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/samplerobj.h"
34 #include "main/teximage.h"
35 #include "program/prog_parameter.h"
36 #include "program/prog_statevars.h"
39 #include "s_context.h"
43 #include "s_texfetch.h"
44 #include "s_triangle.h"
45 #include "s_texfilter.h"
49 * Recompute the value of swrast->_RasterMask, etc. according to
50 * the current context. The _RasterMask field can be easily tested by
51 * drivers to determine certain basic GL state (does the primitive need
52 * stenciling, logic-op, fog, etc?).
55 _swrast_update_rasterflags( struct gl_context
*ctx
)
57 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
58 GLbitfield rasterMask
= 0;
61 if (ctx
->Color
.AlphaEnabled
) rasterMask
|= ALPHATEST_BIT
;
62 if (ctx
->Color
.BlendEnabled
) rasterMask
|= BLEND_BIT
;
63 if (ctx
->Depth
.Test
) rasterMask
|= DEPTH_BIT
;
64 if (swrast
->_FogEnabled
) rasterMask
|= FOG_BIT
;
65 if (ctx
->Scissor
.Enabled
) rasterMask
|= CLIP_BIT
;
66 if (ctx
->Stencil
._Enabled
) rasterMask
|= STENCIL_BIT
;
67 for (i
= 0; i
< ctx
->Const
.MaxDrawBuffers
; i
++) {
68 if (!ctx
->Color
.ColorMask
[i
][0] ||
69 !ctx
->Color
.ColorMask
[i
][1] ||
70 !ctx
->Color
.ColorMask
[i
][2] ||
71 !ctx
->Color
.ColorMask
[i
][3]) {
72 rasterMask
|= MASKING_BIT
;
76 if (ctx
->Color
.ColorLogicOpEnabled
) rasterMask
|= LOGIC_OP_BIT
;
77 if (ctx
->Texture
._EnabledUnits
) rasterMask
|= TEXTURE_BIT
;
78 if ( ctx
->Viewport
.X
< 0
79 || ctx
->Viewport
.X
+ ctx
->Viewport
.Width
> (GLint
) ctx
->DrawBuffer
->Width
80 || ctx
->Viewport
.Y
< 0
81 || ctx
->Viewport
.Y
+ ctx
->Viewport
.Height
> (GLint
) ctx
->DrawBuffer
->Height
) {
82 rasterMask
|= CLIP_BIT
;
85 if (ctx
->Query
.CurrentOcclusionObject
)
86 rasterMask
|= OCCLUSION_BIT
;
89 /* If we're not drawing to exactly one color buffer set the
90 * MULTI_DRAW_BIT flag. Also set it if we're drawing to no
91 * buffers or the RGBA or CI mask disables all writes.
93 if (ctx
->DrawBuffer
->_NumColorDrawBuffers
!= 1) {
94 /* more than one color buffer designated for writing (or zero buffers) */
95 rasterMask
|= MULTI_DRAW_BIT
;
98 for (i
= 0; i
< ctx
->Const
.MaxDrawBuffers
; i
++) {
99 if (ctx
->Color
.ColorMask
[i
][0] +
100 ctx
->Color
.ColorMask
[i
][1] +
101 ctx
->Color
.ColorMask
[i
][2] +
102 ctx
->Color
.ColorMask
[i
][3] == 0) {
103 rasterMask
|= MULTI_DRAW_BIT
; /* all RGBA channels disabled */
109 if (_swrast_use_fragment_program(ctx
)) {
110 rasterMask
|= FRAGPROG_BIT
;
113 if (ctx
->ATIFragmentShader
._Enabled
) {
114 rasterMask
|= ATIFRAGSHADER_BIT
;
117 #if CHAN_TYPE == GL_FLOAT
118 if (ctx
->Color
.ClampFragmentColor
== GL_TRUE
) {
119 rasterMask
|= CLAMPING_BIT
;
123 SWRAST_CONTEXT(ctx
)->_RasterMask
= rasterMask
;
128 * Examine polygon cull state to compute the _BackfaceCullSign field.
