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230 lines
6.9 KiB
C
230 lines
6.9 KiB
C
/*-
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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 withough 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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* $Id: bitmap.c,v 1.8 1997/08/15 12:32:59 sos Exp $
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*/
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#include <sys/types.h>
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#include <signal.h>
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#include "vgl.h"
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static byte VGLPlane[4][128];
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static byte mask[8] = {0xff, 0x7f, 0x3f, 0x1f, 0x0f, 0x07, 0x03, 0x01};
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static int color2bit[16] = {0x00000000, 0x00000001, 0x00000100, 0x00000101,
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0x00010000, 0x00010001, 0x00010100, 0x00010101,
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0x01000000, 0x01000001, 0x01000100, 0x01000101,
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0x01010000, 0x01010001, 0x01010100, 0x01010101};
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static void
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WriteVerticalLine(VGLBitmap *dst, int x, int y, int width, byte *line)
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{
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int i, pos, last, planepos, start_offset, end_offset, offset;
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unsigned int word = 0;
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byte *address;
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switch (dst->Type) {
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case VIDBUF4:
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address = dst->Bitmap + (dst->Xsize/8 * y) + x/8;
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start_offset = (x & 0x07);
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end_offset = (x + width) & 0x07;
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offset = start_offset;
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pos = 0;
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planepos = 0;
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while (pos < width) {
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word = 0;
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last = pos + 8 - offset;
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while (pos < last && pos < width)
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word = (word<<1) | color2bit[line[pos++]&0x0f];
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VGLPlane[0][planepos] = word;
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VGLPlane[1][planepos] = word>>8;
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VGLPlane[2][planepos] = word>>16;
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VGLPlane[3][planepos] = word>>24;
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planepos++;
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offset = 0;
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}
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planepos--;
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if (end_offset) {
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word <<= (8 - end_offset);
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VGLPlane[0][planepos] = word;
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VGLPlane[1][planepos] = word>>8;
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VGLPlane[2][planepos] = word>>16;
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VGLPlane[3][planepos] = word>>24;
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}
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if (start_offset || end_offset)
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width+=8;
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for (i=0; i<4; i++) {
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outb(0x3c4, 0x02);
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outb(0x3c5, 0x01<<i);
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outb(0x3ce, 0x04);
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outb(0x3cf, i);
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if (start_offset)
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VGLPlane[i][0] |= *address & ~mask[start_offset];
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if (end_offset)
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VGLPlane[i][planepos] |= *(address + planepos) & mask[end_offset];
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bcopy(&VGLPlane[i][0], address, width/8);
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}
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break;
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case VIDBUF8X:
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address = dst->Bitmap + ((dst->Xsize * y) + x)/2;
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for (i=0; i<4; i++) {
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outb(0x3c4, 0x02);
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outb(0x3c5, 0x01<<i);
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pos = i;
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for (planepos=0; planepos<width/4; planepos++, pos+=4)
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address[planepos] = line[pos];
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}
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break;
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case VIDBUF8:
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case MEMBUF:
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address = dst->Bitmap + (dst->Xsize * y) + x;
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bcopy(line, address, width);
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break;
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default:
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}
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}
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static void
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ReadVerticalLine(VGLBitmap *src, int x, int y, int width, byte *line)
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{
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int i, bit, pos, count, planepos, start_offset, end_offset, offset;
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byte *address;
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switch (src->Type) {
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case VIDBUF4:
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address = src->Bitmap + (src->Xsize/8 * y) + x/8;
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start_offset = (x & 0x07);
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end_offset = (x + width) & 0x07;
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offset = start_offset;
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if (start_offset)
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count = (width - (8 - start_offset)) / 8 + 1;
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else
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count = width / 8;
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if (end_offset)
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count++;
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for (i=0; i<4; i++) {
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outb(0x3ce, 0x04);
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outb(0x3cf, i);
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bcopy(address, &VGLPlane[i][0], count);
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}
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pos = 0;
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planepos = 0;
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while (pos < width) {
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for (bit = (7-offset); bit >= 0 && pos < width; bit--, pos++) {
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line[pos] = (VGLPlane[0][planepos] & (1<<bit) ? 1 : 0) |
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((VGLPlane[1][planepos] & (1<<bit) ? 1 : 0) << 1) |
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((VGLPlane[2][planepos] & (1<<bit) ? 1 : 0) << 2) |
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((VGLPlane[3][planepos] & (1<<bit) ? 1 : 0) << 3);
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}
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planepos++;
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offset = 0;
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}
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break;
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case VIDBUF8X:
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address = src->Bitmap + ((src->Xsize * y) + x)/2;
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for (i=0; i<4; i++) {
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outb(0x3ce, 0x04);
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outb(0x3cf, i);
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pos = i;
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for (planepos=0; planepos<width/4; planepos++, pos+=4)
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line[pos] = address[planepos];
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}
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break;
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case VIDBUF8:
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case MEMBUF:
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address = src->Bitmap + (src->Xsize * y) + x;
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bcopy(address, line, width);
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break;
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default:
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}
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}
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int
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__VGLBitmapCopy(VGLBitmap *src, int srcx, int srcy,
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VGLBitmap *dst, int dstx, int dsty, int width, int hight)
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{
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int srcline, dstline;
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if (srcx>src->Xsize||srcy>src->Ysize||dsty>dst->Xsize||dsty>dst->Ysize)
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return -1;
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if (srcx < 0) {
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width=width+srcx; dstx-=srcx; srcx=0;
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}
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if (srcy < 0) {
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hight=hight+srcy; dsty-=srcy; srcy=0;
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}
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if (dstx < 0) {
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width=width+dstx; srcx-=dstx; dstx=0;
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}
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if (dsty < 0) {
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hight=hight+dsty; srcy-=dsty; dsty=0;
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}
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if (srcx+width > src->Xsize)
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width=src->Xsize-srcx;
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if (srcy+hight > src->Ysize)
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hight=src->Ysize-srcy;
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if (dstx+width > dst->Xsize)
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width=dst->Xsize-dstx;
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if (dsty+hight > dst->Ysize)
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hight=dst->Ysize-dsty;
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if (width < 0 || hight < 0)
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return -1;
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if (src->Type == MEMBUF) {
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for (srcline=srcy, dstline=dsty; srcline<srcy+hight; srcline++, dstline++) {
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WriteVerticalLine(dst, dstx, dstline, width,
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(src->Bitmap+(srcline*src->Xsize)+srcx));
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}
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}
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else if (dst->Type == MEMBUF) {
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for (srcline=srcy, dstline=dsty; srcline<srcy+hight; srcline++, dstline++) {
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ReadVerticalLine(src, srcx, srcline, width,
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(dst->Bitmap+(dstline*dst->Xsize)+dstx));
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}
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}
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else {
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byte buffer[1024];
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for (srcline=srcy, dstline=dsty; srcline<srcy+hight; srcline++, dstline++) {
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ReadVerticalLine(src, srcx, srcline, width, buffer);
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WriteVerticalLine(dst, dstx, dstline, width, buffer);
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}
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}
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return 0;
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}
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int
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VGLBitmapCopy(VGLBitmap *src, int srcx, int srcy,
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VGLBitmap *dst, int dstx, int dsty, int width, int hight)
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{
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int error;
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VGLMouseFreeze(dstx, dsty, width, hight, 0);
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error = __VGLBitmapCopy(src, srcx, srcy, dst, dstx, dsty, width, hight);
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VGLMouseUnFreeze();
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return error;
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}
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