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/* imagetypes.c:
*
* this contains things which reference the global ImageTypes array
*
* jim frost 09.27.89
*
* Copyright 1989, 1991 Jim Frost.
* See included file "copyright.h" for complete copyright information.
*/
#include "copyright.h"
#include "image.h"
#include "imagetypes.h"
#include "options.h"
#include <errno.h>
/* SUPPRESS 560 */
extern int findImage(char *name, char *fullname);
/* load a named image
*/
Image *loadImage(globalopts, options, name, verbose)
OptionSet *globalopts;
OptionSet *options;
char *name;
unsigned int verbose;
{ char fullname[BUFSIZ];
Option *opt;
Image *image;
int a;
if (findImage(name, fullname) < 0) {
if (errno == ENOENT)
fprintf(stderr, "%s: image not found\n", name);
else
perror(fullname);
return(NULL);
}
/* see if there's a "type" option and use it if there is
*/
if (! (opt= getOption(globalopts, TYPE)))
opt= getOption(options, TYPE);
if (opt) {
for (a= 0; ImageTypes[a].loader; a++)
if (!strncmp(ImageTypes[a].type, opt->info.type, strlen(opt->info.type))) {
if ((image= ImageTypes[a].loader(fullname, name, verbose))) {
zreset(NULL);
/* this converts a 1-bit RGB image to a bitmap prior to blitting
* it across. it's a transmission efficiency hack, and has the
* beneficial side-effect of eliminating dithering on RGB images
* that don't really need it.
*/
if (RGBP(image) && (image->rgb.used <= 2)) {
Image *new_image;
new_image = flatten(image);
if (new_image != image) {
freeImage(image);
image = new_image;
}
}
return(image);
}
fprintf(stderr, "%s does not look like a \"%s\" image (skipping).\n",
fullname, opt->info.type);
zreset(NULL);
return(NULL);
}
fprintf(stderr, "\"%s\" is not a supported image type (will try to guess the type)\n", opt->info.type);
/* fall through into the type determination loop
*/
}
/* try to pick out the image type
*/
for (a= 0; ImageTypes[a].loader; a++) {
debug(("Checking %s against loader for %s\n", fullname, ImageTypes[a].name));
if ((image= ImageTypes[a].loader(fullname, name, verbose))) {
zreset(NULL);
/* this does the 1-bit conversion as above.
*/
if (RGBP(image) && (image->rgb.used <= 2)) {
Image *new_image;
new_image = flatten(image);
if (new_image != image) {
freeImage(image);
image = new_image;
}
}
return(image);
}
}
fprintf(stderr, "%s: unknown or unsupported image type\n", fullname);
zreset(NULL);
return(NULL);
}
/* identify what kind of image a named image is
*/
void identifyImage(name)
char *name;
{ char fullname[BUFSIZ];
int a;
if (findImage(name, fullname) < 0) {
if (errno == ENOENT)
fprintf(stderr, "%s: image not found\n", name);
else
perror(fullname);
return;
}
for (a= 0; ImageTypes[a].identifier; a++) {
if (ImageTypes[a].identifier(fullname, name)) {
zreset(NULL);
return;
}
}
zreset(NULL);
fprintf(stderr, "%s: unknown or unsupported image type\n", fullname);
}
/* dump an image into an image file of the specified type
*/
void dumpImage(image, type, filename, verbose)
Image *image;
char *type;
char *filename;
int verbose;
{ int a;
char typename[32];
char *optptr;
/* find options if there are any
*/
optptr = index(type, ',');
if (optptr) {
strncpy(typename, type, optptr - type);
typename[optptr - type] = '\0';
optptr++; /* skip comma */
}
else
{
strncpy(typename, type, 31);
typename[31] = '\0';
}
for (a= 0; ImageTypes[a].loader; a++)
if (!strncmp(ImageTypes[a].type, typename, strlen(typename))) {
if (ImageTypes[a].dumper)
ImageTypes[a].dumper(image, optptr, filename, verbose);
else
fprintf(stderr, "\
%s: I can read this image type but cannot write it (sorry).\n\
If you need a list of supported image types, use the -supported option.\n",
type);
return;
}
fprintf(stderr, "\
%s: unknown or unsupported image type. If you need a list\n\
of supported image types, use the -supported option.\n", type);
}
/* tell user what image types we support
*/
void supportedImageTypes()
{ int a;
printf("Type Name Can Dump Description\n");
printf("---------- -------- -----------\n");
for (a= 0; ImageTypes[a].name; a++)
printf("%-10s %-8s %s\n", ImageTypes[a].type,
(ImageTypes[a].dumper ? "Yes" : "No"),
ImageTypes[a].name);
}
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