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-rw-r--r--lib/libvgl/simple.c357
1 files changed, 357 insertions, 0 deletions
diff --git a/lib/libvgl/simple.c b/lib/libvgl/simple.c
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+/*-
+ * 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: simple.c,v 1.8 1997/08/15 12:32:59 sos Exp $
+ */
+
+#include <signal.h>
+#include <machine/console.h>
+#include "vgl.h"
+
+static byte VGLSavePaletteRed[256];
+static byte VGLSavePaletteGreen[256];
+static byte VGLSavePaletteBlue[256];
+
+#define ABS(a) (((a)<0) ? -(a) : (a))
+#define SGN(a) (((a)<0) ? -1 : 1)
+
+
+void
+VGLSetXY(VGLBitmap *object, int x, int y, byte color)
+{
+ VGLCheckSwitch();
+ if (x>=0 && x<object->Xsize && y>=0 && y<object->Ysize) {
+ if (!VGLMouseFreeze(x, y, 1, 1, color)) {
+ switch (object->Type) {
+ case MEMBUF:
+ case VIDBUF8:
+ object->Bitmap[y*object->Xsize+x]=(color);
+ break;
+ case VIDBUF8X:
+ outb(0x3c4, 0x02);
+ outb(0x3c5, 0x01 << (x&0x3));
+ object->Bitmap[(unsigned)(object->Xsize/2*y)+(x/4)] = (color);
+ break;
+ case VIDBUF4:
+ outb(0x3c4, 0x02); outb(0x3c5, 0x01);
+ outb(0x3ce, 0x04); outb(0x3cf, 0x00);
+ object->Bitmap[(y*object->Xsize/8+x/8)&0xffff] =
+ ( object->Bitmap[(y*object->Xsize/8+x/8)&0xffff] & ~(0x80>>(x%8)) )
+ | ((color & 0x01) ? (0x80>>(x%8)) : 0);
+ outb(0x3c4, 0x02); outb(0x3c5, 0x02);
+ outb(0x3ce, 0x04); outb(0x3cf, 0x01);
+ object->Bitmap[(y*object->Xsize/8+x/8)&0xffff] =
+ ( object->Bitmap[(y*object->Xsize/8+x/8)&0xffff] & ~(0x80>>(x%8)) )
+ | ((color & 0x02) ? (0x80>>(x%8)) : 0);
+ outb(0x3c4, 0x02); outb(0x3c5, 0x04);
+ outb(0x3ce, 0x04); outb(0x3cf, 0x02);
+ object->Bitmap[(y*object->Xsize/8+x/8)&0xffff] =
+ ( object->Bitmap[(y*object->Xsize/8+x/8)&0xffff] & ~(0x80>>(x%8)) )
+ | ((color & 0x04) ? (0x80>>(x%8)) : 0);
+ outb(0x3c4, 0x02); outb(0x3c5, 0x08);
+ outb(0x3ce, 0x04); outb(0x3cf, 0x03);
+ object->Bitmap[(y*object->Xsize/8+x/8)&0xffff] =
+ ( object->Bitmap[(y*object->Xsize/8+x/8)&0xffff] & ~(0x80>>(x%8)) )
+ | ((color & 0x08) ? (0x80>>(x%8)) : 0);
+ }
+ }
+ VGLMouseUnFreeze();
+ }
+}
+
+byte
+VGLGetXY(VGLBitmap *object, int x, int y)
+{
+ VGLCheckSwitch();
+ switch (object->Type) {
+ case MEMBUF:
+ case VIDBUF8:
+ return object->Bitmap[((y*object->Xsize)+x)];
+ break;
+ case VIDBUF8X:
+ outb(0x3ce, 0x04); outb(0x3cf, x & 0x3);
+ return object->Bitmap[(unsigned)(object->Xsize/4*y)+(x/4)];
+ break;
+ case VIDBUF4:
+ return (object->Bitmap[((y*object->Xsize/8)+x/8)]&(0x80>>(x%8))) ? 1 : 0;
+ break;
+ }
+ return 0;
+}
+
+void
