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;
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
._LogicOpEnabled
) rasterMask
|= LOGIC_OP_BIT
;
76 if (ctx
->Texture
._EnabledUnits
) rasterMask
|= TEXTURE_BIT
;
77 if ( ctx
->Viewport
.X
< 0
78 || ctx
->Viewport
.X
+ ctx
->Viewport
.Width
> (GLint
) ctx
->DrawBuffer
->Width
79 || ctx
->Viewport
.Y
< 0
80 || ctx
->Viewport
.Y
+ ctx
->Viewport
.Height
> (GLint
) ctx
->DrawBuffer
->Height
) {
81 rasterMask
|= CLIP_BIT
;
84 if (ctx
->Query
.CurrentOcclusionObject
)
85 rasterMask
|= OCCLUSION_BIT
;
88 /* If we're not drawing to exactly one color buffer set the
89 * MULTI_DRAW_BIT flag. Also set it if we're drawing to no
90 * buffers or the RGBA or CI mask disables all writes.
92 if (ctx
->DrawBuffer
->_NumColorDrawBuffers
!= 1) {
93 /* more than one color buffer designated for writing (or zero buffers) */
94 rasterMask
|= MULTI_DRAW_BIT
;
97 for (i
= 0; i
< ctx
->Const
.MaxDrawBuffers
; i
++) {
98 if (ctx
->Color
.ColorMask
[i
][0] +
99 ctx
->Color
.ColorMask
[i
][1] +
100 ctx
->Color
.ColorMask
[i
][2] +
101 ctx
->Color
.ColorMask
[i
][3] == 0) {
102 rasterMask
|= MULTI_DRAW_BIT
; /* all RGBA channels disabled */
108 if (ctx
->FragmentProgram
._Current
) {
109 rasterMask
|= FRAGPROG_BIT
;
112 if (ctx
->ATIFragmentShader
._Enabled
) {
113 rasterMask
|= ATIFRAGSHADER_BIT
;
116 #if CHAN_TYPE == GL_FLOAT
117 if (ctx
->Color
.ClampFragmentColor
== GL_TRUE
) {
118 rasterMask
|= CLAMPING_BIT
;
122 SWRAST_CONTEXT(ctx
)->_RasterMask
= rasterMask
;
127 * Examine polygon cull state to compute the _BackfaceCullSign field.
128 * _BackfaceCullSign will be 0 if no culling, -1 if culling back-faces,
129 * and 1 if culling front-faces. The Polygon FrontFace state also
133 _swrast_update_polygon( GLcontext
*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( GLcontext
*ctx
)
171 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
172 swrast
->_PreferPixelFog
= (!swrast
->AllowVertexFog
||
173 ctx
->FragmentProgram
._Current
||
174 (ctx
->Hint
.Fog
== GL_NICEST
&&
175 swrast
->AllowPixelFog
));
181 * Update the swrast->_TextureCombinePrimary flag.
184 _swrast_update_texture_env( GLcontext
*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(GLcontext
*ctx
)
217 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
218 if (ctx
->Color
.AlphaEnabled
) {
219 /* alpha test depends on post-texture/shader colors */
220 swrast
->_DeferredTexture
= GL_FALSE
;
223 const struct gl_fragment_program
*fprog
224 = ctx
->FragmentProgram
._Current
;
225 if (fprog
&& (fprog
->Base
.OutputsWritten
& (1 << FRAG_RESULT_DEPTH
))) {
226 /* Z comes from fragment program/shader */
227 swrast
->_DeferredTexture
= GL_FALSE
;
229 else if (fprog
&& fprog
->UsesKill
) {
230 swrast
->_DeferredTexture
= GL_FALSE
;
232 else if (ctx
->Query
.CurrentOcclusionObject
) {
233 /* occlusion query depends on shader discard/kill results */
234 swrast
->_DeferredTexture
= GL_FALSE
;
237 swrast
->_DeferredTexture
= GL_TRUE
;
244 * Update swrast->_FogColor and swrast->_FogEnable values.
