First import of my little "video graphic library".

See the manpage vgl.3 for more info.

A little example will follow shortly.

1 files changed, 229 insertions, 0 deletions

diff --git a/lib/libvgl/bitmap.c b/lib/libvgl/bitmap.c
new file mode 100644
index 0000000..ffadb79
--- /dev/null
+++ b/lib/libvgl/bitmap.c
@@ -0,0 +1,229 @@
+/*-
+ * 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;
+}
+