public static void setBoundElementVBO(final RendererRecord rendRecord, final int id) {
final GL gl = GLContext.getCurrentGL();
if (!rendRecord.isElementVboValid() || rendRecord.getCurrentElementVboId() != id) {
gl.glBindBuffer(GL.GL_ELEMENT_ARRAY_BUFFER, id);
rendRecord.setCurrentElementVboId(id);
rendRecord.setElementVboValid(true);
}
}
public static void applyScissors(final RendererRecord rendRecord) {
final GL gl = GLContext.getCurrentGL();
final Stack<ReadOnlyRectangle2> clips = rendRecord.getScissorClips();
if (clips.size() > 0) {
final Rectangle2 init = Rectangle2.fetchTempInstance();
init.set(-1, -1, -1, -1);
ReadOnlyRectangle2 r;
boolean first = true;
for (int i = clips.size(); --i >= 0; ) {
r = clips.get(i);
if (r == null) {
break;
}
if (first) {
init.set(r);
first = false;
} else {
init.intersect(r, init);
}
if (init.getWidth() <= 0 || init.getHeight() <= 0) {
init.setWidth(0);
init.setHeight(0);
break;
}
}
if (init.getWidth() == -1) {
setClippingEnabled(rendRecord, false);
} else {
setClippingEnabled(rendRecord, true);
gl.glScissor(init.getX(), init.getY(), init.getWidth(), init.getHeight());
}
Rectangle2.releaseTempInstance(init);
} else {
// no clips, so disable
setClippingEnabled(rendRecord, false);
}
}
GL2 gl() {
if (gl == null) {
gl = GLContext.getCurrentGL().getGL2();
}
return gl;
}
public static void setClippingEnabled(final RendererRecord rendRecord, final boolean enabled) {
final GL gl = GLContext.getCurrentGL();
if (enabled && (!rendRecord.isClippingTestValid() || !rendRecord.isClippingTestEnabled())) {
gl.glEnable(GL.GL_SCISSOR_TEST);
rendRecord.setClippingTestEnabled(true);
} else if (!enabled
&& (!rendRecord.isClippingTestValid() || rendRecord.isClippingTestEnabled())) {
gl.glDisable(GL.GL_SCISSOR_TEST);
rendRecord.setClippingTestEnabled(false);
}
rendRecord.setClippingTestValid(true);
}