2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
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:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
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.
25 * Keith Whitwell <keith@tungstengraphics.com>
29 #include "main/imports.h"
30 #include "main/bufferobj.h"
31 #include "main/colormac.h"
32 #include "main/mtypes.h"
33 #include "main/teximage.h"
34 #include "program/prog_parameter.h"
35 #include "program/prog_statevars.h"
38 #include "s_context.h"
42 #include "s_triangle.h"
43 #include "s_texfilter.h"
47 * Recompute the value of swrast->_RasterMask, etc. according to
48 * the current context. The _RasterMask field can be easily tested by
49 * drivers to determine certain basic GL state (does the primitive need
50 * stenciling, logic-op, fog, etc?).
53 _swrast_update_rasterflags( struct gl_context
*ctx
)
55 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
56 GLbitfield rasterMask
= 0;
59 if (ctx
->Color
.AlphaEnabled
) rasterMask
|= ALPHATEST_BIT
;
60 if (ctx
->Color
.BlendEnabled
) rasterMask
|= BLEND_BIT
;
61 if (ctx
->Depth
.Test
) rasterMask
|= DEPTH_BIT
;
62 if (swrast
->_FogEnabled
) rasterMask
|= FOG_BIT
;
63 if (ctx
->Scissor
.Enabled
) rasterMask
|= CLIP_BIT
;
64 if (ctx
->Stencil
._Enabled
) rasterMask
|= STENCIL_BIT
;
65 for (i
= 0; i
< ctx
->Const
.MaxDrawBuffers
; i
++) {
66 if (!ctx
->Color
.ColorMask
[i
][0] ||
67 !ctx
->Color
.ColorMask
[i
][1] ||
68 !ctx
->Color
.ColorMask
[i
][2] ||
69 !ctx
->Color
.ColorMask
[i
][3]) {
70 rasterMask
|= MASKING_BIT
;
74 if (ctx
->Color
._LogicOpEnabled
) rasterMask
|= LOGIC_OP_BIT
;
75 if (ctx
->Texture
._EnabledUnits
) rasterMask
|= TEXTURE_BIT
;
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
;
83 if (ctx
->Query
.CurrentOcclusionObject
)
84 rasterMask
|= OCCLUSION_BIT
;
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.
91 if (ctx
->DrawBuffer
->_NumColorDrawBuffers
!= 1) {
92 /* more than one color buffer designated for writing (or zero buffers) */
93 rasterMask
|= MULTI_DRAW_BIT
;
96 for (i
= 0; i
< ctx
->Const
.MaxDrawBuffers
; i
++) {
97 if (ctx
->Color
.ColorMask
[i
][0] +
98 ctx
->Color
.ColorMask
[i
][1] +
99 ctx
->Color
.ColorMask
[i
][2] +
100 ctx
->Color
.ColorMask
[i
][3] == 0) {
101 rasterMask
|= MULTI_DRAW_BIT
; /* all RGBA channels disabled */
107 if (ctx
->FragmentProgram
._Current
) {
108 rasterMask
|= FRAGPROG_BIT
;
111 if (ctx
->ATIFragmentShader
._Enabled
) {
112 rasterMask
|= ATIFRAGSHADER_BIT
;
115 #if CHAN_TYPE == GL_FLOAT
116 if (ctx
->Color
.ClampFragmentColor
== GL_TRUE
) {
117 rasterMask
|= CLAMPING_BIT
;
121 SWRAST_CONTEXT(ctx
)->_RasterMask
= rasterMask
;
126 * Examine polygon cull state to compute the _BackfaceCullSign field.
