forked from mirrors/gecko-dev
935 lines
38 KiB
C++
935 lines
38 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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#ifndef MOZ_UNITS_H_
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#define MOZ_UNITS_H_
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#include <type_traits>
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#include "mozilla/gfx/Coord.h"
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#include "mozilla/gfx/Point.h"
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#include "mozilla/gfx/Rect.h"
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#include "mozilla/gfx/RectAbsolute.h"
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#include "mozilla/gfx/ScaleFactor.h"
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#include "mozilla/gfx/ScaleFactors2D.h"
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#include "nsMargin.h"
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#include "nsRect.h"
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#include "nsRegion.h"
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#include "mozilla/AppUnits.h"
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namespace mozilla {
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template <typename T>
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struct IsPixel : std::false_type {};
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// See struct declaration for a description of each unit type.
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struct CSSPixel;
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struct LayoutDevicePixel;
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struct LayerPixel;
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struct CSSTransformedLayerPixel;
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struct RenderTargetPixel;
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struct ScreenPixel;
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struct ParentLayerPixel;
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struct DesktopPixel;
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struct ImagePixel;
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struct ExternalPixel;
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template <>
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struct IsPixel<CSSPixel> : std::true_type {};
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template <>
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struct IsPixel<LayoutDevicePixel> : std::true_type {};
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template <>
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struct IsPixel<LayerPixel> : std::true_type {};
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template <>
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struct IsPixel<CSSTransformedLayerPixel> : std::true_type {};
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template <>
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struct IsPixel<RenderTargetPixel> : std::true_type {};
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template <>
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struct IsPixel<ImagePixel> : std::true_type {};
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template <>
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struct IsPixel<ScreenPixel> : std::true_type {};
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template <>
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struct IsPixel<ParentLayerPixel> : std::true_type {};
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template <>
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struct IsPixel<DesktopPixel> : std::true_type {};
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template <>
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struct IsPixel<ExternalPixel> : std::true_type {};
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typedef gfx::CoordTyped<CSSPixel> CSSCoord;
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typedef gfx::IntCoordTyped<CSSPixel> CSSIntCoord;
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typedef gfx::PointTyped<CSSPixel> CSSPoint;
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typedef gfx::IntPointTyped<CSSPixel> CSSIntPoint;
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typedef gfx::SizeTyped<CSSPixel> CSSSize;
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typedef gfx::IntSizeTyped<CSSPixel> CSSIntSize;
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typedef gfx::RectTyped<CSSPixel> CSSRect;
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typedef gfx::IntRectTyped<CSSPixel> CSSIntRect;
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typedef gfx::MarginTyped<CSSPixel> CSSMargin;
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typedef gfx::IntMarginTyped<CSSPixel> CSSIntMargin;
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typedef gfx::IntRegionTyped<CSSPixel> CSSIntRegion;
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typedef gfx::CoordTyped<LayoutDevicePixel> LayoutDeviceCoord;
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typedef gfx::IntCoordTyped<LayoutDevicePixel> LayoutDeviceIntCoord;
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typedef gfx::PointTyped<LayoutDevicePixel> LayoutDevicePoint;
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typedef gfx::IntPointTyped<LayoutDevicePixel> LayoutDeviceIntPoint;
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typedef gfx::SizeTyped<LayoutDevicePixel> LayoutDeviceSize;
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typedef gfx::IntSizeTyped<LayoutDevicePixel> LayoutDeviceIntSize;
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typedef gfx::RectTyped<LayoutDevicePixel> LayoutDeviceRect;
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typedef gfx::IntRectTyped<LayoutDevicePixel> LayoutDeviceIntRect;
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typedef gfx::MarginTyped<LayoutDevicePixel> LayoutDeviceMargin;
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typedef gfx::IntMarginTyped<LayoutDevicePixel> LayoutDeviceIntMargin;
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typedef gfx::IntRegionTyped<LayoutDevicePixel> LayoutDeviceIntRegion;
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typedef gfx::CoordTyped<LayerPixel> LayerCoord;
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typedef gfx::IntCoordTyped<LayerPixel> LayerIntCoord;
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typedef gfx::PointTyped<LayerPixel> LayerPoint;
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typedef gfx::IntPointTyped<LayerPixel> LayerIntPoint;
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typedef gfx::SizeTyped<LayerPixel> LayerSize;
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typedef gfx::IntSizeTyped<LayerPixel> LayerIntSize;
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typedef gfx::RectTyped<LayerPixel> LayerRect;
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typedef gfx::RectAbsoluteTyped<LayerPixel> LayerRectAbsolute;
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typedef gfx::IntRectTyped<LayerPixel> LayerIntRect;
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typedef gfx::MarginTyped<LayerPixel> LayerMargin;
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typedef gfx::IntMarginTyped<LayerPixel> LayerIntMargin;
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typedef gfx::IntRegionTyped<LayerPixel> LayerIntRegion;
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typedef gfx::CoordTyped<CSSTransformedLayerPixel> CSSTransformedLayerCoord;
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typedef gfx::IntCoordTyped<CSSTransformedLayerPixel>
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CSSTransformedLayerIntCoord;
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typedef gfx::PointTyped<CSSTransformedLayerPixel> CSSTransformedLayerPoint;
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typedef gfx::IntPointTyped<CSSTransformedLayerPixel>
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CSSTransformedLayerIntPoint;
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typedef gfx::SizeTyped<CSSTransformedLayerPixel> CSSTransformedLayerSize;
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typedef gfx::IntSizeTyped<CSSTransformedLayerPixel> CSSTransformedLayerIntSize;
