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