1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1991-1997 Søren Schmidt
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer,
12 * in this position and unchanged.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include <sys/types.h>
32 #include <signal.h>
33 #include <sys/fbio.h>
34 #include "vgl.h"
35
36 #define min(x, y) (((x) < (y)) ? (x) : (y))
37
38 static byte mask[8] = {0xff, 0x7f, 0x3f, 0x1f, 0x0f, 0x07, 0x03, 0x01};
39 static int color2bit[16] = {0x00000000, 0x00000001, 0x00000100, 0x00000101,
40 0x00010000, 0x00010001, 0x00010100, 0x00010101,
41 0x01000000, 0x01000001, 0x01000100, 0x01000101,
42 0x01010000, 0x01010001, 0x01010100, 0x01010101};
43
44 static void
WriteVerticalLine(VGLBitmap * dst,int x,int y,int width,byte * line)45 WriteVerticalLine(VGLBitmap *dst, int x, int y, int width, byte *line)
46 {
47 int bwidth, i, pos, last, planepos, start_offset, end_offset, offset;
48 int len;
49 unsigned int word = 0;
50 byte *address;
51 byte *VGLPlane[4];
52
53 switch (dst->Type) {
54 case VIDBUF4:
55 case VIDBUF4S:
56 start_offset = (x & 0x07);
57 end_offset = (x + width) & 0x07;
58 bwidth = (width + start_offset) / 8;
59 if (end_offset)
60 bwidth++;
61 VGLPlane[0] = VGLBuf;
62 VGLPlane[1] = VGLPlane[0] + bwidth;
63 VGLPlane[2] = VGLPlane[1] + bwidth;
64 VGLPlane[3] = VGLPlane[2] + bwidth;
65 pos = 0;
66 planepos = 0;
67 last = 8 - start_offset;
68 while (pos < width) {
69 word = 0;
70 while (pos < last && pos < width)
71 word = (word<<1) | color2bit[line[pos++]&0x0f];
72 VGLPlane[0][planepos] = word;
73 VGLPlane[1][planepos] = word>>8;
74 VGLPlane[2][planepos] = word>>16;
75 VGLPlane[3][planepos] = word>>24;
76 planepos++;
77 last += 8;
78 }
79 planepos--;
80 if (end_offset) {
81 word <<= (8 - end_offset);
82 VGLPlane[0][planepos] = word;
83 VGLPlane[1][planepos] = word>>8;
84 VGLPlane[2][planepos] = word>>16;
85 VGLPlane[3][planepos] = word>>24;
86 }
87 outb(0x3ce, 0x01); outb(0x3cf, 0x00); /* set/reset enable */
88 outb(0x3ce, 0x08); outb(0x3cf, 0xff); /* bit mask */
89 for (i=0; i<4; i++) {
90 outb(0x3c4, 0x02);
91 outb(0x3c5, 0x01<<i);
92 outb(0x3ce, 0x04);
93 outb(0x3cf, i);
94 pos = VGLAdpInfo.va_line_width*y + x/8;
95 if (dst->Type == VIDBUF4) {
96 if (end_offset)
97 VGLPlane[i][planepos] |= dst->Bitmap[pos+planepos] & mask[end_offset];
98 if (start_offset)
99 VGLPlane[i][0] |= dst->Bitmap[pos] & ~mask[start_offset];
100 bcopy(&VGLPlane[i][0], dst->Bitmap + pos, bwidth);
101 } else { /* VIDBUF4S */
102 if (end_offset) {
103 offset = VGLSetSegment(pos + planepos);
104 VGLPlane[i][planepos] |= dst->Bitmap[offset] & mask[end_offset];
105 }
106 offset = VGLSetSegment(pos);
107 if (start_offset)
108 VGLPlane[i][0] |= dst->Bitmap[offset] & ~mask[start_offset];
109 for (last = bwidth; ; ) {
110 len = min(VGLAdpInfo.va_window_size - offset, last);
