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_texfetch.h"
43 #include "s_triangle.h"
44 #include "s_texfilter.h"
48 * Recompute the value of swrast->_RasterMask, etc. according to
49 * the current context. The _RasterMask field can be easily tested by
50 * drivers to determine certain basic GL state (does the primitive need
51 * stenciling, logic-op, fog, etc?).
54 _swrast_update_rasterflags( struct gl_context
*ctx
)
56 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
57 GLbitfield rasterMask
= 0;
60 if (ctx
->Color
.AlphaEnabled
) rasterMask
|= ALPHATEST_BIT
;
61 if (ctx
->Color
.BlendEnabled
) rasterMask
|= BLEND_BIT
;
62 if (ctx
->Depth
.Test
) rasterMask
|= DEPTH_BIT
;
63 if (swrast
->_FogEnabled
) rasterMask
|= FOG_BIT
;
64 if (ctx
->Scissor
.Enabled
) rasterMask
|= CLIP_BIT
;
65 if (ctx
->Stencil
._Enabled
) rasterMask
|= STENCIL_BIT
;
66 for (i
= 0; i
< ctx
->Const
.MaxDrawBuffers
; i
++) {
67 if (!ctx
->Color
.ColorMask
[i
][0] ||
68 !ctx
->Color
.ColorMask
[i
][1] ||
69 !ctx
->Color
.ColorMask
[i
][2] ||
70 !ctx
->Color
.ColorMask
[i
][3]) {
71 rasterMask
|= MASKING_BIT
;
75 if (ctx
->Color
.ColorLogicOpEnabled
) rasterMask
|= LOGIC_OP_BIT
;
76 if (ctx
->Texture
._EnabledUnits
) rasterMask
|= TEXTURE_BIT
;
77 if ( ctx
->Viewport
.X
< 0
78 || ctx
->Viewport
.X
+ ctx
->Viewport
.Width
> (GLint
) ctx
->DrawBuffer
->Width
79 || ctx
->Viewport
.Y
< 0
80 || ctx
->Viewport
.Y
+ ctx
->Viewport
.Height
> (GLint
) ctx
->DrawBuffer
->Height
) {
81 rasterMask
|= CLIP_BIT
;
84 if (ctx
->Query
.CurrentOcclusionObject
)
85 rasterMask
|= OCCLUSION_BIT
;
88 /* If we're not drawing to exactly one color buffer set the
89 * MULTI_DRAW_BIT flag. Also set it if we're drawing to no
90 * buffers or the RGBA or CI mask disables all writes.
92 if (ctx
->DrawBuffer
->_NumColorDrawBuffers
!= 1) {
93 /* more than one color buffer designated for writing (or zero buffers) */
94 rasterMask
|= MULTI_DRAW_BIT
;
97 for (i
= 0; i
< ctx
->Const
.MaxDrawBuffers
; i
++) {
98 if (ctx
->Color
.ColorMask
[i
][0] +
99 ctx
->Color
.ColorMask
[i
][1] +
100 ctx
->Color
.ColorMask
[i
][2] +
101 ctx
->Color
.ColorMask
[i
][3] == 0) {
102 rasterMask
|= MULTI_DRAW_BIT
; /* all RGBA channels disabled */
108 if (ctx
->FragmentProgram
._Current
) {
109 rasterMask
|= FRAGPROG_BIT
;
112 if (ctx
->ATIFragmentShader
._Enabled
) {
113 rasterMask
|= ATIFRAGSHADER_BIT
;
116 #if CHAN_TYPE == GL_FLOAT
117 if (ctx
->Color
.ClampFragmentColor
== GL_TRUE
) {
118 rasterMask
|= CLAMPING_BIT
;
122 SWRAST_CONTEXT(ctx
)->_RasterMask
= rasterMask
;
127 * Examine polygon cull state to compute the _BackfaceCullSign field.
