Synchronised line endinge with release branch

1 files changed, 906 insertions, 906 deletions

diff --git a/mesalib/src/mesa/swrast/s_context.c b/mesalib/src/mesa/swrast/s_context.c
index e65f6aa9d..df213357f 100644
--- a/mesalib/src/mesa/swrast/s_context.c
+++ b/mesalib/src/mesa/swrast/s_context.c
@@ -1,906 +1,906 @@
-/*

- * Mesa 3-D graphics library

- * Version:  7.1

- *

- * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.

- *

- * Permission is hereby granted, free of charge, to any person obtaining a

- * copy of this software and associated documentation files (the "Software"),

- * to deal in the Software without restriction, including without limitation

- * the rights to use, copy, modify, merge, publish, distribute, sublicense,

- * and/or sell copies of the Software, and to permit persons to whom the

- * Software is furnished to do so, subject to the following conditions:

- *

- * The above copyright notice and this permission notice shall be included

- * in all copies or substantial portions of the Software.

- *

- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

- *

- * Authors:

- *    Keith Whitwell <keith@tungstengraphics.com>

- *    Brian Paul

- */

-

-#include "main/imports.h"

-#include "main/bufferobj.h"

-#include "main/colormac.h"

-#include "main/mtypes.h"

-#include "main/teximage.h"

-#include "program/prog_parameter.h"

-#include "program/prog_statevars.h"

-#include "swrast.h"

-#include "s_blend.h"

-#include "s_context.h"

-#include "s_lines.h"

-#include "s_points.h"

-#include "s_span.h"

-#include "s_triangle.h"

-#include "s_texfilter.h"

-

-

-/**

- * Recompute the value of swrast->_RasterMask, etc. according to

- * the current context.  The _RasterMask field can be easily tested by

- * drivers to determine certain basic GL state (does the primitive need

- * stenciling, logic-op, fog, etc?).

- */

-static void

-_swrast_update_rasterflags( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   GLbitfield rasterMask = 0;

-   GLuint i;

-

-   if (ctx->Color.AlphaEnabled)           rasterMask |= ALPHATEST_BIT;

-   if (ctx->Color.BlendEnabled)           rasterMask |= BLEND_BIT;

-   if (ctx->Depth.Test)                   rasterMask |= DEPTH_BIT;

-   if (swrast->_FogEnabled)               rasterMask |= FOG_BIT;

-   if (ctx->Scissor.Enabled)              rasterMask |= CLIP_BIT;

-   if (ctx->Stencil._Enabled)             rasterMask |= STENCIL_BIT;

-   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {

-      if (!ctx->Color.ColorMask[i][0] ||

-          !ctx->Color.ColorMask[i][1] ||

-          !ctx->Color.ColorMask[i][2] ||

-          !ctx->Color.ColorMask[i][3]) {

-         rasterMask |= MASKING_BIT;

-         break;

-      }

-   }

-   if (ctx->Color._LogicOpEnabled)     rasterMask |= LOGIC_OP_BIT;

-   if (ctx->Texture._EnabledUnits)     rasterMask |= TEXTURE_BIT;

-   if (   ctx->Viewport.X < 0

-       || ctx->Viewport.X + ctx->Viewport.Width > (GLint) ctx->DrawBuffer->Width

-       || ctx->Viewport.Y < 0

-       || ctx->Viewport.Y + ctx->Viewport.Height > (GLint) ctx->DrawBuffer->Height) {

-      rasterMask |= CLIP_BIT;

-   }

-

-   if (ctx->Query.CurrentOcclusionObject)

-      rasterMask |= OCCLUSION_BIT;

-

-

-   /* If we're not drawing to exactly one color buffer set the

-    * MULTI_DRAW_BIT flag.  Also set it if we're drawing to no

-    * buffers or the RGBA or CI mask disables all writes.

-    */

-   if (ctx->DrawBuffer->_NumColorDrawBuffers != 1) {

-      /* more than one color buffer designated for writing (or zero buffers) */

-      rasterMask |= MULTI_DRAW_BIT;

-   }

-

-   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {

-      if (ctx->Color.ColorMask[i][0] +

-          ctx->Color.ColorMask[i][1] +

-          ctx->Color.ColorMask[i][2] +

-          ctx->Color.ColorMask[i][3] == 0) {

-         rasterMask |= MULTI_DRAW_BIT; /* all RGBA channels disabled */

-         break;

-      }

-   }

-

-

-   if (ctx->FragmentProgram._Current) {

-      rasterMask |= FRAGPROG_BIT;

-   }

-

-   if (ctx->ATIFragmentShader._Enabled) {

-      rasterMask |= ATIFRAGSHADER_BIT;

-   }

-

-#if CHAN_TYPE == GL_FLOAT

-   if (ctx->Color.ClampFragmentColor == GL_TRUE) {

-      rasterMask |= CLAMPING_BIT;

-   }

-#endif

-

-   SWRAST_CONTEXT(ctx)->_RasterMask = rasterMask;

-}

-

-

-/**

- * Examine polygon cull state to compute the _BackfaceCullSign field.

- * _BackfaceCullSign will be 0 if no culling, -1 if culling back-faces,

- * and 1 if culling front-faces.  The Polygon FrontFace state also

- * factors in.

