Layer.h revision 8550c4c7b5952b7a4e1e0ede95c9492d03099a13 
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_LAYER_H
18#define ANDROID_UI_LAYER_H
19
20#include <sys/types.h>
21
22#include <GLES2/gl2.h>
23
24#include <SkXfermode.h>
25
26#include "Rect.h"
27
28namespace android {
29namespace uirenderer {
30
31///////////////////////////////////////////////////////////////////////////////
32// Layers
33///////////////////////////////////////////////////////////////////////////////
34
35/**
36 * A layer has dimensions and is backed by an OpenGL texture or FBO.
37 */
38struct Layer {
39    Layer(const uint32_t layerWidth, const uint32_t layerHeight):
40            width(layerWidth), height(layerHeight) {
41    }
42
43    /**
44     * Bounds of the layer.
45     */
46    Rect layer;
47    /**
48     * Texture coordinates of the layer.
49     */
50    Rect texCoords;
51
52    /**
53     * Name of the FBO used to render the layer. If the name is 0
54     * this layer is not backed by an FBO, but a simple texture.
55     */
56    GLuint fbo;
57
58    /**
59     * Opacity of the layer.
60     */
61    int alpha;
62    /**
63     * Blending mode of the layer.
64     */
65    SkXfermode::Mode mode;
66    /**
67     * Indicates whether this layer should be blended.
68     */
69    bool blend;
70
71    /**
72     * Indicates whether this layer has been used already.
73     */
74    bool empty;
75
76    /**
77     * Name of the texture used to render the layer.
78     */
79    GLuint texture;
80    /**
81     * Width of the layer texture.
82     */
83    uint32_t width;
84    /**
85     * Height of the layer texture.
86     */
87    uint32_t height;
88}; // struct Layer
89
90}; // namespace uirenderer
91}; // namespace android
92
93#endif // ANDROID_UI_LAYER_H
94