312 lines
7.2 KiB
C
312 lines
7.2 KiB
C
/* $NetBSD: video_subr.c,v 1.13 2012/02/12 16:34:11 matt Exp $ */
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/*-
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* Copyright (c) 2000 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 UCHIYAMA Yasushi.
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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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: video_subr.c,v 1.13 2012/02/12 16:34:11 matt Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <machine/bootinfo.h>
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#include <dev/hpc/video_subr.h>
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#define BPP2 ({ \
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u_int8_t bitmap; \
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bitmap = *(volatile u_int8_t*)addr; \
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*(volatile u_int8_t*)addr = \
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(bitmap & ~(0x3 << ((3 - (x % 4)) * 2))); \
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})
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#define BPP4 ({ \
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u_int8_t bitmap; \
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bitmap = *(volatile u_int8_t*)addr; \
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*(volatile u_int8_t*)addr = \
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(bitmap & ~(0xf << ((1 - (x % 2)) * 4))); \
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})
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#define BPP8 ({ \
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*(volatile u_int8_t*)addr = 0xff; \
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})
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#define BRESENHAM(a, b, c, d, func) ({ \
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u_int32_t fbaddr = vc->vc_fbvaddr; \
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u_int32_t fbwidth = vc->vc_fbwidth; \
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u_int32_t fbdepth = vc->vc_fbdepth; \
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len = a, step = b -1; \
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if (step == 0) \
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return; \
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kstep = len == 0 ? 0 : 1; \
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for (i = k = 0, j = step / 2; i <= step; i++) { \
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x = xbase c; \
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y = ybase d; \
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addr = fbaddr + (((y * fbwidth + x) * fbdepth) >> 3); \
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func; \
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j -= len; \
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while (j < 0) { \
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j += step; \
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k += kstep; \
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} \
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} \
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})
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#define DRAWLINE(func) ({ \
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if (x < 0) { \
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if (y < 0) { \
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if (_y < _x) { \
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BRESENHAM(_y, _x, -i, -k, func); \
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} else { \
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BRESENHAM(_x, _y, -k, -i, func); \
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} \
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} else { \
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if (_y < _x) { \
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BRESENHAM(_y, _x, -i, +k, func); \
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} else { \
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BRESENHAM(_x, _y, -k, +i, func); \
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} \
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} \
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} else { \
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if (y < 0) { \
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if (_y < _x) { \
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BRESENHAM(_y, _x, +i, -k, func); \
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} else { \
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BRESENHAM(_x, _y, +k, -i, func); \
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} \
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} else { \
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if (_y < _x) { \
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BRESENHAM(_y, _x, +i, +k, func); \
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} else { \
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BRESENHAM(_x, _y, +k, +i, func); \
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} \
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} \
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} \
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})
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#define LINEFUNC(b) \
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static void \
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linebpp##b(struct video_chip *vc, int x0, int y0, int x1, int y1) \
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{ \
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u_int32_t addr; \
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int i, j, k, len, step, kstep; \
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int x, _x, y, _y; \
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int xbase, ybase; \
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x = x1 - x0; \
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y = y1 - y0; \
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_x = abs(x); \
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_y = abs(y); \
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xbase = x0; \
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ybase = y0; \
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DRAWLINE(BPP##b); \
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}
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#define DOTFUNC(b) \
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static void \
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dotbpp##b(struct video_chip *vc, int x, int y) \
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{ \
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u_int32_t addr; \
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addr = vc->vc_fbvaddr + (((y * vc->vc_fbwidth + x) * \
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vc->vc_fbdepth) >> 3); \
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BPP##b; \
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}
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LINEFUNC(2)
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LINEFUNC(4)
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LINEFUNC(8)
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DOTFUNC(2)
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DOTFUNC(4)
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DOTFUNC(8)
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static void linebpp_unimpl(struct video_chip *, int, int, int, int);
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static void dotbpp_unimpl(struct video_chip *, int, int);
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int
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cmap_work_alloc(u_int8_t **r, u_int8_t **g, u_int8_t **b, u_int32_t **rgb,
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int cnt)
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{
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KASSERT(LEGAL_CLUT_INDEX(cnt - 1));
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#define ALLOC_BUF(x, bit) \
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if (x) { \
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*x = malloc(cnt * sizeof(u_int ## bit ## _t), \
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M_DEVBUF, M_WAITOK); \
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if (*x == 0) \
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goto errout; \
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}
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ALLOC_BUF(r, 8);
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ALLOC_BUF(g, 8);
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ALLOC_BUF(b, 8);
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ALLOC_BUF(rgb, 32);
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#undef ALLOCBUF
