C++ Rect::intersects方法代码示例

bool RenderQueue::rectIntersectsItem(const Common::Rect &rect) {
	for (RenderQueueArray::iterator iter = _currQueue->begin(); iter != _currQueue->end(); iter++) {
		const RenderQueueItem *item = &(*iter);
		if (rect.intersects(item->rect))
			return true;
	}
	return false;
}

void SurfaceList::render(Graphics::Surface *surface, const Common::Rect & clip) const {
	for(uint i = 0; i < surfaces_n; ++i) {
		const Surface &s = surfaces[i];
		Common::Rect r(s.x, s.y, s.x + s.w, s.y + s.h);
		if (r.bottom < clip.bottom || !clip.intersects(r))
			continue;

		r.clip(clip);
		r.translate(-s.x, -s.y);
		s.render(surface, r.left, r.top, false, r);
	}
}

void RenderQueue::invalidateItemsByRect(const Common::Rect &rect, const RenderQueueItem *item) {
	for (RenderQueueArray::iterator iter = _currQueue->begin(); iter != _currQueue->end(); iter++) {
		RenderQueueItem *subItem = &(*iter);
		if (item != subItem &&
			subItem->flags == kUnchanged &&
			rect.intersects(subItem->rect)) {
			
			subItem->flags = kRefresh;
			invalidateItemsByRect(subItem->rect, subItem);
		}
	}
}

void OSystem_IPHONE::drawMouseCursorOnRectUpdate(const Common::Rect& updatedRect, const Common::Rect& mouseRect) {
	//draw mouse on top
	if (_mouseVisible && (updatedRect.intersects(mouseRect))) {
		int srcX = 0;
		int srcY = 0;
		int left = _mouseX - _mouseHotspotX;
		if (left < 0) {
			srcX -= left;
			left = 0;
		}
		int top = _mouseY - _mouseHotspotY;
		if (top < 0) {
			srcY -= top;
			top = 0;
		}

		int bottom = top + _mouseHeight;
		if (bottom > _screenWidth)
			bottom = _screenWidth;

		int displayWidth = _mouseWidth;
		if (_mouseWidth + left > _screenWidth)
			displayWidth = _screenWidth - left;

		int displayHeight = _mouseHeight;
		if (_mouseHeight + top > _screenHeight)
			displayHeight = _screenHeight - top;

		byte *src = &_mouseBuf[srcY * _mouseWidth + srcX];
		uint16 *dst = &_fullscreen[top * _screenWidth + left];
		for (int y = displayHeight; y > srcY; y--) {
			for (int x = displayWidth; x > srcX; x--) {
				if (*src != _mouseKeyColour)
					*dst = _palette[*src];
				dst++;
				src++;
			}
			dst += _screenWidth - displayWidth + srcX;
			src += _mouseWidth - displayWidth + srcX;
		}
	}
}

void Slide::drawSlideElement(const Common::Rect &drawRect, const Common::Rect &oldBounds, DisplayElement *picture) {
	if (picture && drawRect.intersects(oldBounds)) {
		picture->moveElementTo(oldBounds.left, oldBounds.top);
		picture->draw(drawRect.findIntersectingRect(oldBounds));
	}
}

void RenderTicket::drawToSurface(Graphics::Surface *_targetSurface, Common::Rect *dstRect, Common::Rect *clipRect) const {
	TransparentSurface src(*getSurface(), false);
	bool doDelete = false;
	if (!clipRect) {
		doDelete = true;
		clipRect = new Common::Rect();
		clipRect->setWidth(getSurface()->w * _transform._numTimesX);
		clipRect->setHeight(getSurface()->h * _transform._numTimesY);
	}

	if (_owner) {
		if (_transform._alphaDisable) {
			src.setAlphaMode(TransparentSurface::ALPHA_OPAQUE);
		} else {
			src.setAlphaMode(_owner->getAlphaType());
		}
	}

	if (_transform._numTimesX * _transform._numTimesY == 1) {

		src.blit(*_targetSurface, dstRect->left, dstRect->top, _transform._flip, clipRect, _transform._rgbaMod, clipRect->width(), clipRect->height(), _transform._blendMode);

