/libs/hwui/Patch.h

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