689 lines
18 KiB
C
689 lines
18 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1991-1997 Søren Schmidt
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* All rights reserved.
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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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* in this position and unchanged.
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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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <signal.h>
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#include <sys/fbio.h>
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#include <sys/kbio.h>
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#include <sys/endian.h>
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#include "vgl.h"
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static int VGLBlank;
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static byte VGLBorderColor;
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static byte VGLSavePaletteRed[256];
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static byte VGLSavePaletteGreen[256];
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static byte VGLSavePaletteBlue[256];
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#define ABS(a) (((a)<0) ? -(a) : (a))
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#define SGN(a) (((a)<0) ? -1 : 1)
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#define min(x, y) (((x) < (y)) ? (x) : (y))
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#define max(x, y) (((x) > (y)) ? (x) : (y))
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void
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VGLSetXY(VGLBitmap *object, int x, int y, u_long color)
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{
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int offset, soffset, undermouse;
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VGLCheckSwitch();
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if (x>=0 && x<object->VXsize && y>=0 && y<object->VYsize) {
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if (object == VGLDisplay) {
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undermouse = VGLMouseFreezeXY(x, y);
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VGLSetXY(&VGLVDisplay, x, y, color);
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} else if (object->Type != MEMBUF)
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return; /* invalid */
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else
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undermouse = 0;
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if (!undermouse) {
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offset = (y * object->VXsize + x) * object->PixelBytes;
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switch (object->Type) {
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case VIDBUF8S:
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case VIDBUF16S:
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case VIDBUF32S:
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offset = VGLSetSegment(offset);
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/* FALLTHROUGH */
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case MEMBUF:
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case VIDBUF8:
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case VIDBUF16:
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case VIDBUF24:
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case VIDBUF32:
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color = htole32(color);
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switch (object->PixelBytes) {
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case 1:
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memcpy(&object->Bitmap[offset], &color, 1);
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break;
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case 2:
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memcpy(&object->Bitmap[offset], &color, 2);
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break;
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case 3:
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memcpy(&object->Bitmap[offset], &color, 3);
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break;
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case 4:
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memcpy(&object->Bitmap[offset], &color, 4);
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break;
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}
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break;
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case VIDBUF24S:
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soffset = VGLSetSegment(offset);
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color = htole32(color);
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switch (VGLAdpInfo.va_window_size - soffset) {
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case 1:
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memcpy(&object->Bitmap[soffset], &color, 1);
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soffset = VGLSetSegment(offset + 1);
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memcpy(&object->Bitmap[soffset], (byte *)&color + 1, 2);
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break;
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case 2:
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memcpy(&object->Bitmap[soffset], &color, 2);
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soffset = VGLSetSegment(offset + 2);
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memcpy(&object->Bitmap[soffset], (byte *)&color + 2, 1);
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break;
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default:
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memcpy(&object->Bitmap[soffset], &color, 3);
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break;
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}
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break;
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case VIDBUF8X:
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outb(0x3c4, 0x02);
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outb(0x3c5, 0x01 << (x&0x3));
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object->Bitmap[(unsigned)(VGLAdpInfo.va_line_width*y)+(x/4)] = ((byte)color);
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break;
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case VIDBUF4S:
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offset = VGLSetSegment(y*VGLAdpInfo.va_line_width + x/8);
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goto set_planar;
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case VIDBUF4:
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offset = y*VGLAdpInfo.va_line_width + x/8;
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set_planar:
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outb(0x3c4, 0x02); outb(0x3c5, 0x0f);
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outb(0x3ce, 0x00); outb(0x3cf, (byte)color & 0x0f); /* set/reset */
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outb(0x3ce, 0x01); outb(0x3cf, 0x0f); /* set/reset enable */
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outb(0x3ce, 0x08); outb(0x3cf, 0x80 >> (x%8)); /* bit mask */
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object->Bitmap[offset] |= (byte)color;
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}
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}
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if (object == VGLDisplay)
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VGLMouseUnFreeze();
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}
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}
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u_long
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VGLGetXY(VGLBitmap *object, int x, int y)
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{
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u_long color;
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int offset;
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VGLCheckSwitch();
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if (x<0 || x>=object->VXsize || y<0 || y>=object->VYsize)
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return 0;
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if (object == VGLDisplay)
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object = &VGLVDisplay;
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else if (object->Type != MEMBUF)
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return 0; /* invalid */
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offset = (y * object->VXsize + x) * object->PixelBytes;
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switch (object->PixelBytes) {
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case 1:
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memcpy(&color, &object->Bitmap[offset], 1);
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return le32toh(color) & 0xff;
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case 2:
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memcpy(&color, &object->Bitmap[offset], 2);
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return le32toh(color) & 0xffff;
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case 3:
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memcpy(&color, &object->Bitmap[offset], 3);
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return le32toh(color) & 0xffffff;
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case 4:
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memcpy(&color, &object->Bitmap[offset], 4);
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return le32toh(color);
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}
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return 0; /* invalid */
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}
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/*
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* Symmetric Double Step Line Algorithm by Brian Wyvill from
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* "Graphics Gems", Academic Press, 1990.
