99 lines
3.7 KiB
C
99 lines
3.7 KiB
C
/*
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* screen.h - low-level screen routines
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*
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* Copyright (c) 2013 The EmuTOS development team
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*
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* Authors:
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* PES Petr Stehlik
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* RFB Roger Burrows
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*
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* This file is distributed under the GPL, version 2 or at your
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* option any later version. See doc/license.txt for details.
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*/
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#ifndef VIDEL_H
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#define VIDEL_H
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#define SPSHIFT 0xffff8266L
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#define FRGB_BLACK 0x00000000 /* Falcon palette */
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#define FRGB_BLUE 0x000000ff
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#define FRGB_GREEN 0x00ff0000
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#define FRGB_CYAN 0x00ff00ff
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#define FRGB_RED 0xff000000
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#define FRGB_MAGENTA 0xff0000ff
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#define FRGB_LTGRAY 0xbbbb00bb
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#define FRGB_GRAY 0x88880088
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#define FRGB_LTBLUE 0x000000aa
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#define FRGB_LTGREEN 0x00aa0000
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#define FRGB_LTCYAN 0x00aa00aa
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#define FRGB_LTRED 0xaa000000
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#define FRGB_LTMAGENTA 0xaa0000aa
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#define FRGB_YELLOW 0xffff0000
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#define FRGB_LTYELLOW 0xaaaa0000
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#define FRGB_WHITE 0xffff00ff
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/* bit settings for Falcon videomodes */
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#define VIDEL_VALID 0x01ff /* the only bits allowed in a videomode */
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#define VIDEL_VERTICAL 0x0100 /* if set, use interlace (TV), double line (VGA) */
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#define VIDEL_COMPAT 0x0080 /* ST-compatible if set */
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#define VIDEL_OVERSCAN 0x0040 /* overscan if set (not used with VGA) */
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#define VIDEL_PAL 0x0020 /* PAL if set; otherwise NTSC */
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#define VIDEL_VGA 0x0010 /* VGA if set; otherwise TV */
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#define VIDEL_80COL 0x0008 /* 80-column mode if set; otherwise 40 */
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#define VIDEL_BPPMASK 0x0007 /* mask for bits/pixel encoding */
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#define VIDEL_1BPP 0 /* 2 colours */
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#define VIDEL_2BPP 1 /* 4 colours */
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#define VIDEL_4BPP 2 /* 16 colours */
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#define VIDEL_8BPP 3 /* 256 colours */
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#define VIDEL_TRUECOLOR 4 /* 65536 colours */
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/* test for VDI support of videomode */
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#define VALID_VDI_BPP(mode) ((mode&VIDEL_BPPMASK)<=VIDEL_8BPP)
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/* selected Falcon videomodes */
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#define FALCON_ST_HIGH (VIDEL_COMPAT|VIDEL_VGA|VIDEL_80COL|VIDEL_1BPP)
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#define FALCON_DEFAULT_BOOT (VIDEL_VERTICAL|VIDEL_80COL|VIDEL_8BPP) /* 640x480x256 colours, TV, NTSC */
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#define FALCON_REZ 3 /* used as a Falcon indicator */
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typedef struct {
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int16_t vmode; /* video mode (-1 => end marker) */
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int16_t monitor; /* applicable monitors */
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uint16_t hht; /* H hold timer */
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uint16_t hbb; /* H border begin */
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uint16_t hbe; /* H border end */
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uint16_t hdb; /* H display begin */
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uint16_t hde; /* H display end */
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uint16_t hss; /* H SS */
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uint16_t vft; /* V freq timer */
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uint16_t vbb; /* V border begin */
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uint16_t vbe; /* V border end */
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uint16_t vdb; /* V display begin */
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uint16_t vde; /* V display end */
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uint16_t vss; /* V SS */
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} VMODE_ENTRY;
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extern void initialise_falcon_palette(int16_t mode);
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extern const VMODE_ENTRY *lookup_videl_mode(int16_t mode,int16_t monitor);
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/* Public XBIOS functions */
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extern int16_t vsetmode(int16_t mode);
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extern int16_t vmontype(void);
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extern int16_t vsetsync(int16_t external);
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extern int32_t vgetsize(int16_t mode);
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extern int16_t vsetrgb(int16_t index,int16_t count, uint32_t *rgb);
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extern int16_t vgetrgb(int16_t index,int16_t count, uint32_t *rgb);
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/* misc routines */
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extern int16_t get_videl_mode(void);
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extern int16_t vfixmode(int16_t mode);
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extern int16_t videl_check_moderez(int16_t moderez);
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extern uint32_t videl_vram_size(void);
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extern void videl_get_current_mode_info(uint16_t *planes, uint16_t *hz_rez, uint16_t *vt_rez);
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extern int16_t current_video_mode;
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#endif /* VIDEL_H */
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