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_GLES20RENDERENGINE_H_
19#define SF_GLES20RENDERENGINE_H_
20
21#include <stdint.h>
22#include <sys/types.h>
23
24#include <GLES2/gl2.h>
25#include <Transform.h>
26
27#include "RenderEngine.h"
28#include "ProgramCache.h"
29#include "Description.h"
30
31// ---------------------------------------------------------------------------
32namespace android {
33// ---------------------------------------------------------------------------
34
35class String8;
36class Mesh;
37class Texture;
38
39class GLES20RenderEngine : public RenderEngine {
40    GLuint mProtectedTexName;
41    GLint mMaxViewportDims[2];
42    GLint mMaxTextureSize;
43    GLuint mVpWidth;
44    GLuint mVpHeight;
45
46    struct Group {
47        GLuint texture;
48        GLuint fbo;
49        GLuint width;
50        GLuint height;
51        mat4 colorTransform;
52    };
53
54    Description mState;
55    Vector<Group> mGroupStack;
56
57    virtual void bindImageAsFramebuffer(EGLImageKHR image,
58            uint32_t* texName, uint32_t* fbName, uint32_t* status);
59    virtual void unbindFramebuffer(uint32_t texName, uint32_t fbName);
60
61public:
62    GLES20RenderEngine();
63
64protected:
65    virtual ~GLES20RenderEngine();
66
67    virtual void dump(String8& result);
68    virtual void setViewportAndProjection(size_t vpw, size_t vph,
69            Rect sourceCrop, size_t hwh, bool yswap,
70            Transform::orientation_flags rotation);
71#ifdef USE_HWC2
72    virtual void setupLayerBlending(bool premultipliedAlpha, bool opaque,
73            float alpha) override;
74    virtual void setupDimLayerBlending(float alpha) override;
75
76    // Color management related functions and state
77    void setColorMode(android_color_mode mode);
78    void setSourceDataSpace(android_dataspace source);
79    void setWideColor(bool hasWideColor);
80    bool usesWideColor();
81
82    // Current color mode of display using the render engine
83    android_color_mode mColorMode = HAL_COLOR_MODE_NATIVE;
84
85    // Current dataspace of layer being rendered
86    android_dataspace mDataSpace = HAL_DATASPACE_V0_SRGB;
87
88    // Indicate if wide-color mode is needed or not
89    bool mPlatformHasWideColor = false;
90    bool mDisplayHasWideColor = false;
91    bool mUseWideColor = false;
92    uint64_t mWideColorFrameCount = 0;
93
94    // Currently only supporting sRGB and DisplayP3 color spaces
95    mat4 mSrgbToDisplayP3;
96#else
97    virtual void setupLayerBlending(bool premultipliedAlpha, bool opaque,
98            int alpha);
99    virtual void setupDimLayerBlending(int alpha);
100#endif
101    virtual void setupLayerTexturing(const Texture& texture);
102    virtual void setupLayerBlackedOut();
103    virtual void setupFillWithColor(float r, float g, float b, float a);
104    virtual mat4 setupColorTransform(const mat4& colorTransform);
105    virtual void disableTexturing();
106    virtual void disableBlending();
107
108    virtual void drawMesh(const Mesh& mesh);
109
110    virtual size_t getMaxTextureSize() const;
111    virtual size_t getMaxViewportDims() const;
112};
113
114// ---------------------------------------------------------------------------
115}; // namespace android
116// ---------------------------------------------------------------------------
117
118#endif /* SF_GLES20RENDERENGINE_H_ */
119