s_context.c revision 853bda3e7c4dfa7d8cc462729f6a3dce89e44963 
1/*
2 * Mesa 3-D graphics library
3 * Version:  5.1
4 *
5 * Copyright (C) 1999-2003  Brian Paul   All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 *    Keith Whitwell <keith@tungstengraphics.com>
26 *    Brian Paul
27 */
28
29#include "imports.h"
30#include "context.h"
31#include "mtypes.h"
32#include "texobj.h"
33#include "nvfragprog.h"
34
35#include "swrast.h"
36#include "s_blend.h"
37#include "s_context.h"
38#include "s_lines.h"
39#include "s_points.h"
40#include "s_span.h"
41#include "s_triangle.h"
42#include "s_texture.h"
43
44
45/*
46 * Recompute the value of swrast->_RasterMask, etc. according to
47 * the current context.
48 */
49static void
50_swrast_update_rasterflags( GLcontext *ctx )
51{
52   GLuint RasterMask = 0;
53
54   if (ctx->Color.AlphaEnabled)           RasterMask |= ALPHATEST_BIT;
55   if (ctx->Color.BlendEnabled)           RasterMask |= BLEND_BIT;
56   if (ctx->Depth.Test)                   RasterMask |= DEPTH_BIT;
57   if (ctx->Fog.Enabled)                  RasterMask |= FOG_BIT;
58   if (ctx->Scissor.Enabled)              RasterMask |= CLIP_BIT;
59   if (ctx->Stencil.Enabled)              RasterMask |= STENCIL_BIT;
60   if (ctx->Visual.rgbMode) {
61      const GLuint colorMask = *((GLuint *) &ctx->Color.ColorMask);
62      if (colorMask != 0xffffffff)        RasterMask |= MASKING_BIT;
63      if (ctx->Color._LogicOpEnabled)     RasterMask |= LOGIC_OP_BIT;
64      if (ctx->Texture._EnabledUnits)     RasterMask |= TEXTURE_BIT;
65   }
66   else {
67      if (ctx->Color.IndexMask != 0xffffffff) RasterMask |= MASKING_BIT;
68      if (ctx->Color.IndexLogicOpEnabled)     RasterMask |= LOGIC_OP_BIT;
69   }
70
71   if (ctx->DrawBuffer->UseSoftwareAlphaBuffers
72       && ctx->Color.ColorMask[ACOMP]
73       && ctx->Color.DrawBuffer != GL_NONE)
74      RasterMask |= ALPHABUF_BIT;
75
76   if (   ctx->Viewport.X < 0
77       || ctx->Viewport.X + ctx->Viewport.Width > (GLint) ctx->DrawBuffer->Width
78       || ctx->Viewport.Y < 0
79       || ctx->Viewport.Y + ctx->Viewport.Height > (GLint) ctx->DrawBuffer->Height) {
80      RasterMask |= CLIP_BIT;
81   }
82
83   if (ctx->Depth.OcclusionTest || ctx->Occlusion.Active)
84      RasterMask |= OCCLUSION_BIT;
85
86
87   /* If we're not drawing to exactly one color buffer set the
88    * MULTI_DRAW_BIT flag.  Also set it if we're drawing to no
89    * buffers or the RGBA or CI mask disables all writes.