128 * _BackfaceCullSign will be 0 if no culling, -1 if culling back-faces,
129 * and 1 if culling front-faces. The Polygon FrontFace state also
133 _swrast_update_polygon( struct gl_context
*ctx
)
135 GLfloat backface_sign
;
137 if (ctx
->Polygon
.CullFlag
) {
138 switch (ctx
->Polygon
.CullFaceMode
) {
140 backface_sign
= -1.0F
;
143 backface_sign
= 1.0F
;
145 case GL_FRONT_AND_BACK
:
148 backface_sign
= 0.0F
;
152 backface_sign
= 0.0F
;
155 SWRAST_CONTEXT(ctx
)->_BackfaceCullSign
= backface_sign
;
157 /* This is for front/back-face determination, but not for culling */
158 SWRAST_CONTEXT(ctx
)->_BackfaceSign
159 = (ctx
->Polygon
.FrontFace
== GL_CW
) ? -1.0F
: 1.0F
;
165 * Update the _PreferPixelFog field to indicate if we need to compute
166 * fog blend factors (from the fog coords) per-fragment.
169 _swrast_update_fog_hint( struct gl_context
*ctx
)
171 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
172 swrast
->_PreferPixelFog
= (!swrast
->AllowVertexFog
||
173 ctx
->FragmentProgram
._Current
||
174 (ctx
->Hint
.Fog
== GL_NICEST
&&
175 swrast
->AllowPixelFog
));
181 * Update the swrast->_TextureCombinePrimary flag.
184 _swrast_update_texture_env( struct gl_context
*ctx
)
186 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
189 swrast
->_TextureCombinePrimary
= GL_FALSE
;
191 for (i
= 0; i
< ctx
->Const
.MaxTextureUnits
; i
++) {
192 const struct gl_tex_env_combine_state
*combine
=
193 ctx
->Texture
.Unit
[i
]._CurrentCombine
;
195 for (term
= 0; term
< combine
->_NumArgsRGB
; term
++) {
196 if (combine
->SourceRGB
[term
] == GL_PRIMARY_COLOR
) {
197 swrast
->_TextureCombinePrimary
= GL_TRUE
;
200 if (combine
->SourceA
[term
] == GL_PRIMARY_COLOR
) {
201 swrast
->_TextureCombinePrimary
= GL_TRUE
;
210 * Determine if we can defer texturing/shading until after Z/stencil
211 * testing. This potentially allows us to skip texturing/shading for
215 _swrast_update_deferred_texture(struct gl_context
*ctx
)
217 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
218 if (ctx
->Color
.AlphaEnabled
) {
219 /* alpha test depends on post-texture/shader colors */
220 swrast
->_DeferredTexture
= GL_FALSE
;
223 const struct gl_fragment_program
*fprog
224 = ctx
->FragmentProgram
._Current
;
225 if (fprog
&& (fprog
->Base
.OutputsWritten
& (1 << FRAG_RESULT_DEPTH
))) {
226 /* Z comes from fragment program/shader */
227 swrast
->_DeferredTexture
= GL_FALSE
;
229 else if (fprog
&& fprog
->UsesKill
) {
230 swrast
->_DeferredTexture
= GL_FALSE
;
232 else if (ctx
->Query
.CurrentOcclusionObject
) {
233 /* occlusion query depends on shader discard/kill results */
234 swrast
->_DeferredTexture
= GL_FALSE
;
237 swrast
->_DeferredTexture
= GL_TRUE
;
244 * Update swrast->_FogColor and swrast->_FogEnable values.
247 _swrast_update_fog_state( struct gl_context
*ctx
)
249 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
250 const struct gl_fragment_program
*fp
= ctx
->FragmentProgram
._Current
;
252 assert((fp
== NULL
) || (fp
->Base
.Target
== GL_FRAGMENT_PROGRAM_ARB
));
254 /* determine if fog is needed, and if so, which fog mode */
255 swrast
->_FogEnabled
= (fp
== NULL
&& ctx
->Fog
.Enabled
);
260 * Update state for running fragment programs. Basically, load the
261 * program parameters with current state values.
264 _swrast_update_fragment_program(struct gl_context
*ctx
, GLbitfield newState
)
266 const struct gl_fragment_program
*fp
= ctx
->FragmentProgram
._Current
;
268 _mesa_load_state_parameters(ctx
, fp
->Base
.Parameters
);
274 * See if we can do early diffuse+specular (primary+secondary) color
275 * add per vertex instead of per-fragment.
