/*
* 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;
}
/***************************************************************/