summaryrefslogtreecommitdiff
path: root/src/mesa/main/dd.h
blob: fff457b4667992d72c9e3e9fe5954d7e692ff811 (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
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
/* $Id: dd.h,v 1.63 2001/11/18 22:48:11 brianp Exp $ */

/*
 * Mesa 3-D graphics library
 * Version:  3.5
 *
 * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */



#ifndef DD_INCLUDED
#define DD_INCLUDED

/* THIS FILE ONLY INCLUDED BY mtypes.h !!!!! */

struct gl_pixelstore_attrib;

/* Mask bits sent to the driver Clear() function */
#define DD_FRONT_LEFT_BIT  FRONT_LEFT_BIT         /* 1 */
#define DD_FRONT_RIGHT_BIT FRONT_RIGHT_BIT        /* 2 */
#define DD_BACK_LEFT_BIT   BACK_LEFT_BIT          /* 4 */
#define DD_BACK_RIGHT_BIT  BACK_RIGHT_BIT         /* 8 */
#define DD_DEPTH_BIT       GL_DEPTH_BUFFER_BIT    /* 0x00000100 */
#define DD_STENCIL_BIT     GL_STENCIL_BUFFER_BIT  /* 0x00000400 */
#define DD_ACCUM_BIT       GL_ACCUM_BUFFER_BIT    /* 0x00000200 */


/*
 * Device Driver function table.
 */
struct dd_function_table {

   /**********************************************************************
    *** Mandatory functions:  these functions must be implemented by   ***
    *** every device driver.                                           ***
    **********************************************************************/

   const GLubyte * (*GetString)( GLcontext *ctx, GLenum name );
   /* Return a string as needed by glGetString().
    * Only the GL_RENDERER token must be implemented.  Otherwise,
    * NULL can be returned.
    */

   void (*UpdateState)( GLcontext *ctx, GLuint new_state );
   /*
    * UpdateState() is called to notify the driver after Mesa has made
    * some internal state changes.  This is in addition to any
    * statechange callbacks Mesa may already have made.
    */

   void (*Clear)( GLcontext *ctx, GLbitfield mask, GLboolean all,
		  GLint x, GLint y, GLint width, GLint height );
   /* Clear the color/depth/stencil/accum buffer(s).
    * 'mask' is a bitmask of the DD_*_BIT values defined above that indicates
    * which buffers need to be cleared.
    * If 'all' is true then the clear the whole buffer, else clear only the
    * region defined by (x,y,width,height).
    * This function must obey the glColorMask, glIndexMask and glStencilMask
    * settings!  Software Mesa can do masked clears if the device driver can't.
    */

   GLboolean (*SetDrawBuffer)( GLcontext *ctx, GLenum buffer );
   /*
    * Specifies the current buffer for writing.
    * The following values must be accepted when applicable:
    *    GL_FRONT_LEFT - this buffer always exists
    *    GL_BACK_LEFT - when double buffering
    *    GL_FRONT_RIGHT - when using stereo
    *    GL_BACK_RIGHT - when using stereo and double buffering
    * The folowing values may optionally be accepted.  Return GL_TRUE
    * if accepted, GL_FALSE if not accepted.  In practice, only drivers
    * which can write to multiple color buffers at once should accept
    * these values.
    *    GL_FRONT - write to front left and front right if it exists
    *    GL_BACK - write to back left and back right if it exists
    *    GL_LEFT - write to front left and back left if it exists
    *    GL_RIGHT - write to right left and back right if they exist
    *    GL_FRONT_AND_BACK - write to all four buffers if they exist
    *    GL_NONE - disable buffer write in device driver.
    */

   void (*GetBufferSize)( GLcontext *ctx, GLuint *width, GLuint *height );
   /*
    * Returns the width and height of the current color buffer.
    */

   void (*Finish)( GLcontext *ctx );
   /*
    * This is called whenever glFinish() is called.
    */

   void (*Flush)( GLcontext *ctx );
   /*
    * This is called whenever glFlush() is called.
    */

   void (*Error)( GLcontext *ctx );
   /*
    * Called whenever an error is generated.  ctx->ErrorValue contains
    * the error value.
    */