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*/
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#define SL_SWAP(a,b) {a^=b; b^=a; a^=b;}
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#define SL_ABSOLUTE(i,j,k) ( (i-j)*(k = ( (i-j)<0 ? -1 : 1)))
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void
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plot(VGLBitmap * object, int x, int y, int flag, u_long color)
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{
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/* non-zero flag indicates the pixels need swapping back. */
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if (flag)
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VGLSetXY(object, y, x, color);
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else
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VGLSetXY(object, x, y, color);
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}
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void
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VGLLine(VGLBitmap *object, int x1, int y1, int x2, int y2, u_long color)
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{
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int dx, dy, incr1, incr2, D, x, y, xend, c, pixels_left;
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int sign_x, sign_y, step, reverse, i;
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dx = SL_ABSOLUTE(x2, x1, sign_x);
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dy = SL_ABSOLUTE(y2, y1, sign_y);
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/* decide increment sign by the slope sign */
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if (sign_x == sign_y)
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step = 1;
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else
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step = -1;
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if (dy > dx) { /* chooses axis of greatest movement (make dx) */
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SL_SWAP(x1, y1);
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SL_SWAP(x2, y2);
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SL_SWAP(dx, dy);
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reverse = 1;
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} else
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reverse = 0;
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/* note error check for dx==0 should be included here */
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if (x1 > x2) { /* start from the smaller coordinate */
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x = x2;
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y = y2;
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/* x1 = x1;
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y1 = y1; */
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} else {
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x = x1;
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y = y1;
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x1 = x2;
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y1 = y2;
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}
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/* Note dx=n implies 0 - n or (dx+1) pixels to be set */
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/* Go round loop dx/4 times then plot last 0,1,2 or 3 pixels */
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/* In fact (dx-1)/4 as 2 pixels are already plotted */
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xend = (dx - 1) / 4;
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pixels_left = (dx - 1) % 4; /* number of pixels left over at the
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* end */
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plot(object, x, y, reverse, color);
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if (pixels_left < 0)
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return; /* plot only one pixel for zero length
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* vectors */
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plot(object, x1, y1, reverse, color); /* plot first two points */
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incr2 = 4 * dy - 2 * dx;
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if (incr2 < 0) { /* slope less than 1/2 */
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c = 2 * dy;
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incr1 = 2 * c;
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D = incr1 - dx;
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for (i = 0; i < xend; i++) { /* plotting loop */
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++x;
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--x1;
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if (D < 0) {
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/* pattern 1 forwards */
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plot(object, x, y, reverse, color);
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plot(object, ++x, y, reverse, color);
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/* pattern 1 backwards */
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plot(object, x1, y1, reverse, color);
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plot(object, --x1, y1, reverse, color);