111 bcopy(&VGLPlane[i][bwidth - last], dst->Bitmap + offset, len);
112 pos += len;
113 last -= len;
114 if (last <= 0)
115 break;
116 offset = VGLSetSegment(pos);
117 }
118 }
119 }
120 break;
121 case VIDBUF8X:
122 address = dst->Bitmap + VGLAdpInfo.va_line_width * y + x/4;
123 for (i=0; i<4; i++) {
124 outb(0x3c4, 0x02);
125 outb(0x3c5, 0x01 << ((x + i)%4));
126 for (planepos=0, pos=i; pos<width; planepos++, pos+=4)
127 address[planepos] = line[pos];
128 if ((x + i)%4 == 3)
129 ++address;
130 }
131 break;
132 case VIDBUF8S:
133 case VIDBUF16S:
134 case VIDBUF24S:
135 case VIDBUF32S:
136 width = width * dst->PixelBytes;
137 pos = (dst->VXsize * y + x) * dst->PixelBytes;
138 while (width > 0) {
139 offset = VGLSetSegment(pos);
140 i = min(VGLAdpInfo.va_window_size - offset, width);
141 bcopy(line, dst->Bitmap + offset, i);
142 line += i;
143 pos += i;
144 width -= i;
145 }
146 break;
147 case MEMBUF:
148 case VIDBUF8:
149 case VIDBUF16:
150 case VIDBUF24:
151 case VIDBUF32:
152 address = dst->Bitmap + (dst->VXsize * y + x) * dst->PixelBytes;
153 bcopy(line, address, width * dst->PixelBytes);
154 break;
155 default:
156 ;
157 }
158 }
159
160 int
__VGLBitmapCopy(VGLBitmap * src,int srcx,int srcy,VGLBitmap * dst,int dstx,int dsty,int width,int hight)161 __VGLBitmapCopy(VGLBitmap *src, int srcx, int srcy,
162 VGLBitmap *dst, int dstx, int dsty, int width, int hight)
163 {
164 byte *buffer, *p;
165 int mousemerge, srcline, dstline, yend, yextra, ystep;
166
167 mousemerge = 0;
168 if (hight < 0) {
169 hight = -hight;
170 mousemerge = (dst == VGLDisplay &&
171 VGLMouseOverlap(dstx, dsty, width, hight));
172 if (mousemerge)
173 buffer = alloca(width*src->PixelBytes);
174 }
175 if (srcx>src->VXsize || srcy>src->VYsize
176 || dstx>dst->VXsize || dsty>dst->VYsize)
177 return -1;
178 if (srcx < 0) {
179 width=width+srcx; dstx-=srcx; srcx=0;
180 }
181 if (srcy < 0) {
182 hight=hight+srcy; dsty-=srcy; srcy=0;
183 }
184 if (dstx < 0) {
185 width=width+dstx; srcx-=dstx; dstx=0;
186 }
187 if (dsty < 0) {
188 hight=hight+dsty; srcy-=dsty; dsty=0;
189 }
190 if (srcx+width > src->VXsize)
191 width=src->VXsize-srcx;
192 if (srcy+hight > src->VYsize)
193 hight=src->VYsize-srcy;
194 if (dstx+width > dst->VXsize)
195 width=dst->VXsize-dstx;
196 if (dsty+hight > dst->VYsize)
197 hight=dst->VYsize-dsty;
198 if (width < 0 || hight < 0)
199 return -1;
200 yend = srcy + hight;
201 yextra = 0;
202 ystep = 1;
203 if (src->Bitmap == dst->Bitmap && srcy < dsty) {
204 yend = srcy - 1;
205 yextra = hight - 1;
206 ystep = -1;
207 }
208 for (srcline = srcy + yextra, dstline = dsty + yextra; srcline != yend;
209 srcline += ystep, dstline += ystep) {
210 p = src->Bitmap+(srcline*src->VXsize+srcx)*dst->PixelBytes;
211 if (mousemerge && VGLMouseOverlap(dstx, dstline, width, 1)) {
