654 lines
32 KiB
C++
654 lines
32 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "mozilla/gfx/Coord.h"
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#include "mozilla/gfx/Matrix.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/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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#include "mozilla/TypeTraits.h"
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namespace mozilla {
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template <typename T>
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struct IsPixel : FalseType {};
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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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template<> struct IsPixel<CSSPixel> : TrueType {};
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template<> struct IsPixel<LayoutDevicePixel> : TrueType {};
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template<> struct IsPixel<LayerPixel> : TrueType {};
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template<> struct IsPixel<CSSTransformedLayerPixel> : TrueType {};
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template<> struct IsPixel<RenderTargetPixel> : TrueType {};
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template<> struct IsPixel<ScreenPixel> : TrueType {};
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template<> struct IsPixel<ParentLayerPixel> : TrueType {};
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template<> struct IsPixel<DesktopPixel> : TrueType {};
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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::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> CSSTransformedLayerIntCoord;
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typedef gfx::PointTyped<CSSTransformedLayerPixel> CSSTransformedLayerPoint;
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typedef gfx::IntPointTyped<CSSTransformedLayerPixel> 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> CSSTransformedLayerIntMargin;
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typedef gfx::IntRegionTyped<CSSTransformedLayerPixel> 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::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::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<LayoutDevicePixel, CSSPixel> LayoutDeviceToCSSScale;
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typedef gfx::ScaleFactor<LayoutDevicePixel, LayerPixel> LayoutDeviceToLayerScale;
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typedef gfx::ScaleFactor<LayoutDevicePixel, ScreenPixel> LayoutDeviceToScreenScale;
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typedef gfx::ScaleFactor<LayoutDevicePixel, ParentLayerPixel> LayoutDeviceToParentLayerScale;
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typedef gfx::ScaleFactor<LayerPixel, CSSPixel> LayerToCSSScale;
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typedef gfx::ScaleFactor<LayerPixel, LayoutDevicePixel> LayerToLayoutDeviceScale;
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typedef gfx::ScaleFactor<LayerPixel, RenderTargetPixel> 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> RenderTargetToScreenScale;
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typedef gfx::ScaleFactor<ScreenPixel, CSSPixel> ScreenToCSSScale;
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typedef gfx::ScaleFactor<ScreenPixel, LayoutDevicePixel> ScreenToLayoutDeviceScale;
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typedef gfx::ScaleFactor<ScreenPixel, LayerPixel> ScreenToLayerScale;
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typedef gfx::ScaleFactor<ScreenPixel, ParentLayerPixel> ScreenToParentLayerScale;
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typedef gfx::ScaleFactor<ParentLayerPixel, LayerPixel> ParentLayerToLayerScale;
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typedef gfx::ScaleFactor<ParentLayerPixel, ScreenPixel> ParentLayerToScreenScale;
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typedef gfx::ScaleFactor<ParentLayerPixel, ParentLayerPixel> ParentLayerToParentLayerScale;
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typedef gfx::ScaleFactor<DesktopPixel, LayoutDevicePixel> DesktopToLayoutDeviceScale;
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typedef gfx::ScaleFactors2D<CSSPixel, LayoutDevicePixel> 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> LayoutDeviceToCSSScale2D;
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typedef gfx::ScaleFactors2D<LayoutDevicePixel, LayerPixel> LayoutDeviceToLayerScale2D;
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typedef gfx::ScaleFactors2D<LayoutDevicePixel, ScreenPixel> LayoutDeviceToScreenScale2D;
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typedef gfx::ScaleFactors2D<LayoutDevicePixel, ParentLayerPixel> LayoutDeviceToParentLayerScale2D;
