summaryrefslogtreecommitdiff
path: root/src/mesa/drivers/windows/gdi/wgl.c
blob: 920929c42e344448220e1f726343ea1d060ed57a (plain)
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
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
/* $Id: wgl.c,v 1.6 2004/08/30 08:37:57 dborca Exp $ */

/*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/

/*
* File name 	: wgl.c
* WGL stuff. Added by Oleg Letsinsky, ajl@ultersys.ru
* Some things originated from the 3Dfx WGL functions
*/

#ifdef WIN32

#ifdef __cplusplus
extern "C" {
#endif

#include <windows.h>
#define GL_GLEXT_PROTOTYPES
#include <GL/gl.h>
#include <GL/glext.h>
//#include <GL/glu.h>

#ifdef __cplusplus
}
#endif

#include <stdio.h>
#include <tchar.h>
#include "wmesadef.h"
#include "GL/wmesa.h"
#include "mtypes.h"
#include "glapi.h"

#define MAX_MESA_ATTRS	20

struct __pixelformat__
{
    PIXELFORMATDESCRIPTOR	pfd;
    GLboolean doubleBuffered;
};

struct __pixelformat__	pix[] =
{
    /* Double Buffer, alpha */
    {	{	sizeof(PIXELFORMATDESCRIPTOR),	1,
        PFD_DRAW_TO_WINDOW|PFD_SUPPORT_OPENGL|PFD_GENERIC_FORMAT|PFD_DOUBLEBUFFER|PFD_SWAP_COPY,
        PFD_TYPE_RGBA,
        24,	8,	0,	8,	8,	8,	16,	8,	24,
        0,	0,	0,	0,	0,	16,	8,	0,	0,	0,	0,	0,	0 },
        GL_TRUE
    },
    /* Single Buffer, alpha */
    {	{	sizeof(PIXELFORMATDESCRIPTOR),	1,
        PFD_DRAW_TO_WINDOW|PFD_SUPPORT_OPENGL|PFD_GENERIC_FORMAT,
        PFD_TYPE_RGBA,
        24,	8,	0,	8,	8,	8,	16,	8,	24,
        0,	0,	0,	0,	0,	16,	8,	0,	0,	0,	0,	0,	0 },
        GL_FALSE
    },
    /* Double Buffer, no alpha */
    {	{	sizeof(PIXELFORMATDESCRIPTOR),	1,
        PFD_DRAW_TO_WINDOW|PFD_SUPPORT_OPENGL|PFD_GENERIC_FORMAT|PFD_DOUBLEBUFFER|PFD_SWAP_COPY,
        PFD_TYPE_RGBA,
        24,	8,	0,	8,	8,	8,	16,	0,	0,
        0,	0,	0,	0,	0,	16,	8,	0,	0,	0,	0,	0,	0 },
        GL_TRUE
    },
    /* Single Buffer, no alpha */
    {	{	sizeof(PIXELFORMATDESCRIPTOR),	1,
        PFD_DRAW_TO_WINDOW|PFD_SUPPORT_OPENGL|PFD_GENERIC_FORMAT,
        PFD_TYPE_RGBA,
        24,	8,	0,	8,	8,	8,	16,	0,	0,
        0,	0,	0,	0,	0,	16,	8,	0,	0,	0,	0,	0,	0 },
        GL_FALSE
    },
};

int qt_pix = sizeof(pix) / sizeof(pix[0]);

typedef struct {
    WMesaContext ctx;
    HDC hdc;
} MesaWglCtx;

#define MESAWGL_CTX_MAX_COUNT 20

static MesaWglCtx wgl_ctx[MESAWGL_CTX_MAX_COUNT];

static unsigned ctx_count = 0;
static int ctx_current = -1;
static unsigned curPFD = 0;

WGLAPI BOOL GLAPIENTRY wglCopyContext(HGLRC hglrcSrc,HGLRC hglrcDst,UINT mask)
{
    (void) hglrcSrc; (void) hglrcDst; (void) mask;
    return(FALSE);
}

