File: id_vh.cpp

package info (click to toggle)
wolf4sdl 1.7+svn262+dfsg1-5
  • links: PTS, VCS
  • area: contrib
  • in suites: bullseye, buster, sid
  • size: 4,112 kB
  • sloc: cpp: 34,696; ansic: 1,257; objc: 246; makefile: 159; sh: 44
file content (470 lines) | stat: -rw-r--r-- 10,911 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
#include "wl_def.h"


pictabletype	*pictable;
SDL_Surface     *latchpics[NUMLATCHPICS];

int	    px,py;
byte	fontcolor,backcolor;
int	    fontnumber;

//==========================================================================

void VWB_DrawPropString(const char* string)
{
	fontstruct  *font;
	int		    width, step, height;
	byte	    *source, *dest;
	byte	    ch;
	int i;
	unsigned sx, sy;

	byte *vbuf = VL_LockSurface(curSurface);
	if(vbuf == NULL) return;

	font = (fontstruct *) grsegs[STARTFONT+fontnumber];
	height = font->height;
	dest = vbuf + scaleFactor * (py * curPitch + px);

	while ((ch = (byte)*string++)!=0)
	{
		width = step = font->width[ch];
		source = ((byte *)font)+font->location[ch];
		while (width--)
		{
			for(i=0; i<height; i++)
			{
				if(source[i*step])
				{
					for(sy=0; sy<scaleFactor; sy++)
						for(sx=0; sx<scaleFactor; sx++)
							dest[(scaleFactor*i+sy)*curPitch+sx]=fontcolor;
				}
			}

			source++;
			px++;
			dest+=scaleFactor;
		}
	}

	VL_UnlockSurface(curSurface);
}

/*
=================
=
= VL_MungePic
=
=================
*/

void VL_MungePic (byte *source, unsigned width, unsigned height)
{
	unsigned x,y,plane,size,pwidth;
	byte *temp, *dest, *srcline;

	size = width*height;

	if (width&3)
		Quit ("VL_MungePic: Not divisable by 4!");

//
// copy the pic to a temp buffer
//
	temp=(byte *) malloc(size);
    CHECKMALLOCRESULT(temp);
	memcpy (temp,source,size);

//
// munge it back into the original buffer
//
	dest = source;
	pwidth = width/4;

	for (plane=0;plane<4;plane++)
	{
		srcline = temp;
		for (y=0;y<height;y++)
		{
			for (x=0;x<pwidth;x++)
				*dest++ = *(srcline+x*4+plane);
			srcline+=width;
		}
	}

	free(temp);
}

void VWL_MeasureString (const char *string, word *width, word *height, fontstruct *font)
{
	*height = font->height;
	for (*width = 0;*string;string++)
		*width += font->width[*((byte *)string)];	// proportional width
}

void VW_MeasurePropString (const char *string, word *width, word *height)
{
	VWL_MeasureString(string,width,height,(fontstruct *)grsegs[STARTFONT+fontnumber]);
}

/*
=============================================================================

				Double buffer management routines

=============================================================================
*/

void VH_UpdateScreen()
{
	SDL_BlitSurface(screenBuffer, NULL, screen, NULL);
	SDL_Flip(screen);
}


void VWB_DrawTile8 (int x, int y, int tile)
{
	LatchDrawChar(x,y,tile);
}

void VWB_DrawTile8M (int x, int y, int tile)
{
	VL_MemToScreen (((byte *)grsegs[STARTTILE8M])+tile*64,8,8,x,y);
}

void VWB_DrawPic (int x, int y, int chunknum)
{
	int	picnum = chunknum - STARTPICS;
	unsigned width,height;

	x &= ~7;

	width = pictable[picnum].width;
	height = pictable[picnum].height;

	VL_MemToScreen (grsegs[chunknum],width,height,x,y);
}

void VWB_DrawPicScaledCoord (int scx, int scy, int chunknum)
{
	int	picnum = chunknum - STARTPICS;
	unsigned width,height;

	width = pictable[picnum].width;
	height = pictable[picnum].height;

