1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/gl/GLBlitTextureImageHelper.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,69 @@
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 GLBLITTEXTUREIMAGEHELPER_H_
1.11 +#define GLBLITTEXTUREIMAGEHELPER_H_
1.12 +
1.13 +#include "mozilla/Attributes.h"
1.14 +#include "GLContextTypes.h"
1.15 +#include "GLConsts.h"
1.16 +
1.17 +struct nsIntRect;
1.18 +
1.19 +namespace mozilla {
1.20 +namespace gl {
1.21 +
1.22 +class GLContext;
1.23 +class TextureImage;
1.24 +
1.25 +class GLBlitTextureImageHelper MOZ_FINAL
1.26 +{
1.27 + // The GLContext is the sole owner of the GLBlitTextureImageHelper.
1.28 + GLContext* mGL;
1.29 +
1.30 + // lazy-initialized things
1.31 + GLuint mBlitProgram, mBlitFramebuffer;
1.32 + void UseBlitProgram();
1.33 + void SetBlitFramebufferForDestTexture(GLuint aTexture);
1.34 +
1.35 +public:
1.36 +
1.37 + GLBlitTextureImageHelper(GLContext *gl);
1.38 + ~GLBlitTextureImageHelper();
1.39 +
1.40 + /**
1.41 + * Copy a rectangle from one TextureImage into another. The
1.42 + * source and destination are given in integer coordinates, and
1.43 + * will be converted to texture coordinates.
1.44 + *
1.45 + * For the source texture, the wrap modes DO apply -- it's valid
1.46 + * to use REPEAT or PAD and expect appropriate behaviour if the source
1.47 + * rectangle extends beyond its bounds.
1.48 + *
1.49 + * For the destination texture, the wrap modes DO NOT apply -- the
1.50 + * destination will be clipped by the bounds of the texture.
1.51 + *
1.52 + * Note: calling this function will cause the following OpenGL state
1.53 + * to be changed:
1.54 + *
1.55 + * - current program
1.56 + * - framebuffer binding
1.57 + * - viewport
1.58 + * - blend state (will be enabled at end)
1.59 + * - scissor state (will be enabled at end)
1.60 + * - vertex attrib 0 and 1 (pointer and enable state [enable state will be disabled at exit])
1.61 + * - array buffer binding (will be 0)
1.62 + * - active texture (will be 0)
1.63 + * - texture 0 binding
1.64 + */
1.65 + void BlitTextureImage(TextureImage *aSrc, const nsIntRect& aSrcRect,
1.66 + TextureImage *aDst, const nsIntRect& aDstRect);
1.67 +};
1.68 +
1.69 +}
1.70 +}
1.71 +
1.72 +#endif // GLBLITTEXTUREIMAGEHELPER_H_