WGLAPI HGLRC GLAPIENTRY wglCreateContext(HDC hdc)
{
    HWND		hWnd;
    int i = 0;
    if(!(hWnd = WindowFromDC(hdc)))
    {
        SetLastError(0);
        return(NULL);
    }
    if (!ctx_count)
    {
    	for(i=0;i<MESAWGL_CTX_MAX_COUNT;i++)
    	{
    		wgl_ctx[i].ctx = NULL;
    		wgl_ctx[i].hdc = NULL;
    	}
    }
    for( i = 0; i < MESAWGL_CTX_MAX_COUNT; i++ )
    {
        if ( wgl_ctx[i].ctx == NULL )
        {
            wgl_ctx[i].ctx = WMesaCreateContext( hWnd, NULL, GL_TRUE,
                pix[curPFD-1].doubleBuffered, 
                pix[curPFD-1].pfd.cAlphaBits ? GL_TRUE : GL_FALSE);
            if (wgl_ctx[i].ctx == NULL)
                break;
            wgl_ctx[i].hdc = hdc;
            ctx_count++;
            return ((HGLRC)wgl_ctx[i].ctx);
        }
    }
    SetLastError(0);
    return(NULL);
}

WGLAPI BOOL GLAPIENTRY wglDeleteContext(HGLRC hglrc)
{
    int i;
    for ( i = 0; i < MESAWGL_CTX_MAX_COUNT; i++ )
    {
    	if ( wgl_ctx[i].ctx == (PWMC) hglrc )
    	{
            WMesaMakeCurrent((PWMC) hglrc);
            WMesaDestroyContext();
            wgl_ctx[i].ctx = NULL;
            wgl_ctx[i].hdc = NULL;
            ctx_count--;
            return(TRUE);
    	}
    }
    SetLastError(0);
    return(FALSE);
}

WGLAPI HGLRC GLAPIENTRY wglCreateLayerContext(HDC hdc,int iLayerPlane)
{
    (void) hdc; (void) iLayerPlane;
    SetLastError(0);
    return(NULL);
}

WGLAPI HGLRC GLAPIENTRY wglGetCurrentContext(VOID)
{
   if (ctx_current < 0)
      return 0;
   else
      return (HGLRC) wgl_ctx[ctx_current].ctx;
}

WGLAPI HDC GLAPIENTRY wglGetCurrentDC(VOID)
{
   if (ctx_current < 0)
      return 0;
   else
      return wgl_ctx[ctx_current].hdc;
}

WGLAPI BOOL GLAPIENTRY wglMakeCurrent(HDC hdc,HGLRC hglrc)
{
    int i;

    /* new code suggested by Andy Sy */
    if (!hdc || !hglrc) {
       WMesaMakeCurrent(NULL);
       ctx_current = -1;
       return TRUE;
    }

    for ( i = 0; i < MESAWGL_CTX_MAX_COUNT; i++ )
    {
        if ( wgl_ctx[i].ctx == (PWMC) hglrc )
        {
            wgl_ctx[i].hdc = hdc;
            WMesaMakeCurrent( (WMesaContext) hglrc );
            ctx_current = i;
            return TRUE;
        }
    }
    return FALSE;
}

WGLAPI BOOL GLAPIENTRY wglShareLists(HGLRC hglrc1,HGLRC hglrc2)
{
    (void) hglrc1; (void) hglrc2;
    return(TRUE);
}


static FIXED FixedFromDouble(double d)
{
   long l = (long) (d * 65536L);
   return *(FIXED *) (void *) &l;
}


/*
** This is cribbed from FX/fxwgl.c, and seems to implement support
** for bitmap fonts where the wglUseFontBitmapsA() code implements
** support for outline fonts.  In combination they hopefully give
** fairly generic support for fonts.
*/
static BOOL wglUseFontBitmaps_FX(HDC fontDevice, DWORD firstChar,
                                 DWORD numChars, DWORD listBase)
{
#define VERIFY(a) a

  TEXTMETRIC metric;
  BITMAPINFO *dibInfo;
  HDC bitDevice;
  COLORREF tempColor;
  int i;

  VERIFY(GetTextMetrics(fontDevice, &metric));

  dibInfo = (BITMAPINFO *) calloc(sizeof(BITMAPINFO) + sizeof(RGBQUAD), 1);
  dibInfo->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
  dibInfo->bmiHeader.biPlanes = 1;
  dibInfo->bmiHeader.biBitCount = 1;
  dibInfo->bmiHeader.biCompression = BI_RGB;

  bitDevice = CreateCompatibleDC(fontDevice);
  // HDC bitDevice = CreateDC("DISPLAY", NULL, NULL, NULL);
  // VERIFY(bitDevice);