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typedef gfx::ScaleFactors2D<LayerPixel, CSSPixel> LayerToCSSScale2D;
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typedef gfx::ScaleFactors2D<LayerPixel, LayoutDevicePixel> LayerToLayoutDeviceScale2D;
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typedef gfx::ScaleFactors2D<LayerPixel, RenderTargetPixel> LayerToRenderTargetScale2D;
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typedef gfx::ScaleFactors2D<LayerPixel, ScreenPixel> LayerToScreenScale2D;
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typedef gfx::ScaleFactors2D<LayerPixel, ParentLayerPixel> LayerToParentLayerScale2D;
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typedef gfx::ScaleFactors2D<RenderTargetPixel, ScreenPixel> RenderTargetToScreenScale2D;
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typedef gfx::ScaleFactors2D<ScreenPixel, CSSPixel> ScreenToCSSScale2D;
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typedef gfx::ScaleFactors2D<ScreenPixel, LayoutDevicePixel> ScreenToLayoutDeviceScale2D;
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typedef gfx::ScaleFactors2D<ScreenPixel, LayerPixel> ScreenToLayerScale2D;
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typedef gfx::ScaleFactors2D<ScreenPixel, ParentLayerPixel> ScreenToParentLayerScale2D;
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typedef gfx::ScaleFactors2D<ParentLayerPixel, LayerPixel> ParentLayerToLayerScale2D;
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typedef gfx::ScaleFactors2D<ParentLayerPixel, ScreenPixel> ParentLayerToScreenScale2D;
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typedef gfx::ScaleFactors2D<ParentLayerPixel, ParentLayerPixel> ParentLayerToParentLayerScale2D;
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typedef gfx::Matrix4x4Typed<LayoutDevicePixel, LayoutDevicePixel> LayoutDeviceToLayoutDeviceMatrix4x4;
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typedef gfx::Matrix4x4Typed<LayerPixel, ParentLayerPixel> LayerToParentLayerMatrix4x4;
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typedef gfx::Matrix4x4Typed<ScreenPixel, ScreenPixel> ScreenToScreenMatrix4x4;
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typedef gfx::Matrix4x4Typed<ScreenPixel, ParentLayerPixel> ScreenToParentLayerMatrix4x4;
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typedef gfx::Matrix4x4Typed<ParentLayerPixel, LayerPixel> ParentLayerToLayerMatrix4x4;
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typedef gfx::Matrix4x4Typed<ParentLayerPixel, ScreenPixel> ParentLayerToScreenMatrix4x4;
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typedef gfx::Matrix4x4Typed<ParentLayerPixel, ParentLayerPixel> ParentLayerToParentLayerMatrix4x4;
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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 CSSPoint FromAppUnits(const nsPoint& aPoint) {
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return CSSPoint(NSAppUnitsToFloatPixels(aPoint.x, float(AppUnitsPerCSSPixel())),
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NSAppUnitsToFloatPixels(aPoint.y, float(AppUnitsPerCSSPixel())));
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}
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static CSSSize FromAppUnits(const nsSize& aSize) {
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return CSSSize(NSAppUnitsToFloatPixels(aSize.width, float(AppUnitsPerCSSPixel())),
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NSAppUnitsToFloatPixels(aSize.height, float(AppUnitsPerCSSPixel())));
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}
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static CSSRect FromAppUnits(const nsRect& aRect) {
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return CSSRect(NSAppUnitsToFloatPixels(aRect.x, float(AppUnitsPerCSSPixel())),
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NSAppUnitsToFloatPixels(aRect.y, float(AppUnitsPerCSSPixel())),
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NSAppUnitsToFloatPixels(aRect.width, float(AppUnitsPerCSSPixel())),
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NSAppUnitsToFloatPixels(aRect.height, float(AppUnitsPerCSSPixel())));
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}
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static CSSMargin FromAppUnits(const nsMargin& aMargin) {
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return CSSMargin(NSAppUnitsToFloatPixels(aMargin.top, float(AppUnitsPerCSSPixel())),
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NSAppUnitsToFloatPixels(aMargin.right, float(AppUnitsPerCSSPixel())),
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NSAppUnitsToFloatPixels(aMargin.bottom, float(AppUnitsPerCSSPixel())),
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NSAppUnitsToFloatPixels(aMargin.left, float(AppUnitsPerCSSPixel())));
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}
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static CSSIntPoint FromAppUnitsRounded(const nsPoint& aPoint) {
