2 * Copyright 2000-2001 VA Linux Systems, Inc.
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * on the rights to use, copy, modify, merge, publish, distribute, sub
9 * license, and/or sell copies of the Software, and to permit persons to whom
10 * the Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
25 * Keith Whitwell <keith@tungstengraphics.com>
27 /* $XFree86: xc/lib/GL/mesa/src/drv/mga/mgatris.c,v 1.10 2002/10/30 12:51:36 alanh Exp $ */
32 #include "swrast/swrast.h"
33 #include "swrast_setup/swrast_setup.h"
34 #include "tnl/t_context.h"
35 #include "tnl/t_pipeline.h"
38 #include "mgacontext.h"
45 static void mgaRenderPrimitive( GLcontext
*ctx
, GLenum prim
);
47 /***********************************************************************
48 * Functions to draw basic primitives *
49 ***********************************************************************/
52 #if defined (USE_X86_ASM)
53 #define EMIT_VERT( j, vb, vertex_size, v ) \
55 __asm__ __volatile__( "rep ; movsl" \
56 : "=%c" (j), "=D" (vb), "=S" (__tmp) \
57 : "0" (vertex_size), \
62 #define EMIT_VERT( j, vb, vertex_size, v ) \
64 for ( j = 0 ; j < vertex_size ; j++ ) \
70 static void INLINE
mga_draw_triangle( mgaContextPtr mmesa
,
75 GLuint vertex_size
= mmesa
->vertex_size
;
76 GLuint
*vb
= mgaAllocDmaLow( mmesa
, 3 * 4 * vertex_size
);
79 EMIT_VERT( j
, vb
, vertex_size
, v0
);
80 EMIT_VERT( j
, vb
, vertex_size
, v1
);
81 EMIT_VERT( j
, vb
, vertex_size
, v2
);
85 static void INLINE
mga_draw_quad( mgaContextPtr mmesa
,
91 GLuint vertex_size
= mmesa
->vertex_size
;
92 GLuint
*vb
= mgaAllocDmaLow( mmesa
, 6 * 4 * vertex_size
);
95 EMIT_VERT( j
, vb
, vertex_size
, v0
);
96 EMIT_VERT( j
, vb
, vertex_size
, v1
);
97 EMIT_VERT( j
, vb
, vertex_size
, v3
);
98 EMIT_VERT( j
, vb
, vertex_size
, v1
);
99 EMIT_VERT( j
, vb
, vertex_size
, v2
);
100 EMIT_VERT( j
, vb
, vertex_size
, v3
);
104 static INLINE
void mga_draw_point( mgaContextPtr mmesa
,
107 const GLfloat sz
= 0.5 * CLAMP(mmesa
->glCtx
->Point
.Size
,
108 mmesa
->glCtx
->Const
.MinPointSize
,
109 mmesa
->glCtx
->Const
.MaxPointSize
);
110 const int vertex_size
= mmesa
->vertex_size
;
111 GLuint
*vb
= mgaAllocDmaLow( mmesa
, 6 * 4 * vertex_size
);
115 v0
->v
.x
+= PNT_X_OFFSET
- TRI_X_OFFSET
;
116 v0
->v
.y
+= PNT_Y_OFFSET
- TRI_Y_OFFSET
;
119 /* Draw a point as two triangles.