90    */
91   if (ctx->Color._DrawDestMask != FRONT_LEFT_BIT &&
92       ctx->Color._DrawDestMask != BACK_LEFT_BIT &&
93       ctx->Color._DrawDestMask != FRONT_RIGHT_BIT &&
94       ctx->Color._DrawDestMask != BACK_RIGHT_BIT) {
95      /* more than one color buffer designated for writing (or zero buffers) */
96      RasterMask |= MULTI_DRAW_BIT;
97   }
98   else if (ctx->Visual.rgbMode && *((GLuint *) ctx->Color.ColorMask) == 0) {
99      RasterMask |= MULTI_DRAW_BIT; /* all RGBA channels disabled */
100   }
101   else if (!ctx->Visual.rgbMode && ctx->Color.IndexMask==0) {
102      RasterMask |= MULTI_DRAW_BIT; /* all color index bits disabled */
103   }
104
105   if (ctx->FragmentProgram.Enabled) {
106      RasterMask |= FRAGPROG_BIT;
107   }
108
109   SWRAST_CONTEXT(ctx)->_RasterMask = RasterMask;
110}
111
112
113static void
114_swrast_update_polygon( GLcontext *ctx )
115{
116   GLfloat backface_sign = 1;
117
118   if (ctx->Polygon.CullFlag) {
119      backface_sign = 1;
120      switch(ctx->Polygon.CullFaceMode) {
121      case GL_BACK:
122	 if(ctx->Polygon.FrontFace==GL_CCW)
123	    backface_sign = -1;
124	 break;
125      case GL_FRONT:
126	 if(ctx->Polygon.FrontFace!=GL_CCW)
127	    backface_sign = -1;
128	 break;
129      default:
130      case GL_FRONT_AND_BACK:
131	 backface_sign = 0;
132	 break;
133      }
134   }
135   else {
136      backface_sign = 0;
137   }
138
139   SWRAST_CONTEXT(ctx)->_BackfaceSign = backface_sign;
140}
141
142
143static void
144_swrast_update_hint( GLcontext *ctx )
145{
146   SWcontext *swrast = SWRAST_CONTEXT(ctx);
147   swrast->_PreferPixelFog = (!swrast->AllowVertexFog ||
148			      (ctx->Hint.Fog == GL_NICEST &&
149			       swrast->AllowPixelFog));
150}
151
152
153/*
154 * Update the swrast->_AnyTextureCombine flag.
155 */
156static void
157_swrast_update_texture_env( GLcontext *ctx )
158{
159   SWcontext *swrast = SWRAST_CONTEXT(ctx);
160   GLuint i;
161   swrast->_AnyTextureCombine = GL_FALSE;
162   for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
163      if (ctx->Texture.Unit[i].EnvMode == GL_COMBINE_EXT ||
164          ctx->Texture.Unit[i].EnvMode == GL_COMBINE4_NV) {
165         swrast->_AnyTextureCombine = GL_TRUE;
166         return;
167      }
168   }
169}
170
171
172#define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK |	\
173			     _NEW_TEXTURE |		\
174			     _NEW_HINT |		\
175			     _NEW_POLYGON )
176
177/* State referenced by _swrast_choose_triangle, _swrast_choose_line.
178 */
179#define _SWRAST_NEW_TRIANGLE (_SWRAST_NEW_DERIVED |		\
180			      _NEW_RENDERMODE|			\
181                              _NEW_POLYGON|			\
182                              _NEW_DEPTH|			\
183                              _NEW_STENCIL|			\
184                              _NEW_COLOR|			\
185                              _NEW_TEXTURE|			\
186                              _SWRAST_NEW_RASTERMASK|		\
187                              _NEW_LIGHT|			\
188                              _NEW_FOG |			\
189			      _DD_NEW_SEPARATE_SPECULAR)
190
191#define _SWRAST_NEW_LINE (_SWRAST_NEW_DERIVED |		\
192			  _NEW_RENDERMODE|		\
193                          _NEW_LINE|			\
194                          _NEW_TEXTURE|			\
195                          _NEW_LIGHT|			\
196                          _NEW_FOG|			\
197                          _NEW_DEPTH |			\
198                          _DD_NEW_SEPARATE_SPECULAR)
199
200#define _SWRAST_NEW_POINT (_SWRAST_NEW_DERIVED |	\
201			   _NEW_RENDERMODE |		\
202			   _NEW_POINT |			\
203			   _NEW_TEXTURE |		\
204			   _NEW_LIGHT |			\
205			   _NEW_FOG |			\
206                           _DD_NEW_SEPARATE_SPECULAR)
207
208#define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE
209
210#define _SWRAST_NEW_TEXTURE_ENV_MODE _NEW_TEXTURE
211
212#define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR
213
214
215
216/* Stub for swrast->Triangle to select a true triangle function
217 * after a state change.
