEHELPER_H_
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#include "GLContextTypes.h"
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#include "mozilla/Attributes.h"
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#include "nsSize.h"
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#include "nsAutoPtr.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/gfx/Types.h"
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namespace mozilla {
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namespace gfx {
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class DataSourceSurface;
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} // namespace gfx
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namespace gl {
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// Returns true if the `dest{Format,Type}` are the same as the
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// `read{Format,Type}`.
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bool GetActualReadFormats(GLContext* gl,
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GLenum destFormat, GLenum destType,
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GLenum* out_readFormat, GLenum* out_readType);
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void ReadPixelsIntoDataSurface(GLContext* aGL,
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gfx::DataSourceSurface* aSurface);
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already_AddRefed<gfx::DataSourceSurface>
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ReadBackSurface(GLContext* gl, GLuint aTexture, bool aYInvert, gfx::SurfaceFormat aFormat);
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class GLReadTexImageHelper final
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{
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// The GLContext is the sole owner of the GLBlitHelper.
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GLContext* mGL;
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GLuint mPrograms[4];
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GLuint TextureImageProgramFor(GLenum aTextureTarget, int aShader);
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bool DidGLErrorOccur(const char* str);
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public:
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explicit GLReadTexImageHelper(GLContext* gl);
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~GLReadTexImageHelper();
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/**
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* Read the image data contained in aTexture, and return it as an ImageSurface.
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* If GL_RGBA is given as the format, a gfxImageFormat::ARGB32 surface is returned.
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* Not implemented yet:
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* If GL_RGB is given as the format, a gfxImageFormat::RGB24 surface is returned.
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* If GL_LUMINANCE is given as the format, a gfxImageFormat::A8 surface is returned.
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*
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* THIS IS EXPENSIVE. It is ridiculously expensive. Only do this
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* if you absolutely positively must, and never in any performance
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* critical path.
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*
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* NOTE: aShaderProgram is really mozilla::layers::ShaderProgramType. It is
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* passed as int to eliminate including LayerManagerOGLProgram.h here.
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*/
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already_AddRefed<gfx::DataSourceSurface> ReadTexImage(GLuint aTextureId,
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GLenum aTextureTarget,
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const gfx::IntSize& aSize,
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/* ShaderProgramType */ int aShaderProgram,
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bool aYInvert = false);
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};
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} // namespace gl
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} // namespace mozilla
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#endif
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