Layer.h revision eb99356a0548684a501766e6a524529ab93304c8 
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 * Dimensions of a layer.
33 */
34struct LayerSize {
35    LayerSize(): width(0), height(0) { }
36    LayerSize(const uint32_t width, const uint32_t height): width(width), height(height) { }
37    LayerSize(const LayerSize& size): width(size.width), height(size.height) { }
38
39    uint32_t width;
40    uint32_t height;
41
42    bool operator<(const LayerSize& rhs) const {
43        if (width == rhs.width) {
44            return height < rhs.height;
45        }
46        return width < rhs.width;
47    }
48
49    bool operator==(const LayerSize& rhs) const {
50        return width == rhs.width && height == rhs.height;
51    }
52}; // struct LayerSize
53
54/**
55 * A layer has dimensions and is backed by an OpenGL texture or FBO.
56 */
57struct Layer {
58    /**
59     * Coordinates of the layer.
60     */
61    Rect layer;
62    /**
63     * Name of the texture used to render the layer.
64     */
65    GLuint texture;
66    /**
67     * Name of the FBO used to render the layer. If the name is 0
68     * this layer is not backed by an FBO, but a simple texture.
69     */
70    GLuint fbo;
71    /**
72     * Opacity of the layer.
73     */
74    int alpha;
75    /**
76     * Blending mode of the layer.
77     */
78    SkXfermode::Mode mode;
79    /**
80     * Indicates whether this layer should be blended.
81     */
82    bool blend;
83    /**
84     * Indicates whether this layer has been used already.
85     */
86    bool empty;
87}; // struct Layer
88
89}; // namespace uirenderer
90}; // namespace android
91
92#endif // ANDROID_UI_LAYER_H
93