c7432537b1
VGLMouseFreeze() now only defers mouse signals and leaves it to higher levels to hide and unhide the mouse cursor if necessary. (It is never necessary, but is done to simplify the implementation. It is slow and flashes the cursor. It is still done for copying bitmaps and clearing.) VGLMouseUnFreeze() now only undoes 1 level of freezing. Its old optimization to reduce mouse redrawing is too hard to do with unhiding in higher levels, and its undoing of multiple levels was a historical mistake. VGLMouseOverlap() determines if a region overlaps the (full) mouse region. VGLMouseFreezeXY() is the freezing and a precise overlap check combined for the special case of writing a single pixel. This is the single-pixel case of the old VGLMouseFreeze() with cleanups. Fixes: - check in more cases that the application didn't pass an invalid VIDBUF - check for errors from copying a bitmap to the shadow buffer - freeze the mouse before writing to the shadow buffer in all cases. This was not done for the case of writing a single pixel (there was a race) - don't spell the #defined values for VGLMouseShown as 0, 1 or boolean.
314 lines
8.7 KiB
C
314 lines
8.7 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 <sys/types.h>
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#include <signal.h>
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#include <sys/fbio.h>
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#include "vgl.h"
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#define min(x, y) (((x) < (y)) ? (x) : (y))
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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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int len;
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unsigned int word = 0;
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byte *address;
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byte *VGLPlane[4];
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switch (dst->Type) {
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case VIDBUF4:
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case VIDBUF4S:
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start_offset = (x & 0x07);
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end_offset = (x + width) & 0x07;
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i = (width + start_offset) / 8;
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if (end_offset)
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i++;
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VGLPlane[0] = VGLBuf;
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VGLPlane[1] = VGLPlane[0] + i;
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VGLPlane[2] = VGLPlane[1] + i;
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VGLPlane[3] = VGLPlane[2] + i;
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pos = 0;
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planepos = 0;
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last = 8 - start_offset;
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while (pos < width) {
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word = 0;
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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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last += 8;
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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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width /= 8;
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outb(0x3ce, 0x01); outb(0x3cf, 0x00); /* set/reset enable */
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outb(0x3ce, 0x08); outb(0x3cf, 0xff); /* bit mask */
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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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pos = VGLAdpInfo.va_line_width*y + x/8;
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if (dst->Type == VIDBUF4) {
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if (end_offset)
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VGLPlane[i][planepos] |= dst->Bitmap[pos+planepos] & mask[end_offset];
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if (start_offset)
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VGLPlane[i][0] |= dst->Bitmap[pos] & ~mask[start_offset];
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bcopy(&VGLPlane[i][0], dst->Bitmap + pos, width);
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} else { /* VIDBUF4S */
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if (end_offset) {
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offset = VGLSetSegment(pos + planepos);
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VGLPlane[i][planepos] |= dst->Bitmap[offset] & mask[end_offset];
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}
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offset = VGLSetSegment(pos);
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if (start_offset)
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VGLPlane[i][0] |= dst->Bitmap[offset] & ~mask[start_offset];
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for (last = width; ; ) {
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len = min(VGLAdpInfo.va_window_size - offset, last);
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bcopy(&VGLPlane[i][width - last], dst->Bitmap + offset, len);
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pos += len;
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last -= len;
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if (last <= 0)
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break;
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offset = VGLSetSegment(pos);
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}
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}
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}
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break;
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case VIDBUF8X:
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address = dst->Bitmap + VGLAdpInfo.va_line_width * y + x/4;
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for (i=0; i<4; i++) {
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outb(0x3c4, 0x02);
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outb(0x3c5, 0x01 << ((x + i)%4));
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for (planepos=0, pos=i; pos<width; planepos++, pos+=4)
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address[planepos] = line[pos];
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if ((x + i)%4 == 3)
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++address;
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}
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break;
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case VIDBUF8S:
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case VIDBUF16S:
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case VIDBUF24S:
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case VIDBUF32S:
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width = width * dst->PixelBytes;
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pos = (dst->VXsize * y + x) * dst->PixelBytes;
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while (width > 0) {
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offset = VGLSetSegment(pos);
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i = min(VGLAdpInfo.va_window_size - offset, width);
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bcopy(line, dst->Bitmap + offset, i);
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line += i;
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pos += i;
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width -= i;
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}
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break;
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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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address = dst->Bitmap + (dst->VXsize * y + x) * dst->PixelBytes;
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bcopy(line, address, width * dst->PixelBytes);
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break;
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default:
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;
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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, yend, yextra, ystep;
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if (srcx>src->VXsize || srcy>src->VYsize
