FreeBSD-5.3/lib/libvgl/bitmap.c
/*-
* 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 without 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libvgl/bitmap.c,v 1.9 2002/06/02 20:05:39 schweikh Exp $");
#include <sys/types.h>
#include <signal.h>
#include <sys/fbio.h>
#include "vgl.h"
#define min(x, y) (((x) < (y)) ? (x) : (y))
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;
int len;
unsigned int word = 0;
byte *address;
byte *VGLPlane[4];
switch (dst->Type) {
case VIDBUF4:
case VIDBUF4S:
start_offset = (x & 0x07);
end_offset = (x + width) & 0x07;
i = (width + start_offset) / 8;
if (end_offset)
i++;
VGLPlane[0] = VGLBuf;
VGLPlane[1] = VGLPlane[0] + i;
VGLPlane[2] = VGLPlane[1] + i;
VGLPlane[3] = VGLPlane[2] + i;
pos = 0;
planepos = 0;
last = 8 - start_offset;
while (pos < width) {
word = 0;
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++;
last += 8;
}
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;
width /= 8;
outb(0x3ce, 0x01); outb(0x3cf, 0x00); /* set/reset enable */
outb(0x3ce, 0x08); outb(0x3cf, 0xff); /* bit mask */
for (i=0; i<4; i++) {
outb(0x3c4, 0x02);
outb(0x3c5, 0x01<<i);
outb(0x3ce, 0x04);
outb(0x3cf, i);
pos = VGLAdpInfo.va_line_width*y + x/8;
if (dst->Type == VIDBUF4) {
if (end_offset)
VGLPlane[i][planepos] |= dst->Bitmap[pos+planepos] & mask[end_offset];
if (start_offset)
VGLPlane[i][0] |= dst->Bitmap[pos] & ~mask[start_offset];
bcopy(&VGLPlane[i][0], dst->Bitmap + pos, width);
} else { /* VIDBUF4S */
if (end_offset) {
offset = VGLSetSegment(pos + planepos);
VGLPlane[i][planepos] |= dst->Bitmap[offset] & mask[end_offset];
}
offset = VGLSetSegment(pos);
if (start_offset)
VGLPlane[i][0] |= dst->Bitmap[offset] & ~mask[start_offset];
for (last = width; ; ) {
len = min(VGLAdpInfo.va_window_size - offset, last);
bcopy(&VGLPlane[i][width - last], dst->Bitmap + offset, len);
pos += len;
last -= len;
if (last <= 0)
break;
offset = VGLSetSegment(pos);
}
}
}
break;
case VIDBUF8X:
address = dst->Bitmap + VGLAdpInfo.va_line_width * y + x/4;
for (i=0; i<4; i++) {
outb(0x3c4, 0x02);
outb(0x3c5, 0x01 << ((x + i)%4));
for (planepos=0, pos=i; pos<width; planepos++, pos+=4)
address[planepos] = line[pos];
if ((x + i)%4 == 3)
++address;
}
break;
case VIDBUF8S:
pos = dst->VXsize * y + x;
while (width > 0) {
offset = VGLSetSegment(pos);
i = min(VGLAdpInfo.va_window_size - offset, width);
bcopy(line, dst->Bitmap + offset, i);
line += i;
pos += i;
width -= i;
}
break;
case VIDBUF16S:
case VIDBUF24S:
case VIDBUF32S:
width = width * dst->PixelBytes;
pos = (dst->VXsize * y + x) * dst->PixelBytes;
while (width > 0) {
offset = VGLSetSegment(pos);
i = min(VGLAdpInfo.va_window_size - offset, width);
bcopy(line, dst->Bitmap + offset, i);
line += i;
pos += i;
width -= i;
}
break;
case VIDBUF8:
case MEMBUF:
address = dst->Bitmap + dst->VXsize * y + x;
bcopy(line, address, width);
break;
case VIDBUF16:
case VIDBUF24:
case VIDBUF32:
address = dst->Bitmap + (dst->VXsize * y + x) * dst->PixelBytes;
bcopy(line, address, width * dst->PixelBytes);
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;
int width2, len;
byte *address;
byte *VGLPlane[4];
switch (src->Type) {
case VIDBUF4S:
start_offset = (x & 0x07);
end_offset = (x + width) & 0x07;
count = (width + start_offset) / 8;
if (end_offset)
count++;
VGLPlane[0] = VGLBuf;
VGLPlane[1] = VGLPlane[0] + count;
VGLPlane[2] = VGLPlane[1] + count;
VGLPlane[3] = VGLPlane[2] + count;
for (i=0; i<4; i++) {
outb(0x3ce, 0x04);
outb(0x3cf, i);
pos = VGLAdpInfo.va_line_width*y + x/8;