129 * _BackfaceCullSign will be 0 if no culling, -1 if culling back-faces,
130 * and 1 if culling front-faces. The Polygon FrontFace state also
134 _swrast_update_polygon( struct gl_context
*ctx
)
136 GLfloat backface_sign
;
138 if (ctx
->Polygon
.CullFlag
) {
139 switch (ctx
->Polygon
.CullFaceMode
) {
141 backface_sign
= -1.0F
;
144 backface_sign
= 1.0F
;
146 case GL_FRONT_AND_BACK
:
149 backface_sign
= 0.0F
;
153 backface_sign
= 0.0F
;
156 SWRAST_CONTEXT(ctx
)->_BackfaceCullSign
= backface_sign
;
158 /* This is for front/back-face determination, but not for culling */
159 SWRAST_CONTEXT(ctx
)->_BackfaceSign
160 = (ctx
->Polygon
.FrontFace
== GL_CW
) ? -1.0F
: 1.0F
;
166 * Update the _PreferPixelFog field to indicate if we need to compute
167 * fog blend factors (from the fog coords) per-fragment.
170 _swrast_update_fog_hint( struct gl_context
*ctx
)
172 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
173 swrast
->_PreferPixelFog
= (!swrast
->AllowVertexFog
||
174 _swrast_use_fragment_program(ctx
) ||
175 (ctx
->Hint
.Fog
== GL_NICEST
&&
176 swrast
->AllowPixelFog
));
182 * Update the swrast->_TextureCombinePrimary flag.
185 _swrast_update_texture_env( struct gl_context
*ctx
)
187 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
190 swrast
->_TextureCombinePrimary
= GL_FALSE
;
192 for (i
= 0; i
< ctx
->Const
.MaxTextureUnits
; i
++) {
193 const struct gl_tex_env_combine_state
*combine
=
194 ctx
->Texture
.Unit
[i
]._CurrentCombine
;
196 for (term
= 0; term
< combine
->_NumArgsRGB
; term
++) {
197 if (combine
->SourceRGB
[term
] == GL_PRIMARY_COLOR
) {
198 swrast
->_TextureCombinePrimary
= GL_TRUE
;
201 if (combine
->SourceA
[term
] == GL_PRIMARY_COLOR
) {
202 swrast
->_TextureCombinePrimary
= GL_TRUE
;
211 * Determine if we can defer texturing/shading until after Z/stencil
212 * testing. This potentially allows us to skip texturing/shading for
216 _swrast_update_deferred_texture(struct gl_context
*ctx
)
218 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
219 if (ctx
->Color
.AlphaEnabled
) {
220 /* alpha test depends on post-texture/shader colors */
221 swrast
->_DeferredTexture
= GL_FALSE
;
224 GLboolean use_fprog
= _swrast_use_fragment_program(ctx
);
225 const struct gl_fragment_program
*fprog
226 = ctx
->FragmentProgram
._Current
;
227 if (use_fprog
&& (fprog
->Base
.OutputsWritten
& (1 << FRAG_RESULT_DEPTH
))) {
228 /* Z comes from fragment program/shader */
229 swrast
->_DeferredTexture
= GL_FALSE
;
231 else if (use_fprog
&& fprog
->UsesKill
) {
232 swrast
->_DeferredTexture
= GL_FALSE
;
234 else if (ctx
->Query
.CurrentOcclusionObject
) {
235 /* occlusion query depends on shader discard/kill results */
236 swrast
->_DeferredTexture
= GL_FALSE
;
239 swrast
->_DeferredTexture
= GL_TRUE
;
246 * Update swrast->_FogColor and swrast->_FogEnable values.
