public static void initGl() {
// Initialize shaders and create/link program
int vertexShaderHandle = GLUtil.loadShader(GLES20.GL_VERTEX_SHADER, VERTEX_SHADER_CODE);
int fragShaderHandle = GLUtil.loadShader(GLES20.GL_FRAGMENT_SHADER, FRAGMENT_SHADER_CODE);
sProgramHandle = GLUtil.createAndLinkProgram(vertexShaderHandle, fragShaderHandle, null);
sAttribPositionHandle = GLES20.glGetAttribLocation(sProgramHandle, "aPosition");
sAttribTextureCoordsHandle = GLES20.glGetAttribLocation(sProgramHandle, "aTexCoords");
sUniformMVPMatrixHandle = GLES20.glGetUniformLocation(sProgramHandle, "uMVPMatrix");
sUniformTextureHandle = GLES20.glGetUniformLocation(sProgramHandle, "uTexture");
sUniformAlphaHandle = GLES20.glGetUniformLocation(sProgramHandle, "uAlpha");
// Compute max texture size
int[] maxTextureSize = new int[1];
GLES20.glGetIntegerv(GLES20.GL_MAX_TEXTURE_SIZE, maxTextureSize, 0);
sMaxTextureSize = maxTextureSize[0];
}
