/* * 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); // touch HUD functions void (*animation_showTouchKeyboard)(void); void (*animation_hideTouchKeyboard)(void); void (*animation_showTouchJoystick)(void); void (*animation_hideTouchJoystick)(void); void (*animation_showTouchMenu)(void); void (*animation_hideTouchMenu)(void); // misc animations void (*animation_showMessage)(char *message, unsigned int cols, unsigned int rows); void (*animation_showPaused)(void); void (*animation_showCPUSpeed)(void); void (*animation_showDiskChosen)(int drive); void (*animation_showTrackSector)(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); /* * Enters main video loop (returns on emulator shutdown request). */ void video_main_loop(void); /* * Begins video subsystem shutdown. Because this process is multithreaded, this really just gives notice that a * shutdown has been requested, and so various threads should begin their own shutdown process. */ void video_shutdown(void); /* * Setup the display. This may be called multiple times in a run, and is * used when graphics parameters may have changed. * * 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_reset(void); /* * 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(); // do not access directly, but through inline accessor methods extern volatile unsigned long _backend_vid_dirty; /* * True if anything changed in framebuffer and not yet drawn */ static inline bool video_isDirty(void) { return _backend_vid_dirty; } /* * Atomically set dirty bit, return previous value */ static inline unsigned long video_setDirty(void) { return __sync_fetch_and_or(&_backend_vid_dirty, 1UL); } /* * Atomically clear dirty bit, return previous value */ static inline unsigned long video_clearDirty(void) { return __sync_fetch_and_and(&_backend_vid_dirty, 0UL); } // ---------------------------------------------------------------------------- /* * VBL routines */ uint16_t video_scanner_get_address(bool *vblBarOut); uint8_t floating_bus(void); uint8_t floating_bus_hibit(const bool hibit); #define TEXT_ROWS 24 #define BEGIN_MIX 20 #define TEXT_COLS 40 #define TEXT80_COLS (TEXT_COLS*2) #define FONT_HEIGHT_PIXELS 16 #define FONT_WIDTH_PIXELS 14 #define FONT80_WIDTH_PIXELS (FONT_WIDTH_PIXELS>>1) #define _SCANWIDTH (TEXT_COLS * FONT_WIDTH_PIXELS) // 560 #define SCANHEIGHT (TEXT_ROWS * FONT_HEIGHT_PIXELS) // 384 // Extra bytes on each side of internal framebuffers for color interpolation hack #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 FONT_GLYPH_X (7+/*unused*/1) // generated font.c uses a single byte (8bits) per font glyph line #define FONT_GLYPH_Y (FONT_HEIGHT_PIXELS>>1) // ... 8 bytes total for whole glyph #define MOUSETEXT_BEGIN 0x80 // offset + 0x20 length #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 MOUSETEXT_HOURGLASS (MOUSETEXT_BEGIN+0x03) #define MOUSETEXT_CHECKMARK (MOUSETEXT_BEGIN+0x04) #define ICONTEXT_BEGIN 0xA0 // offset + 0x22 length #define ICONTEXT_MENU_BEGIN ICONTEXT_BEGIN #define ICONTEXT_MENU_END (ICONTEXT_MENU_BEGIN+0x0A) #define ICONTEXT_DISK_UL (ICONTEXT_BEGIN+0x0B) #define ICONTEXT_DISK_UR (ICONTEXT_BEGIN+0x0C) #define ICONTEXT_DISK_LL (ICONTEXT_BEGIN+0x0D) #define ICONTEXT_DISK_LR (ICONTEXT_BEGIN+0x0E) #define ICONTEXT_UNLOCK (ICONTEXT_BEGIN+0x0F) #define ICONTEXT_GOTO (ICONTEXT_BEGIN+0x10) #define ICONTEXT_SPACE_VISUAL (ICONTEXT_BEGIN+0x11) #define ICONTEXT_MENU_SPROUT (MOUSETEXT_BEGIN+0x1B) #define ICONTEXT_MENU_TOUCHJOY (ICONTEXT_BEGIN+0x12) #define ICONTEXT_KBD_BEGIN (ICONTEXT_BEGIN+0x13) #define ICONTEXT_CTRL (ICONTEXT_KBD_BEGIN+0x00) #define ICONTEXT_LOWERCASE (ICONTEXT_KBD_BEGIN+0x01) #define ICONTEXT_UPPERCASE (ICONTEXT_KBD_BEGIN+0x02) #define ICONTEXT_SHOWALT1 (ICONTEXT_KBD_BEGIN+0x03) #define ICONTEXT_BACKSPACE (ICONTEXT_KBD_BEGIN+0x04) #define ICONTEXT_LEFTSPACE (ICONTEXT_KBD_BEGIN+0x06) #define ICONTEXT_MIDSPACE (ICONTEXT_KBD_BEGIN+0x07) #define ICONTEXT_RIGHTSPACE (ICONTEXT_KBD_BEGIN+0x08) #define ICONTEXT_ESC (ICONTEXT_KBD_BEGIN+0x09) #define ICONTEXT_RETURN_L (ICONTEXT_KBD_BEGIN+0x0A) #define ICONTEXT_RETURN_R (ICONTEXT_KBD_BEGIN+0x0B) #define ICONTEXT_NONACTIONABLE (ICONTEXT_KBD_BEGIN+0x0C) #define ICONTEXT_LEFT_TAB (ICONTEXT_KBD_BEGIN+0x..) #define ICONTEXT_RIGHT_TAB (ICONTEXT_KBD_BEGIN+0x..) #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; extern uint8_t *video__fb2; /* * Current visual page */ extern READONLY int video__current_page; #endif /* !A2_VIDEO_H */