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typedef gfx::RectTyped<CSSTransformedLayerPixel> CSSTransformedLayerRect;
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typedef gfx::IntRectTyped<CSSTransformedLayerPixel> CSSTransformedLayerIntRect;
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typedef gfx::MarginTyped<CSSTransformedLayerPixel> CSSTransformedLayerMargin;
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typedef gfx::IntMarginTyped<CSSTransformedLayerPixel>
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CSSTransformedLayerIntMargin;
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typedef gfx::IntRegionTyped<CSSTransformedLayerPixel>
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CSSTransformedLayerIntRegion;
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typedef gfx::PointTyped<RenderTargetPixel> RenderTargetPoint;
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typedef gfx::IntPointTyped<RenderTargetPixel> RenderTargetIntPoint;
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typedef gfx::SizeTyped<RenderTargetPixel> RenderTargetSize;
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typedef gfx::IntSizeTyped<RenderTargetPixel> RenderTargetIntSize;
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typedef gfx::RectTyped<RenderTargetPixel> RenderTargetRect;
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typedef gfx::IntRectTyped<RenderTargetPixel> RenderTargetIntRect;
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typedef gfx::MarginTyped<RenderTargetPixel> RenderTargetMargin;
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typedef gfx::IntMarginTyped<RenderTargetPixel> RenderTargetIntMargin;
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typedef gfx::IntRegionTyped<RenderTargetPixel> RenderTargetIntRegion;
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typedef gfx::PointTyped<ImagePixel> ImagePoint;
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typedef gfx::IntPointTyped<ImagePixel> ImageIntPoint;
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typedef gfx::SizeTyped<ImagePixel> ImageSize;
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typedef gfx::IntSizeTyped<ImagePixel> ImageIntSize;
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typedef gfx::RectTyped<ImagePixel> ImageRect;
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typedef gfx::IntRectTyped<ImagePixel> ImageIntRect;
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typedef gfx::CoordTyped<ScreenPixel> ScreenCoord;
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typedef gfx::IntCoordTyped<ScreenPixel> ScreenIntCoord;
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typedef gfx::PointTyped<ScreenPixel> ScreenPoint;
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typedef gfx::IntPointTyped<ScreenPixel> ScreenIntPoint;
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typedef gfx::SizeTyped<ScreenPixel> ScreenSize;
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typedef gfx::IntSizeTyped<ScreenPixel> ScreenIntSize;
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typedef gfx::RectTyped<ScreenPixel> ScreenRect;
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typedef gfx::IntRectTyped<ScreenPixel> ScreenIntRect;
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typedef gfx::MarginTyped<ScreenPixel> ScreenMargin;
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typedef gfx::IntMarginTyped<ScreenPixel> ScreenIntMargin;
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typedef gfx::IntRegionTyped<ScreenPixel> ScreenIntRegion;
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typedef gfx::CoordTyped<ParentLayerPixel> ParentLayerCoord;
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typedef gfx::IntCoordTyped<ParentLayerPixel> ParentLayerIntCoord;
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typedef gfx::PointTyped<ParentLayerPixel> ParentLayerPoint;
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typedef gfx::IntPointTyped<ParentLayerPixel> ParentLayerIntPoint;
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typedef gfx::SizeTyped<ParentLayerPixel> ParentLayerSize;
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typedef gfx::IntSizeTyped<ParentLayerPixel> ParentLayerIntSize;
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typedef gfx::RectTyped<ParentLayerPixel> ParentLayerRect;
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typedef gfx::IntRectTyped<ParentLayerPixel> ParentLayerIntRect;
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typedef gfx::MarginTyped<ParentLayerPixel> ParentLayerMargin;
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typedef gfx::IntMarginTyped<ParentLayerPixel> ParentLayerIntMargin;
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typedef gfx::IntRegionTyped<ParentLayerPixel> ParentLayerIntRegion;
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typedef gfx::CoordTyped<DesktopPixel> DesktopCoord;
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typedef gfx::IntCoordTyped<DesktopPixel> DesktopIntCoord;
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typedef gfx::PointTyped<DesktopPixel> DesktopPoint;
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typedef gfx::IntPointTyped<DesktopPixel> DesktopIntPoint;
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typedef gfx::SizeTyped<DesktopPixel> DesktopSize;
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typedef gfx::IntSizeTyped<DesktopPixel> DesktopIntSize;
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typedef gfx::RectTyped<DesktopPixel> DesktopRect;
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typedef gfx::IntRectTyped<DesktopPixel> DesktopIntRect;
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typedef gfx::CoordTyped<ExternalPixel> ExternalCoord;
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typedef gfx::IntCoordTyped<ExternalPixel> ExternalIntCoord;
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typedef gfx::PointTyped<ExternalPixel> ExternalPoint;
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typedef gfx::IntPointTyped<ExternalPixel> ExternalIntPoint;
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typedef gfx::SizeTyped<ExternalPixel> ExternalSize;
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typedef gfx::IntSizeTyped<ExternalPixel> ExternalIntSize;
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typedef gfx::RectTyped<ExternalPixel> ExternalRect;
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typedef gfx::IntRectTyped<ExternalPixel> ExternalIntRect;
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typedef gfx::MarginTyped<ExternalPixel> ExternalMargin;
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typedef gfx::IntMarginTyped<ExternalPixel> ExternalIntMargin;
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typedef gfx::IntRegionTyped<ExternalPixel> ExternalIntRegion;
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typedef gfx::ScaleFactor<CSSPixel, CSSPixel> CSSToCSSScale;
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typedef gfx::ScaleFactor<CSSPixel, LayoutDevicePixel> CSSToLayoutDeviceScale;
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typedef gfx::ScaleFactor<CSSPixel, LayerPixel> CSSToLayerScale;
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typedef gfx::ScaleFactor<CSSPixel, ScreenPixel> CSSToScreenScale;
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typedef gfx::ScaleFactor<CSSPixel, ParentLayerPixel> CSSToParentLayerScale;
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typedef gfx::ScaleFactor<CSSPixel, DesktopPixel> CSSToDesktopScale;
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typedef gfx::ScaleFactor<LayoutDevicePixel, CSSPixel> LayoutDeviceToCSSScale;
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typedef gfx::ScaleFactor<LayoutDevicePixel, LayerPixel>
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LayoutDeviceToLayerScale;
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typedef gfx::ScaleFactor<LayoutDevicePixel, ScreenPixel>
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LayoutDeviceToScreenScale;
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typedef gfx::ScaleFactor<LayoutDevicePixel, ParentLayerPixel>
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LayoutDeviceToParentLayerScale;
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typedef gfx::ScaleFactor<LayerPixel, CSSPixel> LayerToCSSScale;
