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comparison: gfx/gl/GLBlitTextureImageHelper.h
gfx/gl/GLBlitTextureImageHelper.h
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| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ | |
| 2 /* vim: set ts=8 sts=4 et sw=4 tw=80: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #ifndef GLBLITTEXTUREIMAGEHELPER_H_ | |
| 8 #define GLBLITTEXTUREIMAGEHELPER_H_ | |
| 9 | |
| 10 #include "mozilla/Attributes.h" | |
| 11 #include "GLContextTypes.h" | |
| 12 #include "GLConsts.h" | |
| 13 | |
| 14 struct nsIntRect; | |
| 15 | |
| 16 namespace mozilla { | |
| 17 namespace gl { | |
| 18 | |
| 19 class GLContext; | |
| 20 class TextureImage; | |
| 21 | |
| 22 class GLBlitTextureImageHelper MOZ_FINAL | |
| 23 { | |
| 24 // The GLContext is the sole owner of the GLBlitTextureImageHelper. | |
| 25 GLContext* mGL; | |
| 26 | |
| 27 // lazy-initialized things | |
| 28 GLuint mBlitProgram, mBlitFramebuffer; | |
| 29 void UseBlitProgram(); | |
| 30 void SetBlitFramebufferForDestTexture(GLuint aTexture); | |
| 31 | |
| 32 public: | |
| 33 | |
| 34 GLBlitTextureImageHelper(GLContext *gl); | |
| 35 ~GLBlitTextureImageHelper(); | |
| 36 | |
| 37 /** | |
| 38 * Copy a rectangle from one TextureImage into another. The | |
| 39 * source and destination are given in integer coordinates, and | |
| 40 * will be converted to texture coordinates. | |
| 41 * | |
| 42 * For the source texture, the wrap modes DO apply -- it's valid | |
| 43 * to use REPEAT or PAD and expect appropriate behaviour if the source | |
| 44 * rectangle extends beyond its bounds. | |
| 45 * | |
| 46 * For the destination texture, the wrap modes DO NOT apply -- the | |
| 47 * destination will be clipped by the bounds of the texture. | |
| 48 * | |
| 49 * Note: calling this function will cause the following OpenGL state | |
| 50 * to be changed: | |
| 51 * | |
| 52 * - current program | |
| 53 * - framebuffer binding | |
| 54 * - viewport | |
| 55 * - blend state (will be enabled at end) | |
| 56 * - scissor state (will be enabled at end) | |
| 57 * - vertex attrib 0 and 1 (pointer and enable state [enable state will be disabled at exit]) | |
| 58 * - array buffer binding (will be 0) | |
| 59 * - active texture (will be 0) | |
| 60 * - texture 0 binding | |
| 61 */ | |
| 62 void BlitTextureImage(TextureImage *aSrc, const nsIntRect& aSrcRect, | |
| 63 TextureImage *aDst, const nsIntRect& aDstRect); | |
| 64 }; | |
| 65 | |
| 66 } | |
| 67 } | |
| 68 | |
| 69 #endif // GLBLITTEXTUREIMAGEHELPER_H_ |
