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#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <jpeglib.h>
#include "loader.h"
#ifdef USE_X11
# include <X11/Xlib.h>
# include <X11/Intrinsic.h>
# include <Xm/Xm.h>
# include <Xm/Text.h>
# include <Xm/SelectioB.h>
# include "RegEdit.h"
# include "ida.h"
# include "viewer.h"
#endif
/* ---------------------------------------------------------------------- */
/* load */
struct jpeg_state {
FILE * infile; /* source file */
struct jpeg_decompress_struct cinfo;
struct jpeg_error_mgr jerr;
JSAMPARRAY buffer; /* Output row buffer */
int row_stride,linelength; /* physical row width in output buffer */
unsigned char *image,*ptr;
};
static void*
jpeg_init(FILE *fp, char *filename, struct ida_image_info *i)
{
struct jpeg_state *h;
h = malloc(sizeof(*h));
memset(h,0,sizeof(*h));
h->infile = fp;
h->cinfo.err = jpeg_std_error(&h->jerr);
jpeg_create_decompress(&h->cinfo);
jpeg_stdio_src(&h->cinfo, h->infile);
jpeg_read_header(&h->cinfo, TRUE);
h->cinfo.out_color_space = JCS_RGB;
jpeg_start_decompress(&h->cinfo);
i->width = h->cinfo.output_width;
i->height = h->cinfo.output_height;
switch (h->cinfo.density_unit) {
case 0: /* unknown */
break;
case 1: /* dot per inch */
i->dpi = h->cinfo.X_density;
break;
case 2: /* dot per cm */
i->dpi = res_cm_to_inch(h->cinfo.X_density);
break;
}
return h;
}
static void
jpeg_read(unsigned char *dst, int line, void *data)
{
struct jpeg_state *h = data;
JSAMPROW row = dst;
jpeg_read_scanlines(&h->cinfo, &row, 1);
}
static void
jpeg_done(void *data)
{
struct jpeg_state *h = data;
jpeg_destroy_decompress(&h->cinfo);
fclose(h->infile);
free(h);
}
struct ida_loader jpeg_loader = {
magic: "\xff\xd8",
moff: 0,
mlen: 2,
name: "libjpeg",
init: jpeg_init,
read: jpeg_read,
done: jpeg_done,
};
#ifdef USE_X11
/* ---------------------------------------------------------------------- */
/* save */
static Widget jpeg_shell;
static Widget jpeg_text;
static int jpeg_quality = 75;
static void
jpeg_button_cb(Widget widget, XtPointer clientdata, XtPointer call_data)
{
XmSelectionBoxCallbackStruct *cb = call_data;
if (XmCR_OK == cb->reason) {
jpeg_quality = atoi(XmTextGetString(jpeg_text));
do_save_print();
}
XtUnmanageChild(jpeg_shell);
}
static int
jpeg_conf(Widget parent, struct ida_image *img)
{
char tmp[32];
if (!jpeg_shell) {
/* build dialog */
jpeg_shell = XmCreatePromptDialog(parent,"jpeg",NULL,0);
XmdRegisterEditres(XtParent(jpeg_shell));
XtUnmanageChild(XmSelectionBoxGetChild(jpeg_shell,XmDIALOG_HELP_BUTTON));
jpeg_text = XmSelectionBoxGetChild(jpeg_shell,XmDIALOG_TEXT);
XtAddCallback(jpeg_shell,XmNokCallback,jpeg_button_cb,NULL);
XtAddCallback(jpeg_shell,XmNcancelCallback,jpeg_button_cb,NULL);
}
sprintf(tmp,"%d",jpeg_quality);
XmTextSetString(jpeg_text,tmp);
XtManageChild(jpeg_shell);
return 0;
}
static int
jpeg_write(FILE *fp, struct ida_image *img)
{
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
unsigned char *line;
int i;
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
jpeg_stdio_dest(&cinfo, fp);
cinfo.image_width = img->i.width;
cinfo.image_height = img->i.height;
if (img->i.dpi) {
cinfo.density_unit = 1;
cinfo.X_density = img->i.dpi;
cinfo.Y_density = img->i.dpi;
}
cinfo.input_components = 3;
cinfo.in_color_space = JCS_RGB;
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, jpeg_quality, TRUE);
jpeg_start_compress(&cinfo, TRUE);
for (i = 0, line = img->data; i < img->i.height; i++, line += img->i.width*3)
jpeg_write_scanlines(&cinfo, &line, 1);
jpeg_finish_compress(&(cinfo));
jpeg_destroy_compress(&(cinfo));
return 0;
}
struct ida_writer jpeg_writer = {
label: "JPEG",
ext: { "jpg", "jpeg", NULL},
write: jpeg_write,
conf: jpeg_conf,
};
#endif
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