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typedef gfx::ScaleFactor<LayerPixel, LayoutDevicePixel>
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LayerToLayoutDeviceScale;
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typedef gfx::ScaleFactor<LayerPixel, RenderTargetPixel>
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LayerToRenderTargetScale;
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typedef gfx::ScaleFactor<LayerPixel, ScreenPixel> LayerToScreenScale;
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typedef gfx::ScaleFactor<LayerPixel, ParentLayerPixel> LayerToParentLayerScale;
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typedef gfx::ScaleFactor<RenderTargetPixel, ScreenPixel>
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RenderTargetToScreenScale;
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typedef gfx::ScaleFactor<ScreenPixel, CSSPixel> ScreenToCSSScale;
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typedef gfx::ScaleFactor<ScreenPixel, LayoutDevicePixel>
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ScreenToLayoutDeviceScale;
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typedef gfx::ScaleFactor<ScreenPixel, LayerPixel> ScreenToLayerScale;
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typedef gfx::ScaleFactor<ScreenPixel, ParentLayerPixel>
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ScreenToParentLayerScale;
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typedef gfx::ScaleFactor<ParentLayerPixel, LayerPixel> ParentLayerToLayerScale;
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typedef gfx::ScaleFactor<ParentLayerPixel, ScreenPixel>
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ParentLayerToScreenScale;
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typedef gfx::ScaleFactor<ParentLayerPixel, ParentLayerPixel>
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ParentLayerToParentLayerScale;
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typedef gfx::ScaleFactor<DesktopPixel, LayoutDevicePixel>
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DesktopToLayoutDeviceScale;
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typedef gfx::ScaleFactor<LayoutDevicePixel, DesktopPixel>
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LayoutDeviceToDesktopScale;
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typedef gfx::ScaleFactors2D<CSSPixel, LayoutDevicePixel>
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CSSToLayoutDeviceScale2D;
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typedef gfx::ScaleFactors2D<CSSPixel, LayerPixel> CSSToLayerScale2D;
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typedef gfx::ScaleFactors2D<CSSPixel, ScreenPixel> CSSToScreenScale2D;
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typedef gfx::ScaleFactors2D<CSSPixel, ParentLayerPixel> CSSToParentLayerScale2D;
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typedef gfx::ScaleFactors2D<LayoutDevicePixel, CSSPixel>
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LayoutDeviceToCSSScale2D;
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typedef gfx::ScaleFactors2D<LayoutDevicePixel, LayerPixel>
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LayoutDeviceToLayerScale2D;
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typedef gfx::ScaleFactors2D<LayoutDevicePixel, ScreenPixel>
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LayoutDeviceToScreenScale2D;
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typedef gfx::ScaleFactors2D<LayoutDevicePixel, ParentLayerPixel>
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LayoutDeviceToParentLayerScale2D;
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typedef gfx::ScaleFactors2D<LayerPixel, CSSPixel> LayerToCSSScale2D;
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typedef gfx::ScaleFactors2D<LayerPixel, LayoutDevicePixel>
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LayerToLayoutDeviceScale2D;
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typedef gfx::ScaleFactors2D<LayerPixel, RenderTargetPixel>
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LayerToRenderTargetScale2D;
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typedef gfx::ScaleFactors2D<LayerPixel, ScreenPixel> LayerToScreenScale2D;
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typedef gfx::ScaleFactors2D<LayerPixel, ParentLayerPixel>
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LayerToParentLayerScale2D;
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typedef gfx::ScaleFactors2D<RenderTargetPixel, ScreenPixel>
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RenderTargetToScreenScale2D;
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typedef gfx::ScaleFactors2D<ScreenPixel, CSSPixel> ScreenToCSSScale2D;
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typedef gfx::ScaleFactors2D<ScreenPixel, LayoutDevicePixel>
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ScreenToLayoutDeviceScale2D;
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typedef gfx::ScaleFactors2D<ScreenPixel, ScreenPixel> ScreenToScreenScale2D;
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typedef gfx::ScaleFactors2D<ScreenPixel, LayerPixel> ScreenToLayerScale2D;
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typedef gfx::ScaleFactors2D<ScreenPixel, ParentLayerPixel>
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ScreenToParentLayerScale2D;
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typedef gfx::ScaleFactors2D<ParentLayerPixel, LayerPixel>
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ParentLayerToLayerScale2D;
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typedef gfx::ScaleFactors2D<ParentLayerPixel, ScreenPixel>
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ParentLayerToScreenScale2D;
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typedef gfx::ScaleFactors2D<ParentLayerPixel, ParentLayerPixel>
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ParentLayerToParentLayerScale2D;
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typedef gfx::ScaleFactors2D<gfx::UnknownUnits, gfx::UnknownUnits> Scale2D;
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typedef gfx::Matrix4x4Typed<CSSPixel, CSSPixel> CSSToCSSMatrix4x4;
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typedef gfx::Matrix4x4Typed<LayoutDevicePixel, LayoutDevicePixel>
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LayoutDeviceToLayoutDeviceMatrix4x4;
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typedef gfx::Matrix4x4Typed<LayoutDevicePixel, ParentLayerPixel>
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LayoutDeviceToParentLayerMatrix4x4;
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typedef gfx::Matrix4x4Typed<LayerPixel, ParentLayerPixel>
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LayerToParentLayerMatrix4x4;
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typedef gfx::Matrix4x4Typed<LayerPixel, ScreenPixel> LayerToScreenMatrix4x4;
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typedef gfx::Matrix4x4Typed<ScreenPixel, ScreenPixel> ScreenToScreenMatrix4x4;
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typedef gfx::Matrix4x4Typed<ScreenPixel, ParentLayerPixel>
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ScreenToParentLayerMatrix4x4;
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typedef gfx::Matrix4x4Typed<ParentLayerPixel, LayerPixel>
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ParentLayerToLayerMatrix4x4;
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typedef gfx::Matrix4x4Typed<ParentLayerPixel, ScreenPixel>
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ParentLayerToScreenMatrix4x4;
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typedef gfx::Matrix4x4Typed<ParentLayerPixel, ParentLayerPixel>
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ParentLayerToParentLayerMatrix4x4;
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typedef gfx::Matrix4x4Typed<ParentLayerPixel, RenderTargetPixel>
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ParentLayerToRenderTargetMatrix4x4;
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typedef gfx::Matrix4x4Typed<ExternalPixel, ParentLayerPixel>
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ExternalToParentLayerMatrix4x4;
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/*
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* The pixels that content authors use to specify sizes in.
