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      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 #ifndef ANDROID_HWUI_GAMMA_FONT_RENDERER_H
     18 #define ANDROID_HWUI_GAMMA_FONT_RENDERER_H
     19 
     20 #include "FontRenderer.h"
     21 
     22 namespace android {
     23 namespace uirenderer {
     24 
     25 class GammaFontRenderer {
     26 public:
     27     GammaFontRenderer();
     28 
     29     void clear() { mRenderer.reset(nullptr); }
     30 
     31     void flush() {
     32         if (mRenderer) {
     33             mRenderer->flushLargeCaches();
     34         }
     35     }
     36 
     37     FontRenderer& getFontRenderer() {
     38         if (!mRenderer) {
     39             const uint8_t* table = nullptr;
     40 #ifndef ANDROID_ENABLE_LINEAR_BLENDING
     41             table = &mGammaTable[0];
     42 #endif
     43             mRenderer.reset(new FontRenderer(table));
     44         }
     45         return *mRenderer;
     46     }
     47 
     48     void dumpMemoryUsage(String8& log) const {
     49         if (mRenderer) {
     50             mRenderer->dumpMemoryUsage(log);
     51         } else {
     52             log.appendFormat("FontRenderer doesn't exist.\n");
     53         }
     54     }
     55 
     56     uint32_t getSize() const { return mRenderer ? mRenderer->getSize() : 0; }
     57 
     58     void endPrecaching();
     59 
     60 private:
     61     std::unique_ptr<FontRenderer> mRenderer;
     62 #ifndef ANDROID_ENABLE_LINEAR_BLENDING
     63     uint8_t mGammaTable[256];
     64 #endif
     65 };
     66 
     67 };  // namespace uirenderer
     68 };  // namespace android
     69 
     70 #endif  // ANDROID_HWUI_GAMMA_FONT_RENDERER_H
     71