2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS 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 <keithw@vmware.com> Brian Paul
28 #include "main/imports.h"
29 #include "main/bufferobj.h"
30 #include "main/mtypes.h"
31 #include "main/samplerobj.h"
32 #include "main/state.h"
33 #include "main/stencil.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
.EnableFlags
) rasterMask
|= CLIP_BIT
;
66 if (_mesa_stencil_is_enabled(ctx
)) rasterMask
|= STENCIL_BIT
;
67 for (i
= 0; i
< ctx
->Const
.MaxDrawBuffers
; i
++) {
68 if (GET_COLORMASK(ctx
->Color
.ColorMask
, i
) != 0xf) {
69 rasterMask
|= MASKING_BIT
;
73 if (ctx
->Color
.ColorLogicOpEnabled
) rasterMask
|= LOGIC_OP_BIT
;
74 if (ctx
->Texture
._MaxEnabledTexImageUnit
>= 0) rasterMask
|= TEXTURE_BIT
;
75 if ( ctx
->ViewportArray
[0].X
< 0
76 || ctx
->ViewportArray
[0].X
+ ctx
->ViewportArray
[0].Width
> (GLfloat
) ctx
->DrawBuffer
->Width
77 || ctx
->ViewportArray
[0].Y
< 0
78 || ctx
->ViewportArray
[0].Y
+ ctx
->ViewportArray
[0].Height
> (GLfloat
) ctx
->DrawBuffer
->Height
) {
79 rasterMask
|= CLIP_BIT
;
82 if (ctx
->Query
.CurrentOcclusionObject
)
83 rasterMask
|= OCCLUSION_BIT
;
86 /* If we're not drawing to exactly one color buffer set the
87 * MULTI_DRAW_BIT flag. Also set it if we're drawing to no
88 * buffers or the RGBA or CI mask disables all writes.
90 if (ctx
->DrawBuffer
->_NumColorDrawBuffers
!= 1) {
91 /* more than one color buffer designated for writing (or zero buffers) */
92 rasterMask
|= MULTI_DRAW_BIT
;
95 for (i
= 0; i
< ctx
->Const
.MaxDrawBuffers
; i
++) {
96 if (GET_COLORMASK(ctx
->Color
.ColorMask
, i
) == 0) {
97 rasterMask
|= MULTI_DRAW_BIT
; /* all RGBA channels disabled */
103 if (_swrast_use_fragment_program(ctx
)) {
104 rasterMask
|= FRAGPROG_BIT
;
107 if (_mesa_ati_fragment_shader_enabled(ctx
)) {
108 rasterMask
|= ATIFRAGSHADER_BIT
;
111 #if CHAN_TYPE == GL_FLOAT
112 if (ctx
->Color
.ClampFragmentColor
== GL_TRUE
) {
113 rasterMask
|= CLAMPING_BIT
;
117 SWRAST_CONTEXT(ctx
)->_RasterMask
= rasterMask
;
122 * Examine polygon cull state to compute the _BackfaceCullSign field.
123 * _BackfaceCullSign will be 0 if no culling, -1 if culling back-faces,
124 * and 1 if culling front-faces. The Polygon FrontFace state also
128 _swrast_update_polygon( struct gl_context
*ctx
)
130 GLfloat backface_sign
;
132 if (ctx
->Polygon
.CullFlag
) {
133 switch (ctx
->Polygon
.CullFaceMode
) {
135 backface_sign
= -1.0F
;
138 backface_sign
= 1.0F
;
140 case GL_FRONT_AND_BACK
:
143 backface_sign
= 0.0F
;
147 backface_sign
= 0.0F
;
150 SWRAST_CONTEXT(ctx
)->_BackfaceCullSign
= backface_sign
;
152 /* This is for front/back-face determination, but not for culling */
153 SWRAST_CONTEXT(ctx
)->_BackfaceSign
154 = (ctx
->Polygon
.FrontFace
== GL_CW
) ? -1.0F
: 1.0F
;
160 * Update the _PreferPixelFog field to indicate if we need to compute
161 * fog blend factors (from the fog coords) per-fragment.