121 *(float *)&vb
[0] = tmp
->v
.x
- sz
;
122 *(float *)&vb
[1] = tmp
->v
.y
- sz
;
123 for (j
= 2 ; j
< vertex_size
; j
++)
127 *(float *)&vb
[0] = tmp
->v
.x
+ sz
;
128 *(float *)&vb
[1] = tmp
->v
.y
- sz
;
129 for (j
= 2 ; j
< vertex_size
; j
++)
133 *(float *)&vb
[0] = tmp
->v
.x
+ sz
;
134 *(float *)&vb
[1] = tmp
->v
.y
+ sz
;
135 for (j
= 2 ; j
< vertex_size
; j
++)
139 *(float *)&vb
[0] = tmp
->v
.x
+ sz
;
140 *(float *)&vb
[1] = tmp
->v
.y
+ sz
;
141 for (j
= 2 ; j
< vertex_size
; j
++)
145 *(float *)&vb
[0] = tmp
->v
.x
- sz
;
146 *(float *)&vb
[1] = tmp
->v
.y
+ sz
;
147 for (j
= 2 ; j
< vertex_size
; j
++)
151 *(float *)&vb
[0] = tmp
->v
.x
- sz
;
152 *(float *)&vb
[1] = tmp
->v
.y
- sz
;
153 for (j
= 2 ; j
< vertex_size
; j
++)
157 v0
->v
.x
-= PNT_X_OFFSET
- TRI_X_OFFSET
;
158 v0
->v
.y
-= PNT_Y_OFFSET
- TRI_Y_OFFSET
;
163 static INLINE
void mga_draw_line( mgaContextPtr mmesa
,
167 GLuint vertex_size
= mmesa
->vertex_size
;
168 GLuint
*vb
= mgaAllocDmaLow( mmesa
, 6 * 4 * vertex_size
);
169 GLfloat dx
, dy
, ix
, iy
;
170 const GLfloat width
= CLAMP(mmesa
->glCtx
->Line
.Width
,
171 mmesa
->glCtx
->Const
.MinLineWidth
,
172 mmesa
->glCtx
->Const
.MaxLineWidth
);
176 v0
->v
.x
+= LINE_X_OFFSET
- TRI_X_OFFSET
;
177 v0
->v
.y
+= LINE_Y_OFFSET
- TRI_Y_OFFSET
;
178 v1
->v
.x
+= LINE_X_OFFSET
- TRI_X_OFFSET
;
179 v1
->v
.y
+= LINE_Y_OFFSET
- TRI_Y_OFFSET
;
182 dx
= v0
->v
.x
- v1
->v
.x
;
183 dy
= v0
->v
.y
- v1
->v
.y
;
185 ix
= width
* .5; iy
= 0;
186 if (dx
* dx
> dy
* dy
) {
190 *(float *)&vb
[0] = v0
->v
.x
- ix
;
191 *(float *)&vb
[1] = v0
->v
.y
- iy
;
192 for (j
= 2 ; j
< vertex_size
; j
++)
196 *(float *)&vb
[0] = v1
->v
.x
+ ix
;
197 *(float *)&vb
[1] = v1
->v
.y
+ iy
;
198 for (j
= 2 ; j
< vertex_size
; j
++)
202 *(float *)&vb
[0] = v0
->v
.x
+ ix
;
203 *(float *)&vb
[1] = v0
->v
.y
+ iy
;
204 for (j
= 2 ; j
< vertex_size
; j
++)
208 *(float *)&vb
[0] = v0
->v
.x
- ix
;
209 *(float *)&vb
[1] = v0
->v
.y
- iy
;
210 for (j
= 2 ; j
< vertex_size
; j
++)
214 *(float *)&vb
[0] = v1
->v
.x
- ix
;
215 *(float *)&vb
[1] = v1
->v
.y
- iy
;
216 for (j
= 2 ; j
< vertex_size
; j
++)
220 *(float *)&vb
[0] = v1
->v
.x
+ ix
;
221 *(float *)&vb
[1] = v1
->v
.y
+ iy
;
222 for (j
= 2 ; j
< vertex_size
; j
++)
227 v0
->v
.x
-= LINE_X_OFFSET
- TRI_X_OFFSET
;
228 v0
->v
.y
-= LINE_Y_OFFSET
- TRI_Y_OFFSET
;
229 v1
->v
.x
-= LINE_X_OFFSET
- TRI_X_OFFSET
;
230 v1
->v
.y
-= LINE_Y_OFFSET
- TRI_Y_OFFSET
;
234 /***********************************************************************
235 * Macros for t_dd_tritmp.h to draw basic primitives *
236 ***********************************************************************/
238 #define TRI( a, b, c ) \
241 mmesa->draw_tri( mmesa, a, b, c ); \
243 mga_draw_triangle( mmesa, a, b, c ); \
246 #define QUAD( a, b, c, d ) \
249 mmesa->draw_tri( mmesa, a, b, d ); \
250 mmesa->draw_tri( mmesa, b, c, d ); \
252 mga_draw_quad( mmesa, a, b, c, d ); \
256 #define LINE( v0, v1 ) \
259 mmesa->draw_line( mmesa, v0, v1 ); \
261 mga_draw_line( mmesa, v0, v1 ); \
265 #define POINT( v0 ) \
