SkScan.h revision ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976e
1ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com 2ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com/* 3ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * Copyright 2011 The Android Open Source Project 4ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * 5ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * Use of this source code is governed by a BSD-style license that can be 6ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * found in the LICENSE file. 7ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com */ 8ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com 98a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifndef SkScan_DEFINED 118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SkScan_DEFINED 128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkRect.h" 148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkRegion; 168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkBlitter; 178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkPath; 188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Defines a fixed-point rectangle, identical to the integer SkIRect, but its 208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com coordinates are treated as SkFixed rather than int32_t. 218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comtypedef SkIRect SkXRect; 238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkScan { 258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.compublic: 268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void FillIRect(const SkIRect&, const SkRegion* clip, SkBlitter*); 278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void FillXRect(const SkXRect&, const SkRegion* clip, SkBlitter*); 288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifdef SK_SCALAR_IS_FIXED 308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void FillRect(const SkRect& rect, const SkRegion* clip, 318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkBlitter* blitter) { 328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkScan::FillXRect(*(const SkXRect*)&rect, clip, blitter); 338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#else 358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void FillRect(const SkRect&, const SkRegion* clip, SkBlitter*); 368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void FillPath(const SkPath&, const SkRegion& clip, SkBlitter*); 388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 397ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org static void FillTriangle(const SkPoint pts[], const SkRegion*, SkBlitter*); 408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void FillTriangle(const SkPoint& a, const SkPoint& b, 418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const SkPoint& c, const SkRegion* clip, 428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkBlitter* blitter) { 438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkPoint pts[3]; 448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com pts[0] = a; 458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com pts[1] = b; 468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com pts[2] = c; 478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com FillTriangle(pts, clip, blitter); 488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 507ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org static void HairLine(const SkPoint&, const SkPoint&, const SkRegion*, 517ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org SkBlitter*); 528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void HairRect(const SkRect&, const SkRegion* clip, SkBlitter*); 538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void HairPath(const SkPath&, const SkRegion* clip, SkBlitter*); 548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiFillXRect(const SkXRect&, const SkRegion* clip, SkBlitter*); 568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifdef SK_SCALAR_IS_FIXED 578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiFillRect(const SkRect& rect, const SkRegion* clip, 588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkBlitter* blitter) { 598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkScan::AntiFillXRect(*(const SkXRect*)&rect, clip, blitter); 608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#else 628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiFillRect(const SkRect&, const SkRegion* clip, SkBlitter*); 638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiFillPath(const SkPath&, const SkRegion& clip, SkBlitter*); 668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 677ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org static void AntiHairLine(const SkPoint&, const SkPoint&, const SkRegion*, 687ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org SkBlitter*); 698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiHairRect(const SkRect&, const SkRegion* clip, SkBlitter*); 708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com static void AntiHairPath(const SkPath&, const SkRegion* clip, SkBlitter*); 717ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org 727ff678bc1618dc669648198a7bdca8adfb189505mike@reedtribe.org // draws with a miter-join 73761fb62b0eb174783316d2a8b933fba896ca6355reed@google.com static void FrameRect(const SkRect&, const SkPoint& strokeSize, 74761fb62b0eb174783316d2a8b933fba896ca6355reed@google.com const SkRegion*, SkBlitter*); 75761fb62b0eb174783316d2a8b933fba896ca6355reed@google.com static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize, 76761fb62b0eb174783316d2a8b933fba896ca6355reed@google.com const SkRegion*, SkBlitter*); 778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}; 788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Assign an SkXRect from a SkIRect, by promoting the src rect's coordinates 808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com from int to SkFixed. Does not check for overflow if the src coordinates 818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com exceed 32K 828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 83fc25abdabff76f913fb9d4f373418c10a1eca92breed@android.comstatic inline void XRect_set(SkXRect* xr, const SkIRect& src) { 848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fLeft = SkIntToFixed(src.fLeft); 858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fTop = SkIntToFixed(src.fTop); 868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fRight = SkIntToFixed(src.fRight); 878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fBottom = SkIntToFixed(src.fBottom); 888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Assign an SkXRect from a SkRect, by promoting the src rect's coordinates 918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com from SkScalar to SkFixed. Does not check for overflow if the src coordinates 928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com exceed 32K 938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 94fc25abdabff76f913fb9d4f373418c10a1eca92breed@android.comstatic inline void XRect_set(SkXRect* xr, const SkRect& src) { 958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fLeft = SkScalarToFixed(src.fLeft); 968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fTop = SkScalarToFixed(src.fTop); 978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fRight = SkScalarToFixed(src.fRight); 988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com xr->fBottom = SkScalarToFixed(src.fBottom); 998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 1008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Round the SkXRect coordinates, and store the result in the SkIRect. 1028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 103fc25abdabff76f913fb9d4f373418c10a1eca92breed@android.comstatic inline void XRect_round(const SkXRect& xr, SkIRect* dst) { 1048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fLeft = SkFixedRound(xr.fLeft); 1058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fTop = SkFixedRound(xr.fTop); 1068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fRight = SkFixedRound(xr.fRight); 1078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fBottom = SkFixedRound(xr.fBottom); 1088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 1098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Round the SkXRect coordinates out (i.e. use floor for left/top, and ceiling 1118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com for right/bottom), and store the result in the SkIRect. 1128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 113fc25abdabff76f913fb9d4f373418c10a1eca92breed@android.comstatic inline void XRect_roundOut(const SkXRect& xr, SkIRect* dst) { 1148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fLeft = SkFixedFloor(xr.fLeft); 1158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fTop = SkFixedFloor(xr.fTop); 1168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fRight = SkFixedCeil(xr.fRight); 1178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fBottom = SkFixedCeil(xr.fBottom); 1188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 1198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 121