    VL_MemToScreenScaledCoord (grsegs[chunknum],width,height,scx,scy);
}


void VWB_Bar (int x, int y, int width, int height, int color)
{
	VW_Bar (x,y,width,height,color);
}

void VWB_Plot (int x, int y, int color)
{
    if(scaleFactor == 1)
        VW_Plot(x,y,color);
    else
        VW_Bar(x, y, 1, 1, color);
}

void VWB_Hlin (int x1, int x2, int y, int color)
{
    if(scaleFactor == 1)
    	VW_Hlin(x1,x2,y,color);
    else
        VW_Bar(x1, y, x2-x1+1, 1, color);
}

void VWB_Vlin (int y1, int y2, int x, int color)
{
    if(scaleFactor == 1)
		VW_Vlin(y1,y2,x,color);
    else
        VW_Bar(x, y1, 1, y2-y1+1, color);
}


/*
=============================================================================

						WOLFENSTEIN STUFF

=============================================================================
*/

/*
=====================
=
= LatchDrawPic
=
=====================
*/

void LatchDrawPic (unsigned x, unsigned y, unsigned picnum)
{
	VL_LatchToScreen (latchpics[2+picnum-LATCHPICS_LUMP_START], x*8, y);
}

void LatchDrawPicScaledCoord (unsigned scx, unsigned scy, unsigned picnum)
{
	VL_LatchToScreenScaledCoord (latchpics[2+picnum-LATCHPICS_LUMP_START], scx*8, scy);
}


//==========================================================================

void FreeLatchMem()
{
    int i;
    for(i = 0; i < 2 + LATCHPICS_LUMP_END - LATCHPICS_LUMP_START; i++)
    {
        SDL_FreeSurface(latchpics[i]);
        latchpics[i] = NULL;
    }
}

/*
===================
=
= LoadLatchMem
=
===================
*/

void LoadLatchMem (void)
{
	int	i,width,height,start,end;
	byte *src;
	SDL_Surface *surf;

//
// tile 8s
//
    surf = SDL_CreateRGBSurface(SDL_HWSURFACE, 8*8,
        ((NUMTILE8 + 7) / 8) * 8, 8, 0, 0, 0, 0);
    if(surf == NULL)
    {
        Quit("Unable to create surface for tiles!");
    }
    SDL_SetColors(surf, gamepal, 0, 256);

	latchpics[0] = surf;
	CA_CacheGrChunk (STARTTILE8);
	src = grsegs[STARTTILE8];

	for (i=0;i<NUMTILE8;i++)
	{
		VL_MemToLatch (src, 8, 8, surf, (i & 7) * 8, (i >> 3) * 8);
		src += 64;
	}
	UNCACHEGRCHUNK (STARTTILE8);

	latchpics[1] = NULL;  // not used

//
// pics
//
	start = LATCHPICS_LUMP_START;
	end = LATCHPICS_LUMP_END;

	for (i=start;i<=end;i++)
	{
		width = pictable[i-STARTPICS].width;
		height = pictable[i-STARTPICS].height;
		surf = SDL_CreateRGBSurface(SDL_HWSURFACE, width, height, 8, 0, 0, 0, 0);
        if(surf == NULL)
        {
            Quit("Unable to create surface for picture!");
        }
        SDL_SetColors(surf, gamepal, 0, 256);

		latchpics[2+i-start] = surf;
		CA_CacheGrChunk (i);
		VL_MemToLatch (grsegs[i], width, height, surf, 0, 0);
		UNCACHEGRCHUNK(i);
	}
}

//==========================================================================

/*
===================
=
= FizzleFade
=
= returns true if aborted
=
= It uses maximum-length Linear Feedback Shift Registers (LFSR) counters.
= You can find a list of them with lengths from 3 to 168 at:
= http://www.xilinx.com/support/documentation/application_notes/xapp052.pdf
= Many thanks to Xilinx for this list!!!
=
===================
*/

// XOR masks for the pseudo-random number sequence starting with n=17 bits
static const uint32_t rndmasks[] = {
                    // n    XNOR from (starting at 1, not 0 as usual)
    0x00012000,     // 17   17,14
    0x00020400,     // 18   18,11
    0x00040023,     // 19   19,6,2,1
    0x00090000,     // 20   20,17
    0x00140000,     // 21   21,19
    0x00300000,     // 22   22,21
    0x00420000,     // 23   23,18
    0x00e10000,     // 24   24,23,22,17
    0x01200000,     // 25   25,22      (this is enough for 8191x4095)
};

static unsigned int rndbits_y;
static unsigned int rndmask;

extern SDL_Color curpal[256];