127 * _BackfaceCullSign will be 0 if no culling, -1 if culling back-faces,
128 * and 1 if culling front-faces. The Polygon FrontFace state also
132 _swrast_update_polygon( struct gl_context
*ctx
)
134 GLfloat backface_sign
;
136 if (ctx
->Polygon
.CullFlag
) {
137 switch (ctx
->Polygon
.CullFaceMode
) {
139 backface_sign
= -1.0F
;
142 backface_sign
= 1.0F
;
144 case GL_FRONT_AND_BACK
:
147 backface_sign
= 0.0F
;
151 backface_sign
= 0.0F
;
154 SWRAST_CONTEXT(ctx
)->_BackfaceCullSign
= backface_sign
;
156 /* This is for front/back-face determination, but not for culling */
157 SWRAST_CONTEXT(ctx
)->_BackfaceSign
158 = (ctx
->Polygon
.FrontFace
== GL_CW
) ? -1.0F
: 1.0F
;
164 * Update the _PreferPixelFog field to indicate if we need to compute
165 * fog blend factors (from the fog coords) per-fragment.
168 _swrast_update_fog_hint( struct gl_context
*ctx
)
170 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
171 swrast
->_PreferPixelFog
= (!swrast
->AllowVertexFog
||
172 ctx
->FragmentProgram
._Current
||
173 (ctx
->Hint
.Fog
== GL_NICEST
&&
174 swrast
->AllowPixelFog
));
180 * Update the swrast->_TextureCombinePrimary flag.
183 _swrast_update_texture_env( struct gl_context
*ctx
)
185 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
188 swrast
->_TextureCombinePrimary
= GL_FALSE
;
190 for (i
= 0; i
< ctx
->Const
.MaxTextureUnits
; i
++) {
191 const struct gl_tex_env_combine_state
*combine
=
192 ctx
->Texture
.Unit
[i
]._CurrentCombine
;
194 for (term
= 0; term
< combine
->_NumArgsRGB
; term
++) {
195 if (combine
->SourceRGB
[term
] == GL_PRIMARY_COLOR
) {
196 swrast
->_TextureCombinePrimary
= GL_TRUE
;
199 if (combine
->SourceA
[term
] == GL_PRIMARY_COLOR
) {
200 swrast
->_TextureCombinePrimary
= GL_TRUE
;
209 * Determine if we can defer texturing/shading until after Z/stencil
210 * testing. This potentially allows us to skip texturing/shading for
214 _swrast_update_deferred_texture(struct gl_context
*ctx
)
216 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
217 if (ctx
->Color
.AlphaEnabled
) {
218 /* alpha test depends on post-texture/shader colors */
219 swrast
->_DeferredTexture
= GL_FALSE
;
222 const struct gl_fragment_program
*fprog
223 = ctx
->FragmentProgram
._Current
;
224 if (fprog
&& (fprog
->Base
.OutputsWritten
& (1 << FRAG_RESULT_DEPTH
))) {
225 /* Z comes from fragment program/shader */
226 swrast
->_DeferredTexture
= GL_FALSE
;
228 else if (fprog
&& fprog
->UsesKill
) {
229 swrast
->_DeferredTexture
= GL_FALSE
;
231 else if (ctx
->Query
.CurrentOcclusionObject
) {
232 /* occlusion query depends on shader discard/kill results */
233 swrast
->_DeferredTexture
= GL_FALSE
;
236 swrast
->_DeferredTexture
= GL_TRUE
;
243 * Update swrast->_FogColor and swrast->_FogEnable values.
246 _swrast_update_fog_state( struct gl_context
*ctx
)
248 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
249 const struct gl_fragment_program
*fp
= ctx
->FragmentProgram
._Current
;
251 assert((fp
== NULL
) || (fp
->Base
.Target
== GL_FRAGMENT_PROGRAM_ARB
));
253 /* determine if fog is needed, and if so, which fog mode */
254 swrast
->_FogEnabled
= (fp
== NULL
&& ctx
->Fog
.Enabled
);
259 * Update state for running fragment programs. Basically, load the
260 * program parameters with current state values.
263 _swrast_update_fragment_program(struct gl_context
*ctx
, GLbitfield newState
)
265 const struct gl_fragment_program
*fp
= ctx
->FragmentProgram
._Current
;
267 _mesa_load_state_parameters(ctx
, fp
->Base
.Parameters
);
273 * See if we can do early diffuse+specular (primary+secondary) color
274 * add per vertex instead of per-fragment.
