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/*
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* Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#ifndef ParallelogramUtils_h_Included
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#define ParallelogramUtils_h_Included
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define PGRAM_MIN_MAX(bmin, bmax, v0, dv1, dv2, AA) \
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do { \
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double vmin, vmax; \
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if (dv1 < 0) { \
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vmin = v0+dv1; \
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vmax = v0; \
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} else { \
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vmin = v0; \
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vmax = v0+dv1; \
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} \
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if (dv2 < 0) { \
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vmin += dv2; \
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} else { \
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vmax += dv2; \
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} \
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if (AA) { \
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bmin = (jint) floor(vmin); \
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bmax = (jint) ceil(vmax); \
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} else { \
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bmin = (jint) floor(vmin + 0.5); \
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bmax = (jint) floor(vmax + 0.5); \
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} \
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} while(0)
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#define PGRAM_INIT_X(starty, x, y, slope) \
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(DblToLong((x) + (slope) * ((starty)+0.5 - (y))) + LongOneHalf - 1)
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/*
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* Sort parallelogram by y values, ensure that each delta vector
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* has a non-negative y delta.
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*/
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#define SORT_PGRAM(x0, y0, dx1, dy1, dx2, dy2, OTHER_SWAP_CODE) \
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do { \
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if (dy1 < 0) { \
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x0 += dx1; y0 += dy1; \
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dx1 = -dx1; dy1 = -dy1; \
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} \
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if (dy2 < 0) { \
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x0 += dx2; y0 += dy2; \
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dx2 = -dx2; dy2 = -dy2; \
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} \
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/* Sort delta vectors so dxy1 is left of dxy2. */ \
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if (dx1 * dy2 > dx2 * dy1) { \
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double v; \
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v = dx1; dx1 = dx2; dx2 = v; \
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v = dy1; dy1 = dy2; dy2 = v; \
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OTHER_SWAP_CODE \
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} \
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} while(0)
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#endif /* ParallelogramUtils_h_Included */
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