247 _swrast_update_fog_state( GLcontext
*ctx
)
249 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
250 const struct gl_fragment_program
*fp
= ctx
->FragmentProgram
._Current
;
252 /* determine if fog is needed, and if so, which fog mode */
253 swrast
->_FogEnabled
= GL_FALSE
;
254 if (fp
&& fp
->Base
.Target
== GL_FRAGMENT_PROGRAM_ARB
) {
255 if (fp
->FogOption
!= GL_NONE
) {
256 swrast
->_FogEnabled
= GL_TRUE
;
257 swrast
->_FogMode
= fp
->FogOption
;
260 else if (ctx
->Fog
.Enabled
) {
261 swrast
->_FogEnabled
= GL_TRUE
;
262 swrast
->_FogMode
= ctx
->Fog
.Mode
;
268 * Update state for running fragment programs. Basically, load the
269 * program parameters with current state values.
272 _swrast_update_fragment_program(GLcontext
*ctx
, GLbitfield newState
)
274 const struct gl_fragment_program
*fp
= ctx
->FragmentProgram
._Current
;
276 _mesa_load_state_parameters(ctx
, fp
->Base
.Parameters
);
282 * See if we can do early diffuse+specular (primary+secondary) color
283 * add per vertex instead of per-fragment.
286 _swrast_update_specular_vertex_add(GLcontext
*ctx
)
288 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
289 GLboolean separateSpecular
= ctx
->Fog
.ColorSumEnabled
||
290 (ctx
->Light
.Enabled
&&
291 ctx
->Light
.Model
.ColorControl
== GL_SEPARATE_SPECULAR_COLOR
);
293 swrast
->SpecularVertexAdd
= (separateSpecular
294 && ctx
->Texture
._EnabledUnits
== 0x0
295 && !ctx
->FragmentProgram
._Current
296 && !ctx
->ATIFragmentShader
._Enabled
);
300 #define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK | \
301 _NEW_PROGRAM_CONSTANTS | \
306 /* State referenced by _swrast_choose_triangle, _swrast_choose_line.
308 #define _SWRAST_NEW_TRIANGLE (_SWRAST_NEW_DERIVED | \
315 _SWRAST_NEW_RASTERMASK| \
318 _DD_NEW_SEPARATE_SPECULAR)
320 #define _SWRAST_NEW_LINE (_SWRAST_NEW_DERIVED | \
327 _DD_NEW_SEPARATE_SPECULAR)
329 #define _SWRAST_NEW_POINT (_SWRAST_NEW_DERIVED | \
335 _DD_NEW_SEPARATE_SPECULAR)
337 #define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE
339 #define _SWRAST_NEW_TEXTURE_ENV_MODE _NEW_TEXTURE
341 #define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR
346 * Stub for swrast->Triangle to select a true triangle function
347 * after a state change.
350 _swrast_validate_triangle( GLcontext
*ctx
,
355 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
357 _swrast_validate_derived( ctx
);
358 swrast
->choose_triangle( ctx
);
359 ASSERT(swrast
->Triangle
);
361 if (swrast
->SpecularVertexAdd
) {
362 /* separate specular color, but no texture */
363 swrast
->SpecTriangle
= swrast
->Triangle
;
364 swrast
->Triangle
= _swrast_add_spec_terms_triangle
;
367 swrast
->Triangle( ctx
, v0
, v1
, v2
);
371 * Called via swrast->Line. Examine current GL state and choose a software
372 * line routine. Then call it.
375 _swrast_validate_line( GLcontext
*ctx
, const SWvertex
*v0
, const SWvertex
*v1
)
377 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
379 _swrast_validate_derived( ctx
);
380 swrast
->choose_line( ctx
);
381 ASSERT(swrast
->Line
);
383 if (swrast
->SpecularVertexAdd
) {
384 swrast
->SpecLine
= swrast
->Line
;
385 swrast
->Line
= _swrast_add_spec_terms_line
;
388 swrast
->Line( ctx
, v0
, v1
);
392 * Called via swrast->Point. Examine current GL state and choose a software
393 * point routine. Then call it.