277 _swrast_update_specular_vertex_add(struct gl_context
*ctx
)
279 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
280 GLboolean separateSpecular
= ctx
->Fog
.ColorSumEnabled
||
281 (ctx
->Light
.Enabled
&&
282 ctx
->Light
.Model
.ColorControl
== GL_SEPARATE_SPECULAR_COLOR
);
284 swrast
->SpecularVertexAdd
= (separateSpecular
285 && ctx
->Texture
._EnabledUnits
== 0x0
286 && !ctx
->FragmentProgram
._Current
287 && !ctx
->ATIFragmentShader
._Enabled
);
291 #define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK | \
292 _NEW_PROGRAM_CONSTANTS | \
297 /* State referenced by _swrast_choose_triangle, _swrast_choose_line.
299 #define _SWRAST_NEW_TRIANGLE (_SWRAST_NEW_DERIVED | \
306 _SWRAST_NEW_RASTERMASK| \
309 _DD_NEW_SEPARATE_SPECULAR)
311 #define _SWRAST_NEW_LINE (_SWRAST_NEW_DERIVED | \
318 _DD_NEW_SEPARATE_SPECULAR)
320 #define _SWRAST_NEW_POINT (_SWRAST_NEW_DERIVED | \
326 _DD_NEW_SEPARATE_SPECULAR)
328 #define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE
330 #define _SWRAST_NEW_TEXTURE_ENV_MODE _NEW_TEXTURE
332 #define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR
337 * Stub for swrast->Triangle to select a true triangle function
338 * after a state change.
341 _swrast_validate_triangle( struct gl_context
*ctx
,
346 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
348 _swrast_validate_derived( ctx
);
349 swrast
->choose_triangle( ctx
);
350 ASSERT(swrast
->Triangle
);
352 if (swrast
->SpecularVertexAdd
) {
353 /* separate specular color, but no texture */
354 swrast
->SpecTriangle
= swrast
->Triangle
;
355 swrast
->Triangle
= _swrast_add_spec_terms_triangle
;
358 swrast
->Triangle( ctx
, v0
, v1
, v2
);
362 * Called via swrast->Line. Examine current GL state and choose a software
363 * line routine. Then call it.
366 _swrast_validate_line( struct gl_context
*ctx
, const SWvertex
*v0
, const SWvertex
*v1
)
368 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
370 _swrast_validate_derived( ctx
);
371 swrast
->choose_line( ctx
);
372 ASSERT(swrast
->Line
);
374 if (swrast
->SpecularVertexAdd
) {
375 swrast
->SpecLine
= swrast
->Line
;
376 swrast
->Line
= _swrast_add_spec_terms_line
;
379 swrast
->Line( ctx
, v0
, v1
);
383 * Called via swrast->Point. Examine current GL state and choose a software
384 * point routine. Then call it.
387 _swrast_validate_point( struct gl_context
*ctx
, const SWvertex
*v0
)
389 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
391 _swrast_validate_derived( ctx
);
392 swrast
->choose_point( ctx
);
394 if (swrast
->SpecularVertexAdd
) {
395 swrast
->SpecPoint
= swrast
->Point
;
396 swrast
->Point
= _swrast_add_spec_terms_point
;
399 swrast
->Point( ctx
, v0
);
404 * Called via swrast->BlendFunc. Examine GL state to choose a blending
405 * function, then call it.
408 _swrast_validate_blend_func(struct gl_context
*ctx
, GLuint n
, const GLubyte mask
[],
409 GLvoid
*src
, const GLvoid
*dst
,
412 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
414 _swrast_validate_derived( ctx
); /* why is this needed? */
415 _swrast_choose_blend_func( ctx
, chanType
);
417 swrast
->BlendFunc( ctx
, n
, mask
, src
, dst
, chanType
);
421 _swrast_sleep( struct gl_context
*ctx
, GLbitfield new_state
)
423 (void) ctx
; (void) new_state
;
428 _swrast_invalidate_state( struct gl_context
*ctx
, GLbitfield new_state
)
430 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
433 swrast
->NewState
|= new_state
;
435 /* After 10 statechanges without any swrast functions being called,
436 * put the module to sleep.