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|| dstx>dst->VXsize || dsty>dst->VYsize)
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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->VXsize)
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width=src->VXsize-srcx;
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if (srcy+hight > src->VYsize)
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hight=src->VYsize-srcy;
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if (dstx+width > dst->VXsize)
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width=dst->VXsize-dstx;
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if (dsty+hight > dst->VYsize)
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hight=dst->VYsize-dsty;
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if (width < 0 || hight < 0)
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return -1;
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yend = srcy + hight;
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yextra = 0;
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ystep = 1;
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if (src->Bitmap == dst->Bitmap && srcy < dsty) {
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yend = srcy;
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yextra = hight - 1;
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ystep = -1;
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}
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for (srcline = srcy + yextra, dstline = dsty + yextra; srcline != yend;
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srcline += ystep, dstline += ystep) {
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WriteVerticalLine(dst, dstx, dstline, width,
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src->Bitmap+(srcline*src->VXsize+srcx)*dst->PixelBytes);
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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, mouseoverlap;
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if (src == VGLDisplay)
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src = &VGLVDisplay;
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if (src->Type != MEMBUF)
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return -1; /* invalid */
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if (dst == VGLDisplay) {
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VGLMouseFreeze();
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mouseoverlap = VGLMouseOverlap(dstx, dsty, width, hight);
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if (mouseoverlap)
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VGLMousePointerHide();
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error = __VGLBitmapCopy(src, srcx, srcy, &VGLVDisplay, dstx, dsty,
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width, hight);
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if (error != 0) {
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if (mouseoverlap)
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VGLMousePointerShow();
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VGLMouseUnFreeze();
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return error;
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}
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src = &VGLVDisplay;
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srcx = dstx;
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srcy = dsty;
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} else if (dst->Type != MEMBUF)
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return -1; /* invalid */
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error = __VGLBitmapCopy(src, srcx, srcy, dst, dstx, dsty, width, hight);
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if (dst == VGLDisplay) {
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if (mouseoverlap)
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VGLMousePointerShow();
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VGLMouseUnFreeze();
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}
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return error;
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}
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VGLBitmap
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*VGLBitmapCreate(int type, int xsize, int ysize, byte *bits)
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{
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VGLBitmap *object;
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if (type != MEMBUF)
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return NULL;
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if (xsize < 0 || ysize < 0)
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return NULL;
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object = (VGLBitmap *)malloc(sizeof(*object));
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if (object == NULL)
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return NULL;
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object->Type = type;
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object->Xsize = xsize;
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object->Ysize = ysize;
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object->VXsize = xsize;
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object->VYsize = ysize;
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object->Xorigin = 0;
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object->Yorigin = 0;
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object->Bitmap = bits;
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object->PixelBytes = VGLDisplay->PixelBytes;
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return object;
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}
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void
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VGLBitmapDestroy(VGLBitmap *object)
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{
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if (object->Bitmap)
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free(object->Bitmap);
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free(object);
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}
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int
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VGLBitmapAllocateBits(VGLBitmap *object)
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{
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object->Bitmap = malloc(object->VXsize*object->VYsize*object->PixelBytes);
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if (object->Bitmap == NULL)
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return -1;
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return 0;
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}
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void
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VGLBitmapCvt(VGLBitmap *src, VGLBitmap *dst)
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{
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u_long color;
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int dstpos, i, pb, size, srcpb, srcpos;
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size = src->VXsize * src->VYsize;
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srcpb = src->PixelBytes;
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if (srcpb <= 0)
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srcpb = 1;
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pb = dst->PixelBytes;
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if (pb == srcpb) {
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bcopy(src->Bitmap, dst->Bitmap, size * pb);
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return;
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}
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if (srcpb != 1)
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return; /* not supported */
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for (srcpos = dstpos = 0; srcpos < size; srcpos++) {
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color = VGLrgb332ToNative(src->Bitmap[srcpos]);
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for (i = 0; i < pb; i++, color >>= 8)
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dst->Bitmap[dstpos++] = color;
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}
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}
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