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/* libs/graphics/sgl/SkScan.h
**
** Copyright 2011, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#ifndef SkScan_DEFINED
#define SkScan_DEFINED
#include "SkRect.h"
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;
class SkScan {
public:
static void FillIRect(const SkIRect&, const SkRegion* clip, SkBlitter*);
static void FillXRect(const SkXRect&, const SkRegion* clip, SkBlitter*);
#ifdef SK_SCALAR_IS_FIXED
static void FillRect(const SkRect& rect, const SkRegion* clip,
SkBlitter* blitter) {
SkScan::FillXRect(*(const SkXRect*)&rect, clip, blitter);
}
#else
static void FillRect(const SkRect&, const SkRegion* clip, SkBlitter*);
#endif
static void FillPath(const SkPath&, const SkRegion& clip, SkBlitter*);
static void FillTriangle(const SkPoint pts[], const SkRegion*, SkBlitter*);
static void FillTriangle(const SkPoint& a, const SkPoint& b,
const SkPoint& c, const SkRegion* clip,
SkBlitter* blitter) {
SkPoint pts[3];
pts[0] = a;
pts[1] = b;
pts[2] = c;
FillTriangle(pts, clip, blitter);
}
static void HairLine(const SkPoint&, const SkPoint&, const SkRegion*,
SkBlitter*);
static void HairRect(const SkRect&, const SkRegion* clip, SkBlitter*);
static void HairPath(const SkPath&, const SkRegion* clip, SkBlitter*);
static void AntiFillXRect(const SkXRect&, const SkRegion* clip, SkBlitter*);
#ifdef SK_SCALAR_IS_FIXED
static void AntiFillRect(const SkRect& rect, const SkRegion* clip,
SkBlitter* blitter) {
SkScan::AntiFillXRect(*(const SkXRect*)&rect, clip, blitter);
}
#else
static void AntiFillRect(const SkRect&, const SkRegion* clip, SkBlitter*);
#endif
static void AntiFillPath(const SkPath&, const SkRegion& clip, SkBlitter*);
static void AntiHairLine(const SkPoint&, const SkPoint&, const SkRegion*,
SkBlitter*);
static void AntiHairRect(const SkRect&, const SkRegion* clip, SkBlitter*);
static void AntiHairPath(const SkPath&, const SkRegion* clip, SkBlitter*);
// draws with a miter-join
static void FrameRect(const SkRect&, const SkPoint& strokeSize,
const SkRegion*, SkBlitter*);
static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize,
const SkRegion*, SkBlitter*);
};
/** 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 = SkFixedRound(xr.fLeft);
dst->fTop = SkFixedRound(xr.fTop);
dst->fRight = SkFixedRound(xr.fRight);
dst->fBottom = SkFixedRound(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 = SkFixedFloor(xr.fLeft);
dst->fTop = SkFixedFloor(xr.fTop);
dst->fRight = SkFixedCeil(xr.fRight);
dst->fBottom = SkFixedCeil(xr.fBottom);
}
#endif
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