131   GLuint program = InitShaderProgram(kBasicTextureVertexShader,  in BasicTextureShaderProgram()  local
135   int textureSampler = glGetUniformLocation(program, "texture_sampler");  in BasicTextureShaderProgram()
139   int attribute_index = glGetAttribLocation(program, "c1");  in BasicTextureShaderProgram()
145   attribute_index = glGetAttribLocation(program, "c2");  in BasicTextureShaderProgram()
150   return program;  in BasicTextureShaderProgram()
180   GLuint program = InitShaderProgram(kDoubleTextureBlendVertexShader,  in DoubleTextureBlendShaderProgram()  local
183   int textureSampler0 = glGetUniformLocation(program, "texture_sampler_0");  in DoubleTextureBlendShaderProgram()
185   int textureSampler1 = glGetUniformLocation(program, "texture_sampler_1");  in DoubleTextureBlendShaderProgram()
189   int attribute_index = glGetAttribLocation(program, "c1");  in DoubleTextureBlendShaderProgram()
195   attribute_index = glGetAttribLocation(program, "c2");  in DoubleTextureBlendShaderProgram()
200   attribute_index = glGetAttribLocation(program, "c3");  in DoubleTextureBlendShaderProgram()
205   return program;  in DoubleTextureBlendShaderProgram()
242   GLuint program =  in TripleTextureBlendShaderProgram()  local
247   int textureSampler0 = glGetUniformLocation(program, "texture_sampler_0");  in TripleTextureBlendShaderProgram()
249   int textureSampler1 = glGetUniformLocation(program, "texture_sampler_1");  in TripleTextureBlendShaderProgram()
251   int textureSampler2 = glGetUniformLocation(program, "texture_sampler_2");  in TripleTextureBlendShaderProgram()
255   int attribute_index = glGetAttribLocation(program, "c1");  in TripleTextureBlendShaderProgram()
261   attribute_index = glGetAttribLocation(program, "c2");  in TripleTextureBlendShaderProgram()
266   attribute_index = glGetAttribLocation(program, "c3");  in TripleTextureBlendShaderProgram()
271   attribute_index = glGetAttribLocation(program, "c4");  in TripleTextureBlendShaderProgram()
276   return program;  in TripleTextureBlendShaderProgram()