+VGLLine(VGLBitmap *object, int x1, int y1, int x2, int y2, byte color)
+{
+ int d, x, y, ax, ay, sx, sy, dx, dy;
+
+ dx = x2-x1; ax = ABS(dx)<<1; sx = SGN(dx); x = x1;
+ dy = y2-y1; ay = ABS(dy)<<1; sy = SGN(dy); y = y1;
+
+ if (ax>ay) { /* x dominant */
+ d = ay-(ax>>1);
+ for (;;) {
+ VGLSetXY(object, x, y, color);
+ if (x==x2)
+ break;
+ if (d>=0) {
+ y += sy; d -= ax;
+ }
+ x += sx; d += ay;
+ }
+ }
+ else { /* y dominant */
+ d = ax-(ay>>1);
+ for (;;) {
+ VGLSetXY(object, x, y, color);
+ if (y==y2)
+ break;
+ if (d>=0) {
+ x += sx; d -= ay;
+ }
+ y += sy; d += ax;
+ }
+ }
+}
+
+void
+VGLBox(VGLBitmap *object, int x1, int y1, int x2, int y2, byte color)
+{
+ VGLLine(object, x1, y1, x2, y1, color);
+ VGLLine(object, x2, y1, x2, y2, color);
+ VGLLine(object, x2, y2, x1, y2, color);
+ VGLLine(object, x1, y2, x1, y1, color);
+}
+
+void
+VGLFilledBox(VGLBitmap *object, int x1, int y1, int x2, int y2, byte color)
+{
+ int y;
+
+ for (y=y1; y<=y2; y++) VGLLine(object, x1, y, x2, y, color);
+}
+
+void
+inline set4pixels(VGLBitmap *object, int x, int y, int xc, int yc, byte color)
+{
+ if (x!=0) {
+ VGLSetXY(object, xc+x, yc+y, color);
+ VGLSetXY(object, xc-x, yc+y, color);
+ if (y!=0) {
+ VGLSetXY(object, xc+x, yc-y, color);
+ VGLSetXY(object, xc-x, yc-y, color);
+ }
+ }
+ else {
+ VGLSetXY(object, xc, yc+y, color);
+ if (y!=0)
+ VGLSetXY(object, xc, yc-y, color);
+ }
+}
+
+void
+VGLEllipse(VGLBitmap *object, int xc, int yc, int a, int b, byte color)
+{
+ int x = 0, y = b, asq = a*a, asq2 = a*a*2, bsq = b*b;
+ int bsq2 = b*b*2, d = bsq-asq*b+asq/4, dx = 0, dy = asq2*b;
+
+ while (dx<dy) {
+ set4pixels(object, x, y, xc, yc, color);
+ if (d>0) {
+ y--; dy-=asq2; d-=dy;
+ }
+ x++; dx+=bsq2; d+=bsq+dx;
+ }
+ d+=(3*(asq-bsq)/2-(dx+dy))/2;
+ while (y>=0) {
+ set4pixels(object, x, y, xc, yc, color);
+ if (d<0) {
+ x++; dx+=bsq2; d+=dx;
+ }
+ y--; dy-=asq2; d+=asq-dy;
+ }
+}
+
+void
+inline set2lines(VGLBitmap *object, int x, int y, int xc, int yc, byte color)
+{
+ if (x!=0) {
+ VGLLine(object, xc+x, yc+y, xc-x, yc+y, color);
+ if (y!=0)
+ VGLLine(object, xc+x, yc-y, xc-x, yc-y, color);
+ }
+ else {
+ VGLLine(object, xc, yc+y, xc, yc-y, color);
+ }
+}
+
+void
+VGLFilledEllipse(VGLBitmap *object, int xc, int yc, int a, int b, byte color)
+{
+ int x = 0, y = b, asq = a*a, asq2 = a*a*2, bsq = b*b;
+ int bsq2 = b*b*2, d = bsq-asq*b+asq/4, dx = 0, dy = asq2*b;
+
+ while (dx<dy) {
+ set2lines(object, x, y, xc, yc, color);
+ if (d>0) {
+ y--; dy-=asq2; d-=dy;
+ }
+ x++; dx+=bsq2; d+=bsq+dx;
+ }
+ d+=(3*(asq-bsq)/2-(dx+dy))/2;
+ while (y>=0) {
+ set2lines(object, x, y, xc, yc, color);