278 _swrast_update_specular_vertex_add(struct gl_context
*ctx
)
280 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
281 GLboolean separateSpecular
= ctx
->Fog
.ColorSumEnabled
||
282 (ctx
->Light
.Enabled
&&
283 ctx
->Light
.Model
.ColorControl
== GL_SEPARATE_SPECULAR_COLOR
);
285 swrast
->SpecularVertexAdd
= (separateSpecular
286 && ctx
->Texture
._EnabledUnits
== 0x0
287 && !ctx
->FragmentProgram
._Current
288 && !ctx
->ATIFragmentShader
._Enabled
);
292 #define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK | \
293 _NEW_PROGRAM_CONSTANTS | \
298 /* State referenced by _swrast_choose_triangle, _swrast_choose_line.
300 #define _SWRAST_NEW_TRIANGLE (_SWRAST_NEW_DERIVED | \
307 _SWRAST_NEW_RASTERMASK| \
310 _DD_NEW_SEPARATE_SPECULAR)
312 #define _SWRAST_NEW_LINE (_SWRAST_NEW_DERIVED | \
319 _DD_NEW_SEPARATE_SPECULAR)
321 #define _SWRAST_NEW_POINT (_SWRAST_NEW_DERIVED | \
327 _DD_NEW_SEPARATE_SPECULAR)
329 #define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE
331 #define _SWRAST_NEW_TEXTURE_ENV_MODE _NEW_TEXTURE
333 #define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR
338 * Stub for swrast->Triangle to select a true triangle function
339 * after a state change.
342 _swrast_validate_triangle( struct gl_context
*ctx
,
347 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
349 _swrast_validate_derived( ctx
);
350 swrast
->choose_triangle( ctx
);
351 ASSERT(swrast
->Triangle
);
353 if (swrast
->SpecularVertexAdd
) {
354 /* separate specular color, but no texture */
355 swrast
->SpecTriangle
= swrast
->Triangle
;
356 swrast
->Triangle
= _swrast_add_spec_terms_triangle
;
359 swrast
->Triangle( ctx
, v0
, v1
, v2
);
363 * Called via swrast->Line. Examine current GL state and choose a software
364 * line routine. Then call it.
367 _swrast_validate_line( struct gl_context
*ctx
, const SWvertex
*v0
, const SWvertex
*v1
)
369 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
371 _swrast_validate_derived( ctx
);
372 swrast
->choose_line( ctx
);
373 ASSERT(swrast
->Line
);
375 if (swrast
->SpecularVertexAdd
) {
376 swrast
->SpecLine
= swrast
->Line
;
377 swrast
->Line
= _swrast_add_spec_terms_line
;
380 swrast
->Line( ctx
, v0
, v1
);
384 * Called via swrast->Point. Examine current GL state and choose a software
385 * point routine. Then call it.
388 _swrast_validate_point( struct gl_context
*ctx
, const SWvertex
*v0
)
390 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
392 _swrast_validate_derived( ctx
);
393 swrast
->choose_point( ctx
);
395 if (swrast
->SpecularVertexAdd
) {
396 swrast
->SpecPoint
= swrast
->Point
;
397 swrast
->Point
= _swrast_add_spec_terms_point
;
400 swrast
->Point( ctx
, v0
);
405 * Called via swrast->BlendFunc. Examine GL state to choose a blending
406 * function, then call it.
409 _swrast_validate_blend_func(struct gl_context
*ctx
, GLuint n
, const GLubyte mask
[],
410 GLvoid
*src
, const GLvoid
*dst
,
413 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
415 _swrast_validate_derived( ctx
); /* why is this needed? */
416 _swrast_choose_blend_func( ctx
, chanType
);
418 swrast
->BlendFunc( ctx
, n
, mask
, src
, dst
, chanType
);
422 _swrast_sleep( struct gl_context
*ctx
, GLbitfield new_state
)
424 (void) ctx
; (void) new_state
;
429 _swrast_invalidate_state( struct gl_context
*ctx
, GLbitfield new_state
)
431 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
434 swrast
->NewState
|= new_state
;
436 /* After 10 statechanges without any swrast functions being called,
437 * put the module to sleep.