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*/
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struct CSSPixel {
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// Conversions from app units
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static CSSCoord FromAppUnits(nscoord aCoord) {
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return NSAppUnitsToFloatPixels(aCoord, float(AppUnitsPerCSSPixel()));
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}
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static CSSIntCoord FromAppUnitsRounded(nscoord aCoord) {
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return NSAppUnitsToIntPixels(aCoord, float(AppUnitsPerCSSPixel()));
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}
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static CSSPoint FromAppUnits(const nsPoint& aPoint) {
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return CSSPoint(FromAppUnits(aPoint.x), FromAppUnits(aPoint.y));
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}
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static CSSSize FromAppUnits(const nsSize& aSize) {
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return CSSSize(FromAppUnits(aSize.width), FromAppUnits(aSize.height));
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}
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static CSSRect FromAppUnits(const nsRect& aRect) {
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return CSSRect(FromAppUnits(aRect.x), FromAppUnits(aRect.y),
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FromAppUnits(aRect.Width()), FromAppUnits(aRect.Height()));
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}
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static CSSMargin FromAppUnits(const nsMargin& aMargin) {
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return CSSMargin(FromAppUnits(aMargin.top), FromAppUnits(aMargin.right),
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FromAppUnits(aMargin.bottom), FromAppUnits(aMargin.left));
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}
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static CSSIntPoint FromAppUnitsRounded(const nsPoint& aPoint) {
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return CSSIntPoint(FromAppUnitsRounded(aPoint.x),
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FromAppUnitsRounded(aPoint.y));
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}
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static CSSIntSize FromAppUnitsRounded(const nsSize& aSize) {
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return CSSIntSize(FromAppUnitsRounded(aSize.width),
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FromAppUnitsRounded(aSize.height));
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}
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static CSSIntRect FromAppUnitsRounded(const nsRect& aRect) {
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return CSSIntRect(FromAppUnitsRounded(aRect.x),
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FromAppUnitsRounded(aRect.y),
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FromAppUnitsRounded(aRect.Width()),
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FromAppUnitsRounded(aRect.Height()));
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}
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static CSSIntMargin FromAppUnitsRounded(const nsMargin& aMargin) {
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return CSSIntMargin(
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FromAppUnitsRounded(aMargin.top), FromAppUnitsRounded(aMargin.right),
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FromAppUnitsRounded(aMargin.bottom), FromAppUnitsRounded(aMargin.left));
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}
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static CSSIntRect FromAppUnitsToNearest(const nsRect& aRect) {
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return CSSIntRect::FromUnknownRect(
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aRect.ToNearestPixels(AppUnitsPerCSSPixel()));
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}
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static CSSIntRect FromAppUnitsToInside(const nsRect& aRect) {
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return CSSIntRect::FromUnknownRect(
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aRect.ToInsidePixels(AppUnitsPerCSSPixel()));
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}
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// Conversions to app units
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// TODO: We might want an int32_t/CSSIntCoord overload which doesn't do float
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// math but we'd need to ensure stuff is clamped to nscoord_MIN/MAX range.
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static nscoord ToAppUnits(CSSCoord aCoord) {
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return NSFloatPixelsToAppUnits(aCoord, AppUnitsPerCSSPixel());
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}
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static nsPoint ToAppUnits(const CSSPoint& aPoint) {
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return nsPoint(ToAppUnits(aPoint.x), ToAppUnits(aPoint.y));
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}
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static nsPoint ToAppUnits(const CSSIntPoint& aPoint) {
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return nsPoint(ToAppUnits(aPoint.x), ToAppUnits(aPoint.y));
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}
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static nsSize ToAppUnits(const CSSSize& aSize) {
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return nsSize(ToAppUnits(aSize.width), ToAppUnits(aSize.height));
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}
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static nsSize ToAppUnits(const CSSIntSize& aSize) {
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return nsSize(ToAppUnits(aSize.width), ToAppUnits(aSize.height));
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}
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static nsRect ToAppUnits(const CSSRect& aRect) {
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return nsRect(ToAppUnits(aRect.x), ToAppUnits(aRect.y),
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ToAppUnits(aRect.Width()), ToAppUnits(aRect.Height()));
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}
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static nsRect ToAppUnits(const CSSIntRect& aRect) {
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return nsRect(ToAppUnits(aRect.x), ToAppUnits(aRect.y),
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ToAppUnits(aRect.Width()), ToAppUnits(aRect.Height()));
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}
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static nsMargin ToAppUnits(const CSSMargin& aMargin) {
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return nsMargin(ToAppUnits(aMargin.top), ToAppUnits(aMargin.right),
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ToAppUnits(aMargin.bottom), ToAppUnits(aMargin.left));
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}
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static nsMargin ToAppUnits(const CSSIntMargin& aMargin) {
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return nsMargin(ToAppUnits(aMargin.top), ToAppUnits(aMargin.right),
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ToAppUnits(aMargin.bottom), ToAppUnits(aMargin.left));
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}
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// Conversion from a given CSS point value.
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static CSSCoord FromPoints(float aCoord) {
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// One inch / 72.
