Index: src/OGKBitmap.m
==================================================================
--- src/OGKBitmap.m
+++ src/OGKBitmap.m
@@ -130,11 +130,12 @@
 - (void)drawAtPosition: (of_point_t)position
 		 scale: (of_dimension_t)scale
 {
 	al_draw_scaled_bitmap(bitmap, 0, 0, al_get_bitmap_width(bitmap),
 	    al_get_bitmap_height(bitmap), position.x, position.y,
-	    scale.width, scale.height, 0);
+	    scale.width * al_get_bitmap_width(bitmap),
+	    scale.height * al_get_bitmap_height(bitmap), 0);
 }
 
 - (void)drawAtPosition: (of_point_t)position
 		region: (of_rectangle_t)region
 {
@@ -146,11 +147,12 @@
 		region: (of_rectangle_t)region
 		 scale: (of_dimension_t)scale
 {
 	al_draw_scaled_bitmap(bitmap, region.origin.x, region.origin.y,
 	    region.size.width, region.size.height, position.x, position.y,
-	    scale.width, scale.height, 0);
+	    scale.width * al_get_bitmap_width(bitmap),
+	    scale.height * al_get_bitmap_height(bitmap), 0);
 }
 
 - (void)drawAtPosition: (of_point_t)position
 		  tint: (ogk_color_t)tint
 {
@@ -162,11 +164,12 @@
 		 scale: (of_dimension_t)scale
 		  tint: (ogk_color_t)tint
 {
 	al_draw_tinted_scaled_bitmap(bitmap, ogk_color_to_allegro(tint),
 	    0, 0, al_get_bitmap_width(bitmap), al_get_bitmap_height(bitmap),
-	    position.x, position.y, scale.width, scale.height, 0);
+	    position.x, position.y, scale.width * al_get_bitmap_width(bitmap),
+	    scale.height * al_get_bitmap_height(bitmap), 0);
 }
 
 - (void)drawAtPosition: (of_point_t)position
 		region: (of_rectangle_t)region
 		  tint: (ogk_color_t)tint
@@ -181,14 +184,15 @@
 		 scale: (of_dimension_t)scale
 		  tint: (ogk_color_t)tint
 {
 	al_draw_tinted_scaled_bitmap(bitmap, ogk_color_to_allegro(tint),
 	    region.origin.x, region.origin.y, region.size.width,
-	    region.size.height, position.x, position.y, scale.width,
-	    scale.height, 0);
+	    region.size.height, position.x, position.y,
+	    scale.width * al_get_bitmap_width(bitmap),
+	    scale.height * al_get_bitmap_height(bitmap), 0);
 }
 
 - (ALLEGRO_BITMAP*)OGK_allegroBitmap
 {
 	return bitmap;
 }
 @end

Index: tests/TestMain.m
==================================================================
--- tests/TestMain.m
+++ tests/TestMain.m
@@ -71,12 +71,13 @@
 	    event.cursor.y, event.deltaCursor.y,
 	    event.wheel.x, event.deltaWheel.x,
 	    event.wheel.y, event.deltaWheel.y);
 
 	position = event.cursor;
-	scale = of_dimension(bitmap.size.width + event.wheel.x,
-	    bitmap.size.height + event.wheel.y);
+	scale = of_dimension(
+	    (bitmap.size.width + event.wheel.x) / bitmap.size.width,
+	    (bitmap.size.height + event.wheel.y) / bitmap.size.height);
 }
 
 - (void)mouseButtonWasPressed: (OGKMouseButtonPressedEvent*)event
 		      display: (OGKDisplay*)display
 {
@@ -131,11 +132,11 @@
 	[eventQueue registerKeyboard];
 	[eventQueue registerMouse];
 
 	bitmap = [[OGKBitmap alloc] initWithFile: @"test.bmp"];
 	position = of_point(display.size.width / 2, display.size.height / 2);
-	scale = bitmap.size;
+	scale = of_dimension(1, 1);
 	tint = ogk_color(1, 1, 1, 0);
 
 	for (running = YES; running;) {
 		@autoreleasepool {
 			[self handleEvents];