439 if (++swrast
->StateChanges
> 10) {
440 swrast
->InvalidateState
= _swrast_sleep
;
441 swrast
->NewState
= ~0;
445 if (new_state
& swrast
->InvalidateTriangleMask
)
446 swrast
->Triangle
= _swrast_validate_triangle
;
448 if (new_state
& swrast
->InvalidateLineMask
)
449 swrast
->Line
= _swrast_validate_line
;
451 if (new_state
& swrast
->InvalidatePointMask
)
452 swrast
->Point
= _swrast_validate_point
;
454 if (new_state
& _SWRAST_NEW_BLEND_FUNC
)
455 swrast
->BlendFunc
= _swrast_validate_blend_func
;
457 if (new_state
& _SWRAST_NEW_TEXTURE_SAMPLE_FUNC
)
458 for (i
= 0 ; i
< ctx
->Const
.MaxTextureImageUnits
; i
++)
459 swrast
->TextureSample
[i
] = NULL
;
464 _swrast_update_texture_samplers(struct gl_context
*ctx
)
466 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
470 return; /* pipe hack */
472 for (u
= 0; u
< ctx
->Const
.MaxTextureImageUnits
; u
++) {
473 struct gl_texture_object
*tObj
= ctx
->Texture
.Unit
[u
]._Current
;
474 /* Note: If tObj is NULL, the sample function will be a simple
475 * function that just returns opaque black (0,0,0,1).
478 _mesa_update_fetch_functions(tObj
);
479 swrast
->TextureSample
[u
] = _swrast_choose_texture_sample_func(ctx
, tObj
);
486 * Update swrast->_ActiveAttribs, swrast->_NumActiveAttribs,
487 * swrast->_ActiveAtttribMask.
490 _swrast_update_active_attribs(struct gl_context
*ctx
)
492 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
496 * Compute _ActiveAttribsMask = which fragment attributes are needed.
498 if (ctx
->FragmentProgram
._Current
) {
499 /* fragment program/shader */
500 attribsMask
= ctx
->FragmentProgram
._Current
->Base
.InputsRead
;
501 attribsMask
&= ~FRAG_BIT_WPOS
; /* WPOS is always handled specially */
503 else if (ctx
->ATIFragmentShader
._Enabled
) {
504 attribsMask
= ~0; /* XXX fix me */
510 #if CHAN_TYPE == GL_FLOAT
511 attribsMask
|= FRAG_BIT_COL0
;
514 if (ctx
->Fog
.ColorSumEnabled
||
515 (ctx
->Light
.Enabled
&&
516 ctx
->Light
.Model
.ColorControl
== GL_SEPARATE_SPECULAR_COLOR
)) {
517 attribsMask
|= FRAG_BIT_COL1
;
520 if (swrast
->_FogEnabled
)
521 attribsMask
|= FRAG_BIT_FOGC
;
523 attribsMask
|= (ctx
->Texture
._EnabledUnits
<< FRAG_ATTRIB_TEX0
);
526 swrast
->_ActiveAttribMask
= attribsMask
;
528 /* Update _ActiveAttribs[] list */
531 for (i
= 0; i
< FRAG_ATTRIB_MAX
; i
++) {
532 if (attribsMask
& (1 << i
)) {
533 swrast
->_ActiveAttribs
[num
++] = i
;
534 /* how should this attribute be interpolated? */
535 if (i
== FRAG_ATTRIB_COL0
|| i
== FRAG_ATTRIB_COL1
)
536 swrast
->_InterpMode
[i
] = ctx
->Light
.ShadeModel
;
538 swrast
->_InterpMode
[i
] = GL_SMOOTH
;
541 swrast
->_NumActiveAttribs
= num
;
547 _swrast_validate_derived( struct gl_context
*ctx
)
549 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
551 if (swrast
->NewState
) {
552 if (swrast
->NewState
& _NEW_POLYGON
)
553 _swrast_update_polygon( ctx
);
555 if (swrast
->NewState
& (_NEW_HINT
| _NEW_PROGRAM
))
556 _swrast_update_fog_hint( ctx
);
558 if (swrast
->NewState
& _SWRAST_NEW_TEXTURE_ENV_MODE
)
559 _swrast_update_texture_env( ctx
);
561 if (swrast
->NewState
& (_NEW_FOG
| _NEW_PROGRAM
))
562 _swrast_update_fog_state( ctx
