1 | /* |
2 | * Copyright 2011 The Android Open Source Project |
3 | * |
4 | * Use of this source code is governed by a BSD-style license that can be |
5 | * found in the LICENSE file. |
6 | */ |
7 | |
8 | |
9 | #ifndef SkScan_DEFINED |
10 | #define SkScan_DEFINED |
11 | |
12 | #include "include/core/SkRect.h" |
13 | #include "include/private/SkFixed.h" |
14 | #include "src/core/SkPathView.h" |
15 | |
16 | #include <atomic> |
17 | |
18 | class SkRasterClip; |
19 | class SkRegion; |
20 | class SkBlitter; |
21 | |
22 | /** Defines a fixed-point rectangle, identical to the integer SkIRect, but its |
23 | coordinates are treated as SkFixed rather than int32_t. |
24 | */ |
25 | typedef SkIRect SkXRect; |
26 | |
27 | extern std::atomic<bool> gSkUseAnalyticAA; |
28 | extern std::atomic<bool> gSkForceAnalyticAA; |
29 | |
30 | class AdditiveBlitter; |
31 | |
32 | class SkScan { |
33 | public: |
34 | /* |
35 | * Draws count-1 line segments, one at a time: |
36 | * line(pts[0], pts[1]) |
37 | * line(pts[1], pts[2]) |
38 | * line(......, pts[count - 1]) |
39 | */ |
40 | typedef void (*HairRgnProc)(const SkPoint[], int count, const SkRegion*, SkBlitter*); |
41 | typedef void (*HairRCProc)(const SkPoint[], int count, const SkRasterClip&, SkBlitter*); |
42 | |
43 | static void FillPath(const SkPathView&, const SkIRect&, SkBlitter*); |
44 | |
45 | /////////////////////////////////////////////////////////////////////////// |
46 | // rasterclip |
47 | |
48 | static void FillIRect(const SkIRect&, const SkRasterClip&, SkBlitter*); |
49 | static void FillXRect(const SkXRect&, const SkRasterClip&, SkBlitter*); |
50 | static void FillRect(const SkRect&, const SkRasterClip&, SkBlitter*); |
51 | static void AntiFillRect(const SkRect&, const SkRasterClip&, SkBlitter*); |
52 | static void AntiFillXRect(const SkXRect&, const SkRasterClip&, SkBlitter*); |
53 | static void FillPath(const SkPathView&, const SkRasterClip&, SkBlitter*); |
54 | static void AntiFillPath(const SkPathView&, const SkRasterClip&, SkBlitter*); |
55 | static void FrameRect(const SkRect&, const SkPoint& strokeSize, |
56 | const SkRasterClip&, SkBlitter*); |
57 | static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize, |
58 | const SkRasterClip&, SkBlitter*); |
59 | static void FillTriangle(const SkPoint pts[], const SkRasterClip&, SkBlitter*); |
60 | static void HairLine(const SkPoint[], int count, const SkRasterClip&, SkBlitter*); |
61 | static void AntiHairLine(const SkPoint[], int count, const SkRasterClip&, SkBlitter*); |
62 | static void HairRect(const SkRect&, const SkRasterClip&, SkBlitter*); |
63 | static void AntiHairRect(const SkRect&, const SkRasterClip&, SkBlitter*); |
64 | static void HairPath(const SkPathView&, const SkRasterClip&, SkBlitter*); |
65 | static void AntiHairPath(const SkPathView&, const SkRasterClip&, SkBlitter*); |
66 | static void HairSquarePath(const SkPathView&, const SkRasterClip&, SkBlitter*); |
67 | static void AntiHairSquarePath(const SkPathView&, const SkRasterClip&, SkBlitter*); |
68 | static void HairRoundPath(const SkPathView&, const SkRasterClip&, SkBlitter*); |
69 | static void AntiHairRoundPath(const SkPathView&, const SkRasterClip&, SkBlitter*); |
70 | |