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D += incr1;
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} else {
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if (D < c) {
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/* pattern 2 forwards */
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plot(object, x, y, reverse, color);
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plot(object, ++x, y += step, reverse,
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color);
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/* pattern 2 backwards */
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plot(object, x1, y1, reverse, color);
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plot(object, --x1, y1 -= step, reverse,
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color);
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} else {
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/* pattern 3 forwards */
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plot(object, x, y += step, reverse, color);
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plot(object, ++x, y, reverse, color);
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/* pattern 3 backwards */
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plot(object, x1, y1 -= step, reverse,
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color);
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plot(object, --x1, y1, reverse, color);
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}
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D += incr2;
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}
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} /* end for */
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/* plot last pattern */
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if (pixels_left) {
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if (D < 0) {
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plot(object, ++x, y, reverse, color); /* pattern 1 */
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if (pixels_left > 1)
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plot(object, ++x, y, reverse, color);
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if (pixels_left > 2)
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plot(object, --x1, y1, reverse, color);
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} else {
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if (D < c) {
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plot(object, ++x, y, reverse, color); /* pattern 2 */
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if (pixels_left > 1)
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plot(object, ++x, y += step, reverse, color);
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if (pixels_left > 2)
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plot(object, --x1, y1, reverse, color);
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} else {
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/* pattern 3 */
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plot(object, ++x, y += step, reverse, color);
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if (pixels_left > 1)
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plot(object, ++x, y, reverse, color);
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if (pixels_left > 2)
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plot(object, --x1, y1 -= step, reverse, color);
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}
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}
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} /* end if pixels_left */
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}
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/* end slope < 1/2 */
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else { /* slope greater than 1/2 */
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c = 2 * (dy - dx);
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incr1 = 2 * c;
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D = incr1 + dx;
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for (i = 0; i < xend; i++) {
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++x;
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--x1;
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if (D > 0) {
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/* pattern 4 forwards */
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plot(object, x, y += step, reverse, color);
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plot(object, ++x, y += step, reverse, color);
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/* pattern 4 backwards */
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plot(object, x1, y1 -= step, reverse, color);
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plot(object, --x1, y1 -= step, reverse, color);
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D += incr1;
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} else {
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if (D < c) {
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/* pattern 2 forwards */
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plot(object, x, y, reverse, color);
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plot(object, ++x, y += step, reverse,
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color);
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/* pattern 2 backwards */