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return (0);
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errout:
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cmap_work_free(*r, *g, *b, *rgb);
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return (ENOMEM);
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}
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void
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cmap_work_free(u_int8_t *r, u_int8_t *g, u_int8_t *b, u_int32_t *rgb)
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{
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if (r)
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free(r, M_DEVBUF);
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if (g)
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free(g, M_DEVBUF);
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if (b)
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free(b, M_DEVBUF);
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if (rgb)
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free(rgb, M_DEVBUF);
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}
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void
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rgb24_compose(u_int32_t *rgb24, u_int8_t *r, u_int8_t *g, u_int8_t *b, int cnt)
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{
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int i;
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KASSERT(rgb24 && r && g && b && LEGAL_CLUT_INDEX(cnt - 1));
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for (i = 0; i < cnt; i++) {
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*rgb24++ = RGB24(r[i], g[i], b[i]);
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}
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}
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void
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rgb24_decompose(u_int32_t *rgb24, u_int8_t *r, u_int8_t *g, u_int8_t *b,
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int cnt)
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{
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int i;
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KASSERT(rgb24 && r && g && b && LEGAL_CLUT_INDEX(cnt - 1));
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for (i = 0; i < cnt; i++) {
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u_int32_t rgb = *rgb24++;
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*r++ = (rgb >> 16) & 0xff;
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*g++ = (rgb >> 8) & 0xff;
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*b++ = rgb & 0xff;
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}
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}
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/*
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* Debug routines.
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*/
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void
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video_calibration_pattern(struct video_chip *vc)
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{
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int x, y;
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x = vc->vc_fbwidth - 40;
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y = vc->vc_fbheight - 40;
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video_line(vc, 40, 40, x , 40);
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video_line(vc, x , 40, x , y );
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video_line(vc, x , y , 40, y );
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video_line(vc, 40, y , 40, 40);
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video_line(vc, 40, 40, x , y );
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video_line(vc, x, 40, 40, y );
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}
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static void
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linebpp_unimpl(struct video_chip *vc,
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int x0, int y0,
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int x1, int y1)
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{
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return;
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}
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static void
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dotbpp_unimpl(struct video_chip *vc, int x, int y)
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{
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return;
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}
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void
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video_attach_drawfunc(struct video_chip *vc)
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{
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switch (vc->vc_fbdepth) {
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default:
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vc->vc_drawline = linebpp_unimpl;
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vc->vc_drawdot = dotbpp_unimpl;
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break;
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case 8:
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vc->vc_drawline = linebpp8;
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vc->vc_drawdot = dotbpp8;
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break;
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case 4:
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vc->vc_drawline = linebpp4;
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vc->vc_drawdot = dotbpp4;
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break;
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case 2:
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vc->vc_drawline = linebpp2;
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vc->vc_drawdot = dotbpp2;
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break;
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}
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}
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void
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video_line(struct video_chip *vc, int x0, int y0, int x1, int y1)
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{
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if (vc->vc_drawline)
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vc->vc_drawline(vc, x0, y0, x1, y1);
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}
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void
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video_dot(struct video_chip *vc, int x, int y)
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{
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if (vc->vc_drawdot)
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vc->vc_drawdot(vc, x, y);
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}
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int
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video_reverse_color(void)
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{
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struct {
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int reverse, normal;
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} ctype[] = {
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{ BIFB_D2_M2L_3, BIFB_D2_M2L_0 },
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{ BIFB_D2_M2L_3x2, BIFB_D2_M2L_0x2 },
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{ BIFB_D8_FF, BIFB_D8_00 },
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{ BIFB_D16_FFFF, BIFB_D16_0000, },
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{ -1, -1 } /* terminator */
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}, *ctypep;
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u_int16_t fbtype;
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/* check reverse color */
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fbtype = bootinfo->fb_type;
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for (ctypep = ctype; ctypep->normal != -1 ; ctypep++) {
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if (fbtype == ctypep->normal) {
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return (0);
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} else if (fbtype == ctypep->reverse) {
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return (1);
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}
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}
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printf(": WARNING unknown frame buffer type 0x%04x.\n", fbtype);
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return (0);
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}
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