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return aCoord * 96.0f / 72.0f;
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}
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};
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/*
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* The pixels that are referred to as "device pixels" in layout code. In
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* general values measured in LayoutDevicePixels are obtained by dividing a
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* value in app units by AppUnitsPerDevPixel(). Conversion between CSS pixels
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* and LayoutDevicePixels is affected by:
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* 1) the "full zoom" (see nsPresContext::SetFullZoom)
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* 2) the "widget scale" (see nsIWidget::GetDefaultScale)
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*/
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struct LayoutDevicePixel {
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static LayoutDeviceCoord FromAppUnits(nscoord aCoord,
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nscoord aAppUnitsPerDevPixel) {
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return LayoutDeviceCoord(
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NSAppUnitsToFloatPixels(aCoord, float(aAppUnitsPerDevPixel)));
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}
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static LayoutDeviceIntCoord FromAppUnitsRounded(
|
|
nscoord aCoord, nscoord aAppUnitsPerDevPixel) {
|
|
return LayoutDeviceIntCoord(
|
|
NSAppUnitsToIntPixels(aCoord, float(aAppUnitsPerDevPixel)));
|
|
}
|
|
|
|
static LayoutDeviceRect FromAppUnits(const nsRect& aRect,
|
|
nscoord aAppUnitsPerDevPixel) {
|
|
return LayoutDeviceRect(FromAppUnits(aRect.x, aAppUnitsPerDevPixel),
|
|
FromAppUnits(aRect.y, aAppUnitsPerDevPixel),
|
|
FromAppUnits(aRect.Width(), aAppUnitsPerDevPixel),
|
|
FromAppUnits(aRect.Height(), aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static LayoutDeviceSize FromAppUnits(const nsSize& aSize,
|
|
nscoord aAppUnitsPerDevPixel) {
|
|
return LayoutDeviceSize(FromAppUnits(aSize.width, aAppUnitsPerDevPixel),
|
|
FromAppUnits(aSize.height, aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static LayoutDevicePoint FromAppUnits(const nsPoint& aPoint,
|
|
nscoord aAppUnitsPerDevPixel) {
|
|
return LayoutDevicePoint(FromAppUnits(aPoint.x, aAppUnitsPerDevPixel),
|
|
FromAppUnits(aPoint.y, aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static LayoutDeviceMargin FromAppUnits(const nsMargin& aMargin,
|
|
nscoord aAppUnitsPerDevPixel) {
|
|
return LayoutDeviceMargin(
|
|
FromAppUnits(aMargin.top, aAppUnitsPerDevPixel),
|
|
FromAppUnits(aMargin.right, aAppUnitsPerDevPixel),
|
|
FromAppUnits(aMargin.bottom, aAppUnitsPerDevPixel),
|
|
FromAppUnits(aMargin.left, aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static LayoutDeviceIntPoint FromAppUnitsRounded(
|
|
const nsPoint& aPoint, nscoord aAppUnitsPerDevPixel) {
|
|
return LayoutDeviceIntPoint(
|
|
FromAppUnitsRounded(aPoint.x, aAppUnitsPerDevPixel),
|
|
FromAppUnitsRounded(aPoint.y, aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static LayoutDeviceIntRect FromAppUnitsRounded(const nsRect& aRect,
|
|
nscoord aAppUnitsPerDevPixel) {
|
|
return LayoutDeviceIntRect(
|
|
FromAppUnitsRounded(aRect.x, aAppUnitsPerDevPixel),
|
|
FromAppUnitsRounded(aRect.y, aAppUnitsPerDevPixel),
|
|
FromAppUnitsRounded(aRect.Width(), aAppUnitsPerDevPixel),
|
|
FromAppUnitsRounded(aRect.Height(), aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static LayoutDeviceIntPoint FromAppUnitsToNearest(
|
|
const nsPoint& aPoint, nscoord aAppUnitsPerDevPixel) {
|
|
return LayoutDeviceIntPoint::FromUnknownPoint(
|
|
aPoint.ToNearestPixels(aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static LayoutDeviceIntRect FromAppUnitsToNearest(
|
|
const nsRect& aRect, nscoord aAppUnitsPerDevPixel) {
|
|
return LayoutDeviceIntRect::FromUnknownRect(
|
|
aRect.ToNearestPixels(aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static LayoutDeviceIntRect FromAppUnitsToInside(
|
|
const nsRect& aRect, nscoord aAppUnitsPerDevPixel) {
|
|
return LayoutDeviceIntRect::FromUnknownRect(
|
|
aRect.ToInsidePixels(aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static LayoutDeviceIntRect FromAppUnitsToOutside(
|
|
const nsRect& aRect, nscoord aAppUnitsPerDevPixel) {
|
|
return LayoutDeviceIntRect::FromUnknownRect(
|
|
aRect.ToOutsidePixels(aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static LayoutDeviceIntSize FromAppUnitsRounded(const nsSize& aSize,
|
|
nscoord aAppUnitsPerDevPixel) {
|
|
return LayoutDeviceIntSize(
|
|
FromAppUnitsRounded(aSize.width, aAppUnitsPerDevPixel),
|
|
FromAppUnitsRounded(aSize.height, aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static LayoutDeviceIntMargin FromAppUnitsRounded(
|
|
const nsMargin& aMargin, nscoord aAppUnitsPerDevPixel) {
|
|
return LayoutDeviceIntMargin(
|
|
FromAppUnitsRounded(aMargin.top, aAppUnitsPerDevPixel),
|
|
FromAppUnitsRounded(aMargin.right, aAppUnitsPerDevPixel),
|
|
FromAppUnitsRounded(aMargin.bottom, aAppUnitsPerDevPixel),
|
|
FromAppUnitsRounded(aMargin.left, aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static nscoord ToAppUnits(LayoutDeviceIntCoord aCoord,
|
|
nscoord aAppUnitsPerDevPixel) {
|
|
return aCoord * aAppUnitsPerDevPixel;
|
|
}
|
|
|
|
static nscoord ToAppUnits(int32_t aCoord, nscoord aAppUnitsPerDevPixel) {
|
|
return ToAppUnits(LayoutDeviceIntCoord(aCoord), aAppUnitsPerDevPixel);
|
|
}
|
|
|
|
static nscoord ToAppUnits(LayoutDeviceCoord aCoord,
|
|
nscoord aAppUnitsPerDevPixel) {
|
|
return NSFloatPixelsToAppUnits(aCoord, aAppUnitsPerDevPixel);
|
|
}
|
|
|
|
static nscoord ToAppUnits(float aCoord, nscoord aAppUnitsPerDevPixel) {
|
|
return ToAppUnits(LayoutDeviceCoord(aCoord), aAppUnitsPerDevPixel);
|
|
}
|
|
|
|
static nsPoint ToAppUnits(const LayoutDeviceIntPoint& aPoint,
|
|
nscoord aAppUnitsPerDevPixel) {
|
|
return nsPoint(ToAppUnits(aPoint.x, aAppUnitsPerDevPixel),
|
|
ToAppUnits(aPoint.y, aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static nsSize ToAppUnits(const LayoutDeviceIntSize& aSize,
|
|
nscoord aAppUnitsPerDevPixel) {
|
|
return nsSize(ToAppUnits(aSize.width, aAppUnitsPerDevPixel),
|
|
ToAppUnits(aSize.height, aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static nsSize ToAppUnits(const LayoutDeviceSize& aSize,
|
|
nscoord aAppUnitsPerDevPixel) {
|
|
return nsSize(ToAppUnits(aSize.width, aAppUnitsPerDevPixel),
|
|
ToAppUnits(aSize.height, aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static nsRect ToAppUnits(const LayoutDeviceIntRect& aRect,
|
|
nscoord aAppUnitsPerDevPixel) {
|
|
return nsRect(ToAppUnits(aRect.x, aAppUnitsPerDevPixel),
|
|
ToAppUnits(aRect.y, aAppUnitsPerDevPixel),
|
|
ToAppUnits(aRect.Width(), aAppUnitsPerDevPixel),
|
|
ToAppUnits(aRect.Height(), aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static nsRect ToAppUnits(const LayoutDeviceRect& aRect,
|
|
nscoord aAppUnitsPerDevPixel) {
|
|
return nsRect(ToAppUnits(aRect.x, aAppUnitsPerDevPixel),
|
|
ToAppUnits(aRect.y, aAppUnitsPerDevPixel),
|
|
ToAppUnits(aRect.Width(), aAppUnitsPerDevPixel),
|
|
ToAppUnits(aRect.Height(), aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static nsMargin ToAppUnits(const LayoutDeviceIntMargin& aMargin,
|
|
nscoord aAppUnitsPerDevPixel) {
|
|
return nsMargin(ToAppUnits(aMargin.top, aAppUnitsPerDevPixel),
|
|
ToAppUnits(aMargin.right, aAppUnitsPerDevPixel),
|
|
ToAppUnits(aMargin.bottom, aAppUnitsPerDevPixel),
|
|
ToAppUnits(aMargin.left, aAppUnitsPerDevPixel));
|
|
}
|
|
|
|
static nsMargin ToAppUnits(const LayoutDeviceMargin& aMargin,
|
|
nscoord aAppUnitsPerDevPixel) {
|
|
return nsMargin(ToAppUnits(aMargin.top, aAppUnitsPerDevPixel),
|
|
ToAppUnits(aMargin.right, aAppUnitsPerDevPixel),
|
|
ToAppUnits(aMargin.bottom, aAppUnitsPerDevPixel),
|
|
ToAppUnits(aMargin.left, aAppUnitsPerDevPixel));
|
|
}
|
|
};
|
|
|
|
/*
|
|
* The pixels that layout rasterizes and delivers to the graphics code.