212 bcopy(p, buffer, width*src->PixelBytes);
213 p = buffer;
214 VGLMouseMerge(dstx, dstline, width, p);
215 }
216 WriteVerticalLine(dst, dstx, dstline, width, p);
217 }
218 return 0;
219 }
220
221 int
VGLBitmapCopy(VGLBitmap * src,int srcx,int srcy,VGLBitmap * dst,int dstx,int dsty,int width,int hight)222 VGLBitmapCopy(VGLBitmap *src, int srcx, int srcy,
223 VGLBitmap *dst, int dstx, int dsty, int width, int hight)
224 {
225 int error;
226
227 if (hight < 0)
228 return -1;
229 if (src == VGLDisplay)
230 src = &VGLVDisplay;
231 if (src->Type != MEMBUF)
232 return -1; /* invalid */
233 if (dst == VGLDisplay) {
234 VGLMouseFreeze();
235 __VGLBitmapCopy(src, srcx, srcy, &VGLVDisplay, dstx, dsty, width, hight);
236 error = __VGLBitmapCopy(src, srcx, srcy, &VGLVDisplay, dstx, dsty,
237 width, hight);
238 if (error != 0)
239 return error;
240 src = &VGLVDisplay;
241 srcx = dstx;
242 srcy = dsty;
243 } else if (dst->Type != MEMBUF)
244 return -1; /* invalid */
245 error = __VGLBitmapCopy(src, srcx, srcy, dst, dstx, dsty, width, -hight);
246 if (dst == VGLDisplay)
247 VGLMouseUnFreeze();
248 return error;
249 }
250
251 VGLBitmap
VGLBitmapCreate(int type,int xsize,int ysize,byte * bits)252 *VGLBitmapCreate(int type, int xsize, int ysize, byte *bits)
253 {
254 VGLBitmap *object;
255
256 if (type != MEMBUF)
257 return NULL;
258 if (xsize < 0 || ysize < 0)
259 return NULL;
260 object = (VGLBitmap *)malloc(sizeof(*object));
261 if (object == NULL)
262 return NULL;
263 object->Type = type;
264 object->Xsize = xsize;
265 object->Ysize = ysize;
266 object->VXsize = xsize;
267 object->VYsize = ysize;
268 object->Xorigin = 0;
269 object->Yorigin = 0;
270 object->Bitmap = bits;
271 object->PixelBytes = VGLDisplay->PixelBytes;
272 return object;
273 }
274
275 void
VGLBitmapDestroy(VGLBitmap * object)276 VGLBitmapDestroy(VGLBitmap *object)
277 {
278 if (object->Bitmap)
279 free(object->Bitmap);
280 free(object);
281 }
282
283 int
VGLBitmapAllocateBits(VGLBitmap * object)284 VGLBitmapAllocateBits(VGLBitmap *object)
285 {
286 object->Bitmap = malloc(object->VXsize*object->VYsize*object->PixelBytes);
287 if (object->Bitmap == NULL)
288 return -1;
289 return 0;
290 }
291
292 void
VGLBitmapCvt(VGLBitmap * src,VGLBitmap * dst)293 VGLBitmapCvt(VGLBitmap *src, VGLBitmap *dst)
294 {
295 u_long color;
296 int dstpos, i, pb, size, srcpb, srcpos;
297
298 size = src->VXsize * src->VYsize;
299 srcpb = src->PixelBytes;
300 if (srcpb <= 0)
301 srcpb = 1;
302 pb = dst->PixelBytes;
303 if (pb == srcpb) {
304 bcopy(src->Bitmap, dst->Bitmap, size * pb);
305 return;
306 }
307 if (srcpb != 1)
308 return; /* not supported */
309 for (srcpos = dstpos = 0; srcpos < size; srcpos++) {
310 color = VGLrgb332ToNative(src->Bitmap[srcpos]);
311 for (i = 0; i < pb; i++, color >>= 8)
312 dst->Bitmap[dstpos++] = color;
313 }
314 }
315