438 if (++swrast
->StateChanges
> 10) {
439 swrast
->InvalidateState
= _swrast_sleep
;
440 swrast
->NewState
= ~0;
444 if (new_state
& swrast
->InvalidateTriangleMask
)
445 swrast
->Triangle
= _swrast_validate_triangle
;
447 if (new_state
& swrast
->InvalidateLineMask
)
448 swrast
->Line
= _swrast_validate_line
;
450 if (new_state
& swrast
->InvalidatePointMask
)
451 swrast
->Point
= _swrast_validate_point
;
453 if (new_state
& _SWRAST_NEW_BLEND_FUNC
)
454 swrast
->BlendFunc
= _swrast_validate_blend_func
;
456 if (new_state
& _SWRAST_NEW_TEXTURE_SAMPLE_FUNC
)
457 for (i
= 0 ; i
< ctx
->Const
.MaxTextureImageUnits
; i
++)
458 swrast
->TextureSample
[i
] = NULL
;
463 _swrast_update_texture_samplers(struct gl_context
*ctx
)
465 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
469 return; /* pipe hack */
471 for (u
= 0; u
< ctx
->Const
.MaxTextureImageUnits
; u
++) {
472 const struct gl_texture_object
*tObj
= ctx
->Texture
.Unit
[u
]._Current
;
473 /* Note: If tObj is NULL, the sample function will be a simple
474 * function that just returns opaque black (0,0,0,1).
476 swrast
->TextureSample
[u
] = _swrast_choose_texture_sample_func(ctx
, tObj
);
482 * Update swrast->_ActiveAttribs, swrast->_NumActiveAttribs,
483 * swrast->_ActiveAtttribMask.
486 _swrast_update_active_attribs(struct gl_context
*ctx
)
488 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
492 * Compute _ActiveAttribsMask = which fragment attributes are needed.
494 if (ctx
->FragmentProgram
._Current
) {
495 /* fragment program/shader */
496 attribsMask
= ctx
->FragmentProgram
._Current
->Base
.InputsRead
;
497 attribsMask
&= ~FRAG_BIT_WPOS
; /* WPOS is always handled specially */
499 else if (ctx
->ATIFragmentShader
._Enabled
) {
500 attribsMask
= ~0; /* XXX fix me */
506 #if CHAN_TYPE == GL_FLOAT
507 attribsMask
|= FRAG_BIT_COL0
;
510 if (ctx
->Fog
.ColorSumEnabled
||
511 (ctx
->Light
.Enabled
&&
512 ctx
->Light
.Model
.ColorControl
== GL_SEPARATE_SPECULAR_COLOR
)) {
513 attribsMask
|= FRAG_BIT_COL1
;
516 if (swrast
->_FogEnabled
)
517 attribsMask
|= FRAG_BIT_FOGC
;
519 attribsMask
|= (ctx
->Texture
._EnabledUnits
<< FRAG_ATTRIB_TEX0
);
522 swrast
->_ActiveAttribMask
= attribsMask
;
524 /* Update _ActiveAttribs[] list */
527 for (i
= 0; i
< FRAG_ATTRIB_MAX
; i
++) {
528 if (attribsMask
& (1 << i
)) {
529 swrast
->_ActiveAttribs
[num
++] = i
;
530 /* how should this attribute be interpolated? */
531 if (i
== FRAG_ATTRIB_COL0
|| i
== FRAG_ATTRIB_COL1
)
532 swrast
->_InterpMode
[i
] = ctx
->Light
.ShadeModel
;
534 swrast
->_InterpMode
[i
] = GL_SMOOTH
;
537 swrast
->_NumActiveAttribs
= num
;
543 _swrast_validate_derived( struct gl_context
*ctx
)
545 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
547 if (swrast
->NewState
) {
548 if (swrast
->NewState
