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 "SkCoverageDelta.h" 13 #include "SkFixed.h" 14 #include "SkRect.h" 15 #include <atomic> 16 17 class SkRasterClip; 18 class SkRegion; 19 class SkBlitter; 20 class SkPath; 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> gSkUseDeltaAA; 28 extern std::atomic<bool> gSkForceDeltaAA; 29 extern std::atomic<bool> gSkUseAnalyticAA; 30 extern std::atomic<bool> gSkForceAnalyticAA; 31 32 class AdditiveBlitter; 33 34 class SkScan { 35 public: 36 /* 37 * Draws count-1 line segments, one at a time: 38 * line(pts[0], pts[1]) 39 * line(pts[1], pts[2]) 40 * line(......, pts[count - 1]) 41 */ 42 typedef void (*HairRgnProc)(const SkPoint[], int count, const SkRegion*, SkBlitter*); 43 typedef void (*HairRCProc)(const SkPoint[], int count, const SkRasterClip&, SkBlitter*); 44 45 static void FillPath(const SkPath&, const SkIRect&, SkBlitter*); 46 47 /////////////////////////////////////////////////////////////////////////// 48 // rasterclip 49 50 static void FillIRect(const SkIRect&, const SkRasterClip&, SkBlitter*); 51 static void FillXRect(const SkXRect&, const SkRasterClip&, SkBlitter*); 52 static void FillRect(const SkRect&, const SkRasterClip&, SkBlitter*); 53 static void AntiFillRect(const SkRect&, const SkRasterClip&, SkBlitter*); 54 static void AntiFillXRect(const SkXRect&, const SkRasterClip&, SkBlitter*); 55 static void FillPath(const SkPath&, const SkRasterClip&, SkBlitter*); 56 static void AntiFillPath(const SkPath&, const SkRasterClip&, SkBlitter*, SkDAARecord*); 57 static void FrameRect(const SkRect&, const SkPoint& strokeSize, 58 const SkRasterClip&, SkBlitter*); 59 static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize, 60 const SkRasterClip&, SkBlitter*); 61 static void FillTriangle(const SkPoint pts[], const SkRasterClip&, SkBlitter*); 62 static void HairLine(const SkPoint[], int count, const SkRasterClip&, SkBlitter*); 63 static void AntiHairLine(const SkPoint[], int count, const SkRasterClip&, SkBlitter*); 64 static void HairRect(const SkRect&, const SkRasterClip&, SkBlitter*); 65 static void AntiHairRect(const SkRect&, const SkRasterClip&, SkBlitter*); 66 static void HairPath(const SkPath&, const SkRasterClip&, SkBlitter*); 67 static void AntiHairPath(const SkPath&, const SkRasterClip&, SkBlitter*); 68 static void HairSquarePath(const SkPath&, const SkRasterClip&, SkBlitter*); 69 static void AntiHairSquarePath(const SkPath&, const SkRasterClip&, SkBlitter*); 70 static void HairRoundPath(const SkPath&, const SkRasterClip&, SkBlitter*); 71 static void AntiHairRoundPath(const SkPath&, const SkRasterClip&, SkBlitter*); 72 73 // Needed by do_fill_path in SkScanPriv.h 74 static void FillPath(const SkPath&, const SkRegion& clip, SkBlitter*); 75 76 // We have this instead of a default nullptr parameter because of function pointer match. 77 static void AntiFillPath(const SkPath& path, const SkRasterClip& rc, SkBlitter* blitter) { 78 AntiFillPath(path, rc, blitter, nullptr); 79 } 80 private: 81 friend class SkAAClip; 82 friend class SkRegion; 83 84 static void FillIRect(const SkIRect&, const SkRegion* clip, SkBlitter*); 85 static void FillXRect(const SkXRect&, const SkRegion* clip, SkBlitter*); 86 static void FillRect(const SkRect&, const SkRegion* clip, SkBlitter*); 87 static void AntiFillRect(const SkRect&, const SkRegion* clip, SkBlitter*); 88 static void AntiFillXRect(const SkXRect&, const SkRegion*, SkBlitter*); 89 static void AntiFillPath(const SkPath&, const SkRegion& clip, SkBlitter*, 90 bool forceRLE = false, SkDAARecord* daaRecord = nullptr); 91 static void FillTriangle(const SkPoint pts[], const SkRegion*, SkBlitter*); 92 93 static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize, 94 const SkRegion*, SkBlitter*); 95 static void HairLineRgn(const SkPoint[], int count, const SkRegion*, SkBlitter*); 96 static void AntiHairLineRgn(const SkPoint[], int count, const SkRegion*, SkBlitter*); 97 static void AAAFillPath(const SkPath& path, SkBlitter* blitter, const SkIRect& pathIR, 98 const SkIRect& clipBounds, bool forceRLE); 99 static void DAAFillPath(const SkPath& path, SkBlitter* blitter, const SkIRect& pathIR, 100 const SkIRect& clipBounds, bool forceRLE, SkDAARecord* daaRecord); 101 static void SAAFillPath(const SkPath& path, SkBlitter* blitter, const SkIRect& pathIR, 102 const SkIRect& clipBounds, bool forceRLE); 103 }; 104 105 /** Assign an SkXRect from a SkIRect, by promoting the src rect's coordinates 106 from int to SkFixed. Does not check for overflow if the src coordinates 107 exceed 32K 108 */ 109 static inline void XRect_set(SkXRect* xr, const SkIRect& src) { 110 xr->fLeft = SkIntToFixed(src.fLeft); 111 xr->fTop = SkIntToFixed(src.fTop); 112 xr->fRight = SkIntToFixed(src.fRight); 113 xr->fBottom = SkIntToFixed(src.fBottom); 114 } 115 116 /** Assign an SkXRect from a SkRect, by promoting the src rect's coordinates 117 from SkScalar to SkFixed. Does not check for overflow if the src coordinates 118 exceed 32K 119 */ 120 static inline void XRect_set(SkXRect* xr, const SkRect& src) { 121 xr->fLeft = SkScalarToFixed(src.fLeft); 122 xr->fTop = SkScalarToFixed(src.fTop); 123 xr->fRight = SkScalarToFixed(src.fRight); 124 xr->fBottom = SkScalarToFixed(src.fBottom); 125 } 126 127 /** Round the SkXRect coordinates, and store the result in the SkIRect. 128 */ 129 static inline void XRect_round(const SkXRect& xr, SkIRect* dst) { 130 dst->fLeft = SkFixedRoundToInt(xr.fLeft); 131 dst->fTop = SkFixedRoundToInt(xr.fTop); 132 dst->fRight = SkFixedRoundToInt(xr.fRight); 133 dst->fBottom = SkFixedRoundToInt(xr.fBottom); 134 } 135 136 /** Round the SkXRect coordinates out (i.e. use floor for left/top, and ceiling 137 for right/bottom), and store the result in the SkIRect. 138 */ 139 static inline void XRect_roundOut(const SkXRect& xr, SkIRect* dst) { 140 dst->fLeft = SkFixedFloorToInt(xr.fLeft); 141 dst->fTop = SkFixedFloorToInt(xr.fTop); 142 dst->fRight = SkFixedCeilToInt(xr.fRight); 143 dst->fBottom = SkFixedCeilToInt(xr.fBottom); 144 } 145 146 #endif 147
