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/colormac.h"
31 #include "main/mtypes.h"
32 #include "main/samplerobj.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 (_swrast_use_fragment_program(ctx
)) {
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 _swrast_use_fragment_program(ctx
) ||
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 GLboolean use_fprog
= _swrast_use_fragment_program(ctx
);
224 const struct gl_fragment_program
*fprog
225 = ctx
->FragmentProgram
._Current
;
226 if (use_fprog
&& (fprog
->Base
.OutputsWritten
& (1 << FRAG_RESULT_DEPTH
))) {
227 /* Z comes from fragment program/shader */
228 swrast
->_DeferredTexture
= GL_FALSE
;
230 else if (use_fprog
&& fprog
->UsesKill
) {
231 swrast
->_DeferredTexture
= GL_FALSE
;
233 else if (ctx
->Query
.CurrentOcclusionObject
) {
234 /* occlusion query depends on shader discard/kill results */
235 swrast
->_DeferredTexture
= GL_FALSE
;
238 swrast
->_DeferredTexture
= GL_TRUE
;
245 * Update swrast->_FogColor and swrast->_FogEnable values.
248 _swrast_update_fog_state( struct gl_context
*ctx
)
250 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
251 const struct gl_fragment_program
*fp
= ctx
->FragmentProgram
._Current
;
253 assert(fp
== NULL
|| fp
->Base
.Target
== GL_FRAGMENT_PROGRAM_ARB
);
255 /* determine if fog is needed, and if so, which fog mode */
256 swrast
->_FogEnabled
= (!_swrast_use_fragment_program(ctx
) &&
262 * Update state for running fragment programs. Basically, load the
263 * program parameters with current state values.
266 _swrast_update_fragment_program(struct gl_context
*ctx
, GLbitfield newState
)
268 if (!_swrast_use_fragment_program(ctx
))
271 _mesa_load_state_parameters(ctx
,
272 ctx
->FragmentProgram
._Current
->Base
.Parameters
);
277 * See if we can do early diffuse+specular (primary+secondary) color
278 * add per vertex instead of per-fragment.
281 _swrast_update_specular_vertex_add(struct gl_context
*ctx
)
283 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
284 GLboolean separateSpecular
= ctx
->Fog
.ColorSumEnabled
||
285 (ctx
->Light
.Enabled
&&
286 ctx
->Light
.Model
.ColorControl
== GL_SEPARATE_SPECULAR_COLOR
);
288 swrast
->SpecularVertexAdd
= (separateSpecular
289 && ctx
->Texture
._EnabledUnits
== 0x0
290 && !_swrast_use_fragment_program(ctx
)
291 && !ctx
->ATIFragmentShader
._Enabled
);
295 #define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK | \
296 _NEW_PROGRAM_CONSTANTS | \
301 /* State referenced by _swrast_choose_triangle, _swrast_choose_line.
303 #define _SWRAST_NEW_TRIANGLE (_SWRAST_NEW_DERIVED | \
310 _SWRAST_NEW_RASTERMASK| \
313 _MESA_NEW_SEPARATE_SPECULAR)
315 #define _SWRAST_NEW_LINE (_SWRAST_NEW_DERIVED | \
322 _MESA_NEW_SEPARATE_SPECULAR)
324 #define _SWRAST_NEW_POINT (_SWRAST_NEW_DERIVED | \
330 _MESA_NEW_SEPARATE_SPECULAR)
332 #define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE
334 #define _SWRAST_NEW_TEXTURE_ENV_MODE _NEW_TEXTURE
336 #define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR
341 * Stub for swrast->Triangle to select a true triangle function
342 * after a state change.
345 _swrast_validate_triangle( struct gl_context
*ctx
,
350 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
352 _swrast_validate_derived( ctx
);
353 swrast
->choose_triangle( ctx
);
354 ASSERT(swrast
->Triangle
);
356 if (swrast
->SpecularVertexAdd
) {
357 /* separate specular color, but no texture */
358 swrast
->SpecTriangle
= swrast
->Triangle
;
359 swrast
->Triangle
= _swrast_add_spec_terms_triangle
;
362 swrast
->Triangle( ctx
, v0
, v1
, v2
);
366 * Called via swrast->Line. Examine current GL state and choose a software
367 * line routine. Then call it.