396 _swrast_validate_point( GLcontext
*ctx
, const SWvertex
*v0
)
398 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
400 _swrast_validate_derived( ctx
);
401 swrast
->choose_point( ctx
);
403 if (swrast
->SpecularVertexAdd
) {
404 swrast
->SpecPoint
= swrast
->Point
;
405 swrast
->Point
= _swrast_add_spec_terms_point
;
408 swrast
->Point( ctx
, v0
);
413 * Called via swrast->BlendFunc. Examine GL state to choose a blending
414 * function, then call it.
417 _swrast_validate_blend_func(GLcontext
*ctx
, GLuint n
, const GLubyte mask
[],
418 GLvoid
*src
, const GLvoid
*dst
,
421 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
423 _swrast_validate_derived( ctx
); /* why is this needed? */
424 _swrast_choose_blend_func( ctx
, chanType
);
426 swrast
->BlendFunc( ctx
, n
, mask
, src
, dst
, chanType
);
431 * Make sure we have texture image data for all the textures we may need
432 * for subsequent rendering.
435 _swrast_validate_texture_images(GLcontext
*ctx
)
437 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
440 if (!swrast
->ValidateTextureImage
|| !ctx
->Texture
._EnabledUnits
) {
441 /* no textures enabled, or no way to validate images! */
445 for (u
= 0; u
< ctx
->Const
.MaxTextureImageUnits
; u
++) {
446 if (ctx
->Texture
.Unit
[u
]._ReallyEnabled
) {
447 struct gl_texture_object
*texObj
= ctx
->Texture
.Unit
[u
]._Current
;
450 GLuint numFaces
= (texObj
->Target
== GL_TEXTURE_CUBE_MAP
) ? 6 : 1;
452 for (face
= 0; face
< numFaces
; face
++) {
454 for (lvl
= texObj
->BaseLevel
; lvl
<= texObj
->_MaxLevel
; lvl
++) {
455 struct gl_texture_image
*texImg
= texObj
->Image
[face
][lvl
];
456 if (texImg
&& !texImg
->Data
) {
457 swrast
->ValidateTextureImage(ctx
, texObj
, face
, lvl
);
458 ASSERT(texObj
->Image
[face
][lvl
]->Data
);
469 * Free the texture image data attached to all currently enabled
470 * textures. Meant to be called by device drivers when transitioning
471 * from software to hardware rendering.
474 _swrast_eject_texture_images(GLcontext
*ctx
)
478 if (!ctx
->Texture
._EnabledUnits
) {
479 /* no textures enabled */
483 for (u
= 0; u
< ctx
->Const
.MaxTextureImageUnits
; u
++) {
484 if (ctx
->Texture
.Unit
[u
]._ReallyEnabled
) {
485 struct gl_texture_object
*texObj
= ctx
->Texture
.Unit
[u
]._Current
;
488 GLuint numFaces
= (texObj
->Target
== GL_TEXTURE_CUBE_MAP
) ? 6 : 1;
490 for (face
= 0; face
< numFaces
; face
++) {
492 for (lvl
= texObj
->BaseLevel
; lvl
<= texObj
->_MaxLevel
; lvl
++) {
493 struct gl_texture_image
*texImg
= texObj
->Image
[face
][lvl
];
494 if (texImg
&& texImg
->Data
) {
495 _mesa_free_texmemory(texImg
->Data
);
508 _swrast_sleep( GLcontext
*ctx
, GLbitfield new_state
)
510 (void) ctx
; (void) new_state
;
515 _swrast_invalidate_state( GLcontext
*ctx
, GLbitfield new_state
)
517 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
520 swrast
->NewState
|= new_state
;
522 /* After 10 statechanges without any swrast functions being called,
523 * put the module to sleep.