164 _swrast_update_fog_hint( struct gl_context
*ctx
)
166 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
167 swrast
->_PreferPixelFog
= (!swrast
->AllowVertexFog
||
168 _swrast_use_fragment_program(ctx
) ||
169 (ctx
->Hint
.Fog
== GL_NICEST
&&
170 swrast
->AllowPixelFog
));
176 * Update the swrast->_TextureCombinePrimary flag.
179 _swrast_update_texture_env( struct gl_context
*ctx
)
181 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
184 swrast
->_TextureCombinePrimary
= GL_FALSE
;
186 for (i
= 0; i
< ctx
->Const
.MaxTextureUnits
; i
++) {
187 const struct gl_tex_env_combine_state
*combine
=
188 ctx
->Texture
.FixedFuncUnit
[i
]._CurrentCombine
;
190 for (term
= 0; term
< combine
->_NumArgsRGB
; term
++) {
191 if (combine
->SourceRGB
[term
] == GL_PRIMARY_COLOR
) {
192 swrast
->_TextureCombinePrimary
= GL_TRUE
;
195 if (combine
->SourceA
[term
] == GL_PRIMARY_COLOR
) {
196 swrast
->_TextureCombinePrimary
= GL_TRUE
;
205 * Determine if we can defer texturing/shading until after Z/stencil
206 * testing. This potentially allows us to skip texturing/shading for
210 _swrast_update_deferred_texture(struct gl_context
*ctx
)
212 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
213 if (ctx
->Color
.AlphaEnabled
) {
214 /* alpha test depends on post-texture/shader colors */
215 swrast
->_DeferredTexture
= GL_FALSE
;
218 GLboolean use_fprog
= _swrast_use_fragment_program(ctx
);
219 const struct gl_program
*fprog
= ctx
->FragmentProgram
._Current
;
221 (fprog
->info
.outputs_written
& (1 << FRAG_RESULT_DEPTH
))) {
222 /* Z comes from fragment program/shader */
223 swrast
->_DeferredTexture
= GL_FALSE
;
225 else if (use_fprog
&& fprog
->info
.fs
.uses_discard
) {
226 swrast
->_DeferredTexture
= GL_FALSE
;
228 else if (ctx
->Query
.CurrentOcclusionObject
) {
229 /* occlusion query depends on shader discard/kill results */
230 swrast
->_DeferredTexture
= GL_FALSE
;
233 swrast
->_DeferredTexture
= GL_TRUE
;
240 * Update swrast->_FogColor and swrast->_FogEnable values.
243 _swrast_update_fog_state( struct gl_context
*ctx
)
245 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
246 const struct gl_program
*fp
= ctx
->FragmentProgram
._Current
;
248 assert(fp
== NULL
|| fp
->Target
== GL_FRAGMENT_PROGRAM_ARB
);
249 (void) fp
; /* silence unused var warning */
251 /* determine if fog is needed, and if so, which fog mode */
252 swrast
->_FogEnabled
= (!_swrast_use_fragment_program(ctx
) &&
258 * Update state for running fragment programs. Basically, load the
259 * program parameters with current state values.
262 _swrast_update_fragment_program(struct gl_context
*ctx
, GLbitfield newState
)
264 if (!_swrast_use_fragment_program(ctx
))
267 _mesa_load_state_parameters(ctx
,
268 ctx
->FragmentProgram
._Current
->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
._MaxEnabledTexImageUnit
== -1
286 && !_swrast_use_fragment_program(ctx
)
287 && !_mesa_ati_fragment_shader_enabled(ctx
));
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 _MESA_NEW_SEPARATE_SPECULAR)
311 #define _SWRAST_NEW_LINE (_SWRAST_NEW_DERIVED | \
318 _MESA_NEW_SEPARATE_SPECULAR)
320 #define _SWRAST_NEW_POINT (_SWRAST_NEW_DERIVED | \
326 _MESA_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
< ARRAY_SIZE(swrast
->TextureSample
); 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
< ARRAY_SIZE(swrast
->TextureSample
); u
++) {
472 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 _mesa_update_fetch_functions(ctx
, u
);
477 swrast
->TextureSample
[u
] =
478 _swrast_choose_texture_sample_func(ctx
, tObj
,
479 _mesa_get_samplerobj(ctx
, u
));
485 * Update swrast->_ActiveAttribs, swrast->_NumActiveAttribs,
486 * swrast->_ActiveAtttribMask.
