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/*
* Copyright 2011 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkScan_DEFINED
#define SkScan_DEFINED
#include "SkFixed.h"
#include "SkRect.h"
#include <atomic>
class SkRasterClip;
class SkRegion;
class SkBlitter;
class SkPath;
/** Defines a fixed-point rectangle, identical to the integer SkIRect, but its
coordinates are treated as SkFixed rather than int32_t.
*/
typedef SkIRect SkXRect;
extern std::atomic<bool> gSkUseAnalyticAA;
extern std::atomic<bool> gSkForceAnalyticAA;
class AdditiveBlitter;
class SkScan {
public:
/*
* Draws count-1 line segments, one at a time:
* line(pts[0], pts[1])
* line(pts[1], pts[2])
* line(......, pts[count - 1])
*/
typedef void (*HairRgnProc)(const SkPoint[], int count, const SkRegion*, SkBlitter*);
typedef void (*HairRCProc)(const SkPoint[], int count, const SkRasterClip&, SkBlitter*);
static void FillPath(const SkPath&, const SkIRect&, SkBlitter*);
///////////////////////////////////////////////////////////////////////////
// rasterclip
static void FillIRect(const SkIRect&, const SkRasterClip&, SkBlitter*);
static void FillXRect(const SkXRect&, const SkRasterClip&, SkBlitter*);
static void FillRect(const SkRect&, const SkRasterClip&, SkBlitter*);
static void AntiFillRect(const SkRect&, const SkRasterClip&, SkBlitter*);
static void AntiFillXRect(const SkXRect&, const SkRasterClip&, SkBlitter*);
static void FillPath(const SkPath&, const SkRasterClip&, SkBlitter*);
static void AntiFillPath(const SkPath&, const SkRasterClip&, SkBlitter*);
static void AAAFillPath(const SkPath&, const SkRasterClip&, SkBlitter*);
static void FrameRect(const SkRect&, const SkPoint& strokeSize,
const SkRasterClip&, SkBlitter*);
static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize,
const SkRasterClip&, SkBlitter*);
static void FillTriangle(const SkPoint pts[], const SkRasterClip&, SkBlitter*);
static void HairLine(const SkPoint[], int count, const SkRasterClip&, SkBlitter*);
static void AntiHairLine(const SkPoint[], int count, const SkRasterClip&, SkBlitter*);
static void HairRect(const SkRect&, const SkRasterClip&, SkBlitter*);
static void AntiHairRect(const SkRect&, const SkRasterClip&, SkBlitter*);
static void HairPath(const SkPath&, const SkRasterClip&, SkBlitter*);
static void AntiHairPath(const SkPath&, const SkRasterClip&, SkBlitter*);
static void HairSquarePath(const SkPath&, const SkRasterClip&, SkBlitter*);
static void AntiHairSquarePath(const SkPath&, const SkRasterClip&, SkBlitter*);
static void HairRoundPath(const SkPath&, const SkRasterClip&, SkBlitter*);
static void AntiHairRoundPath(const SkPath&, const SkRasterClip&, SkBlitter*);
private:
friend class SkAAClip;
friend class SkRegion;
static void FillIRect(const SkIRect&, const SkRegion* clip, SkBlitter*);
static void FillXRect(const SkXRect&, const SkRegion* clip, SkBlitter*);
static void FillRect(const SkRect&, const SkRegion* clip, SkBlitter*);
static void AntiFillRect(const SkRect&, const SkRegion* clip, SkBlitter*);
static void AntiFillXRect(const SkXRect&, const SkRegion*, SkBlitter*);
static void FillPath(const SkPath&, const SkRegion& clip, SkBlitter*);
static void AntiFillPath(const SkPath&, const SkRegion& clip, SkBlitter*,
bool forceRLE = false);
static void FillTriangle(const SkPoint pts[], const SkRegion*, SkBlitter*);
static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize,
const SkRegion*, SkBlitter*);
static void HairLineRgn(const SkPoint[], int count, const SkRegion*, SkBlitter*);
static void AntiHairLineRgn(const SkPoint[], int count, const SkRegion*, SkBlitter*);
static void AAAFillPath(const SkPath& path, const SkRegion& origClip, SkBlitter* blitter,
bool forceRLE = false); // SkAAClip uses forceRLE
};
/** Assign an SkXRect from a SkIRect, by promoting the src rect's coordinates
from int to SkFixed. Does not check for overflow if the src coordinates
exceed 32K
*/
static inline void XRect_set(SkXRect* xr, const SkIRect& src) {
xr->fLeft = SkIntToFixed(src.fLeft);
xr->fTop = SkIntToFixed(src.fTop);
xr->fRight = SkIntToFixed(src.fRight);
xr->fBottom = SkIntToFixed(src.fBottom);
}
/** Assign an SkXRect from a SkRect, by promoting the src rect's coordinates
from SkScalar to SkFixed. Does not check for overflow if the src coordinates
exceed 32K
*/
static inline void XRect_set(SkXRect* xr, const SkRect& src) {
xr->fLeft = SkScalarToFixed(src.fLeft);
xr->fTop = SkScalarToFixed(src.fTop);
xr->fRight = SkScalarToFixed(src.fRight);
xr->fBottom = SkScalarToFixed(src.fBottom);
}
/** Round the SkXRect coordinates, and store the result in the SkIRect.
*/
static inline void XRect_round(const SkXRect& xr, SkIRect* dst) {
dst->fLeft = SkFixedRoundToInt(xr.fLeft);
dst->fTop = SkFixedRoundToInt(xr.fTop);
dst->fRight = SkFixedRoundToInt(xr.fRight);
dst->fBottom = SkFixedRoundToInt(xr.fBottom);
}
/** Round the SkXRect coordinates out (i.e. use floor for left/top, and ceiling
for right/bottom), and store the result in the SkIRect.
*/
static inline void XRect_roundOut(const SkXRect& xr, SkIRect* dst) {
dst->fLeft = SkFixedFloorToInt(xr.fLeft);
dst->fTop = SkFixedFloorToInt(xr.fTop);
dst->fRight = SkFixedCeilToInt(xr.fRight);
dst->fBottom = SkFixedCeilToInt(xr.fBottom);
}
#endif
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