1
2 /*
3 * Copyright 2011 The Android Open Source Project
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9
10 #ifndef SkScan_DEFINED
11 #define SkScan_DEFINED
12
13 #include "SkRect.h"
14
15 class SkRasterClip;
16 class SkRegion;
17 class SkBlitter;
18 class SkPath;
19
20 /** Defines a fixed-point rectangle, identical to the integer SkIRect, but its
21 coordinates are treated as SkFixed rather than int32_t.
22 */
23 typedef SkIRect SkXRect;
24
25 class SkScan {
26 public:
27 static void FillPath(const SkPath&, const SkIRect&, SkBlitter*);
28
29 ///////////////////////////////////////////////////////////////////////////
30 // rasterclip
31
32 static void FillIRect(const SkIRect&, const SkRasterClip&, SkBlitter*);
33 static void FillXRect(const SkXRect&, const SkRasterClip&, SkBlitter*);
34 #ifdef SK_SCALAR_IS_FIXED
FillRect(const SkRect & rect,const SkRasterClip & clip,SkBlitter * blitter)35 static void FillRect(const SkRect& rect, const SkRasterClip& clip,
36 SkBlitter* blitter) {
37 SkScan::FillXRect(*(const SkXRect*)&rect, clip, blitter);
38 }
AntiFillRect(const SkRect & rect,const SkRasterClip & clip,SkBlitter * blitter)39 static void AntiFillRect(const SkRect& rect, const SkRasterClip& clip,
40 SkBlitter* blitter) {
41 SkScan::AntiFillXRect(*(const SkXRect*)&rect, clip, blitter);
42 }
43 #else
44 static void FillRect(const SkRect&, const SkRasterClip&, SkBlitter*);
45 static void AntiFillRect(const SkRect&, const SkRasterClip&, SkBlitter*);
46 #endif
47 static void AntiFillXRect(const SkXRect&, const SkRasterClip&, SkBlitter*);
48 static void FillPath(const SkPath&, const SkRasterClip&, SkBlitter*);
49 static void AntiFillPath(const SkPath&, const SkRasterClip&, SkBlitter*);
50 static void FrameRect(const SkRect&, const SkPoint& strokeSize,
51 const SkRasterClip&, SkBlitter*);
52 static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize,
53 const SkRasterClip&, SkBlitter*);
54 static void FillTriangle(const SkPoint pts[], const SkRasterClip&, SkBlitter*);
55 static void HairLine(const SkPoint&, const SkPoint&, const SkRasterClip&,
56 SkBlitter*);
57 static void AntiHairLine(const SkPoint&, const SkPoint&, const SkRasterClip&,
58 SkBlitter*);
59 static void HairRect(const SkRect&, const SkRasterClip&, SkBlitter*);
60 static void AntiHairRect(const SkRect&, const SkRasterClip&, SkBlitter*);
61 static void HairPath(const SkPath&, const SkRasterClip&, SkBlitter*);
62 static void AntiHairPath(const SkPath&, const SkRasterClip&, SkBlitter*);
63
64 private:
65 friend class SkAAClip;
66 friend class SkRegion;
67
68 static void FillIRect(const SkIRect&, const SkRegion* clip, SkBlitter*);
69 static void FillXRect(const SkXRect&, const SkRegion* clip, SkBlitter*);
70 #ifdef SK_SCALAR_IS_FIXED
FillRect(const SkRect & rect,const SkRegion * clip,SkBlitter * blitter)71 static void FillRect(const SkRect& rect, const SkRegion* clip,
72 SkBlitter* blitter) {
73 SkScan::FillXRect(*(const SkXRect*)&rect, clip, blitter);
74 }
AntiFillRect(const SkRect & rect,const SkRegion * clip,SkBlitter * blitter)75 static void AntiFillRect(const SkRect& rect, const SkRegion* clip,
76 SkBlitter* blitter) {
77 SkScan::AntiFillXRect(*(const SkXRect*)&rect, clip, blitter);
78 }
79 #else
80 static void FillRect(const SkRect&, const SkRegion* clip, SkBlitter*);
81 static void AntiFillRect(const SkRect&, const SkRegion* clip, SkBlitter*);
82 #endif
83 static void AntiFillXRect(const SkXRect&, const SkRegion*, SkBlitter*);
84 static void FillPath(const SkPath&, const SkRegion& clip, SkBlitter*);
85 static void AntiFillPath(const SkPath&, const SkRegion& clip, SkBlitter*,
86 bool forceRLE = false);
87 static void FillTriangle(const SkPoint pts[], const SkRegion*, SkBlitter*);
88
89 static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize,
90 const SkRegion*, SkBlitter*);
91 static void HairLineRgn(const SkPoint&, const SkPoint&, const SkRegion*,
92 SkBlitter*);
93 static void AntiHairLineRgn(const SkPoint&, const SkPoint&, const SkRegion*,
94 SkBlitter*);
95 };
96
97 /** Assign an SkXRect from a SkIRect, by promoting the src rect's coordinates
98 from int to SkFixed. Does not check for overflow if the src coordinates
99 exceed 32K
100 */
XRect_set(SkXRect * xr,const SkIRect & src)101 static inline void XRect_set(SkXRect* xr, const SkIRect& src) {
102 xr->fLeft = SkIntToFixed(src.fLeft);
103 xr->fTop = SkIntToFixed(src.fTop);
104 xr->fRight = SkIntToFixed(src.fRight);
105 xr->fBottom = SkIntToFixed(src.fBottom);
106 }
107
108 /** Assign an SkXRect from a SkRect, by promoting the src rect's coordinates
109 from SkScalar to SkFixed. Does not check for overflow if the src coordinates
110 exceed 32K
111 */
XRect_set(SkXRect * xr,const SkRect & src)112 static inline void XRect_set(SkXRect* xr, const SkRect& src) {
113 xr->fLeft = SkScalarToFixed(src.fLeft);
114 xr->fTop = SkScalarToFixed(src.fTop);
115 xr->fRight = SkScalarToFixed(src.fRight);
116 xr->fBottom = SkScalarToFixed(src.fBottom);
117 }
118
119 /** Round the SkXRect coordinates, and store the result in the SkIRect.
120 */
XRect_round(const SkXRect & xr,SkIRect * dst)121 static inline void XRect_round(const SkXRect& xr, SkIRect* dst) {
122 dst->fLeft = SkFixedRound(xr.fLeft);
123 dst->fTop = SkFixedRound(xr.fTop);
124 dst->fRight = SkFixedRound(xr.fRight);
125 dst->fBottom = SkFixedRound(xr.fBottom);
126 }
127
128 /** Round the SkXRect coordinates out (i.e. use floor for left/top, and ceiling
129 for right/bottom), and store the result in the SkIRect.
130 */
XRect_roundOut(const SkXRect & xr,SkIRect * dst)131 static inline void XRect_roundOut(const SkXRect& xr, SkIRect* dst) {
132 dst->fLeft = SkFixedFloor(xr.fLeft);
133 dst->fTop = SkFixedFloor(xr.fTop);
134 dst->fRight = SkFixedCeil(xr.fRight);
135 dst->fBottom = SkFixedCeil(xr.fBottom);
136 }
137
138 #endif
139