269 lines
8.5 KiB
C
269 lines
8.5 KiB
C
/* $NetBSD: rasops.h,v 1.49 2019/11/02 01:14:57 tsutsui Exp $ */
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/*-
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* Copyright (c) 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Andrew Doran.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _RASOPS_H_
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#define _RASOPS_H_ 1
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#include <sys/param.h>
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#include <dev/wscons/wsconsio.h>
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#include <dev/wsfont/wsfont.h>
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/* For rasops_info::ri_flg */
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#define RI_FULLCLEAR 0x01 /* eraserows() hack to clear full screen */
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#define RI_FORCEMONO 0x02 /* monochrome output even if we can do color */
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#define RI_BSWAP 0x04 /* framebuffer endianness doesn't match CPU */
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#define RI_CURSOR 0x08 /* cursor is switched on */
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#define RI_CLEAR 0x10 /* clear display on startup */
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#define RI_CENTER 0x20 /* center onscreen output */
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#define RI_CURSORCLIP 0x40 /* cursor is currently clipped */
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#define RI_CFGDONE 0x80 /* rasops_reconfig() completed successfully */
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#define RI_ROTATE_CW 0x100 /* display is rotated, quarter clockwise */
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#define RI_ROTATE_CCW 0x200 /* display is rotated, quarter counter-clockwise */
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#define RI_ROTATE_UD 0x400 /* display is rotated, upside-down */
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#define RI_ROTATE_MASK 0x700
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/*
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* if you call rasops_init() or rasops_reconfig() in a context where it is not
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* safe to call kmem_alloc(), like early on during kernel startup, you MUST set
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* RI_NO_AUTO to keep rasops from trying to allocate memory for autogenerated
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* box drawing characters
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*/
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#define RI_NO_AUTO 0x800 /* do not generate box drawing characters */
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/*
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* Set this if your driver's putchar() method supports anti-aliased fonts in
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* the given video mode. Without this flag rasops_init() will only ever pick
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* monochrome bitmap fonts.
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*/
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#define RI_ENABLE_ALPHA 0x1000
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/* set this in order to use r3g3b2 'true' colour in 8 bit */
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#define RI_8BIT_IS_RGB 0x2000
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/*
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* drivers can set this to tell the font selection code that they'd rather
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* use alpha fonts
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*/
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#define RI_PREFER_ALPHA 0x4000
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struct rasops_info {
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/* These must be filled in by the caller */
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int ri_depth; /* depth in bits */
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uint8_t *ri_bits; /* ptr to bits */
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int ri_width; /* width (pels) */
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int ri_height; /* height (pels) */
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int ri_stride; /* stride in bytes */
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/*
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* If you want shadow framebuffer support, point ri_hwbits
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* to the real framebuffer, and ri_bits to the shadow framebuffer
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*/
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uint8_t *ri_hwbits;
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/*
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* These can optionally be left zeroed out. If you fill ri_font,
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* but aren't using wsfont, set ri_wsfcookie to -1.
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*/
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struct wsdisplay_font *ri_font;
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struct wsdisplay_font ri_optfont;
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int ri_wsfcookie; /* wsfont cookie */
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void *ri_hw; /* driver private data; ignored by rasops */
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int ri_crow; /* cursor row */
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int ri_ccol; /* cursor column */
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int ri_flg; /* various operational flags */
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/*
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* These are optional and will default if zero. Meaningless
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* on depths other than 15, 16, 24 and 32 bits per pel. On
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* 24 bit displays, ri_{r,g,b}num must be 8.
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*/
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uint8_t ri_rnum; /* number of bits for red */
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uint8_t ri_gnum; /* number of bits for green */
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uint8_t ri_bnum; /* number of bits for blue */
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uint8_t ri_rpos; /* which bit red starts at */
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uint8_t ri_gpos; /* which bit green starts at */
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uint8_t ri_bpos; /* which bit blue starts at */
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/* These are filled in by rasops_init() */
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int ri_emuwidth; /* width we actually care about */
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int ri_emuheight; /* height we actually care about */
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int ri_emustride; /* bytes per row we actually care about */
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int ri_rows; /* number of rows (characters, not pels) */
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int ri_cols; /* number of columns (characters, not pels) */
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#if __NetBSD_Prereq__(9, 99, 1)
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struct {
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int off; /* offset of underline from bottom */
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int height; /* height of underline */
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} ri_ul;
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#else
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/*
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* XXX
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* hack to keep ABI compatibility for netbsd-9, -8, and -7.
