Created
April 30, 2018 22:11
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Clipping for GUI
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| public boolean beginClipping(int x, int y, int w, int h) { | |
| IDevice dev = Age.Device; | |
| if (!dev.isEnabled(Feature.Scissor)) { | |
| dev.setFeatures(true, Feature.Scissor); | |
| } | |
| if (!clipRectStack.isEmpty()) { | |
| Rectangle parent = clipRectStack.lastElement(); | |
| int minX = Math.max(parent.x, x); | |
| int maxX = Math.min(parent.x + parent.width, x + w); | |
| if (maxX - minX < 1) return false; | |
| int minY = Math.max(parent.y, y); | |
| int maxY = Math.min(parent.y + parent.height, y + h); | |
| if (maxY - minY < 1) return false; | |
| x = minX; | |
| y = minY; | |
| w = maxX - minX; | |
| h = Math.max(1, maxY - minY); | |
| } | |
| clipRectStack.push(new Rectangle(x, y, w, h)); | |
| dev.setScissor(x, y, w, h); | |
| return true; | |
| } | |
| public void endClipping() { | |
| IDevice dev = Age.Device; | |
| if (!clipRectStack.isEmpty()) { | |
| clipRectStack.pop(); | |
| } | |
| if (!clipRectStack.isEmpty()) { | |
| Rectangle scissor = clipRectStack.peek(); | |
| dev.setScissor(scissor.x, scissor.y, scissor.width, scissor.height); | |
| } else { | |
| dev.setScissor(0, 0, width, height); | |
| if (dev.isEnabled(Feature.Scissor)) { | |
| dev.setFeatures(false, Feature.Scissor); | |
| } | |
| } | |
| } |
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