  // Swap fore and back colors so the bitmap has the right polarity
  tempColor = GetBkColor(bitDevice);
  SetBkColor(bitDevice, GetTextColor(bitDevice));
  SetTextColor(bitDevice, tempColor);

  // Place chars based on base line
  VERIFY(SetTextAlign(bitDevice, TA_BASELINE) != GDI_ERROR ? 1 : 0);

  for(i = 0; i < (int)numChars; i++) {
    SIZE size;
    char curChar;
    int charWidth,charHeight,bmapWidth,bmapHeight,numBytes,res;
    HBITMAP bitObject;
    HGDIOBJ origBmap;
    unsigned char *bmap;

    curChar = i + firstChar;

    // Find how high/wide this character is
    VERIFY(GetTextExtentPoint32(bitDevice, &curChar, 1, &size));

    // Create the output bitmap
    charWidth = size.cx;
    charHeight = size.cy;
    bmapWidth = ((charWidth + 31) / 32) * 32;   // Round up to the next multiple of 32 bits
    bmapHeight = charHeight;
    bitObject = CreateCompatibleBitmap(bitDevice,
                                       bmapWidth,
                                       bmapHeight);
    //VERIFY(bitObject);

    // Assign the output bitmap to the device
    origBmap = SelectObject(bitDevice, bitObject);
    (void) VERIFY(origBmap);

    VERIFY( PatBlt( bitDevice, 0, 0, bmapWidth, bmapHeight,BLACKNESS ) );

    // Use our source font on the device
    VERIFY(SelectObject(bitDevice, GetCurrentObject(fontDevice,OBJ_FONT)));

    // Draw the character
    VERIFY(TextOut(bitDevice, 0, metric.tmAscent, &curChar, 1));

    // Unselect our bmap object
    VERIFY(SelectObject(bitDevice, origBmap));

    // Convert the display dependant representation to a 1 bit deep DIB
    numBytes = (bmapWidth * bmapHeight) / 8;
    bmap = malloc(numBytes);
    dibInfo->bmiHeader.biWidth = bmapWidth;
    dibInfo->bmiHeader.biHeight = bmapHeight;
    res = GetDIBits(bitDevice, bitObject, 0, bmapHeight, bmap,
                    dibInfo,
                    DIB_RGB_COLORS);
    //VERIFY(res);

    // Create the GL object
    glNewList(i + listBase, GL_COMPILE);
    glBitmap(bmapWidth, bmapHeight, 0.0, metric.tmDescent,
             charWidth, 0.0,
             bmap);
    glEndList();
    // CheckGL();

    // Destroy the bmap object
    DeleteObject(bitObject);

    // Deallocate the bitmap data
    free(bmap);
  }

  // Destroy the DC
  VERIFY(DeleteDC(bitDevice));

  free(dibInfo);

  return TRUE;
#undef VERIFY
}

WGLAPI BOOL GLAPIENTRY wglUseFontBitmapsA(HDC hdc, DWORD first,
                                       DWORD count, DWORD listBase)
{
   int i;
   GLuint font_list;
   DWORD size;
   GLYPHMETRICS gm;
   HANDLE hBits;
   LPSTR lpBits;
   MAT2 mat;
   int  success = TRUE;

   if (count == 0)
      return FALSE;

   font_list = listBase;

   mat.eM11 = FixedFromDouble(1);
   mat.eM12 = FixedFromDouble(0);
   mat.eM21 = FixedFromDouble(0);
   mat.eM22 = FixedFromDouble(-1);

   memset(&gm,0,sizeof(gm));

   /*
   ** If we can't get the glyph outline, it may be because this is a fixed
   ** font.  Try processing it that way.
   */
   if( GetGlyphOutline(hdc, first, GGO_BITMAP, &gm, 0, NULL, &mat)
       == GDI_ERROR )
   {
       return wglUseFontBitmaps_FX( hdc, first, count, listBase );
   }

   /*
   ** Otherwise process all desired characters.
   */
   for (i = 0; i < (int)count; i++)
   {
       DWORD err;
       
      glNewList( font_list+i, GL_COMPILE );

