1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/gl/GLReadTexImageHelper.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,75 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* vim: set ts=8 sts=4 et sw=4 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef GLREADTEXIMAGEHELPER_H_
1.11 +#define GLREADTEXIMAGEHELPER_H_
1.12 +
1.13 +#include "GLContextTypes.h"
1.14 +#include "mozilla/Attributes.h"
1.15 +#include "nsSize.h"
1.16 +#include "nsAutoPtr.h"
1.17 +#include "mozilla/RefPtr.h"
1.18 +#include "mozilla/gfx/Types.h"
1.19 +
1.20 +class gfxImageSurface;
1.21 +
1.22 +namespace mozilla {
1.23 +
1.24 +namespace gfx {
1.25 +class DataSourceSurface;
1.26 +}
1.27 +
1.28 +namespace gl {
1.29 +
1.30 +void ReadPixelsIntoImageSurface(GLContext* aGL, gfxImageSurface* aSurface);
1.31 +void ReadScreenIntoImageSurface(GLContext* aGL, gfxImageSurface* aSurface);
1.32 +
1.33 +TemporaryRef<gfx::DataSourceSurface>
1.34 +ReadBackSurface(GLContext* gl, GLuint aTexture, bool aYInvert, gfx::SurfaceFormat aFormat);
1.35 +
1.36 +class GLReadTexImageHelper MOZ_FINAL
1.37 +{
1.38 + // The GLContext is the sole owner of the GLBlitHelper.
1.39 + GLContext* mGL;
1.40 +
1.41 + GLuint mPrograms[4];
1.42 +
1.43 + GLuint TextureImageProgramFor(GLenum aTextureTarget, int aShader);
1.44 +
1.45 + bool DidGLErrorOccur(const char* str);
1.46 +
1.47 +public:
1.48 +
1.49 + GLReadTexImageHelper(GLContext* gl);
1.50 + ~GLReadTexImageHelper();
1.51 +
1.52 + /**
1.53 + * Read the image data contained in aTexture, and return it as an ImageSurface.
1.54 + * If GL_RGBA is given as the format, a gfxImageFormat::ARGB32 surface is returned.
1.55 + * Not implemented yet:
1.56 + * If GL_RGB is given as the format, a gfxImageFormat::RGB24 surface is returned.
1.57 + * If GL_LUMINANCE is given as the format, a gfxImageFormat::A8 surface is returned.
1.58 + *
1.59 + * THIS IS EXPENSIVE. It is ridiculously expensive. Only do this
1.60 + * if you absolutely positively must, and never in any performance
1.61 + * critical path.
1.62 + *
1.63 + * NOTE: aShaderProgram is really mozilla::layers::ShaderProgramType. It is
1.64 + * passed as int to eliminate including LayerManagerOGLProgram.h here.
1.65 + */
1.66 + TemporaryRef<gfx::DataSourceSurface> ReadTexImage(GLuint aTextureId,
1.67 + GLenum aTextureTarget,
1.68 + const gfx::IntSize& aSize,
1.69 + /* ShaderProgramType */ int aShaderProgram,
1.70 + bool aYInvert = false);
1.71 +
1.72 +
1.73 +};
1.74 +
1.75 +}
1.76 +}
1.77 +
1.78 +#endif