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plot(object, x1, y1, reverse, color);
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plot(object, --x1, y1 -= step, reverse,
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color);
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} else {
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/* pattern 3 forwards */
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plot(object, x, y += step, reverse, color);
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plot(object, ++x, y, reverse, color);
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/* pattern 3 backwards */
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plot(object, x1, y1 -= step, reverse, color);
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plot(object, --x1, y1, reverse, color);
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}
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D += incr2;
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}
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} /* end for */
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/* plot last pattern */
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if (pixels_left) {
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if (D > 0) {
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plot(object, ++x, y += step, reverse, color); /* pattern 4 */
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if (pixels_left > 1)
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plot(object, ++x, y += step, reverse,
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color);
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if (pixels_left > 2)
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plot(object, --x1, y1 -= step, reverse,
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color);
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} else {
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if (D < c) {
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plot(object, ++x, y, reverse, color); /* pattern 2 */
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if (pixels_left > 1)
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plot(object, ++x, y += step, reverse, color);
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if (pixels_left > 2)
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plot(object, --x1, y1, reverse, color);
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} else {
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/* pattern 3 */
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plot(object, ++x, y += step, reverse, color);
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if (pixels_left > 1)
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plot(object, ++x, y, reverse, color);
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if (pixels_left > 2) {
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if (D > c) /* step 3 */
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plot(object, --x1, y1 -= step, reverse, color);
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else /* step 2 */
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plot(object, --x1, y1, reverse, color);
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}
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}
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}
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}
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}
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}
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void
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VGLBox(VGLBitmap *object, int x1, int y1, int x2, int y2, u_long color)
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{
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VGLLine(object, x1, y1, x2, y1, color);
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VGLLine(object, x2, y1, x2, y2, color);
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VGLLine(object, x2, y2, x1, y2, color);
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VGLLine(object, x1, y2, x1, y1, color);
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}
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void
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VGLFilledBox(VGLBitmap *object, int x1, int y1, int x2, int y2, u_long color)
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{
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int y;
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for (y=y1; y<=y2; y++) VGLLine(object, x1, y, x2, y, color);
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}
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static inline void
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set4pixels(VGLBitmap *object, int x, int y, int xc, int yc, u_long color)
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{
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if (x!=0) {
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VGLSetXY(object, xc+x, yc+y, color);
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VGLSetXY(object, xc-x, yc+y, color);
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if (y!=0) {
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VGLSetXY(object, xc+x, yc-y, color);
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VGLSetXY(object, xc-x, yc-y, color);