525 if (++swrast
->StateChanges
> 10) {
526 swrast
->InvalidateState
= _swrast_sleep
;
527 swrast
->NewState
= ~0;
531 if (new_state
& swrast
->InvalidateTriangleMask
)
532 swrast
->Triangle
= _swrast_validate_triangle
;
534 if (new_state
& swrast
->InvalidateLineMask
)
535 swrast
->Line
= _swrast_validate_line
;
537 if (new_state
& swrast
->InvalidatePointMask
)
538 swrast
->Point
= _swrast_validate_point
;
540 if (new_state
& _SWRAST_NEW_BLEND_FUNC
)
541 swrast
->BlendFunc
= _swrast_validate_blend_func
;
543 if (new_state
& _SWRAST_NEW_TEXTURE_SAMPLE_FUNC
)
544 for (i
= 0 ; i
< ctx
->Const
.MaxTextureImageUnits
; i
++)
545 swrast
->TextureSample
[i
] = NULL
;
550 _swrast_update_texture_samplers(GLcontext
*ctx
)
552 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
556 return; /* pipe hack */
558 for (u
= 0; u
< ctx
->Const
.MaxTextureImageUnits
; u
++) {
559 const struct gl_texture_object
*tObj
= ctx
->Texture
.Unit
[u
]._Current
;
560 /* Note: If tObj is NULL, the sample function will be a simple
561 * function that just returns opaque black (0,0,0,1).
563 swrast
->TextureSample
[u
] = _swrast_choose_texture_sample_func(ctx
, tObj
);
569 * Update swrast->_ActiveAttribs, swrast->_NumActiveAttribs,
570 * swrast->_ActiveAtttribMask.
573 _swrast_update_active_attribs(GLcontext
*ctx
)
575 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
579 * Compute _ActiveAttribsMask = which fragment attributes are needed.
581 if (ctx
->FragmentProgram
._Current
) {
582 /* fragment program/shader */
583 attribsMask
= ctx
->FragmentProgram
._Current
->Base
.InputsRead
;
584 attribsMask
&= ~FRAG_BIT_WPOS
; /* WPOS is always handled specially */
586 else if (ctx
->ATIFragmentShader
._Enabled
) {
587 attribsMask
= ~0; /* XXX fix me */
593 #if CHAN_TYPE == GL_FLOAT
594 attribsMask
|= FRAG_BIT_COL0
;
597 if (ctx
->Fog
.ColorSumEnabled
||
598 (ctx
->Light
.Enabled
&&
599 ctx
->Light
.Model
.ColorControl
== GL_SEPARATE_SPECULAR_COLOR
)) {
600 attribsMask
|= FRAG_BIT_COL1
;
603 if (swrast
->_FogEnabled
)
604 attribsMask
|= FRAG_BIT_FOGC
;
606 attribsMask
|= (ctx
->Texture
._EnabledUnits
<< FRAG_ATTRIB_TEX0
);
609 swrast
->_ActiveAttribMask
= attribsMask
;
611 /* Update _ActiveAttribs[] list */
614 for (i
= 0; i
< FRAG_ATTRIB_MAX
; i
++) {
615 if (attribsMask
& (1 << i
)) {
616 swrast
->_ActiveAttribs
[num
++] = i
;
617 /* how should this attribute be interpolated? */
618 if (i
== FRAG_ATTRIB_COL0
|| i
== FRAG_ATTRIB_COL1
)
619 swrast
->_InterpMode
[i
] = ctx
->Light
.ShadeModel
;
621 swrast
->_InterpMode
[i
] = GL_SMOOTH
;
624 swrast
->_NumActiveAttribs
= num
;
630 _swrast_validate_derived( GLcontext
*ctx
)
632 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
634 if (swrast