	} else {

		// clipRect is a subrect of the full numTimesX*numTimesY rect
		Common::Rect subRect;

		int y = 0;
		int w = getSurface()->w;
		int h = getSurface()->h;
		assert(w == _dstRect.width() / _transform._numTimesX);
		assert(h == _dstRect.height() / _transform._numTimesY);

		int basex = dstRect->left - clipRect->left;
		int basey = dstRect->top - clipRect->top;

		for (int ry = 0; ry < _transform._numTimesY; ++ry) {
			int x = 0;
			for (int rx = 0; rx < _transform._numTimesX; ++rx) {

				subRect.left = x;
				subRect.top = y;
				subRect.setWidth(w);
				subRect.setHeight(h);

				if (subRect.intersects(*clipRect)) {
					subRect.clip(*clipRect);
					subRect.translate(-x, -y);
					src.blit(*_targetSurface, basex + x + subRect.left, basey + y + subRect.top, _transform._flip, &subRect, _transform._rgbaMod, subRect.width(), subRect.height(), _transform._blendMode);

				}

				x += w;
			}
			y += h;
		}
	}

	if (doDelete) {
		delete clipRect;
	}
}

Common::Rect ScreenItem::getNowSeenRect(const Plane &plane) const {
	CelObj &celObj = getCelObj();

	Common::Rect celObjRect(celObj._width, celObj._height);
	Common::Rect nsRect;

	if (_useInsetRect) {
		if (_insetRect.intersects(celObjRect)) {
			nsRect = _insetRect;
			nsRect.clip(celObjRect);
		} else {
			nsRect = Common::Rect();
		}
	} else {
		nsRect = celObjRect;
	}

	const uint16 scriptWidth = g_sci->_gfxFrameout->getCurrentBuffer().scriptWidth;
	const uint16 scriptHeight = g_sci->_gfxFrameout->getCurrentBuffer().scriptHeight;

	Ratio scaleX, scaleY;
	if (_scale.signal & kScaleSignalDoScaling32) {
		if (_scale.signal & kScaleSignalUseVanishingPoint) {
			int num = _scale.max * (_position.y - plane._vanishingPoint.y) / (scriptWidth - plane._vanishingPoint.y);
			scaleX = Ratio(num, 128);
			scaleY = Ratio(num, 128);
		} else {
			scaleX = Ratio(_scale.x, 128);
			scaleY = Ratio(_scale.y, 128);
		}
	}

	if (scaleX.getNumerator() == 0 || scaleY.getNumerator() == 0) {
		return Common::Rect();
	}

	int16 displaceX = celObj._displace.x;
	int16 displaceY = celObj._displace.y;

	if (_mirrorX != celObj._mirrorX && _celInfo.type != kCelTypePic) {
		displaceX = celObj._width - displaceX - 1;
	}

	if (celObj._scaledWidth != kLowResX || celObj._scaledHeight != kLowResY) {
		// high resolution coordinates

		if (_useInsetRect) {
			Ratio scriptToCelX(celObj._scaledWidth, scriptWidth);
			Ratio scriptToCelY(celObj._scaledHeight, scriptHeight);
			mulru(nsRect, scriptToCelX, scriptToCelY, 0);

			if (nsRect.intersects(celObjRect)) {
				nsRect.clip(celObjRect);
			} else {
				nsRect = Common::Rect();
			}
		}

		if (!scaleX.isOne() || !scaleY.isOne()) {
			// Different games use a different cel scaling mode, but the
			// difference isn't consistent across SCI versions; instead,
			// it seems to be related to an update that happened during
			// SCI2.1mid where games started using hi-resolution game
			// scripts
			if (scriptWidth == kLowResX) {
				mulinc(nsRect, scaleX, scaleY);
				// TODO: This was in the original code, baked into the
				// multiplication though it is not immediately clear
				// why this is the only one that reduces the BR corner
				nsRect.right -= 1;
				nsRect.bottom -= 1;
			} else {
				nsRect.left = (nsRect.left * scaleX).toInt();
				nsRect.top = (nsRect.top * scaleY).toInt();

				if (scaleX.getNumerator() > scaleX.getDenominator()) {
					nsRect.right = (nsRect.right * scaleX).toInt();
				} else {
					nsRect.right = ((nsRect.right - 1) * scaleX).toInt() + 1;
				}

				if (scaleY.getNumerator() > scaleY.getDenominator()) {
					nsRect.bottom = (nsRect.bottom * scaleY).toInt();
				} else {
					nsRect.bottom = ((nsRect.bottom - 1) * scaleY).toInt() + 1;
				}
			}
		}

		Ratio celToScriptX(scriptWidth, celObj._scaledWidth);
		Ratio celToScriptY(scriptHeight, celObj._scaledHeight);

		displaceX = (displaceX * scaleX * celToScriptX).toInt();
		displaceY = (displaceY * scaleY * celToScriptY).toInt();

		mulinc(nsRect, celToScriptX, celToScriptY);
		nsRect.translate(_position.x - displaceX, _position.y - displaceY);
	} else {
		// low resolution coordinates

//.........这里部分代码省略.........