& _NEW_POLYGON
)
549 _swrast_update_polygon( ctx
);
551 if (swrast
->NewState
& (_NEW_HINT
| _NEW_PROGRAM
))
552 _swrast_update_fog_hint( ctx
);
554 if (swrast
->NewState
& _SWRAST_NEW_TEXTURE_ENV_MODE
)
555 _swrast_update_texture_env( ctx
);
557 if (swrast
->NewState
& (_NEW_FOG
| _NEW_PROGRAM
))
558 _swrast_update_fog_state( ctx
);
560 if (swrast
->NewState
& (_NEW_PROGRAM_CONSTANTS
| _NEW_PROGRAM
))
561 _swrast_update_fragment_program( ctx
, swrast
->NewState
);
563 if (swrast
->NewState
& (_NEW_TEXTURE
| _NEW_PROGRAM
)) {
564 _swrast_update_texture_samplers( ctx
);
567 if (swrast
->NewState
& (_NEW_COLOR
| _NEW_PROGRAM
))
568 _swrast_update_deferred_texture(ctx
);
570 if (swrast
->NewState
& _SWRAST_NEW_RASTERMASK
)
571 _swrast_update_rasterflags( ctx
);
573 if (swrast
->NewState
& (_NEW_DEPTH
|
578 _swrast_update_active_attribs(ctx
);
580 if (swrast
->NewState
& (_NEW_FOG
|
584 _swrast_update_specular_vertex_add(ctx
);
586 swrast
->NewState
= 0;
587 swrast
->StateChanges
= 0;
588 swrast
->InvalidateState
= _swrast_invalidate_state
;
592 #define SWRAST_DEBUG 0
594 /* Public entrypoints: See also s_accum.c, s_bitmap.c, etc.
597 _swrast_Quad( struct gl_context
*ctx
,
598 const SWvertex
*v0
, const SWvertex
*v1
,
599 const SWvertex
*v2
, const SWvertex
*v3
)
602 _mesa_debug(ctx
, "_swrast_Quad\n");
603 _swrast_print_vertex( ctx
, v0
);
604 _swrast_print_vertex( ctx
, v1
);
605 _swrast_print_vertex( ctx
, v2
);
606 _swrast_print_vertex( ctx
, v3
);
608 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v0
, v1
, v3
);
609 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v1
, v2
, v3
);
613 _swrast_Triangle( struct gl_context
*ctx
, const SWvertex
*v0
,
614 const SWvertex
*v1
, const SWvertex
*v2
)
617 _mesa_debug(ctx
, "_swrast_Triangle\n");
618 _swrast_print_vertex( ctx
, v0
);
619 _swrast_print_vertex( ctx
, v1
);
620 _swrast_print_vertex( ctx
, v2
);
622 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v0
, v1
, v2
);
626 _swrast_Line( struct gl_context
*ctx
, const SWvertex
*v0
, const SWvertex
*v1
)
629 _mesa_debug(ctx
, "_swrast_Line\n");
630 _swrast_print_vertex( ctx
, v0
);
631 _swrast_print_vertex( ctx
, v1
);
633 SWRAST_CONTEXT(ctx
)->Line( ctx
, v0
, v1
);
637 _swrast_Point( struct gl_context
*ctx
, const SWvertex
*v0
)
640 _mesa_debug(ctx
, "_swrast_Point\n");
641 _swrast_print_vertex( ctx
, v0
);
643 SWRAST_CONTEXT(ctx
)->Point( ctx
, v0
);
647 _swrast_InvalidateState( struct gl_context
*ctx
, GLbitfield new_state
)
650 _mesa_debug(ctx
, "_swrast_InvalidateState\n");
652 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, new_state
);
656 _swrast_ResetLineStipple( struct gl_context
*ctx
)
659 _mesa_debug(ctx
, "_swrast_ResetLineStipple\n");
661 SWRAST_CONTEXT(ctx
)->StippleCounter
= 0;
