/*

 * Copyright 2003 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

/*

 * FUNCTIONS

 *      mlib_ImageConvCopyEdge_Fp  - Copy src edges  to dst edges

 *

 *

 * SYNOPSIS

 *      mlib_status mlib_ImageConvCopyEdge_Fp(mlib_image       *dst,

 *                                            const mlib_image *src,

 *                                            mlib_s32         dx_l,

 *                                            mlib_32          dx_r,

 *                                            mlib_s32         dy_t,

 *                                            mlib_32          dy_b,

 *                                            mlib_s32         cmask);

 *

 * ARGUMENT

 *      dst       Pointer to an dst image.

 *      src       Pointer to an src image.

 *      dx_l      Number of columns on the left side of the

 *                image to be copyed.

 *      dx_r      Number of columns on the right side of the

 *                image to be copyed.

 *      dy_t      Number of rows on the top edge of the

 *                image to be copyed.

 *      dy_b      Number of rows on the top edge of the

 *                image to be copyed.

 *      cmask     Channel mask to indicate the channels to be convolved.

 *                Each bit of which represents a channel in the image. The

 *                channels corresponded to 1 bits are those to be processed.

 *

 * RESTRICTION

 *      The src and the dst must be the same type, same width, same height and have same number

 *      of channels (1, 2, 3, or 4). The unselected channels are not

 *      overwritten. If both src and dst have just one channel,

 *      cmask is ignored.

 *

 * DESCRIPTION

 *      Copy src edges  to dst edges.

 *

 *      The unselected channels are not overwritten.

 *      If src and dst have just one channel,

 *      cmask is ignored.

 */

#include "mlib_image.h"

#include "mlib_ImageConvEdge.h"

/***************************************************************/

#define EDGES(chan, type, mask)                                   \

{                                                                 \

  type *pdst = (type *) mlib_ImageGetData(dst);                   \

  type *psrc = (type *) mlib_ImageGetData(src);                   \

  mlib_s32 dst_stride = mlib_ImageGetStride(dst) / sizeof(type);  \

  mlib_s32 src_stride = mlib_ImageGetStride(src) / sizeof(type);  \

  mlib_s32 i, j, l;                                               \

  mlib_s32 testchan;                                              \

                                                                  \

  testchan = 1;                                                   \

  for (l = chan - 1; l >= 0; l--) {                               \

    if ((mask & testchan) == 0) {                                 \

      testchan <<= 1;                                             \

      continue;                                                   \

    }                                                             \

    testchan <<= 1;                                               \

    for (j = 0; j < dx_l; j++) {                                  \

      for (i = dy_t; i < (img_height - dy_b); i++) {              \

        pdst[i * dst_stride + l + j * chan] =                     \

          psrc[i * src_stride + l + j * chan];                    \

      }                                                           \

    }                                                             \

    for (j = 0; j < dx_r; j++) {                                  \

      for (i = dy_t; i < (img_height - dy_b); i++) {              \

        pdst[i * dst_stride + l + (img_width - 1 - j) * chan] =   \

          psrc[i * src_stride + l + (img_width - 1 - j) * chan];  \

      }                                                           \

    }                                                             \

    for (i = 0; i < dy_t; i++) {                                  \

      for (j = 0; j < img_width; j++) {                           \

        pdst[i * dst_stride + l + j * chan] =                     \

          psrc[i * src_stride + l + j * chan];                    \

      }                                                           \

    }                                                             \

    for (i = 0; i < dy_b; i++) {                                  \

      for (j = 0; j < img_width; j++) {                           \

        pdst[(img_height - 1 - i) * dst_stride + l + j * chan] =  \

          psrc[(img_height - 1 - i) * src_stride + l + j * chan]; \

      }                                                           \

    }                                                             \

  }                                                               \

}

/***************************************************************/

mlib_status mlib_ImageConvCopyEdge_Fp(mlib_image       *dst,

                                      const mlib_image *src,

                                      mlib_s32         dx_l,

                                      mlib_s32         dx_r,

                                      mlib_s32         dy_t,

                                      mlib_s32         dy_b,

                                      mlib_s32         cmask)

{

  mlib_s32 img_width  = mlib_ImageGetWidth(dst);

  mlib_s32 img_height = mlib_ImageGetHeight(dst);

  mlib_s32 channel    = mlib_ImageGetChannels(dst);

  if (dx_l + dx_r > img_width) {

    dx_l = img_width;

    dx_r = 0;

  }

  if (dy_t + dy_b > img_height) {

    dy_t = img_height;

    dy_b = 0;

  }

  if (channel == 1) cmask = 1;

  switch (mlib_ImageGetType(src)) {

    case MLIB_FLOAT:

      EDGES(channel,mlib_f32, cmask)

      break;

    case MLIB_DOUBLE:

      EDGES(channel,mlib_d64, cmask)

      break;

    default:

      return MLIB_FAILURE;

  }

  return MLIB_SUCCESS;

}

/***************************************************************/