mirror of
https://github.com/mozilla/gecko-dev.git
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380 lines
13 KiB
C++
380 lines
13 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 NS_CSS_RENDERING_BORDERS_H
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#define NS_CSS_RENDERING_BORDERS_H
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#include "gfxRect.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/BezierUtils.h"
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#include "mozilla/gfx/PathHelpers.h"
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#include "mozilla/RefPtr.h"
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#include "nsColor.h"
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#include "nsCOMPtr.h"
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#include "nsIFrame.h"
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#include "nsImageRenderer.h"
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#include "nsStyleConsts.h"
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#include "nsStyleStruct.h"
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#include "nsPresContext.h"
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#include "gfxUtils.h"
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struct nsBorderColors;
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class nsDisplayBorder;
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namespace mozilla {
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namespace gfx {
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class GradientStops;
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} // namespace gfx
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namespace layers {
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class StackingContextHelper;
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} // namespace layers
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} // namespace mozilla
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// define this to enable a bunch of debug dump info
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#undef DEBUG_NEW_BORDERS
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/*
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* Helper class that handles border rendering.
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*
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* aDrawTarget -- the DrawTarget to which the border should be rendered
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* outsideRect -- the rectangle on the outer edge of the border
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*
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* For any parameter where an array of side values is passed in,
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* they are in top, right, bottom, left order.
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*
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* borderStyles -- one border style enum per side
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* borderWidths -- one border width per side
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* borderRadii -- a RectCornerRadii struct describing the w/h for each rounded corner.
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* If the corner doesn't have a border radius, 0,0 should be given for it.
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* borderColors -- one nscolor per side
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*
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* skipSides -- a bit mask specifying which sides, if any, to skip
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* backgroundColor -- the background color of the element.
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* Used in calculating colors for 2-tone borders, such as inset and outset
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* gapRect - a rectangle that should be clipped out to leave a gap in a border,
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* or nullptr if none.
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*/
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typedef enum {
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BorderColorStyleNone,
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BorderColorStyleSolid,
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BorderColorStyleLight,
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BorderColorStyleDark
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} BorderColorStyle;
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class nsIDocument;
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class nsPresContext;
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class nsCSSBorderRenderer final
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{
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typedef mozilla::gfx::Bezier Bezier;
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typedef mozilla::gfx::ColorPattern ColorPattern;
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typedef mozilla::gfx::DrawTarget DrawTarget;
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typedef mozilla::gfx::Float Float;
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typedef mozilla::gfx::Path Path;
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typedef mozilla::gfx::Point Point;
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typedef mozilla::gfx::Rect Rect;
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typedef mozilla::gfx::RectCornerRadii RectCornerRadii;
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typedef mozilla::gfx::StrokeOptions StrokeOptions;
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friend class nsDisplayBorder;
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friend class nsDisplayOutline;
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friend class nsDisplayButtonBorder;
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friend class nsDisplayButtonForeground;
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public:
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nsCSSBorderRenderer(nsPresContext* aPresContext,
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const nsIDocument* aDocument,
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DrawTarget* aDrawTarget,
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const Rect& aDirtyRect,
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Rect& aOuterRect,
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const uint8_t* aBorderStyles,
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const Float* aBorderWidths,
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RectCornerRadii& aBorderRadii,
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const nscolor* aBorderColors,
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nscolor aBackgroundColor,
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bool aBackfaceIsVisible,
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const mozilla::Maybe<Rect>& aClipRect);
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// draw the entire border
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void DrawBorders();
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void CreateWebRenderCommands(nsDisplayItem* aItem,
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mozilla::wr::DisplayListBuilder& aBuilder,
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mozilla::wr::IpcResourceUpdateQueue& aResources,
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const mozilla::layers::StackingContextHelper& aSc);
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// utility function used for background painting as well as borders
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static void ComputeInnerRadii(const RectCornerRadii& aRadii,
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const Float* aBorderSizes,
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RectCornerRadii* aInnerRadiiRet);
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// Given aRadii as the border radii for a rectangle, compute the
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// appropriate radii for another rectangle *outside* that rectangle
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// by increasing the radii, except keeping sharp corners sharp.
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// Used for spread box-shadows
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static void ComputeOuterRadii(const RectCornerRadii& aRadii,
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const Float* aBorderSizes,
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RectCornerRadii* aOuterRadiiRet);
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static bool AllCornersZeroSize(const RectCornerRadii& corners);
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private:
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RectCornerRadii mBorderCornerDimensions;
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// Target document to report warning
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nsPresContext* mPresContext;
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const nsIDocument* mDocument;
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// destination DrawTarget and dirty rect
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DrawTarget* mDrawTarget;
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Rect mDirtyRect;
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// the rectangle of the outside and the inside of the border
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Rect mOuterRect;
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Rect mInnerRect;
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// the style and size of the border
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uint8_t mBorderStyles[4];
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Float mBorderWidths[4];
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RectCornerRadii mBorderRadii;
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// the colors for 'border-top-color' et. al.
