com.zhou.android.opengl

package com.zhou.android.opengl; import android.opengl.GLES20; import android.util.Log; import java.nio.Buffer; import java.nio.ByteBuffer; import java.nio.ByteOrder; /** * step to use:<br/> * 1. new GLProgram()<br/> * 2. buildProgram()<br/> * 3. buildTextures()<br/> * 4. drawFrame()<br/> */ public class GLProgram { private String TAG = "open_gl"; // program id private int _program; // window position public final int mWinPosition; // texture id private int _textureI; private int _textureII; private int _textureIII; // texture index in gles private int _tIindex; private int _tIIindex; private int _tIIIindex; // vertices on screen private float[] _vertices; // handles private int _positionHandle = -1, _coordHandle = -1; private int _yhandle = -1, _uhandle = -1, _vhandle = -1; private int _ytid = -1, _utid = -1, _vtid = -1; // vertices buffer private ByteBuffer _vertice_buffer; private ByteBuffer _coord_buffer; // video width and height private int _video_width = -1; private int _video_height = -1; // flow control private boolean isProgBuilt = false; /** * position can only be 0~4:<br/> * fullscreen => 0<br/> * left-top => 1<br/> * right-top => 2<br/> * left-bottom => 3<br/> * right-bottom => 4 */ public GLProgram(int position) { if (position < 0 || position > 4) { throw new RuntimeException("Index can only be 0 to 4"); } mWinPosition = position; setup(mWinPosition); } /** * prepared for later use */ public void setup(int position) { switch (mWinPosition) { case 1: _vertices = squareVertices1; _textureI = GLES20.GL_TEXTURE0; _textureII = GLES20.GL_TEXTURE1; _textureIII = GLES20.GL_TEXTURE2; _tIindex = 0; _tIIindex = 1; _tIIIindex = 2; break; case 2: _vertices = squareVertices2; _textureI = GLES20.GL_TEXTURE3; _textureII = GLES20.GL_TEXTURE4; _textureIII = GLES20.GL_TEXTURE5; _tIindex = 3; _tIIindex = 4; _tIIIindex = 5; break; case 3: _vertices = squareVertices3; _textureI = GLES20.GL_TEXTURE6; _textureII = GLES20.GL_TEXTURE7; _textureIII = GLES20.GL_TEXTURE8; _tIindex = 6; _tIIindex = 7; _tIIIindex = 8; break; case 4: _vertices = squareVertices4; _textureI = GLES20.GL_TEXTURE9; _textureII = GLES20.GL_TEXTURE10; _textureIII = GLES20.GL_TEXTURE11; _tIindex = 9; _tIIindex = 10; _tIIIindex = 11; break; case 0: default: _vertices = squareVertices; _textureI = GLES20.GL_TEXTURE0; _textureII = GLES20.GL_TEXTURE1; _textureIII = GLES20.GL_TEXTURE2; _tIindex = 0; _tIIindex = 1; _tIIIindex = 2; break; } } public boolean isProgramBuilt() { return isProgBuilt; } public void buildProgram() { // TODO createBuffers(_vertices, coordVertices); if (_program <= 0) { _program = createProgram(VERTEX_SHADER, FRAGMENT_SHADER); } Log.d(TAG, "_program = " + _program); /* * get handle for "vPosition" and "a_texCoord" */ _positionHandle = GLES20.glGetAttribLocation(_program, "vPosition"); Log.d(TAG, "_positionHandle = " + _positionHandle); checkGlError("glGetAttribLocation vPosition"); if (_positionHandle == -1) { throw new RuntimeException("Could not get attribute location for vPosition"); } _coordHandle = GLES20.glGetAttribLocation(_program, "a_texCoord"); Log.d(TAG, "_coordHandle = " + _coordHandle); checkGlError("glGetAttribLocation a_texCoord"); if (_coordHandle == -1) { throw new RuntimeException("Could not get attribute location for a_texCoord"); } /* * get uniform location for y/u/v, we pass data through these uniforms */ _yhandle = GLES20.glGetUniformLocation(_program, "tex_y"); Log.d(TAG, "_yhandle = " + _yhandle); checkGlError("glGetUniformLocation tex_y"); if (_yhandle == -1) { throw new RuntimeException("Could not get uniform location for tex_y"); } _uhandle = GLES20.glGetUniformLocation(_program, "tex_u"); Log.d(TAG, "_uhandle = " + _uhandle); checkGlError("glGetUniformLocation tex_u"); if (_uhandle == -1) { throw new RuntimeException("Could not get uniform location for tex_u"); } _vhandle = GLES20.glGetUniformLocation(_program, "tex_v"); Log.d(TAG, "_vhandle = " + _vhandle); checkGlError("glGetUniformLocation tex_v"); if (_vhandle == -1) { throw new RuntimeException("Could not get uniform location for tex_v"); } isProgBuilt = true; } /** * build a set of textures, one for R, one for G, and one for B. */ public void buildTextures(Buffer y, Buffer u, Buffer v, int width, int height) { boolean videoSizeChanged = (width != _video_width || height != _video_height); if (videoSizeChanged) { _video_width = width; _video_height = height; Log.d(TAG, "buildTextures videoSizeChanged: w=" + _video_width + " h=" + _video_height); } // building texture for Y data if (_ytid < 0 || videoSizeChanged) { if (_ytid >= 0) { Log.d(TAG, "glDeleteTextures Y"); GLES20.glDeleteTextures(1, new int[]{_ytid}, 0); checkGlError("glDeleteTextures"); } // GLES20.glPixelStorei(GLES20.GL_UNPACK_ALIGNMENT, 1); int[] textures = new int[1]; GLES20.glGenTextures(1, textures, 0); checkGlError("glGenTextures"); _ytid = textures[0]; Log.d(TAG, "glGenTextures Y = " + _ytid); } GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, _ytid); checkGlError("glBindTexture"); GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_LUMINANCE, _video_width, _video_height, 0, GLES20.GL_LUMINANCE, GLES20.GL_UNSIGNED_BYTE, y); checkGlError("glTexImage2D"); GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST); GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR); GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE); GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE); // building texture for U data if (_utid < 0 || videoSizeChanged) { if (_utid >= 0) { Log.d(TAG, "glDeleteTextures U"); GLES20.glDeleteTextures(1, new int[]{_utid}, 0); checkGlError("glDeleteTextures"); } int[] textures = new int[1]; GLES20.glGenTextures(1, textures, 0); checkGlError("glGenTextures"); _utid = textures[0]; Log.d(TAG, "glGenTextures U = " + _utid); } GLES20.glBindT