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