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}
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}
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else {
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VGLSetXY(object, xc, yc+y, color);
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if (y!=0)
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VGLSetXY(object, xc, yc-y, color);
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}
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}
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void
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VGLEllipse(VGLBitmap *object, int xc, int yc, int a, int b, u_long color)
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{
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int x = 0, y = b, asq = a*a, asq2 = a*a*2, bsq = b*b;
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int bsq2 = b*b*2, d = bsq-asq*b+asq/4, dx = 0, dy = asq2*b;
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while (dx<dy) {
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set4pixels(object, x, y, xc, yc, color);
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if (d>0) {
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y--; dy-=asq2; d-=dy;
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}
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x++; dx+=bsq2; d+=bsq+dx;
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}
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d+=(3*(asq-bsq)/2-(dx+dy))/2;
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while (y>=0) {
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set4pixels(object, x, y, xc, yc, color);
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if (d<0) {
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x++; dx+=bsq2; d+=dx;
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}
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y--; dy-=asq2; d+=asq-dy;
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}
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}
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static inline void
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set2lines(VGLBitmap *object, int x, int y, int xc, int yc, u_long color)
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{
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if (x!=0) {
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VGLLine(object, xc+x, yc+y, xc-x, yc+y, color);
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if (y!=0)
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VGLLine(object, xc+x, yc-y, xc-x, yc-y, color);
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}
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else {
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VGLLine(object, xc, yc+y, xc, yc-y, color);
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}
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}
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void
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VGLFilledEllipse(VGLBitmap *object, int xc, int yc, int a, int b, u_long color)
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{
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int x = 0, y = b, asq = a*a, asq2 = a*a*2, bsq = b*b;
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int bsq2 = b*b*2, d = bsq-asq*b+asq/4, dx = 0, dy = asq2*b;
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while (dx<dy) {
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set2lines(object, x, y, xc, yc, color);
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if (d>0) {
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y--; dy-=asq2; d-=dy;
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}
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x++; dx+=bsq2; d+=bsq+dx;
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}
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d+=(3*(asq-bsq)/2-(dx+dy))/2;
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while (y>=0) {
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set2lines(object, x, y, xc, yc, color);
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if (d<0) {
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x++; dx+=bsq2; d+=dx;
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}
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y--; dy-=asq2; d+=asq-dy;
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}
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}
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void
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VGLClear(VGLBitmap *object, u_long color)
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{
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VGLBitmap src;
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int i, len, mousemode, offset;
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VGLCheckSwitch();
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if (object == VGLDisplay) {
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VGLMouseFreeze();
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VGLClear(&VGLVDisplay, color);
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} else if (object->Type != MEMBUF)
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return; /* invalid */
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switch (object->Type) {
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case MEMBUF:
