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> gSkUseDeltaAA; 27 extern std::atomic<bool> gSkForceDeltaAA; 28 extern std::atomic<bool> gSkUseAnalyticAA; 29 extern std::atomic<bool> gSkForceAnalyticAA; 30 31 class AdditiveBlitter; 32 33 class SkScan { 34 public: 35 /* 36 * Draws count-1 line segments, one at a time: 37 * line(pts[0], pts[1]) 38 * line(pts[1], pts[2]) 39 * line(......, pts[count - 1]) 40 */ 41 typedef void (*HairRgnProc)(const SkPoint[], int count, const SkRegion*, SkBlitter*); 42 typedef void (*HairRCProc)(const SkPoint[], int count, const SkRasterClip&, SkBlitter*); 43 44 static void FillPath(const SkPath&, const SkIRect&, SkBlitter*); 45 46 /////////////////////////////////////////////////////////////////////////// 47 // rasterclip 48 49 static void FillIRect(const SkIRect&, const SkRasterClip&, SkBlitter*); 50 static void FillXRect(const SkXRect&, const SkRasterClip&, SkBlitter*); 51 static void FillRect(const SkRect&, const SkRasterClip&, SkBlitter*); 52 static void AntiFillRect(const SkRect&, const SkRasterClip&, SkBlitter*); 53 static void AntiFillXRect(const SkXRect&, const SkRasterClip&, SkBlitter*); 54 static void FillPath(const SkPath&, const SkRasterClip&, SkBlitter*); 55 static void AntiFillPath(const SkPath&, const SkRasterClip&, SkBlitter*, bool forceDAA); 56 static void FrameRect(const SkRect&, const SkPoint& strokeSize, 57 const SkRasterClip&, SkBlitter*); 58 static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize, 59 const SkRasterClip&, SkBlitter*); 60 static void FillTriangle(const SkPoint pts[], const SkRasterClip&, SkBlitter*); 61 static void HairLine(const SkPoint[], int count, const SkRasterClip&, SkBlitter*); 62 static void AntiHairLine(const SkPoint[], int count, const SkRasterClip&, SkBlitter*); 63 static void HairRect(const SkRect&, const SkRasterClip&, SkBlitter*); 64 static void AntiHairRect(const SkRect&, const SkRasterClip&, SkBlitter*); 65 static void HairPath(const SkPath&, const SkRasterClip&, SkBlitter*); 66 static void AntiHairPath(const SkPath&, const SkRasterClip&, SkBlitter*); 67 static void HairSquarePath(const SkPath&, const SkRasterClip&, SkBlitter*); 68 static void AntiHairSquarePath(const SkPath&, const SkRasterClip&, SkBlitter*); 69 static void HairRoundPath(const SkPath&, const SkRasterClip&, SkBlitter*); 70 static void AntiHairRoundPath(const SkPath&, const SkRasterClip&, SkBlitter*); 71 72 // Needed by do_fill_path in SkScanPriv.h 73 static void FillPath(const SkPath&, const SkRegion& clip, SkBlitter*); 74 75 static void AntiFillPath(const SkPath& path, const SkRasterClip& rc, SkBlitter* blitter) { 76 AntiFillPath(path, rc, blitter, false); 77 } 78 private: 79 friend class SkAAClip; 80 friend class SkRegion; 81 82 static void FillIRect(const SkIRect&, const SkRegion* clip, SkBlitter*); 83 static void FillXRect(const SkXRect&, const SkRegion* clip, SkBlitter*); 84 static void FillRect(const SkRect&, const SkRegion* clip, SkBlitter*); 85 static void AntiFillRect(const SkRect&, const SkRegion* clip, SkBlitter*); 86 static void AntiFillXRect(const SkXRect&, const SkRegion*, SkBlitter*); 87 static void AntiFillPath(const SkPath&, const SkRegion& clip, SkBlitter*, 88 bool forceRLE = false, bool forceDAA = false); 89 static void FillTriangle(const SkPoint pts[], const SkRegion*, SkBlitter*); 90 91 static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize, 92 const SkRegion*, SkBlitter*); 93 static void HairLineRgn(const SkPoint[], int count, const SkRegion*, SkBlitter*); 94 static void AntiHairLineRgn(const SkPoint[], int count, const SkRegion*, SkBlitter*); 95 static void AAAFillPath(const SkPath& path, SkBlitter* blitter, const SkIRect& pathIR, 96 const SkIRect& clipBounds, bool forceRLE); 97 static void DAAFillPath(const SkPath& path, SkBlitter* blitter, const SkIRect& pathIR, 98 const SkIRect& clipBounds, bool forceRLE); 99 static void SAAFillPath(const SkPath& path, SkBlitter* blitter, const SkIRect& pathIR, 100 const SkIRect& clipBounds, bool forceRLE); 101 }; 102 103 /** Assign an SkXRect from a SkIRect, by promoting the src rect's coordinates 104 from int to SkFixed. Does not check for overflow if the src coordinates 105 exceed 32K 106 */ 107 static inline void XRect_set(SkXRect* xr, const SkIRect& src) { 108 xr->fLeft = SkIntToFixed(src.fLeft); 109 xr->fTop = SkIntToFixed(src.fTop); 110 xr->fRight = SkIntToFixed(src.fRight); 111 xr->fBottom = SkIntToFixed(src.fBottom); 112 } 113 114 /** Assign an SkXRect from a SkRect, by promoting the src rect's coordinates 115 from SkScalar to SkFixed. Does not check for overflow if the src coordinates 116 exceed 32K 117 */ 118 static inline void XRect_set(SkXRect* xr, const SkRect& src) { 119 xr->fLeft = SkScalarToFixed(src.fLeft); 120 xr->fTop = SkScalarToFixed(src.fTop); 121 xr->fRight = SkScalarToFixed(src.fRight); 122 xr->fBottom = SkScalarToFixed(src.fBottom); 123 } 124 125 /** Round the SkXRect coordinates, and store the result in the SkIRect. 126 */ 127 static inline void XRect_round(const SkXRect& xr, SkIRect* dst) { 128 dst->fLeft = SkFixedRoundToInt(xr.fLeft); 129 dst->fTop = SkFixedRoundToInt(xr.fTop); 130 dst->fRight = SkFixedRoundToInt(xr.fRight); 131 dst->fBottom = SkFixedRoundToInt(xr.fBottom); 132 } 133 134 /** Round the SkXRect coordinates out (i.e. use floor for left/top, and ceiling 135 for right/bottom), and store the result in the SkIRect. 136 */ 137 static inline void XRect_roundOut(const SkXRect& xr, SkIRect* dst) { 138 dst->fLeft = SkFixedFloorToInt(xr.fLeft); 139 dst->fTop = SkFixedFloorToInt(xr.fTop); 140 dst->fRight = SkFixedCeilToInt(xr.fRight); 141 dst->fBottom = SkFixedCeilToInt(xr.fBottom); 142 } 143 144 #endif 145