218 */
219static void
220_swrast_validate_triangle( GLcontext *ctx,
221			   const SWvertex *v0,
222                           const SWvertex *v1,
223                           const SWvertex *v2 )
224{
225   SWcontext *swrast = SWRAST_CONTEXT(ctx);
226
227   _swrast_validate_derived( ctx );
228   swrast->choose_triangle( ctx );
229
230   if (ctx->Texture._EnabledUnits == 0
231       && NEED_SECONDARY_COLOR(ctx)
232       && !ctx->FragmentProgram.Enabled) {
233      /* separate specular color, but no texture */
234      swrast->SpecTriangle = swrast->Triangle;
235      swrast->Triangle = _swrast_add_spec_terms_triangle;
236   }
237
238   swrast->Triangle( ctx, v0, v1, v2 );
239}
240
241static void
242_swrast_validate_line( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1 )
243{
244   SWcontext *swrast = SWRAST_CONTEXT(ctx);
245
246   _swrast_validate_derived( ctx );
247   swrast->choose_line( ctx );
248
249   if (ctx->Texture._EnabledUnits == 0
250       && NEED_SECONDARY_COLOR(ctx)
251       && !ctx->FragmentProgram.Enabled) {
252      swrast->SpecLine = swrast->Line;
253      swrast->Line = _swrast_add_spec_terms_line;
254   }
255
256
257   swrast->Line( ctx, v0, v1 );
258}
259
260static void
261_swrast_validate_point( GLcontext *ctx, const SWvertex *v0 )
262{
263   SWcontext *swrast = SWRAST_CONTEXT(ctx);
264
265   _swrast_validate_derived( ctx );
266   swrast->choose_point( ctx );
267
268   if (ctx->Texture._EnabledUnits == 0
269       && NEED_SECONDARY_COLOR(ctx)
270       && !ctx->FragmentProgram.Enabled) {
271      swrast->SpecPoint = swrast->Point;
272      swrast->Point = _swrast_add_spec_terms_point;
273   }
274
275   swrast->Point( ctx, v0 );
276}
277
278
279static void _ASMAPI
280_swrast_validate_blend_func( GLcontext *ctx, GLuint n,
281			     const GLubyte mask[],
282			     GLchan src[][4],
283			     CONST GLchan dst[][4] )
284{
285   SWcontext *swrast = SWRAST_CONTEXT(ctx);
286
287   _swrast_validate_derived( ctx );
288   _swrast_choose_blend_func( ctx );
289
290   swrast->BlendFunc( ctx, n, mask, src, dst );
291}
292
293
294static void
295_swrast_validate_texture_sample( GLcontext *ctx, GLuint texUnit,
296				 const struct gl_texture_object *tObj,
297				 GLuint n, const GLfloat texcoords[][4],
298				 const GLfloat lambda[], GLchan rgba[][4] )
299{
300   SWcontext *swrast = SWRAST_CONTEXT(ctx);
301
302   _swrast_validate_derived( ctx );
303
304   /* Compute min/mag filter threshold */
305   if (tObj->MinFilter != tObj->MagFilter) {
306      if (tObj->MagFilter == GL_LINEAR
307          && (tObj->MinFilter == GL_NEAREST_MIPMAP_NEAREST ||
308              tObj->MinFilter == GL_NEAREST_MIPMAP_LINEAR)) {
309         swrast->_MinMagThresh[texUnit] = 0.5F;
310      }
311      else {
312         swrast->_MinMagThresh[texUnit] = 0.0F;
313      }
314   }
315
316   swrast->TextureSample[texUnit] =
317      _swrast_choose_texture_sample_func( ctx, tObj );
318
319   swrast->TextureSample[texUnit]( ctx, texUnit, tObj, n, texcoords,
320                                   lambda, rgba );
321}
322
323
324static void
325_swrast_sleep( GLcontext *ctx, GLuint new_state )
326{
327}
328
329
330static void
331_swrast_invalidate_state( GLcontext *ctx, GLuint new_state )
332{
333   SWcontext *swrast = SWRAST_CONTEXT(ctx);
334   GLuint i;
335
336   swrast->NewState |= new_state;
337
338   /* After 10 statechanges without any swrast functions being called,
339    * put the module to sleep.
