229 lines
6.4 KiB
C
229 lines
6.4 KiB
C
/*
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* Apple // emulator for Linux: Video definitions
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*
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* Copyright 1994 Alexander Jean-Claude Bottema
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* Copyright 1995 Stephen Lee
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* Copyright 1997, 1998 Aaron Culliney
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* Copyright 1998, 1999, 2000 Michael Deutschmann
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*
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* This software package is subject to the GNU General Public License
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* version 2 or later (your choice) as published by the Free Software
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* Foundation.
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*
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* THERE ARE NO WARRANTIES WHATSOEVER.
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*
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*/
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#ifndef A2_VIDEO_H
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#define A2_VIDEO_H
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#ifndef __ASSEMBLER__
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#include "prefs.h"
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/* Prepare the video system, converting console to graphics mode, or
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* opening X window, or whatever. This is called only once when the
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* emulator is run
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*/
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void video_init(void);
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/* Undo anything done by video_init. This is called before exiting the
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* emulator.
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*/
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void video_shutdown(void);
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/* Setup the display. This may be called multiple times in a run, and is
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* used when graphics parameters (II+ vs //e, hires color representation) may
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* have changed.
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*
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* In future, all relevant information will be communicated through
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* FLAGS. For now, however, it is ignored and global variables are used
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* instead.
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*
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* This function is responsible for inserting any needed video-specific hooks
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* into the 6502 memory indirection table. It should *not* hook the
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* soft-switches.
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*
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*/
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void video_set(int flags);
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/* Set the font used by the display. QTY characters are loaded starting
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* with FIRST, from DATA. DATA contains 8 bytes for each character, each
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* byte representing a row (top-to-bottom). The row byte contains 7
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* pixels in little-endian format.
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*
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* MODE selects the colors to use
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*
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* 0 - Normal text
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* 1 - MouseText (usually treat as Normal)
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* 2 - Inverse
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* 3 - Flash
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*
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* The extra MouseText mode is in case we want to emulate certain RGB
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* adaptors which color normal text and MouseText differently. I had one
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* once for a //c.
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*/
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void video_loadfont(int first,
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int qty,
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const unsigned char *data,
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int mode);
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/* Redraw the display. This is called after exiting an interface display,
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* when changes have been made to the Apple's emulated framebuffer that
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* bypass the driver's hooks, or when the video mode has changed.
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*/
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void video_redraw(void);
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/* Change the displayed video page to PAGE
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* 0 - Page 1: $400-$7ff/$2000-$3fff
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* 1 - Page 2: $800-$bff/$4000-$5fff
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*/
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void video_setpage(int page);
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/* Like loadfont, but writes to a seperate 256 character table used by
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* video_plotchar and not the apple text-mode display.
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*/
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void video_loadfont_int(int first, int qty, const unsigned char *data);
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/* Plot a character to the text mode screen, *not* writing to apple
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* memory. This is used by the interface screens.
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*
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* ROW, COL, and CODE are self-expanatory. COLOR gives the color scheme
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* to use:
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*
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* 0 - Green text on Black background
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* 1 - Green text on Blue background
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* 2 - Red text on Black background
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*/
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void video_plotchar(int row, int col, int color, unsigned char code);
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/* Called at about 30Hz (this may change in future), and when waiting in
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* the interface screens.
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*
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* Should flush any video data to the real screen (if any kind of caching
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* is in use), check for keyboard input (presently reported via
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* c_read_raw_key), and handle flashing text characters.
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*/
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void video_sync(int block);
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void video_set_mode(a2_video_mode_t mode);
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#endif /* !__ASSEMBLER__ */
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/**** Private stuff follows *****/
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#ifdef _640x400
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/* 640x400 mode really isn't what it advertises. It's really 560x384 with 4
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* extra bytes on each side for color interpolation hack. This is yet another
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* area where I've traded the optimization gain (especially on older slower
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* machines) for a standard resolution.
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*/
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#define SCANWIDTH 568
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#define SCANHEIGHT 384
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#define SCANSTEP SCANWIDTH-12
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#else /* !_640x400 */
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#define SCANWIDTH 320
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#define SCANHEIGHT 200
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#define SCANSTEP SCANWIDTH-6
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#endif /* !_640x400 */
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#define COLOR_BLACK 0
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#define COLOR_DARK_RED 35
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#define COLOR_MEDIUM_RED 36
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#define COLOR_LIGHT_RED 37 /* hgr used */
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#define COLOR_DARK_GREEN 38
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#define COLOR_MEDIUM_GREEN 39
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#define COLOR_LIGHT_GREEN 40 /* hgr used */
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#define COLOR_DARK_YELLOW 41
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#define COLOR_MEDIUM_YELLOW 42
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#define COLOR_LIGHT_YELLOW 43
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#define COLOR_DARK_BLUE 44
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#define COLOR_MEDIUM_BLUE 45
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#define COLOR_LIGHT_BLUE 46 /* hgr used */
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#define COLOR_DARK_PURPLE 47
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#define COLOR_MEDIUM_PURPLE 48
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#define COLOR_LIGHT_PURPLE 49 /* hgr used */
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#define COLOR_DARK_CYAN 50
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#define COLOR_MEDIUM_CYAN 51
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#define COLOR_LIGHT_CYAN 52
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#define COLOR_DARK_WHITE 53
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#define COLOR_MEDIUM_WHITE 54
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#define COLOR_LIGHT_WHITE 55
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#define COLOR_FLASHING_BLACK 56
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#define COLOR_FLASHING_WHITE 57
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#define COLOR_FLASHING_UNGREEN 58
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#define COLOR_FLASHING_GREEN 59
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#ifndef __ASSEMBLER__
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/* ----------------------------------
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generic graphics globals
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---------------------------------- */
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/* Pointers to framebuffer (can be VGA memory or host buffer)
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*/
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extern unsigned char *video__fb1,*video__fb2;
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#ifdef _640x400
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extern unsigned char video__wider_hires_even[0x1000];
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extern unsigned char video__wider_hires_odd[0x1000];
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#endif /* _640x400 */
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extern unsigned char video__hires_even[0x800];
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extern unsigned char video__hires_odd[0x800];
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extern unsigned char video__dhires1[256];
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extern unsigned char video__dhires2[256];
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extern int video__current_page; /* Current visual page */
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extern int video__strictcolors;
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/* --- Precalculated hi-res page offsets given addr --- */
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extern unsigned int video__screen_addresses[8192];
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extern unsigned char video__columns[8192];
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extern unsigned char video__odd_colors[2];
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extern unsigned char video__even_colors[2];
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/* Hooks */
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void video__write_text0(),
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video__write_text0_mixed(),
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video__write_text1(),
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video__write_text1_mixed(),
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video__write_even0(),
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video__write_odd0(),
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video__write_even0_mixed(),
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video__write_odd0_mixed(),
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video__write_even1(),
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video__write_odd1(),
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video__write_even1_mixed(),
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video__write_odd1_mixed();
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void video__write_2e_text0(),
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video__write_2e_text0_mixed(),
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video__write_2e_text1(),
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video__write_2e_text1_mixed(),
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video__write_2e_odd0(),
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video__write_2e_even0(),
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video__write_2e_odd0_mixed(),
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video__write_2e_even0_mixed(),
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video__write_2e_odd1(),
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video__write_2e_even1(),
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video__write_2e_odd1_mixed(),
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video__write_2e_even1_mixed();
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#endif /* !__ASSEMBLER__ */
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#endif /* !A2_VIDEO_H */
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