   /***
    *** For hardware accumulation buffer:
    ***/
   void (*Accum)( GLcontext *ctx, GLenum op, GLfloat value,
		  GLint xpos, GLint ypos, GLint width, GLint height );
   /* Execute glAccum command within the given scissor region.
    */


   /***
    *** glDraw/Read/CopyPixels and glBitmap functions:
    ***/

   void (*DrawPixels)( GLcontext *ctx,
		       GLint x, GLint y, GLsizei width, GLsizei height,
		       GLenum format, GLenum type,
		       const struct gl_pixelstore_attrib *unpack,
		       const GLvoid *pixels );
   /* This is called by glDrawPixels.
    * 'unpack' describes how to unpack the source image data.
    */

   void (*ReadPixels)( GLcontext *ctx,
		       GLint x, GLint y, GLsizei width, GLsizei height,
		       GLenum format, GLenum type,
		       const struct gl_pixelstore_attrib *unpack,
		       GLvoid *dest );
   /* Called by glReadPixels.
    */

   void (*CopyPixels)( GLcontext *ctx,
                            GLint srcx, GLint srcy,
                            GLsizei width, GLsizei height,
                            GLint dstx, GLint dsty, GLenum type );
   /* Do a glCopyPixels.  This function must respect all rasterization
    * state, glPixelTransfer, glPixelZoom, etc.
    */

   void (*Bitmap)( GLcontext *ctx,
		   GLint x, GLint y, GLsizei width, GLsizei height,
		   const struct gl_pixelstore_attrib *unpack,
		   const GLubyte *bitmap );
   /* This is called by glBitmap.  Works the same as DrawPixels, above.
    */

   void (*ResizeBuffersMESA)( GLcontext *ctx );


   /***
    *** Texture image functions:
    ***/
   const struct gl_texture_format *
   (*ChooseTextureFormat)( GLcontext *ctx, GLint internalFormat,
                           GLenum srcFormat, GLenum srcType );
   /* This is called by the _mesa_store_tex[sub]image[123]d() fallback
    * functions.  The driver should examine <internalFormat> and return a
    * pointer to an appropriate gl_texture_format.
    */

   void (*TexImage1D)( GLcontext *ctx, GLenum target, GLint level,
                       GLint internalFormat,
                       GLint width, GLint border,
                       GLenum format, GLenum type, const GLvoid *pixels,
                       const struct gl_pixelstore_attrib *packing,
                       struct gl_texture_object *texObj,
                       struct gl_texture_image *texImage );
   void (*TexImage2D)( GLcontext *ctx, GLenum target, GLint level,
                       GLint internalFormat,
                       GLint width, GLint height, GLint border,
                       GLenum format, GLenum type, const GLvoid *pixels,
                       const struct gl_pixelstore_attrib *packing,
                       struct gl_texture_object *texObj,
                       struct gl_texture_image *texImage );
   void (*TexImage3D)( GLcontext *ctx, GLenum target, GLint level,
                       GLint internalFormat,
                       GLint width, GLint height, GLint depth, GLint border,
                       GLenum format, GLenum type, const GLvoid *pixels,
                       const struct gl_pixelstore_attrib *packing,
                       struct gl_texture_object *texObj,
                       struct gl_texture_image *texImage );
   /* Called by glTexImage1/2/3D.
    * Arguments:
    *   <target>, <level>, <format>, <type> and <pixels> are user specified.
    *   <packing> indicates the image packing of pixels.
    *   <texObj> is the target texture object.
    *   <texImage> is the target texture image.  It will have the texture
    *      width, height, depth, border and internalFormat information.
    *   <retainInternalCopy> is returned by this function and indicates whether
    *      core Mesa should keep an internal copy of the texture image.
    * Drivers should call a fallback routine from texstore.c if needed.
    */

