s/rgb_frame/fb/, add oam_cache, fix several instructions

1 files changed, 18 insertions, 4 deletions

diff --git a/gb.h b/gb.h
index 15bd75e..e027ee7 100644
--- a/gb.h
+++ b/gb.h
@@ -25,8 +25,8 @@ typedef enum {
 #define GB_BTN_SELECT (1 << 6)
 #define GB_BTN_START  (1 << 7)
 
-// frame size, in bytes
-#define GB_FRAME_SIZE (3 * 160 * 144)
+// frame buffer size, in bytes
+#define GB_FB_SIZE (3 * 160 * 144)
 
 typedef struct gb_t_ gb_t;
 
@@ -116,8 +116,22 @@ struct gb_t_ {
             obp1,
             line,
             lyc;
-    uint8_t rgb[GB_FRAME_SIZE];
+
+    // frame buffer
+    uint8_t fb[GB_FB_SIZE];
+
+    // frame counter
     uint32_t frame;
+
+    struct {
+      uint8_t x, y, tile;
+      bool priority,
+           y_flip,
+           x_flip,
+           palette;
+    } oam_cache[40];
+
+    bool oam_dirty;
   } gpu;
 
   struct {
@@ -148,7 +162,7 @@ void gb_set_buttons(gb_t * const, const uint8_t);
 void gb_frame(gb_t * const);
 void gb_step(gb_t * const);
 _Bool gb_disasm(gb_t * const, char * const, size_t * const);
-const uint8_t *gb_get_rgb_frame(const gb_t * const);
+const uint8_t *gb_get_frame(const gb_t * const);
 
 #ifdef __cplusplus
 };