SkScan.h revision 7ff678bc1618dc669648198a7bdca8adfb189505
18a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/* libs/graphics/sgl/SkScan.h 28a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com** 37ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org** Copyright 2011, 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 static void FillPath(const SkPath&, const SkRegion& clip, SkBlitter*); 468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 477ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org static void FillTriangle(const SkPoint pts[], const SkRegion*, SkBlitter*); 488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void FillTriangle(const SkPoint& a, const SkPoint& b, 498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPoint& c, const SkRegion* clip, 508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkBlitter* blitter) { 518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkPoint pts[3]; 528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com pts[0] = a; 538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com pts[1] = b; 548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com pts[2] = c; 558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com FillTriangle(pts, clip, blitter); 568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 587ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org static void HairLine(const SkPoint&, const SkPoint&, const SkRegion*, 597ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org 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 AntiFillXRect(const SkXRect&, const SkRegion* clip, SkBlitter*); 648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifdef SK_SCALAR_IS_FIXED 658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiFillRect(const SkRect& rect, const SkRegion* clip, 668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkBlitter* blitter) { 678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkScan::AntiFillXRect(*(const SkXRect*)&rect, clip, blitter); 688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#else 708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiFillRect(const SkRect&, const SkRegion* clip, SkBlitter*); 718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiFillPath(const SkPath&, const SkRegion& clip, SkBlitter*); 748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 757ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org static void AntiHairLine(const SkPoint&, const SkPoint&, const SkRegion*, 767ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org SkBlitter*); 778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiHairRect(const SkRect&, const SkRegion* clip, SkBlitter*); 788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiHairPath(const SkPath&, const SkRegion* clip, SkBlitter*); 797ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org 807ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org // draws with a miter-join 817ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org static void FrameRect(const SkRect&, SkScalar width, const SkRegion*, 827ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org SkBlitter*); 837ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org static void AntiFrameRect(const SkRect&, SkScalar width, const SkRegion*, 847ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org SkBlitter*); 858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}; 868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Assign an SkXRect from a SkIRect, by promoting the src rect's coordinates 888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com from int to SkFixed. Does not check for overflow if the src coordinates 898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com exceed 32K 908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 91fc25abdabff76f913fb9d4f373418c10a1eca92breed@android.comstatic inline void XRect_set(SkXRect* xr, const SkIRect& src) { 928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fLeft = SkIntToFixed(src.fLeft); 938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fTop = SkIntToFixed(src.fTop); 948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fRight = SkIntToFixed(src.fRight); 958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fBottom = SkIntToFixed(src.fBottom); 968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Assign an SkXRect from a SkRect, by promoting the src rect's coordinates 998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com from SkScalar to SkFixed. Does not check for overflow if the src coordinates 1008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com exceed 32K 1018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 102fc25abdabff76f913fb9d4f373418c10a1eca92breed@android.comstatic inline void XRect_set(SkXRect* xr, const SkRect& src) { 1038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fLeft = SkScalarToFixed(src.fLeft); 1048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fTop = SkScalarToFixed(src.fTop); 1058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fRight = SkScalarToFixed(src.fRight); 1068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fBottom = SkScalarToFixed(src.fBottom); 1078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 1088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Round the SkXRect coordinates, and store the result in the SkIRect. 1108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 111fc25abdabff76f913fb9d4f373418c10a1eca92breed@android.comstatic inline void XRect_round(const SkXRect& xr, SkIRect* dst) { 1128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fLeft = SkFixedRound(xr.fLeft); 1138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fTop = SkFixedRound(xr.fTop); 1148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fRight = SkFixedRound(xr.fRight); 1158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fBottom = SkFixedRound(xr.fBottom); 1168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 1178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Round the SkXRect coordinates out (i.e. use floor for left/top, and ceiling 1198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com for right/bottom), and store the result in the SkIRect. 1208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 121fc25abdabff76f913fb9d4f373418c10a1eca92breed@android.comstatic inline void XRect_roundOut(const SkXRect& xr, SkIRect* dst) { 1228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fLeft = SkFixedFloor(xr.fLeft); 1238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fTop = SkFixedFloor(xr.fTop); 1248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fRight = SkFixedCeil(xr.fRight); 1258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fBottom = SkFixedCeil(xr.fBottom); 1268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 1278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 129