   void (*TexSubImage1D)( GLcontext *ctx, GLenum target, GLint level,
                          GLint xoffset, GLsizei width,
                          GLenum format, GLenum type,
                          const GLvoid *pixels,
                          const struct gl_pixelstore_attrib *packing,
                          struct gl_texture_object *texObj,
                          struct gl_texture_image *texImage );
   void (*TexSubImage2D)( GLcontext *ctx, GLenum target, GLint level,
                          GLint xoffset, GLint yoffset,
                          GLsizei width, GLsizei height,
                          GLenum format, GLenum type,
                          const GLvoid *pixels,
                          const struct gl_pixelstore_attrib *packing,
                          struct gl_texture_object *texObj,
                          struct gl_texture_image *texImage );
   void (*TexSubImage3D)( GLcontext *ctx, GLenum target, GLint level,
                          GLint xoffset, GLint yoffset, GLint zoffset,
                          GLsizei width, GLsizei height, GLint depth,
                          GLenum format, GLenum type,
                          const GLvoid *pixels,
                          const struct gl_pixelstore_attrib *packing,
                          struct gl_texture_object *texObj,
                          struct gl_texture_image *texImage );
   /* Called by glTexSubImage1/2/3D.
    * Arguments:
    *   <target>, <level>, <xoffset>, <yoffset>, <zoffset>, <width>, <height>,
    *      <depth>, <format>, <type> and <pixels> are user specified.
    *   <packing> indicates the image packing of pixels.
    *   <texObj> is the target texture object.
    *   <texImage> is the target texture image.  It will have the texture
    *      width, height, border and internalFormat information.
    * The driver should use a fallback routine from texstore.c if needed.
    */

   void (*CopyTexImage1D)( GLcontext *ctx, GLenum target, GLint level,
                           GLenum internalFormat, GLint x, GLint y,
                           GLsizei width, GLint border );
   void (*CopyTexImage2D)( GLcontext *ctx, GLenum target, GLint level,
                           GLenum internalFormat, GLint x, GLint y,
                           GLsizei width, GLsizei height, GLint border );
   /* Called by glCopyTexImage1D and glCopyTexImage2D.
    * Drivers should use a fallback routine from texstore.c if needed.
    */

   void (*CopyTexSubImage1D)( GLcontext *ctx, GLenum target, GLint level,
                              GLint xoffset,
                              GLint x, GLint y, GLsizei width );
   void (*CopyTexSubImage2D)( GLcontext *ctx, GLenum target, GLint level,
                              GLint xoffset, GLint yoffset,
                              GLint x, GLint y,
                              GLsizei width, GLsizei height );
   void (*CopyTexSubImage3D)( GLcontext *ctx, GLenum target, GLint level,
                              GLint xoffset, GLint yoffset, GLint zoffset,
                              GLint x, GLint y,
                              GLsizei width, GLsizei height );
   /* Called by glCopyTexSubImage1/2/3D.
    * Drivers should use a fallback routine from texstore.c if needed.
    */

   GLboolean (*TestProxyTexImage)(GLcontext *ctx, GLenum target,
                                  GLint level, GLint internalFormat,
                                  GLenum format, GLenum type,
                                  GLint width, GLint height,
                                  GLint depth, GLint border);
   /* Called by glTexImage[123]D when user specifies a proxy texture
    * target.  Return GL_TRUE if the proxy test passes, return GL_FALSE
    * if the test fails.
    */

   /***
    *** Compressed texture functions:
    ***/

   void (*CompressedTexImage1D)( GLcontext *ctx, GLenum target,
                                 GLint level, GLint internalFormat,
                                 GLsizei width, GLint border,
                                 GLsizei imageSize, const GLvoid *data,
                                 struct gl_texture_object *texObj,
                                 struct gl_texture_image *texImage );
   void (*CompressedTexImage2D)( GLcontext *ctx, GLenum target,
                                 GLint level, GLint internalFormat,
                                 GLsizei width, GLsizei height, GLint border,
                                 GLsizei imageSize, const GLvoid *data,
                                 struct gl_texture_object *texObj,
                                 struct gl_texture_image *texImage );
   void (*CompressedTexImage3D)( GLcontext *ctx, GLenum target,
                                 GLint level, GLint internalFormat,
                                 GLsizei width, GLsizei height, GLsizei depth,
                                 GLint border,
                                 GLsizei imageSize, const GLvoid *data,
                                 struct gl_texture_object *texObj,
                                 struct gl_texture_image *texImage );
   /* Called by glCompressedTexImage1/2/3D.
    * Arguments:
    *   <target>, <level>, <internalFormat>, <data> are user specified.
    *   <texObj> is the target texture object.
    *   <texImage> is the target texture image.  It will have the texture
    *      width, height, depth, border and internalFormat information.
    *   <retainInternalCopy> is returned by this function and indicates whether
    *      core Mesa should keep an internal copy of the texture image.
    * Return GL_TRUE if operation completed, return GL_FALSE if core Mesa
    * should do the job.
    */

