Texture.h revision 8aa195d7081b889f3a7b1f426cbd8556377aae5e 
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_HWUI_TEXTURE_H
18#define ANDROID_HWUI_TEXTURE_H
19
20#include <GLES2/gl2.h>
21
22namespace android {
23namespace uirenderer {
24
25class Caches;
26class UvMapper;
27
28/**
29 * Represents an OpenGL texture.
30 */
31class Texture {
32public:
33    Texture();
34    Texture(Caches& caches);
35
36    virtual ~Texture() { }
37
38    inline void setWrap(GLenum wrap, bool bindTexture = false, bool force = false,
39                GLenum renderTarget = GL_TEXTURE_2D) {
40        setWrapST(wrap, wrap, bindTexture, force, renderTarget);
41    }
42
43    virtual void setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture = false,
44            bool force = false, GLenum renderTarget = GL_TEXTURE_2D);
45
46    inline void setFilter(GLenum filter, bool bindTexture = false, bool force = false,
47                GLenum renderTarget = GL_TEXTURE_2D) {
48        setFilterMinMag(filter, filter, bindTexture, force, renderTarget);
49    }
50
51    virtual void setFilterMinMag(GLenum min, GLenum mag, bool bindTexture = false,
52            bool force = false, GLenum renderTarget = GL_TEXTURE_2D);
53
54    /**
55     * Name of the texture.
56     */
57    GLuint id;
58    /**
59     * Generation of the backing bitmap,
60     */
61    uint32_t generation;
62    /**
63     * Indicates whether the texture requires blending.
64     */
65    bool blend;
66    /**
67     * Width of the backing bitmap.
68     */
69    uint32_t width;
70    /**
71     * Height of the backing bitmap.
72     */
73    uint32_t height;
74    /**
75     * Indicates whether this texture should be cleaned up after use.
76     */
77    bool cleanup;
78    /**
79     * Optional, size of the original bitmap.
80     */
81    uint32_t bitmapSize;
82    /**
83     * Indicates whether this texture will use trilinear filtering.
84     */
85    bool mipMap;
86
87    /**
88     * Optional, pointer to a texture coordinates mapper.
89     */
90    const UvMapper* uvMapper;
91
92private:
93    /**
94     * Last wrap modes set on this texture. Defaults to GL_CLAMP_TO_EDGE.
95     */
96    GLenum mWrapS;
97    GLenum mWrapT;
98
99    /**
100     * Last filters set on this texture. Defaults to GL_NEAREST.
101     */
102    GLenum mMinFilter;
103    GLenum mMagFilter;
104
105    bool mFirstFilter;
106    bool mFirstWrap;
107
108    Caches& mCaches;
109}; // struct Texture
110
111class AutoTexture {
112public:
113    AutoTexture(const Texture* texture): mTexture(texture) { }
114    ~AutoTexture() {
115        if (mTexture && mTexture->cleanup) {
116            glDeleteTextures(1, &mTexture->id);
117            delete mTexture;
118        }
119    }
120
121private:
122    const Texture* mTexture;
123}; // class AutoTexture
124
125}; // namespace uirenderer
126}; // namespace android
127
128#endif // ANDROID_HWUI_TEXTURE_H
129