/**
* Gets the location of a shader attribute.<br>
* Uses either the cached value {@link #getCachedAttribLocation(String)} if valid, or the GLSL
* queried via {@link GL2ES2#glGetAttribLocation(int, String)}.<br>
* The location will be cached.
*
* @return -1 if there is no such attribute available, otherwise >= 0
* @throws GLException if no program is attached
* @throws GLException if the program is not linked and no location was cached.
* @see #getCachedAttribLocation(String)
* @see #bindAttribLocation(GL2ES2, int, GLArrayData)
* @see #bindAttribLocation(GL2ES2, int, String)
* @see GL2ES2#glGetAttribLocation(int, String)
*/
public int getAttribLocation(GL2ES2 gl, String name) {
if (null == shaderProgram) throw new GLException("No program is attached");
int location = getCachedAttribLocation(name);
if (0 > location) {
if (!shaderProgram.linked()) throw new GLException("Program is not linked");
location = gl.glGetAttribLocation(shaderProgram.program(), name);
if (0 <= location) {
Integer idx = new Integer(location);
activeAttribLocationMap.put(name, idx);
if (DEBUG) {
System.err.println("ShaderState: glGetAttribLocation: " + name + ", loc: " + location);
}
} else if (verbose) {
System.err.println(
"ShaderState: glGetAttribLocation failed, no location for: "
+ name
+ ", loc: "
+ location);
if (DEBUG) {
Thread.dumpStack();
}
}
}
return location;
}
public LineProgramHandles(GL2ES2 gl) {
this.program =
createProgram(gl, lineVertShader_GLSL, lineGeomShader_GLSL, lineFragShader_GLSL);
this.AXIS_RECT = gl.glGetUniformLocation(program, "AXIS_RECT");
this.VIEWPORT_SIZE_PX = gl.glGetUniformLocation(program, "VIEWPORT_SIZE_PX");
this.LINE_THICKNESS_PX = gl.glGetUniformLocation(program, "LINE_THICKNESS_PX");
this.FEATHER_THICKNESS_PX = gl.glGetUniformLocation(program, "FEATHER_THICKNESS_PX");
this.JOIN_TYPE = gl.glGetUniformLocation(program, "JOIN_TYPE");
this.MITER_LIMIT = gl.glGetUniformLocation(program, "MITER_LIMIT");
this.STIPPLE_ENABLE = gl.glGetUniformLocation(program, "STIPPLE_ENABLE");
this.STIPPLE_SCALE = gl.glGetUniformLocation(program, "STIPPLE_SCALE");
this.STIPPLE_PATTERN = gl.glGetUniformLocation(program, "STIPPLE_PATTERN");
this.inXy = gl.glGetAttribLocation(program, "inXy");
this.inFlags = gl.glGetAttribLocation(program, "inFlags");
this.inMileage = gl.glGetAttribLocation(program, "inMileage");
this.inRgba = gl.glGetAttribLocation(program, "inRgba");
}
