mirror of https://github.com/axmolengine/axmol.git
129 lines
4.7 KiB
C++
129 lines
4.7 KiB
C++
/* libs/graphics/sgl/SkScan.h
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**
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** Copyright 2011, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#ifndef SkScan_DEFINED
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#define SkScan_DEFINED
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#include "SkRect.h"
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class SkRegion;
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class SkBlitter;
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class SkPath;
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/** Defines a fixed-point rectangle, identical to the integer SkIRect, but its
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coordinates are treated as SkFixed rather than int32_t.
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*/
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typedef SkIRect SkXRect;
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class SkScan {
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public:
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static void FillIRect(const SkIRect&, const SkRegion* clip, SkBlitter*);
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static void FillXRect(const SkXRect&, const SkRegion* clip, SkBlitter*);
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#ifdef SK_SCALAR_IS_FIXED
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static void FillRect(const SkRect& rect, const SkRegion* clip,
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SkBlitter* blitter) {
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SkScan::FillXRect(*(const SkXRect*)&rect, clip, blitter);
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}
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#else
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static void FillRect(const SkRect&, const SkRegion* clip, SkBlitter*);
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#endif
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static void FillPath(const SkPath&, const SkRegion& clip, SkBlitter*);
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static void FillTriangle(const SkPoint pts[], const SkRegion*, SkBlitter*);
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static void FillTriangle(const SkPoint& a, const SkPoint& b,
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const SkPoint& c, const SkRegion* clip,
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SkBlitter* blitter) {
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SkPoint pts[3];
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pts[0] = a;
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pts[1] = b;
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pts[2] = c;
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FillTriangle(pts, clip, blitter);
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}
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static void HairLine(const SkPoint&, const SkPoint&, const SkRegion*,
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SkBlitter*);
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static void HairRect(const SkRect&, const SkRegion* clip, SkBlitter*);
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static void HairPath(const SkPath&, const SkRegion* clip, SkBlitter*);
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static void AntiFillXRect(const SkXRect&, const SkRegion* clip, SkBlitter*);
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#ifdef SK_SCALAR_IS_FIXED
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static void AntiFillRect(const SkRect& rect, const SkRegion* clip,
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SkBlitter* blitter) {
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SkScan::AntiFillXRect(*(const SkXRect*)&rect, clip, blitter);
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}
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#else
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static void AntiFillRect(const SkRect&, const SkRegion* clip, SkBlitter*);
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#endif
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static void AntiFillPath(const SkPath&, const SkRegion& clip, SkBlitter*);
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static void AntiHairLine(const SkPoint&, const SkPoint&, const SkRegion*,
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SkBlitter*);
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static void AntiHairRect(const SkRect&, const SkRegion* clip, SkBlitter*);
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static void AntiHairPath(const SkPath&, const SkRegion* clip, SkBlitter*);
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// draws with a miter-join
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static void FrameRect(const SkRect&, const SkPoint& strokeSize,
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const SkRegion*, SkBlitter*);
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static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize,
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const SkRegion*, SkBlitter*);
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};
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/** Assign an SkXRect from a SkIRect, by promoting the src rect's coordinates
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from int to SkFixed. Does not check for overflow if the src coordinates
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exceed 32K
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*/
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static inline void XRect_set(SkXRect* xr, const SkIRect& src) {
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xr->fLeft = SkIntToFixed(src.fLeft);
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xr->fTop = SkIntToFixed(src.fTop);
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xr->fRight = SkIntToFixed(src.fRight);
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xr->fBottom = SkIntToFixed(src.fBottom);
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}
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/** Assign an SkXRect from a SkRect, by promoting the src rect's coordinates
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from SkScalar to SkFixed. Does not check for overflow if the src coordinates
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exceed 32K
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*/
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static inline void XRect_set(SkXRect* xr, const SkRect& src) {
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xr->fLeft = SkScalarToFixed(src.fLeft);
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xr->fTop = SkScalarToFixed(src.fTop);
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xr->fRight = SkScalarToFixed(src.fRight);
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xr->fBottom = SkScalarToFixed(src.fBottom);
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}
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/** Round the SkXRect coordinates, and store the result in the SkIRect.
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*/
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static inline void XRect_round(const SkXRect& xr, SkIRect* dst) {
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dst->fLeft = SkFixedRound(xr.fLeft);
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dst->fTop = SkFixedRound(xr.fTop);
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dst->fRight = SkFixedRound(xr.fRight);
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dst->fBottom = SkFixedRound(xr.fBottom);
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}
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/** Round the SkXRect coordinates out (i.e. use floor for left/top, and ceiling
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for right/bottom), and store the result in the SkIRect.
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*/
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static inline void XRect_roundOut(const SkXRect& xr, SkIRect* dst) {
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dst->fLeft = SkFixedFloor(xr.fLeft);
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dst->fTop = SkFixedFloor(xr.fTop);
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dst->fRight = SkFixedCeil(xr.fRight);
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dst->fBottom = SkFixedCeil(xr.fBottom);
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}
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#endif
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