|
|
* These also are generally referred to as "device pixels" in layout code.
|
|
* Conversion between CSS pixels and LayerPixels is affected by:
|
|
* 1) the "display resolution" (see PresShell::SetResolution)
|
|
* 2) the "full zoom" (see nsPresContext::SetFullZoom)
|
|
* 3) the "widget scale" (see nsIWidget::GetDefaultScale)
|
|
* 4) rasterizing at a different scale in the presence of some CSS transforms
|
|
*/
|
|
struct LayerPixel {};
|
|
|
|
/*
|
|
* This is Layer coordinates with the Layer's CSS transform applied.
|
|
* It can be thought of as intermediate between LayerPixel and
|
|
* ParentLayerPixel, as further applying async transforms to this
|
|
* yields ParentLayerPixels.
|
|
*/
|
|
struct CSSTransformedLayerPixel {};
|
|
|
|
/*
|
|
* Layers are always composited to a render target. This unit
|
|
* represents one pixel in the render target. Note that for the
|
|
* root render target RenderTargetPixel == ScreenPixel. Also
|
|
* any ContainerLayer providing an intermediate surface will
|
|
* have RenderTargetPixel == LayerPixel.
|
|
*/
|
|
struct RenderTargetPixel {};
|
|
|
|
/*
|
|
* This unit represents one pixel in an image. Image space
|
|
* is largely independent of any other space.
|
|
*/
|
|
struct ImagePixel {};
|
|
|
|
/*
|
|
* The pixels that are displayed on the screen.
|
|
* On non-OMTC platforms this should be equivalent to LayerPixel units.
|
|
* On OMTC platforms these may diverge from LayerPixel units temporarily,
|
|
* while an asynchronous zoom is happening, but should eventually converge
|
|
* back to LayerPixel units. Some variables (such as those representing
|
|
* chrome UI element sizes) that are not subject to content zoom should
|
|
* generally be represented in ScreenPixel units.
|
|
*/
|
|
struct ScreenPixel {};
|
|
|
|
/* The layer coordinates of the parent frame.
|
|
* This can be arrived at in three ways:
|
|
* - Start with the CSS coordinates of the parent frame, multiply by the
|
|
* device scale and the cumulative resolution of the parent frame.
|
|
* - Start with the CSS coordinates of current frame, multiply by the device
|
|
* scale, the cumulative resolution of the current frame, and the scales
|
|
* from the CSS and async transforms of the current frame.
|
|
* - Start with global screen coordinates and unapply all CSS and async
|
|
* transforms from the root down to and including the parent.
|
|
* It's helpful to look at
|
|
* https://wiki.mozilla.org/Platform/GFX/APZ#Coordinate_systems to get a picture
|
|
* of how the various coordinate systems relate to each other.
|
|
*/
|
|
struct ParentLayerPixel {};
|
|
|
|
/*
|
|
* Pixels in the coordinate space used by the host OS to manage windows on the
|
|
* desktop. What these mean varies between OSs:
|
|
* - by default (unless implemented differently in platform-specific widget
|
|
* code) they are the same as LayoutDevicePixels
|
|
* - on Mac OS X, they're "cocoa points", which correspond to device pixels
|
|
* on a non-Retina display, and to 2x device pixels on Retina
|
|
* - on Windows *without* per-monitor DPI support, they are Windows "logical
|
|
* pixels", i.e. device pixels scaled according to the Windows display DPI
|
|
* scaling factor (typically one of 1.25, 1.5, 1.75, 2.0...)
|
|
* - on Windows *with* per-monitor DPI support, they are physical device pixels
|
|
* on each screen; note that this means the scaling between CSS pixels and
|
|
* desktop pixels may vary across multiple displays.
|
|
*/
|
|
struct DesktopPixel {};
|
|
|
|
struct ExternalPixel {};
|
|
|
|
// Operators to apply ScaleFactors directly to Coords, Points, Rects, Sizes and
|
|
// Margins
|
|
|
|
template <class Src, class Dst>
|
|
gfx::CoordTyped<Dst> operator*(const gfx::CoordTyped<Src>& aCoord,
|
|
const gfx::ScaleFactor<Src, Dst>& aScale) {
|
|
return gfx::CoordTyped<Dst>(aCoord.value * aScale.scale);
|
|
}
|
|
|
|
template <class Src, class Dst>
|
|
gfx::CoordTyped<Dst> operator/(const gfx::CoordTyped<Src>& aCoord,
|
|
const gfx::ScaleFactor<Dst, Src>& aScale) {
|
|
return gfx::CoordTyped<Dst>(aCoord.value / aScale.scale);
|
|
}
|
|
|
|
template <class Src, class Dst>
|
|
gfx::PointTyped<Dst> operator*(const gfx::PointTyped<Src>& aPoint,
|
|
const gfx::ScaleFactor<Src, Dst>& aScale) {
|
|
return gfx::PointTyped<Dst>(aPoint.x * aScale.scale, aPoint.y * aScale.scale);
|
|
}
|
|
|
|
template <class Src, class Dst>
|
|
gfx::PointTyped<Dst> operator/(const gfx::PointTyped<Src>& aPoint,
|
|
const gfx::ScaleFactor<Dst, Src>& aScale) {
|
|
return gfx::PointTyped<Dst>(aPoint.x / aScale.scale, aPoint.y / aScale.scale);
|
|
}
|
|
|
|
template <class Src, class Dst, class F>
|
|
gfx::PointTyped<Dst, F> operator*(
|
|
const gfx::PointTyped<Src, F>& aPoint,
|
|
const gfx::BaseScaleFactors2D<Src, Dst, F>& aScale) {
|
|
return gfx::PointTyped<Dst, F>(aPoint.x * aScale.xScale,
|
|
aPoint.y * aScale.yScale);
|
|
}
|
|
|
|