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case VIDBUF8:
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case VIDBUF8S:
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case VIDBUF16:
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case VIDBUF16S:
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|
case VIDBUF24:
|
|
case VIDBUF24S:
|
|
case VIDBUF32:
|
|
case VIDBUF32S:
|
|
src.Type = MEMBUF;
|
|
src.Xsize = object->Xsize;
|
|
src.VXsize = object->VXsize;
|
|
src.Ysize = 1;
|
|
src.VYsize = 1;
|
|
src.Xorigin = 0;
|
|
src.Yorigin = 0;
|
|
src.Bitmap = alloca(object->VXsize * object->PixelBytes);
|
|
src.PixelBytes = object->PixelBytes;
|
|
color = htole32(color);
|
|
for (i = 0; i < object->VXsize; i++)
|
|
bcopy(&color, src.Bitmap + i * object->PixelBytes, object->PixelBytes);
|
|
for (i = 0; i < object->VYsize; i++)
|
|
__VGLBitmapCopy(&src, 0, 0, object, 0, i, object->VXsize, -1);
|
|
break;
|
|
|
|
case VIDBUF8X:
|
|
mousemode = __VGLMouseMode(VGL_MOUSEHIDE);
|
|
/* XXX works only for Xsize % 4 = 0 */
|
|
outb(0x3c6, 0xff);
|
|
outb(0x3c4, 0x02); outb(0x3c5, 0x0f);
|
|
memset(object->Bitmap, (byte)color, VGLAdpInfo.va_line_width*object->VYsize);
|
|
__VGLMouseMode(mousemode);
|
|
break;
|
|
|
|
case VIDBUF4:
|
|
case VIDBUF4S:
|
|
mousemode = __VGLMouseMode(VGL_MOUSEHIDE);
|
|
/* XXX works only for Xsize % 8 = 0 */
|
|
outb(0x3c4, 0x02); outb(0x3c5, 0x0f);
|
|
outb(0x3ce, 0x05); outb(0x3cf, 0x02); /* mode 2 */
|
|
outb(0x3ce, 0x01); outb(0x3cf, 0x00); /* set/reset enable */
|
|
outb(0x3ce, 0x08); outb(0x3cf, 0xff); /* bit mask */
|
|
for (offset = 0; offset < VGLAdpInfo.va_line_width*object->VYsize; ) {
|
|
VGLSetSegment(offset);
|
|
len = min(object->VXsize*object->VYsize - offset,
|
|
VGLAdpInfo.va_window_size);
|
|
memset(object->Bitmap, (byte)color, len);
|
|
offset += len;
|
|
}
|
|
outb(0x3ce, 0x05); outb(0x3cf, 0x00);
|
|
__VGLMouseMode(mousemode);
|
|
break;
|
|
}
|
|
if (object == VGLDisplay)
|
|
VGLMouseUnFreeze();
|
|
}
|
|
|
|
static inline u_long
|
|
VGLrgbToNative(uint16_t r, uint16_t g, uint16_t b)
|
|
{
|
|
int nr, ng, nb;
|
|
|
|
nr = VGLModeInfo.vi_pixel_fsizes[2];
|
|
ng = VGLModeInfo.vi_pixel_fsizes[1];
|
|
nb = VGLModeInfo.vi_pixel_fsizes[0];
|
|
return (r >> (16 - nr) << (ng + nb)) | (g >> (16 - ng) << nb) |
|
|
(b >> (16 - nb) << 0);
|
|
}
|
|
|
|
u_long
|
|
VGLrgb332ToNative(byte c)
|
|
{
|
|
uint16_t r, g, b;
|
|
|
|
/* 3:3:2 to 16:16:16 */
|
|
r = ((c & 0xe0) >> 5) * 0xffff / 7;
|
|
g = ((c & 0x1c) >> 2) * 0xffff / 7;
|
|
b = ((c & 0x03) >> 0) * 0xffff / 3;
|
|
|
|
return VGLrgbToNative(r, g, b);
|
|
}
|
|
|
|
void
|
|
VGLRestorePalette()
|
|
{
|
|
int i;
|
|
|
|
if (VGLModeInfo.vi_mem_model == V_INFO_MM_DIRECT)
|
|
return;
|
|
outb(0x3C6, 0xFF);
|
|
inb(0x3DA);
|
|
outb(0x3C8, 0x00);
|
|
for (i=0; i<256; i++) {
|
|
outb(0x3C9, VGLSavePaletteRed[i]);
|
|
inb(0x84);
|
|
outb(0x3C9, VGLSavePaletteGreen[i]);
|
|
inb(0x84);
|
|
outb(0x3C9, VGLSavePaletteBlue[i]);
|
|
inb(0x84);
|
|
}
|
|
inb(0x3DA);
|
|
outb(0x3C0, 0x20);
|
|
}
|
|
|
|
void
|
|
VGLSavePalette()
|
|
{
|
|
int i;
|
|
|
|
if (VGLModeInfo.vi_mem_model == V_INFO_MM_DIRECT)
|
|
return;
|
|
outb(0x3C6, 0xFF);
|
|
inb(0x3DA);
|
|
outb(0x3C7, 0x00);
|
|
for (i=0; i<256; i++) {
|
|
VGLSavePaletteRed[i] = inb(0x3C9);
|
|
inb(0x84);
|
|
VGLSavePaletteGreen[i] = inb(0x3C9);
|
|
inb(0x84);
|
|
VGLSavePaletteBlue[i] = inb(0x3C9);
|
|
inb(0x84);
|
|
}
|
|
inb(0x3DA);
|
|
outb(0x3C0, 0x20);
|
|
}
|
|
|
|
void
|
|
VGLSetPalette(byte *red, byte *green, byte *blue)
|
|
{
|
|
int i;
|
|
|
|
if (VGLModeInfo.vi_mem_model == V_INFO_MM_DIRECT)
|
|
return;
|
|
for (i=0; i<256; i++) {
|
|
VGLSavePaletteRed[i] = red[i];
|
|
VGLSavePaletteGreen[i] = green[i];
|
|
VGLSavePaletteBlue[i] = blue[i];
|
|
}
|
|
VGLCheckSwitch();
|
|
outb(0x3C6, 0xFF);
|
|
inb(0x3DA);
|
|
outb(0x3C8, 0x00);
|
|
for (i=0; i<256; i++) {
|
|
outb(0x3C9, VGLSavePaletteRed[i]);
|
|
inb(0x84);
|
|
outb(0x3C9, VGLSavePaletteGreen[i]);
|
|
inb(0x84);
|
|
outb(0x3C9, VGLSavePaletteBlue[i]);
|
|
inb(0x84);
|
|
}
|
|
inb(0x3DA);
|
|
outb(0x3C0, 0x20);
|
|
}
|
|
|
|
void
|
|
VGLSetPaletteIndex(byte color, byte red, byte green, byte blue)
|
|
{
|
|
if (VGLModeInfo.vi_mem_model == V_INFO_MM_DIRECT)
|
|
return;
|
|
VGLSavePaletteRed[color] = red;
|
|
VGLSavePaletteGreen[color] = green;
|
|
VGLSavePaletteBlue[color] = blue;
|
|
VGLCheckSwitch();
|
|
outb(0x3C6, 0xFF);
|
|
inb(0x3DA);
|
|
outb(0x3C8, color);
|
|
outb(0x3C9, red); outb(0x3C9, green); outb(0x3C9, blue);
|
|
inb(0x3DA);
|
|
outb(0x3C0, 0x20);
|
|
}
|
|
|
|
void
|
|
VGLRestoreBorder(void)
|
|
{
|
|
VGLSetBorder(VGLBorderColor);
|
|
}
|
|
|
|
void
|
|
VGLSetBorder(byte color)
|
|
{
|
|
if (VGLModeInfo.vi_mem_model == V_INFO_MM_DIRECT && ioctl(0, KDENABIO, 0))
|
|
return;
|
|
VGLCheckSwitch();
|
|
inb(0x3DA);
|
|
outb(0x3C0,0x11); outb(0x3C0, color);
|
|
inb(0x3DA);
|
|
outb(0x3C0, 0x20);
|
|
VGLBorderColor = color;
|
|
if (VGLModeInfo.vi_mem_model == V_INFO_MM_DIRECT)
|
|
ioctl(0, KDDISABIO, 0);
|
|
}
|
|
|
|
void
|
|
VGLRestoreBlank(void)
|
|
{
|
|
VGLBlankDisplay(VGLBlank);
|
|
}
|
|
|
|
void
|
|
VGLBlankDisplay(int blank)
|
|
{
|
|
byte val;
|
|
|
|
if (VGLModeInfo.vi_mem_model == V_INFO_MM_DIRECT && ioctl(0, KDENABIO, 0))
|
|
return;
|
|
VGLCheckSwitch();
|
|
outb(0x3C4, 0x01); val = inb(0x3C5); outb(0x3C4, 0x01);
|
|
outb(0x3C5, ((blank) ? (val |= 0x20) : (val &= 0xDF)));
|
|
VGLBlank = blank;
|
|
if (VGLModeInfo.vi_mem_model == V_INFO_MM_DIRECT)
|
|
ioctl(0, KDDISABIO, 0);
|
|
}
|