   void (*CompressedTexSubImage1D)(GLcontext *ctx, GLenum target, GLint level,
                                   GLint xoffset, GLsizei width,
                                   GLenum format,
                                   GLsizei imageSize, const GLvoid *data,
                                   struct gl_texture_object *texObj,
                                   struct gl_texture_image *texImage);
   void (*CompressedTexSubImage2D)(GLcontext *ctx, GLenum target, GLint level,
                                   GLint xoffset, GLint yoffset,
                                   GLsizei width, GLint height,
                                   GLenum format,
                                   GLsizei imageSize, const GLvoid *data,
                                   struct gl_texture_object *texObj,
                                   struct gl_texture_image *texImage);
   void (*CompressedTexSubImage3D)(GLcontext *ctx, GLenum target, GLint level,
                                   GLint xoffset, GLint yoffset, GLint zoffset,
                                   GLsizei width, GLint height, GLint depth,
                                   GLenum format,
                                   GLsizei imageSize, const GLvoid *data,
                                   struct gl_texture_object *texObj,
                                   struct gl_texture_image *texImage);
   /* Called by glCompressedTexSubImage1/2/3D.
    * Arguments:
    *   <target>, <level>, <x/z/zoffset>, <width>, <height>, <depth>,
    *      <imageSize>, and <data> are user specified.
    *   <texObj> is the target texture object.
    *   <texImage> is the target texture image.  It will have the texture
    *      width, height, depth, border and internalFormat information.
    * Return GL_TRUE if operation completed, return GL_FALSE if core Mesa
    * should do the job.
    */

   void (*GetCompressedTexImage)( GLcontext *ctx, GLenum target,
                                  GLint level, void *image,
                                  const struct gl_texture_object *texObj,
                                  struct gl_texture_image *texImage );
   /* Called by glGetCompressedTexImageARB.
    * <target>, <level>, <image> are specified by user.
    * <texObj> is the source texture object.
    * <texImage> is the source texture image.
    */

   GLint (*BaseCompressedTexFormat)(GLcontext *ctx,
                                    GLint internalFormat);
   /* Called to compute the base format for a specific compressed
    * format.  Return -1 if the internalFormat is not a specific
    * compressed format that the driver recognizes.
    * Example: if internalFormat==GL_COMPRESSED_RGB_FXT1_3DFX, return GL_RGB.
    */

   GLint (*CompressedTextureSize)(GLcontext *ctx,
                                  const struct gl_texture_image *texImage);

#if 000
   /* ... Note the
    * return value differences between this function and
    * SpecificCompressedTexFormat below.
    */

   GLint (*SpecificCompressedTexFormat)(GLcontext *ctx,
                                        GLint      internalFormat,
                                        GLint      numDimensions,
                                        GLint     *levelp,
                                        GLsizei   *widthp,
                                        GLsizei   *heightp,
                                        GLsizei   *depthp,
                                        GLint     *borderp,
                                        GLenum    *formatp,
                                        GLenum    *typep);
   /* Called to turn a generic texture format into a specific
    * texture format.  For example, if a driver implements
    * GL_3DFX_texture_compression_FXT1, this would map
    * GL_COMPRESSED_RGBA_ARB to GL_COMPRESSED_RGBA_FXT1_3DFX.
    *
    * If the driver does not know how to handle the compressed
    * format, then just return the generic format, and Mesa will
    * do the right thing with it.
    */

