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 "Debug.h" 18 #include "GammaFontRenderer.h" 19 #include "Properties.h" 20 21 namespace android { 22 namespace uirenderer { 23 24 GammaFontRenderer::GammaFontRenderer() { 25 INIT_LOGD("Creating lookup gamma font renderer"); 26 27 // Compute the gamma tables 28 const float gamma = 1.0f / Properties::textGamma; 29 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 } 34 35 void GammaFontRenderer::endPrecaching() { 36 if (mRenderer) { 37 mRenderer->endPrecaching(); 38 } 39 } 40 41 }; // namespace uirenderer 42 }; // namespace android 43
