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/context.h"
32 #include "main/colormac.h"
33 #include "main/mtypes.h"
34 #include "main/teximage.h"
35 #include "shader/prog_parameter.h"
36 #include "shader/prog_statevars.h"
39 #include "s_context.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( GLcontext
*ctx
)
56 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
57 GLbitfield rasterMask
= 0;
59 if (ctx
->Color
.AlphaEnabled
) rasterMask
|= ALPHATEST_BIT
;
60 if (ctx
->Color
.BlendEnabled
) rasterMask
|= BLEND_BIT
;
61 if (ctx
->Depth
.Test
) rasterMask
|= DEPTH_BIT
;
62 if (swrast
->_FogEnabled
) rasterMask
|= FOG_BIT
;
63 if (ctx
->Scissor
.Enabled
) rasterMask
|= CLIP_BIT
;
64 if (ctx
->Stencil
.Enabled
) rasterMask
|= STENCIL_BIT
;
65 if (ctx
->Visual
.rgbMode
) {
66 const GLuint colorMask
= *((GLuint
*) &ctx
->Color
.ColorMask
);
67 if (colorMask
!= 0xffffffff) rasterMask
|= MASKING_BIT
;
68 if (ctx
->Color
._LogicOpEnabled
) rasterMask
|= LOGIC_OP_BIT
;
69 if (ctx
->Texture
._EnabledUnits
) rasterMask
|= TEXTURE_BIT
;
72 if (ctx
->Color
.IndexMask
!= 0xffffffff) rasterMask
|= MASKING_BIT
;
73 if (ctx
->Color
.IndexLogicOpEnabled
) rasterMask
|= LOGIC_OP_BIT
;
76 if ( ctx
->Viewport
.X
< 0
77 || ctx
->Viewport
.X
+ ctx
->Viewport
.Width
> (GLint
) ctx
->DrawBuffer
->Width
78 || ctx
->Viewport
.Y
< 0
79 || ctx
->Viewport
.Y
+ ctx
->Viewport
.Height
> (GLint
) ctx
->DrawBuffer
->Height
) {
80 rasterMask
|= CLIP_BIT
;
83 if (ctx
->Query
.CurrentOcclusionObject
)
84 rasterMask
|= OCCLUSION_BIT
;
87 /* If we're not drawing to exactly one color buffer set the
88 * MULTI_DRAW_BIT flag. Also set it if we're drawing to no
89 * buffers or the RGBA or CI mask disables all writes.
91 if (ctx
->DrawBuffer
->_NumColorDrawBuffers
!= 1) {
92 /* more than one color buffer designated for writing (or zero buffers) */
93 rasterMask
|= MULTI_DRAW_BIT
;
95 else if (ctx
->Visual
.rgbMode
&& *((GLuint
*) ctx
->Color
.ColorMask
) == 0) {
96 rasterMask
|= MULTI_DRAW_BIT
; /* all RGBA channels disabled */
98 else if (!ctx
->Visual
.rgbMode
&& ctx
->Color
.IndexMask
==0) {
99 rasterMask
|= MULTI_DRAW_BIT
; /* all color index bits disabled */
102 if (ctx
->FragmentProgram
._Current
) {
103 rasterMask
|= FRAGPROG_BIT
;
106 if (ctx
->ATIFragmentShader
._Enabled
) {
107 rasterMask
|= ATIFRAGSHADER_BIT
;
110 #if CHAN_TYPE == GL_FLOAT
111 if (ctx
->Color
.ClampFragmentColor
== GL_TRUE
) {
112 rasterMask
|= CLAMPING_BIT
;
116 SWRAST_CONTEXT(ctx
)->_RasterMask
= rasterMask
;
121 * Examine polygon cull state to compute the _BackfaceCullSign field.
122 * _BackfaceCullSign will be 0 if no culling, -1 if culling back-faces,
123 * and 1 if culling front-faces. The Polygon FrontFace state also
127 _swrast_update_polygon( GLcontext
*ctx
)
129 GLfloat backface_sign
;
131 if (ctx
->Polygon
.CullFlag
) {
132 switch (ctx
->Polygon
.CullFaceMode
) {
134 backface_sign
= -1.0;
139 case GL_FRONT_AND_BACK
:
149 SWRAST_CONTEXT(ctx
)->_BackfaceCullSign
= backface_sign
;
151 /* This is for front/back-face determination, but not for culling */
152 SWRAST_CONTEXT(ctx
)->_BackfaceSign
153 = (ctx
->Polygon
.FrontFace
== GL_CW
) ? -1.0 : 1.0;
159 * Update the _PreferPixelFog field to indicate if we need to compute
160 * fog blend factors (from the fog coords) per-fragment.