->NewState
) {
635 if (swrast
->NewState
& _NEW_POLYGON
)
636 _swrast_update_polygon( ctx
);
638 if (swrast
->NewState
& (_NEW_HINT
| _NEW_PROGRAM
))
639 _swrast_update_fog_hint( ctx
);
641 if (swrast
->NewState
& _SWRAST_NEW_TEXTURE_ENV_MODE
)
642 _swrast_update_texture_env( ctx
);
644 if (swrast
->NewState
& (_NEW_FOG
| _NEW_PROGRAM
))
645 _swrast_update_fog_state( ctx
);
647 if (swrast
->NewState
& (_NEW_PROGRAM_CONSTANTS
| _NEW_PROGRAM
))
648 _swrast_update_fragment_program( ctx
, swrast
->NewState
);
650 if (swrast
->NewState
& (_NEW_TEXTURE
| _NEW_PROGRAM
)) {
651 _swrast_update_texture_samplers( ctx
);
652 _swrast_validate_texture_images(ctx
);
655 if (swrast
->NewState
& (_NEW_COLOR
| _NEW_PROGRAM
))
656 _swrast_update_deferred_texture(ctx
);
658 if (swrast
->NewState
& _SWRAST_NEW_RASTERMASK
)
659 _swrast_update_rasterflags( ctx
);
661 if (swrast
->NewState
& (_NEW_DEPTH
|
666 _swrast_update_active_attribs(ctx
);
668 if (swrast
->NewState
& (_NEW_FOG
|
672 _swrast_update_specular_vertex_add(ctx
);
674 swrast
->NewState
= 0;
675 swrast
->StateChanges
= 0;
676 swrast
->InvalidateState
= _swrast_invalidate_state
;
680 #define SWRAST_DEBUG 0
682 /* Public entrypoints: See also s_accum.c, s_bitmap.c, etc.
685 _swrast_Quad( GLcontext
*ctx
,
686 const SWvertex
*v0
, const SWvertex
*v1
,
687 const SWvertex
*v2
, const SWvertex
*v3
)
690 _mesa_debug(ctx
, "_swrast_Quad\n");
691 _swrast_print_vertex( ctx
, v0
);
692 _swrast_print_vertex( ctx
, v1
);
693 _swrast_print_vertex( ctx
, v2
);
694 _swrast_print_vertex( ctx
, v3
);
696 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v0
, v1
, v3
);
697 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v1
, v2
, v3
);
701 _swrast_Triangle( GLcontext
*ctx
, const SWvertex
*v0
,
702 const SWvertex
*v1
, const SWvertex
*v2
)
705 _mesa_debug(ctx
, "_swrast_Triangle\n");
706 _swrast_print_vertex( ctx
, v0
);
707 _swrast_print_vertex( ctx
, v1
);
708 _swrast_print_vertex( ctx
, v2
);
710 SWRAST_CONTEXT(ctx
)->Triangle( ctx
, v0
, v1
, v2
);
714 _swrast_Line( GLcontext
*ctx
, const SWvertex
*v0
, const SWvertex
*v1
)
717 _mesa_debug(ctx
, "_swrast_Line\n");
718 _swrast_print_vertex( ctx
, v0
);
719 _swrast_print_vertex( ctx
, v1
);
721 SWRAST_CONTEXT(ctx
)->Line( ctx
, v0
, v1
);
725 _swrast_Point( GLcontext
*ctx
, const SWvertex
*v0
)
728 _mesa_debug(ctx
, "_swrast_Point\n");
729 _swrast_print_vertex( ctx
, v0
);
731 SWRAST_CONTEXT(ctx
)->Point( ctx
, v0
);
735 _swrast_InvalidateState( GLcontext
*ctx
, GLbitfield new_state
)
738 _mesa_debug(ctx
, "_swrast_InvalidateState\n");
740 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, new_state
);
744 _swrast_ResetLineStipple( GLcontext
*ctx
)
747 _mesa_debug(ctx