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return CSSIntPoint(NSAppUnitsToIntPixels(aPoint.x, float(AppUnitsPerCSSPixel())),
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NSAppUnitsToIntPixels(aPoint.y, float(AppUnitsPerCSSPixel())));
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}
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static CSSIntSize FromAppUnitsRounded(const nsSize& aSize)
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{
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return CSSIntSize(NSAppUnitsToIntPixels(aSize.width, float(AppUnitsPerCSSPixel())),
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NSAppUnitsToIntPixels(aSize.height, float(AppUnitsPerCSSPixel())));
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}
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static CSSIntRect FromAppUnitsRounded(const nsRect& aRect) {
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return CSSIntRect(NSAppUnitsToIntPixels(aRect.x, float(AppUnitsPerCSSPixel())),
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NSAppUnitsToIntPixels(aRect.y, float(AppUnitsPerCSSPixel())),
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NSAppUnitsToIntPixels(aRect.width, float(AppUnitsPerCSSPixel())),
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NSAppUnitsToIntPixels(aRect.height, float(AppUnitsPerCSSPixel())));
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}
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// Conversions to app units
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static nsPoint ToAppUnits(const CSSPoint& aPoint) {
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return nsPoint(NSToCoordRoundWithClamp(aPoint.x * float(AppUnitsPerCSSPixel())),
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NSToCoordRoundWithClamp(aPoint.y * float(AppUnitsPerCSSPixel())));
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}
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static nsPoint ToAppUnits(const CSSIntPoint& aPoint) {
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return nsPoint(NSToCoordRoundWithClamp(float(aPoint.x) * float(AppUnitsPerCSSPixel())),
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NSToCoordRoundWithClamp(float(aPoint.y) * float(AppUnitsPerCSSPixel())));
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}
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static nsSize ToAppUnits(const CSSSize& aSize) {
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return nsSize(NSToCoordRoundWithClamp(aSize.width * float(AppUnitsPerCSSPixel())),
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NSToCoordRoundWithClamp(aSize.height * float(AppUnitsPerCSSPixel())));
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}
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static nsSize ToAppUnits(const CSSIntSize& aSize) {
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return nsSize(NSToCoordRoundWithClamp(float(aSize.width) * float(AppUnitsPerCSSPixel())),
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NSToCoordRoundWithClamp(float(aSize.height) * float(AppUnitsPerCSSPixel())));
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}
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static nsRect ToAppUnits(const CSSRect& aRect) {
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return nsRect(NSToCoordRoundWithClamp(aRect.x * float(AppUnitsPerCSSPixel())),
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NSToCoordRoundWithClamp(aRect.y * float(AppUnitsPerCSSPixel())),
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NSToCoordRoundWithClamp(aRect.width * float(AppUnitsPerCSSPixel())),
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NSToCoordRoundWithClamp(aRect.height * float(AppUnitsPerCSSPixel())));
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}
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static nsRect ToAppUnits(const CSSIntRect& aRect) {
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return nsRect(NSToCoordRoundWithClamp(float(aRect.x) * float(AppUnitsPerCSSPixel())),
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NSToCoordRoundWithClamp(float(aRect.y) * float(AppUnitsPerCSSPixel())),
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NSToCoordRoundWithClamp(float(aRect.width) * float(AppUnitsPerCSSPixel())),
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NSToCoordRoundWithClamp(float(aRect.height) * float(AppUnitsPerCSSPixel())));
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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 LayoutDeviceRect FromAppUnits(const nsRect& aRect, nscoord aAppUnitsPerDevPixel) {
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return LayoutDeviceRect(NSAppUnitsToFloatPixels(aRect.x, float(aAppUnitsPerDevPixel)),
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NSAppUnitsToFloatPixels(aRect.y, float(aAppUnitsPerDevPixel)),
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NSAppUnitsToFloatPixels(aRect.width, float(aAppUnitsPerDevPixel)),
