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#include "thumbnail.h"
#include <magick/api.h>
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
/* http://www.graphicsmagick.org/api/api.html */
int thumbnail_create(const char *const src, const char *const dst)
{
int ret = -1;
const size_t slen = strlen(src), dlen = strlen(dst);
ImageInfo *info = NULL;
Image *i = NULL, *t = NULL;
ExceptionInfo exc;
InitializeMagick(NULL);
GetExceptionInfo(&exc);
if (slen >= sizeof i->filename)
{
fprintf(stderr, "%s: src maximum length exceeded (%zu, max %zu)\n",
__func__, slen, sizeof i->filename - 1);
goto end;
}
else if (dlen >= sizeof t->filename)
{
fprintf(stderr, "%s: dst maximum length exceeded (%zu, max %zu)\n",
__func__, slen, sizeof t->filename - 1);
goto end;
}
else if (!(info = CloneImageInfo(NULL)))
{
fprintf(stderr, "%s: CloneImageInfo failed\n", __func__);
goto end;
}
strcpy(info->filename, src);
info->adjoin = MagickTrue;
if (!(i = ReadImage(info, &exc)))
{
if (exc.severity == MissingDelegateError)
/* Non-image file format. */
ret = 1;
else
fprintf(stderr, "%s: ReadImage failed: "
"reason: %s, description: %s\n",
__func__, exc.reason, exc.description);
goto end;
}
const unsigned long y = i->rows > THUMBNAIL_HEIGHT ?
THUMBNAIL_HEIGHT : i->rows,
x = y * i->columns / i->rows;
if (!(t = ResizeImage(i, x, y, PointFilter, 1, &exc)))
{
fprintf(stderr, "%s: ResizeImage failed, "
"reason: %s, description: %s\n",
__func__, exc.reason, exc.description);
goto end;
}
else if (WriteImages(info, t, dst, &exc) != MagickPass)
{
fprintf(stderr, "%s: WriteImages failed, "
"reason: %s, description: %s\n",
__func__, exc.reason, exc.description);
goto end;
}
ret = 0;
end:
DestroyImageInfo(info);
DestroyImage(i);
DestroyImage(t);
DestroyExceptionInfo(&exc);
DestroyMagick();
return ret;
}
bool thumbnail_configured(void)
{
return true;
}
int thumbnail_dim(const char *const path, struct thumbnail_dim *const d)
{
int ret = -1;
const size_t slen = strlen(path);
ImageInfo *info = NULL;
Image *i = NULL;
ExceptionInfo exc;
InitializeMagick(NULL);
GetExceptionInfo(&exc);
if (slen >= sizeof i->filename)
{
fprintf(stderr, "%s: src maximum length exceeded (%zu, max %zu)\n",
__func__, slen, sizeof i->filename - 1);
goto end;
}
else if (!(info = CloneImageInfo(NULL)))
{
fprintf(stderr, "%s: CloneImageInfo failed\n", __func__);
goto end;
}
strcpy(info->filename, path);
info->adjoin = MagickTrue;
if (!(i = ReadImage(info, &exc)))
{
if (exc.severity == MissingDelegateError)
/* Non-image file format. */
ret = 1;
else
fprintf(stderr, "%s: ReadImage failed: "
"reason: %s, description: %s\n",
__func__, exc.reason, exc.description);
goto end;
}
*d = (const struct thumbnail_dim)
{
.w = i->columns,
.h = i->rows
};
ret = 0;
end:
DestroyImageInfo(info);
DestroyImage(i);
DestroyExceptionInfo(&exc);
DestroyMagick();
return ret;
}
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