163 _swrast_update_fog_hint( GLcontext
*ctx
)
165 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
166 swrast
->_PreferPixelFog
= (!swrast
->AllowVertexFog
||
167 ctx
->FragmentProgram
._Current
||
168 (ctx
->Hint
.Fog
== GL_NICEST
&&
169 swrast
->AllowPixelFog
));
175 * Update the swrast->_AnyTextureCombine flag.
178 _swrast_update_texture_env( GLcontext
*ctx
)
180 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
182 swrast
->_AnyTextureCombine
= GL_FALSE
;
183 for (i
= 0; i
< ctx
->Const
.MaxTextureUnits
; i
++) {
184 if (ctx
->Texture
.Unit
[i
].EnvMode
== GL_COMBINE_EXT
||
185 ctx
->Texture
.Unit
[i
].EnvMode
== GL_COMBINE4_NV
) {
186 swrast
->_AnyTextureCombine
= GL_TRUE
;
194 * Determine if we can defer texturing/shading until after Z/stencil
195 * testing. This potentially allows us to skip texturing/shading for
199 _swrast_update_deferred_texture(GLcontext
*ctx
)
201 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
202 if (ctx
->Color
.AlphaEnabled
) {
203 /* alpha test depends on post-texture/shader colors */
204 swrast
->_DeferredTexture
= GL_FALSE
;
207 const struct gl_fragment_program
*fprog
208 = ctx
->FragmentProgram
._Current
;
209 if (fprog
&& (fprog
->Base
.OutputsWritten
& (1 << FRAG_RESULT_DEPR
))) {
210 /* Z comes from fragment program/shader */
211 swrast
->_DeferredTexture
= GL_FALSE
;
213 else if (ctx
->Query
.CurrentOcclusionObject
) {
214 /* occlusion query depends on shader discard/kill results */
215 swrast
->_DeferredTexture
= GL_FALSE
;
218 swrast
->_DeferredTexture
= GL_TRUE
;
225 * Update swrast->_FogColor and swrast->_FogEnable values.
228 _swrast_update_fog_state( GLcontext
*ctx
)
230 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
231 const struct gl_fragment_program
*fp
= ctx
->FragmentProgram
._Current
;
233 /* determine if fog is needed, and if so, which fog mode */
234 swrast
->_FogEnabled
= GL_FALSE
;
235 if (fp
&& fp
->Base
.Target
== GL_FRAGMENT_PROGRAM_ARB
) {
236 if (fp
->FogOption
!= GL_NONE
) {
237 swrast
->_FogEnabled
= GL_TRUE
;
238 swrast
->_FogMode
= fp
->FogOption
;
241 else if (ctx
->Fog
.Enabled
) {
242 swrast
->_FogEnabled
= GL_TRUE
;
243 swrast
->_FogMode
= ctx
->Fog
.Mode
;
249 * Update state for running fragment programs. Basically, load the
250 * program parameters with current state values.
253 _swrast_update_fragment_program(GLcontext
*ctx
, GLbitfield newState
)
255 const struct gl_fragment_program
*fp
= ctx
->FragmentProgram
._Current
;
258 /* XXX Need a way to trigger the initial loading of parameters
259 * even when there's no recent state changes.
261 if (fp
->Base
.Parameters
->StateFlags
& newState
)
263 _mesa_load_state_parameters(ctx
, fp
->Base
.Parameters
);
269 #define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK | \
274 /* State referenced by _swrast_choose_triangle, _swrast_choose_line.