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NSAppUnitsToFloatPixels(aRect.height, float(aAppUnitsPerDevPixel)));
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}
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static LayoutDevicePoint FromAppUnits(const nsPoint& aPoint, nscoord aAppUnitsPerDevPixel) {
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return LayoutDevicePoint(NSAppUnitsToFloatPixels(aPoint.x, aAppUnitsPerDevPixel),
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NSAppUnitsToFloatPixels(aPoint.y, aAppUnitsPerDevPixel));
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}
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static LayoutDeviceMargin FromAppUnits(const nsMargin& aMargin, nscoord aAppUnitsPerDevPixel) {
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return LayoutDeviceMargin(NSAppUnitsToFloatPixels(aMargin.top, aAppUnitsPerDevPixel),
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NSAppUnitsToFloatPixels(aMargin.right, aAppUnitsPerDevPixel),
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NSAppUnitsToFloatPixels(aMargin.bottom, aAppUnitsPerDevPixel),
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NSAppUnitsToFloatPixels(aMargin.left, aAppUnitsPerDevPixel));
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}
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static LayoutDeviceIntPoint FromAppUnitsRounded(const nsPoint& aPoint, nscoord aAppUnitsPerDevPixel) {
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return LayoutDeviceIntPoint(NSAppUnitsToIntPixels(aPoint.x, aAppUnitsPerDevPixel),
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NSAppUnitsToIntPixels(aPoint.y, aAppUnitsPerDevPixel));
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}
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static LayoutDeviceIntPoint FromAppUnitsToNearest(const nsPoint& aPoint, nscoord aAppUnitsPerDevPixel) {
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return LayoutDeviceIntPoint::FromUnknownPoint(aPoint.ToNearestPixels(aAppUnitsPerDevPixel));
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}
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static LayoutDeviceIntRect FromAppUnitsToNearest(const nsRect& aRect, nscoord aAppUnitsPerDevPixel) {
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return LayoutDeviceIntRect::FromUnknownRect(aRect.ToNearestPixels(aAppUnitsPerDevPixel));
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}
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static LayoutDeviceIntRect FromAppUnitsToInside(const nsRect& aRect, nscoord aAppUnitsPerDevPixel) {
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return LayoutDeviceIntRect::FromUnknownRect(aRect.ToInsidePixels(aAppUnitsPerDevPixel));
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}
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static LayoutDeviceIntSize FromAppUnitsRounded(const nsSize& aSize, nscoord aAppUnitsPerDevPixel) {
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return LayoutDeviceIntSize(
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NSAppUnitsToIntPixels(aSize.width, aAppUnitsPerDevPixel),
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NSAppUnitsToIntPixels(aSize.height, aAppUnitsPerDevPixel));
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}
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static nsPoint ToAppUnits(const LayoutDeviceIntPoint& aPoint, nscoord aAppUnitsPerDevPixel) {
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return nsPoint(aPoint.x * aAppUnitsPerDevPixel,
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aPoint.y * aAppUnitsPerDevPixel);
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}
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static nsSize ToAppUnits(const LayoutDeviceIntSize& aSize, nscoord aAppUnitsPerDevPixel) {
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return nsSize(aSize.width * aAppUnitsPerDevPixel,
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aSize.height * aAppUnitsPerDevPixel);
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}
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static nsSize ToAppUnits(const LayoutDeviceSize& aSize, nscoord aAppUnitsPerDevPixel) {
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return nsSize(NSFloatPixelsToAppUnits(aSize.width, aAppUnitsPerDevPixel),
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NSFloatPixelsToAppUnits(aSize.height, aAppUnitsPerDevPixel));
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}
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static nsRect ToAppUnits(const LayoutDeviceIntRect& aRect, nscoord aAppUnitsPerDevPixel) {
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return nsRect(aRect.x * aAppUnitsPerDevPixel,
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aRect.y * aAppUnitsPerDevPixel,
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aRect.width * aAppUnitsPerDevPixel,