489 _swrast_update_active_attribs(struct gl_context
*ctx
)
491 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
492 GLbitfield64 attribsMask
;
495 * Compute _ActiveAttribsMask = which fragment attributes are needed.
497 if (_swrast_use_fragment_program(ctx
)) {
498 /* fragment program/shader */
499 attribsMask
= ctx
->FragmentProgram
._Current
->info
.inputs_read
;
500 attribsMask
&= ~VARYING_BIT_POS
; /* WPOS is always handled specially */
502 else if (_mesa_ati_fragment_shader_enabled(ctx
)) {
503 attribsMask
= VARYING_BIT_COL0
| VARYING_BIT_COL1
|
504 VARYING_BIT_FOGC
| VARYING_BITS_TEX_ANY
;
510 #if CHAN_TYPE == GL_FLOAT
511 attribsMask
|= VARYING_BIT_COL0
;
514 if (ctx
->Fog
.ColorSumEnabled
||
515 (ctx
->Light
.Enabled
&&
516 ctx
->Light
.Model
.ColorControl
== GL_SEPARATE_SPECULAR_COLOR
)) {
517 attribsMask
|= VARYING_BIT_COL1
;
520 if (swrast
->_FogEnabled
)
521 attribsMask
|= VARYING_BIT_FOGC
;
523 attribsMask
|= (ctx
->Texture
._EnabledCoordUnits
<< VARYING_SLOT_TEX0
);
526 swrast
->_ActiveAttribMask
= attribsMask
;
528 /* Update _ActiveAttribs[] list */
531 for (i
= 0; i
< VARYING_SLOT_MAX
; i
++) {
532 if (attribsMask
& BITFIELD64_BIT(i
)) {
533 swrast
->_ActiveAttribs
[num
++] = i
;
534 /* how should this attribute be interpolated? */
535 if (i
== VARYING_SLOT_COL0
|| i
== VARYING_SLOT_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_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
= calloc(1, sizeof(SWcontext
));
719 const GLuint maxThreads
= omp_get_max_threads();
721 const GLuint maxThreads
= 1;
724 assert(ctx
->Const
.MaxViewportWidth
<= SWRAST_MAX_WIDTH
);
725 assert(ctx
->Const
.MaxViewportHeight
<= SWRAST_MAX_WIDTH
);
727 assert(ctx
->Const
.MaxRenderbufferSize
<= SWRAST_MAX_WIDTH
);
729 /* make sure largest texture image is <= SWRAST_MAX_WIDTH in size */
730 assert((1 << (ctx
->Const
.MaxTextureLevels
- 1)) <= SWRAST_MAX_WIDTH
);
731 assert((1 << (ctx
->Const
.MaxCubeTextureLevels
- 1)) <= SWRAST_MAX_WIDTH
);
732 assert((1 << (ctx
->Const
.Max3DTextureLevels
- 1)) <= SWRAST_MAX_WIDTH
);
734 assert(PROG_MAX_WIDTH
== SWRAST_MAX_WIDTH
);
737 _mesa_debug(ctx
, "_swrast_CreateContext\n");
743 swrast
->NewState
= ~0;
745 swrast
->choose_point
= _swrast_choose_point
;
746 swrast
->choose_line
= _swrast_choose_line
;
747 swrast
->choose_triangle
= _swrast_choose_triangle
;
749 swrast
->InvalidatePointMask
= _SWRAST_NEW_POINT
;
750 swrast
->InvalidateLineMask
= _SWRAST_NEW_LINE
;
751 swrast
->InvalidateTriangleMask
= _SWRAST_NEW_TRIANGLE
;
753 swrast
->Point
= _swrast_validate_point
;
754 swrast
->Line
= _swrast_validate_line
;
755 swrast
->Triangle
= _swrast_validate_triangle
;
756 swrast
->InvalidateState
= _swrast_sleep
;
757 swrast
->BlendFunc
= _swrast_validate_blend_func
;