276 #define _SWRAST_NEW_TRIANGLE (_SWRAST_NEW_DERIVED | \
283 _SWRAST_NEW_RASTERMASK| \
286 _DD_NEW_SEPARATE_SPECULAR)
288 #define _SWRAST_NEW_LINE (_SWRAST_NEW_DERIVED | \
295 _DD_NEW_SEPARATE_SPECULAR)
297 #define _SWRAST_NEW_POINT (_SWRAST_NEW_DERIVED | \
303 _DD_NEW_SEPARATE_SPECULAR)
305 #define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE
307 #define _SWRAST_NEW_TEXTURE_ENV_MODE _NEW_TEXTURE
309 #define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR
314 * Stub for swrast->Triangle to select a true triangle function
315 * after a state change.
318 _swrast_validate_triangle( GLcontext
*ctx
,
323 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
325 _swrast_validate_derived( ctx
);
326 swrast
->choose_triangle( ctx
);
327 ASSERT(swrast
->Triangle
);
329 if (ctx
->Texture
._EnabledUnits
== 0
330 && NEED_SECONDARY_COLOR(ctx
)
331 && !ctx
->FragmentProgram
._Current
) {
332 /* separate specular color, but no texture */
333 swrast
->SpecTriangle
= swrast
->Triangle
;
334 swrast
->Triangle
= _swrast_add_spec_terms_triangle
;
337 swrast
->Triangle( ctx
, v0
, v1
, v2
);
341 * Called via swrast->Line. Examine current GL state and choose a software
342 * line routine. Then call it.
345 _swrast_validate_line( GLcontext
*ctx
, const SWvertex
*v0
, const SWvertex
*v1
)
347 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
349 _swrast_validate_derived( ctx
);
350 swrast
->choose_line( ctx
);
351 ASSERT(swrast
->Line
);
353 if (ctx
->Texture
._EnabledUnits
== 0
354 && NEED_SECONDARY_COLOR(ctx
)
355 && !ctx
->FragmentProgram
._Current
) {
356 swrast
->SpecLine
= swrast
->Line
;
357 swrast
->Line
= _swrast_add_spec_terms_line
;
360 swrast
->Line( ctx
, v0
, v1
);
364 * Called via swrast->Point. Examine current GL state and choose a software
365 * point routine. Then call it.
368 _swrast_validate_point( GLcontext
*ctx
, const SWvertex
*v0
)
370 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
372 _swrast_validate_derived( ctx
);
373 swrast
->choose_point( ctx
);
375 if (ctx
->Texture
._EnabledUnits
== 0
376 && NEED_SECONDARY_COLOR(ctx
)
377 && !ctx
->FragmentProgram
._Current
) {
378 swrast
->SpecPoint
= swrast
->Point
;
379 swrast
->Point
= _swrast_add_spec_terms_point
;
382 swrast
->Point( ctx
, v0
);
387 * Called via swrast->BlendFunc. Examine GL state to choose a blending
388 * function, then call it.
391 _swrast_validate_blend_func(GLcontext
*ctx
, GLuint n
, const GLubyte mask
[],
392 GLvoid
*src
, const GLvoid
*dst
,
395 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
397 _swrast_validate_derived( ctx
); /* why is this needed? */
398 _swrast_choose_blend_func( ctx
, chanType
);
400 swrast
->BlendFunc( ctx
, n
, mask
, src
, dst
, chanType
);
405 * Make sure we have texture image data for all the textures we may need
406 * for subsequent rendering.
409 _swrast_validate_texture_images(GLcontext
*ctx
)
411 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
414 if (!swrast
->ValidateTextureImage
|| !ctx
->Texture
._EnabledUnits
) {
415 /* no textures enabled, or no way to validate images! */
419 for (u
= 0; u
< ctx
->Const
.MaxTextureImageUnits
; u
++) {
420 if (ctx
->Texture
.Unit
[u
]._ReallyEnabled
) {
421 struct gl_texture_object
*texObj
= ctx
->Texture
.Unit
[u
]._Current
;
424 GLuint numFaces
= (texObj
->Target
== GL_TEXTURE_CUBE_MAP
) ? 6 : 1;
426 for (face
= 0; face
< numFaces
; face
++) {
428 for (lvl
= texObj
->BaseLevel
; lvl
<= texObj
->_MaxLevel
; lvl
++) {
429 struct gl_texture_image
*texImg
= texObj
->Image
[face
][lvl
];
430 if (texImg
&& !texImg
->Data
) {
431 swrast
->ValidateTextureImage(ctx
, texObj
, face
, lvl
);
432 ASSERT(texObj
->Image
[face
][lvl
]->Data
);
443 * Free the texture image data attached to all currently enabled
444 * textures. Meant to be called by device drivers when transitioning
445 * from software to hardware rendering.