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aRect.height * aAppUnitsPerDevPixel);
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}
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static nsRect ToAppUnits(const LayoutDeviceRect& aRect, nscoord aAppUnitsPerDevPixel) {
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return nsRect(NSFloatPixelsToAppUnits(aRect.x, aAppUnitsPerDevPixel),
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NSFloatPixelsToAppUnits(aRect.y, aAppUnitsPerDevPixel),
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NSFloatPixelsToAppUnits(aRect.width, aAppUnitsPerDevPixel),
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NSFloatPixelsToAppUnits(aRect.height, aAppUnitsPerDevPixel));
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}
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};
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/*
|
|
* 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 nsIPresShell::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 {
|
|
};
|
|
|
|
/*
|
|
* 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 {
|
|
};
|
|
|
|
// 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>
|
|
gfx::PointTyped<dst> operator*(const gfx::PointTyped<src>& aPoint, const gfx::ScaleFactors2D<src, dst>& aScale) {
|
|
return gfx::PointTyped<dst>(aPoint.x * aScale.xScale,
|
|
aPoint.y * aScale.yScale);
|
|
}
|
|
|
|
template<class src, class dst>
|
|
gfx::PointTyped<dst> operator/(const gfx::PointTyped<src>& aPoint, const gfx::ScaleFactors2D<dst, src>& aScale) {
|
|
return gfx::PointTyped<dst>(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>
|
|
gfx::PointTyped<dst> operator*(const gfx::IntPointTyped<src>& aPoint, const gfx::ScaleFactors2D<src, dst>& aScale) {
|
|
return gfx::PointTyped<dst>(float(aPoint.x) * aScale.xScale,
|
|
float(aPoint.y) * aScale.yScale);
|
|
}
|
|
|
|
template<class src, class dst>
|
|
gfx::PointTyped<dst> operator/(const gfx::IntPointTyped<src>& aPoint, const gfx::ScaleFactors2D<dst, src>& aScale) {
|
|
return gfx::PointTyped<dst>(float(aPoint.x) / aScale.xScale,
|
|
float(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>
|
|
gfx::RectTyped<dst> operator*(const gfx::RectTyped<src>& aRect, const gfx::ScaleFactors2D<src, dst>& aScale) {
|
|
return gfx::RectTyped<dst>(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::RectTyped<src>& aRect, const gfx::ScaleFactors2D<dst, src>& aScale) {
|
|
return gfx::RectTyped<dst>(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>
|
|
gfx::RectTyped<dst> operator*(const gfx::IntRectTyped<src>& aRect, const gfx::ScaleFactors2D<src, dst>& aScale) {
|
|
return gfx::RectTyped<dst>(float(aRect.x) * aScale.xScale,
|
|
float(aRect.y) * aScale.yScale,
|
|
float(aRect.width) * aScale.xScale,
|
|
float(aRect.height) * aScale.yScale);
|
|
}
|
|
|
|
template<class src, class dst>
|
|
gfx::RectTyped<dst> operator/(const gfx::IntRectTyped<src>& aRect, const gfx::ScaleFactors2D<dst, src>& aScale) {
|
|
return gfx::RectTyped<dst>(float(aRect.x) / aScale.xScale,
|
|
float(aRect.y) / aScale.yScale,
|
|
float(aRect.width) / aScale.xScale,
|
|
float(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>
|
|
gfx::SizeTyped<dst> operator*(const gfx::SizeTyped<src>& aSize, const gfx::ScaleFactors2D<src, dst>& aScale) {
|
|
return gfx::SizeTyped<dst>(aSize.width * aScale.xScale,
|
|
aSize.height * aScale.yScale);
|
|
}
|
|
|
|
template<class src, class dst>
|
|
gfx::SizeTyped<dst> operator/(const gfx::SizeTyped<src>& aSize, const gfx::ScaleFactors2D<dst, src>& aScale) {
|
|
return gfx::SizeTyped<dst>(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>
|
|
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>
|
|
gfx::SizeTyped<dst> operator*(const gfx::IntSizeTyped<src>& aSize, const gfx::ScaleFactors2D<src, dst>& aScale) {
|
|
return gfx::SizeTyped<dst>(float(aSize.width) * aScale.xScale,
|
|
float(aSize.height) * aScale.yScale);
|
|
}
|
|
|
|
template<class src, class dst>
|
|
gfx::SizeTyped<dst> operator/(const gfx::IntSizeTyped<src>& aSize, const gfx::ScaleFactors2D<dst, src>& aScale) {
|
|
return gfx::SizeTyped<dst>(float(aSize.width) / aScale.xScale,
|
|
float(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>
|
|
gfx::MarginTyped<dst> operator*(const gfx::MarginTyped<src>& aMargin, const gfx::ScaleFactors2D<src, dst>& aScale) {
|
|
return gfx::MarginTyped<dst>(aMargin.top * aScale.yScale,
|
|
aMargin.right * aScale.xScale,
|
|
aMargin.bottom * aScale.yScale,
|
|
aMargin.left * aScale.xScale);
|
|
}
|
|
|
|
template<class src, class dst>
|
|
gfx::MarginTyped<dst> operator/(const gfx::MarginTyped<src>& aMargin, const gfx::ScaleFactors2D<dst, src>& aScale) {
|
|
return gfx::MarginTyped<dst>(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) {
|
|
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) {
|
|
return gfx::ScaleFactor<src, dst>(std::min(aDestSize.width / aSrcSize.width,
|
|
aDestSize.height / aSrcSize.height));
|
|
}
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif
|