/* * Apple // emulator for Linux: Video definitions * * Copyright 1994 Alexander Jean-Claude Bottema * Copyright 1995 Stephen Lee * Copyright 1997, 1998 Aaron Culliney * Copyright 1998, 1999, 2000 Michael Deutschmann * * This software package is subject to the GNU General Public License * version 2 or later (your choice) as published by the Free Software * Foundation. * * THERE ARE NO WARRANTIES WHATSOEVER. * */ #ifndef A2_VIDEO_H #define A2_VIDEO_H typedef struct video_backend_s { // mandatory video backend functions void (*init)(void *context); void (*main_loop)(void); void (*reshape)(int width, int height); void (*render)(void); void (*shutdown)(void); // optional functions void (*video_animation_show_cpuspeed)(void); void (*video_animation_show_track_sector)(int drive, int track, int sect); } video_backend_s; /* * The registered video backend (renderer). */ extern video_backend_s *video_backend; /* * Color structure */ typedef struct A2Color_s { uint8_t red; uint8_t green; uint8_t blue; } A2Color_s; /* * Reference to the internal 8bit-indexed color format */ extern A2Color_s colormap[]; /* * Prepare the video system, converting console to graphics mode, or * opening X window, or whatever. This is called only once when the * emulator is run */ void video_init(void); /* * Begin main video loop (does not return) */ void video_main_loop(void); /* * Undo anything done by video_init() and video_start(). Called before exiting the * emulator. */ void video_shutdown(void); /* * Setup the display. This may be called multiple times in a run, and is * used when graphics parameters (II+ vs //e, hires color representation) may * have changed. * * In future, all relevant information will be communicated through * FLAGS. For now, however, it is ignored and global variables are used * instead. * * This function is responsible for inserting any needed video-specific hooks * into the 6502 memory indirection table. It should *not* hook the * soft-switches. * */ void video_set(int flags); /* * Set the font used by the display. QTY characters are loaded starting * with FIRST, from DATA. DATA contains 8 bytes for each character, each * byte representing a row (top-to-bottom). The row byte contains 7 * pixels in little-endian format. * * MODE selects the colors to use * * 0 - Normal text * 1 - MouseText (usually treat as Normal) * 2 - Inverse * 3 - Flash * * The extra MouseText mode is in case we want to emulate certain RGB * adaptors which color normal text and MouseText differently. I had one * once for a //c. */ void video_loadfont(int first, int qty, const uint8_t *data, int mode); /* * Redraw the display. This is called after exiting an interface display, * when changes have been made to the Apple's emulated framebuffer that * bypass the driver's hooks, or when the video mode has changed. */ void video_redraw(void); /* * Change the displayed video page to PAGE * 0 - Page 1: $400-$7ff/$2000-$3fff * 1 - Page 2: $800-$bff/$4000-$5fff */ void video_setpage(int page); /* * Get a reference to current internal framebuffer */ const uint8_t * const video_current_framebuffer(); /* * True if anything changed in framebuffer and not yet drawn */ bool video_dirty(void); // ---------------------------------------------------------------------------- /* * VBL routines */ uint16_t video_scanner_get_address(bool *vblBarOut); uint8_t floating_bus(void); uint8_t floating_bus_hibit(const bool hibit); /* * 640x400 mode really isn't what it advertises. It's really 560x384 with 4 * extra bytes on each side for color interpolation hack. This is yet another * area where I've traded the optimization gain (especially on older slower * machines) for a standard resolution. */ #define _SCANWIDTH 560 #define _INTERPOLATED_PIXEL_ADJUSTMENT_PRE 4 #define _INTERPOLATED_PIXEL_ADJUSTMENT_POST 4 #define INTERPOLATED_PIXEL_ADJUSTMENT (_INTERPOLATED_PIXEL_ADJUSTMENT_PRE+_INTERPOLATED_PIXEL_ADJUSTMENT_POST) #define SCANWIDTH (_SCANWIDTH+INTERPOLATED_PIXEL_ADJUSTMENT) #define SCANHEIGHT 384 #define TEXT_ROWS 24 #define BEGIN_MIX 20 #define TEXT_COLS 40 #define TEXT80_COLS 80 #define FONT_GLYPH_X 8 #define FONT_GLYPH_Y FONT_GLYPH_X #define FONT_HEIGHT_PIXELS 16 #define FONT_WIDTH_PIXELS 14 #define FONT80_WIDTH_PIXELS 7 #define MOUSETEXT_BEGIN 0x90 #define MOUSETEXT_UP (MOUSETEXT_BEGIN+0x0b) #define MOUSETEXT_LEFT (MOUSETEXT_BEGIN+0x08) #define MOUSETEXT_RIGHT (MOUSETEXT_BEGIN+0x15) #define MOUSETEXT_DOWN (MOUSETEXT_BEGIN+0x0a) #define MOUSETEXT_OPENAPPLE (MOUSETEXT_BEGIN + 0x01) #define MOUSETEXT_CLOSEDAPPLE (MOUSETEXT_BEGIN + 0x00) #define COLOR_BLACK 0 #define COLOR_DARK_RED 35 #define COLOR_MEDIUM_RED 36 #define COLOR_LIGHT_RED 37 /* hgr used */ #define COLOR_DARK_GREEN 38 #define COLOR_MEDIUM_GREEN 39 #define COLOR_LIGHT_GREEN 40 /* hgr used */ #define COLOR_DARK_YELLOW 41 #define COLOR_MEDIUM_YELLOW 42 #define COLOR_LIGHT_YELLOW 43 #define COLOR_DARK_BLUE 44 #define COLOR_MEDIUM_BLUE 45 #define COLOR_LIGHT_BLUE 46 /* hgr used */ #define COLOR_DARK_PURPLE 47 #define COLOR_MEDIUM_PURPLE 48 #define COLOR_LIGHT_PURPLE 49 /* hgr used */ #define COLOR_DARK_CYAN 50 #define COLOR_MEDIUM_CYAN 51 #define COLOR_LIGHT_CYAN 52 #define COLOR_DARK_WHITE 53 #define COLOR_MEDIUM_WHITE 54 #define COLOR_LIGHT_WHITE 55 #define COLOR_FLASHING_BLACK 56 #define COLOR_FLASHING_WHITE 57 #define COLOR_FLASHING_UNGREEN 58 #define COLOR_FLASHING_GREEN 59 /* ---------------------------------- generic graphics globals ---------------------------------- */ /* * Pointers to framebuffer (can be VGA memory or host buffer) */ extern uint8_t *video__fb1,*video__fb2; extern uint8_t video__hires_even[0x800]; extern uint8_t video__hires_odd[0x800]; extern uint8_t video__dhires1[256]; extern uint8_t video__dhires2[256]; extern int video__current_page; /* Current visual page */ extern int video__strictcolors; /* --- Precalculated hi-res page offsets given addr --- */ extern unsigned int video__screen_addresses[8192]; extern uint8_t video__columns[8192]; extern uint8_t video__odd_colors[2]; extern uint8_t video__even_colors[2]; /* Hooks */ void video__write_2e_text0(), video__write_2e_text0_mixed(), video__write_2e_text1(), video__write_2e_text1_mixed(), video__write_2e_odd0(), video__write_2e_even0(), video__write_2e_odd0_mixed(), video__write_2e_even0_mixed(), video__write_2e_odd1(), video__write_2e_even1(), video__write_2e_odd1_mixed(), video__write_2e_even1_mixed(); #endif /* !A2_VIDEO_H */