268 mmesa->draw_point( mmesa, v0 ); \
270 mga_draw_point( mmesa, v0 ); \
275 /***********************************************************************
276 * Fallback to swrast for basic primitives *
277 ***********************************************************************/
279 /* This code is hit only when a mix of accelerated and unaccelerated
280 * primitives are being drawn, and only for the unaccelerated
285 mga_fallback_tri( mgaContextPtr mmesa
,
290 GLcontext
*ctx
= mmesa
->glCtx
;
292 mga_translate_vertex( ctx
, v0
, &v
[0] );
293 mga_translate_vertex( ctx
, v1
, &v
[1] );
294 mga_translate_vertex( ctx
, v2
, &v
[2] );
295 _swrast_Triangle( ctx
, &v
[0], &v
[1], &v
[2] );
300 mga_fallback_line( mgaContextPtr mmesa
,
304 GLcontext
*ctx
= mmesa
->glCtx
;
306 mga_translate_vertex( ctx
, v0
, &v
[0] );
307 mga_translate_vertex( ctx
, v1
, &v
[1] );
308 _swrast_Line( ctx
, &v
[0], &v
[1] );
313 mga_fallback_point( mgaContextPtr mmesa
,
316 GLcontext
*ctx
= mmesa
->glCtx
;
318 mga_translate_vertex( ctx
, v0
, &v
[0] );
319 _swrast_Point( ctx
, &v
[0] );
322 /***********************************************************************
323 * Build render functions from dd templates *
324 ***********************************************************************/
327 #define MGA_UNFILLED_BIT 0x1
328 #define MGA_OFFSET_BIT 0x2
329 #define MGA_TWOSIDE_BIT 0x4
330 #define MGA_FLAT_BIT 0x8 /* mga can't flatshade? */
331 #define MGA_FALLBACK_BIT 0x10
332 #define MGA_MAX_TRIFUNC 0x20
335 tnl_points_func points
;
337 tnl_triangle_func triangle
;
339 } rast_tab
[MGA_MAX_TRIFUNC
];
341 #define DO_FALLBACK (IND & MGA_FALLBACK_BIT)
342 #define DO_OFFSET (IND & MGA_OFFSET_BIT)
343 #define DO_UNFILLED (IND & MGA_UNFILLED_BIT)
344 #define DO_TWOSIDE (IND & MGA_TWOSIDE_BIT)
345 #define DO_FLAT (IND & MGA_FLAT_BIT)
350 #define DO_FULL_QUAD 1
353 #define HAVE_BACK_COLORS 0
355 #define HAVE_HW_FLATSHADE 0
356 #define VERTEX mgaVertex
360 #define DEPTH_SCALE mmesa->depth_scale
361 #define UNFILLED_TRI unfilled_tri
362 #define UNFILLED_QUAD unfilled_quad
363 #define VERT_X(_v) _v->v.x
364 #define VERT_Y(_v) _v->v.y
365 #define VERT_Z(_v) _v->v.z
366 #define AREA_IS_CCW( a ) (a > 0)
367 #define GET_VERTEX(e) (mmesa->verts + (e * mmesa->vertex_size * sizeof(int)))
369 #define VERT_SET_RGBA( v, c ) \
371 mga_color_t *color = (mga_color_t *)&((v)->ui[4]); \
372 UNCLAMPED_FLOAT_TO_UBYTE(color->red, (c)[0]); \
373 UNCLAMPED_FLOAT_TO_UBYTE(color->green, (c)[1]); \
374 UNCLAMPED_FLOAT_TO_UBYTE(color->blue, (c)[2]); \
375 UNCLAMPED_FLOAT_TO_UBYTE(color->alpha, (c)[3]); \
378 #define VERT_COPY_RGBA( v0, v1 ) v0->ui[4] = v1->ui[4]
380 #define VERT_SET_SPEC( v0, c ) \
382 UNCLAMPED_FLOAT_TO_UBYTE(v0->v.specular.red, (c)[0]); \
383 UNCLAMPED_FLOAT_TO_UBYTE(v0->v.specular.green, (c)[1]); \
384 UNCLAMPED_FLOAT_TO_UBYTE(v0->v.specular.blue, (c)[2]); \
387 #define VERT_COPY_SPEC( v0, v1 ) \
389 v0->v.specular.red = v1->v.specular.red; \
390 v0->v.specular.green = v1->v.specular.green; \
391 v0->v.specular.blue = v1->v.specular.blue; \