);
564 if (swrast
->NewState
& (_NEW_PROGRAM_CONSTANTS
| _NEW_PROGRAM
))
565 _swrast_update_fragment_program( ctx
, swrast
->NewState
);
567 if (swrast
->NewState
& (_NEW_TEXTURE
| _NEW_PROGRAM
)) {
568 _swrast_update_texture_samplers( ctx
);
571 if (swrast
->NewState
& (_NEW_COLOR
| _NEW_PROGRAM
))
572 _swrast_update_deferred_texture(ctx
);
574 if (swrast
->NewState
& _SWRAST_NEW_RASTERMASK
)
575 _swrast_update_rasterflags( ctx
);
577 if (swrast
->NewState
& (_NEW_DEPTH
|
582 _swrast_update_active_attribs(ctx
);
584 if (swrast
->NewState
& (_NEW_FOG
|
588 _swrast_update_specular_vertex_add(ctx
);
590 swrast
->NewState
= 0;
591 swrast
->StateChanges
= 0;
592 swrast
->InvalidateState
= _swrast_invalidate_state
;
596 #define SWRAST_DEBUG 0
598 /* Public entrypoints: See also s_accum.c, s_bitmap.c, etc.
601 _swrast_Quad( struct gl_context
*ctx
,
602 const SWvertex
*v0
, const SWvertex
*v1
,
603 const SWvertex
*v2
, const SWvertex
*v3
)
606 _mesa_debug(ctx
, "_swrast_Quad\n");
607 _swrast_print_vertex( ctx
, v0
);
608 _swrast_print_vertex( ctx
, v1
);
609 _swrast_print_vertex( ctx
, v2
);
610 _swrast_print_vertex( ctx
, v3
);
612 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v0
, v1
, v3
);
613 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v1
, v2
, v3
);
617 _swrast_Triangle( struct gl_context
*ctx
, const SWvertex
*v0
,
618 const SWvertex
*v1
, const SWvertex
*v2
)
621 _mesa_debug(ctx
, "_swrast_Triangle\n");
622 _swrast_print_vertex( ctx
, v0
);
623 _swrast_print_vertex( ctx
, v1
);
624 _swrast_print_vertex( ctx
, v2
);
626 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v0
, v1
, v2
);
630 _swrast_Line( struct gl_context
*ctx
, const SWvertex
*v0
, const SWvertex
*v1
)
633 _mesa_debug(ctx
, "_swrast_Line\n");
634 _swrast_print_vertex( ctx
, v0
);
635 _swrast_print_vertex( ctx
, v1
);
637 SWRAST_CONTEXT(ctx
)->Line( ctx
, v0
, v1
);
641 _swrast_Point( struct gl_context
*ctx
, const SWvertex
*v0
)
644 _mesa_debug(ctx
, "_swrast_Point\n");
645 _swrast_print_vertex( ctx
, v0
);
647 SWRAST_CONTEXT(ctx
)->Point( ctx
, v0
);
651 _swrast_InvalidateState( struct gl_context
*ctx
, GLbitfield new_state
)
654 _mesa_debug(ctx
, "_swrast_InvalidateState\n");
656 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, new_state
);
660 _swrast_ResetLineStipple( struct gl_context
*ctx
)
663 _mesa_debug(ctx
, "_swrast_ResetLineStipple\n");
665 SWRAST_CONTEXT(ctx
)->StippleCounter
= 0;
669 _swrast_SetFacing(struct gl_context
*ctx
, GLuint facing
)
671 SWRAST_CONTEXT(ctx
)->PointLineFacing
= facing
;
675 _swrast_allow_vertex_fog( struct gl_context
*ctx
, GLboolean value
)
678 _mesa_debug(ctx
, "_swrast_allow_vertex_fog %d\n", value
);
680 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, _NEW_HINT
);
681 SWRAST_CONTEXT(ctx
)->AllowVertexFog
= value
;
685 _swrast_allow_pixel_fog( struct gl_context
*ctx
, GLboolean value
)
688 _mesa_debug(ctx
, "_swrast_allow_pixel_fog %d\n", value
);
690 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, _NEW_HINT
);
691 SWRAST_CONTEXT(ctx
)->AllowPixelFog
= value
;
696 * Initialize native program limits by copying the logical limits.