      /* allocate space for the bitmap/outline */
      size = GetGlyphOutline(hdc, first + i, GGO_BITMAP, &gm, 0, NULL, &mat);
      if (size == GDI_ERROR)
      {
         glEndList( );
         err = GetLastError();
         success = FALSE;
         continue;
      }

      hBits  = GlobalAlloc(GHND, size+1);
      lpBits = GlobalLock(hBits);

      err = 
      GetGlyphOutline(hdc,    /* handle to device context */
                      first + i,          /* character to query */
                      GGO_BITMAP,         /* format of data to return */
                      &gm,                /* pointer to structure for metrics*/
                      size,               /* size of buffer for data */
                      lpBits,             /* pointer to buffer for data */
                      &mat                /* pointer to transformation */
                                          /* matrix structure */
                  );

      if (err == GDI_ERROR)
      {
         GlobalUnlock(hBits);
         GlobalFree(hBits);
         
         glEndList( );
         err = GetLastError();
         success = FALSE;
         continue;
      }

      glBitmap(gm.gmBlackBoxX,gm.gmBlackBoxY,
               -gm.gmptGlyphOrigin.x,
               gm.gmptGlyphOrigin.y,
               gm.gmCellIncX,gm.gmCellIncY,
               (const GLubyte * )lpBits);

      GlobalUnlock(hBits);
      GlobalFree(hBits);

      glEndList( );
   }

   return success;
}


WGLAPI BOOL GLAPIENTRY wglUseFontBitmapsW(HDC hdc,DWORD first,DWORD count,DWORD listBase)
{
    (void) hdc; (void) first; (void) count; (void) listBase;
    return FALSE;
}

WGLAPI BOOL GLAPIENTRY wglUseFontOutlinesA(HDC hdc,DWORD first,DWORD count,
                                  DWORD listBase,FLOAT deviation,
                                  FLOAT extrusion,int format,
                                  LPGLYPHMETRICSFLOAT lpgmf)
{
    (void) hdc; (void) first; (void) count;
    (void) listBase; (void) deviation; (void) extrusion; (void) format;
    (void) lpgmf;
    SetLastError(0);
    return(FALSE);
}

WGLAPI BOOL GLAPIENTRY wglUseFontOutlinesW(HDC hdc,DWORD first,DWORD count,
                                  DWORD listBase,FLOAT deviation,
                                  FLOAT extrusion,int format,
                                  LPGLYPHMETRICSFLOAT lpgmf)
{
    (void) hdc; (void) first; (void) count;
    (void) listBase; (void) deviation; (void) extrusion; (void) format;
    (void) lpgmf;
    SetLastError(0);
    return(FALSE);
}

WGLAPI BOOL GLAPIENTRY wglDescribeLayerPlane(HDC hdc,int iPixelFormat,
                                    int iLayerPlane,UINT nBytes,
                                    LPLAYERPLANEDESCRIPTOR plpd)
{
    (void) hdc; (void) iPixelFormat; (void) iLayerPlane; (void) nBytes; (void) plpd;
    SetLastError(0);
    return(FALSE);
}

WGLAPI int GLAPIENTRY wglSetLayerPaletteEntries(HDC hdc,int iLayerPlane,
                                       int iStart,int cEntries,
                                       CONST COLORREF *pcr)
{
    (void) hdc; (void) iLayerPlane; (void) iStart; (void) cEntries; (void) pcr;
    SetLastError(0);
    return(0);
}

WGLAPI int GLAPIENTRY wglGetLayerPaletteEntries(HDC hdc,int iLayerPlane,
                                       int iStart,int cEntries,
                                       COLORREF *pcr)
{
    (void) hdc; (void) iLayerPlane; (void) iStart; (void) cEntries; (void) pcr;
    SetLastError(0);
    return(0);
}

WGLAPI BOOL GLAPIENTRY wglRealizeLayerPalette(HDC hdc,int iLayerPlane,BOOL bRealize)
{
    (void) hdc; (void) iLayerPlane; (void) bRealize;
    SetLastError(0);
    return(FALSE);
}

WGLAPI BOOL GLAPIENTRY wglSwapLayerBuffers(HDC hdc,UINT fuPlanes)
{
    (void) fuPlanes;
    if( !hdc )
    {
        WMesaSwapBuffers();
        return(TRUE);
    }
    SetLastError(0);
    return(FALSE);
}

