2 * Copyright (C) 2012 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #ifndef ANDROID_HWUI_DITHER_H
18 #define ANDROID_HWUI_DITHER_H
20 #include <GLES3/gl3.h>
23 namespace uirenderer {
29 // Must be a power of two
30 #define DITHER_KERNEL_SIZE 4
31 // These must not use the .0f notation as they are used from GLSL
32 #define DITHER_KERNEL_SIZE_INV (1.0 / 4.0)
33 #define DITHER_KERNEL_SIZE_INV_SQUARE (1.0 / 16.0)
36 * Handles dithering for programs.
40 Dither(Caches& caches);
43 void setupProgram(Program& program, GLuint* textureUnit);
46 void bindDitherTexture();
50 GLuint mDitherTexture;
53 }; // namespace uirenderer
54 }; // namespace android
56 #endif // ANDROID_HWUI_DITHER_H