The Tor Browser: layout/base/nsCSSRenderingBorders.h@b8a032363ba2 (annotated)

layout/base/nsCSSRenderingBorders.h@b8a032363ba2 (annotated)

layout/base/nsCSSRenderingBorders.h

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 // vim:cindent:ts=2:et:sw=2:
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #ifndef NS_CSS_RENDERING_BORDERS_H
 #define NS_CSS_RENDERING_BORDERS_H
 #include "nsColor.h"
 class gfxContext;
 class gfxPattern;
 struct gfxRGBA;
 namespace mozilla {
 namespace gfx {
 class GradientStops;
 }
 }
 // define this to enable a bunch of debug dump info
 #undef DEBUG_NEW_BORDERS
 //thickness of dashed line relative to dotted line
 #define DOT_LENGTH  1           //square
 #define DASH_LENGTH 3           //3 times longer than dot
 //some shorthand for side bits
 #define SIDE_BIT_TOP (1 << NS_SIDE_TOP)
 #define SIDE_BIT_RIGHT (1 << NS_SIDE_RIGHT)
 #define SIDE_BIT_BOTTOM (1 << NS_SIDE_BOTTOM)
 #define SIDE_BIT_LEFT (1 << NS_SIDE_LEFT)
 #define SIDE_BITS_ALL (SIDE_BIT_TOP|SIDE_BIT_RIGHT|SIDE_BIT_BOTTOM|SIDE_BIT_LEFT)
 #define C_TL NS_CORNER_TOP_LEFT
 #define C_TR NS_CORNER_TOP_RIGHT
 #define C_BR NS_CORNER_BOTTOM_RIGHT
 #define C_BL NS_CORNER_BOTTOM_LEFT
 /*
  * Helper class that handles border rendering.
  *
  * appUnitsPerPixel -- current value of AUPP
  * destContext -- the gfxContext to which the border should be rendered
  * outsideRect -- the rectangle on the outer edge of the border
  *
  * For any parameter where an array of side values is passed in,
  * they are in top, right, bottom, left order.
  *
  * borderStyles -- one border style enum per side
  * borderWidths -- one border width per side
  * borderRadii -- a gfxCornerSizes struct describing the w/h for each rounded corner.
  *    If the corner doesn't have a border radius, 0,0 should be given for it.
  * borderColors -- one nscolor per side
  * compositeColors -- a pointer to an array of composite color structs, or
  *    nullptr if none.
  *
  * skipSides -- a bit mask specifying which sides, if any, to skip
  * backgroundColor -- the background color of the element.
  *    Used in calculating colors for 2-tone borders, such as inset and outset
  * gapRect - a rectangle that should be clipped out to leave a gap in a border,
  *    or nullptr if none.
  */
 typedef enum {
   BorderColorStyleNone,
   BorderColorStyleSolid,
   BorderColorStyleLight,
   BorderColorStyleDark
 } BorderColorStyle;
 struct nsCSSBorderRenderer {
   nsCSSBorderRenderer(int32_t aAppUnitsPerPixel,
                       gfxContext* aDestContext,
                       gfxRect& aOuterRect,
                       const uint8_t* aBorderStyles,
                       const gfxFloat* aBorderWidths,
                       gfxCornerSizes& aBorderRadii,
                       const nscolor* aBorderColors,
                       nsBorderColors* const* aCompositeColors,
                       int aSkipSides,
                       nscolor aBackgroundColor);
   gfxCornerSizes mBorderCornerDimensions;
   // destination context
   gfxContext* mContext;
   // the rectangle of the outside and the inside of the border
   gfxRect mOuterRect;
   gfxRect mInnerRect;
   // the style and size of the border
   const uint8_t* mBorderStyles;
   const gfxFloat* mBorderWidths;
   uint8_t* mSanitizedStyles;
   gfxFloat* mSanitizedWidths;
   gfxCornerSizes mBorderRadii;
   // colors
   const nscolor* mBorderColors;
   nsBorderColors* const* mCompositeColors;
   // core app units per pixel
   int32_t mAUPP;
   // misc -- which sides to skip, the background color
   int mSkipSides;
   nscolor mBackgroundColor;
   // calculated values
   bool mOneUnitBorder;
   bool mNoBorderRadius;
   bool mAvoidStroke;
   // For all the sides in the bitmask, would they be rendered
   // in an identical color and style?
   bool AreBorderSideFinalStylesSame(uint8_t aSides);
   // For the given style, is the given corner a solid color?
   bool IsSolidCornerStyle(uint8_t aStyle, mozilla::css::Corner aCorner);
   // For the given solid corner, what color style should be used?
   BorderColorStyle BorderColorStyleForSolidCorner(uint8_t aStyle, mozilla::css::Corner aCorner);
   //
   // Path generation functions
   //
   // add the path for drawing the given corner to the context
   void DoCornerSubPath(mozilla::css::Corner aCorner);
   // add the path for drawing the given side without any adjacent corners to the context
   void DoSideClipWithoutCornersSubPath(mozilla::css::Side aSide);
   // Create a clip path for the wedge that this side of
   // the border should take up.  This is only called
   // when we're drawing separate border sides, so we know
   // that ADD compositing is taking place.
   //
   // This code needs to make sure that the individual pieces
   // don't ever (mathematically) overlap; the pixel overlap
   // is taken care of by the ADD compositing.
   void DoSideClipSubPath(mozilla::css::Side aSide);
   // Given a set of sides to fill and a color, do so in the fastest way.
   //
   // Stroke tends to be faster for smaller borders because it doesn't go
   // through the tessellator, which has initialization overhead.  If
