public void onSurfaceChanged(int width, int height) {
// log.debug("onSurfaceChanged: new={}, {}x{}", mNewSurface, width, height);
if (width <= 0 || height <= 0) return;
gl.viewport(0, 0, width, height);
// GL.scissor(0, 0, width, height);
// GL.enable(GL20.SCISSOR_TEST);
gl.clearStencil(0x00);
gl.disable(GL.CULL_FACE);
gl.blendFunc(GL.ONE, GL.ONE_MINUS_SRC_ALPHA);
gl.frontFace(GL.CW);
gl.cullFace(GL.BACK);
if (!mNewSurface) {
mMap.updateMap(false);
return;
}
mNewSurface = false;
/** initialize quad indices used by Texture- and LineTexRenderer */
int[] vboIds = GLUtils.glGenBuffers(2);
mQuadIndicesID = vboIds[0];
short[] indices = new short[MAX_INDICES];
for (int i = 0, j = 0; i < MAX_INDICES; i += 6, j += 4) {
indices[i + 0] = (short) (j + 0);
indices[i + 1] = (short) (j + 1);
indices[i + 2] = (short) (j + 2);
indices[i + 3] = (short) (j + 2);
indices[i + 4] = (short) (j + 1);
indices[i + 5] = (short) (j + 3);
}
ShortBuffer buf = MapRenderer.getShortBuffer(indices.length);
buf.put(indices);
buf.flip();
GLState.bindElementBuffer(mQuadIndicesID);
gl.bufferData(GL.ELEMENT_ARRAY_BUFFER, indices.length * 2, buf, GL.STATIC_DRAW);
GLState.bindElementBuffer(0);
/** initialize default quad */
FloatBuffer floatBuffer = MapRenderer.getFloatBuffer(8);
float[] quad = new float[] {-1, -1, -1, 1, 1, -1, 1, 1};
floatBuffer.put(quad);
floatBuffer.flip();
mQuadVerticesID = vboIds[1];
GLState.bindVertexBuffer(mQuadVerticesID);
gl.bufferData(GL.ARRAY_BUFFER, quad.length * 4, floatBuffer, GL.STATIC_DRAW);
GLState.bindVertexBuffer(0);
GLState.init();
mMap.updateMap(true);
}
