Initial revision

1 files changed, 85 insertions, 0 deletions

diff --git a/rd/magick.c b/rd/magick.c
new file mode 100644
index 0000000..f17e5e3
--- /dev/null
+++ b/rd/magick.c
@@ -0,0 +1,85 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <magick/api.h>
+
+#include "loader.h"
+#include "viewer.h"
+
+extern char *binary;
+
+static int first = 1;
+static ExceptionInfo exception;
+
+struct magick_state {
+    ImageInfo *image_info;
+    Image *image;
+};
+
+static void*
+magick_init(FILE *fp, char *filename, int *width, int *height)
+{
+    struct magick_state *h;
+
+    /* libmagick wants a filename */
+    fclose(fp);
+
+    if (first) {
+	/* init library first time */
+	MagickIncarnate(binary);
+	GetExceptionInfo(&exception);
+	first = 0;
+    }
+    
+    h = malloc(sizeof(*h));
+    memset(h,0,sizeof(*h));
+
+    h->image_info=CloneImageInfo(NULL);
+    strcpy(h->image_info->filename,filename);
+    h->image = ReadImage(h->image_info,&exception);
+    if (NULL == h->image) {
+	MagickError(exception.severity,exception.reason,exception.description);
+	goto oops;
+    }
+
+    *width  = h->image->rows;
+    *height = h->image->columns;
+    return h;
+
+ oops:
+    if (h->image)
+	DestroyImage(h->image);
+    if (h->image_info)
+	DestroyImageInfo(h->image_info);
+    free(h);
+    return NULL;
+}
+
+static void
+magick_read(unsigned char *dst, int line, void *data)
+{
+    struct magick_state *h = data;
+    DispatchImage (h->image,0,line,h->image->columns, 1,
+		   "RGB", 0, data);
+}
+
+static void
+magick_done(void *data)
+{
+    struct magick_state *h = data;
+
+    DestroyImageInfo(h->image_info);
+    DestroyImage(h->image);
+    free(h);
+}
+
+static struct ida_loader magick_loader = {
+    name:  "libmagick",
+    init:  magick_init,
+    read:  magick_read,
+    done:  magick_done,
+};
+
+static void __init init_rd(void)
+{
+    load_register(&magick_loader);
+}