340    */
341   if (++swrast->StateChanges > 10) {
342      swrast->InvalidateState = _swrast_sleep;
343      swrast->NewState = ~0;
344      new_state = ~0;
345   }
346
347   if (new_state & swrast->invalidate_triangle)
348      swrast->Triangle = _swrast_validate_triangle;
349
350   if (new_state & swrast->invalidate_line)
351      swrast->Line = _swrast_validate_line;
352
353   if (new_state & swrast->invalidate_point)
354      swrast->Point = _swrast_validate_point;
355
356   if (new_state & _SWRAST_NEW_BLEND_FUNC)
357      swrast->BlendFunc = _swrast_validate_blend_func;
358
359   if (new_state & _SWRAST_NEW_TEXTURE_SAMPLE_FUNC)
360      for (i = 0 ; i < ctx->Const.MaxTextureUnits ; i++)
361	 swrast->TextureSample[i] = _swrast_validate_texture_sample;
362
363   if (ctx->Visual.rgbMode) {
364      ASSERT(swrast->Driver.WriteRGBASpan);
365      ASSERT(swrast->Driver.WriteRGBSpan);
366      ASSERT(swrast->Driver.WriteMonoRGBASpan);
367      ASSERT(swrast->Driver.WriteRGBAPixels);
368      ASSERT(swrast->Driver.WriteMonoRGBAPixels);
369      ASSERT(swrast->Driver.ReadRGBASpan);
370      ASSERT(swrast->Driver.ReadRGBAPixels);
371   }
372   else {
373      ASSERT(swrast->Driver.WriteCI32Span);
374      ASSERT(swrast->Driver.WriteCI8Span);
375      ASSERT(swrast->Driver.WriteMonoCISpan);
376      ASSERT(swrast->Driver.WriteCI32Pixels);
377      ASSERT(swrast->Driver.WriteMonoCIPixels);
378      ASSERT(swrast->Driver.ReadCI32Span);
379      ASSERT(swrast->Driver.ReadCI32Pixels);
380   }
381}
382
383
384void
385_swrast_validate_derived( GLcontext *ctx )
386{
387   SWcontext *swrast = SWRAST_CONTEXT(ctx);
388
389   if (swrast->NewState) {
390      if (swrast->NewState & _SWRAST_NEW_RASTERMASK)
391 	 _swrast_update_rasterflags( ctx );
392
393      if (swrast->NewState & _NEW_POLYGON)
394	 _swrast_update_polygon( ctx );
395
396      if (swrast->NewState & _NEW_HINT)
397	 _swrast_update_hint( ctx );
398
399      if (swrast->NewState & _SWRAST_NEW_TEXTURE_ENV_MODE)
400	 _swrast_update_texture_env( ctx );
401
402      swrast->NewState = 0;
403      swrast->StateChanges = 0;
404      swrast->InvalidateState = _swrast_invalidate_state;
405   }
406}
407
408#define SWRAST_DEBUG 0
409
410/* Public entrypoints:  See also s_accum.c, s_bitmap.c, etc.
411 */
412void
413_swrast_Quad( GLcontext *ctx,
414	      const SWvertex *v0, const SWvertex *v1,
415              const SWvertex *v2, const SWvertex *v3 )
416{
417   if (SWRAST_DEBUG) {
418      _mesa_debug(ctx, "_swrast_Quad\n");
419      _swrast_print_vertex( ctx, v0 );
420      _swrast_print_vertex( ctx, v1 );
421      _swrast_print_vertex( ctx, v2 );
422      _swrast_print_vertex( ctx, v3 );
423   }
424   SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v3 );
425   SWRAST_CONTEXT(ctx)->Triangle( ctx, v1, v2, v3 );
426}
427
428void
429_swrast_Triangle( GLcontext *ctx, const SWvertex *v0,
430                  const SWvertex *v1, const SWvertex *v2 )
431{
432   if (SWRAST_DEBUG) {
433      _mesa_debug(ctx, "_swrast_Triangle\n");
434      _swrast_print_vertex( ctx, v0 );
435      _swrast_print_vertex( ctx, v1 );
436      _swrast_print_vertex( ctx, v2 );
437   }
438   SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v2 );
439}
440
441void
442_swrast_Line( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1 )
443{
444   if (SWRAST_DEBUG) {
445      _mesa_debug(ctx, "_swrast_Line\n");
446      _swrast_print_vertex( ctx, v0 );
