LCOV - code coverage report
Current view: directory - layout/base - nsCSSRenderingBorders.h (source / functions) Found Hit Coverage
Test: app.info Lines: 4 0 0.0 %
Date: 2012-06-02 Functions: 4 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : // vim:cindent:ts=2:et:sw=2:
       3                 : /* ***** BEGIN LICENSE BLOCK *****
       4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       5                 :  *
       6                 :  * The contents of this file are subject to the Mozilla Public License Version
       7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       8                 :  * the License. You may obtain a copy of the License at
       9                 :  * http://www.mozilla.org/MPL/
      10                 :  *
      11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      13                 :  * for the specific language governing rights and limitations under the
      14                 :  * License.
      15                 :  *
      16                 :  * The Original Code is mozilla.org code.
      17                 :  *
      18                 :  * The Initial Developer of the Original Code is
      19                 :  *   Mozilla Corporation
      20                 :  * Portions created by the Initial Developer are Copyright (C) 2008
      21                 :  * the Initial Developer. All Rights Reserved.
      22                 :  *
      23                 :  * Contributor(s):
      24                 :  *   Vladimir Vukicevic <vladimir@pobox.com>
      25                 :  *
      26                 :  * Alternatively, the contents of this file may be used under the terms of
      27                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      28                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      30                 :  * of those above. If you wish to allow use of your version of this file only
      31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      32                 :  * use your version of this file under the terms of the MPL, indicate your
      33                 :  * decision by deleting the provisions above and replace them with the notice
      34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      35                 :  * the provisions above, a recipient may use your version of this file under
      36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      37                 :  *
      38                 :  * ***** END LICENSE BLOCK ***** */
      39                 : 
      40                 : #ifndef NS_CSS_RENDERING_BORDERS_H
      41                 : #define NS_CSS_RENDERING_BORDERS_H
      42                 : 
      43                 : #include "nsColor.h"
      44                 : #include "nsStyleStruct.h"
      45                 : 
      46                 : #include "gfxContext.h"
      47                 : 
      48                 : // define this to enable a bunch of debug dump info
      49                 : #undef DEBUG_NEW_BORDERS
      50                 : 
      51                 : //thickness of dashed line relative to dotted line
      52                 : #define DOT_LENGTH  1           //square
      53                 : #define DASH_LENGTH 3           //3 times longer than dot
      54                 : 
      55                 : //some shorthand for side bits
      56                 : #define SIDE_BIT_TOP (1 << NS_SIDE_TOP)
      57                 : #define SIDE_BIT_RIGHT (1 << NS_SIDE_RIGHT)
      58                 : #define SIDE_BIT_BOTTOM (1 << NS_SIDE_BOTTOM)
      59                 : #define SIDE_BIT_LEFT (1 << NS_SIDE_LEFT)
      60                 : #define SIDE_BITS_ALL (SIDE_BIT_TOP|SIDE_BIT_RIGHT|SIDE_BIT_BOTTOM|SIDE_BIT_LEFT)
      61                 : 
      62                 : #define C_TL NS_CORNER_TOP_LEFT
      63                 : #define C_TR NS_CORNER_TOP_RIGHT
      64                 : #define C_BR NS_CORNER_BOTTOM_RIGHT
      65                 : #define C_BL NS_CORNER_BOTTOM_LEFT
      66                 : 
      67                 : /*
      68                 :  * Helper class that handles border rendering.
      69                 :  *
      70                 :  * appUnitsPerPixel -- current value of AUPP
      71                 :  * destContext -- the gfxContext to which the border should be rendered
      72                 :  * outsideRect -- the rectangle on the outer edge of the border
      73                 :  *
      74                 :  * For any parameter where an array of side values is passed in,
      75                 :  * they are in top, right, bottom, left order.
      76                 :  *
      77                 :  * borderStyles -- one border style enum per side
      78                 :  * borderWidths -- one border width per side
      79                 :  * borderRadii -- a gfxCornerSizes struct describing the w/h for each rounded corner.
      80                 :  *    If the corner doesn't have a border radius, 0,0 should be given for it.
      81                 :  * borderColors -- one nscolor per side
      82                 :  * compositeColors -- a pointer to an array of composite color structs, or NULL if none
      83                 :  *
      84                 :  * skipSides -- a bit mask specifying which sides, if any, to skip
      85                 :  * backgroundColor -- the background color of the element.
      86                 :  *    Used in calculating colors for 2-tone borders, such as inset and outset
      87                 :  * gapRect - a rectangle that should be clipped out to leave a gap in a border,
      88                 :  *    or nsnull if none.