71 | // Needed by do_fill_path in SkScanPriv.h |
72 | static void FillPath(const SkPathView&, const SkRegion& clip, SkBlitter*); |
73 | |
74 | private: |
75 | friend class SkAAClip; |
76 | friend class SkRegion; |
77 | |
78 | static void FillIRect(const SkIRect&, const SkRegion* clip, SkBlitter*); |
79 | static void FillXRect(const SkXRect&, const SkRegion* clip, SkBlitter*); |
80 | static void FillRect(const SkRect&, const SkRegion* clip, SkBlitter*); |
81 | static void AntiFillRect(const SkRect&, const SkRegion* clip, SkBlitter*); |
82 | static void AntiFillXRect(const SkXRect&, const SkRegion*, SkBlitter*); |
83 | static void AntiFillPath(const SkPathView&, const SkRegion& clip, SkBlitter*, bool forceRLE); |
84 | static void FillTriangle(const SkPoint pts[], const SkRegion*, SkBlitter*); |
85 | |
86 | static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize, |
87 | const SkRegion*, SkBlitter*); |
88 | static void HairLineRgn(const SkPoint[], int count, const SkRegion*, SkBlitter*); |
89 | static void AntiHairLineRgn(const SkPoint[], int count, const SkRegion*, SkBlitter*); |
90 | static void AAAFillPath(const SkPathView& path, SkBlitter* blitter, const SkIRect& pathIR, |
91 | const SkIRect& clipBounds, bool forceRLE); |
92 | static void SAAFillPath(const SkPathView& path, SkBlitter* blitter, const SkIRect& pathIR, |
93 | const SkIRect& clipBounds, bool forceRLE); |
94 | }; |
95 | |
96 | /** Assign an SkXRect from a SkIRect, by promoting the src rect's coordinates |
97 | from int to SkFixed. Does not check for overflow if the src coordinates |
98 | exceed 32K |
99 | */ |
100 | static inline void XRect_set(SkXRect* xr, const SkIRect& src) { |
101 | xr->fLeft = SkIntToFixed(src.fLeft); |
102 | xr->fTop = SkIntToFixed(src.fTop); |
103 | xr->fRight = SkIntToFixed(src.fRight); |
104 | xr->fBottom = SkIntToFixed(src.fBottom); |
105 | } |
106 | |
107 | /** Assign an SkXRect from a SkRect, by promoting the src rect's coordinates |
108 | from SkScalar to SkFixed. Does not check for overflow if the src coordinates |
109 | exceed 32K |
110 | */ |
111 | static inline void XRect_set(SkXRect* xr, const SkRect& src) { |
112 | xr->fLeft = SkScalarToFixed(src.fLeft); |
113 | xr->fTop = SkScalarToFixed(src.fTop); |
114 | xr->fRight = SkScalarToFixed(src.fRight); |
115 | xr->fBottom = SkScalarToFixed(src.fBottom); |
116 | } |
117 | |
118 | /** Round the SkXRect coordinates, and store the result in the SkIRect. |
119 | */ |
120 | static inline void XRect_round(const SkXRect& xr, SkIRect* dst) { |
121 | dst->fLeft = SkFixedRoundToInt(xr.fLeft); |
122 | dst->fTop = SkFixedRoundToInt(xr.fTop); |
123 | dst->fRight = SkFixedRoundToInt(xr.fRight); |
124 | dst->fBottom = SkFixedRoundToInt(xr.fBottom); |
125 | } |
126 | |
127 | /** Round the SkXRect coordinates out (i.e. use floor for left/top, and ceiling |
128 | for right/bottom), and store the result in the SkIRect. |
129 | */ |
130 | static inline void XRect_roundOut(const SkXRect& xr, SkIRect* dst) { |
131 | dst->fLeft = SkFixedFloorToInt(xr.fLeft); |
132 | dst->fTop = SkFixedFloorToInt(xr.fTop); |
133 | dst->fRight = SkFixedCeilToInt(xr.fRight); |
134 | dst->fBottom = SkFixedCeilToInt(xr.fBottom); |
135 | } |
136 | |
137 | #endif |
138 | |