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nscolor mBorderColors[4];
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// the background color
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nscolor mBackgroundColor;
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// calculated values
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bool mAllBordersSameStyle;
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bool mAllBordersSameWidth;
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bool mOneUnitBorder;
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bool mNoBorderRadius;
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bool mAvoidStroke;
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bool mBackfaceIsVisible;
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mozilla::Maybe<Rect> mLocalClip;
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// For all the sides in the bitmask, would they be rendered
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// in an identical color and style?
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bool AreBorderSideFinalStylesSame(uint8_t aSides);
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// For the given style, is the given corner a solid color?
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bool IsSolidCornerStyle(uint8_t aStyle, mozilla::Corner aCorner);
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// For the given corner, is the given corner mergeable into one dot?
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bool IsCornerMergeable(mozilla::Corner aCorner);
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// For the given solid corner, what color style should be used?
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BorderColorStyle BorderColorStyleForSolidCorner(uint8_t aStyle, mozilla::Corner aCorner);
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//
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// Path generation functions
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//
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// Get the Rect for drawing the given corner
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Rect GetCornerRect(mozilla::Corner aCorner);
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// add the path for drawing the given side without any adjacent corners to the context
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Rect GetSideClipWithoutCornersRect(mozilla::Side aSide);
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// Create a clip path for the wedge that this side of
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// the border should take up. This is only called
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// when we're drawing separate border sides, so we know
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// that ADD compositing is taking place.
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//
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// This code needs to make sure that the individual pieces
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// don't ever (mathematically) overlap; the pixel overlap
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// is taken care of by the ADD compositing.
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already_AddRefed<Path> GetSideClipSubPath(mozilla::Side aSide);
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// Return start or end point for dashed/dotted side
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Point GetStraightBorderPoint(mozilla::Side aSide,
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mozilla::Corner aCorner,
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bool* aIsUnfilled,
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Float aDotOffset = 0.0f);
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// Return bezier control points for the outer and the inner curve for given
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// corner
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void GetOuterAndInnerBezier(Bezier* aOuterBezier,
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Bezier* aInnerBezier,
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mozilla::Corner aCorner);
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// Given a set of sides to fill and a color, do so in the fastest way.
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//
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// Stroke tends to be faster for smaller borders because it doesn't go
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// through the tessellator, which has initialization overhead. If
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// we're rendering all sides, we can use stroke at any thickness; we
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// also do TL/BR pairs at 1px thickness using stroke.
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//
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// If we can't stroke, then if it's a TL/BR pair, we use the specific
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// TL/BR paths. Otherwise, we do the full path and fill.
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//
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// Calling code is expected to only set up a clip as necessary; no
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// clip is needed if we can render the entire border in 1 or 2 passes.
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void FillSolidBorder(const Rect& aOuterRect,
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const Rect& aInnerRect,
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const RectCornerRadii& aBorderRadii,
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const Float* aBorderSizes,
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int aSides,
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const ColorPattern& aColor);
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//
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// core rendering
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//
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// draw the border for the given sides, using the style of the first side
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// present in the bitmask
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void DrawBorderSides (int aSides);
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// Setup the stroke options for the given dashed/dotted side
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void SetupDashedOptions(StrokeOptions* aStrokeOptions,
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Float aDash[2], mozilla::Side aSide,
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Float aBorderLength, bool isCorner);
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// Draw the given dashed/dotte side
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void DrawDashedOrDottedSide(mozilla::Side aSide);
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// Draw the given dotted side, each dot separately
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void DrawDottedSideSlow(mozilla::Side aSide);
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// Draw the given dashed/dotted corner
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void DrawDashedOrDottedCorner(mozilla::Side aSide,
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mozilla::Corner aCorner);
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// Draw the given dotted corner, each segment separately
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void DrawDottedCornerSlow(mozilla::Side aSide,
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mozilla::Corner aCorner);
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// Draw the given dashed corner, each dot separately
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void DrawDashedCornerSlow(mozilla::Side aSide,
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mozilla::Corner aCorner);
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// Draw the given dashed/dotted corner with solid style
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void DrawFallbackSolidCorner(mozilla::Side aSide,
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mozilla::Corner aCorner);
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// Analyze if all border sides have the same width.