#endif

   /***
    *** Texture object functions:
    ***/

   void (*BindTexture)( GLcontext *ctx, GLenum target,
                        struct gl_texture_object *tObj );
   /* Called by glBindTexture().
    */

   void (*CreateTexture)( GLcontext *ctx, struct gl_texture_object *tObj );
   /* Called when a texture object is created.
    */

   void (*DeleteTexture)( GLcontext *ctx, struct gl_texture_object *tObj );
   /* Called when a texture object is about to be deallocated.  Driver
    * should free anything attached to the DriverData pointers.
    */

   GLboolean (*IsTextureResident)( GLcontext *ctx,
                                   struct gl_texture_object *t );
   /* Called by glAreTextureResident().
    */

   void (*PrioritizeTexture)( GLcontext *ctx,  struct gl_texture_object *t,
                              GLclampf priority );
   /* Called by glPrioritizeTextures().
    */

   void (*ActiveTexture)( GLcontext *ctx, GLuint texUnitNumber );
   /* Called by glActiveTextureARB to set current texture unit.
    */

   void (*UpdateTexturePalette)( GLcontext *ctx,
                                 struct gl_texture_object *tObj );
   /* Called when the texture's color lookup table is changed.
    * If tObj is NULL then the shared texture palette ctx->Texture.Palette
    * is to be updated.
    */

   /***
    *** Imaging functionality:
    ***/
   void (*CopyColorTable)( GLcontext *ctx,
			   GLenum target, GLenum internalformat,
			   GLint x, GLint y, GLsizei width );

   void (*CopyColorSubTable)( GLcontext *ctx,
			      GLenum target, GLsizei start,
			      GLint x, GLint y, GLsizei width );

   void (*CopyConvolutionFilter1D)( GLcontext *ctx, GLenum target,
				    GLenum internalFormat,
				    GLint x, GLint y, GLsizei width );

   void (*CopyConvolutionFilter2D)( GLcontext *ctx, GLenum target,
				    GLenum internalFormat,
				    GLint x, GLint y,
				    GLsizei width, GLsizei height );



   /***
    *** State-changing functions (drawing functions are above)
    ***
    *** These functions are called by their corresponding OpenGL API functions.
    *** They're ALSO called by the gl_PopAttrib() function!!!
    *** May add more functions like these to the device driver in the future.
    ***/
   void (*AlphaFunc)(GLcontext *ctx, GLenum func, GLchan ref);
   void (*BlendColor)(GLcontext *ctx, const GLfloat color[4]);
   void (*BlendEquation)(GLcontext *ctx, GLenum mode);
   void (*BlendFunc)(GLcontext *ctx, GLenum sfactor, GLenum dfactor);
   void (*BlendFuncSeparate)(GLcontext *ctx,
                             GLenum sfactorRGB, GLenum dfactorRGB,
                             GLenum sfactorA, GLenum dfactorA);
   void (*ClearColor)(GLcontext *ctx, const GLchan color[4]);
   void (*ClearDepth)(GLcontext *ctx, GLclampd d);
   void (*ClearIndex)(GLcontext *ctx, GLuint index);
   void (*ClearStencil)(GLcontext *ctx, GLint s);
   void (*ColorMask)(GLcontext *ctx, GLboolean rmask, GLboolean gmask,
                     GLboolean bmask, GLboolean amask );
   void (*CullFace)(GLcontext *ctx, GLenum mode);
   void (*ClipPlane)(GLcontext *ctx, GLenum plane, const GLfloat *equation );
   void (*FrontFace)(GLcontext *ctx, GLenum mode);
   void (*DepthFunc)(GLcontext *ctx, GLenum func);
   void (*DepthMask)(GLcontext *ctx, GLboolean flag);
   void (*DepthRange)(GLcontext *ctx, GLclampd nearval, GLclampd farval);
   void (*Enable)(GLcontext* ctx, GLenum cap, GLboolean state);
   void (*Fogfv)(GLcontext *ctx, GLenum pname, const GLfloat *params);
   void (*Hint)(GLcontext *ctx, GLenum target, GLenum mode);
   void (*IndexMask)(GLcontext *ctx, GLuint mask);
   void (*Lightfv)(GLcontext *ctx, GLenum light,
		   GLenum pname, const GLfloat *params );
   void (*LightModelfv)(GLcontext *ctx, GLenum pname, const GLfloat *params);
   void (*LineStipple)(GLcontext *ctx, GLint factor, GLushort pattern );
   void (*LineWidth)(GLcontext *ctx, GLfloat width);
   void (*LogicOpcode)(GLcontext *ctx, GLenum opcode);
   void (*PointParameterfv)(GLcontext *ctx, GLenum pname,
                            const GLfloat *params);
   void (*PointSize)(GLcontext *ctx, GLfloat size);
   void (*PolygonMode)(GLcontext *ctx, GLenum face, GLenum mode);
   void (*PolygonOffset)(GLcontext *ctx, GLfloat factor, GLfloat units);
   void (*PolygonStipple)(GLcontext *ctx, const GLubyte *mask );
   void (*RenderMode)(GLcontext *ctx, GLenum mode );
   void (*Scissor)(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h);
   void (*ShadeModel)(GLcontext *ctx, GLenum mode);
   void (*StencilFunc)(GLcontext *ctx, GLenum func, GLint ref, GLuint mask);
   void (*StencilMask)(GLcontext *ctx, GLuint mask);
   void (*StencilOp)(GLcontext *ctx, GLenum fail, GLenum zfail, GLenum zpass);
   void (*TexGen)(GLcontext *ctx, GLenum coord, GLenum pname,
		  const GLfloat *params);
   void (*TexEnv)(GLcontext *ctx, GLenum target, GLenum pname,
                  const GLfloat *param);
   void (*TexParameter)(GLcontext *ctx, GLenum target,
                        struct gl_texture_object *texObj,
                        GLenum pname, const GLfloat *params);
   void (*TextureMatrix)(GLcontext *ctx, GLuint unit, const GLmatrix *mat);
   void (*Viewport)(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h);


