Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
       2             :  * This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #ifndef ROUNDED_RECT_H
       7             : #define ROUNDED_RECT_H
       8             : 
       9             : #include "gfxRect.h"
      10             : #include "gfxTypes.h"
      11             : #include "mozilla/gfx/PathHelpers.h"
      12             : 
      13             : namespace mozilla {
      14             : /* A rounded rectangle abstraction.
      15             :  *
      16             :  * This can represent a rectangle with a different pair of radii on each corner.
      17             :  *
      18             :  * Note: CoreGraphics and Direct2D only support rounded rectangle with the same
      19             :  * radii on all corners. However, supporting CSS's border-radius requires the extra flexibility. */
      20             : struct RoundedRect {
      21             :     typedef mozilla::gfx::RectCornerRadii RectCornerRadii;
      22             : 
      23          17 :     RoundedRect(gfxRect &aRect, RectCornerRadii &aCorners) : rect(aRect), corners(aCorners) { }
      24          17 :     void Deflate(gfxFloat aTopWidth, gfxFloat aBottomWidth, gfxFloat aLeftWidth, gfxFloat aRightWidth) {
      25             :         // deflate the internal rect
      26          17 :         rect.x += aLeftWidth;
      27          17 :         rect.y += aTopWidth;
      28          17 :         rect.width = std::max(0., rect.width - aLeftWidth - aRightWidth);
      29          17 :         rect.height = std::max(0., rect.height - aTopWidth - aBottomWidth);
      30             : 
      31          17 :         corners.radii[mozilla::eCornerTopLeft].width =
      32          34 :             std::max(0., corners.radii[mozilla::eCornerTopLeft].width - aLeftWidth);
      33          17 :         corners.radii[mozilla::eCornerTopLeft].height =
      34          34 :             std::max(0., corners.radii[mozilla::eCornerTopLeft].height - aTopWidth);
      35             : 
      36          17 :         corners.radii[mozilla::eCornerTopRight].width =
      37          34 :             std::max(0., corners.radii[mozilla::eCornerTopRight].width - aRightWidth);
      38          17 :         corners.radii[mozilla::eCornerTopRight].height =
      39          34 :             std::max(0., corners.radii[mozilla::eCornerTopRight].height - aTopWidth);
      40             : 
      41          17 :         corners.radii[mozilla::eCornerBottomLeft].width =
      42          34 :             std::max(0., corners.radii[mozilla::eCornerBottomLeft].width - aLeftWidth);
      43          17 :         corners.radii[mozilla::eCornerBottomLeft].height =
      44          34 :             std::max(0., corners.radii[mozilla::eCornerBottomLeft].height - aBottomWidth);
      45             : 
      46          17 :         corners.radii[mozilla::eCornerBottomRight].width =
      47          34 :             std::max(0., corners.radii[mozilla::eCornerBottomRight].width - aRightWidth);
      48          17 :         corners.radii[mozilla::eCornerBottomRight].height =
      49          34 :             std::max(0., corners.radii[mozilla::eCornerBottomRight].height - aBottomWidth);
      50          17 :     }
      51             :     gfxRect rect;
      52             :     RectCornerRadii corners;
      53             : };
      54             : 
      55             : } // namespace mozilla
      56             : 
      57             : #endif