, "_swrast_ResetLineStipple\n");
749 SWRAST_CONTEXT(ctx
)->StippleCounter
= 0;
753 _swrast_SetFacing(GLcontext
*ctx
, GLuint facing
)
755 SWRAST_CONTEXT(ctx
)->PointLineFacing
= facing
;
759 _swrast_allow_vertex_fog( GLcontext
*ctx
, GLboolean value
)
762 _mesa_debug(ctx
, "_swrast_allow_vertex_fog %d\n", value
);
764 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, _NEW_HINT
);
765 SWRAST_CONTEXT(ctx
)->AllowVertexFog
= value
;
769 _swrast_allow_pixel_fog( GLcontext
*ctx
, GLboolean value
)
772 _mesa_debug(ctx
, "_swrast_allow_pixel_fog %d\n", value
);
774 SWRAST_CONTEXT(ctx
)->InvalidateState( ctx
, _NEW_HINT
);
775 SWRAST_CONTEXT(ctx
)->AllowPixelFog
= value
;
780 _swrast_CreateContext( GLcontext
*ctx
)
783 SWcontext
*swrast
= (SWcontext
*)CALLOC(sizeof(SWcontext
));
786 _mesa_debug(ctx
, "_swrast_CreateContext\n");
792 swrast
->NewState
= ~0;
794 swrast
->choose_point
= _swrast_choose_point
;
795 swrast
->choose_line
= _swrast_choose_line
;
796 swrast
->choose_triangle
= _swrast_choose_triangle
;
798 swrast
->InvalidatePointMask
= _SWRAST_NEW_POINT
;
799 swrast
->InvalidateLineMask
= _SWRAST_NEW_LINE
;
800 swrast
->InvalidateTriangleMask
= _SWRAST_NEW_TRIANGLE
;
802 swrast
->Point
= _swrast_validate_point
;
803 swrast
->Line
= _swrast_validate_line
;
804 swrast
->Triangle
= _swrast_validate_triangle
;
805 swrast
->InvalidateState
= _swrast_sleep
;
806 swrast
->BlendFunc
= _swrast_validate_blend_func
;
808 swrast
->AllowVertexFog
= GL_TRUE
;
809 swrast
->AllowPixelFog
= GL_TRUE
;
811 /* Optimized Accum buffer */
812 swrast
->_IntegerAccumMode
= GL_FALSE
;
813 swrast
->_IntegerAccumScaler
= 0.0;
815 for (i
= 0; i
< MAX_TEXTURE_IMAGE_UNITS
; i
++)
816 swrast
->TextureSample
[i
] = NULL
;
818 swrast
->SpanArrays
= MALLOC_STRUCT(sw_span_arrays
);
819 if (!swrast
->SpanArrays
) {
823 swrast
->SpanArrays
->ChanType
= CHAN_TYPE
;
824 #if CHAN_TYPE == GL_UNSIGNED_BYTE
825 swrast
->SpanArrays
->rgba
= swrast
->SpanArrays
->rgba8
;
826 #elif CHAN_TYPE == GL_UNSIGNED_SHORT
827 swrast
->SpanArrays
->rgba
= swrast
->SpanArrays
->rgba16
;
829 swrast
->SpanArrays
->rgba
= swrast
->SpanArrays
->attribs
[FRAG_ATTRIB_COL0
];
832 /* init point span buffer */
833 swrast
->PointSpan
.primitive
= GL_POINT
;
834 swrast
->PointSpan
.end
= 0;
835 swrast
->PointSpan
.facing
= 0;
836 swrast
->PointSpan
.array
= swrast
->SpanArrays
;
838 swrast
->TexelBuffer
= (GLfloat
*) MALLOC(ctx
->Const
.MaxTextureImageUnits
*
839 MAX_WIDTH
* 4 * sizeof(GLfloat
));
840 if (!swrast
->TexelBuffer
) {
841 FREE(swrast
->SpanArrays
);
846 ctx
->swrast_context
= swrast
;
852 _swrast_DestroyContext( GLcontext
*ctx
)
854 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
857 _mesa_debug(ctx