249 _swrast_update_fog_state( struct gl_context
*ctx
)
251 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
252 const struct gl_fragment_program
*fp
= ctx
->FragmentProgram
._Current
;
254 assert(fp
== NULL
|| fp
->Base
.Target
== GL_FRAGMENT_PROGRAM_ARB
);
256 /* determine if fog is needed, and if so, which fog mode */
257 swrast
->_FogEnabled
= (!_swrast_use_fragment_program(ctx
) &&
263 * Update state for running fragment programs. Basically, load the
264 * program parameters with current state values.
267 _swrast_update_fragment_program(struct gl_context
*ctx
, GLbitfield newState
)
269 if (!_swrast_use_fragment_program(ctx
))
272 _mesa_load_state_parameters(ctx
,
273 ctx
->FragmentProgram
._Current
->Base
.Parameters
);
278 * See if we can do early diffuse+specular (primary+secondary) color
279 * add per vertex instead of per-fragment.
282 _swrast_update_specular_vertex_add(struct gl_context
*ctx
)
284 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
285 GLboolean separateSpecular
= ctx
->Fog
.ColorSumEnabled
||
286 (ctx
->Light
.Enabled
&&
287 ctx
->Light
.Model
.ColorControl
== GL_SEPARATE_SPECULAR_COLOR
);
289 swrast
->SpecularVertexAdd
= (separateSpecular
290 && ctx
->Texture
._EnabledUnits
== 0x0
291 && !_swrast_use_fragment_program(ctx
)
292 && !ctx
->ATIFragmentShader
._Enabled
);
296 #define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK | \
297 _NEW_PROGRAM_CONSTANTS | \
302 /* State referenced by _swrast_choose_triangle, _swrast_choose_line.
304 #define _SWRAST_NEW_TRIANGLE (_SWRAST_NEW_DERIVED | \
311 _SWRAST_NEW_RASTERMASK| \
314 _MESA_NEW_SEPARATE_SPECULAR)
316 #define _SWRAST_NEW_LINE (_SWRAST_NEW_DERIVED | \
323 _MESA_NEW_SEPARATE_SPECULAR)
325 #define _SWRAST_NEW_POINT (_SWRAST_NEW_DERIVED | \
331 _MESA_NEW_SEPARATE_SPECULAR)
333 #define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE
335 #define _SWRAST_NEW_TEXTURE_ENV_MODE _NEW_TEXTURE
337 #define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR
342 * Stub for swrast->Triangle to select a true triangle function
343 * after a state change.
346 _swrast_validate_triangle( struct gl_context
*ctx
,
351 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
353 _swrast_validate_derived( ctx
);
354 swrast
->choose_triangle( ctx
);
355 ASSERT(swrast
->Triangle
);
357 if (swrast
->SpecularVertexAdd
) {
358 /* separate specular color, but no texture */
359 swrast
->SpecTriangle
= swrast
->Triangle
;
360 swrast
->Triangle
= _swrast_add_spec_terms_triangle
;
363 swrast
->Triangle( ctx
, v0
, v1
, v2
);
367 * Called via swrast->Line. Examine current GL state and choose a software
368 * line routine. Then call it.
371 _swrast_validate_line( struct gl_context
*ctx
, const SWvertex
*v0
, const SWvertex
*v1
)
373 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
375 _swrast_validate_derived( ctx
);
376 swrast
->choose_line( ctx
);
377 ASSERT(swrast
->Line
);
379 if (swrast
->SpecularVertexAdd
) {
380 swrast
->SpecLine
= swrast
->Line
;
381 swrast
->Line
= _swrast_add_spec_terms_line
;
384 swrast
->Line( ctx
, v0
, v1
);
388 * Called via swrast->Point. Examine current GL state and choose a software
389 * point routine. Then call it.
392 _swrast_validate_point( struct gl_context
*ctx
, const SWvertex
*v0
)
394 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
396 _swrast_validate_derived( ctx
);
397 swrast
->choose_point( ctx
);
399 if (swrast
->SpecularVertexAdd
) {
400 swrast
->SpecPoint
= swrast
->Point
;
401 swrast
->Point
= _swrast_add_spec_terms_point
;
404 swrast
->Point( ctx
, v0
);
409 * Called via swrast->BlendFunc. Examine GL state to choose a blending
410 * function, then call it.