394 #define VERT_SAVE_RGBA( idx ) color[idx] = v[idx]->ui[4]
395 #define VERT_RESTORE_RGBA( idx ) v[idx]->ui[4] = color[idx]
396 #define VERT_SAVE_SPEC( idx ) spec[idx] = v[idx]->ui[5]
397 #define VERT_RESTORE_SPEC( idx ) v[idx]->ui[5] = spec[idx]
399 #define LOCAL_VARS(n) \
400 mgaContextPtr mmesa = MGA_CONTEXT(ctx); \
401 GLuint color[n], spec[n]; \
402 (void) color; (void) spec;
406 /***********************************************************************
407 * Functions to draw basic unfilled primitives *
408 ***********************************************************************/
410 #define RASTERIZE(x) if (mmesa->raster_primitive != x) \
411 mgaRasterPrimitive( ctx, x, MGA_WA_TRIANGLES )
412 #define RENDER_PRIMITIVE mmesa->render_primitive
413 #define IND MGA_FALLBACK_BIT
415 #include "tnl_dd/t_dd_unfilled.h"
418 /***********************************************************************
419 * Functions to draw GL primitives *
420 ***********************************************************************/
424 #include "tnl_dd/t_dd_tritmp.h"
426 #define IND (MGA_OFFSET_BIT)
427 #define TAG(x) x##_offset
428 #include "tnl_dd/t_dd_tritmp.h"
430 #define IND (MGA_TWOSIDE_BIT)
431 #define TAG(x) x##_twoside
432 #include "tnl_dd/t_dd_tritmp.h"
434 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT)
435 #define TAG(x) x##_twoside_offset
436 #include "tnl_dd/t_dd_tritmp.h"
438 #define IND (MGA_UNFILLED_BIT)
439 #define TAG(x) x##_unfilled
440 #include "tnl_dd/t_dd_tritmp.h"
442 #define IND (MGA_OFFSET_BIT|MGA_UNFILLED_BIT)
443 #define TAG(x) x##_offset_unfilled
444 #include "tnl_dd/t_dd_tritmp.h"
446 #define IND (MGA_TWOSIDE_BIT|MGA_UNFILLED_BIT)
447 #define TAG(x) x##_twoside_unfilled
448 #include "tnl_dd/t_dd_tritmp.h"
450 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_UNFILLED_BIT)
451 #define TAG(x) x##_twoside_offset_unfilled
452 #include "tnl_dd/t_dd_tritmp.h"
454 #define IND (MGA_FALLBACK_BIT)
455 #define TAG(x) x##_fallback
456 #include "tnl_dd/t_dd_tritmp.h"
458 #define IND (MGA_OFFSET_BIT|MGA_FALLBACK_BIT)
459 #define TAG(x) x##_offset_fallback
460 #include "tnl_dd/t_dd_tritmp.h"
462 #define IND (MGA_TWOSIDE_BIT|MGA_FALLBACK_BIT)
463 #define TAG(x) x##_twoside_fallback
464 #include "tnl_dd/t_dd_tritmp.h"
466 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_FALLBACK_BIT)
467 #define TAG(x) x##_twoside_offset_fallback
468 #include "tnl_dd/t_dd_tritmp.h"
470 #define IND (MGA_UNFILLED_BIT|MGA_FALLBACK_BIT)
471 #define TAG(x) x##_unfilled_fallback
472 #include "tnl_dd/t_dd_tritmp.h"
474 #define IND (MGA_OFFSET_BIT|MGA_UNFILLED_BIT|MGA_FALLBACK_BIT)
475 #define TAG(x) x##_offset_unfilled_fallback
476 #include "tnl_dd/t_dd_tritmp.h"
478 #define IND (MGA_TWOSIDE_BIT|MGA_UNFILLED_BIT|MGA_FALLBACK_BIT)
479 #define TAG(x) x##_twoside_unfilled_fallback
480 #include "tnl_dd/t_dd_tritmp.h"
482 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_UNFILLED_BIT| \
484 #define TAG(x) x##_twoside_offset_unfilled_fallback
485 #include "tnl_dd/t_dd_tritmp.h"
488 /* Mga doesn't support provoking-vertex flat-shading?