370 _swrast_validate_line( struct gl_context
*ctx
, const SWvertex
*v0
, const SWvertex
*v1
)
372 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
374 _swrast_validate_derived( ctx
);
375 swrast
->choose_line( ctx
);
376 ASSERT(swrast
->Line
);
378 if (swrast
->SpecularVertexAdd
) {
379 swrast
->SpecLine
= swrast
->Line
;
380 swrast
->Line
= _swrast_add_spec_terms_line
;
383 swrast
->Line( ctx
, v0
, v1
);
387 * Called via swrast->Point. Examine current GL state and choose a software
388 * point routine. Then call it.
391 _swrast_validate_point( struct gl_context
*ctx
, const SWvertex
*v0
)
393 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
395 _swrast_validate_derived( ctx
);
396 swrast
->choose_point( ctx
);
398 if (swrast
->SpecularVertexAdd
) {
399 swrast
->SpecPoint
= swrast
->Point
;
400 swrast
->Point
= _swrast_add_spec_terms_point
;
403 swrast
->Point( ctx
, v0
);
408 * Called via swrast->BlendFunc. Examine GL state to choose a blending
409 * function, then call it.
412 _swrast_validate_blend_func(struct gl_context
*ctx
, GLuint n
, const GLubyte mask
[],
413 GLvoid
*src
, const GLvoid
*dst
,
416 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
418 _swrast_validate_derived( ctx
); /* why is this needed? */
419 _swrast_choose_blend_func( ctx
, chanType
);
421 swrast
->BlendFunc( ctx
, n
, mask
, src
, dst
, chanType
);
425 _swrast_sleep( struct gl_context
*ctx
, GLbitfield new_state
)
427 (void) ctx
; (void) new_state
;
432 _swrast_invalidate_state( struct gl_context
*ctx
, GLbitfield new_state
)
434 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
437 swrast
->NewState
|= new_state
;
439 /* After 10 statechanges without any swrast functions being called,
440 * put the module to sleep.
442 if (++swrast
->StateChanges
> 10) {
443 swrast
->InvalidateState
= _swrast_sleep
;
444 swrast
->NewState
= ~0;
448 if (new_state
& swrast
->InvalidateTriangleMask
)
449 swrast
->Triangle
= _swrast_validate_triangle
;
451 if (new_state
& swrast
->InvalidateLineMask
)
452 swrast
->Line
= _swrast_validate_line
;
454 if (new_state
& swrast
->InvalidatePointMask
)
455 swrast
->Point
= _swrast_validate_point
;
457 if (new_state
& _SWRAST_NEW_BLEND_FUNC
)
458 swrast
->BlendFunc
= _swrast_validate_blend_func
;
460 if (new_state
& _SWRAST_NEW_TEXTURE_SAMPLE_FUNC
)
461 for (i
= 0 ; i
< ARRAY_SIZE(swrast
->TextureSample
); i
++)
462 swrast
->TextureSample
[i
] = NULL
;
467 _swrast_update_texture_samplers(struct gl_context
*ctx
)
469 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
473 return; /* pipe hack */
475 for (u
= 0; u
< ARRAY_SIZE(swrast
->TextureSample
); u
++) {
476 struct gl_texture_object
*tObj
= ctx
->Texture
.Unit
[u
]._Current
;
477 /* Note: If tObj is NULL, the sample function will be a simple
478 * function that just returns opaque black (0,0,0,1).
480 _mesa_update_fetch_functions(ctx
, u
);
481 swrast
->TextureSample
[u
] =
482 _swrast_choose_texture_sample_func(ctx
, tObj
,
483 _mesa_get_samplerobj(ctx
, u
));
489 * Update swrast->_ActiveAttribs, swrast->_NumActiveAttribs,
490 * swrast->_ActiveAtttribMask.
493 _swrast_update_active_attribs(struct gl_context
*ctx
)
495 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
496 GLbitfield64 attribsMask
;
499 * Compute _ActiveAttribsMask = which fragment attributes are needed.