for (width2 = count; width2 > 0; ) {
offset = VGLSetSegment(pos);
len = min(VGLAdpInfo.va_window_size - offset, width2);
bcopy(src->Bitmap + offset, &VGLPlane[i][count - width2], len);
pos += len;
width2 -= len;
}
}
goto read_planar;
case VIDBUF4:
address = src->Bitmap + VGLAdpInfo.va_line_width * y + x/8;
start_offset = (x & 0x07);
end_offset = (x + width) & 0x07;
count = (width + start_offset) / 8;
if (end_offset)
count++;
VGLPlane[0] = VGLBuf;
VGLPlane[1] = VGLPlane[0] + count;
VGLPlane[2] = VGLPlane[1] + count;
VGLPlane[3] = VGLPlane[2] + count;
for (i=0; i<4; i++) {
outb(0x3ce, 0x04);
outb(0x3cf, i);
bcopy(address, &VGLPlane[i][0], count);
}
read_planar:
pos = 0;
planepos = 0;
bit = 7 - start_offset;
while (pos < width) {
for (; 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++;
bit = 7;
}
break;
case VIDBUF8X:
address = src->Bitmap + VGLAdpInfo.va_line_width * y + x/4;
for (i=0; i<4; i++) {
outb(0x3ce, 0x04);
outb(0x3cf, (x + i)%4);
for (planepos=0, pos=i; pos<width; planepos++, pos+=4)
line[pos] = address[planepos];
if ((x + i)%4 == 3)
++address;
}
break;
case VIDBUF8S:
pos = src->VXsize * y + x;
while (width > 0) {
offset = VGLSetSegment(pos);
i = min(VGLAdpInfo.va_window_size - offset, width);
bcopy(src->Bitmap + offset, line, i);
line += i;
pos += i;
width -= i;
}
break;
case VIDBUF16S:
case VIDBUF24S:
case VIDBUF32S:
width = width * src->PixelBytes;
pos = (src->VXsize * y + x) * src->PixelBytes;
while (width > 0) {
offset = VGLSetSegment(pos);
i = min(VGLAdpInfo.va_window_size - offset, width);
bcopy(src->Bitmap + offset, line, i);
line += i;
pos += i;
width -= i;
}
break;
case VIDBUF8:
case MEMBUF:
address = src->Bitmap + src->VXsize * y + x;
bcopy(address, line, width);
break;
case VIDBUF16:
case VIDBUF24:
case VIDBUF32:
address = src->Bitmap + (src->VXsize * y + x) * src->PixelBytes;
bcopy(address, line, width * src->PixelBytes);
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->VXsize || srcy>src->VYsize
|| dstx>dst->VXsize || dsty>dst->VYsize)
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->VXsize)
width=src->VXsize-srcx;
if (srcy+hight > src->VYsize)
hight=src->VYsize-srcy;
if (dstx+width > dst->VXsize)
width=dst->VXsize-dstx;
if (dsty+hight > dst->VYsize)
hight=dst->VYsize-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->VXsize)+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->VXsize)+dstx));
}
}
else {
byte buffer[2048]; /* XXX */
byte *p;
if (width > sizeof(buffer)) {
p = malloc(width);
if (p == NULL)
return 1;
} else {
p = buffer;
}
for (srcline=srcy, dstline=dsty; srcline<srcy+hight; srcline++, dstline++) {
ReadVerticalLine(src, srcx, srcline, width, p);
WriteVerticalLine(dst, dstx, dstline, width, p);
}
if (width > sizeof(buffer))
free(p);
}
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;
}
VGLBitmap
*VGLBitmapCreate(int type, int xsize, int ysize, byte *bits)
{
VGLBitmap *object;
if (type != MEMBUF)
return NULL;
if (xsize < 0 || ysize < 0)
return NULL;
object = (VGLBitmap *)malloc(sizeof(*object));
if (object == NULL)
return NULL;
object->Type = type;
object->Xsize = xsize;
object->Ysize = ysize;
object->VXsize = xsize;
object->VYsize = ysize;
object->Xorigin = 0;
object->Yorigin = 0;
object->Bitmap = bits;
return object;
}
void
VGLBitmapDestroy(VGLBitmap *object)
{
if (object->Bitmap)
free(object->Bitmap);
free(object);
}
int
VGLBitmapAllocateBits(VGLBitmap *object)
{
object->Bitmap = (byte *)malloc(object->VXsize*object->VYsize);
if (object->Bitmap == NULL)
return -1;
return 0;
}