| /* |
| * Copyright (c) 2008, 2010, 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 ParallelogramUtils_h_Included |
| #define ParallelogramUtils_h_Included |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #define PGRAM_MIN_MAX(bmin, bmax, v0, dv1, dv2, AA) \ |
| do { \ |
| double vmin, vmax; \ |
| if (dv1 < 0) { \ |
| vmin = v0+dv1; \ |
| vmax = v0; \ |
| } else { \ |
| vmin = v0; \ |
| vmax = v0+dv1; \ |
| } \ |
| if (dv2 < 0) { \ |
| vmin += dv2; \ |
| } else { \ |
| vmax += dv2; \ |
| } \ |
| if (AA) { \ |
| bmin = (jint) floor(vmin); \ |
| bmax = (jint) ceil(vmax); \ |
| } else { \ |
| bmin = (jint) floor(vmin + 0.5); \ |
| bmax = (jint) floor(vmax + 0.5); \ |
| } \ |
| } while(0) |
| |
| #define PGRAM_INIT_X(starty, x, y, slope) \ |
| (DblToLong((x) + (slope) * ((starty)+0.5 - (y))) + LongOneHalf - 1) |
| |
| /* |
| * Sort parallelogram by y values, ensure that each delta vector |
| * has a non-negative y delta. |
| */ |
| #define SORT_PGRAM(x0, y0, dx1, dy1, dx2, dy2, OTHER_SWAP_CODE) \ |
| do { \ |
| if (dy1 < 0) { \ |
| x0 += dx1; y0 += dy1; \ |
| dx1 = -dx1; dy1 = -dy1; \ |
| } \ |
| if (dy2 < 0) { \ |
| x0 += dx2; y0 += dy2; \ |
| dx2 = -dx2; dy2 = -dy2; \ |
| } \ |
| /* Sort delta vectors so dxy1 is left of dxy2. */ \ |
| if (dx1 * dy2 > dx2 * dy1) { \ |
| double v; \ |
| v = dx1; dx1 = dx2; dx2 = v; \ |
| v = dy1; dy1 = dy2; dy2 = v; \ |
| OTHER_SWAP_CODE \ |
| } \ |
| } while(0) |
| |
| #endif /* ParallelogramUtils_h_Included */ |