447      _swrast_print_vertex( ctx, v1 );
448   }
449   SWRAST_CONTEXT(ctx)->Line( ctx, v0, v1 );
450}
451
452void
453_swrast_Point( GLcontext *ctx, const SWvertex *v0 )
454{
455   if (SWRAST_DEBUG) {
456      _mesa_debug(ctx, "_swrast_Point\n");
457      _swrast_print_vertex( ctx, v0 );
458   }
459   SWRAST_CONTEXT(ctx)->Point( ctx, v0 );
460}
461
462void
463_swrast_InvalidateState( GLcontext *ctx, GLuint new_state )
464{
465   if (SWRAST_DEBUG) {
466      _mesa_debug(ctx, "_swrast_InvalidateState\n");
467   }
468   SWRAST_CONTEXT(ctx)->InvalidateState( ctx, new_state );
469}
470
471void
472_swrast_ResetLineStipple( GLcontext *ctx )
473{
474   if (SWRAST_DEBUG) {
475      _mesa_debug(ctx, "_swrast_ResetLineStipple\n");
476   }
477   SWRAST_CONTEXT(ctx)->StippleCounter = 0;
478}
479
480void
481_swrast_allow_vertex_fog( GLcontext *ctx, GLboolean value )
482{
483   if (SWRAST_DEBUG) {
484      _mesa_debug(ctx, "_swrast_allow_vertex_fog %d\n", value);
485   }
486   SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT );
487   SWRAST_CONTEXT(ctx)->AllowVertexFog = value;
488}
489
490void
491_swrast_allow_pixel_fog( GLcontext *ctx, GLboolean value )
492{
493   if (SWRAST_DEBUG) {
494      _mesa_debug(ctx, "_swrast_allow_pixel_fog %d\n", value);
495   }
496   SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT );
497   SWRAST_CONTEXT(ctx)->AllowPixelFog = value;
498}
499
500
501GLboolean
502_swrast_CreateContext( GLcontext *ctx )
503{
504   GLuint i;
505   SWcontext *swrast = (SWcontext *)CALLOC(sizeof(SWcontext));
506
507   if (SWRAST_DEBUG) {
508      _mesa_debug(ctx, "_swrast_CreateContext\n");
509   }
510
511   if (!swrast)
512      return GL_FALSE;
513
514   swrast->NewState = ~0;
515
516   swrast->choose_point = _swrast_choose_point;
517   swrast->choose_line = _swrast_choose_line;
518   swrast->choose_triangle = _swrast_choose_triangle;
519
520   swrast->invalidate_point = _SWRAST_NEW_POINT;
521   swrast->invalidate_line = _SWRAST_NEW_LINE;
522   swrast->invalidate_triangle = _SWRAST_NEW_TRIANGLE;
523
524   swrast->Point = _swrast_validate_point;
525   swrast->Line = _swrast_validate_line;
526   swrast->Triangle = _swrast_validate_triangle;
527   swrast->InvalidateState = _swrast_sleep;
528   swrast->BlendFunc = _swrast_validate_blend_func;
529
530   swrast->AllowVertexFog = GL_TRUE;
531   swrast->AllowPixelFog = GL_TRUE;
532
533   if (ctx->Visual.doubleBufferMode)
534      swrast->CurrentBuffer = BACK_LEFT_BIT;
535   else
536      swrast->CurrentBuffer = FRONT_LEFT_BIT;
537
538   /* Optimized Accum buffer */
539   swrast->_IntegerAccumMode = GL_TRUE;
540   swrast->_IntegerAccumScaler = 0.0;
541
542   for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++)
543      swrast->TextureSample[i] = _swrast_validate_texture_sample;
544
545   swrast->SpanArrays = MALLOC_STRUCT(span_arrays);
546   if (!swrast->SpanArrays) {
547      FREE(swrast);
548      return GL_FALSE;
549   }
550
551   /* init point span buffer */
552   swrast->PointSpan.primitive = GL_POINT;
553   swrast->PointSpan.start = 0;
554   swrast->PointSpan.end = 0;
555   swrast->PointSpan.facing = 0;
556   swrast->PointSpan.array = swrast->SpanArrays;
557
558   assert(ctx->Const.MaxTextureUnits > 0);
559   assert(ctx->Const.MaxTextureUnits <= MAX_TEXTURE_UNITS);
560
561   swrast->TexelBuffer = (GLchan *) MALLOC(ctx->Const.MaxTextureUnits *
562                                           MAX_WIDTH * 4 * sizeof(GLchan));