759 swrast
->AllowVertexFog
= GL_TRUE
;
760 swrast
->AllowPixelFog
= GL_TRUE
;
762 swrast
->Driver
.SpanRenderStart
= _swrast_span_render_start
;
763 swrast
->Driver
.SpanRenderFinish
= _swrast_span_render_finish
;
765 for (i
= 0; i
< ARRAY_SIZE(swrast
->TextureSample
); i
++)
766 swrast
->TextureSample
[i
] = NULL
;
768 /* SpanArrays is global and shared by all SWspan instances. However, when
769 * using multiple threads, it is necessary to have one SpanArrays instance
772 swrast
->SpanArrays
= malloc(maxThreads
* sizeof(SWspanarrays
));
773 if (!swrast
->SpanArrays
) {
777 for(i
= 0; i
< maxThreads
; i
++) {
778 swrast
->SpanArrays
[i
].ChanType
= CHAN_TYPE
;
779 #if CHAN_TYPE == GL_UNSIGNED_BYTE
780 swrast
->SpanArrays
[i
].rgba
= swrast
->SpanArrays
[i
].rgba8
;
781 #elif CHAN_TYPE == GL_UNSIGNED_SHORT
782 swrast
->SpanArrays
[i
].rgba
= swrast
->SpanArrays
[i
].rgba16
;
784 swrast
->SpanArrays
[i
].rgba
= swrast
->SpanArrays
[i
].attribs
[VARYING_SLOT_COL0
];
788 /* init point span buffer */
789 swrast
->PointSpan
.primitive
= GL_POINT
;
790 swrast
->PointSpan
.end
= 0;
791 swrast
->PointSpan
.facing
= 0;
792 swrast
->PointSpan
.array
= swrast
->SpanArrays
;
794 init_program_native_limits(&ctx
->Const
.Program
[MESA_SHADER_VERTEX
]);
795 init_program_native_limits(&ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
]);
796 init_program_native_limits(&ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
]);
798 ctx
->swrast_context
= swrast
;
800 swrast
->stencil_temp
.buf1
= malloc(SWRAST_MAX_WIDTH
* sizeof(GLubyte
));
801 swrast
->stencil_temp
.buf2
= malloc(SWRAST_MAX_WIDTH
* sizeof(GLubyte
));
802 swrast
->stencil_temp
.buf3
= malloc(SWRAST_MAX_WIDTH
* sizeof(GLubyte
));
803 swrast
->stencil_temp
.buf4
= malloc(SWRAST_MAX_WIDTH
* sizeof(GLubyte
));
805 if (!swrast
->stencil_temp
.buf1
||
806 !swrast
->stencil_temp
.buf2
||
807 !swrast
->stencil_temp
.buf3
||
808 !swrast
->stencil_temp
.buf4
) {
809 _swrast_DestroyContext(ctx
);
817 _swrast_DestroyContext( struct gl_context
*ctx
)
819 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
822 _mesa_debug(ctx
, "_swrast_DestroyContext\n");
825 free( swrast
->SpanArrays
);
826 free( swrast
->ZoomedArrays
);
827 free( swrast
->TexelBuffer
);
829 free(swrast
->stencil_temp
.buf1
);
830 free(swrast
->stencil_temp
.buf2
);
831 free(swrast
->stencil_temp
.buf3
);
832 free(swrast
->stencil_temp
.buf4
);
836 ctx
->swrast_context
= 0;
840 struct swrast_device_driver
*
841 _swrast_GetDeviceDriverReference( struct gl_context
*ctx
)
843 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
844 return &swrast
->Driver
;
848 _swrast_flush( struct gl_context
*ctx
)
850 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
851 /* flush any pending fragments from rendering points */
