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 // ---------------------------------------------------------------------------
32 namespace android {
33 // ---------------------------------------------------------------------------
34 
35 class String8;
36 class Mesh;
37 class Texture;
38 
39 class 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 
61 public:
62     GLES20RenderEngine();
63 
64 protected:
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 #else
76     virtual void setupLayerBlending(bool premultipliedAlpha, bool opaque,
77             int alpha);
78     virtual void setupDimLayerBlending(int alpha);
79 #endif
80     virtual void setupLayerTexturing(const Texture& texture);
81     virtual void setupLayerBlackedOut();
82     virtual void setupFillWithColor(float r, float g, float b, float a);
83     virtual mat4 setupColorTransform(const mat4& colorTransform);
84     virtual void disableTexturing();
85     virtual void disableBlending();
86 
87     virtual void drawMesh(const Mesh& mesh);
88 
89     virtual size_t getMaxTextureSize() const;
90     virtual size_t getMaxViewportDims() const;
91 };
92 
93 // ---------------------------------------------------------------------------
94 }; // namespace android
95 // ---------------------------------------------------------------------------
96 
97 #endif /* SF_GLES20RENDERENGINE_H_ */
98