      89                 :  */
      90                 : 
      91                 : typedef enum {
      92                 :   BorderColorStyleNone,
      93                 :   BorderColorStyleSolid,
      94                 :   BorderColorStyleLight,
      95                 :   BorderColorStyleDark
      96                 : } BorderColorStyle;
      97                 : 
      98                 : struct nsCSSBorderRenderer {
      99                 :   nsCSSBorderRenderer(PRInt32 aAppUnitsPerPixel,
     100                 :                       gfxContext* aDestContext,
     101                 :                       gfxRect& aOuterRect,
     102                 :                       const PRUint8* aBorderStyles,
     103                 :                       const gfxFloat* aBorderWidths,
     104                 :                       gfxCornerSizes& aBorderRadii,
     105                 :                       const nscolor* aBorderColors,
     106                 :                       nsBorderColors* const* aCompositeColors,
     107                 :                       PRIntn aSkipSides,
     108                 :                       nscolor aBackgroundColor);
     109                 : 
     110                 :   gfxCornerSizes mBorderCornerDimensions;
     111                 : 
     112                 :   // destination context
     113                 :   gfxContext* mContext;
     114                 : 
     115                 :   // the rectangle of the outside and the inside of the border
     116                 :   gfxRect mOuterRect;
     117                 :   gfxRect mInnerRect;
     118                 : 
     119                 :   // the style and size of the border
     120                 :   const PRUint8* mBorderStyles;
     121                 :   const gfxFloat* mBorderWidths;
     122                 :   PRUint8* mSanitizedStyles;
     123                 :   gfxFloat* mSanitizedWidths;
     124                 :   gfxCornerSizes mBorderRadii;
     125                 : 
     126                 :   // colors
     127                 :   const nscolor* mBorderColors;
     128                 :   nsBorderColors* const* mCompositeColors;
     129                 : 
     130                 :   // core app units per pixel
     131                 :   PRInt32 mAUPP;
     132                 : 
     133                 :   // misc -- which sides to skip, the background color
     134                 :   PRIntn mSkipSides;
     135                 :   nscolor mBackgroundColor;
     136                 : 
     137                 :   // calculated values
     138                 :   bool mOneUnitBorder;
     139                 :   bool mNoBorderRadius;
     140                 :   bool mAvoidStroke;
     141                 : 
     142                 :   // For all the sides in the bitmask, would they be rendered
     143                 :   // in an identical color and style?
     144                 :   bool AreBorderSideFinalStylesSame(PRUint8 aSides);
     145                 : 
     146                 :   // For the given style, is the given corner a solid color?
     147                 :   bool IsSolidCornerStyle(PRUint8 aStyle, mozilla::css::Corner aCorner);
     148                 : 
     149                 :   // For the given solid corner, what color style should be used?
     150                 :   BorderColorStyle BorderColorStyleForSolidCorner(PRUint8 aStyle, mozilla::css::Corner aCorner);
     151                 : 
     152                 :   //
     153                 :   // Path generation functions
     154                 :   //
     155                 : 
     156                 :   // add the path for drawing the given corner to the context
     157                 :   void DoCornerSubPath(mozilla::css::Corner aCorner);
     158                 :   // add the path for drawing the given side without any adjacent corners to the context
     159                 :   void DoSideClipWithoutCornersSubPath(mozilla::css::Side aSide);
     160                 : 
     161                 :   // Create a clip path for the wedge that this side of
     162                 :   // the border should take up.  This is only called
     163                 :   // when we're drawing separate border sides, so we know
     164                 :   // that ADD compositing is taking place.
     165                 :   //
     166                 :   // This code needs to make sure that the individual pieces
     167                 :   // don't ever (mathematically) overlap; the pixel overlap
     168                 :   // is taken care of by the ADD compositing.
     169                 :   void DoSideClipSubPath(mozilla::css::Side aSide);
     170                 : 
     171                 :   // Given a set of sides to fill and a color, do so in the fastest way.
     172                 :   //
     173                 :   // Stroke tends to be faster for smaller borders because it doesn't go
     174                 :   // through the tessellator, which has initialization overhead.  If
     175                 :   // we're rendering all sides, we can use stroke at any thickness; we
     176                 :   // also do TL/BR pairs at 1px thickness using stroke.
     177                 :   //
     178                 :   // If we can't stroke, then if it's a TL/BR pair, we use the specific
     179                 :   // TL/BR paths.  Otherwise, we do the full path and fill.
     180                 :   //
     181                 :   // Calling code is expected to only set up a clip as necessary; no
     182                 :   // clip is needed if we can render the entire border in 1 or 2 passes.
     183                 :   void FillSolidBorder(const gfxRect& aOuterRect,
     184                 :                        const gfxRect& aInnerRect,
     185                 :                        const gfxCornerSizes& aBorderRadii,
     186                 :                        const gfxFloat *aBorderSizes,
     187                 :                        PRIntn aSides,
     188                 :                        const gfxRGBA& aColor);
     189                 : 
     190                 :   //
     191                 :   // core rendering
     192                 :   //
     193                 : 
     194                 :   // draw the border for the given sides, using the style of the first side
     195                 :   // present in the bitmask
     196                 :   void DrawBorderSides (PRIntn aSides);
     197                 : 
     198                 :   // function used by the above to handle -moz-border-colors
     199                 :   void DrawBorderSidesCompositeColors(PRIntn aSides, const nsBorderColors *compositeColors);
     200                 : 
     201                 :   // draw the given dashed side
     202                 :   void DrawDashedSide (mozilla::css::Side aSide);
     203                 :   
     204                 :   // Setup the stroke style for a given side
     205                 :   void SetupStrokeStyle(mozilla::css::Side aSize);
     206                 : 
     207                 :   // Analyze if all border sides have the same width.
