2 * Functions for handling modex and doing other basic graphics stuff.
7 #include "src/lib/types.h"
8 #include "src/lib/bitmap.h"
9 #include "src/lib/planar.h"
11 /* -========================== Types & Macros ==========================- */
12 #define PAGE_OFFSET(x,y) (((y)<<6)+((y)<<4)+((x)>>2))
13 #define PLANE(x) (1<< (x&3))
14 #define SELECT_ALL_PLANES() outpw(0x03c4, 0xff02)
17 byte far* data; /* the data for the page */
18 word dx; /* col we are viewing on the virtual screen */
19 word dy; /* row we are viewing on the virtual screen */
20 word width; /* virtual width of the page */
21 word height; /* virtual height of the page */
31 /* -============================ Functions =============================- */
32 /* mode switching, page, and plane functions */
35 page_t modexDefaultPage();
36 page_t modexNextPage(page_t *p);
37 void modexShowPage(page_t *page);
38 void modexPanPage(page_t *page, int dx, int dy);
39 void modexSelectPlane(byte plane);
40 void modexClearRegion(page_t *page, int x, int y, int w, int h, byte color);
41 void modexDrawBmp(page_t *page, int x, int y, bitmap_t *bmp);
42 void modexDrawBmpRegion(page_t *page, int x, int y, int rx, int ry, int rw, int rh, bitmap_t *bmp);
43 void modexDrawPlanarBuf(page_t *page, int x, int y, planar_buf_t *bmp);
44 void modexDrawSprite(page_t *page, int x, int y, bitmap_t *bmp);
45 void modexDrawSpriteRegion(page_t *page, int x, int y, int rx, int ry, int rw, int rh, bitmap_t *bmp);
46 void modexCopyPageRegion(page_t *dest, page_t *src, word sx, word sy, word dx, word dy, word width, word height);
48 /* Palette fade and flash effects */
49 void modexFadeOn(word fade, byte *palette);
50 void modexFadeOff(word fade, byte *palette);
51 void modexFlashOn(word fade, byte *palette);
52 void modexFlashOff(word fade, byte *palette);
54 /* palette loading and saving */
55 void modexPalSave(byte *palette);
57 void modexLoadPalFile(char *filename, byte **palette);
58 void modexSavePalFile(char *filename, byte *palette);
60 /* fixed palette functions */
64 /* utility functions */
65 void modexPalUpdate(bitmap_t *bmp, word *i, word qp, word aqoffset);
66 void modexPalUpdate1(byte *p);
67 void modexPalUpdate0(byte *p);
68 void chkcolor(bitmap_t *bmp, word *q, word *a, word *aa, word *z, word *i/*, word *offset*/);
69 void modexWaitBorder();
71 /* -======================= Constants & Vars ==========================- */
72 extern byte far* VGA; /* The VGA Memory */
73 #define SCREEN_SEG 0xa000
74 #define VIDEO_INT 0x10
76 #define VGA_256_COLOR_MODE 0x13
77 #define TEXT_MODE 0x03
78 #define SCREEN_WIDTH 320
79 #define SCREEN_HEIGHT 240
80 #define PAGE_SIZE (word)(SCREEN_WIDTH/4 * SCREEN_HEIGHT)
82 #define AC_INDEX 0x03c0
83 #define SC_INDEX 0x03c4
84 #define SC_DATA 0x03c5
85 #define CRTC_INDEX 0x03d4
86 #define CRTC_DATA 0x03d5
87 #define GC_INDEX 0x03ce
88 #define MISC_OUTPUT 0x03c2
89 #define HIGH_ADDRESS 0x0C
90 #define LOW_ADDRESS 0x0D
92 #define INPUT_STATUS_1 0x03da
93 #define DISPLAY_ENABLE 0x01
95 #define PAL_READ_REG 0x03C7 /* Color register, read address */
96 #define PAL_WRITE_REG 0x03C8 /* Color register, write address */
97 #define PAL_DATA_REG 0x03C9 /* Color register, data port */
98 #define PAL_SIZE (256 * 3)