protected void applyColor(DrawContext dc, java.awt.Color color, double opacity) {
if (dc.isPickingMode()) return;
double finalOpacity = opacity * (color.getAlpha() / 255.0);
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
OGLUtil.applyColor(gl, color, finalOpacity, true);
}
protected void beginRendering(DrawContext dc, OGLStackHandler stackHandler) {
if (dc == null) {
String message = Logging.getMessage("nullValue.DrawContextIsNull");
Logging.logger().fine(message);
throw new IllegalArgumentException(message);
}
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
int attribMask =
GL2.GL_COLOR_BUFFER_BIT // for alpha test func and ref, blend func
| GL2.GL_CURRENT_BIT // for current color
| GL2.GL_ENABLE_BIT // for enable/disable
| GL2.GL_LINE_BIT // for line width
| GL2.GL_TRANSFORM_BIT; // for matrix mode
stackHandler.pushAttrib(gl, attribMask);
stackHandler.pushTextureIdentity(gl);
stackHandler.pushProjectionIdentity(gl);
java.awt.Rectangle viewport = dc.getView().getViewport();
gl.glOrtho(
viewport.x, viewport.x + viewport.width, viewport.y, viewport.y + viewport.height, -1, 1);
stackHandler.pushModelviewIdentity(gl);
// Enable the alpha test.
gl.glEnable(GL2.GL_ALPHA_TEST);
gl.glAlphaFunc(GL2.GL_GREATER, 0.0f);
// Enable blending in premultiplied color mode.
gl.glEnable(GL.GL_BLEND);
OGLUtil.applyBlending(gl, true);
gl.glDisable(GL.GL_CULL_FACE);
gl.glDisable(GL.GL_DEPTH_TEST);
gl.glDisable(GL2.GL_LIGHTING);
gl.glDisable(GL.GL_TEXTURE_2D);
}