SkScan.h revision 8a1c16ff38322f0210116fa7293eb8817c7e477e
18a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/* libs/graphics/sgl/SkScan.h 28a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com** 38a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com** Copyright 2006, The Android Open Source Project 48a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com** 58a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com** Licensed under the Apache License, Version 2.0 (the "License"); 68a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com** you may not use this file except in compliance with the License. 78a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com** You may obtain a copy of the License at 88a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com** 98a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com** http://www.apache.org/licenses/LICENSE-2.0 108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com** 118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com** Unless required by applicable law or agreed to in writing, software 128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com** distributed under the License is distributed on an "AS IS" BASIS, 138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com** See the License for the specific language governing permissions and 158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com** limitations under the License. 168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifndef SkScan_DEFINED 198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SkScan_DEFINED 208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkRect.h" 228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkRegion; 248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkBlitter; 258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkPath; 268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Defines a fixed-point rectangle, identical to the integer SkIRect, but its 288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com coordinates are treated as SkFixed rather than int32_t. 298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comtypedef SkIRect SkXRect; 318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkScan { 338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.compublic: 348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void FillIRect(const SkIRect&, const SkRegion* clip, SkBlitter*); 358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void FillXRect(const SkXRect&, const SkRegion* clip, SkBlitter*); 368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifdef SK_SCALAR_IS_FIXED 388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void FillRect(const SkRect& rect, const SkRegion* clip, 398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkBlitter* blitter) { 408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkScan::FillXRect(*(const SkXRect*)&rect, clip, blitter); 418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#else 438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void FillRect(const SkRect&, const SkRegion* clip, SkBlitter*); 448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void FillTriangle(const SkPoint pts[], const SkRegion*, SkBlitter*); 478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void FillPath(const SkPath&, const SkRegion& clip, SkBlitter*); 488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void FillTriangle(const SkPoint& a, const SkPoint& b, 508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPoint& c, const SkRegion* clip, 518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkBlitter* blitter) { 528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkPoint pts[3]; 538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com pts[0] = a; 548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com pts[1] = b; 558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com pts[2] = c; 568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com FillTriangle(pts, clip, blitter); 578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void HairLine(const SkPoint&, const SkPoint&, const SkRegion* clip, SkBlitter*); 608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void HairRect(const SkRect&, const SkRegion* clip, SkBlitter*); 618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void HairPath(const SkPath&, const SkRegion* clip, SkBlitter*); 628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void FrameRect(const SkRect&, SkScalar width, const SkRegion* clip, SkBlitter*); 648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiFillXRect(const SkXRect&, const SkRegion* clip, SkBlitter*); 668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifdef SK_SCALAR_IS_FIXED 678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiFillRect(const SkRect& rect, const SkRegion* clip, 688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkBlitter* blitter) { 698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkScan::AntiFillXRect(*(const SkXRect*)&rect, clip, blitter); 708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#else 728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiFillRect(const SkRect&, const SkRegion* clip, SkBlitter*); 738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiFillPath(const SkPath&, const SkRegion& clip, SkBlitter*); 768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiHairLine(const SkPoint&, const SkPoint&, const SkRegion* clip, SkBlitter*); 788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiHairRect(const SkRect&, const SkRegion* clip, SkBlitter*); 798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiHairPath(const SkPath&, const SkRegion* clip, SkBlitter*); 808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}; 818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Assign an SkXRect from a SkIRect, by promoting the src rect's coordinates 838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com from int to SkFixed. Does not check for overflow if the src coordinates 848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com exceed 32K 858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void XRect_set(SkXRect* xr, const SkIRect& src) { 878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fLeft = SkIntToFixed(src.fLeft); 888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fTop = SkIntToFixed(src.fTop); 898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fRight = SkIntToFixed(src.fRight); 908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fBottom = SkIntToFixed(src.fBottom); 918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Assign an SkXRect from a SkRect, by promoting the src rect's coordinates 948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com from SkScalar to SkFixed. Does not check for overflow if the src coordinates 958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com exceed 32K 968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void XRect_set(SkXRect* xr, const SkRect& src) { 988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fLeft = SkScalarToFixed(src.fLeft); 998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fTop = SkScalarToFixed(src.fTop); 1008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fRight = SkScalarToFixed(src.fRight); 1018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fBottom = SkScalarToFixed(src.fBottom); 1028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 1038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Round the SkXRect coordinates, and store the result in the SkIRect. 1058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 1068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void XRect_round(const SkXRect& xr, SkIRect* dst) { 1078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fLeft = SkFixedRound(xr.fLeft); 1088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fTop = SkFixedRound(xr.fTop); 1098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fRight = SkFixedRound(xr.fRight); 1108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fBottom = SkFixedRound(xr.fBottom); 1118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 1128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Round the SkXRect coordinates out (i.e. use floor for left/top, and ceiling 1148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com for right/bottom), and store the result in the SkIRect. 1158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 1168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void XRect_roundOut(const SkXRect& xr, SkIRect* dst) { 1178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fLeft = SkFixedFloor(xr.fLeft); 1188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fTop = SkFixedFloor(xr.fTop); 1198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fRight = SkFixedCeil(xr.fRight); 1208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fBottom = SkFixedCeil(xr.fBottom); 1218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 1228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 124