Initial commit

1 files changed, 66 insertions, 0 deletions

diff --git a/arm9/source/devices/screen.h b/arm9/source/devices/screen.h
new file mode 100644
index 0000000..a406051
--- /dev/null
+++ b/arm9/source/devices/screen.h
@@ -0,0 +1,66 @@
+#ifndef SCREEN_H_
+    #define SCREEN_H_
+
+    #define PIXELS_WIDTH  256
+    #define PIXELS_HEIGHT 192
+    #define PIXELS_SIZE   49152
+    #define TILES_WIDTH   32
+    #define TILES_HEIGHT  24
+    #define TILES_SIZE    768
+    #define TILES_MEM     24576  // size of a screen layer in bytes
+
+    #define BG_SLOT_VIS 0  // tile base for visible background tiles
+    #define FG_SLOT_VIS 2  // tile base for visible foreground tiles
+    #define BG_SLOT 4      // tile base for background tiles
+    #define FG_SLOT 6      // tile base for foreground tiles
+    #define MAP_SLOT 12    // map base for tile map
+
+    typedef struct {
+        u8 mem[16];           // buffer memory
+        u8 p;                 // buffer pointer
+        u8 sprite[8][8];      // transformed sprite
+        bool cached;          // true if sprite has been transformed
+        u8 draw;              // the cached draw byte
+    } SpriteBuffer;
+
+    typedef struct {
+        u16 *bgv, *fgv;       // visible tile memory
+        u16 *bg, *fg;         // tile memory
+        u16 *map;             // tile map
+        u16 *pal;             // colour palette
+    } Screen;
+
+    typedef struct {
+        u16 x,y;              // cursor position
+        u16 px,py;            // previous cursor position
+        u16 colours;          // sprite colours
+        SpriteBuffer sprite;  // sprite buffer
+        u16 palette_write;    // palette write cache
+        u16 palette[16];      // palette as RGB15 colours
+        Screen *nds;          // NDS VRAM pointers
+        bool wake;            // wake flag
+        bool dirty;           // dirty flag
+    } ScreenDevice;
+
+    void init_screens(void);
+
+    void set_palette_high(ScreenDevice *scr, u8 high);
+    void set_palette_low(ScreenDevice *scr, u8 low);
+    void draw_pixel(u16 *layer, u16 x, u16 y, u8 colour);
+    void fill_layer(u16 *layer, u8 colour);
+    void erase_screen(Screen *nds);
+    void flip_buffer(Screen *nds);
+    void black_screen(Screen *nds);
+
+    void scr_draw_pixel( ScreenDevice *scr, u16 *layer, u8 draw);
+    void scr_draw_sprite(ScreenDevice *scr, u16 *layer, u8 draw);
+    void scr_fill_layer( ScreenDevice *scr, u16 *layer, u8 draw);
+    void scr_draw_line(  ScreenDevice *scr, u16 *layer, u8 draw);
+    void scr_draw_rect(  ScreenDevice *scr, u16 *layer, u8 draw);
+
+    void draw_dispatch(ScreenDevice *scr, u8 draw);
+    void move_cursor(ScreenDevice *scr, u8 move);
+
+    void push_sprite(SpriteBuffer *b, u8 row);
+
+#endif