697 * See comments in init_program_limits() in context.c
700 init_program_native_limits(struct gl_program_constants
*prog
)
702 prog
->MaxNativeInstructions
= prog
->MaxInstructions
;
703 prog
->MaxNativeAluInstructions
= prog
->MaxAluInstructions
;
704 prog
->MaxNativeTexInstructions
= prog
->MaxTexInstructions
;
705 prog
->MaxNativeTexIndirections
= prog
->MaxTexIndirections
;
706 prog
->MaxNativeAttribs
= prog
->MaxAttribs
;
707 prog
->MaxNativeTemps
= prog
->MaxTemps
;
708 prog
->MaxNativeAddressRegs
= prog
->MaxAddressRegs
;
709 prog
->MaxNativeParameters
= prog
->MaxParameters
;
714 _swrast_CreateContext( struct gl_context
*ctx
)
717 SWcontext
*swrast
= (SWcontext
*)CALLOC(sizeof(SWcontext
));
719 const GLint maxThreads
= omp_get_max_threads();
721 const GLint maxThreads
= 1;
725 _mesa_debug(ctx
, "_swrast_CreateContext\n");
731 swrast
->NewState
= ~0;
733 swrast
->choose_point
= _swrast_choose_point
;
734 swrast
->choose_line
= _swrast_choose_line
;
735 swrast
->choose_triangle
= _swrast_choose_triangle
;
737 swrast
->InvalidatePointMask
= _SWRAST_NEW_POINT
;
738 swrast
->InvalidateLineMask
= _SWRAST_NEW_LINE
;
739 swrast
->InvalidateTriangleMask
= _SWRAST_NEW_TRIANGLE
;
741 swrast
->Point
= _swrast_validate_point
;
742 swrast
->Line
= _swrast_validate_line
;
743 swrast
->Triangle
= _swrast_validate_triangle
;
744 swrast
->InvalidateState
= _swrast_sleep
;
745 swrast
->BlendFunc
= _swrast_validate_blend_func
;
747 swrast
->AllowVertexFog
= GL_TRUE
;
748 swrast
->AllowPixelFog
= GL_TRUE
;
750 /* Optimized Accum buffer */
751 swrast
->_IntegerAccumMode
= GL_FALSE
;
752 swrast
->_IntegerAccumScaler
= 0.0;
754 for (i
= 0; i
< MAX_TEXTURE_IMAGE_UNITS
; i
++)
755 swrast
->TextureSample
[i
] = NULL
;
757 /* SpanArrays is global and shared by all SWspan instances. However, when
758 * using multiple threads, it is necessary to have one SpanArrays instance
761 swrast
->SpanArrays
= (SWspanarrays
*) MALLOC(maxThreads
* sizeof(SWspanarrays
));
762 if (!swrast
->SpanArrays
) {
766 for(i
= 0; i
< maxThreads
; i
++) {
767 swrast
->SpanArrays
[i
].ChanType
= CHAN_TYPE
;
768 #if CHAN_TYPE == GL_UNSIGNED_BYTE
769 swrast
->SpanArrays
[i
].rgba
= swrast
->SpanArrays
[i
].rgba8
;
770 #elif CHAN_TYPE == GL_UNSIGNED_SHORT
771 swrast
->SpanArrays
[i
].rgba
= swrast
->SpanArrays
[i
].rgba16
;
773 swrast
->SpanArrays
[i
].rgba
= swrast
->SpanArrays
[i
].attribs
[FRAG_ATTRIB_COL0
];
777 /* init point span buffer */
778 swrast
->PointSpan
.primitive
= GL_POINT
;
779 swrast
->PointSpan
.end
= 0;
780 swrast
->PointSpan
.facing
= 0;
781 swrast
->PointSpan
.array
= swrast
->SpanArrays
;
783 /* TexelBuffer is also global and normally shared by all SWspan instances;
784 * when running with multiple threads, create one per thread.
