Create Subversion repository

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@1 9d0c8265-081b-0410-96cb-a4ca84ce46f8

1 files changed, 116 insertions, 0 deletions

diff --git a/converter/other/pamtosvg/bitmap.c b/converter/other/pamtosvg/bitmap.c
new file mode 100644
index 00000000..1a00e748
--- /dev/null
+++ b/converter/other/pamtosvg/bitmap.c
@@ -0,0 +1,116 @@
+/* bitmap.c: operations on bitmaps. */
+
+#include <string.h>
+
+#include "mallocvar.h"
+
+#include "bitmap.h"
+
+at_bitmap_type *
+at_bitmap_new(unsigned short width,
+              unsigned short height,
+              unsigned int planes) {
+
+    at_bitmap_type * bitmap;
+
+    MALLOCVAR_NOFAIL(bitmap); 
+
+    *bitmap = at_bitmap_init(NULL, width, height, planes);
+
+    return bitmap;
+}
+
+
+
+at_bitmap_type *
+at_bitmap_copy(at_bitmap_type * src)
+{
+    at_bitmap_type * dist;
+    unsigned short width, height, planes;
+
+    width  = at_bitmap_get_width(src);
+    height = at_bitmap_get_height(src);
+    planes = at_bitmap_get_planes(src);
+    
+    dist = at_bitmap_new(width, height, planes);
+    memcpy(dist->bitmap, 
+           src->bitmap, 
+           width * height * planes * sizeof(unsigned char));
+    return dist;
+}
+
+
+
+at_bitmap_type
+at_bitmap_init(unsigned char * area,
+               unsigned short width,
+               unsigned short height,
+               unsigned int planes) {
+
+    at_bitmap_type bitmap;
+    
+    if (area)
+        bitmap.bitmap = area;
+    else {
+        if (width * height == 0)
+            bitmap.bitmap = NULL;
+        else {
+            MALLOCARRAY(bitmap.bitmap, width * height * planes);
+            if (bitmap.bitmap == NULL)
+                pm_error("Unable to allocate %u x %u x %u bitmap array",
+                         width, height, planes);
+            bzero(bitmap.bitmap,
+                  width * height * planes * sizeof(unsigned char));
+        }
+    }
+    
+    bitmap.width  = width;
+    bitmap.height = height;
+    bitmap.np     =  planes;
+
+    return bitmap;  
+}
+
+void 
+at_bitmap_free (at_bitmap_type * bitmap)
+{
+    free_bitmap (bitmap);
+    free(bitmap);
+}
+
+unsigned short
+at_bitmap_get_width (at_bitmap_type * bitmap)
+{
+    return bitmap->width;
+}
+
+unsigned short
+at_bitmap_get_height (at_bitmap_type * bitmap)
+{
+    return bitmap->height;
+}
+
+unsigned short
+at_bitmap_get_planes (at_bitmap_type * bitmap)
+{
+    return bitmap->np;
+}
+
+
+
+bitmap_type
+new_bitmap (unsigned short width, unsigned short height)
+{
+    return at_bitmap_init(NULL,width,height,1);
+}
+
+/* Free the storage that is allocated for a bitmap.  On the other hand,
+   the bitmap might not have any storage allocated for it if it is zero
+   in either dimension; in that case, don't free it.  */
+
+void
+free_bitmap (bitmap_type *b)
+{
+    if (b->bitmap != NULL)
+        free (b->bitmap);
+}