413 _swrast_validate_blend_func(struct gl_context
*ctx
, GLuint n
, const GLubyte mask
[],
414 GLvoid
*src
, const GLvoid
*dst
,
417 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
419 _swrast_validate_derived( ctx
); /* why is this needed? */
420 _swrast_choose_blend_func( ctx
, chanType
);
422 swrast
->BlendFunc( ctx
, n
, mask
, src
, dst
, chanType
);
426 _swrast_sleep( struct gl_context
*ctx
, GLbitfield new_state
)
428 (void) ctx
; (void) new_state
;
433 _swrast_invalidate_state( struct gl_context
*ctx
, GLbitfield new_state
)
435 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
438 swrast
->NewState
|= new_state
;
440 /* After 10 statechanges without any swrast functions being called,
441 * put the module to sleep.
443 if (++swrast
->StateChanges
> 10) {
444 swrast
->InvalidateState
= _swrast_sleep
;
445 swrast
->NewState
= ~0;
449 if (new_state
& swrast
->InvalidateTriangleMask
)
450 swrast
->Triangle
= _swrast_validate_triangle
;
452 if (new_state
& swrast
->InvalidateLineMask
)
453 swrast
->Line
= _swrast_validate_line
;
455 if (new_state
& swrast
->InvalidatePointMask
)
456 swrast
->Point
= _swrast_validate_point
;
458 if (new_state
& _SWRAST_NEW_BLEND_FUNC
)
459 swrast
->BlendFunc
= _swrast_validate_blend_func
;
461 if (new_state
& _SWRAST_NEW_TEXTURE_SAMPLE_FUNC
)
462 for (i
= 0 ; i
< ctx
->Const
.MaxTextureImageUnits
; i
++)
463 swrast
->TextureSample
[i
] = NULL
;
468 _swrast_update_texture_samplers(struct gl_context
*ctx
)
470 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
474 return; /* pipe hack */
476 for (u
= 0; u
< ctx
->Const
.MaxTextureImageUnits
; u
++) {
477 struct gl_texture_object
*tObj
= ctx
->Texture
.Unit
[u
]._Current
;
478 /* Note: If tObj is NULL, the sample function will be a simple
479 * function that just returns opaque black (0,0,0,1).
481 _mesa_update_fetch_functions(ctx
, u
);
482 swrast
->TextureSample
[u
] =
483 _swrast_choose_texture_sample_func(ctx
, tObj
,
484 _mesa_get_samplerobj(ctx
, u
));
490 * Update swrast->_ActiveAttribs, swrast->_NumActiveAttribs,
491 * swrast->_ActiveAtttribMask.
494 _swrast_update_active_attribs(struct gl_context
*ctx
)
496 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
497 GLbitfield64 attribsMask
;
500 * Compute _ActiveAttribsMask = which fragment attributes are needed.
