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166 lines
7.4 KiB
C
166 lines
7.4 KiB
C
/*
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* Copyright (c) 1997, 2003, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* FUNCTIONS
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* mlib_ImageConvCopyEdge - Copy src edges to dst edges
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*
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*
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* SYNOPSIS
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* mlib_status mlib_ImageConvCopyEdge(mlib_image *dst,
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* const mlib_image *src,
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* mlib_s32 dx_l,
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* mlib_s32 dx_r,
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* mlib_s32 dy_t,
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* mlib_s32 dy_b,
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* mlib_s32 cmask)
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*
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* ARGUMENT
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* dst Pointer to an dst image.
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* src Pointer to an src image.
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* dx_l Number of columns on the left side of the
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* image to be copyed.
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* dx_r Number of columns on the right side of the
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* image to be copyed.
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* dy_t Number of rows on the top edge of the
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* image to be copyed.
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* dy_b Number of rows on the top edge of the
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* image to be copyed.
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* cmask Channel mask to indicate the channels to be convolved.
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* Each bit of which represents a channel in the image. The
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* channels corresponded to 1 bits are those to be processed.
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*
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* RESTRICTION
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* The src and the dst must be the same type, same width, same height and have same number
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* of channels (1, 2, 3, or 4). The unselected channels are not
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* overwritten. If both src and dst have just one channel,
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* cmask is ignored.
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*
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* DESCRIPTION
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* Copy src edges to dst edges.
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*
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* The unselected channels are not overwritten.
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* If src and dst have just one channel,
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* cmask is ignored.
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*/
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#include "mlib_image.h"
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#include "mlib_ImageConvEdge.h"
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/***************************************************************/
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#define EDGES(chan, type, mask) \
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{ \
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type *pdst = (type *) mlib_ImageGetData(dst); \
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type *psrc = (type *) mlib_ImageGetData(src); \
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mlib_s32 dst_stride = mlib_ImageGetStride(dst) / sizeof(type); \
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mlib_s32 src_stride = mlib_ImageGetStride(src) / sizeof(type); \
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mlib_s32 i, j, l; \
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mlib_s32 testchan; \
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\
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testchan = 1; \
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for (l = chan - 1; l >= 0; l--) { \
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if ((mask & testchan) == 0) { \
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testchan <<= 1; \
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continue; \
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} \
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testchan <<= 1; \
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for (j = 0; j < dx_l; j++) { \
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for (i = dy_t; i < (img_height - dy_b); i++) { \
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pdst[i*dst_stride + l + j*chan] = psrc[i*src_stride + l + j*chan]; \
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} \
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} \
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for (j = 0; j < dx_r; j++) { \
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for (i = dy_t; i < (img_height - dy_b); i++) { \
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pdst[i*dst_stride + l+(img_width-1 - j)*chan] = \
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psrc[i*src_stride + l+(img_width-1 - j)*chan]; \
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} \
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} \
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for (i = 0; i < dy_t; i++) { \
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for (j = 0; j < img_width; j++) { \
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pdst[i*dst_stride + l + j*chan] = psrc[i*src_stride + l + j*chan]; \
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} \
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} \
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for (i = 0; i < dy_b; i++) { \
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for (j = 0; j < img_width; j++) { \
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pdst[(img_height-1 - i)*dst_stride + l + j*chan] = \
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psrc[(img_height-1 - i)*src_stride + l + j*chan]; \
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} \
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} \
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} \
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}
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/***************************************************************/
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mlib_status mlib_ImageConvCopyEdge(mlib_image *dst,
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const mlib_image *src,
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mlib_s32 dx_l,
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mlib_s32 dx_r,
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mlib_s32 dy_t,
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mlib_s32 dy_b,
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mlib_s32 cmask)
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{
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mlib_s32 img_width = mlib_ImageGetWidth(dst);
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mlib_s32 img_height = mlib_ImageGetHeight(dst);
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mlib_s32 channel = mlib_ImageGetChannels(dst);
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if (dx_l + dx_r > img_width) {
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dx_l = img_width;
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dx_r = 0;
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}
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if (dy_t + dy_b > img_height) {
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dy_t = img_height;
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dy_b = 0;
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}
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if (channel == 1)
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cmask = 1;
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switch (mlib_ImageGetType(src)) {
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case MLIB_BIT:
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return mlib_ImageConvCopyEdge_Bit(dst, src, dx_l, dx_r, dy_t, dy_b, cmask);
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case MLIB_BYTE:
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EDGES(channel, mlib_u8, cmask)
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break;
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case MLIB_SHORT:
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case MLIB_USHORT:
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EDGES(channel, mlib_u16, cmask)
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break;
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case MLIB_INT:
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case MLIB_FLOAT:
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EDGES(channel, mlib_u32, cmask)
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break;
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case MLIB_DOUBLE:
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EDGES(channel, mlib_d64, cmask)
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break;
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default:
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return MLIB_FAILURE;
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}
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return MLIB_SUCCESS;
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}
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/***************************************************************/
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