template <class Src, class Dst, class F>
|
|
gfx::PointTyped<Dst, F> operator/(
|
|
const gfx::PointTyped<Src, F>& aPoint,
|
|
const gfx::BaseScaleFactors2D<Dst, Src, F>& aScale) {
|
|
return gfx::PointTyped<Dst, F>(aPoint.x / aScale.xScale,
|
|
aPoint.y / aScale.yScale);
|
|
}
|
|
|
|
template <class Src, class Dst>
|
|
gfx::PointTyped<Dst> operator*(const gfx::IntPointTyped<Src>& aPoint,
|
|
const gfx::ScaleFactor<Src, Dst>& aScale) {
|
|
return gfx::PointTyped<Dst>(float(aPoint.x) * aScale.scale,
|
|
float(aPoint.y) * aScale.scale);
|
|
}
|
|
|
|
template <class Src, class Dst>
|
|
gfx::PointTyped<Dst> operator/(const gfx::IntPointTyped<Src>& aPoint,
|
|
const gfx::ScaleFactor<Dst, Src>& aScale) {
|
|
return gfx::PointTyped<Dst>(float(aPoint.x) / aScale.scale,
|
|
float(aPoint.y) / aScale.scale);
|
|
}
|
|
|
|
template <class Src, class Dst, class F>
|
|
gfx::PointTyped<Dst, F> operator*(
|
|
const gfx::IntPointTyped<Src>& aPoint,
|
|
const gfx::BaseScaleFactors2D<Src, Dst, F>& aScale) {
|
|
return gfx::PointTyped<Dst, F>(F(aPoint.x) * aScale.xScale,
|
|
F(aPoint.y) * aScale.yScale);
|
|
}
|
|
|
|
template <class Src, class Dst, class F>
|
|
gfx::PointTyped<Dst, F> operator/(
|
|
const gfx::IntPointTyped<Src>& aPoint,
|
|
const gfx::BaseScaleFactors2D<Dst, Src, F>& aScale) {
|
|
return gfx::PointTyped<Dst, F>(F(aPoint.x) / aScale.xScale,
|
|
F(aPoint.y) / aScale.yScale);
|
|
}
|
|
|
|
template <class Src, class Dst>
|
|
gfx::RectTyped<Dst> operator*(const gfx::RectTyped<Src>& aRect,
|
|
const gfx::ScaleFactor<Src, Dst>& aScale) {
|
|
return gfx::RectTyped<Dst>(aRect.x * aScale.scale, aRect.y * aScale.scale,
|
|
aRect.Width() * aScale.scale,
|
|
aRect.Height() * aScale.scale);
|
|
}
|
|
|
|
template <class Src, class Dst>
|
|
gfx::RectTyped<Dst> operator/(const gfx::RectTyped<Src>& aRect,
|
|
const gfx::ScaleFactor<Dst, Src>& aScale) {
|
|
return gfx::RectTyped<Dst>(aRect.x / aScale.scale, aRect.y / aScale.scale,
|
|
aRect.Width() / aScale.scale,
|
|
aRect.Height() / aScale.scale);
|
|
}
|
|
|
|
template <class Src, class Dst, class F>
|
|
gfx::RectTyped<Dst, F> operator*(
|
|
const gfx::RectTyped<Src, F>& aRect,
|
|
const gfx::BaseScaleFactors2D<Src, Dst, F>& aScale) {
|
|
return gfx::RectTyped<Dst, F>(
|
|
aRect.x * aScale.xScale, aRect.y * aScale.yScale,
|
|
aRect.Width() * aScale.xScale, aRect.Height() * aScale.yScale);
|
|
}
|
|
|
|
template <class Src, class Dst, class F>
|
|
gfx::RectTyped<Dst, F> operator/(
|
|
const gfx::RectTyped<Src, F>& aRect,
|
|
const gfx::BaseScaleFactors2D<Dst, Src, F>& aScale) {
|
|
return gfx::RectTyped<Dst, F>(
|
|
aRect.x / aScale.xScale, aRect.y / aScale.yScale,
|
|
aRect.Width() / aScale.xScale, aRect.Height() / aScale.yScale);
|
|
}
|
|
|
|
template <class Src, class Dst>
|
|
gfx::RectTyped<Dst> operator*(const gfx::IntRectTyped<Src>& aRect,
|
|
const gfx::ScaleFactor<Src, Dst>& aScale) {
|
|
return gfx::RectTyped<Dst>(float(aRect.x) * aScale.scale,
|
|
float(aRect.y) * aScale.scale,
|
|
float(aRect.Width()) * aScale.scale,
|
|
float(aRect.Height()) * aScale.scale);
|
|
}
|
|
|
|
template <class Src, class Dst>
|
|
gfx::RectTyped<Dst> operator/(const gfx::IntRectTyped<Src>& aRect,
|
|
const gfx::ScaleFactor<Dst, Src>& aScale) {
|
|
return gfx::RectTyped<Dst>(float(aRect.x) / aScale.scale,
|
|
float(aRect.y) / aScale.scale,
|
|
float(aRect.Width()) / aScale.scale,
|
|
float(aRect.Height()) / aScale.scale);
|
|
}
|
|
|
|
template <class Src, class Dst, class F>
|
|
gfx::RectTyped<Dst, F> operator*(
|
|
const gfx::IntRectTyped<Src>& aRect,
|
|
const gfx::BaseScaleFactors2D<Src, Dst, F>& aScale) {
|
|
return gfx::RectTyped<Dst, F>(
|
|
F(aRect.x) * aScale.xScale, F(aRect.y) * aScale.yScale,
|
|
F(aRect.Width()) * aScale.xScale, F(aRect.Height()) * aScale.yScale);
|
|
}
|
|
|
|
template <class Src, class Dst, class F>
|
|
gfx::RectTyped<Dst, F> operator/(
|
|
const gfx::IntRectTyped<Src>& aRect,
|
|
const gfx::BaseScaleFactors2D<Dst, Src, F>& aScale) {
|
|
return gfx::RectTyped<Dst, F>(
|
|
F(aRect.x) / aScale.xScale, F(aRect.y) / aScale.yScale,
|
|
F(aRect.Width()) / aScale.xScale, F(aRect.Height()) / aScale.yScale);
|
|
}
|
|
|
|
template <class Src, class Dst>
|
|
gfx::SizeTyped<Dst> operator*(const gfx::SizeTyped<Src>& aSize,
|
|
const gfx::ScaleFactor<Src, Dst>& aScale) {
|
|
return gfx::SizeTyped<Dst>(aSize.width * aScale.scale,
|
|
aSize.height * aScale.scale);
|
|
}
|
|
|
|
template <class Src, class Dst>
|
|
gfx::SizeTyped<Dst> operator/(const gfx::SizeTyped<Src>& aSize,
|
|
const gfx::ScaleFactor<Dst, Src>& aScale) {
|
|
return gfx::SizeTyped<Dst>(aSize.width / aScale.scale,
|
|
aSize.height / aScale.scale);
|
|
}
|
|
|
|
template <class Src, class Dst, class F>
|
|
gfx::SizeTyped<Dst, F> operator*(
|
|
const gfx::SizeTyped<Src, F>& aSize,
|
|
const gfx::BaseScaleFactors2D<Src, Dst, F>& aScale) {
|
|
return gfx::SizeTyped<Dst, F>(aSize.width * aScale.xScale,