   /***
    *** Vertex array functions
    ***
    *** Called by the corresponding OpenGL functions.
    ***/
   void (*VertexPointer)(GLcontext *ctx, GLint size, GLenum type,
			 GLsizei stride, const GLvoid *ptr);
   void (*NormalPointer)(GLcontext *ctx, GLenum type,
			 GLsizei stride, const GLvoid *ptr);
   void (*ColorPointer)(GLcontext *ctx, GLint size, GLenum type,
			GLsizei stride, const GLvoid *ptr);
   void (*FogCoordPointer)(GLcontext *ctx, GLenum type,
			   GLsizei stride, const GLvoid *ptr);
   void (*IndexPointer)(GLcontext *ctx, GLenum type,
			GLsizei stride, const GLvoid *ptr);
   void (*SecondaryColorPointer)(GLcontext *ctx, GLint size, GLenum type,
				 GLsizei stride, const GLvoid *ptr);
   void (*TexCoordPointer)(GLcontext *ctx, GLint size, GLenum type,
			   GLsizei stride, const GLvoid *ptr);
   void (*EdgeFlagPointer)(GLcontext *ctx, GLsizei stride, const GLvoid *ptr);


   /*** State-query functions
    ***
    *** Return GL_TRUE if query was completed, GL_FALSE otherwise.
    ***/
   GLboolean (*GetBooleanv)(GLcontext *ctx, GLenum pname, GLboolean *result);
   GLboolean (*GetDoublev)(GLcontext *ctx, GLenum pname, GLdouble *result);
   GLboolean (*GetFloatv)(GLcontext *ctx, GLenum pname, GLfloat *result);
   GLboolean (*GetIntegerv)(GLcontext *ctx, GLenum pname, GLint *result);
   GLboolean (*GetPointerv)(GLcontext *ctx, GLenum pname, GLvoid **result);



   /***
    *** Support for multiple t&l engines
    ***/

   GLuint NeedValidate;
   /* Bitmask of state changes that require the current tnl module to be
    * validated, using ValidateTnlModule() below.
    */

   void (*ValidateTnlModule)( GLcontext *ctx, GLuint new_state );
   /* Validate the current tnl module.  This is called directly after
    * UpdateState() when a state change that has occured matches the
    * NeedValidate bitmask above.  This ensures all computed values are
    * up to date, thus allowing the driver to decide if the current tnl
    * module needs to be swapped out.
    *
    * This must be non-NULL if a driver installs a custom tnl module and
    * sets the NeedValidate bitmask, but may be NULL otherwise.
    */


