// Creates program object, attaches shaders, and links into pipeline
protected int createProgram(String vertexSource, String fragmentSource) {
// Load the vertex and fragment shaders
int vertexShader = loadShader(GL_VERTEX_SHADER, vertexSource);
int fragmentShader = loadShader(GL_FRAGMENT_SHADER, fragmentSource);
// Create the program object
int program = glCreateProgram();
if (vertexShader == 0 || fragmentShader == 0 || program == 0) return 0;
if (program != 0) {
glAttachShader(program, vertexShader);
ctx.checkGLError("createProgram Attaching vertex shader");
glAttachShader(program, fragmentShader);
ctx.checkGLError("createProgram Attaching fragment shader");
glLinkProgram(program);
int linkStatus = glGetProgram(program, GL_LINK_STATUS);
if (linkStatus != GL_TRUE) {
log().error("Could not link program: ");
log().error(glGetProgramInfoLog(program, SHADER_INFO_LOG_LEN));
glDeleteProgram(program);
program = 0;
}
}
return program;
}