448 _swrast_eject_texture_images(GLcontext
*ctx
)
452 if (!ctx
->Texture
._EnabledUnits
) {
453 /* no textures enabled */
457 for (u
= 0; u
< ctx
->Const
.MaxTextureImageUnits
; u
++) {
458 if (ctx
->Texture
.Unit
[u
]._ReallyEnabled
) {
459 struct gl_texture_object
*texObj
= ctx
->Texture
.Unit
[u
]._Current
;
462 GLuint numFaces
= (texObj
->Target
== GL_TEXTURE_CUBE_MAP
) ? 6 : 1;
464 for (face
= 0; face
< numFaces
; face
++) {
466 for (lvl
= texObj
->BaseLevel
; lvl
<= texObj
->_MaxLevel
; lvl
++) {
467 struct gl_texture_image
*texImg
= texObj
->Image
[face
][lvl
];
468 if (texImg
&& texImg
->Data
) {
469 _mesa_free_texmemory(texImg
->Data
);
482 _swrast_sleep( GLcontext
*ctx
, GLbitfield new_state
)
484 (void) ctx
; (void) new_state
;
489 _swrast_invalidate_state( GLcontext
*ctx
, GLbitfield new_state
)
491 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
494 swrast
->NewState
|= new_state
;
496 /* After 10 statechanges without any swrast functions being called,
497 * put the module to sleep.
499 if (++swrast
->StateChanges
> 10) {
500 swrast
->InvalidateState
= _swrast_sleep
;
501 swrast
->NewState
= ~0;
506 const struct gl_fragment_program
*fp
= ctx
->FragmentProgram
._Current
;
507 if (fp
&& (fp
->Base
.Parameters
->StateFlags
& new_state
)) {
508 _mesa_load_state_parameters(ctx
, fp
->Base
.Parameters
);
512 if (new_state
& swrast
->InvalidateTriangleMask
)
513 swrast
->Triangle
= _swrast_validate_triangle
;
515 if (new_state
& swrast
->InvalidateLineMask
)
516 swrast
->Line
= _swrast_validate_line
;
518 if (new_state
& swrast
->InvalidatePointMask
)
519 swrast
->Point
= _swrast_validate_point
;
521 if (new_state
& _SWRAST_NEW_BLEND_FUNC
)
522 swrast
->BlendFunc
= _swrast_validate_blend_func
;
524 if (new_state
& _SWRAST_NEW_TEXTURE_SAMPLE_FUNC
)
525 for (i
= 0 ; i
< ctx
->Const
.MaxTextureImageUnits
; i
++)
526 swrast
->TextureSample
[i
] = NULL
;
531 _swrast_update_texture_samplers(GLcontext
*ctx
)
533 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
537 return; /* pipe hack */
539 for (u
= 0; u
< ctx
->Const
.MaxTextureImageUnits
; u
++) {
540 const struct gl_texture_object
*tObj
= ctx
->Texture
.Unit
[u
]._Current
;
541 /* Note: If tObj is NULL, the sample function will be a simple
542 * function that just returns opaque black (0,0,0,1).
544 swrast
->TextureSample
[u
] = _swrast_choose_texture_sample_func(ctx
, tObj
);
550 * Update swrast->_ActiveAttribs, swrast->_NumActiveAttribs,
551 * swrast->_ActiveAtttribMask.
554 _swrast_update_active_attribs(GLcontext
*ctx
)
556 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
560 * Compute _ActiveAttribsMask = which fragment attributes are needed.
