/* -========================== Types & Macros ==========================- */\r
#define PAGE_OFFSET(x,y) (((y)<<6)+((y)<<4)+((x)>>2))\r
#define PLANE(x) (1<< (x&3))\r
-typedef byte far* page_t;\r
#define SELECT_ALL_PLANES() outpw(0x03c4, 0xff02)\r
typedef struct {\r
byte *data;\r
byte *palette;\r
} bitmap_t;\r
\r
+typedef struct {\r
+ byte far* data; /* the data for the page */\r
+ word dx; /* col we are viewing on the virtual screen */\r
+ word dy; /* row we are viewing on the virtual screen */\r
+ word width; /* virtual width of the page */\r
+ word height; /* virtual height of the page */\r
+} page_t;\r
+\r
/* -============================ Functions =============================- */\r
/* mode switching, page, and plane functions */\r
void modexEnter();\r
void modexLeave();\r
-void modexShowPage(page_t page);\r
+page_t modexDefaultPage();\r
+page_t modexNextPage(page_t *p);\r
+void modexShowPage(page_t *page);\r
void modexPanPage(page_t *page, int dx, int dy);\r
void modexSelectPlane(byte plane);\r
-void modexClearRegion(page_t page, int x, int y, int w, int h, byte color);\r
-void modexDrawBmp(page_t page, int x, int y, bitmap_t *bmp, byte sprite);\r
+void modexClearRegion(page_t *page, int x, int y, int w, int h, byte color);\r
+void modexDrawBmp(page_t *page, int x, int y, bitmap_t *bmp);\r
+void modexDrawBmpRegion(page_t *page, int x, int y, int rx, int ry, int rw, int rh, bitmap_t *bmp);\r
+void modexDrawSprite(page_t *page, int x, int y, bitmap_t *bmp);\r
+void modexDrawSpriteRegion(page_t *page, int x, int y, int rx, int ry, int rw, int rh, bitmap_t *bmp);\r
\r
/* Palette fade and flash effects */\r
void modexFadeOn(word fade, byte *palette);\r
\r
/* -======================= Constants & Vars ==========================- */\r
extern byte far* VGA; /* The VGA Memory */\r
+#define SCREEN_SEG 0xa000\r
#define VIDEO_INT 0x10\r
#define SET_MODE 0x00\r
#define VGA_256_COLOR_MODE 0x13\r
#define SCREEN_HEIGHT 240\r
#define PAGE_SIZE (word)(SCREEN_WIDTH/4 * SCREEN_HEIGHT)\r
\r
+#define AC_INDEX 0x03c0\r
#define SC_INDEX 0x03c4\r
#define SC_DATA 0x03c5\r
#define CRTC_INDEX 0x03d4\r
#define CRTC_DATA 0x03d5\r
+#define GC_INDEX 0x03ce\r
#define MISC_OUTPUT 0x03c2\r
#define HIGH_ADDRESS 0x0C\r
#define LOW_ADDRESS 0x0D\r