gecko-dev/gfx/thebes/RoundedRect.h

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