WGLAPI int GLAPIENTRY wglChoosePixelFormat(HDC hdc,
                                  CONST PIXELFORMATDESCRIPTOR *ppfd)
{
    int		i,best = -1,bestdelta = 0x7FFFFFFF,delta,qt_valid_pix;
    (void) hdc;

    qt_valid_pix = qt_pix;
    if(ppfd->nSize != sizeof(PIXELFORMATDESCRIPTOR) || ppfd->nVersion != 1)
    {
        SetLastError(0);
        return(0);
    }
    for(i = 0;i < qt_valid_pix;i++)
    {
        delta = 0;
        if(
            (ppfd->dwFlags & PFD_DRAW_TO_WINDOW) &&
            !(pix[i].pfd.dwFlags & PFD_DRAW_TO_WINDOW))
            continue;
        if(
            (ppfd->dwFlags & PFD_DRAW_TO_BITMAP) &&
            !(pix[i].pfd.dwFlags & PFD_DRAW_TO_BITMAP))
            continue;
        if(
            (ppfd->dwFlags & PFD_SUPPORT_GDI) &&
            !(pix[i].pfd.dwFlags & PFD_SUPPORT_GDI))
            continue;
        if(
            (ppfd->dwFlags & PFD_SUPPORT_OPENGL) &&
            !(pix[i].pfd.dwFlags & PFD_SUPPORT_OPENGL))
            continue;
        if(
            !(ppfd->dwFlags & PFD_DOUBLEBUFFER_DONTCARE) &&
            ((ppfd->dwFlags & PFD_DOUBLEBUFFER) != (pix[i].pfd.dwFlags & PFD_DOUBLEBUFFER)))
            continue;
        if(
            !(ppfd->dwFlags & PFD_STEREO_DONTCARE) &&
            ((ppfd->dwFlags & PFD_STEREO) != (pix[i].pfd.dwFlags & PFD_STEREO)))
            continue;
        if(ppfd->iPixelType != pix[i].pfd.iPixelType)
            delta++;
        if(ppfd->cAlphaBits != pix[i].pfd.cAlphaBits)
            delta++;
        if(delta < bestdelta)
        {
            best = i + 1;
            bestdelta = delta;
            if(bestdelta == 0)
                break;
        }
    }
    if(best == -1)
    {
        SetLastError(0);
        return(0);
    }
    return(best);
}

WGLAPI int GLAPIENTRY wglDescribePixelFormat(HDC hdc,int iPixelFormat,UINT nBytes,
                                    LPPIXELFORMATDESCRIPTOR ppfd)
{
    int		qt_valid_pix;
    (void) hdc;

    qt_valid_pix = qt_pix;
    if(ppfd == NULL)
	return(qt_valid_pix);
    if(iPixelFormat < 1 || iPixelFormat > qt_valid_pix || nBytes != sizeof(PIXELFORMATDESCRIPTOR))
    {
        SetLastError(0);
        return(0);
    }
    *ppfd = pix[iPixelFormat - 1].pfd;
    return(qt_valid_pix);
}

/*
* GetProcAddress - return the address of an appropriate extension
*/
WGLAPI PROC GLAPIENTRY wglGetProcAddress(LPCSTR lpszProc)
{
   PROC p = (PROC) _glapi_get_proc_address((const char *) lpszProc);
   if (p)
      return p;

   SetLastError(0);
   return(NULL);
}

WGLAPI int GLAPIENTRY wglGetPixelFormat(HDC hdc)
{
    (void) hdc;
    if(curPFD == 0)
    {
        SetLastError(0);
        return(0);
    }
    return(curPFD);
}

WGLAPI BOOL GLAPIENTRY wglSetPixelFormat(HDC hdc,int iPixelFormat,
                                PIXELFORMATDESCRIPTOR *ppfd)
{
    int		qt_valid_pix;
    (void) hdc;

    qt_valid_pix = qt_pix;
    if(iPixelFormat < 1 || iPixelFormat > qt_valid_pix || ppfd->nSize != sizeof(PIXELFORMATDESCRIPTOR))
    {
        SetLastError(0);
        return(FALSE);
    }
    curPFD = iPixelFormat;
    return(TRUE);
}

WGLAPI BOOL GLAPIENTRY wglSwapBuffers(HDC hdc)
{
   (void) hdc;
   if (ctx_current < 0)
      return FALSE;

   if(wgl_ctx[ctx_current].ctx == NULL) {
      SetLastError(0);
      return(FALSE);
   }
   WMesaSwapBuffers();
   return(TRUE);
}

#endif /* WIN32 */