/**
* Initialization method for any shader. Compiles and checks code.
*
* @param gl The global openGL instance.
* @throws CompilationFailedException If the compilation of the GLSL code generated any errors.
*/
public void init(GL3 gl) throws CompilationFailedException {
try {
// First, give the source to OpenGL and compile
gl.glShaderSource(getShaderPointer(), 1, source, (int[]) null, 0);
gl.glCompileShader(getShaderPointer());
// Receive compilation status
IntBuffer buf = Buffers.newDirectIntBuffer(1);
gl.glGetShaderiv(getShaderPointer(), GL3.GL_COMPILE_STATUS, buf);
int status = buf.get(0);
// Check the status
if (status == GL3.GL_FALSE) {
// Prepare for additional information
gl.glGetShaderiv(getShaderPointer(), GL3.GL_INFO_LOG_LENGTH, buf);
int logLength = buf.get(0);
byte[] reason = new byte[logLength];
// Get additional information
gl.glGetShaderInfoLog(getShaderPointer(), logLength, null, 0, reason, 0);
throw new CompilationFailedException(
"Compilation of " + filename + " failed, " + new String(reason));
}
} catch (UninitializedException e) {
logger.error(e.getMessage());
}
}
private static int createShader(final GL3 gl, int type, final String[] srcLines) {
int shaderID = gl.glCreateShader(type);
assert shaderID > 0;
int[] lengths = new int[srcLines.length];
for (int i = 0; i < srcLines.length; i++) {
lengths[i] = srcLines[i].length();
}
gl.glShaderSource(shaderID, srcLines.length, srcLines, lengths, 0);
gl.glCompileShader(shaderID);
return shaderID;
}
