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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 <utils/Vector.h>
     25 
     26 #include "Rect.h"
     27 #include "Vertex.h"
     28 
     29 namespace android {
     30 namespace uirenderer {
     31 
     32 ///////////////////////////////////////////////////////////////////////////////
     33 // Defines
     34 ///////////////////////////////////////////////////////////////////////////////
     35 
     36 #define EXPLODE_GAP 4
     37 
     38 ///////////////////////////////////////////////////////////////////////////////
     39 // 9-patch structures
     40 ///////////////////////////////////////////////////////////////////////////////
     41 
     42 /**
     43  * An OpenGL patch. This contains an array of vertices and an array of
     44  * indices to render the vertices.
     45  */
     46 struct Patch {
     47     Patch(const uint32_t xCount, const uint32_t yCount, const int8_t emptyQuads);
     48     ~Patch();
     49 
     50     void updateVertices(const float bitmapWidth, const float bitmapHeight,
     51             float left, float top, float right, float bottom);
     52 
     53     void updateColorKey(const uint32_t colorKey);
     54     void copy(const int32_t* xDivs, const int32_t* yDivs);
     55     bool matches(const int32_t* xDivs, const int32_t* yDivs,
     56             const uint32_t colorKey, const int8_t emptyQuads);
     57 
     58     GLuint meshBuffer;
     59     uint32_t verticesCount;
     60     bool hasEmptyQuads;
     61     Vector<Rect> quads;
     62 
     63 private:
     64     TextureVertex* mVertices;
     65     uint32_t mAllocatedVerticesCount;
     66 
     67     int32_t* mXDivs;
     68     int32_t* mYDivs;
     69     uint32_t mColorKey;
     70 
     71     uint32_t mXCount;
     72     uint32_t mYCount;
     73     int8_t mEmptyQuads;
     74 
     75     void generateRow(TextureVertex*& vertex, float y1, float y2,
     76             float v1, float v2, float stretchX, float rescaleX,
     77             float width, float bitmapWidth, uint32_t& quadCount);
     78     void generateQuad(TextureVertex*& vertex,
     79             float x1, float y1, float x2, float y2,
     80             float u1, float v1, float u2, float v2,
     81             uint32_t& quadCount);
     82 }; // struct Patch
     83 
     84 }; // namespace uirenderer
     85 }; // namespace android
     86 
     87 #endif // ANDROID_HWUI_PATCH_H
     88