michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "gfxRect.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: /* A rounded rectangle abstraction.
michael@0:  *
michael@0:  * This can represent a rectangle with a different pair of radii on each corner.
michael@0:  *
michael@0:  * Note: CoreGraphics and Direct2D only support rounded rectangle with the same
michael@0:  * radii on all corners. However, supporting CSS's border-radius requires the extra flexibility. */
michael@0: struct RoundedRect {
michael@0:     RoundedRect(gfxRect &aRect, gfxCornerSizes &aCorners) : rect(aRect), corners(aCorners) { }
michael@0:     void Deflate(gfxFloat aTopWidth, gfxFloat aBottomWidth, gfxFloat aLeftWidth, gfxFloat aRightWidth) {
michael@0:         // deflate the internal rect
michael@0:         rect.x += aLeftWidth;
michael@0:         rect.y += aTopWidth;
michael@0:         rect.width = std::max(0., rect.width - aLeftWidth - aRightWidth);
michael@0:         rect.height = std::max(0., rect.height - aTopWidth - aBottomWidth);
michael@0: 
michael@0:         corners.sizes[NS_CORNER_TOP_LEFT].width  = std::max(0., corners.sizes[NS_CORNER_TOP_LEFT].width - aLeftWidth);
michael@0:         corners.sizes[NS_CORNER_TOP_LEFT].height = std::max(0., corners.sizes[NS_CORNER_TOP_LEFT].height - aTopWidth);
michael@0: 
michael@0:         corners.sizes[NS_CORNER_TOP_RIGHT].width  = std::max(0., corners.sizes[NS_CORNER_TOP_RIGHT].width - aRightWidth);
michael@0:         corners.sizes[NS_CORNER_TOP_RIGHT].height = std::max(0., corners.sizes[NS_CORNER_TOP_RIGHT].height - aTopWidth);
michael@0: 
michael@0:         corners.sizes[NS_CORNER_BOTTOM_LEFT].width  = std::max(0., corners.sizes[NS_CORNER_BOTTOM_LEFT].width - aLeftWidth);
michael@0:         corners.sizes[NS_CORNER_BOTTOM_LEFT].height = std::max(0., corners.sizes[NS_CORNER_BOTTOM_LEFT].height - aBottomWidth);
michael@0: 
michael@0:         corners.sizes[NS_CORNER_BOTTOM_RIGHT].width  = std::max(0., corners.sizes[NS_CORNER_BOTTOM_RIGHT].width - aRightWidth);
michael@0:         corners.sizes[NS_CORNER_BOTTOM_RIGHT].height = std::max(0., corners.sizes[NS_CORNER_BOTTOM_RIGHT].height - aBottomWidth);
michael@0:     }
michael@0:     gfxRect rect;
michael@0:     gfxCornerSizes corners;
michael@0: };
michael@0: 
michael@0: } // namespace mozilla