502 if (_swrast_use_fragment_program(ctx
)) {
503 /* fragment program/shader */
504 attribsMask
= ctx
->FragmentProgram
._Current
->Base
.InputsRead
;
505 attribsMask
&= ~FRAG_BIT_WPOS
; /* WPOS is always handled specially */
507 else if (ctx
->ATIFragmentShader
._Enabled
) {
508 attribsMask
= ~0; /* XXX fix me */
514 #if CHAN_TYPE == GL_FLOAT
515 attribsMask
|= FRAG_BIT_COL0
;
518 if (ctx
->Fog
.ColorSumEnabled
||
519 (ctx
->Light
.Enabled
&&
520 ctx
->Light
.Model
.ColorControl
== GL_SEPARATE_SPECULAR_COLOR
)) {
521 attribsMask
|= FRAG_BIT_COL1
;
524 if (swrast
->_FogEnabled
)
525 attribsMask
|= FRAG_BIT_FOGC
;
527 attribsMask
|= (ctx
->Texture
._EnabledUnits
<< FRAG_ATTRIB_TEX0
);
530 swrast
->_ActiveAttribMask
= attribsMask
;
532 /* Update _ActiveAttribs[] list */
535 for (i
= 0; i
< FRAG_ATTRIB_MAX
; i
++) {
536 if (attribsMask
& BITFIELD64_BIT(i
)) {
537 swrast
->_ActiveAttribs
[num
++] = i
;
538 /* how should this attribute be interpolated? */
539 if (i
== FRAG_ATTRIB_COL0
|| i
== FRAG_ATTRIB_COL1
)
540 swrast
->_InterpMode
[i
] = ctx
->Light
.ShadeModel
;
542 swrast
->_InterpMode
[i
] = GL_SMOOTH
;
545 swrast
->_NumActiveAttribs
= num
;
551 _swrast_validate_derived( struct gl_context
*ctx
)
553 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
555 if (swrast
->NewState
) {
556 if (swrast
->NewState
& _NEW_POLYGON
)
557 _swrast_update_polygon( ctx
);
559 if (swrast
->NewState
& (_NEW_HINT
| _NEW_PROGRAM
))
560 _swrast_update_fog_hint( ctx
);
562 if (swrast
->NewState
& _SWRAST_NEW_TEXTURE_ENV_MODE
)
563 _swrast_update_texture_env( ctx
);
565 if (swrast
->NewState
& (_NEW_FOG
| _NEW_PROGRAM
))
566 _swrast_update_fog_state( ctx
);
568 if (swrast
->NewState
& (_NEW_PROGRAM_CONSTANTS
| _NEW_PROGRAM
))
569 _swrast_update_fragment_program( ctx
, swrast
->NewState
);
571 if (swrast
->NewState
& (_NEW_TEXTURE
| _NEW_PROGRAM
)) {
572 _swrast_update_texture_samplers( ctx
);
575 if (swrast
->NewState
& (_NEW_COLOR
| _NEW_PROGRAM
))
576 _swrast_update_deferred_texture(ctx
);
578 if (swrast
->NewState
& _SWRAST_NEW_RASTERMASK
)
579 _swrast_update_rasterflags( ctx
);
581 if (swrast
->NewState
& (_NEW_DEPTH
|
586 _swrast_update_active_attribs(ctx
);
588 if (swrast
->NewState
& (_NEW_FOG
|
592 _swrast_update_specular_vertex_add(ctx
);
594 swrast
->NewState
= 0;
595 swrast
->StateChanges
= 0;
596 swrast
->InvalidateState
= _swrast_invalidate_state
;
600 #define SWRAST_DEBUG 0
602 /* Public entrypoints: See also s_bitmap.c, etc.
605 _swrast_Quad( struct gl_context
*ctx
,
606 const SWvertex
*v0
, const SWvertex
*v1
,
607 const SWvertex
*v2
, const SWvertex
*v3
)
610 _mesa_debug(ctx
, "_swrast_Quad\n");
611 _swrast_print_vertex( ctx
, v0
);
612 _swrast_print_vertex( ctx
, v1
);
613 _swrast_print_vertex( ctx
, v2
);
614 _swrast_print_vertex( ctx
, v3
);
616 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v0
, v1
, v3
);
617 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v1
, v2
, v3
);
621 _swrast_Triangle( struct gl_context
*ctx
, const SWvertex
*v0
,