665 _swrast_SetFacing(struct gl_context
*ctx
, GLuint facing
)
667 SWRAST_CONTEXT(ctx
)->PointLineFacing
= facing
;
671 _swrast_allow_vertex_fog( struct gl_context
*ctx
, GLboolean value
)
674 _mesa_debug(ctx
, "_swrast_allow_vertex_fog %d\n", value
);
676 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, _NEW_HINT
);
677 SWRAST_CONTEXT(ctx
)->AllowVertexFog
= value
;
681 _swrast_allow_pixel_fog( struct gl_context
*ctx
, GLboolean value
)
684 _mesa_debug(ctx
, "_swrast_allow_pixel_fog %d\n", value
);
686 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, _NEW_HINT
);
687 SWRAST_CONTEXT(ctx
)->AllowPixelFog
= value
;
692 _swrast_CreateContext( struct gl_context
*ctx
)
695 SWcontext
*swrast
= (SWcontext
*)CALLOC(sizeof(SWcontext
));
697 const GLint maxThreads
= omp_get_max_threads();
699 const GLint maxThreads
= 1;
703 _mesa_debug(ctx
, "_swrast_CreateContext\n");
709 swrast
->NewState
= ~0;
711 swrast
->choose_point
= _swrast_choose_point
;
712 swrast
->choose_line
= _swrast_choose_line
;
713 swrast
->choose_triangle
= _swrast_choose_triangle
;
715 swrast
->InvalidatePointMask
= _SWRAST_NEW_POINT
;
716 swrast
->InvalidateLineMask
= _SWRAST_NEW_LINE
;
717 swrast
->InvalidateTriangleMask
= _SWRAST_NEW_TRIANGLE
;
719 swrast
->Point
= _swrast_validate_point
;
720 swrast
->Line
= _swrast_validate_line
;
721 swrast
->Triangle
= _swrast_validate_triangle
;
722 swrast
->InvalidateState
= _swrast_sleep
;
723 swrast
->BlendFunc
= _swrast_validate_blend_func
;
725 swrast
->AllowVertexFog
= GL_TRUE
;
726 swrast
->AllowPixelFog
= GL_TRUE
;
728 /* Optimized Accum buffer */
729 swrast
->_IntegerAccumMode
= GL_FALSE
;
730 swrast
->_IntegerAccumScaler
= 0.0;
732 for (i
= 0; i
< MAX_TEXTURE_IMAGE_UNITS
; i
++)
733 swrast
->TextureSample
[i
] = NULL
;
735 /* SpanArrays is global and shared by all SWspan instances. However, when
736 * using multiple threads, it is necessary to have one SpanArrays instance
739 swrast
->SpanArrays
= (SWspanarrays
*) MALLOC(maxThreads
* sizeof(SWspanarrays
));
740 if (!swrast
->SpanArrays
) {
744 for(i
= 0; i
< maxThreads
; i
++) {
745 swrast
->SpanArrays
[i
].ChanType
= CHAN_TYPE
;
746 #if CHAN_TYPE == GL_UNSIGNED_BYTE
747 swrast
->SpanArrays
[i
].rgba
= swrast
->SpanArrays
[i
].rgba8
;
748 #elif CHAN_TYPE == GL_UNSIGNED_SHORT
749 swrast
->SpanArrays
[i
].rgba
= swrast
->SpanArrays
[i
].rgba16
;
751 swrast
->SpanArrays
[i
].rgba
= swrast
->SpanArrays
[i
].attribs
[FRAG_ATTRIB_COL0
];
755 /* init point span buffer */
756 swrast
->PointSpan
.primitive
= GL_POINT
;
757 swrast
->PointSpan
.end
= 0;
758 swrast
->PointSpan
.facing
= 0;
759 swrast
->PointSpan
.array
= swrast
->SpanArrays
;
761 /* TexelBuffer is also global and normally shared by all SWspan instances;
762 * when running with multiple threads, create one per thread.