490 #define IND (MGA_FLAT_BIT)
491 #define TAG(x) x##_flat
492 #include "tnl_dd/t_dd_tritmp.h"
494 #define IND (MGA_OFFSET_BIT|MGA_FLAT_BIT)
495 #define TAG(x) x##_offset_flat
496 #include "tnl_dd/t_dd_tritmp.h"
498 #define IND (MGA_TWOSIDE_BIT|MGA_FLAT_BIT)
499 #define TAG(x) x##_twoside_flat
500 #include "tnl_dd/t_dd_tritmp.h"
502 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_FLAT_BIT)
503 #define TAG(x) x##_twoside_offset_flat
504 #include "tnl_dd/t_dd_tritmp.h"
506 #define IND (MGA_UNFILLED_BIT|MGA_FLAT_BIT)
507 #define TAG(x) x##_unfilled_flat
508 #include "tnl_dd/t_dd_tritmp.h"
510 #define IND (MGA_OFFSET_BIT|MGA_UNFILLED_BIT|MGA_FLAT_BIT)
511 #define TAG(x) x##_offset_unfilled_flat
512 #include "tnl_dd/t_dd_tritmp.h"
514 #define IND (MGA_TWOSIDE_BIT|MGA_UNFILLED_BIT|MGA_FLAT_BIT)
515 #define TAG(x) x##_twoside_unfilled_flat
516 #include "tnl_dd/t_dd_tritmp.h"
518 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_UNFILLED_BIT|MGA_FLAT_BIT)
519 #define TAG(x) x##_twoside_offset_unfilled_flat
520 #include "tnl_dd/t_dd_tritmp.h"
522 #define IND (MGA_FALLBACK_BIT|MGA_FLAT_BIT)
523 #define TAG(x) x##_fallback_flat
524 #include "tnl_dd/t_dd_tritmp.h"
526 #define IND (MGA_OFFSET_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
527 #define TAG(x) x##_offset_fallback_flat
528 #include "tnl_dd/t_dd_tritmp.h"
530 #define IND (MGA_TWOSIDE_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
531 #define TAG(x) x##_twoside_fallback_flat
532 #include "tnl_dd/t_dd_tritmp.h"
534 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
535 #define TAG(x) x##_twoside_offset_fallback_flat
536 #include "tnl_dd/t_dd_tritmp.h"
538 #define IND (MGA_UNFILLED_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
539 #define TAG(x) x##_unfilled_fallback_flat
540 #include "tnl_dd/t_dd_tritmp.h"
542 #define IND (MGA_OFFSET_BIT|MGA_UNFILLED_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
543 #define TAG(x) x##_offset_unfilled_fallback_flat
544 #include "tnl_dd/t_dd_tritmp.h"
546 #define IND (MGA_TWOSIDE_BIT|MGA_UNFILLED_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
547 #define TAG(x) x##_twoside_unfilled_fallback_flat
548 #include "tnl_dd/t_dd_tritmp.h"
550 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_UNFILLED_BIT| \
551 MGA_FALLBACK_BIT|MGA_FLAT_BIT)
552 #define TAG(x) x##_twoside_offset_unfilled_fallback_flat
553 #include "tnl_dd/t_dd_tritmp.h"
556 static void init_rast_tab( void )
561 init_twoside_offset();
563 init_offset_unfilled();
564 init_twoside_unfilled();
565 init_twoside_offset_unfilled();
567 init_offset_fallback();
568 init_twoside_fallback();
569 init_twoside_offset_fallback();
570 init_unfilled_fallback();
571 init_offset_unfilled_fallback();
572 init_twoside_unfilled_fallback();
573 init_twoside_offset_unfilled_fallback();
578 init_twoside_offset_flat();
579 init_unfilled_flat();
580 init_offset_unfilled_flat();
581 init_twoside_unfilled_flat();
582 init_twoside_offset_unfilled_flat();
583 init_fallback_flat();
584 init_offset_fallback_flat();
585 init_twoside_fallback_flat();
586 init_twoside_offset_fallback_flat();
587 init_unfilled_fallback_flat();
588 init_offset_unfilled_fallback_flat();
589 init_twoside_unfilled_fallback_flat();
590 init_twoside_offset_unfilled_fallback_flat();
593 /**********************************************************************/
594 /* Render whole begin/end objects */
595 /**********************************************************************/
598 #define VERT(x) (mgaVertex *)(vertptr + ((x)*vertex_size*sizeof(int)))
599 #define RENDER_POINTS( start, count ) \
600 for ( ; start < count ; start++) \