622 const SWvertex
*v1
, const SWvertex
*v2
)
625 _mesa_debug(ctx
, "_swrast_Triangle\n");
626 _swrast_print_vertex( ctx
, v0
);
627 _swrast_print_vertex( ctx
, v1
);
628 _swrast_print_vertex( ctx
, v2
);
630 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v0
, v1
, v2
);
634 _swrast_Line( struct gl_context
*ctx
, const SWvertex
*v0
, const SWvertex
*v1
)
637 _mesa_debug(ctx
, "_swrast_Line\n");
638 _swrast_print_vertex( ctx
, v0
);
639 _swrast_print_vertex( ctx
, v1
);
641 SWRAST_CONTEXT(ctx
)->Line( ctx
, v0
, v1
);
645 _swrast_Point( struct gl_context
*ctx
, const SWvertex
*v0
)
648 _mesa_debug(ctx
, "_swrast_Point\n");
649 _swrast_print_vertex( ctx
, v0
);
651 SWRAST_CONTEXT(ctx
)->Point( ctx
, v0
);
655 _swrast_InvalidateState( struct gl_context
*ctx
, GLbitfield new_state
)
658 _mesa_debug(ctx
, "_swrast_InvalidateState\n");
660 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, new_state
);
664 _swrast_ResetLineStipple( struct gl_context
*ctx
)
667 _mesa_debug(ctx
, "_swrast_ResetLineStipple\n");
669 SWRAST_CONTEXT(ctx
)->StippleCounter
= 0;
673 _swrast_SetFacing(struct gl_context
*ctx
, GLuint facing
)
675 SWRAST_CONTEXT(ctx
)->PointLineFacing
= facing
;
679 _swrast_allow_vertex_fog( struct gl_context
*ctx
, GLboolean value
)
682 _mesa_debug(ctx
, "_swrast_allow_vertex_fog %d\n", value
);
684 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, _NEW_HINT
);
685 SWRAST_CONTEXT(ctx
)->AllowVertexFog
= value
;
689 _swrast_allow_pixel_fog( struct gl_context
*ctx
, GLboolean value
)
692 _mesa_debug(ctx
, "_swrast_allow_pixel_fog %d\n", value
);
694 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, _NEW_HINT
);
695 SWRAST_CONTEXT(ctx
)->AllowPixelFog
= value
;
700 * Initialize native program limits by copying the logical limits.
701 * See comments in init_program_limits() in context.c
704 init_program_native_limits(struct gl_program_constants
*prog
)
706 prog
->MaxNativeInstructions
= prog
->MaxInstructions
;
707 prog
->MaxNativeAluInstructions
= prog
->MaxAluInstructions
;
708 prog
->MaxNativeTexInstructions
= prog
->MaxTexInstructions
;
709 prog
->MaxNativeTexIndirections
= prog
->MaxTexIndirections
;
710 prog
->MaxNativeAttribs
= prog
->MaxAttribs
;
711 prog
->MaxNativeTemps
= prog
->MaxTemps
;
712 prog
->MaxNativeAddressRegs
= prog
->MaxAddressRegs
;
713 prog
->MaxNativeParameters
= prog
->MaxParameters
;
718 _swrast_CreateContext( struct gl_context
*ctx
)
721 SWcontext
*swrast
= calloc(1, sizeof(SWcontext
));
723 const GLuint maxThreads
= omp_get_max_threads();
725 const GLuint maxThreads
= 1;
728 assert(ctx
->Const
.MaxViewportWidth
<= SWRAST_MAX_WIDTH
);
729 assert(ctx
->Const
.MaxViewportHeight
<= SWRAST_MAX_WIDTH
);
731 assert(ctx
->Const
.MaxRenderbufferSize
<= SWRAST_MAX_WIDTH
);
733 /* make sure largest texture image is <= SWRAST_MAX_WIDTH in size */
734 assert((1 << (ctx
->Const
.MaxTextureLevels
- 1)) <= SWRAST_MAX_WIDTH
);
735 assert((1 << (ctx
->Const
.MaxCubeTextureLevels
- 1)) <= SWRAST_MAX_WIDTH
);
736 assert((1 << (ctx
->Const
