RenderEngine.h revision 3f84483382be2d528918cc1a6fbc6a7d68e0b181 
1/*
2 * Copyright 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
18#ifndef SF_RENDERENGINE_H_
19#define SF_RENDERENGINE_H_
20
21#include <stdint.h>
22#include <sys/types.h>
23
24#include <EGL/egl.h>
25#include <EGL/eglext.h>
26
27// ---------------------------------------------------------------------------
28namespace android {
29// ---------------------------------------------------------------------------
30
31class String8;
32class Rect;
33class Region;
34class Mesh;
35
36class RenderEngine {
37    enum GlesVersion {
38        GLES_VERSION_1_0    = 0x10000,
39        GLES_VERSION_1_1    = 0x10001,
40        GLES_VERSION_2_0    = 0x20000,
41        GLES_VERSION_3_0    = 0x30000,
42    };
43    static GlesVersion parseGlesVersion(const char* str);
44
45    EGLContext mEGLContext;
46    void setEGLContext(EGLContext ctxt);
47
48protected:
49    RenderEngine();
50    virtual ~RenderEngine() = 0;
51
52public:
53    static RenderEngine* create(EGLDisplay display, EGLConfig config);
54
55    // helpers
56    void clearWithColor(float red, float green, float blue, float alpha);
57    void fillRegionWithColor(const Region& region, uint32_t height,
58            float red, float green, float blue, float alpha);
59
60    // common to all GL versions
61    void setScissor(uint32_t left, uint32_t bottom, uint32_t right, uint32_t top);
62    void disableScissor();
63    void genTextures(size_t count, uint32_t* names);
64    void deleteTextures(size_t count, uint32_t const* names);
65
66    class BindImageAsFramebuffer {
67        RenderEngine& mEngine;
68        unsigned int mTexName, mFbName;
69        unsigned int mStatus;
70    public:
71        BindImageAsFramebuffer(RenderEngine& engine, EGLImageKHR image);
72        ~BindImageAsFramebuffer();
73        int getStatus() const;
74    };
75
76    // set-up
77    virtual void checkErrors() const;
78    virtual void dump(String8& result) = 0;
79    virtual void setViewportAndProjection(size_t vpw, size_t vph, size_t w, size_t h, bool yswap) = 0;
80    virtual void setupLayerBlending(bool premultipliedAlpha, bool opaque, int alpha) = 0;
81    virtual void setupDimLayerBlending(int alpha) = 0;
82    virtual void setupLayerTexturing(size_t textureName, bool useFiltering, const float* textureMatrix) = 0;
83    virtual void setupLayerBlackedOut() = 0;
84
85    virtual void disableTexturing() = 0;
86    virtual void disableBlending() = 0;
87
88    // drawing
89    virtual void fillWithColor(const Mesh& mesh, float r, float g, float b, float a) = 0;
90    virtual void drawMesh(const Mesh& mesh) = 0;
91
92    // queries
93    virtual size_t getMaxTextureSize() const = 0;
94    virtual size_t getMaxViewportDims() const = 0;
95
96
97
98    EGLContext getEGLContext() const;
99};
100
101// ---------------------------------------------------------------------------
102}; // namespace android
103// ---------------------------------------------------------------------------
104
105#endif /* SF_RENDERENGINE_H_ */
106