#define PRIM_OUTSIDE_BEGIN_END   GL_POLYGON+1
#define PRIM_INSIDE_UNKNOWN_PRIM GL_POLYGON+2
#define PRIM_UNKNOWN             GL_POLYGON+3

   GLuint CurrentExecPrimitive;
   /* Set by the driver-supplied t&l engine.  Set to
    * PRIM_OUTSIDE_BEGIN_END when outside begin/end.
    */

   GLuint CurrentSavePrimitive;
   /* Current state of an in-progress compilation.  May take on any of
    * the additional values defined above.
    */


#define FLUSH_STORED_VERTICES 0x1
#define FLUSH_UPDATE_CURRENT  0x2
   GLuint NeedFlush;
   /* Set by the driver-supplied t&l engine whenever vertices are
    * buffered between begin/end objects or ctx->Current is not uptodate.
    *
    * The FlushVertices() call below may be used to resolve
    * these conditions.
    */

   void (*FlushVertices)( GLcontext *ctx, GLuint flags );
   /* If inside begin/end, ASSERT(0).
    * Otherwise,
    *   if (flags & FLUSH_STORED_VERTICES) flushes any buffered vertices,
    *   if (flags & FLUSH_UPDATE_CURRENT) updates ctx->Current
    *                                     and ctx->Light.Material
    *
    * Note that the default t&l engine never clears the
    * FLUSH_UPDATE_CURRENT bit, even after performing the update.
    */

   void (*LightingSpaceChange)( GLcontext *ctx );
   /* Notify driver that the special derived value _NeedEyeCoords has
    * changed.
    */

   void (*NewList)( GLcontext *ctx, GLuint list, GLenum mode );
   void (*EndList)( GLcontext *ctx );
   /* Let the t&l component know what is going on with display lists
    * in time to make changes to dispatch tables, etc.
    * Called by glNewList() and glEndList(), respectively.
    */

   void (*BeginCallList)( GLcontext *ctx, GLuint list );
   void (*EndCallList)( GLcontext *ctx );
   /* Notify the t&l component before and after calling a display list.
    * Called by glCallList(s), but not recursively.
    */

   void (*MakeCurrent)( GLcontext *ctx, GLframebuffer *drawBuffer,
			GLframebuffer *readBuffer );
   /* Let the t&l component know when the context becomes current.
    */


   void (*LockArraysEXT)( GLcontext *ctx, GLint first, GLsizei count );
   void (*UnlockArraysEXT)( GLcontext *ctx );
   /* Called by glLockArraysEXT() and glUnlockArraysEXT(), respectively.
    */

};



