Patch.h revision a5ef39a21683189e5906c9f252b997f0508e350d 
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#include "utils/Compare.h"
29
30namespace android {
31namespace uirenderer {
32
33///////////////////////////////////////////////////////////////////////////////
34// 9-patch structures
35///////////////////////////////////////////////////////////////////////////////
36
37/**
38 * An OpenGL patch. This contains an array of vertices and an array of
39 * indices to render the vertices.
40 */
41struct Patch {
42    Patch(const uint32_t xCount, const uint32_t yCount, const int8_t emptyQuads = 0);
43    ~Patch();
44
45    void updateVertices(const float bitmapWidth, const float bitmapHeight,
46            float left, float top, float right, float bottom);
47
48    void updateColorKey(const uint32_t colorKey);
49    void copy(const int32_t* xDivs, const int32_t* yDivs);
50    bool matches(const int32_t* xDivs, const int32_t* yDivs, const uint32_t colorKey);
51
52    GLuint meshBuffer;
53    uint32_t verticesCount;
54    bool hasEmptyQuads;
55#if RENDER_LAYERS_AS_REGIONS
56    Vector<Rect> quads;
57#endif
58
59private:
60    TextureVertex* mVertices;
61    bool mUploaded;
62
63    int32_t* mXDivs;
64    int32_t* mYDivs;
65    uint32_t mColorKey;
66
67    uint32_t mXCount;
68    uint32_t mYCount;
69    int8_t mEmptyQuads;
70
71    void copy(const int32_t* yDivs);
72
73    void generateRow(TextureVertex*& vertex, float y1, float y2,
74            float v1, float v2, float stretchX, float width, float bitmapWidth,
75            uint32_t& quadCount);
76    void generateQuad(TextureVertex*& vertex,
77            float x1, float y1, float x2, float y2,
78            float u1, float v1, float u2, float v2,
79            uint32_t& quadCount);
80}; // struct Patch
81
82}; // namespace uirenderer
83}; // namespace android
84
85#endif // ANDROID_HWUI_PATCH_H
86