// Returns the number of bits needed to represent the given value
static int log2_ceil(uint32_t x)
{
    int n = 0;
    uint32_t v = 1;
    while(v < x)
    {
        n++;
        v <<= 1;
    }
    return n;
}

void VH_Startup()
{
    int rndbits_x = log2_ceil(screenWidth);
    rndbits_y = log2_ceil(screenHeight);

    int rndbits = rndbits_x + rndbits_y;
    if(rndbits < 17)
        rndbits = 17;       // no problem, just a bit slower
    else if(rndbits > 25)
        rndbits = 25;       // fizzle fade will not fill whole screen

    rndmask = rndmasks[rndbits - 17];
}

boolean FizzleFade (SDL_Surface *source, int x1, int y1,
    unsigned width, unsigned height, unsigned frames, boolean abortable)
{
    unsigned x, y, frame, pixperframe;
    int32_t  rndval = 0, lastrndval;
    int      first = 1;

    lastrndval = 0;
    pixperframe = width * height / frames;

    IN_StartAck ();

    frame = GetTimeCount();
    byte *srcptr = VL_LockSurface(source);
    if(srcptr == NULL) return false;

    do
    {
        IN_ProcessEvents();

        if(abortable && IN_CheckAck ())
        {
            VL_UnlockSurface(source);
            SDL_BlitSurface(source, NULL, screen, NULL);
            SDL_Flip(screen);
            return true;
        }

        byte *destptr = VL_LockSurface(screen);

        if(destptr != NULL)
        {
            rndval = lastrndval;

            // When using double buffering, we have to copy the pixels of the last AND the current frame.
            // Only for the first frame, there is no "last frame"
            for(int i = first; i < 2; i++)
            {
                for(unsigned p = 0; p < pixperframe; p++)
                {
                    //
                    // seperate random value into x/y pair
                    //

                    x = rndval >> rndbits_y;
                    y = rndval & ((1 << rndbits_y) - 1);

                    //
                    // advance to next random element
                    //

                    rndval = (rndval >> 1) ^ (rndval & 1 ? 0 : rndmask);

                    if(x >= width || y >= height)
                    {
                        if(rndval == 0)     // entire sequence has been completed
                            goto finished;
                        p--;
                        continue;
                    }

                    //
                    // copy one pixel
                    //

                    if(screenBits == 8)
                    {
                        *(destptr + (y1 + y) * screen->pitch + x1 + x)
                            = *(srcptr + (y1 + y) * source->pitch + x1 + x);
                    }
                    else
                    {
                        byte col = *(srcptr + (y1 + y) * source->pitch + x1 + x);
                        uint32_t fullcol = SDL_MapRGB(screen->format, curpal[col].r, curpal[col].g, curpal[col].b);
                        memcpy(destptr + (y1 + y) * screen->pitch + (x1 + x) * screen->format->BytesPerPixel,
                            &fullcol, screen->format->BytesPerPixel);
                    }

                    if(rndval == 0)		// entire sequence has been completed
                        goto finished;
                }

                if(!i || first) lastrndval = rndval;
            }

            // If there is no double buffering, we always use the "first frame" case
            if(usedoublebuffering) first = 0;

            VL_UnlockSurface(screen);
            SDL_Flip(screen);
        }
        else
        {
            // No surface, so only enhance rndval
            for(int i = first; i < 2; i++)
            {
                for(unsigned p = 0; p < pixperframe; p++)
                {
                    rndval = (rndval >> 1) ^ (rndval & 1 ? 0 : rndmask);
                    if(rndval == 0)
                        goto finished;
                }
            }
        }

        frame++;
        Delay(frame - GetTimeCount());        // don't go too fast
    } while (1);

finished:
    VL_UnlockSurface(source);
    VL_UnlockSurface(screen);
    SDL_BlitSurface(source, NULL, screen, NULL);
    SDL_Flip(screen);
    return false;
}