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*/
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// int ri_delta; /* obsoleted */
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struct {
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short off;
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short height;
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} __packed ri_ul;
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#endif
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int ri_pelbytes; /* bytes per pel (may be zero) */
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int ri_fontscale; /* fontheight * fontstride */
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int ri_xscale; /* fontwidth * pelbytes */
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int ri_yscale; /* fontheight * stride */
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uint8_t *ri_origbits; /* where screen bits actually start */
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uint8_t *ri_hworigbits; /* where hw bits actually start */
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int ri_xorigin; /* where ri_bits begins (x) */
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int ri_yorigin; /* where ri_bits begins (y) */
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uint32_t
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ri_devcmap[16]; /* color -> framebuffer data */
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/* The emulops you need to use, and the screen caps for wscons */
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struct wsdisplay_emulops ri_ops;
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int ri_caps;
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/* Callbacks so we can share some code */
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void (*ri_do_cursor)(struct rasops_info *);
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/* Used to intercept putchar to permit display rotation */
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struct wsdisplay_emulops ri_real_ops;
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};
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#define CHAR_IN_FONT(c, font) \
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((c) >= (font)->firstchar && \
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(c) - (font)->firstchar < (font)->numchars)
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#define PICK_FONT(ri, c) \
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((((c) & WSFONT_FLAGS_MASK) == WSFONT_FLAG_OPT && \
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(ri)->ri_optfont.data != NULL) ? \
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&(ri)->ri_optfont : (ri)->ri_font)
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/*
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* rasops_init().
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*
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* Integer parameters are the number of rows and columns we'd *like*.
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*
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* In terms of optimization, fonts that are a multiple of 8 pixels wide
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* work the best.
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*
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* rasops_init() takes care of rasops_reconfig(). The parameters to both
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* are the same. If calling rasops_reconfig() to change the font and
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* ri_wsfcookie >= 0, you must call wsfont_unlock() on it, and reset it
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* to -1 (or a new, valid cookie).
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*/
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/* rasops.c */
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int rasops_init(struct rasops_info *, int, int);
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int rasops_reconfig(struct rasops_info *, int, int);
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void rasops_unpack_attr(long, int *, int *, int *);
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void rasops_eraserows(void *, int, int, long);
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void rasops_erasecols(void *, int, int, int, long);
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int rasops_get_cmap(struct rasops_info *, uint8_t *, size_t);
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extern const uint8_t rasops_cmap[256 * 3];
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#ifdef _RASOPS_PRIVATE
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/*
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* Per-depth initialization functions.
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*/
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void rasops1_init(struct rasops_info *);
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void rasops2_init(struct rasops_info *);
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void rasops4_init(struct rasops_info *);
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void rasops8_init(struct rasops_info *);
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void rasops15_init(struct rasops_info *);
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void rasops24_init(struct rasops_info *);
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void rasops32_init(struct rasops_info *);
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#define ATTR_BG(ri, attr) ((ri)->ri_devcmap[((uint32_t)(attr) >> 16) & 0xf])
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#define ATTR_FG(ri, attr) ((ri)->ri_devcmap[((uint32_t)(attr) >> 24) & 0xf])
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#define ATTR_MASK_BG __BITS(16, 19)
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#define ATTR_MASK_FG __BITS(24, 27)
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#define DELTA(p, d, cast) ((p) = (cast)((uint8_t *)(p) + (d)))
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#define FBOFFSET(ri, row, col) \
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((row) * (ri)->ri_yscale + (col) * (ri)->ri_xscale)
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#define FONT_GLYPH(uc, font, ri) \
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((uint8_t *)(font)->data + ((uc) - ((font)->firstchar)) * \
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(ri)->ri_fontscale)
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static __inline void
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rasops_memset32(void *p, uint32_t val, size_t bytes)
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{
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int slop1, slop2, full;
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uint8_t *dp = (uint8_t *)p;
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if (bytes == 1) {
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*dp = val;
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return;
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}
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slop1 = (4 - ((uintptr_t)dp & 3)) & 3;
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slop2 = (bytes - slop1) & 3;
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full = (bytes - slop1 /* - slop2 */) >> 2;
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if (slop1 & 1)
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*dp++ = val;
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if (slop1 & 2) {
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*(uint16_t *)dp = val;
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dp += 2;
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}
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for (; full; full--) {
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*(uint32_t *)dp = val;
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dp += 4;
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}
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if (slop2 & 2) {
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*(uint16_t *)dp = val;
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dp += 2;
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}
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if (slop2 & 1)
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*dp = val;
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return;
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}
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static __inline uint32_t
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rasops_be32uatoh(uint8_t *p)
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{
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uint32_t u;
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u = p[0]; u <<= 8;
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u |= p[1]; u <<= 8;
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u |= p[2]; u <<= 8;
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u |= p[3];
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return u;
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}
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#endif /* _RASOPS_PRIVATE */
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#endif /* _RASOPS_H_ */
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