562 if (ctx
->FragmentProgram
._Current
) {
563 /* fragment program/shader */
564 attribsMask
= ctx
->FragmentProgram
._Current
->Base
.InputsRead
;
565 attribsMask
&= ~FRAG_BIT_WPOS
; /* WPOS is always handled specially */
567 else if (ctx
->ATIFragmentShader
._Enabled
) {
568 attribsMask
= ~0; /* XXX fix me */
574 #if CHAN_TYPE == GL_FLOAT
575 attribsMask
|= FRAG_BIT_COL0
;
578 if (ctx
->Fog
.ColorSumEnabled
||
579 (ctx
->Light
.Enabled
&&
580 ctx
->Light
.Model
.ColorControl
== GL_SEPARATE_SPECULAR_COLOR
)) {
581 attribsMask
|= FRAG_BIT_COL1
;
584 if (swrast
->_FogEnabled
)
585 attribsMask
|= FRAG_BIT_FOGC
;
587 attribsMask
|= (ctx
->Texture
._EnabledUnits
<< FRAG_ATTRIB_TEX0
);
590 swrast
->_ActiveAttribMask
= attribsMask
;
592 /* Update _ActiveAttribs[] list */
595 for (i
= 0; i
< FRAG_ATTRIB_MAX
; i
++) {
596 if (attribsMask
& (1 << i
)) {
597 swrast
->_ActiveAttribs
[num
++] = i
;
598 /* how should this attribute be interpolated? */
599 if (i
== FRAG_ATTRIB_COL0
|| i
== FRAG_ATTRIB_COL1
)
600 swrast
->_InterpMode
[i
] = ctx
->Light
.ShadeModel
;
602 swrast
->_InterpMode
[i
] = GL_SMOOTH
;
605 swrast
->_NumActiveAttribs
= num
;
611 _swrast_validate_derived( GLcontext
*ctx
)
613 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
615 if (swrast
->NewState
) {
616 if (swrast
->NewState
& _NEW_POLYGON
)
617 _swrast_update_polygon( ctx
);
619 if (swrast
->NewState
& (_NEW_HINT
| _NEW_PROGRAM
))
620 _swrast_update_fog_hint( ctx
);
622 if (swrast
->NewState
& _SWRAST_NEW_TEXTURE_ENV_MODE
)
623 _swrast_update_texture_env( ctx
);
625 if (swrast
->NewState
& (_NEW_FOG
| _NEW_PROGRAM
))
626 _swrast_update_fog_state( ctx
);
628 if (swrast
->NewState
& (_NEW_MODELVIEW
|
630 _NEW_TEXTURE_MATRIX
|
639 _swrast_update_fragment_program( ctx
, swrast
->NewState
);
641 if (swrast
->NewState
& (_NEW_TEXTURE
| _NEW_PROGRAM
)) {
642 _swrast_update_texture_samplers( ctx
);
643 _swrast_validate_texture_images(ctx
);
646 if (swrast
->NewState
& (_NEW_COLOR
| _NEW_PROGRAM
))
647 _swrast_update_deferred_texture(ctx
);
649 if (swrast
->NewState
& _SWRAST_NEW_RASTERMASK
)
650 _swrast_update_rasterflags( ctx
);
652 if (swrast
->NewState
& (_NEW_DEPTH
|
657 _swrast_update_active_attribs(ctx
);
659 swrast
->NewState
= 0;
660 swrast
->StateChanges
= 0;
661 swrast
->InvalidateState
= _swrast_invalidate_state
;
665 #define SWRAST_DEBUG 0
667 /* Public entrypoints: See also s_accum.c, s_bitmap.c, etc.
