/**
* If supported, queries the natively supported shader binary formats using {@link
* GL2ES2#GL_NUM_SHADER_BINARY_FORMATS} and {@link GL2ES2#GL_SHADER_BINARY_FORMATS} via {@link
* GL2ES2#glGetIntegerv(int, int[], int)}.
*/
public static Set<Integer> getShaderBinaryFormats(final GL _gl) {
final GL2ES2 gl = _gl.getGL2ES2();
final ProfileInformation info = getProfileInformation(gl);
if (null == info.shaderBinaryFormats) {
info.shaderBinaryFormats = new HashSet<Integer>();
if (gl.isGLES2Compatible()) {
try {
final int[] param = new int[1];
gl.glGetIntegerv(GL2ES2.GL_NUM_SHADER_BINARY_FORMATS, param, 0);
final int err = gl.glGetError();
final int numFormats = GL.GL_NO_ERROR == err ? param[0] : 0;
if (numFormats > 0) {
final int[] formats = new int[numFormats];
gl.glGetIntegerv(GL2ES2.GL_SHADER_BINARY_FORMATS, formats, 0);
for (int i = 0; i < numFormats; i++) {
info.shaderBinaryFormats.add(Integer.valueOf(formats[i]));
}
}
} catch (final GLException gle) {
System.err.println("Caught exception on thread " + Thread.currentThread().getName());
gle.printStackTrace();
}
}
}
return info.shaderBinaryFormats;
}
private int checkSelection(GL2ES2 gl, int x, int y, int width, int height) {
gl.glPixelStorei(GL2ES2.GL_PACK_ALIGNMENT, 4);
gl.glPixelStorei(GL2ES2.GL_UNPACK_ALIGNMENT, 4);
gl.glClearColor(sceneClearColor[0], sceneClearColor[1], sceneClearColor[2], sceneClearColor[3]);
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
render(gl, width, height, 0, null, true);
ByteBuffer pixel = Buffers.newDirectByteBuffer(4);
pixel.order(ByteOrder.nativeOrder());
IntBuffer viewport = IntBuffer.allocate(4);
gl.glGetIntegerv(GL2ES2.GL_VIEWPORT, viewport);
gl.glReadPixels(x, viewport.get(3) - y, 1, 1, GL2ES2.GL_RGBA, GL2ES2.GL_UNSIGNED_BYTE, pixel);
int qp = pixel.get(0) & 0xFF;
int index = Math.round(((qp / 255.0f) * (count + 2)) - 1);
if (index < 0 || index >= count) return -1;
return index;
}