   // we're rendering all sides, we can use stroke at any thickness; we
   // also do TL/BR pairs at 1px thickness using stroke.
   //
   // If we can't stroke, then if it's a TL/BR pair, we use the specific
   // TL/BR paths.  Otherwise, we do the full path and fill.
   //
   // Calling code is expected to only set up a clip as necessary; no
   // clip is needed if we can render the entire border in 1 or 2 passes.
   void FillSolidBorder(const gfxRect& aOuterRect,
                        const gfxRect& aInnerRect,
                        const gfxCornerSizes& aBorderRadii,
                        const gfxFloat *aBorderSizes,
                        int aSides,
                        const gfxRGBA& aColor);
   //
   // core rendering
   //
   // draw the border for the given sides, using the style of the first side
   // present in the bitmask
   void DrawBorderSides (int aSides);
   // function used by the above to handle -moz-border-colors
   void DrawBorderSidesCompositeColors(int aSides, const nsBorderColors *compositeColors);
   // draw the given dashed side
   void DrawDashedSide (mozilla::css::Side aSide);
   // Setup the stroke style for a given side
   void SetupStrokeStyle(mozilla::css::Side aSize);
   // Analyze if all border sides have the same width.
   bool AllBordersSameWidth();
   // Analyze if all borders are 'solid' this also considers hidden or 'none'
   // borders because they can be considered 'solid' borders of 0 width and
   // with no color effect.
   bool AllBordersSolid(bool *aHasCompositeColors);
   // Create a gradient pattern that will handle the color transition for a
   // corner.
   already_AddRefed<gfxPattern> CreateCornerGradient(mozilla::css::Corner aCorner,
                                                     const gfxRGBA &aFirstColor,
                                                     const gfxRGBA &aSecondColor);
   // Azure variant of CreateCornerGradient.
   mozilla::TemporaryRef<mozilla::gfx::GradientStops>
   CreateCornerGradient(mozilla::css::Corner aCorner, const gfxRGBA &aFirstColor,
                        const gfxRGBA &aSecondColor, mozilla::gfx::DrawTarget *aDT,
                        mozilla::gfx::Point &aPoint1, mozilla::gfx::Point &aPoint2);
   // Draw a solid color border that is uniformly the same width.
   void DrawSingleWidthSolidBorder();
   // Draw any border which is solid on all sides and does not use
   // CompositeColors.
   void DrawNoCompositeColorSolidBorder();
   // Draw any border which is solid on all sides and does not use
   // CompositeColors. Using Azure.
   void DrawNoCompositeColorSolidBorderAzure();
   // Draw a solid border that has no border radius (i.e. is rectangular) and
   // uses CompositeColors.
   void DrawRectangularCompositeColors();
   // draw the entire border
   void DrawBorders ();
   // utility function used for background painting as well as borders
   static void ComputeInnerRadii(const gfxCornerSizes& aRadii,
                                 const gfxFloat *aBorderSizes,
                                 gfxCornerSizes *aInnerRadiiRet);
   // Given aRadii as the border radii for a rectangle, compute the
   // appropriate radii for another rectangle *outside* that rectangle
   // by increasing the radii, except keeping sharp corners sharp.
   // Used for spread box-shadows
   static void ComputeOuterRadii(const gfxCornerSizes& aRadii,
                                 const gfxFloat *aBorderSizes,
                                 gfxCornerSizes *aOuterRadiiRet);
 };
 namespace mozilla {
 #ifdef DEBUG_NEW_BORDERS
 #include <stdarg.h>
 static inline void S(const gfxPoint& p) {
   fprintf (stderr, "[%f,%f]", p.x, p.y);
 }
 static inline void S(const gfxSize& s) {
   fprintf (stderr, "[%f %f]", s.width, s.height);
 }
 static inline void S(const gfxRect& r) {
   fprintf (stderr, "[%f %f %f %f]", r.pos.x, r.pos.y, r.size.width, r.size.height);
 }
 static inline void S(const gfxFloat f) {
   fprintf (stderr, "%f", f);
 }
 static inline void S(const char *s) {
   fprintf (stderr, "%s", s);
 }
 static inline void SN(const char *s = nullptr) {
   if (s)
     fprintf (stderr, "%s", s);
   fprintf (stderr, "\n");
   fflush (stderr);
 }
 static inline void SF(const char *fmt, ...) {
   va_list vl;
   va_start(vl, fmt);
   vfprintf (stderr, fmt, vl);
   va_end(vl);
 }
 static inline void SX(gfxContext *ctx) {
   gfxPoint p = ctx->CurrentPoint();
   fprintf (stderr, "p: %f %f\n", p.x, p.y);
   return;
   ctx->MoveTo(p + gfxPoint(-2, -2)); ctx->LineTo(p + gfxPoint(2, 2));
   ctx->MoveTo(p + gfxPoint(-2, 2)); ctx->LineTo(p + gfxPoint(2, -2));
   ctx->MoveTo(p);
 }
 #else
 static inline void S(const gfxPoint& p) {}
 static inline void S(const gfxSize& s) {}
 static inline void S(const gfxRect& r) {}
 static inline void S(const gfxFloat f) {}
 static inline void S(const char *s) {}
 static inline void SN(const char *s = nullptr) {}
 static inline void SF(const char *fmt, ...) {}
 static inline void SX(gfxContext *ctx) {}
 #endif
 }
 #endif /* NS_CSS_RENDERING_BORDERS_H */

The Tor Browser / annotate

layout/base/nsCSSRenderingBorders.h@b8a032363ba2 (annotated)

layout/base/nsCSSRenderingBorders.h