some utils for rect and matrix

src/core/SkScan_Hairline.cpp

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkScan.h"
@@ skipping 249 matching lines @@
 static void hair_path(const SkPath& path, const SkRasterClip& rclip,
                       SkBlitter* blitter, LineProc lineproc) {
     if (path.isEmpty()) {
         return;
     }
 
     SkAAClipBlitterWrapper wrap;
     const SkRegion* clip = NULL;
 
     {
-        SkIRect ibounds;
-        path.getBounds().roundOut(&ibounds);
-        ibounds.inset(-1, -1);
+        const SkIRect ibounds = path.getBounds().roundOut().makeOutset(1, 1);
 
         if (rclip.quickReject(ibounds)) {
             return;
         }
         if (!rclip.quickContains(ibounds)) {
             if (rclip.isBW()) {
                 clip = &rclip.bwRgn();
             } else {
                 wrap.init(rclip, blitter);
                 blitter = wrap.getBlitter();
@@ skipping 89 matching lines @@
 
 void SkScan::HairLine(const SkPoint& p0, const SkPoint& p1,
                       const SkRasterClip& clip, SkBlitter* blitter) {
     if (clip.isBW()) {
         HairLineRgn(p0, p1, &clip.bwRgn(), blitter);
     } else {
         const SkRegion* clipRgn = NULL;
         SkRect r;
         r.set(p0.fX, p0.fY, p1.fX, p1.fY);
         r.sort();
-        r.inset(-SK_ScalarHalf, -SK_ScalarHalf);
+        r.outset(SK_ScalarHalf, SK_ScalarHalf);
 
         SkAAClipBlitterWrapper wrap;
         if (!clip.quickContains(r.roundOut())) {
             wrap.init(clip, blitter);
             blitter = wrap.getBlitter();
             clipRgn = &wrap.getRgn();
         }
         HairLineRgn(p0, p1, clipRgn, blitter);
     }
 }
 
 void SkScan::AntiHairLine(const SkPoint& p0, const SkPoint& p1,
                           const SkRasterClip& clip, SkBlitter* blitter) {
     if (clip.isBW()) {
         AntiHairLineRgn(p0, p1, &clip.bwRgn(), blitter);
     } else {
         const SkRegion* clipRgn = NULL;
         SkRect r;
-        SkIRect ir;
         r.set(p0.fX, p0.fY, p1.fX, p1.fY);
         r.sort();
-        r.roundOut(&ir);
-        ir.inset(-1, -1);
 
         SkAAClipBlitterWrapper wrap;
-        if (!clip.quickContains(ir)) {
+        if (!clip.quickContains(r.roundOut().makeOutset(1, 1))) {
             wrap.init(clip, blitter);
             blitter = wrap.getBlitter();
             clipRgn = &wrap.getRgn();
         }
         AntiHairLineRgn(p0, p1, clipRgn, blitter);
     }
 }