670 _swrast_Quad( GLcontext
*ctx
,
671 const SWvertex
*v0
, const SWvertex
*v1
,
672 const SWvertex
*v2
, const SWvertex
*v3
)
675 _mesa_debug(ctx
, "_swrast_Quad\n");
676 _swrast_print_vertex( ctx
, v0
);
677 _swrast_print_vertex( ctx
, v1
);
678 _swrast_print_vertex( ctx
, v2
);
679 _swrast_print_vertex( ctx
, v3
);
681 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v0
, v1
, v3
);
682 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v1
, v2
, v3
);
686 _swrast_Triangle( GLcontext
*ctx
, const SWvertex
*v0
,
687 const SWvertex
*v1
, const SWvertex
*v2
)
690 _mesa_debug(ctx
, "_swrast_Triangle\n");
691 _swrast_print_vertex( ctx
, v0
);
692 _swrast_print_vertex( ctx
, v1
);
693 _swrast_print_vertex( ctx
, v2
);
695 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v0
, v1
, v2
);
699 _swrast_Line( GLcontext
*ctx
, const SWvertex
*v0
, const SWvertex
*v1
)
702 _mesa_debug(ctx
, "_swrast_Line\n");
703 _swrast_print_vertex( ctx
, v0
);
704 _swrast_print_vertex( ctx
, v1
);
706 SWRAST_CONTEXT(ctx
)->Line( ctx
, v0
, v1
);
710 _swrast_Point( GLcontext
*ctx
, const SWvertex
*v0
)
713 _mesa_debug(ctx
, "_swrast_Point\n");
714 _swrast_print_vertex( ctx
, v0
);
716 SWRAST_CONTEXT(ctx
)->Point( ctx
, v0
);
720 _swrast_InvalidateState( GLcontext
*ctx
, GLbitfield new_state
)
723 _mesa_debug(ctx
, "_swrast_InvalidateState\n");
725 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, new_state
);
729 _swrast_ResetLineStipple( GLcontext
*ctx
)
732 _mesa_debug(ctx
, "_swrast_ResetLineStipple\n");
734 SWRAST_CONTEXT(ctx
)->StippleCounter
= 0;
738 _swrast_SetFacing(GLcontext
*ctx
, GLuint facing
)
740 SWRAST_CONTEXT(ctx
)->PointLineFacing
= facing
;
744 _swrast_allow_vertex_fog( GLcontext
*ctx
, GLboolean value
)
747 _mesa_debug(ctx
, "_swrast_allow_vertex_fog %d\n", value
);
749 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, _NEW_HINT
);
750 SWRAST_CONTEXT(ctx
)->AllowVertexFog
= value
;
754 _swrast_allow_pixel_fog( GLcontext
*ctx
, GLboolean value
)
757 _mesa_debug(ctx
, "_swrast_allow_pixel_fog %d\n", value
);
759 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, _NEW_HINT
);
760 SWRAST_CONTEXT(ctx
)->AllowPixelFog
= value
;
765 _swrast_CreateContext( GLcontext
*ctx
)
768 SWcontext
*swrast
= (SWcontext
*)CALLOC(sizeof(SWcontext
));
771 _mesa_debug(ctx
, "_swrast_CreateContext\n");
777 swrast
->NewState
= ~0;
779 swrast
->choose_point
= _swrast_choose_point
;
780 swrast
->choose_line
= _swrast_choose_line
;
781 swrast
->choose_triangle
= _swrast_choose_triangle
;
783 swrast
->InvalidatePointMask
= _SWRAST_NEW_POINT
;
784 swrast
->InvalidateLineMask
= _SWRAST_NEW_LINE
;
785 swrast
->InvalidateTriangleMask
= _SWRAST_NEW_TRIANGLE
;
787 swrast
->Point
= _swrast_validate_point
;
788 swrast
->Line
= _swrast_validate_line
;
789 swrast
->Triangle
= _swrast_validate_triangle
;
790 swrast
->InvalidateState
= _swrast_sleep
;
791 swrast
->BlendFunc
= _swrast_validate_blend_func
;
793 swrast
->AllowVertexFog
= GL_TRUE
;
794 swrast
->AllowPixelFog
= GL_TRUE
;
796 /* Optimized Accum buffer */
797 swrast
->_IntegerAccumMode
= GL_FALSE
;
798 swrast
->_IntegerAccumScaler
= 0.0;
800 for (i
= 0; i
< MAX_TEXTURE_IMAGE_UNITS
; i
++)
801 swrast
->TextureSample
[i
] = NULL
;
803 swrast
->SpanArrays
= MALLOC_STRUCT(sw_span_arrays
);
804 if (!swrast
->SpanArrays
) {
808 swrast
->SpanArrays
->ChanType
= CHAN_TYPE
;
809 #if CHAN_TYPE == GL_UNSIGNED_BYTE
810 swrast
->SpanArrays
->rgba
= swrast
->SpanArrays
->rgba8
;
811 #elif CHAN_TYPE == GL_UNSIGNED_SHORT