601 mga_draw_point( mmesa, VERT(ELT(start)) );
602 #define RENDER_LINE( v0, v1 ) \
603 mga_draw_line( mmesa, VERT(v0), VERT(v1) )
604 #define RENDER_TRI( v0, v1, v2 ) \
605 mga_draw_triangle( mmesa, VERT(v0), VERT(v1), VERT(v2) )
606 #define RENDER_QUAD( v0, v1, v2, v3 ) \
607 mga_draw_quad( mmesa, VERT(v0), VERT(v1), VERT(v2), VERT(v3) )
608 #define INIT(x) mgaRenderPrimitive( ctx, x )
611 mgaContextPtr mmesa = MGA_CONTEXT(ctx); \
612 GLubyte *vertptr = (GLubyte *)mmesa->verts; \
613 const GLuint vertex_size = mmesa->vertex_size; \
614 const GLuint * const elt = TNL_CONTEXT(ctx)->vb.Elts; \
616 #define RESET_STIPPLE
617 #define RESET_OCCLUSION
618 #define PRESERVE_VB_DEFS
620 #define TAG(x) mga_##x##_verts
621 #include "tnl/t_vb_rendertmp.h"
624 #define TAG(x) mga_##x##_elts
625 #define ELT(x) elt[x]
626 #include "tnl/t_vb_rendertmp.h"
629 /**********************************************************************/
630 /* Render clipped primitives */
631 /**********************************************************************/
635 static void mgaRenderClippedPoly( GLcontext
*ctx
, const GLuint
*elts
, GLuint n
)
637 mgaContextPtr mmesa
= MGA_CONTEXT(ctx
);
638 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
639 struct vertex_buffer
*VB
= &tnl
->vb
;
640 GLuint prim
= mmesa
->render_primitive
;
642 /* Render the new vertices as an unclipped polygon.
645 GLuint
*tmp
= VB
->Elts
;
646 VB
->Elts
= (GLuint
*)elts
;
647 tnl
->Driver
.Render
.PrimTabElts
[GL_POLYGON
]( ctx
, 0, n
, PRIM_BEGIN
|PRIM_END
);
651 /* Restore the render primitive
653 if (prim
!= GL_POLYGON
)
654 tnl
->Driver
.Render
.PrimitiveNotify( ctx
, prim
);
657 static void mgaRenderClippedLine( GLcontext
*ctx
, GLuint ii
, GLuint jj
)
659 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
660 tnl
->Driver
.Render
.Line( ctx
, ii
, jj
);
663 static void mgaFastRenderClippedPoly( GLcontext
*ctx
, const GLuint
*elts
,
666 mgaContextPtr mmesa
= MGA_CONTEXT( ctx
);
667 GLuint vertex_size
= mmesa
->vertex_size
;
668 GLuint
*vb
= mgaAllocDmaLow( mmesa
, (n
-2) * 3 * 4 * vertex_size
);
669 GLubyte
*vertptr
= (GLubyte
*)mmesa
->verts
;
670 const GLuint
*start
= (const GLuint
*)VERT(elts
[0]);
673 for (i
= 2 ; i
< n
; i
++) {
674 EMIT_VERT( j
, vb
, vertex_size
, (mgaVertexPtr
) VERT(elts
[i
-1]) );
675 EMIT_VERT( j
, vb
, vertex_size
, (mgaVertexPtr
) VERT(elts
[i
]) );
676 EMIT_VERT( j
, vb
, vertex_size
, (mgaVertexPtr
) start
);
680 /**********************************************************************/
681 /* Choose render functions */
682 /**********************************************************************/
685 #define POINT_FALLBACK (DD_POINT_SMOOTH)
686 #define LINE_FALLBACK (DD_LINE_SMOOTH | DD_LINE_STIPPLE)
687 #define TRI_FALLBACK (DD_TRI_SMOOTH | DD_TRI_UNFILLED)
688 #define ANY_FALLBACK_FLAGS (POINT_FALLBACK|LINE_FALLBACK|TRI_FALLBACK)
689 #define ANY_RASTER_FLAGS (DD_FLATSHADE|DD_TRI_LIGHT_TWOSIDE|DD_TRI_OFFSET| \
692 void mgaChooseRenderState(GLcontext
*ctx
)
694 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
695 mgaContextPtr mmesa
= MGA_CONTEXT(ctx
);
696 GLuint flags
= ctx
->_TriangleCaps
;
699 if (flags
& (ANY_FALLBACK_FLAGS
|ANY_RASTER_FLAGS
|DD_TRI_STIPPLE
)) {
700 if (flags
& ANY_RASTER_FLAGS
) {
701 if (flags
& DD_TRI_LIGHT_TWOSIDE
) index
|= MGA_TWOSIDE_BIT
;
702 if (flags
& DD_TRI_OFFSET
) index
|= MGA_OFFSET_BIT
;
703 if (flags
& DD_TRI_UNFILLED
) index
|= MGA_UNFILLED_BIT
;
704 if (flags
& DD_FLATSHADE
) index
|= MGA_FLAT_BIT
;
707 mmesa
->draw_point
= mga_draw_point
;
708 mmesa
->draw_line
= mga_draw_line
;
709 mmesa
->draw_tri
= mga_draw_triangle
;
711 /* Hook in fallbacks for specific primitives.
