Patch.h revision 2665b85b2bd08faabf7c520a622a0e4d3465245f 
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_UI_PATCH_H
18#define ANDROID_UI_PATCH_H
19
20#include <sys/types.h>
21
22#include <GLES2/gl2.h>
23
24#include "Vertex.h"
25#include "utils/Compare.h"
26
27namespace android {
28namespace uirenderer {
29
30///////////////////////////////////////////////////////////////////////////////
31// 9-patch structures
32///////////////////////////////////////////////////////////////////////////////
33
34/**
35 * Description of a patch.
36 */
37struct PatchDescription {
38    PatchDescription(): bitmapWidth(0), bitmapHeight(0), pixelWidth(0), pixelHeight(0),
39            xCount(0), yCount(0), emptyCount(0), colorKey(0) { }
40    PatchDescription(const float bitmapWidth, const float bitmapHeight,
41            const float pixelWidth, const float pixelHeight,
42            const uint32_t xCount, const uint32_t yCount,
43            const int8_t emptyCount, const uint32_t colorKey):
44            bitmapWidth(bitmapWidth), bitmapHeight(bitmapHeight),
45            pixelWidth(pixelWidth), pixelHeight(pixelHeight),
46            xCount(xCount), yCount(yCount),
47            emptyCount(emptyCount), colorKey(colorKey) { }
48    PatchDescription(const PatchDescription& description):
49            bitmapWidth(description.bitmapWidth), bitmapHeight(description.bitmapHeight),
50            pixelWidth(description.pixelWidth), pixelHeight(description.pixelHeight),
51            xCount(description.xCount), yCount(description.yCount),
52            emptyCount(description.emptyCount), colorKey(description.colorKey) { }
53
54    float bitmapWidth;
55    float bitmapHeight;
56    float pixelWidth;
57    float pixelHeight;
58    uint32_t xCount;
59    uint32_t yCount;
60    int8_t emptyCount;
61    uint32_t colorKey;
62
63    bool operator<(const PatchDescription& rhs) const {
64        LTE_FLOAT(bitmapWidth) {
65            LTE_FLOAT(bitmapHeight) {
66                LTE_FLOAT(pixelWidth) {
67                    LTE_FLOAT(pixelHeight) {
68                        LTE_INT(xCount) {
69                            LTE_INT(yCount) {
70                                LTE_INT(emptyCount) {
71                                    LTE_INT(colorKey) return false;
72                                }
73                            }
74                        }
75                    }
76                }
77            }
78        }
79        return false;
80    }
81}; // struct PatchDescription
82
83/**
84 * An OpenGL patch. This contains an array of vertices and an array of
85 * indices to render the vertices.
86 */
87struct Patch {
88    Patch(const uint32_t xCount, const uint32_t yCount, const int8_t emptyQuads = 0);
89    ~Patch();
90
91    void updateVertices(const float bitmapWidth, const float bitmapHeight,
92            float left, float top, float right, float bottom,
93            const int32_t* xDivs, const int32_t* yDivs,
94            const uint32_t width, const uint32_t height,
95            const uint32_t colorKey = 0);
96
97    GLuint meshBuffer;
98    uint32_t verticesCount;
99
100private:
101    TextureVertex* mVertices;
102
103    static inline void generateRow(TextureVertex*& vertex, float y1, float y2,
104            float v1, float v2, const int32_t xDivs[], uint32_t xCount,
105            float stretchX, float width, float bitmapWidth,
106            uint32_t& quadCount, const uint32_t colorKey);
107    static inline void generateQuad(TextureVertex*& vertex,
108            float x1, float y1, float x2, float y2,
109            float u1, float v1, float u2, float v2,
110            uint32_t& quadCount, const uint32_t colorKey);
111}; // struct Patch
112
113}; // namespace uirenderer
114}; // namespace android
115
116#endif // ANDROID_UI_PATCH_H
117