     208                 :   bool AllBordersSameWidth();
     209                 : 
     210                 :   // Analyze if all borders are 'solid' this also considers hidden or 'none'
     211                 :   // borders because they can be considered 'solid' borders of 0 width and
     212                 :   // with no color effect.
     213                 :   bool AllBordersSolid(bool *aHasCompositeColors);
     214                 : 
     215                 :   // Create a gradient pattern that will handle the color transition for a
     216                 :   // corner.
     217                 :   already_AddRefed<gfxPattern> CreateCornerGradient(mozilla::css::Corner aCorner,
     218                 :                                                     const gfxRGBA &aFirstColor,
     219                 :                                                     const gfxRGBA &aSecondColor);
     220                 : 
     221                 :   // Draw a solid color border that is uniformly the same width.
     222                 :   void DrawSingleWidthSolidBorder();
     223                 : 
     224                 :   // Draw any border which is solid on all sides and does not use
     225                 :   // CompositeColors.
     226                 :   void DrawNoCompositeColorSolidBorder();
     227                 : 
     228                 :   // Draw a solid border that has no border radius (i.e. is rectangular) and
     229                 :   // uses CompositeColors.
     230                 :   void DrawRectangularCompositeColors();
     231                 : 
     232                 :   // draw the entire border
     233                 :   void DrawBorders ();
     234                 : 
     235                 :   // utility function used for background painting as well as borders
     236                 :   static void ComputeInnerRadii(const gfxCornerSizes& aRadii,
     237                 :                                 const gfxFloat *aBorderSizes,
     238                 :                                 gfxCornerSizes *aInnerRadiiRet);
     239                 : };
     240                 : 
     241                 : #ifdef DEBUG_NEW_BORDERS
     242                 : #include <stdarg.h>
     243                 : 
     244                 : static inline void S(const gfxPoint& p) {
     245                 :   fprintf (stderr, "[%f,%f]", p.x, p.y);
     246                 : }
     247                 : 
     248                 : static inline void S(const gfxSize& s) {
     249                 :   fprintf (stderr, "[%f %f]", s.width, s.height);
     250                 : }
     251                 : 
     252                 : static inline void S(const gfxRect& r) {
     253                 :   fprintf (stderr, "[%f %f %f %f]", r.pos.x, r.pos.y, r.size.width, r.size.height);
     254                 : }
     255                 : 
     256                 : static inline void S(const gfxFloat f) {
     257                 :   fprintf (stderr, "%f", f);
     258                 : }
     259                 : 
     260                 : static inline void S(const char *s) {
     261                 :   fprintf (stderr, "%s", s);
     262                 : }
     263                 : 
     264                 : static inline void SN(const char *s = nsnull) {
     265                 :   if (s)
     266                 :     fprintf (stderr, "%s", s);
     267                 :   fprintf (stderr, "\n");
     268                 :   fflush (stderr);
     269                 : }
     270                 : 
     271                 : static inline void SF(const char *fmt, ...) {
     272                 :   va_list vl;
     273                 :   va_start(vl, fmt);
     274                 :   vfprintf (stderr, fmt, vl);
     275                 :   va_end(vl);
     276                 : }
     277                 : 
     278                 : static inline void SX(gfxContext *ctx) {
     279                 :   gfxPoint p = ctx->CurrentPoint();
     280                 :   fprintf (stderr, "p: %f %f\n", p.x, p.y);
     281                 :   return;
     282                 :   ctx->MoveTo(p + gfxPoint(-2, -2)); ctx->LineTo(p + gfxPoint(2, 2));
     283                 :   ctx->MoveTo(p + gfxPoint(-2, 2)); ctx->LineTo(p + gfxPoint(2, -2));
     284                 :   ctx->MoveTo(p);
     285                 : }
     286                 : 
     287                 : 
     288                 : #else
     289                 : static inline void S(const gfxPoint& p) {}
     290                 : static inline void S(const gfxSize& s) {}
     291               0 : static inline void S(const gfxRect& r) {}
     292                 : static inline void S(const gfxFloat f) {}
     293               0 : static inline void S(const char *s) {}
     294               0 : static inline void SN(const char *s = nsnull) {}
     295               0 : static inline void SF(const char *fmt, ...) {}
     296                 : static inline void SX(gfxContext *ctx) {}
     297                 : #endif
     298                 : 
     299                 : #endif /* NS_CSS_RENDERING_BORDERS_H */

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