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 /* 28 * Draws count-1 line segments, one at a time: 29 * line(pts[0], pts[1]) 30 * line(pts[1], pts[2]) 31 * line(......, pts[count - 1]) 32 */ 33 typedef void (*HairRgnProc)(const SkPoint[], int count, const SkRegion*, SkBlitter*); 34 typedef void (*HairRCProc)(const SkPoint[], int count, const SkRasterClip&, SkBlitter*); 35 36 static void FillPath(const SkPath&, const SkIRect&, SkBlitter*); 37 38 /////////////////////////////////////////////////////////////////////////// 39 // rasterclip 40 41 static void FillIRect(const SkIRect&, const SkRasterClip&, SkBlitter*); 42 static void FillXRect(const SkXRect&, const SkRasterClip&, SkBlitter*); 43 static void FillRect(const SkRect&, const SkRasterClip&, SkBlitter*); 44 static void AntiFillRect(const SkRect&, const SkRasterClip&, SkBlitter*); 45 static void AntiFillXRect(const SkXRect&, const SkRasterClip&, SkBlitter*); 46 static void FillPath(const SkPath&, const SkRasterClip&, SkBlitter*); 47 static void AntiFillPath(const SkPath&, const SkRasterClip&, SkBlitter*); 48 static void FrameRect(const SkRect&, const SkPoint& strokeSize, 49 const SkRasterClip&, SkBlitter*); 50 static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize, 51 const SkRasterClip&, SkBlitter*); 52 static void FillTriangle(const SkPoint pts[], const SkRasterClip&, SkBlitter*); 53 static void HairLine(const SkPoint[], int count, const SkRasterClip&, SkBlitter*); 54 static void AntiHairLine(const SkPoint[], int count, const SkRasterClip&, SkBlitter*); 55 static void HairRect(const SkRect&, const SkRasterClip&, SkBlitter*); 56 static void AntiHairRect(const SkRect&, const SkRasterClip&, SkBlitter*); 57 static void HairPath(const SkPath&, const SkRasterClip&, SkBlitter*); 58 static void AntiHairPath(const SkPath&, const SkRasterClip&, SkBlitter*); 59 static void HairSquarePath(const SkPath&, const SkRasterClip&, SkBlitter*); 60 static void AntiHairSquarePath(const SkPath&, const SkRasterClip&, SkBlitter*); 61 static void HairRoundPath(const SkPath&, const SkRasterClip&, SkBlitter*); 62 static void AntiHairRoundPath(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 static void FillRect(const SkRect&, const SkRegion* clip, SkBlitter*); 71 static void AntiFillRect(const SkRect&, const SkRegion* clip, SkBlitter*); 72 static void AntiFillXRect(const SkXRect&, const SkRegion*, SkBlitter*); 73 static void FillPath(const SkPath&, const SkRegion& clip, SkBlitter*); 74 static void AntiFillPath(const SkPath&, const SkRegion& clip, SkBlitter*, 75 bool forceRLE = false); 76 static void FillTriangle(const SkPoint pts[], const SkRegion*, SkBlitter*); 77 78 static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize, 79 const SkRegion*, SkBlitter*); 80 static void HairLineRgn(const SkPoint[], int count, const SkRegion*, SkBlitter*); 81 static void AntiHairLineRgn(const SkPoint[], int count, const SkRegion*, SkBlitter*); 82 }; 83 84 /** Assign an SkXRect from a SkIRect, by promoting the src rect's coordinates 85 from int to SkFixed. Does not check for overflow if the src coordinates 86 exceed 32K 87 */ 88 static inline void XRect_set(SkXRect* xr, const SkIRect& src) { 89 xr->fLeft = SkIntToFixed(src.fLeft); 90 xr->fTop = SkIntToFixed(src.fTop); 91 xr->fRight = SkIntToFixed(src.fRight); 92 xr->fBottom = SkIntToFixed(src.fBottom); 93 } 94 95 /** Assign an SkXRect from a SkRect, by promoting the src rect's coordinates 96 from SkScalar to SkFixed. Does not check for overflow if the src coordinates 97 exceed 32K 98 */ 99 static inline void XRect_set(SkXRect* xr, const SkRect& src) { 100 xr->fLeft = SkScalarToFixed(src.fLeft); 101 xr->fTop = SkScalarToFixed(src.fTop); 102 xr->fRight = SkScalarToFixed(src.fRight); 103 xr->fBottom = SkScalarToFixed(src.fBottom); 104 } 105 106 /** Round the SkXRect coordinates, and store the result in the SkIRect. 107 */ 108 static inline void XRect_round(const SkXRect& xr, SkIRect* dst) { 109 dst->fLeft = SkFixedRoundToInt(xr.fLeft); 110 dst->fTop = SkFixedRoundToInt(xr.fTop); 111 dst->fRight = SkFixedRoundToInt(xr.fRight); 112 dst->fBottom = SkFixedRoundToInt(xr.fBottom); 113 } 114 115 /** Round the SkXRect coordinates out (i.e. use floor for left/top, and ceiling 116 for right/bottom), and store the result in the SkIRect. 117 */ 118 static inline void XRect_roundOut(const SkXRect& xr, SkIRect* dst) { 119 dst->fLeft = SkFixedFloorToInt(xr.fLeft); 120 dst->fTop = SkFixedFloorToInt(xr.fTop); 121 dst->fRight = SkFixedCeilToInt(xr.fRight); 122 dst->fBottom = SkFixedCeilToInt(xr.fBottom); 123 } 124 125 #endif 126