764 swrast
->TexelBuffer
= (GLfloat
*) MALLOC(ctx
->Const
.MaxTextureImageUnits
* maxThreads
*
765 MAX_WIDTH
* 4 * sizeof(GLfloat
));
766 if (!swrast
->TexelBuffer
) {
767 FREE(swrast
->SpanArrays
);
772 ctx
->swrast_context
= swrast
;
778 _swrast_DestroyContext( struct gl_context
*ctx
)
780 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
783 _mesa_debug(ctx
, "_swrast_DestroyContext\n");
786 FREE( swrast
->SpanArrays
);
787 if (swrast
->ZoomedArrays
)
788 FREE( swrast
->ZoomedArrays
);
789 FREE( swrast
->TexelBuffer
);
792 ctx
->swrast_context
= 0;
796 struct swrast_device_driver
*
797 _swrast_GetDeviceDriverReference( struct gl_context
*ctx
)
799 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
800 return &swrast
->Driver
;
804 _swrast_flush( struct gl_context
*ctx
)
806 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
807 /* flush any pending fragments from rendering points */
808 if (swrast
->PointSpan
.end
> 0) {
809 _swrast_write_rgba_span(ctx
, &(swrast
->PointSpan
));
810 swrast
->PointSpan
.end
= 0;
815 _swrast_render_primitive( struct gl_context
*ctx
, GLenum prim
)
817 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
818 if (swrast
->Primitive
== GL_POINTS
&& prim
!= GL_POINTS
) {
821 swrast
->Primitive
= prim
;
826 _swrast_render_start( struct gl_context
*ctx
)
828 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
829 if (swrast
->Driver
.SpanRenderStart
)
830 swrast
->Driver
.SpanRenderStart( ctx
);
831 swrast
->PointSpan
.end
= 0;
835 _swrast_render_finish( struct gl_context
*ctx
)
837 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
838 if (swrast
->Driver
.SpanRenderFinish
)
839 swrast
->Driver
.SpanRenderFinish( ctx
);
845 #define SWRAST_DEBUG_VERTICES 0
848 _swrast_print_vertex( struct gl_context
*ctx
, const SWvertex
*v
)
852 if (SWRAST_DEBUG_VERTICES
) {
853 _mesa_debug(ctx
, "win %f %f %f %f\n",
854 v
->attrib
[FRAG_ATTRIB_WPOS
][0],
855 v
->attrib
[FRAG_ATTRIB_WPOS
][1],
856 v
->attrib
[FRAG_ATTRIB_WPOS
][2],
857 v
->attrib
[FRAG_ATTRIB_WPOS
][3]);
859 for (i
= 0 ; i
< ctx
->Const
.MaxTextureCoordUnits
; i
++)
860 if (ctx
->Texture
.Unit
[i
]._ReallyEnabled
)
861 _mesa_debug(ctx
, "texcoord[%d] %f %f %f %f\n", i
,
862 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][0],
863 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][1],
864 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][2],
865 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][3]);
867 #if CHAN_TYPE == GL_FLOAT
868 _mesa_debug(ctx
, "color %f %f %f %f\n",
869 v
->color
[0], v
->color
[1], v
->color
[2], v
->color
[3]);
871 _mesa_debug(ctx
, "color %d %d %d %d\n",
872 v
->color
[0], v
->color
[1], v
->color
[2], v
->color
[3]);
874 _mesa_debug(ctx
, "spec %g %g %g %g\n",
875 v
->attrib
[FRAG_ATTRIB_COL1
][0],
876 v
->attrib
[FRAG_ATTRIB_COL1
][1],
877 v
->attrib
[FRAG_ATTRIB_COL1
][2],
878 v
->attrib
[FRAG_ATTRIB_COL1
][3]);
879 _mesa_debug(ctx
, "fog %f\n", v
->attrib
[FRAG_ATTRIB_FOGC
][0]);
880 _mesa_debug(ctx
, "index %f\n", v
->attrib
[FRAG_ATTRIB_CI
][0]);
881 _mesa_debug(ctx
, "pointsize %f\n", v
->pointSize
);
882 _mesa_debug(ctx
, "\n");