501 if (_swrast_use_fragment_program(ctx
)) {
502 /* fragment program/shader */
503 attribsMask
= ctx
->FragmentProgram
._Current
->Base
.InputsRead
;
504 attribsMask
&= ~VARYING_BIT_POS
; /* WPOS is always handled specially */
506 else if (ctx
->ATIFragmentShader
._Enabled
) {
507 attribsMask
= ~0; /* XXX fix me */
513 #if CHAN_TYPE == GL_FLOAT
514 attribsMask
|= VARYING_BIT_COL0
;
517 if (ctx
->Fog
.ColorSumEnabled
||
518 (ctx
->Light
.Enabled
&&
519 ctx
->Light
.Model
.ColorControl
== GL_SEPARATE_SPECULAR_COLOR
)) {
520 attribsMask
|= VARYING_BIT_COL1
;
523 if (swrast
->_FogEnabled
)
524 attribsMask
|= VARYING_BIT_FOGC
;
526 attribsMask
|= (ctx
->Texture
._EnabledUnits
<< VARYING_SLOT_TEX0
);
529 swrast
->_ActiveAttribMask
= attribsMask
;
531 /* Update _ActiveAttribs[] list */
534 for (i
= 0; i
< VARYING_SLOT_MAX
; i
++) {
535 if (attribsMask
& BITFIELD64_BIT(i
)) {
536 swrast
->_ActiveAttribs
[num
++] = i
;
537 /* how should this attribute be interpolated? */
538 if (i
== VARYING_SLOT_COL0
|| i
== VARYING_SLOT_COL1
)
539 swrast
->_InterpMode
[i
] = ctx
->Light
.ShadeModel
;
541 swrast
->_InterpMode
[i
] = GL_SMOOTH
;
544 swrast
->_NumActiveAttribs
= num
;
550 _swrast_validate_derived( struct gl_context
*ctx
)
552 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
554 if (swrast
->NewState
) {
555 if (swrast
->NewState
& _NEW_POLYGON
)
556 _swrast_update_polygon( ctx
);
558 if (swrast
->NewState
& (_NEW_HINT
| _NEW_PROGRAM
))
559 _swrast_update_fog_hint( ctx
);
561 if (swrast
->NewState
& _SWRAST_NEW_TEXTURE_ENV_MODE
)
562 _swrast_update_texture_env( ctx
);
564 if (swrast
->NewState
& (_NEW_FOG
| _NEW_PROGRAM
))
565 _swrast_update_fog_state( ctx
);
567 if (swrast
->NewState
& (_NEW_PROGRAM_CONSTANTS
| _NEW_PROGRAM
))
568 _swrast_update_fragment_program( ctx
, swrast
->NewState
);
570 if (swrast
->NewState
& (_NEW_TEXTURE
| _NEW_PROGRAM
)) {
571 _swrast_update_texture_samplers( ctx
);
574 if (swrast
->NewState
& (_NEW_COLOR
| _NEW_PROGRAM
))
575 _swrast_update_deferred_texture(ctx
);
577 if (swrast
->NewState
& _SWRAST_NEW_RASTERMASK
)
578 _swrast_update_rasterflags( ctx
);
580 if (swrast
->NewState
& (_NEW_DEPTH
|
585 _swrast_update_active_attribs(ctx
);
587 if (swrast
->NewState
& (_NEW_FOG
|
591 _swrast_update_specular_vertex_add(ctx
);
593 swrast
->NewState
= 0;
594 swrast
->StateChanges
= 0;
595 swrast
->InvalidateState
= _swrast_invalidate_state
;
599 #define SWRAST_DEBUG 0
601 /* Public entrypoints: See also s_bitmap.c, etc.
