1 /*
2 * Copyright (C) 2013 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 #define LOG_TAG "OpenGLRenderer"
18
19 #include "AssetAtlas.h"
20 #include "Caches.h"
21
22 #include <GLES2/gl2ext.h>
23
24 namespace android {
25 namespace uirenderer {
26
27 ///////////////////////////////////////////////////////////////////////////////
28 // Lifecycle
29 ///////////////////////////////////////////////////////////////////////////////
30
init(sp<GraphicBuffer> buffer,int * map,int count)31 void AssetAtlas::init(sp<GraphicBuffer> buffer, int* map, int count) {
32 if (mImage) {
33 return;
34 }
35
36 mImage = new Image(buffer);
37
38 if (mImage->getTexture()) {
39 Caches& caches = Caches::getInstance();
40
41 mTexture = new Texture(caches);
42 mTexture->id = mImage->getTexture();
43 mTexture->width = buffer->getWidth();
44 mTexture->height = buffer->getHeight();
45
46 createEntries(caches, map, count);
47 } else {
48 ALOGW("Could not create atlas image");
49
50 delete mImage;
51 mImage = NULL;
52 mTexture = NULL;
53 }
54
55 mGenerationId++;
56 }
57
terminate()58 void AssetAtlas::terminate() {
59 if (mImage) {
60 delete mImage;
61 mImage = NULL;
62
63 delete mTexture;
64 mTexture = NULL;
65
66 for (size_t i = 0; i < mEntries.size(); i++) {
67 delete mEntries.valueAt(i);
68 }
69 mEntries.clear();
70 }
71 }
72
73 ///////////////////////////////////////////////////////////////////////////////
74 // Entries
75 ///////////////////////////////////////////////////////////////////////////////
76
getEntry(SkBitmap * const bitmap) const77 AssetAtlas::Entry* AssetAtlas::getEntry(SkBitmap* const bitmap) const {
78 ssize_t index = mEntries.indexOfKey(bitmap);
79 return index >= 0 ? mEntries.valueAt(index) : NULL;
80 }
81
getEntryTexture(SkBitmap * const bitmap) const82 Texture* AssetAtlas::getEntryTexture(SkBitmap* const bitmap) const {
83 ssize_t index = mEntries.indexOfKey(bitmap);
84 return index >= 0 ? mEntries.valueAt(index)->texture : NULL;
85 }
86
87 /**
88 * Delegates changes to wrapping and filtering to the base atlas texture
89 * instead of applying the changes to the virtual textures.
90 */
91 struct DelegateTexture: public Texture {
DelegateTextureandroid::uirenderer::DelegateTexture92 DelegateTexture(Caches& caches, Texture* delegate): Texture(caches), mDelegate(delegate) { }
93
setWrapSTandroid::uirenderer::DelegateTexture94 virtual void setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture = false,
95 bool force = false, GLenum renderTarget = GL_TEXTURE_2D) {
96 mDelegate->setWrapST(wrapS, wrapT, bindTexture, force, renderTarget);
97 }
98
setFilterMinMagandroid::uirenderer::DelegateTexture99 virtual void setFilterMinMag(GLenum min, GLenum mag, bool bindTexture = false,
100 bool force = false, GLenum renderTarget = GL_TEXTURE_2D) {
101 mDelegate->setFilterMinMag(min, mag, bindTexture, force, renderTarget);
102 }
103
104 private:
105 Texture* const mDelegate;
106 }; // struct DelegateTexture
107
108 /**
109 * TODO: This method does not take the rotation flag into account
110 */
createEntries(Caches & caches,int * map,int count)111 void AssetAtlas::createEntries(Caches& caches, int* map, int count) {
112 const float width = float(mTexture->width);
113 const float height = float(mTexture->height);
114
115 for (int i = 0; i < count; ) {
116 SkBitmap* bitmap = (SkBitmap*) map[i++];
117 int x = map[i++];
118 int y = map[i++];
119 bool rotated = map[i++] > 0;
120
121 // Bitmaps should never be null, we're just extra paranoid
122 if (!bitmap) continue;
123
124 const UvMapper mapper(
125 x / width, (x + bitmap->width()) / width,
126 y / height, (y + bitmap->height()) / height);
127
128 Texture* texture = new DelegateTexture(caches, mTexture);
129 texture->id = mTexture->id;
130 texture->blend = !bitmap->isOpaque();
131 texture->width = bitmap->width();
132 texture->height = bitmap->height();
133
134 Entry* entry = new Entry(bitmap, x, y, rotated, texture, mapper, *this);
135 texture->uvMapper = &entry->uvMapper;
136
137 mEntries.add(entry->bitmap, entry);
138 }
139 }
140
141 }; // namespace uirenderer
142 }; // namespace android
143