Moved code to new graphic_utils.c/.h header and added Rect wrapper struct

2025-07-09 04:59:19 +03:00
parent 2aaee73bac
commit b822d2b365
5 changed files with 58 additions and 32 deletions
@@ -0,0 +1,36 @@
+#ifndef GRAPHIC_UTILS_H
+#define GRAPHIC_UTILS_H
+
+/* Reminder:
+ *  Screen Base Block is the base for the screenblock entries i.e. tilemap
+ *  Character Base Block is the base for the tiles themselves
+ */
+#define MAIN_BG_SBB 31 
+#define MAIN_BG_CBB 1
+#define TTE_SBB 30
+#define TTE_CBB 0
+#define AFFINE_BG_SBB 2
+#define AFFINE_BG_CBB 2
+
+/* A 1024 size screenblock is arranged in a grid of 32x32 block entries
+ * Interestingly since each block is 8x8 pixels, the 240x160 GBA screen
+ * is smaller than the screenblock, only the top left part of the screenblock
+ * is displayed on the screen.
+ */
+#define SCREENBLOCK_ROW_LEN 32
+
+typedef struct
+{
+	int left;
+	int top;
+	int right;
+	int bottom;
+} Rect;
+
+/* Clears a rect in the main background screenblock.
+ * The rect needs to be in screenblocks
+ */
+void main_bg_se_clear_rect(Rect rect);
+
+
+#endif //GRAPHIC_UTILS_H