563   if (!swrast->TexelBuffer) {
564      FREE(swrast->SpanArrays);
565      FREE(swrast);
566      return GL_FALSE;
567   }
568
569   ctx->swrast_context = swrast;
570
571   return GL_TRUE;
572}
573
574void
575_swrast_DestroyContext( GLcontext *ctx )
576{
577   SWcontext *swrast = SWRAST_CONTEXT(ctx);
578
579   if (SWRAST_DEBUG) {
580      _mesa_debug(ctx, "_swrast_DestroyContext\n");
581   }
582
583   FREE( swrast->SpanArrays );
584   FREE( swrast->TexelBuffer );
585   FREE( swrast );
586
587   ctx->swrast_context = 0;
588}
589
590
591struct swrast_device_driver *
592_swrast_GetDeviceDriverReference( GLcontext *ctx )
593{
594   SWcontext *swrast = SWRAST_CONTEXT(ctx);
595   return &swrast->Driver;
596}
597
598void
599_swrast_flush( GLcontext *ctx )
600{
601   SWcontext *swrast = SWRAST_CONTEXT(ctx);
602   /* flush any pending fragments from rendering points */
603   if (swrast->PointSpan.end > 0) {
604      if (ctx->Visual.rgbMode) {
605         if (ctx->Texture._EnabledCoordUnits)
606            _swrast_write_texture_span(ctx, &(swrast->PointSpan));
607         else
608            _swrast_write_rgba_span(ctx, &(swrast->PointSpan));
609      }
610      else {
611         _swrast_write_index_span(ctx, &(swrast->PointSpan));
612      }
613      swrast->PointSpan.end = 0;
614   }
615}
616
617void
618_swrast_render_primitive( GLcontext *ctx, GLenum prim )
619{
620   SWcontext *swrast = SWRAST_CONTEXT(ctx);
621   if (swrast->Primitive == GL_POINTS && prim != GL_POINTS) {
622      _swrast_flush(ctx);
623   }
624   swrast->Primitive = prim;
625}
626
627
628void
629_swrast_render_start( GLcontext *ctx )
630{
631   SWcontext *swrast = SWRAST_CONTEXT(ctx);
632   if (swrast->Driver.SpanRenderStart)
633      swrast->Driver.SpanRenderStart( ctx );
634   swrast->PointSpan.end = 0;
635}
636
637void
638_swrast_render_finish( GLcontext *ctx )
639{
640   SWcontext *swrast = SWRAST_CONTEXT(ctx);
641   if (swrast->Driver.SpanRenderFinish)
642      swrast->Driver.SpanRenderFinish( ctx );
643
644   _swrast_flush(ctx);
645}
646
647
648#define SWRAST_DEBUG_VERTICES 0
649
650void
651_swrast_print_vertex( GLcontext *ctx, const SWvertex *v )
652{
653   GLuint i;
654
655   if (SWRAST_DEBUG_VERTICES) {
656      _mesa_debug(ctx, "win %f %f %f %f\n",
657                  v->win[0], v->win[1], v->win[2], v->win[3]);
658
659      for (i = 0 ; i < ctx->Const.MaxTextureUnits ; i++)
660	 if (ctx->Texture.Unit[i]._ReallyEnabled)
661	    _mesa_debug(ctx, "texcoord[%d] %f %f %f %f\n", i,
662                        v->texcoord[i][0], v->texcoord[i][1],
663                        v->texcoord[i][2], v->texcoord[i][3]);
664
665#if CHAN_TYPE == GL_FLOAT
666      _mesa_debug(ctx, "color %f %f %f %f\n",
667                  v->color[0], v->color[1], v->color[2], v->color[3]);
668      _mesa_debug(ctx, "spec %f %f %f %f\n",
669                  v->specular[0], v->specular[1],
670                  v->specular[2], v->specular[3]);
671#else
672      _mesa_debug(ctx, "color %d %d %d %d\n",
673                  v->color[0], v->color[1], v->color[2], v->color[3]);
674      _mesa_debug(ctx, "spec %d %d %d %d\n",
675                  v->specular[0], v->specular[1],
676                  v->specular[2], v->specular[3]);
677#endif
678      _mesa_debug(ctx, "fog %f\n", v->fog);
679      _mesa_debug(ctx, "index %d\n", v->index);
680      _mesa_debug(ctx, "pointsize %f\n", v->pointSize);
681      _mesa_debug(ctx, "\n");
682   }
683}
684