713 if (flags
& ANY_FALLBACK_FLAGS
)
715 if (flags
& POINT_FALLBACK
)
716 mmesa
->draw_point
= mga_fallback_point
;
718 if (flags
& LINE_FALLBACK
)
719 mmesa
->draw_line
= mga_fallback_line
;
721 if (flags
& TRI_FALLBACK
)
722 mmesa
->draw_tri
= mga_fallback_tri
;
724 index
|= MGA_FALLBACK_BIT
;
727 if ((flags
& DD_TRI_STIPPLE
) && !mmesa
->haveHwStipple
) {
728 mmesa
->draw_tri
= mga_fallback_tri
;
729 index
|= MGA_FALLBACK_BIT
;
733 if (mmesa
->RenderIndex
!= index
) {
734 mmesa
->RenderIndex
= index
;
736 tnl
->Driver
.Render
.Points
= rast_tab
[index
].points
;
737 tnl
->Driver
.Render
.Line
= rast_tab
[index
].line
;
738 tnl
->Driver
.Render
.Triangle
= rast_tab
[index
].triangle
;
739 tnl
->Driver
.Render
.Quad
= rast_tab
[index
].quad
;
742 tnl
->Driver
.Render
.PrimTabVerts
= mga_render_tab_verts
;
743 tnl
->Driver
.Render
.PrimTabElts
= mga_render_tab_elts
;
744 tnl
->Driver
.Render
.ClippedLine
= line
; /* from tritmp.h */
745 tnl
->Driver
.Render
.ClippedPolygon
= mgaFastRenderClippedPoly
;
747 tnl
->Driver
.Render
.PrimTabVerts
= _tnl_render_tab_verts
;
748 tnl
->Driver
.Render
.PrimTabElts
= _tnl_render_tab_elts
;
749 tnl
->Driver
.Render
.ClippedLine
= mgaRenderClippedLine
;
750 tnl
->Driver
.Render
.ClippedPolygon
= mgaRenderClippedPoly
;
755 /**********************************************************************/
756 /* Runtime render state and callbacks */
757 /**********************************************************************/
760 static GLenum reduced_prim
[GL_POLYGON
+1] = {
775 /* Always called between RenderStart and RenderFinish --> We already
778 void mgaRasterPrimitive( GLcontext
*ctx
, GLenum prim
, GLuint hwprim
)
780 mgaContextPtr mmesa
= MGA_CONTEXT( ctx
);
782 FLUSH_BATCH( mmesa
);
785 if (mmesa
->raster_primitive
!= prim
)
786 mmesa
->dirty
|= MGA_UPLOAD_CONTEXT
;
788 mmesa
->raster_primitive
= prim
;
789 /* mmesa->hw_primitive = hwprim; */
790 mmesa
->hw_primitive
= MGA_WA_TRIANGLES
; /* disable mgarender.c for now */
792 if (ctx
->Polygon
.StippleFlag
&& mmesa
->haveHwStipple
)
794 mmesa
->dirty
|= MGA_UPLOAD_CONTEXT
;
795 mmesa
->setup
.dwgctl
&= ~(0xf<<20);
796 if (mmesa
->raster_primitive
== GL_TRIANGLES
)
797 mmesa
->setup
.dwgctl
|= mmesa
->poly_stipple
;
803 /* Determine the rasterized primitive when not drawing unfilled
806 * Used only for the default render stage which always decomposes
807 * primitives to trianges/lines/points. For the accelerated stage,
808 * which renders strips as strips, the equivalent calculations are
809 * performed in mgarender.c.