+ if (d<0) {
+ x++; dx+=bsq2; d+=dx;
+ }
+ y--; dy-=asq2; d+=asq-dy;
+ }
+}
+
+void
+VGLClear(VGLBitmap *object, byte color)
+{
+ VGLCheckSwitch();
+ VGLMouseFreeze(0, 0, object->Xsize, object->Ysize, color);
+ switch (object->Type) {
+ case MEMBUF:
+ case VIDBUF8:
+ memset(object->Bitmap, color, object->Xsize*object->Ysize);
+ break;
+ case VIDBUF8X:
+ /* XXX works only for Xsize % 4 = 0 */
+ outb(0x3c4, 0x02); outb(0x3c5, 0x0f);
+ memset(object->Bitmap, color, object->Xsize*object->Ysize/4);
+ break;
+
+ case VIDBUF4:
+ /* XXX works only for Xsize % 8 = 0 */
+ memset(object->Bitmap, color, object->Xsize/8*object->Ysize);
+ break;
+ }
+ VGLMouseUnFreeze();
+}
+
+void
+VGLRestorePalette()
+{
+ int i;
+
+ outb(0x3C6, 0xFF);
+ inb(0x3DA);
+ outb(0x3C8, 0x00);
+ for (i=0; i<256; i++) {
+ outb(0x3C9, VGLSavePaletteRed[i]);
+ inb(0x84);
+ outb(0x3C9, VGLSavePaletteGreen[i]);
+ inb(0x84);
+ outb(0x3C9, VGLSavePaletteBlue[i]);
+ inb(0x84);
+ }
+ inb(0x3DA);
+ outb(0x3C0, 0x20);
+}
+
+void
+VGLSavePalette()
+{
+ int i;
+
+ outb(0x3C6, 0xFF);
+ inb(0x3DA);
+ outb(0x3C7, 0x00);
+ for (i=0; i<256; i++) {
+ VGLSavePaletteRed[i] = inb(0x3C9);
+ inb(0x84);
+ VGLSavePaletteGreen[i] = inb(0x3C9);
+ inb(0x84);
+ VGLSavePaletteBlue[i] = inb(0x3C9);
+ inb(0x84);
+ }
+ inb(0x3DA);
+ outb(0x3C0, 0x20);
+}
+
+void
+VGLSetPalette(byte *red, byte *green, byte *blue)
+{
+ int i;
+
+ for (i=0; i<256; i++) {
+ VGLSavePaletteRed[i] = red[i];
+ VGLSavePaletteGreen[i] = green[i];
+ VGLSavePaletteBlue[i] = blue[i];
+ }
+ VGLCheckSwitch();
+ outb(0x3C6, 0xFF);
+ inb(0x3DA);
+ outb(0x3C8, 0x00);
+ for (i=0; i<256; i++) {
+ outb(0x3C9, VGLSavePaletteRed[i]);
+ inb(0x84);
+ outb(0x3C9, VGLSavePaletteGreen[i]);
+ inb(0x84);
+ outb(0x3C9, VGLSavePaletteBlue[i]);
+ inb(0x84);
+ }
+ inb(0x3DA);
+ outb(0x3C0, 0x20);
+}
+
+void
+VGLSetPaletteIndex(byte color, byte red, byte green, byte blue)
+{
+ VGLSavePaletteRed[color] = red;
+ VGLSavePaletteGreen[color] = green;
+ VGLSavePaletteBlue[color] = blue;
+ VGLCheckSwitch();
+ outb(0x3C6, 0xFF);
+ inb(0x3DA);
+ outb(0x3C8, color);
+ outb(0x3C9, red); outb(0x3C9, green); outb(0x3C9, blue);
+ inb(0x3DA);
+ outb(0x3C0, 0x20);
+}
+
+void
+VGLSetBorder(byte color)
+{
+ VGLCheckSwitch();
+ inb(0x3DA);
+ outb(0x3C0,0x11); outb(0x3C0, color);
+ inb(0x3DA);
+ outb(0x3C0, 0x20);
+}
+
+void
+VGLBlankDisplay(int blank)
+{
+ byte val;
+
+ VGLCheckSwitch();
+ outb(0x3C4, 0x01); val = inb(0x3C5); outb(0x3C4, 0x01);
+ outb(0x3C5, ((blank) ? (val |= 0x20) : (val &= 0xDF)));
+}
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