786 swrast
->TexelBuffer
= (GLfloat
*) MALLOC(ctx
->Const
.MaxTextureImageUnits
* maxThreads
*
787 MAX_WIDTH
* 4 * sizeof(GLfloat
));
788 if (!swrast
->TexelBuffer
) {
789 FREE(swrast
->SpanArrays
);
794 init_program_native_limits(&ctx
->Const
.VertexProgram
);
795 init_program_native_limits(&ctx
->Const
.GeometryProgram
);
796 init_program_native_limits(&ctx
->Const
.FragmentProgram
);
798 ctx
->swrast_context
= swrast
;
804 _swrast_DestroyContext( struct gl_context
*ctx
)
806 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
809 _mesa_debug(ctx
, "_swrast_DestroyContext\n");
812 FREE( swrast
->SpanArrays
);
813 if (swrast
->ZoomedArrays
)
814 FREE( swrast
->ZoomedArrays
);
815 FREE( swrast
->TexelBuffer
);
818 ctx
->swrast_context
= 0;
822 struct swrast_device_driver
*
823 _swrast_GetDeviceDriverReference( struct gl_context
*ctx
)
825 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
826 return &swrast
->Driver
;
830 _swrast_flush( struct gl_context
*ctx
)
832 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
833 /* flush any pending fragments from rendering points */
834 if (swrast
->PointSpan
.end
> 0) {
835 _swrast_write_rgba_span(ctx
, &(swrast
->PointSpan
));
836 swrast
->PointSpan
.end
= 0;
841 _swrast_render_primitive( struct gl_context
*ctx
, GLenum prim
)
843 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
844 if (swrast
->Primitive
== GL_POINTS
&& prim
!= GL_POINTS
) {
847 swrast
->Primitive
= prim
;
852 _swrast_render_start( struct gl_context
*ctx
)
854 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
855 if (swrast
->Driver
.SpanRenderStart
)
856 swrast
->Driver
.SpanRenderStart( ctx
);
857 swrast
->PointSpan
.end
= 0;
861 _swrast_render_finish( struct gl_context
*ctx
)
863 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
864 if (swrast
->Driver
.SpanRenderFinish
)
865 swrast
->Driver
.SpanRenderFinish( ctx
);
871 #define SWRAST_DEBUG_VERTICES 0
874 _swrast_print_vertex( struct gl_context
*ctx
, const SWvertex
*v
)
878 if (SWRAST_DEBUG_VERTICES
) {
879 _mesa_debug(ctx
, "win %f %f %f %f\n",
880 v
->attrib
[FRAG_ATTRIB_WPOS
][0],
881 v
->attrib
[FRAG_ATTRIB_WPOS
][1],
882 v
->attrib
[FRAG_ATTRIB_WPOS
][2],
883 v
->attrib
[FRAG_ATTRIB_WPOS
][3]);
885 for (i
= 0 ; i
< ctx
->Const
.MaxTextureCoordUnits
; i
++)
886 if (ctx
->Texture
.Unit
[i
]._ReallyEnabled
)
887 _mesa_debug(ctx
, "texcoord[%d] %f %f %f %f\n", i
,
888 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][0],
889 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][1],
890 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][2],
891 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][3]);
893 #if CHAN_TYPE == GL_FLOAT
894 _mesa_debug(ctx
, "color %f %f %f %f\n",
895 v
->color
[0], v
->color
[1], v
->color
[2], v
->color
[3]);
897 _mesa_debug(ctx
, "color %d %d %d %d\n",
898 v
->color
[0], v
->color
[1], v
->color
[2], v
->color
[3]);
900 _mesa_debug(ctx
, "spec %g %g %g %g\n",
901 v
->attrib
[FRAG_ATTRIB_COL1
][0],
902 v
->attrib
[FRAG_ATTRIB_COL1
][1],
903 v
->attrib
[FRAG_ATTRIB_COL1
][2],
904 v
->attrib
[FRAG_ATTRIB_COL1
][3]);
905 _mesa_debug(ctx
, "fog %f\n", v
->attrib
[FRAG_ATTRIB_FOGC
][0]);
906 _mesa_debug(ctx
, "index %f\n", v
->attrib
[FRAG_ATTRIB_CI
][0]);
907 _mesa_debug(ctx
, "pointsize %f\n", v
->pointSize
);
908 _mesa_debug(ctx
, "\n");