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1 #pragma once
2 
3 #include "FrameBuffer.h"
4 
5 #include <GLES2/gl2.h>
6 
7 #include <stdint.h>
8 #include <stdio.h>
9 #include <stdlib.h>
10 
11 class Renderer {
12   public:
13     Renderer();
14     virtual ~Renderer();
15 
16     // Initialize OpenGL resources
17     // @return true if successful
18     virtual bool InitializeGLProgram() = 0;
19 
20     bool SetupGraphics(FrameBuffer* buffer);
21     bool SetupGraphics(int width, int height);
22 
23     bool Clear(float r, float g, float b, float a);
24 
25     int GetTextureName();
26     void SetInputTextureName(GLuint textureName);
27     void SetInputTextureDimensions(int width, int height);
28     void SetInputTextureType(GLenum textureType);
29 
30     void InitializeGLContext();
31 
32   protected:
33 
34     GLuint loadShader(GLenum shaderType, const char* pSource);
35     GLuint createProgram(const char*, const char* );
36 
SurfaceWidth()37     int SurfaceWidth() const { return mSurfaceWidth; }
SurfaceHeight()38     int SurfaceHeight() const { return mSurfaceHeight; }
39 
40     // Source code for shaders.
41     virtual const char* VertexShaderSource() const = 0;
42     virtual const char* FragmentShaderSource() const = 0;
43 
44     // Redefine this to use special texture types such as
45     // GL_TEXTURE_EXTERNAL_OES.
InputTextureType()46     GLenum InputTextureType() const { return mInputTextureType; }
47 
48     GLuint mGlProgram;
49     GLuint mInputTextureName;
50     GLenum mInputTextureType;
51     int mInputTextureWidth;
52     int mInputTextureHeight;
53 
54     // Attribute locations
55     GLint  mScalingtransLoc;
56     GLint maPositionHandle;
57     GLint maTextureHandle;
58 
59 
60     int mSurfaceWidth;      // Width of target surface.
61     int mSurfaceHeight;     // Height of target surface.
62 
63     FrameBuffer *mFrameBuffer;
64 };
65 
66