/*

 * Copyright (c) 2003, 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.

 */

/*

 * FUNCTIONS

 *      mlib_c_ImageConvClearEdge  - Set edge of an image to a specific

 *                                        color. (for float-point image)

 *

 * SYNOPSIS

 *      mlib_status mlib_c_ImageConvClearEdge_Fp(mlib_image     *img,

 *                                               mlib_s32       dx_l,

 *                                               mlib_s32       dx_r,

 *                                               mlib_s32       dy_t,

 *                                               mlib_s32       dy_b,

 *                                               const mlib_d64 *color,

 *                                               mlib_s32       cmask)

 *

 * ARGUMENT

 *      img       Pointer to an image.

 *      dx_l      Number of columns on the left side of the

 *                image to be cleared.

 *      dx_r      Number of columns on the right side of the

 *                image to be cleared.

 *      dy_t      Number of rows on the top edge of the

 *                image to be cleared.

 *      dy_b      Number of rows on the top edge of the

 *                image to be cleared.

 *      color     Pointer to the color that the edges are set to.

 *      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

 *      img can have 1, 2, 3 or 4 channels of MLIB_FLOAT or MLIB_DOUBLE

 *      data type.

 *

 * DESCRIPTION

 *      Set edge of an image to a specific color.

 *      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 *pimg = (type *) mlib_ImageGetData(img);                           \

  type color_i;                                                           \

  mlib_s32 img_stride = mlib_ImageGetStride(img) / 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;                                                       \

    color_i = (type) color[l];                                            \

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

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

        pimg[i * img_stride + l + j * chan] = color_i;                    \

      }                                                                   \

    }                                                                     \

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

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

        pimg[i * img_stride + l + (img_width - 1 - j) * chan] = color_i;  \

      }                                                                   \

    }                                                                     \

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

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

        pimg[i * img_stride + l + j * chan] = color_i;                    \

      }                                                                   \

    }                                                                     \

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

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

        pimg[(img_height - 1 - i) * img_stride + l + j * chan] = color_i; \

      }                                                                   \

    }                                                                     \

  }                                                                       \

}

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

mlib_status mlib_ImageConvClearEdge_Fp(mlib_image     *img,

                                       mlib_s32       dx_l,

                                       mlib_s32       dx_r,

                                       mlib_s32       dy_t,

                                       mlib_s32       dy_b,

                                       const mlib_d64 *color,

                                       mlib_s32       cmask)

{

  mlib_s32 img_width  = mlib_ImageGetWidth(img);

  mlib_s32 img_height = mlib_ImageGetHeight(img);

  mlib_s32 channel    = mlib_ImageGetChannels(img);

  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(img)) {

    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;

}

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