/* Copyright (c) 2009 The Khronos Group Inc.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and/or associated documentation files (the

 * "Materials"), to deal in the Materials without restriction, including

 * without limitation the rights to use, copy, modify, merge, publish,

 * distribute, sublicense, and/or sell copies of the Materials, and to

 * permit persons to whom the Materials are furnished to do so, subject to

 * the following conditions:

 *

 * The above copyright notice and this permission notice shall be included

 * in all copies or substantial portions of the Materials.

 *

 * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY

 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

 * MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.

 */

 #include "owftypes.h"

#ifdef __cplusplus

extern "C" {

#endif

OWFint min(OWFint aLhs, OWFint aRhs)

{

    if (aLhs < aRhs) {

        return aLhs;

    }

    return aRhs;

}

void OWF_Rect_Set(OWF_RECTANGLE* rect,

                  OWFint left,

                  OWFint top,

                  OWFint width,

                  OWFint height)

{

    if (!rect) {

        return;

    }

    rect->x = left;

    rect->y = top;

    rect->width = width;

    rect->height = height;

}

OWFboolean OWF_Rect_Clip(OWF_RECTANGLE* clipped,

                         OWF_RECTANGLE* rect,

                         OWF_RECTANGLE* bounds)

{

    OWFint dw, dh, dx0, dy0, dx1, dy1; /* destination image coordinates */

    OWFint bl, bt, br, bb;

    bl = bounds->x;

    bt = bounds->y;

    br = bl + bounds->width;

    bb = bt + bounds->height;

    dw = rect->width;

    dh = rect->height;

    dx0 = rect->x;

    dy0 = rect->y;

    /* Crop x coords to target image width */

    if (dx0 < bl) {

        dw = dw - (bl - dx0);

        dx0 = bl;

    }

    /* check if destination rectangle is outside target image */

    if (dx0 >= br) {

        return OWF_FALSE;

    }

    /* Crop y coord to target image height */

    if (dy0 < bt) {

        dh = dh - (bt - dy0);

        dy0 = bt;

    }

    /* check if destination rectangle is outside target image */

    if (dy0 >= bb) {

        return OWF_FALSE;

    }

    /* clamp right edge */

    dx1 = dx0 + dw;

    if (dx1 >= br) {

        dx1 = br;

    } else if (dx1 < bl) {

        return OWF_FALSE;

    }

    /* clamp bottom edge */

    dy1 = dy0 + dh;

    if (dy1 >= bb) {

        dy1 = bb;

    } else if (dy1 < bt) {

        return OWF_FALSE;

    }

    clipped->x = dx0;

    clipped->y = dy0;

    clipped->width = dx1 - dx0;

    clipped->height = dy1 - dy0;

    return OWF_TRUE;

}

#ifdef __cplusplus

}

#endif