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bool AllBordersSameWidth();
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// Analyze if all borders are 'solid' this also considers hidden or 'none'
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// borders because they can be considered 'solid' borders of 0 width and
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// with no color effect.
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bool AllBordersSolid();
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// Draw a solid color border that is uniformly the same width.
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void DrawSingleWidthSolidBorder();
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// Draw any border which is solid on all sides.
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void DrawSolidBorder();
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};
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class nsCSSBorderImageRenderer final
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{
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typedef mozilla::nsImageRenderer nsImageRenderer;
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public:
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static mozilla::Maybe<nsCSSBorderImageRenderer>
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CreateBorderImageRenderer(nsPresContext* aPresContext,
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nsIFrame* aForFrame,
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const nsRect& aBorderArea,
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const nsStyleBorder& aStyleBorder,
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const nsRect& aDirtyRect,
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nsIFrame::Sides aSkipSides,
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uint32_t aFlags,
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mozilla::image::ImgDrawResult* aDrawResult);
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mozilla::image::ImgDrawResult
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DrawBorderImage(nsPresContext* aPresContext,
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gfxContext& aRenderingContext,
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nsIFrame* aForFrame,
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const nsRect& aDirtyRect);
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void
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CreateWebRenderCommands(nsDisplayItem* aItem,
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nsIFrame* aForFrame,
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mozilla::wr::DisplayListBuilder& aBuilder,
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mozilla::wr::IpcResourceUpdateQueue& aResources,
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const mozilla::layers::StackingContextHelper& aSc,
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mozilla::layers::WebRenderLayerManager* aManager,
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nsDisplayListBuilder* aDisplayListBuilder);
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nsCSSBorderImageRenderer(const nsCSSBorderImageRenderer& aRhs);
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nsCSSBorderImageRenderer& operator=(const nsCSSBorderImageRenderer& aRhs);
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private:
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nsCSSBorderImageRenderer(nsIFrame* aForFrame,
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const nsRect& aBorderArea,
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const nsStyleBorder& aStyleBorder,
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nsIFrame::Sides aSkipSides,
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const nsImageRenderer& aImageRenderer);
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nsImageRenderer mImageRenderer;
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nsSize mImageSize;
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nsMargin mSlice;
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nsMargin mWidths;
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nsMargin mImageOutset;
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nsRect mArea;
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nsRect mClip;
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mozilla::StyleBorderImageRepeat mRepeatModeHorizontal;
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mozilla::StyleBorderImageRepeat mRepeatModeVertical;
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uint8_t mFill;
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friend class nsDisplayBorder;
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friend struct nsCSSRendering;
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};
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namespace mozilla {
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#ifdef DEBUG_NEW_BORDERS
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#include <stdarg.h>
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static inline void PrintAsString(const mozilla::gfx::Point& p) {
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fprintf (stderr, "[%f,%f]", p.x, p.y);
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}
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static inline void PrintAsString(const mozilla::gfx::Size& s) {
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fprintf (stderr, "[%f %f]", s.width, s.height);
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}
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static inline void PrintAsString(const mozilla::gfx::Rect& r) {
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fprintf (stderr, "[%f %f %f %f]", r.X(), r.Y(), r.Width(), r.Height());
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}
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static inline void PrintAsString(const mozilla::gfx::Float f) {
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fprintf (stderr, "%f", f);
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}
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static inline void PrintAsString(const char *s) {
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fprintf (stderr, "%s", s);
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}
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static inline void PrintAsStringNewline(const char *s = nullptr) {
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if (s)
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fprintf (stderr, "%s", s);
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fprintf (stderr, "\n");
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fflush (stderr);
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}
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static inline MOZ_FORMAT_PRINTF(1, 2) void PrintAsFormatString(const char *fmt, ...) {
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va_list vl;
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va_start(vl, fmt);
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vfprintf (stderr, fmt, vl);
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va_end(vl);
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}
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#else
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static inline void PrintAsString(const mozilla::gfx::Point& p) {}
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static inline void PrintAsString(const mozilla::gfx::Size& s) {}
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static inline void PrintAsString(const mozilla::gfx::Rect& r) {}
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static inline void PrintAsString(const mozilla::gfx::Float f) {}
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static inline void PrintAsString(const char *s) {}
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static inline void PrintAsStringNewline(const char *s = nullptr) {}
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static inline MOZ_FORMAT_PRINTF(1, 2) void PrintAsFormatString(const char *fmt, ...) {}
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#endif
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} // namespace mozilla
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#endif /* NS_CSS_RENDERING_BORDERS_H */
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