|
|
aSize.height * aScale.yScale);
|
|
}
|
|
|
|
template <class Src, class Dst, class F>
|
|
gfx::SizeTyped<Dst, F> operator/(
|
|
const gfx::SizeTyped<Src, F>& aSize,
|
|
const gfx::BaseScaleFactors2D<Dst, Src, F>& aScale) {
|
|
return gfx::SizeTyped<Dst, F>(aSize.width / aScale.xScale,
|
|
aSize.height / aScale.yScale);
|
|
}
|
|
|
|
template <class Src, class Dst>
|
|
gfx::SizeTyped<Dst> operator*(const gfx::IntSizeTyped<Src>& aSize,
|
|
const gfx::ScaleFactor<Src, Dst>& aScale) {
|
|
return gfx::SizeTyped<Dst>(float(aSize.width) * aScale.scale,
|
|
float(aSize.height) * aScale.scale);
|
|
}
|
|
|
|
template <class Src, class Dst>
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|
gfx::SizeTyped<Dst> operator/(const gfx::IntSizeTyped<Src>& aSize,
|
|
const gfx::ScaleFactor<Dst, Src>& aScale) {
|
|
return gfx::SizeTyped<Dst>(float(aSize.width) / aScale.scale,
|
|
float(aSize.height) / aScale.scale);
|
|
}
|
|
|
|
template <class Src, class Dst, class F>
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|
gfx::SizeTyped<Dst, F> operator*(
|
|
const gfx::IntSizeTyped<Src>& aSize,
|
|
const gfx::BaseScaleFactors2D<Src, Dst, F>& aScale) {
|
|
return gfx::SizeTyped<Dst, F>(F(aSize.width) * aScale.xScale,
|
|
F(aSize.height) * aScale.yScale);
|
|
}
|
|
|
|
template <class Src, class Dst, class F>
|
|
gfx::SizeTyped<Dst, F> operator/(
|
|
const gfx::IntSizeTyped<Src>& aSize,
|
|
const gfx::BaseScaleFactors2D<Dst, Src, F>& aScale) {
|
|
return gfx::SizeTyped<Dst, F>(F(aSize.width) / aScale.xScale,
|
|
F(aSize.height) / aScale.yScale);
|
|
}
|
|
|
|
template <class Src, class Dst>
|
|
gfx::MarginTyped<Dst> operator*(const gfx::MarginTyped<Src>& aMargin,
|
|
const gfx::ScaleFactor<Src, Dst>& aScale) {
|
|
return gfx::MarginTyped<Dst>(
|
|
aMargin.top * aScale.scale, aMargin.right * aScale.scale,
|
|
aMargin.bottom * aScale.scale, aMargin.left * aScale.scale);
|
|
}
|
|
|
|
template <class Src, class Dst>
|
|
gfx::MarginTyped<Dst> operator/(const gfx::MarginTyped<Src>& aMargin,
|
|
const gfx::ScaleFactor<Dst, Src>& aScale) {
|
|
return gfx::MarginTyped<Dst>(
|
|
aMargin.top / aScale.scale, aMargin.right / aScale.scale,
|
|
aMargin.bottom / aScale.scale, aMargin.left / aScale.scale);
|
|
}
|
|
|
|
template <class Src, class Dst, class F>
|
|
gfx::MarginTyped<Dst, F> operator*(
|
|
const gfx::MarginTyped<Src, F>& aMargin,
|
|
const gfx::BaseScaleFactors2D<Src, Dst, F>& aScale) {
|
|
return gfx::MarginTyped<Dst, F>(
|
|
aMargin.top * aScale.yScale, aMargin.right * aScale.xScale,
|
|
aMargin.bottom * aScale.yScale, aMargin.left * aScale.xScale);
|
|
}
|
|
|
|
template <class Src, class Dst, class F>
|
|
gfx::MarginTyped<Dst, F> operator/(
|
|
const gfx::MarginTyped<Src, F>& aMargin,
|
|
const gfx::BaseScaleFactors2D<Dst, Src, F>& aScale) {
|
|
return gfx::MarginTyped<Dst, F>(
|
|
aMargin.top / aScale.yScale, aMargin.right / aScale.xScale,
|
|
aMargin.bottom / aScale.yScale, aMargin.left / aScale.xScale);
|
|
}
|
|
|
|
// Calculate the max or min or the ratios of the widths and heights of two
|
|
// sizes, returning a scale factor in the correct units.
|
|
|
|
template <class Src, class Dst>
|
|
gfx::ScaleFactor<Src, Dst> MaxScaleRatio(const gfx::SizeTyped<Dst>& aDestSize,
|
|
const gfx::SizeTyped<Src>& aSrcSize) {
|
|
MOZ_ASSERT(aSrcSize.width != 0 && aSrcSize.height != 0,
|
|
"Caller must verify aSrcSize has nonzero components, "
|
|
"to avoid division by 0 here");
|
|
return gfx::ScaleFactor<Src, Dst>(std::max(
|
|
aDestSize.width / aSrcSize.width, aDestSize.height / aSrcSize.height));
|
|
}
|
|
|
|
template <class Src, class Dst>
|
|
gfx::ScaleFactor<Src, Dst> MinScaleRatio(const gfx::SizeTyped<Dst>& aDestSize,
|
|
const gfx::SizeTyped<Src>& aSrcSize) {
|
|
MOZ_ASSERT(aSrcSize.width != 0 && aSrcSize.height != 0,
|
|
"Caller must verify aSrcSize has nonzero components, "
|
|
"to avoid division by 0 here");
|
|
return gfx::ScaleFactor<Src, Dst>(std::min(
|
|
aDestSize.width / aSrcSize.width, aDestSize.height / aSrcSize.height));
|
|
}
|
|
|
|
template <typename T>
|
|
struct CoordOfImpl;
|
|
|
|
template <typename Units>
|
|
struct CoordOfImpl<gfx::PointTyped<Units>> {
|
|
typedef gfx::CoordTyped<Units> Type;
|
|
};
|
|
|
|
template <typename Units>
|
|
struct CoordOfImpl<gfx::IntPointTyped<Units>> {
|
|
typedef gfx::IntCoordTyped<Units> Type;
|
|
};
|
|
|
|
template <typename Units>
|
|
struct CoordOfImpl<gfx::RectTyped<Units>> {
|
|
typedef gfx::CoordTyped<Units> Type;
|
|
};
|
|
|
|
template <typename Units>
|
|
struct CoordOfImpl<gfx::IntRectTyped<Units>> {
|
|
typedef gfx::IntCoordTyped<Units> Type;
|
|
};
|
|
|
|
template <typename Units>
|
|
struct CoordOfImpl<gfx::SizeTyped<Units>> {
|
|
typedef gfx::CoordTyped<Units> Type;
|
|
};
|
|
|
|
template <typename T>
|
|
using CoordOf = typename CoordOfImpl<T>::Type;
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif
|