.Max3DTextureLevels
- 1)) <= SWRAST_MAX_WIDTH
);
738 assert(PROG_MAX_WIDTH
== SWRAST_MAX_WIDTH
);
741 _mesa_debug(ctx
, "_swrast_CreateContext\n");
747 swrast
->NewState
= ~0;
749 swrast
->choose_point
= _swrast_choose_point
;
750 swrast
->choose_line
= _swrast_choose_line
;
751 swrast
->choose_triangle
= _swrast_choose_triangle
;
753 swrast
->InvalidatePointMask
= _SWRAST_NEW_POINT
;
754 swrast
->InvalidateLineMask
= _SWRAST_NEW_LINE
;
755 swrast
->InvalidateTriangleMask
= _SWRAST_NEW_TRIANGLE
;
757 swrast
->Point
= _swrast_validate_point
;
758 swrast
->Line
= _swrast_validate_line
;
759 swrast
->Triangle
= _swrast_validate_triangle
;
760 swrast
->InvalidateState
= _swrast_sleep
;
761 swrast
->BlendFunc
= _swrast_validate_blend_func
;
763 swrast
->AllowVertexFog
= GL_TRUE
;
764 swrast
->AllowPixelFog
= GL_TRUE
;
766 swrast
->Driver
.SpanRenderStart
= _swrast_span_render_start
;
767 swrast
->Driver
.SpanRenderFinish
= _swrast_span_render_finish
;
769 for (i
= 0; i
< MAX_TEXTURE_IMAGE_UNITS
; i
++)
770 swrast
->TextureSample
[i
] = NULL
;
772 /* SpanArrays is global and shared by all SWspan instances. However, when
773 * using multiple threads, it is necessary to have one SpanArrays instance
776 swrast
->SpanArrays
= malloc(maxThreads
* sizeof(SWspanarrays
));
777 if (!swrast
->SpanArrays
) {
781 for(i
= 0; i
< maxThreads
; i
++) {
782 swrast
->SpanArrays
[i
].ChanType
= CHAN_TYPE
;
783 #if CHAN_TYPE == GL_UNSIGNED_BYTE
784 swrast
->SpanArrays
[i
].rgba
= swrast
->SpanArrays
[i
].rgba8
;
785 #elif CHAN_TYPE == GL_UNSIGNED_SHORT
786 swrast
->SpanArrays
[i
].rgba
= swrast
->SpanArrays
[i
].rgba16
;
788 swrast
->SpanArrays
[i
].rgba
= swrast
->SpanArrays
[i
].attribs
[FRAG_ATTRIB_COL0
];
792 /* init point span buffer */
793 swrast
->PointSpan
.primitive
= GL_POINT
;
794 swrast
->PointSpan
.end
= 0;
795 swrast
->PointSpan
.facing
= 0;
796 swrast
->PointSpan
.array
= swrast
->SpanArrays
;
798 init_program_native_limits(&ctx
->Const
.VertexProgram
);
799 init_program_native_limits(&ctx
->Const
.GeometryProgram
);
800 init_program_native_limits(&ctx
->Const
.FragmentProgram
);
802 ctx
->swrast_context
= swrast
;
804 swrast
->stencil_temp
.buf1
= malloc(SWRAST_MAX_WIDTH
* sizeof(GLubyte
));
805 swrast
->stencil_temp
.buf2
= malloc(SWRAST_MAX_WIDTH
* sizeof(GLubyte
));
806 swrast
->stencil_temp
.buf3
= malloc(SWRAST_MAX_WIDTH
* sizeof(GLubyte
));
807 swrast
->stencil_temp
.buf4
= malloc(SWRAST_MAX_WIDTH
* sizeof(GLubyte
));
809 if (!swrast
->stencil_temp
.buf1
||
810 !swrast
->stencil_temp
.buf2
||
811 !swrast
->stencil_temp
.buf3
||
812 !swrast
->stencil_temp
.buf4
) {
813 _swrast_DestroyContext(ctx
);
821 _swrast_DestroyContext( struct gl_context
*ctx
)
823 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
826 _mesa_debug(ctx
, "_swrast_DestroyContext\n");
829 free( swrast
->SpanArrays
);
830 free( swrast
->ZoomedArrays
);
831 free( swrast
->TexelBuffer
);
833 free(swrast
->stencil_temp
.buf1
);
834 free(swrast
->stencil_temp
.buf2
);
835 free(swrast
->stencil_temp
