/*

 * 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 */