4abab937bf
Bug #8586560 And I don't deserve to pass the test. Change-Id: Ic7886205511f16145a925fc860e4a03dfaf473d5
97 lines
3.4 KiB
C++
97 lines
3.4 KiB
C++
/*
|
|
* 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.
|
|
*/
|
|
|
|
#include "Caches.h"
|
|
#include "Dither.h"
|
|
|
|
namespace android {
|
|
namespace uirenderer {
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// Lifecycle
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
void Dither::bindDitherTexture() {
|
|
if (!mInitialized) {
|
|
bool useFloatTexture = Extensions::getInstance().getMajorGlVersion() >= 3;
|
|
|
|
glGenTextures(1, &mDitherTexture);
|
|
glBindTexture(GL_TEXTURE_2D, mDitherTexture);
|
|
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
|
|
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
|
|
|
|
if (useFloatTexture) {
|
|
// We use a R16F texture, let's remap the alpha channel to the
|
|
// red channel to avoid changing the shader sampling code on GL ES 3.0+
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_A, GL_RED);
|
|
|
|
float dither = 1.0f / (255.0f * DITHER_KERNEL_SIZE * DITHER_KERNEL_SIZE);
|
|
const GLfloat pattern[] = {
|
|
0 * dither, 8 * dither, 2 * dither, 10 * dither,
|
|
12 * dither, 4 * dither, 14 * dither, 6 * dither,
|
|
3 * dither, 11 * dither, 1 * dither, 9 * dither,
|
|
15 * dither, 7 * dither, 13 * dither, 5 * dither
|
|
};
|
|
|
|
glPixelStorei(GL_UNPACK_ALIGNMENT, sizeof(GLfloat));
|
|
glTexImage2D(GL_TEXTURE_2D, 0, GL_R16F, DITHER_KERNEL_SIZE, DITHER_KERNEL_SIZE, 0,
|
|
GL_RED, GL_FLOAT, &pattern);
|
|
} else {
|
|
const uint8_t pattern[] = {
|
|
0, 8, 2, 10,
|
|
12, 4, 14, 6,
|
|
3, 11, 1, 9,
|
|
15, 7, 13, 5
|
|
};
|
|
|
|
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
|
|
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, DITHER_KERNEL_SIZE, DITHER_KERNEL_SIZE, 0,
|
|
GL_ALPHA, GL_UNSIGNED_BYTE, &pattern);
|
|
}
|
|
|
|
mInitialized = true;
|
|
} else {
|
|
glBindTexture(GL_TEXTURE_2D, mDitherTexture);
|
|
}
|
|
}
|
|
|
|
void Dither::clear() {
|
|
if (mInitialized) {
|
|
glDeleteTextures(1, &mDitherTexture);
|
|
mInitialized = false;
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// Program management
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
void Dither::setupProgram(Program* program, GLuint* textureUnit) {
|
|
GLuint textureSlot = (*textureUnit)++;
|
|
Caches::getInstance().activeTexture(textureSlot);
|
|
|
|
bindDitherTexture();
|
|
|
|
glUniform1i(program->getUniform("ditherSampler"), textureSlot);
|
|
}
|
|
|
|
}; // namespace uirenderer
|
|
}; // namespace android
|