604 _swrast_Quad( struct gl_context
*ctx
,
605 const SWvertex
*v0
, const SWvertex
*v1
,
606 const SWvertex
*v2
, const SWvertex
*v3
)
609 _mesa_debug(ctx
, "_swrast_Quad\n");
610 _swrast_print_vertex( ctx
, v0
);
611 _swrast_print_vertex( ctx
, v1
);
612 _swrast_print_vertex( ctx
, v2
);
613 _swrast_print_vertex( ctx
, v3
);
615 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v0
, v1
, v3
);
616 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v1
, v2
, v3
);
620 _swrast_Triangle( struct gl_context
*ctx
, const SWvertex
*v0
,
621 const SWvertex
*v1
, const SWvertex
*v2
)
624 _mesa_debug(ctx
, "_swrast_Triangle\n");
625 _swrast_print_vertex( ctx
, v0
);
626 _swrast_print_vertex( ctx
, v1
);
627 _swrast_print_vertex( ctx
, v2
);
629 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v0
, v1
, v2
);
633 _swrast_Line( struct gl_context
*ctx
, const SWvertex
*v0
, const SWvertex
*v1
)
636 _mesa_debug(ctx
, "_swrast_Line\n");
637 _swrast_print_vertex( ctx
, v0
);
638 _swrast_print_vertex( ctx
, v1
);
640 SWRAST_CONTEXT(ctx
)->Line( ctx
, v0
, v1
);
644 _swrast_Point( struct gl_context
*ctx
, const SWvertex
*v0
)
647 _mesa_debug(ctx
, "_swrast_Point\n");
648 _swrast_print_vertex( ctx
, v0
);
650 SWRAST_CONTEXT(ctx
)->Point( ctx
, v0
);
654 _swrast_InvalidateState( struct gl_context
*ctx
, GLbitfield new_state
)
657 _mesa_debug(ctx
, "_swrast_InvalidateState\n");
659 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, new_state
);
663 _swrast_ResetLineStipple( struct gl_context
*ctx
)
666 _mesa_debug(ctx
, "_swrast_ResetLineStipple\n");
668 SWRAST_CONTEXT(ctx
)->StippleCounter
= 0;
672 _swrast_SetFacing(struct gl_context
*ctx
, GLuint facing
)
674 SWRAST_CONTEXT(ctx
)->PointLineFacing
= facing
;
678 _swrast_allow_vertex_fog( struct gl_context
*ctx
, GLboolean value
)
681 _mesa_debug(ctx
, "_swrast_allow_vertex_fog %d\n", value
);
683 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, _NEW_HINT
);
684 SWRAST_CONTEXT(ctx
)->AllowVertexFog
= value
;
688 _swrast_allow_pixel_fog( struct gl_context
*ctx
, GLboolean value
)
691 _mesa_debug(ctx
, "_swrast_allow_pixel_fog %d\n", value
);
693 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, _NEW_HINT
);
694 SWRAST_CONTEXT(ctx
)->AllowPixelFog
= value
;
699 * Initialize native program limits by copying the logical limits.
700 * See comments in init_program_limits() in context.c
703 init_program_native_limits(struct gl_program_constants
*prog
)
705 prog
->MaxNativeInstructions
= prog
->MaxInstructions
;
706 prog
->MaxNativeAluInstructions
= prog
->MaxAluInstructions
;
707 prog
->MaxNativeTexInstructions
= prog
->MaxTexInstructions
;
708 prog
->MaxNativeTexIndirections
= prog
->MaxTexIndirections
;
709 prog
->MaxNativeAttribs
= prog
->MaxAttribs
;
710 prog
->MaxNativeTemps
= prog
->MaxTemps
;
711 prog
->MaxNativeAddressRegs
= prog
->MaxAddressRegs
;
712 prog
->MaxNativeParameters
= prog
->MaxParameters
;
717 _swrast_CreateContext( struct gl_context
*ctx
)
720 SWcontext
*swrast
= calloc(1, sizeof(SWcontext
));
722 const GLuint maxThreads
= omp_get_max_threads();
724 const GLuint maxThreads
= 1;
727 assert(ctx
->Const
.MaxViewportWidth
<= SWRAST_MAX_WIDTH
);
728 assert(ctx
->Const