812 swrast
->SpanArrays
->rgba
= swrast
->SpanArrays
->rgba16
;
814 swrast
->SpanArrays
->rgba
= swrast
->SpanArrays
->attribs
[FRAG_ATTRIB_COL0
];
817 /* init point span buffer */
818 swrast
->PointSpan
.primitive
= GL_POINT
;
819 swrast
->PointSpan
.end
= 0;
820 swrast
->PointSpan
.facing
= 0;
821 swrast
->PointSpan
.array
= swrast
->SpanArrays
;
823 swrast
->TexelBuffer
= (GLchan
*) MALLOC(ctx
->Const
.MaxTextureImageUnits
*
824 MAX_WIDTH
* 4 * sizeof(GLchan
));
825 if (!swrast
->TexelBuffer
) {
826 FREE(swrast
->SpanArrays
);
831 ctx
->swrast_context
= swrast
;
837 _swrast_DestroyContext( GLcontext
*ctx
)
839 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
842 _mesa_debug(ctx
, "_swrast_DestroyContext\n");
845 FREE( swrast
->SpanArrays
);
846 if (swrast
->ZoomedArrays
)
847 FREE( swrast
->ZoomedArrays
);
848 FREE( swrast
->TexelBuffer
);
851 ctx
->swrast_context
= 0;
855 struct swrast_device_driver
*
856 _swrast_GetDeviceDriverReference( GLcontext
*ctx
)
858 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
859 return &swrast
->Driver
;
863 _swrast_flush( GLcontext
*ctx
)
865 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
866 /* flush any pending fragments from rendering points */
867 if (swrast
->PointSpan
.end
> 0) {
868 if (ctx
->Visual
.rgbMode
) {
869 _swrast_write_rgba_span(ctx
, &(swrast
->PointSpan
));
872 _swrast_write_index_span(ctx
, &(swrast
->PointSpan
));
874 swrast
->PointSpan
.end
= 0;
879 _swrast_render_primitive( GLcontext
*ctx
, GLenum prim
)
881 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
882 if (swrast
->Primitive
== GL_POINTS
&& prim
!= GL_POINTS
) {
885 swrast
->Primitive
= prim
;
890 _swrast_render_start( GLcontext
*ctx
)
892 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
893 if (swrast
->Driver
.SpanRenderStart
)
894 swrast
->Driver
.SpanRenderStart( ctx
);
895 swrast
->PointSpan
.end
= 0;
899 _swrast_render_finish( GLcontext
*ctx
)
901 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
902 if (swrast
->Driver
.SpanRenderFinish
)
903 swrast
->Driver
.SpanRenderFinish( ctx
);
909 #define SWRAST_DEBUG_VERTICES 0
912 _swrast_print_vertex( GLcontext
*ctx
, const SWvertex
*v
)
916 if (SWRAST_DEBUG_VERTICES
) {
917 _mesa_debug(ctx
, "win %f %f %f %f\n",
918 v
->attrib
[FRAG_ATTRIB_WPOS
][0],
919 v
->attrib
[FRAG_ATTRIB_WPOS
][1],
920 v
->attrib
[FRAG_ATTRIB_WPOS
][2],
921 v
->attrib
[FRAG_ATTRIB_WPOS
][3]);
923 for (i
= 0 ; i
< ctx
->Const
.MaxTextureCoordUnits
; i
++)
924 if (ctx
->Texture
.Unit
[i
]._ReallyEnabled
)
925 _mesa_debug(ctx
, "texcoord[%d] %f %f %f %f\n", i
,
926 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][0],
927 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][1],
928 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][2],
929 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][3]);
931 #if CHAN_TYPE == GL_FLOAT
932 _mesa_debug(ctx
, "color %f %f %f %f\n",
933 v
->color
[0], v
->color
[1], v
->color
[2], v
->color
[3]);
935 _mesa_debug(ctx
, "color %d %d %d %d\n",
936 v
->color
[0], v
->color
[1], v
->color
[2], v
->color
[3]);
938 _mesa_debug(ctx
, "spec %g %g %g %g\n",
939 v
->attrib
[FRAG_ATTRIB_COL1
][0],
940 v
->attrib
[FRAG_ATTRIB_COL1
][1],
941 v
->attrib
[FRAG_ATTRIB_COL1
][2],
942 v
->attrib
[FRAG_ATTRIB_COL1
][3]);
943 _mesa_debug(ctx
, "fog %f\n", v
->attrib
[FRAG_ATTRIB_FOGC
][0]);
944 _mesa_debug(ctx
, "index %d\n", v
->attrib
[FRAG_ATTRIB_CI
][0]);
945 _mesa_debug(ctx
, "pointsize %f\n", v
->pointSize
);
946 _mesa_debug(ctx
, "\n");