1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_UI_PATCH_H
#define ANDROID_UI_PATCH_H
#include <sys/types.h>
#include <cstring>
#include "Vertex.h"
namespace android {
namespace uirenderer {
/**
* Description of a patch.
*/
struct PatchDescription {
PatchDescription(): xCount(0), yCount(0) { }
PatchDescription(const uint32_t xCount, const uint32_t yCount):
xCount(xCount), yCount(yCount) { }
PatchDescription(const PatchDescription& description):
xCount(description.xCount), yCount(description.yCount) { }
uint32_t xCount;
uint32_t yCount;
bool operator<(const PatchDescription& rhs) const {
if (xCount == rhs.xCount) {
return yCount < rhs.yCount;
}
return xCount < rhs.xCount;
}
bool operator==(const PatchDescription& rhs) const {
return xCount == rhs.xCount && yCount == rhs.yCount;
}
}; // struct PatchDescription
/**
* An OpenGL patch. This contains an array of vertices and an array of
* indices to render the vertices.
*/
struct Patch {
Patch(const uint32_t xCount, const uint32_t yCount): xCount(xCount + 2), yCount(yCount + 2) {
verticesCount = (xCount + 2) * (yCount + 2);
vertices = new TextureVertex[verticesCount];
// 2 triangles per patch, 3 vertices per triangle
indicesCount = (xCount + 1) * (yCount + 1) * 2 * 3;
indices = new uint16_t[indicesCount];
const uint32_t xNum = xCount + 1;
const uint32_t yNum = yCount + 1;
uint16_t* startIndices = indices;
uint32_t n = 0;
for (uint32_t y = 0; y < yNum; y++) {
for (uint32_t x = 0; x < xNum; x++) {
*startIndices++ = n;
*startIndices++ = n + 1;
*startIndices++ = n + xNum + 2;
*startIndices++ = n;
*startIndices++ = n + xNum + 2;
*startIndices++ = n + xNum + 1;
n += 1;
}
n += 1;
}
}
~Patch() {
delete indices;
delete vertices;
}
void dump() {
LOGD("Vertices [");
for (uint32_t y = 0; y < yCount; y++) {
char buffer[512];
buffer[0] = '\0';
uint32_t offset = 0;
for (uint32_t x = 0; x < xCount; x++) {
TextureVertex* v = &vertices[y * xCount + x];
offset += sprintf(&buffer[offset], " (%.4f,%.4f)-(%.4f,%.4f)",
v->position[0], v->position[1], v->texture[0], v->texture[1]);
}
LOGD(" [%s ]", buffer);
}
LOGD("]\nIndices [ ");
char buffer[4096];
buffer[0] = '\0';
uint32_t offset = 0;
for (uint32_t i = 0; i < indicesCount; i++) {
offset += sprintf(&buffer[offset], "%d ", indices[i]);
}
LOGD(" %s\n]", buffer);
}
uint32_t xCount;
uint32_t yCount;
uint16_t* indices;
uint32_t indicesCount;
TextureVertex* vertices;
uint32_t verticesCount;
}; // struct Patch
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_UI_PATCH_H
|