.buf3
);
836 free(swrast
->stencil_temp
.buf4
);
840 ctx
->swrast_context
= 0;
844 struct swrast_device_driver
*
845 _swrast_GetDeviceDriverReference( struct gl_context
*ctx
)
847 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
848 return &swrast
->Driver
;
852 _swrast_flush( struct gl_context
*ctx
)
854 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
855 /* flush any pending fragments from rendering points */
856 if (swrast
->PointSpan
.end
> 0) {
857 _swrast_write_rgba_span(ctx
, &(swrast
->PointSpan
));
858 swrast
->PointSpan
.end
= 0;
863 _swrast_render_primitive( struct gl_context
*ctx
, GLenum prim
)
865 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
866 if (swrast
->Primitive
== GL_POINTS
&& prim
!= GL_POINTS
) {
869 swrast
->Primitive
= prim
;
873 /** called via swrast->Driver.SpanRenderStart() */
875 _swrast_span_render_start(struct gl_context
*ctx
)
877 _swrast_map_textures(ctx
);
878 _swrast_map_renderbuffers(ctx
);
882 /** called via swrast->Driver.SpanRenderFinish() */
884 _swrast_span_render_finish(struct gl_context
*ctx
)
886 _swrast_unmap_textures(ctx
);
887 _swrast_unmap_renderbuffers(ctx
);
892 _swrast_render_start( struct gl_context
*ctx
)
894 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
895 if (swrast
->Driver
.SpanRenderStart
)
896 swrast
->Driver
.SpanRenderStart( ctx
);
897 swrast
->PointSpan
.end
= 0;
901 _swrast_render_finish( struct gl_context
*ctx
)
903 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
907 if (swrast
->Driver
.SpanRenderFinish
)
908 swrast
->Driver
.SpanRenderFinish( ctx
);
912 #define SWRAST_DEBUG_VERTICES 0
915 _swrast_print_vertex( struct gl_context
*ctx
, const SWvertex
*v
)
919 if (SWRAST_DEBUG_VERTICES
) {
920 _mesa_debug(ctx
, "win %f %f %f %f\n",
921 v
->attrib
[FRAG_ATTRIB_WPOS
][0],
922 v
->attrib
[FRAG_ATTRIB_WPOS
][1],
923 v
->attrib
[FRAG_ATTRIB_WPOS
][2],
924 v
->attrib
[FRAG_ATTRIB_WPOS
][3]);
926 for (i
= 0 ; i
< ctx
->Const
.MaxTextureCoordUnits
; i
++)
927 if (ctx
->Texture
.Unit
[i
]._ReallyEnabled
)
928 _mesa_debug(ctx
, "texcoord[%d] %f %f %f %f\n", i
,
929 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][0],
930 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][1],
931 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][2],
932 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][3]);
934 #if CHAN_TYPE == GL_FLOAT
935 _mesa_debug(ctx
, "color %f %f %f %f\n",
936 v
->color
[0], v
->color
[1], v
->color
[2], v
->color
[3]);
938 _mesa_debug(ctx
, "color %d %d %d %d\n",
939 v
->color
[0], v
->color
[1], v
->color
[2], v
->color
[3]);
941 _mesa_debug(ctx
, "spec %g %g %g %g\n",
942 v
->attrib
[FRAG_ATTRIB_COL1
][0],
943 v
->attrib
[FRAG_ATTRIB_COL1
][1],
944 v
->attrib
[FRAG_ATTRIB_COL1
][2],
945 v
->attrib
[FRAG_ATTRIB_COL1
][3]);
946 _mesa_debug(ctx
, "fog %f\n", v
->attrib
[FRAG_ATTRIB_FOGC
][0]);
947 _mesa_debug(ctx
, "index %f\n", v
->attrib
[FRAG_ATTRIB_CI
][0]);
948 _mesa_debug(ctx
, "pointsize %f\n", v
->pointSize
);
949 _mesa_debug(ctx
, "\n");