811 static void mgaRenderPrimitive( GLcontext
*ctx
, GLenum prim
)
813 mgaContextPtr mmesa
= MGA_CONTEXT(ctx
);
814 GLuint rprim
= reduced_prim
[prim
];
816 mmesa
->render_primitive
= prim
;
818 if (rprim
== GL_TRIANGLES
&& (ctx
->_TriangleCaps
& DD_TRI_UNFILLED
))
821 if (mmesa
->raster_primitive
!= rprim
) {
822 mgaRasterPrimitive( ctx
, rprim
, MGA_WA_TRIANGLES
);
826 static void mgaRenderFinish( GLcontext
*ctx
)
828 if (MGA_CONTEXT(ctx
)->RenderIndex
& MGA_FALLBACK_BIT
)
829 _swrast_flush( ctx
);
834 /**********************************************************************/
835 /* Manage total rasterization fallbacks */
836 /**********************************************************************/
838 static const char * const fallbackStrings
[] = {
840 "glDrawBuffer(GL_FRONT_AND_BACK)",
842 "glBlendFunc(GL_SRC_ALPHA_SATURATE, GL_ZERO)",
843 "glRenderMode(selection or feedback)",
844 "No hardware stencil",
845 "glDepthFunc( GL_NEVER )",
846 "Mixing GL_CLAMP_TO_EDGE and GL_CLAMP",
847 "rasterization fallback option"
850 static const char *getFallbackString(GLuint bit
)
857 return fallbackStrings
[i
];
861 void mgaFallback( GLcontext
*ctx
, GLuint bit
, GLboolean mode
)
863 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
864 mgaContextPtr mmesa
= MGA_CONTEXT(ctx
);
865 GLuint oldfallback
= mmesa
->Fallback
;
868 mmesa
->Fallback
|= bit
;
869 if (oldfallback
== 0) {
871 _swsetup_Wakeup( ctx
);
872 mmesa
->RenderIndex
= ~0;
873 if (MGA_DEBUG
& DEBUG_VERBOSE_FALLBACK
) {
874 fprintf(stderr
, "MGA begin rasterization fallback: 0x%x %s\n",
875 bit
, getFallbackString(bit
));
880 mmesa
->Fallback
&= ~bit
;
881 if (oldfallback
== bit
) {
882 _swrast_flush( ctx
);
883 tnl
->Driver
.Render
.Start
= mgaCheckTexSizes
;
884 tnl
->Driver
.Render
.PrimitiveNotify
= mgaRenderPrimitive
;
885 tnl
->Driver
.Render
.Finish
= mgaRenderFinish
;
886 tnl
->Driver
.Render
.BuildVertices
= mgaBuildVertices
;
887 mmesa
->NewGLState
|= (_MGA_NEW_RENDERSTATE
|
888 _MGA_NEW_RASTERSETUP
);
889 if (MGA_DEBUG
& DEBUG_VERBOSE_FALLBACK
) {
890 fprintf(stderr
, "MGA end rasterization fallback: 0x%x %s\n",
891 bit
, getFallbackString(bit
));
898 void mgaDDInitTriFuncs( GLcontext
*ctx
)
900 TNLcontext
*tnl
= TNL_CONTEXT(ctx
);
901 mgaContextPtr mmesa
= MGA_CONTEXT(ctx
);
902 static int firsttime
= 1;
908 mmesa
->RenderIndex
= ~0;
910 tnl
->Driver
.Render
.Start
= mgaCheckTexSizes
;
911 tnl
->Driver
.Render
.Finish
= mgaRenderFinish
;
912 tnl
->Driver
.Render
.PrimitiveNotify
= mgaRenderPrimitive
;
913 tnl
->Driver
.Render
.ResetLineStipple
= _swrast_ResetLineStipple
;
914 tnl
->Driver
.Render
.BuildVertices
= mgaBuildVertices
;
915 tnl
->Driver
.Render
.Multipass
= NULL
;