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//
// Copyright 2006 by Johannes Hofmann
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
extern "C" {
#include <jpeglib.h>
}
#include "JPEGOutputImage.H"
JPEGOutputImage::JPEGOutputImage(const char *f, int q) {
file = strdup(f);
fp = NULL;
row = NULL;
quality = q;
}
JPEGOutputImage::~JPEGOutputImage() {
if (row) {
free(row);
}
if (file) {
free(file);
}
}
int
JPEGOutputImage::init_internal(int w1, int h1) {
if (row) {
free(row);
row = NULL;
}
row = (unsigned char*) malloc(sizeof(char) * 3 * W);
if (!row) {
perror("malloc");
return 1;
}
memset(row, 0, sizeof(char) * 3 * W);
if (fp) {
fclose(fp);
}
if ((fp = fopen(file, "wb")) == NULL) {
fprintf(stderr, "can't open %s\n", file);
return 1;
}
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
jpeg_stdio_dest(&cinfo, fp);
cinfo.image_width = W;
cinfo.image_height = H;
cinfo.input_components = 3; /* # of color components per pixel */
cinfo.in_color_space = JCS_RGB;
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, quality, TRUE);
jpeg_start_compress(&cinfo, TRUE);
}
int
JPEGOutputImage::set_pixel_internal(int x, char r, char g, char b) {
row[x*3+0] = r;
row[x*3+1] = g;
row[x*3+2] = b;
return 0;
}
int
JPEGOutputImage::next_line_internal() {
JSAMPROW row_pointer[1];
row_pointer[0] = row;
jpeg_write_scanlines(&cinfo, row_pointer, 1);
memset(row, 0, sizeof(char) * 3 * W);
return 0;
}
int
JPEGOutputImage::done_internal() {
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
if (fp) {
fclose(fp);
fp = NULL;
}
if (row) {
free(row);
}
if (fp) {
fclose(fp);
fp = NULL;
}
return 0;
}
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