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1.1.1.3 root 1: /*
1.1 root 2: * UAE - The Un*x Amiga Emulator
1.1.1.3 root 3: *
1.1 root 4: * Interface to the graphics system (X, SVGAlib)
1.1.1.3 root 5: *
6: * Copyright 1995-1997 Bernd Schmidt
1.1 root 7: */
8:
9: typedef long int xcolnr;
10:
1.1.1.2 root 11: typedef int (*allocfunc_type)(int, int, int, xcolnr *);
1.1 root 12:
13: extern xcolnr xcolors[4096];
14:
15: extern int buttonstate[3];
16: extern int newmousecounters;
17:
1.1.1.4 root 18: extern int graphics_setup (void);
19: extern int graphics_init (void);
20: extern void graphics_leave (void);
21: extern void handle_events (void);
22: extern void setup_brkhandler (void);
23:
24: extern void flush_line (int);
25: extern void flush_block (int, int);
26: extern void flush_screen (int, int);
27:
28: extern int lockscr (void);
29: extern void unlockscr (void);
30:
31: extern int debuggable (void);
32: extern int needmousehack (void);
33: extern void togglemouse (void);
34: extern void LED (int);
35:
36: extern int bits_in_mask (unsigned long mask);
37: extern int mask_shift (unsigned long mask);
38: extern unsigned long doMask (int p, int bits, int shift);
39: extern unsigned long doMask256 (int p, int bits, int shift);
40: extern void setup_maxcol (int);
41: extern void alloc_colors256 (int (*)(int, int, int, xcolnr *));
42: extern void alloc_colors64k (int, int, int, int, int, int);
43: extern void setup_greydither (int bits, allocfunc_type allocfunc);
44: extern void setup_greydither_maxcol (int maxcol, allocfunc_type allocfunc);
45: extern void setup_dither (int bits, allocfunc_type allocfunc);
46: extern void DitherLine (uae_u8 *l, uae_u16 *r4g4b4, int x, int y, uae_s16 len, int bits) ASM_SYM_FOR_FUNC("DitherLine");
1.1 root 47:
48: struct vidbuf_description
49: {
1.1.1.4 root 50: /* The graphics code has a choice whether it wants to use a large buffer
51: * for the whole display, or only a small buffer for a single line.
52: * If you use a large buffer:
53: * - set bufmem to point at it
54: * - set linemem to 0
55: * - if memcpy within bufmem would be very slow, i.e. because bufmem is
1.1.1.6 root 56: * in graphics card memory, also set emergmem to point to a buffer
1.1.1.4 root 57: * that is large enough to hold a single line.
58: * - implement flush_line to be a no-op.
59: * If you use a single line buffer:
60: * - set bufmem and emergmem to 0
61: * - set linemem to point at your buffer
62: * - implement flush_line to copy a single line to the screen
63: */
64: char *bufmem;
65: char *linemem;
66: char *emergmem;
1.1.1.2 root 67: int rowbytes; /* Bytes per row in the memory pointed at by bufmem. */
68: int pixbytes; /* Bytes per pixel. */
1.1.1.3 root 69: int width;
70: int height;
1.1.1.2 root 71: int maxblocklines; /* Set to 0 if you want calls to flush_line after each drawn line, or the number of
72: * lines that flush_block wants to/can handle (it isn't really useful to use another
73: * value than maxline here). */
1.1.1.3 root 74: int can_double; /* Set if the high part of each entry in xcolors contains the same value
75: * as the low part, so that two pixels can be drawn at once. */
1.1 root 76: };
77:
78: extern struct vidbuf_description gfxvidinfo;
1.1.1.3 root 79:
80: /* For ports using tui.c, this should be built by graphics_setup(). */
81: extern struct bstring *video_mode_menu;
82: extern void vidmode_menu_selected(int);
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