| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ANDROID_HWUI_DITHER_H |
| #define ANDROID_HWUI_DITHER_H |
| |
| #include <GLES3/gl3.h> |
| |
| namespace android { |
| namespace uirenderer { |
| |
| class Caches; |
| class Program; |
| |
| // Must be a power of two |
| #define DITHER_KERNEL_SIZE 4 |
| // These must not use the .0f notation as they are used from GLSL |
| #define DITHER_KERNEL_SIZE_INV (1.0 / 4.0) |
| #define DITHER_KERNEL_SIZE_INV_SQUARE (1.0 / 16.0) |
| |
| /** |
| * Handles dithering for programs. |
| */ |
| class Dither { |
| public: |
| Dither(); |
| |
| void clear(); |
| void setupProgram(Program* program, GLuint* textureUnit); |
| |
| private: |
| void bindDitherTexture(); |
| |
| Caches* mCaches; |
| bool mInitialized; |
| GLuint mDitherTexture; |
| }; |
| |
| }; // namespace uirenderer |
| }; // namespace android |
| |
| #endif // ANDROID_HWUI_DITHER_H |