.MaxViewportHeight
<= SWRAST_MAX_WIDTH
);
730 assert(ctx
->Const
.MaxRenderbufferSize
<= SWRAST_MAX_WIDTH
);
732 /* make sure largest texture image is <= SWRAST_MAX_WIDTH in size */
733 assert((1 << (ctx
->Const
.MaxTextureLevels
- 1)) <= SWRAST_MAX_WIDTH
);
734 assert((1 << (ctx
->Const
.MaxCubeTextureLevels
- 1)) <= SWRAST_MAX_WIDTH
);
735 assert((1 << (ctx
->Const
.Max3DTextureLevels
- 1)) <= SWRAST_MAX_WIDTH
);
737 assert(PROG_MAX_WIDTH
== SWRAST_MAX_WIDTH
);
740 _mesa_debug(ctx
, "_swrast_CreateContext\n");
746 swrast
->NewState
= ~0;
748 swrast
->choose_point
= _swrast_choose_point
;
749 swrast
->choose_line
= _swrast_choose_line
;
750 swrast
->choose_triangle
= _swrast_choose_triangle
;
752 swrast
->InvalidatePointMask
= _SWRAST_NEW_POINT
;
753 swrast
->InvalidateLineMask
= _SWRAST_NEW_LINE
;
754 swrast
->InvalidateTriangleMask
= _SWRAST_NEW_TRIANGLE
;
756 swrast
->Point
= _swrast_validate_point
;
757 swrast
->Line
= _swrast_validate_line
;
758 swrast
->Triangle
= _swrast_validate_triangle
;
759 swrast
->InvalidateState
= _swrast_sleep
;
760 swrast
->BlendFunc
= _swrast_validate_blend_func
;
762 swrast
->AllowVertexFog
= GL_TRUE
;
763 swrast
->AllowPixelFog
= GL_TRUE
;
765 swrast
->Driver
.SpanRenderStart
= _swrast_span_render_start
;
766 swrast
->Driver
.SpanRenderFinish
= _swrast_span_render_finish
;
768 for (i
= 0; i
< ARRAY_SIZE(swrast
->TextureSample
); i
++)
769 swrast
->TextureSample
[i
] = NULL
;
771 /* SpanArrays is global and shared by all SWspan instances. However, when
772 * using multiple threads, it is necessary to have one SpanArrays instance
775 swrast
->SpanArrays
= malloc(maxThreads
* sizeof(SWspanarrays
));
776 if (!swrast
->SpanArrays
) {
780 for(i
= 0; i
< maxThreads
; i
++) {
781 swrast
->SpanArrays
[i
].ChanType
= CHAN_TYPE
;
782 #if CHAN_TYPE == GL_UNSIGNED_BYTE
783 swrast
->SpanArrays
[i
].rgba
= swrast
->SpanArrays
[i
].rgba8
;
784 #elif CHAN_TYPE == GL_UNSIGNED_SHORT
785 swrast
->SpanArrays
[i
].rgba
= swrast
->SpanArrays
[i
].rgba16
;
787 swrast
->SpanArrays
[i
].rgba
= swrast
->SpanArrays
[i
].attribs
[VARYING_SLOT_COL0
];
791 /* init point span buffer */
792 swrast
->PointSpan
.primitive
= GL_POINT
;
793 swrast
->PointSpan
.end
= 0;
794 swrast
->PointSpan
.facing
= 0;
795 swrast
->PointSpan
.array
= swrast
->SpanArrays
;
797 init_program_native_limits(&ctx
->Const
.Program
[MESA_SHADER_VERTEX
]);
798 init_program_native_limits(&ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
]);
799 init_program_native_limits(&ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
]);
801 ctx
->swrast_context
= swrast
;
803 swrast
->stencil_temp
.buf1
= malloc(SWRAST_MAX_WIDTH
* sizeof(GLubyte
));
804 swrast
->stencil_temp
.buf2
= malloc(SWRAST_MAX_WIDTH
* sizeof(GLubyte
));
805 swrast
->stencil_temp
.buf3
= malloc(SWRAST_MAX_WIDTH
* sizeof(GLubyte
));
806 swrast
->stencil_temp
.buf4
= malloc(SWRAST_MAX_WIDTH
* sizeof(GLubyte
));
808 if (!swrast
->stencil_temp
.buf1
||
809 !swrast
->stencil_temp
.buf2
||
810 !swrast
->stencil_temp
.buf3
||
811 !swrast
->stencil_temp
.buf4
) {
812 _swrast_DestroyContext(ctx
);
820 _swrast_DestroyContext( struct gl_context
*ctx
)
822 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