/*
 * Transform/Clip/Lighting interface
 */
typedef struct {
   void (*ArrayElement)( GLint ); /* NOTE */
   void (*Color3f)( GLfloat, GLfloat, GLfloat );
   void (*Color3fv)( const GLfloat * );
   void (*Color3ub)( GLubyte, GLubyte, GLubyte );
   void (*Color3ubv)( const GLubyte * );
   void (*Color4f)( GLfloat, GLfloat, GLfloat, GLfloat );
   void (*Color4fv)( const GLfloat * );
   void (*Color4ub)( GLubyte, GLubyte, GLubyte, GLubyte );
   void (*Color4ubv)( const GLubyte * );
   void (*EdgeFlag)( GLboolean );
   void (*EdgeFlagv)( const GLboolean * );
   void (*EvalCoord1f)( GLfloat );          /* NOTE */
   void (*EvalCoord1fv)( const GLfloat * ); /* NOTE */
   void (*EvalCoord2f)( GLfloat, GLfloat ); /* NOTE */
   void (*EvalCoord2fv)( const GLfloat * ); /* NOTE */
   void (*EvalPoint1)( GLint );             /* NOTE */
   void (*EvalPoint2)( GLint, GLint );      /* NOTE */
   void (*FogCoordfEXT)( GLfloat );
   void (*FogCoordfvEXT)( const GLfloat * );
   void (*Indexi)( GLint );
   void (*Indexiv)( const GLint * );
   void (*Materialfv)( GLenum face, GLenum pname, const GLfloat * ); /* NOTE */
   void (*MultiTexCoord1f)( GLenum, GLfloat );
   void (*MultiTexCoord1fv)( GLenum, const GLfloat * );
   void (*MultiTexCoord2f)( GLenum, GLfloat, GLfloat );
   void (*MultiTexCoord2fv)( GLenum, const GLfloat * );
   void (*MultiTexCoord3f)( GLenum, GLfloat, GLfloat, GLfloat );
   void (*MultiTexCoord3fv)( GLenum, const GLfloat * );
   void (*MultiTexCoord4f)( GLenum, GLfloat, GLfloat, GLfloat, GLfloat );
   void (*MultiTexCoord4fv)( GLenum, const GLfloat * );
   void (*Normal3f)( GLfloat, GLfloat, GLfloat );
   void (*Normal3fv)( const GLfloat * );
   void (*SecondaryColor3fEXT)( GLfloat, GLfloat, GLfloat );
   void (*SecondaryColor3fvEXT)( const GLfloat * );
   void (*SecondaryColor3ubEXT)( GLubyte, GLubyte, GLubyte );
   void (*SecondaryColor3ubvEXT)( const GLubyte * );
   void (*TexCoord1f)( GLfloat );
   void (*TexCoord1fv)( const GLfloat * );
   void (*TexCoord2f)( GLfloat, GLfloat );
   void (*TexCoord2fv)( const GLfloat * );
   void (*TexCoord3f)( GLfloat, GLfloat, GLfloat );
   void (*TexCoord3fv)( const GLfloat * );
   void (*TexCoord4f)( GLfloat, GLfloat, GLfloat, GLfloat );
   void (*TexCoord4fv)( const GLfloat * );
   void (*Vertex2f)( GLfloat, GLfloat );
   void (*Vertex2fv)( const GLfloat * );
   void (*Vertex3f)( GLfloat, GLfloat, GLfloat );
   void (*Vertex3fv)( const GLfloat * );
   void (*Vertex4f)( GLfloat, GLfloat, GLfloat, GLfloat );
   void (*Vertex4fv)( const GLfloat * );
   void (*CallList)( GLuint );	/* NOTE */
   void (*Begin)( GLenum );
   void (*End)( void );
   /* Drivers present a reduced set of the functions possible in
    * begin/end objects.  Core mesa provides translation stubs for the
    * remaining functions to map down to these entrypoints.
    *
    * These are the initial values to be installed into dispatch by
    * mesa.  If the t&l driver wants to modify the dispatch table
    * while installed, it must do so itself.  It would be possible for
    * the vertexformat to install it's own initial values for these
    * functions, but this way there is an obvious list of what is
    * expected of the driver.
    *
    * If the driver wants to hook in entrypoints other than those
    * listed above, it must restore them to their original values in
    * the disable() callback, below.
    */

   void (*Rectf)( GLfloat, GLfloat, GLfloat, GLfloat );
   /*
    */

   void (*DrawArrays)( GLenum mode, GLint start, GLsizei count );
   void (*DrawElements)( GLenum mode, GLsizei count, GLenum type,
			 const GLvoid *indices );
   void (*DrawRangeElements)( GLenum mode, GLuint start,
			      GLuint end, GLsizei count,
			      GLenum type, const GLvoid *indices );
   /* These may or may not belong here.  Heuristic: If an array is
    * enabled, the installed vertex format should support that array and
    * it's current size natively.
    */

   void (*EvalMesh1)( GLenum mode, GLint i1, GLint i2 );
   void (*EvalMesh2)( GLenum mode, GLint i1, GLint i2, GLint j1, GLint j2 );
   /* If you don't support eval, fallback to the default vertex format
    * on receiving an eval call and use the pipeline mechanism to
    * provide partial t&l acceleration.
    *
    * Mesa will provide a set of helper functions to do eval within
    * accelerated vertex formats, eventually...
    */

   GLboolean prefer_float_colors;
   /* Should core try to send colors to glColor4f or glColor4chan,
    * where it has a choice?
    */
} GLvertexformat;


#endif /* DD_INCLUDED */