SurfaceTextureRenderer.h revision 41a2e9735136f372de95652d0828600282c8e967 
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//TODO: Add a base class Renderer for WarpRenderer and SurfaceTextureRenderer.
12class SurfaceTextureRenderer {
13  public:
14    SurfaceTextureRenderer();
15    virtual ~SurfaceTextureRenderer();
16
17    // Initialize OpenGL resources
18    // @return true if successful
19    bool InitializeGLProgram();
20
21    bool SetupGraphics(FrameBuffer* buffer);
22    bool SetupGraphics(int width, int height);
23
24    bool Clear(float r, float g, float b, float a);
25
26    void SetViewportMatrix(int w, int h, int W, int H);
27    void SetScalingMatrix(float xscale, float yscale);
28    bool DrawTexture(GLfloat *affine);
29
30    int GetTextureName();
31    void SetInputTextureName(GLuint textureName);
32    void SetInputTextureDimensions(int width, int height);
33    void SetInputTextureType(GLenum textureType);
34
35    void InitializeGLContext();
36
37    void SetSTMatrix(float *stmat);
38
39  protected:
40
41    GLuint loadShader(GLenum shaderType, const char* pSource);
42    GLuint createProgram(const char*, const char* );
43
44    int SurfaceWidth() const { return mSurfaceWidth; }
45    int SurfaceHeight() const { return mSurfaceHeight; }
46
47 private:
48    // Source code for shaders.
49    virtual const char* VertexShaderSource() const;
50    virtual const char* FragmentShaderSource() const;
51
52    // Redefine this to use special texture types such as
53    // GL_TEXTURE_EXTERNAL_OES.
54    virtual GLenum InputTextureType() const { return mInputTextureType; }
55
56    GLuint mGlProgram;
57    GLuint mInputTextureName;
58    GLenum mInputTextureType;
59    int mInputTextureWidth;
60    int mInputTextureHeight;
61
62    // Attribute locations
63    GLint  mScalingtransLoc;
64    GLint muSTMatrixHandle;
65    GLint maPositionHandle;
66    GLint maTextureHandle;
67
68    GLfloat mViewportMatrix[16];
69    GLfloat mScalingMatrix[16];
70    GLfloat mSTMatrix[16];
71
72    int mSurfaceWidth;      // Width of target surface.
73    int mSurfaceHeight;     // Height of target surface.
74
75    FrameBuffer *mFrameBuffer;
76};
77
78