825 _mesa_debug(ctx
, "_swrast_DestroyContext\n");
828 free( swrast
->SpanArrays
);
829 free( swrast
->ZoomedArrays
);
830 free( swrast
->TexelBuffer
);
832 free(swrast
->stencil_temp
.buf1
);
833 free(swrast
->stencil_temp
.buf2
);
834 free(swrast
->stencil_temp
.buf3
);
835 free(swrast
->stencil_temp
.buf4
);
839 ctx
->swrast_context
= 0;
843 struct swrast_device_driver
*
844 _swrast_GetDeviceDriverReference( struct gl_context
*ctx
)
846 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
847 return &swrast
->Driver
;
851 _swrast_flush( struct gl_context
*ctx
)
853 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
854 /* flush any pending fragments from rendering points */
855 if (swrast
->PointSpan
.end
> 0) {
856 _swrast_write_rgba_span(ctx
, &(swrast
->PointSpan
));
857 swrast
->PointSpan
.end
= 0;
862 _swrast_render_primitive( struct gl_context
*ctx
, GLenum prim
)
864 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
865 if (swrast
->Primitive
== GL_POINTS
&& prim
!= GL_POINTS
) {
868 swrast
->Primitive
= prim
;
872 /** called via swrast->Driver.SpanRenderStart() */
874 _swrast_span_render_start(struct gl_context
*ctx
)
876 _swrast_map_textures(ctx
);
877 _swrast_map_renderbuffers(ctx
);
881 /** called via swrast->Driver.SpanRenderFinish() */
883 _swrast_span_render_finish(struct gl_context
*ctx
)
885 _swrast_unmap_textures(ctx
);
886 _swrast_unmap_renderbuffers(ctx
);
891 _swrast_render_start( struct gl_context
*ctx
)
893 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
894 if (swrast
->Driver
.SpanRenderStart
)
895 swrast
->Driver
.SpanRenderStart( ctx
);
896 swrast
->PointSpan
.end
= 0;
900 _swrast_render_finish( struct gl_context
*ctx
)
902 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
906 if (swrast
->Driver
.SpanRenderFinish
)
907 swrast
->Driver
.SpanRenderFinish( ctx
);
911 #define SWRAST_DEBUG_VERTICES 0
914 _swrast_print_vertex( struct gl_context
*ctx
, const SWvertex
*v
)
918 if (SWRAST_DEBUG_VERTICES
) {
919 _mesa_debug(ctx
, "win %f %f %f %f\n",
920 v
->attrib
[VARYING_SLOT_POS
][0],
921 v
->attrib
[VARYING_SLOT_POS
][1],
922 v
->attrib
[VARYING_SLOT_POS
][2],
923 v
->attrib
[VARYING_SLOT_POS
][3]);
925 for (i
= 0 ; i
< ctx
->Const
.MaxTextureCoordUnits
; i
++)
926 if (ctx
->Texture
.Unit
[i
]._ReallyEnabled
)
927 _mesa_debug(ctx
, "texcoord[%d] %f %f %f %f\n", i
,
928 v
->attrib
[VARYING_SLOT_TEX0
+ i
][0],
929 v
->attrib
[VARYING_SLOT_TEX0
+ i
][1],
930 v
->attrib
[VARYING_SLOT_TEX0
+ i
][2],
931 v
->attrib
[VARYING_SLOT_TEX0
+ i
][3]);
933 #if CHAN_TYPE == GL_FLOAT
934 _mesa_debug(ctx
, "color %f %f %f %f\n",
935 v
->color
[0], v
->color
[1], v
->color
[2], v
->color
[3]);
937 _mesa_debug(ctx
, "color %d %d %d %d\n",
938 v
->color
[0], v
->color
[1], v
->color
[2], v
->color
[3]);
940 _mesa_debug(ctx
, "spec %g %g %g %g\n",
941 v
->attrib
[VARYING_SLOT_COL1
][0],
942 v
->attrib
[VARYING_SLOT_COL1
][1],
943 v
->attrib
[VARYING_SLOT_COL1
][2],
944 v
->attrib
[VARYING_SLOT_COL1
][3]);
945 _mesa_debug(ctx
, "fog %f\n", v
->attrib
[VARYING_SLOT_FOGC
][0]);
946 _mesa_debug(ctx
, "index %f\n", v
->attrib
[VARYING_SLOT_CI
][0]);
947 _mesa_debug(ctx
, "pointsize %f\n", v
->pointSize
);
948 _mesa_debug(ctx
, "\n");