1 /*
2  * Copyright (C) 2010 The Android Open Source Project
3  *
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
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
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.
15  */
16 
17 #include "GammaFontRenderer.h"
18 #include "Debug.h"
19 #include "Properties.h"
20 
21 namespace android {
22 namespace uirenderer {
23 
GammaFontRenderer()24 GammaFontRenderer::GammaFontRenderer() {
25     INIT_LOGD("Creating lookup gamma font renderer");
26 
27 #ifndef ANDROID_ENABLE_LINEAR_BLENDING
28     // Compute the gamma tables
29     const float gamma = 1.0f / Properties::textGamma;
30     for (uint32_t i = 0; i <= 255; i++) {
31         mGammaTable[i] = uint8_t((float)::floor(pow(i / 255.0f, gamma) * 255.0f + 0.5f));
32     }
33 #endif
34 }
35 
endPrecaching()36 void GammaFontRenderer::endPrecaching() {
37     if (mRenderer) {
38         mRenderer->endPrecaching();
39     }
40 }
41 
42 };  // namespace uirenderer
43 };  // namespace android
44