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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_PATCH_H
     18 #define ANDROID_HWUI_PATCH_H
     19 
     20 #include <sys/types.h>
     21 
     22 #include <GLES2/gl2.h>
     23 
     24 #include <androidfw/ResourceTypes.h>
     25 
     26 #include "Rect.h"
     27 #include "UvMapper.h"
     28 
     29 #include <vector>
     30 
     31 namespace android {
     32 namespace uirenderer {
     33 
     34 struct TextureVertex;
     35 
     36 ///////////////////////////////////////////////////////////////////////////////
     37 // 9-patch structures
     38 ///////////////////////////////////////////////////////////////////////////////
     39 
     40 class Patch {
     41 public:
     42     Patch(const float bitmapWidth, const float bitmapHeight, float width, float height,
     43           const UvMapper& mapper, const Res_png_9patch* patch);
     44 
     45     /**
     46      * Returns the size of this patch's mesh in bytes.
     47      */
     48     uint32_t getSize() const;
     49 
     50     std::unique_ptr<TextureVertex[]> vertices;
     51     uint32_t verticesCount = 0;
     52     uint32_t indexCount = 0;
     53     bool hasEmptyQuads = false;
     54     std::vector<Rect> quads;
     55 
     56     GLintptr positionOffset = 0;
     57     GLintptr textureOffset = 0;
     58 
     59 private:
     60     void generateRow(const int32_t* xDivs, uint32_t xCount, TextureVertex*& vertex, float y1,
     61                      float y2, float v1, float v2, float stretchX, float rescaleX, float width,
     62                      float bitmapWidth, uint32_t& quadCount);
     63     void generateQuad(TextureVertex*& vertex, float x1, float y1, float x2, float y2, float u1,
     64                       float v1, float u2, float v2, uint32_t& quadCount);
     65 
     66     const uint32_t* mColors;
     67     UvMapper mUvMapper;
     68 };  // struct Patch
     69 
     70 };  // namespace uirenderer
     71 };  // namespace android
     72 
     73 #endif  // ANDROID_HWUI_PATCH_H
     74