| /* |
| * Copyright (c) 2000, 2001, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #ifndef LineUtils_h_Included |
| #define LineUtils_h_Included |
| |
| #define SIGNED(d, v) (((d) < 0) ? (-((jint) (v))) : ((jint) (v))) |
| #define SWAP(a, b, t) do { jint t = a; a = b; b = t; } while (0) |
| #define SETORDERED(a,b,min,max, shorten) \ |
| do { \ |
| if (a < b) { \ |
| min = a; \ |
| max = b - shorten; \ |
| } else { \ |
| min = b + shorten; \ |
| max = a; \ |
| } \ |
| } while (0) |
| |
| #define BUMP_NOOP 0x0 |
| #define BUMP_POS_PIXEL 0x1 |
| #define BUMP_NEG_PIXEL 0x2 |
| #define BUMP_POS_SCAN 0x4 |
| #define BUMP_NEG_SCAN 0x8 |
| |
| extern jboolean LineUtils_SetupBresenham(jint x1, jint y1, jint x2, jint y2, |
| jint shorten, |
| SurfaceDataBounds *pBounds, |
| jint *pStartX, jint *pStartY, |
| jint *pSteps, jint *pError, |
| jint *pErrMajor, jint *pBumpMajorMask, |
| jint *pErrMinor, jint *pBumpMinorMask); |
| |
| #define LineUtils_ProcessLine(pRasInfo, pixel, pLine, pPrim, pCompInfo, \ |
| X1, Y1, X2, Y2, shorten) \ |
| do { \ |
| jint tx1, ty1, tx2, ty2; \ |
| if (Y1 == Y2) { \ |
| if (Y1 >= (pRasInfo)->bounds.y1 && Y1 < (pRasInfo)->bounds.y2) { \ |
| SETORDERED(X1, X2, tx1, tx2, shorten); \ |
| if (++tx2 < tx1) --tx2; /* integer overflow */ \ |
| if (tx1 < (pRasInfo)->bounds.x1) tx1 = (pRasInfo)->bounds.x1; \ |
| if (tx2 > (pRasInfo)->bounds.x2) tx2 = (pRasInfo)->bounds.x2; \ |
| if (tx1 < tx2) { \ |
| (*pLine)((pRasInfo), tx1, Y1, pixel, tx2 - tx1, 0, \ |
| BUMP_POS_PIXEL, 0, \ |
| BUMP_NOOP, 0, pPrim, pCompInfo); \ |
| } \ |
| } \ |
| } else if (X1 == X2) { \ |
| if (X1 >= (pRasInfo)->bounds.x1 && X1 < (pRasInfo)->bounds.x2) { \ |
| SETORDERED(Y1, Y2, ty1, ty2, shorten); \ |
| if (++ty2 < ty1) --ty2; /* integer overflow */ \ |
| if (ty1 < (pRasInfo)->bounds.y1) ty1 = (pRasInfo)->bounds.y1; \ |
| if (ty2 > (pRasInfo)->bounds.y2) ty2 = (pRasInfo)->bounds.y2; \ |
| if (ty1 < ty2) { \ |
| (*pLine)((pRasInfo), X1, ty1, pixel, ty2 - ty1, 0, \ |
| BUMP_POS_SCAN, 0, \ |
| BUMP_NOOP, 0, pPrim, pCompInfo); \ |
| } \ |
| } \ |
| } else { \ |
| jint steps; \ |
| jint error; \ |
| jint errmajor, errminor; \ |
| jint bumpmajormask, bumpminormask; \ |
| if (LineUtils_SetupBresenham(X1, Y1, X2, Y2, shorten, \ |
| &(pRasInfo)->bounds, \ |
| &tx1, &ty1, \ |
| &steps, &error, \ |
| &errmajor, &bumpmajormask, \ |
| &errminor, &bumpminormask)) \ |
| { \ |
| (*pLine)((pRasInfo), tx1, ty1, pixel, steps, error, \ |
| bumpmajormask, errmajor, bumpminormask, errminor, \ |
| pPrim, pCompInfo); \ |
| } \ |
| } \ |
| } while (0) |
| |
| #endif /* LineUtils_h_Included */ |