852 if (swrast
->PointSpan
.end
> 0) {
853 _swrast_write_rgba_span(ctx
, &(swrast
->PointSpan
));
854 swrast
->PointSpan
.end
= 0;
859 _swrast_render_primitive( struct gl_context
*ctx
, GLenum prim
)
861 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
862 if (swrast
->Primitive
== GL_POINTS
&& prim
!= GL_POINTS
) {
865 swrast
->Primitive
= prim
;
869 /** called via swrast->Driver.SpanRenderStart() */
871 _swrast_span_render_start(struct gl_context
*ctx
)
873 _swrast_map_textures(ctx
);
874 _swrast_map_renderbuffers(ctx
);
878 /** called via swrast->Driver.SpanRenderFinish() */
880 _swrast_span_render_finish(struct gl_context
*ctx
)
882 _swrast_unmap_textures(ctx
);
883 _swrast_unmap_renderbuffers(ctx
);
888 _swrast_render_start( struct gl_context
*ctx
)
890 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
891 if (swrast
->Driver
.SpanRenderStart
)
892 swrast
->Driver
.SpanRenderStart( ctx
);
893 swrast
->PointSpan
.end
= 0;
897 _swrast_render_finish( struct gl_context
*ctx
)
899 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
900 struct gl_query_object
*query
= ctx
->Query
.CurrentOcclusionObject
;
904 if (swrast
->Driver
.SpanRenderFinish
)
905 swrast
->Driver
.SpanRenderFinish( ctx
);
907 if (query
&& (query
->Target
== GL_ANY_SAMPLES_PASSED
||
908 query
->Target
== GL_ANY_SAMPLES_PASSED_CONSERVATIVE
))
909 query
->Result
= !!query
->Result
;
913 #define SWRAST_DEBUG_VERTICES 0
916 _swrast_print_vertex( struct gl_context
*ctx
, const SWvertex
*v
)
920 if (SWRAST_DEBUG_VERTICES
) {
921 _mesa_debug(ctx
, "win %f %f %f %f\n",
922 v
->attrib
[VARYING_SLOT_POS
][0],
923 v
->attrib
[VARYING_SLOT_POS
][1],
924 v
->attrib
[VARYING_SLOT_POS
][2],
925 v
->attrib
[VARYING_SLOT_POS
][3]);
927 for (i
= 0 ; i
< ctx
->Const
.MaxTextureCoordUnits
; i
++)
928 if (ctx
->Texture
.Unit
[i
]._Current
)
929 _mesa_debug(ctx
, "texcoord[%d] %f %f %f %f\n", i
,
930 v
->attrib
[VARYING_SLOT_TEX0
+ i
][0],
931 v
->attrib
[VARYING_SLOT_TEX0
+ i
][1],
932 v
->attrib
[VARYING_SLOT_TEX0
+ i
][2],
933 v
->attrib
[VARYING_SLOT_TEX0
+ i
][3]);
935 #if CHAN_TYPE == GL_FLOAT
936 _mesa_debug(ctx
, "color %f %f %f %f\n",
937 v
->color
[0], v
->color
[1], v
->color
[2], v
->color
[3]);
939 _mesa_debug(ctx
, "color %d %d %d %d\n",
940 v
->color
[0], v
->color
[1], v
->color
[2], v
->color
[3]);
942 _mesa_debug(ctx
, "spec %g %g %g %g\n",
943 v
->attrib
[VARYING_SLOT_COL1
][0],
944 v
->attrib
[VARYING_SLOT_COL1
][1],
945 v
->attrib
[VARYING_SLOT_COL1
][2],
946 v
->attrib
[VARYING_SLOT_COL1
][3]);
947 _mesa_debug(ctx
, "fog %f\n", v
->attrib
[VARYING_SLOT_FOGC
][0]);
948 _mesa_debug(ctx
, "index %f\n", v
->attrib
[VARYING_SLOT_CI
][0]);
949 _mesa_debug(ctx
, "pointsize %f\n", v
->pointSize
);
950 _mesa_debug(ctx
, "\n");