, "_swrast_DestroyContext\n");
860 FREE( swrast
->SpanArrays
);
861 if (swrast
->ZoomedArrays
)
862 FREE( swrast
->ZoomedArrays
);
863 FREE( swrast
->TexelBuffer
);
866 ctx
->swrast_context
= 0;
870 struct swrast_device_driver
*
871 _swrast_GetDeviceDriverReference( GLcontext
*ctx
)
873 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
874 return &swrast
->Driver
;
878 _swrast_flush( GLcontext
*ctx
)
880 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
881 /* flush any pending fragments from rendering points */
882 if (swrast
->PointSpan
.end
> 0) {
883 _swrast_write_rgba_span(ctx
, &(swrast
->PointSpan
));
884 swrast
->PointSpan
.end
= 0;
889 _swrast_render_primitive( GLcontext
*ctx
, GLenum prim
)
891 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
892 if (swrast
->Primitive
== GL_POINTS
&& prim
!= GL_POINTS
) {
895 swrast
->Primitive
= prim
;
900 _swrast_render_start( GLcontext
*ctx
)
902 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
903 if (swrast
->Driver
.SpanRenderStart
)
904 swrast
->Driver
.SpanRenderStart( ctx
);
905 swrast
->PointSpan
.end
= 0;
909 _swrast_render_finish( GLcontext
*ctx
)
911 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
912 if (swrast
->Driver
.SpanRenderFinish
)
913 swrast
->Driver
.SpanRenderFinish( ctx
);
919 #define SWRAST_DEBUG_VERTICES 0
922 _swrast_print_vertex( GLcontext
*ctx
, const SWvertex
*v
)
926 if (SWRAST_DEBUG_VERTICES
) {
927 _mesa_debug(ctx
, "win %f %f %f %f\n",
928 v
->attrib
[FRAG_ATTRIB_WPOS
][0],
929 v
->attrib
[FRAG_ATTRIB_WPOS
][1],
930 v
->attrib
[FRAG_ATTRIB_WPOS
][2],
931 v
->attrib
[FRAG_ATTRIB_WPOS
][3]);
933 for (i
= 0 ; i
< ctx
->Const
.MaxTextureCoordUnits
; i
++)
934 if (ctx
->Texture
.Unit
[i
]._ReallyEnabled
)
935 _mesa_debug(ctx
, "texcoord[%d] %f %f %f %f\n", i
,
936 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][0],
937 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][1],
938 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][2],
939 v
->attrib
[FRAG_ATTRIB_TEX0
+ i
][3]);
941 #if CHAN_TYPE == GL_FLOAT
942 _mesa_debug(ctx
, "color %f %f %f %f\n",
943 v
->color
[0], v
->color
[1], v
->color
[2], v
->color
[3]);
945 _mesa_debug(ctx
, "color %d %d %d %d\n",
946 v
->color
[0], v
->color
[1], v
->color
[2], v
->color
[3]);
948 _mesa_debug(ctx
, "spec %g %g %g %g\n",
949 v
->attrib
[FRAG_ATTRIB_COL1
][0],
950 v
->attrib
[FRAG_ATTRIB_COL1
][1],
951 v
->attrib
[FRAG_ATTRIB_COL1
][2],
952 v
->attrib
[FRAG_ATTRIB_COL1
][3]);
953 _mesa_debug(ctx
, "fog %f\n", v
->attrib
[FRAG_ATTRIB_FOGC
][0]);
954 _mesa_debug(ctx
, "index %d\n", v
->attrib
[FRAG_ATTRIB_CI
][0]);
955 _mesa_debug(ctx
, "pointsize %f\n", v
->pointSize
);
956 _mesa_debug(ctx
, "\n");