/*-
* Copyright (c) 1991-1997 Søren Schmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* in this position and unchanged.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software withough specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: bitmap.c,v 1.8 1997/08/15 12:32:59 sos Exp $
*/
#include <sys/types.h>
#include <signal.h>
#include "vgl.h"
static byte VGLPlane[4][128];
static byte mask[8] = {0xff, 0x7f, 0x3f, 0x1f, 0x0f, 0x07, 0x03, 0x01};
static int color2bit[16] = {0x00000000, 0x00000001, 0x00000100, 0x00000101,
0x00010000, 0x00010001, 0x00010100, 0x00010101,
0x01000000, 0x01000001, 0x01000100, 0x01000101,
0x01010000, 0x01010001, 0x01010100, 0x01010101};
static void
WriteVerticalLine(VGLBitmap *dst, int x, int y, int width, byte *line)
{
int i, pos, last, planepos, start_offset, end_offset, offset;
unsigned int word = 0;
byte *address;
switch (dst->Type) {
case VIDBUF4:
address = dst->Bitmap + (dst->Xsize/8 * y) + x/8;
start_offset = (x & 0x07);
end_offset = (x + width) & 0x07;
offset = start_offset;
pos = 0;
planepos = 0;
while (pos < width) {
word = 0;
last = pos + 8 - offset;
while (pos < last && pos < width)
word = (word<<1) | color2bit[line[pos++]&0x0f];
VGLPlane[0][planepos] = word;
VGLPlane[1][planepos] = word>>8;
VGLPlane[2][planepos] = word>>16;
VGLPlane[3][planepos] = word>>24;
planepos++;
offset = 0;
}
planepos--;
if (end_offset) {
word <<= (8 - end_offset);
VGLPlane[0][planepos] = word;
VGLPlane[1][planepos] = word>>8;
VGLPlane[2][planepos] = word>>16;
VGLPlane[3][planepos] = word>>24;
}
if (start_offset || end_offset)
width+=8;
for (i=0; i<4; i++) {
outb(0x3c4, 0x02);
outb(0x3c5, 0x01<<i);
outb(0x3ce, 0x04);
outb(0x3cf, i);
if (start_offset)
VGLPlane[i][0] |= *address & ~mask[start_offset];
if (end_offset)
VGLPlane[i][planepos] |= *(address + planepos) & mask[end_offset];
bcopy(&VGLPlane[i][0], address, width/8);
}
break;
case VIDBUF8X:
address = dst->Bitmap + ((dst->Xsize * y) + x)/2;
for (i=0; i<4; i++) {
outb(0x3c4, 0x02);
outb(0x3c5, 0x01<<i);
pos = i;
for (planepos=0; planepos<width/4; planepos++, pos+=4)
address[planepos] = line[pos];
}
break;
case VIDBUF8:
case MEMBUF:
address = dst->Bitmap + (dst->Xsize * y) + x;
bcopy(line, address, width);
break;
default:
}
}
static void
ReadVerticalLine(VGLBitmap *src, int x, int y, int width, byte *line)
{
int i, bit, pos, count, planepos, start_offset, end_offset, offset;
byte *address;
switch (src->Type) {
case VIDBUF4:
address = src->Bitmap + (src->Xsize/8 * y) + x/8;
start_offset = (x & 0x07);
end_offset = (x + width) & 0x07;
offset = start_offset;
if (start_offset)
count = (width - (8 - start_offset)) / 8 + 1;
else
count = width / 8;
if (end_offset)
count++;
for (i=0; i<4; i++) {
outb(0x3ce, 0x04);
outb(0x3cf, i);
bcopy(address, &VGLPlane[i][0], count);
}
pos = 0;
planepos = 0;
while (pos < width) {
for (bit = (7-offset); bit >= 0 && pos < width; bit--, pos++) {
line[pos] = (VGLPlane[0][planepos] & (1<<bit) ? 1 : 0) |
((VGLPlane[1][planepos] & (1<<bit) ? 1 : 0) << 1) |
((VGLPlane[2][planepos] & (1<<bit) ? 1 : 0) << 2) |
((VGLPlane[3][planepos] & (1<<bit) ? 1 : 0) << 3);
}
planepos++;
offset = 0;
}
break;
case VIDBUF8X:
address = src->Bitmap + ((src->Xsize * y) + x)/2;
for (i=0; i<4; i++) {
outb(0x3ce, 0x04);
outb(0x3cf, i);
pos = i;
for (planepos=0; planepos<width/4; planepos++, pos+=4)
line[pos] = address[planepos];
}
break;
case VIDBUF8:
case MEMBUF:
address = src->Bitmap + (src->Xsize * y) + x;
bcopy(address, line, width);
break;
default:
}
}
int
__VGLBitmapCopy(VGLBitmap *src, int srcx, int srcy,
VGLBitmap *dst, int dstx, int dsty, int width, int hight)
{
int srcline, dstline;
if (srcx>src->Xsize||srcy>src->Ysize||dsty>dst->Xsize||dsty>dst->Ysize)
return -1;
if (srcx < 0) {
width=width+srcx; dstx-=srcx; srcx=0;
}
if (srcy < 0) {
hight=hight+srcy; dsty-=srcy; srcy=0;
}
if (dstx < 0) {
width=width+dstx; srcx-=dstx; dstx=0;
}
if (dsty < 0) {
hight=hight+dsty; srcy-=dsty; dsty=0;
}
if (srcx+width > src->Xsize)
width=src->Xsize-srcx;
if (srcy+hight > src->Ysize)
hight=src->Ysize-srcy;
if (dstx+width > dst->Xsize)
width=dst->Xsize-dstx;
if (dsty+hight > dst->Ysize)
hight=dst->Ysize-dsty;
if (width < 0 || hight < 0)
return -1;
if (src->Type == MEMBUF) {
for (srcline=srcy, dstline=dsty; srcline<srcy+hight; srcline++, dstline++) {
WriteVerticalLine(dst, dstx, dstline, width,
(src->Bitmap+(srcline*src->Xsize)+srcx));
}
}
else if (dst->Type == MEMBUF) {
for (srcline=srcy, dstline=dsty; srcline<srcy+hight; srcline++, dstline++) {
ReadVerticalLine(src, srcx, srcline, width,
(dst->Bitmap+(dstline*dst->Xsize)+dstx));
}
}
else {
byte buffer[1024];
for (srcline=srcy, dstline=dsty; srcline<srcy+hight; srcline++, dstline++) {
ReadVerticalLine(src, srcx, srcline, width, buffer);
WriteVerticalLine(dst, dstx, dstline, width, buffer);
}
}
return 0;
}
int
VGLBitmapCopy(VGLBitmap *src, int srcx, int srcy,
VGLBitmap *dst, int dstx, int dsty, int width, int hight)
{
int error;
VGLMouseFreeze(dstx, dsty, width, hight, 0);
error = __VGLBitmapCopy(src, srcx, srcy, dst, dstx, dsty, width, hight);
VGLMouseUnFreeze();
return error;
}