use pixman images for storage

1 files changed, 27 insertions, 0 deletions

diff --git a/readers.c b/readers.c
index 53cb032..b7da842 100644
--- a/readers.c
+++ b/readers.c
@@ -2,6 +2,7 @@
 #include <stdlib.h>
 #include <stddef.h>
 #include <string.h>
+#include <assert.h>
 
 #include "readers.h"
 
@@ -126,6 +127,32 @@ int load_free_extras(struct ida_image_info *info)
 
 /* ----------------------------------------------------------------------- */
 
+void ida_image_alloc(struct ida_image *img)
+{
+    assert(img->p == NULL);
+    img->p = pixman_image_create_bits(PIXMAN_r8g8b8,
+                                      img->i.width, img->i.height, NULL, 0);
+}
+
+uint8_t *ida_image_scanline(struct ida_image *img, int y)
+{
+    uint8_t *scanline;
+
+    assert(img->p != NULL);
+    scanline  = (void*)pixman_image_get_data(img->p);
+    scanline += pixman_image_get_stride(img->p) * y;
+    return scanline;
+}
+
+void ida_image_free(struct ida_image *img)
+{
+    assert(img->p != NULL);
+    pixman_image_unref(img->p);
+    img->p = NULL;
+}
+
+/* ----------------------------------------------------------------------- */
+
 LIST_HEAD(loaders);
 
 void load_register(struct ida_loader *loader)