- */

-static void

-_swrast_update_polygon( struct gl_context *ctx )

-{

-   GLfloat backface_sign;

-

-   if (ctx->Polygon.CullFlag) {

-      switch (ctx->Polygon.CullFaceMode) {

-      case GL_BACK:

-         backface_sign = -1.0F;

-	 break;

-      case GL_FRONT:

-         backface_sign = 1.0F;

-	 break;

-      case GL_FRONT_AND_BACK:

-         /* fallthrough */

-      default:

-	 backface_sign = 0.0F;

-      }

-   }

-   else {

-      backface_sign = 0.0F;

-   }

-

-   SWRAST_CONTEXT(ctx)->_BackfaceCullSign = backface_sign;

-

-   /* This is for front/back-face determination, but not for culling */

-   SWRAST_CONTEXT(ctx)->_BackfaceSign

-      = (ctx->Polygon.FrontFace == GL_CW) ? -1.0F : 1.0F;

-}

-

-

-

-/**

- * Update the _PreferPixelFog field to indicate if we need to compute

- * fog blend factors (from the fog coords) per-fragment.

- */

-static void

-_swrast_update_fog_hint( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   swrast->_PreferPixelFog = (!swrast->AllowVertexFog ||

-                              ctx->FragmentProgram._Current ||

-			      (ctx->Hint.Fog == GL_NICEST &&

-			       swrast->AllowPixelFog));

-}

-

-

-

-/**

- * Update the swrast->_TextureCombinePrimary flag.

- */

-static void

-_swrast_update_texture_env( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   GLuint i;

-

-   swrast->_TextureCombinePrimary = GL_FALSE;

-

-   for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {

-      const struct gl_tex_env_combine_state *combine =

-         ctx->Texture.Unit[i]._CurrentCombine;

-      GLuint term;

-      for (term = 0; term < combine->_NumArgsRGB; term++) {

-         if (combine->SourceRGB[term] == GL_PRIMARY_COLOR) {

-            swrast->_TextureCombinePrimary = GL_TRUE;

-            return;

-         }

-         if (combine->SourceA[term] == GL_PRIMARY_COLOR) {

-            swrast->_TextureCombinePrimary = GL_TRUE;

-            return;

-         }

-      }

-   }

-}

-

-

-/**

- * Determine if we can defer texturing/shading until after Z/stencil

- * testing.  This potentially allows us to skip texturing/shading for

- * lots of fragments.

- */

-static void

-_swrast_update_deferred_texture(struct gl_context *ctx)

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   if (ctx->Color.AlphaEnabled) {

-      /* alpha test depends on post-texture/shader colors */

-      swrast->_DeferredTexture = GL_FALSE;

-   }

-   else {

-      const struct gl_fragment_program *fprog

-         = ctx->FragmentProgram._Current;

-      if (fprog && (fprog->Base.OutputsWritten & (1 << FRAG_RESULT_DEPTH))) {

-         /* Z comes from fragment program/shader */

-         swrast->_DeferredTexture = GL_FALSE;

-      }

-      else if (fprog && fprog->UsesKill) {

-         swrast->_DeferredTexture = GL_FALSE;

-      }

-      else if (ctx->Query.CurrentOcclusionObject) {

-         /* occlusion query depends on shader discard/kill results */

-         swrast->_DeferredTexture = GL_FALSE;

-      }

-      else {

-         swrast->_DeferredTexture = GL_TRUE;

-      }

-   }

-}

-

-

-/**

- * Update swrast->_FogColor and swrast->_FogEnable values.

- */

-static void

-_swrast_update_fog_state( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;

-

-   assert((fp == NULL) || (fp->Base.Target == GL_FRAGMENT_PROGRAM_ARB));

-

-   /* determine if fog is needed, and if so, which fog mode */

-   swrast->_FogEnabled = (fp == NULL && ctx->Fog.Enabled);

-}

-

-

-/**

- * Update state for running fragment programs.  Basically, load the

- * program parameters with current state values.

- */

-static void

-_swrast_update_fragment_program(struct gl_context *ctx, GLbitfield newState)

-{

-   const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;

-   if (fp) {

-      _mesa_load_state_parameters(ctx, fp->Base.Parameters);

-   }

-}

-

-

-/**

- * See if we can do early diffuse+specular (primary+secondary) color

- * add per vertex instead of per-fragment.

- */

-static void

-_swrast_update_specular_vertex_add(struct gl_context *ctx)

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   GLboolean separateSpecular = ctx->Fog.ColorSumEnabled ||

-      (ctx->Light.Enabled &&

-       ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR);

-

-   swrast->SpecularVertexAdd = (separateSpecular

-                                && ctx->Texture._EnabledUnits == 0x0

-                                && !ctx->FragmentProgram._Current

-                                && !ctx->ATIFragmentShader._Enabled);

-}

-

-

-#define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK |	\

-                             _NEW_PROGRAM_CONSTANTS |   \

-			     _NEW_TEXTURE |		\

-			     _NEW_HINT |		\

-			     _NEW_POLYGON )

-

-/* State referenced by _swrast_choose_triangle, _swrast_choose_line.

- */

-#define _SWRAST_NEW_TRIANGLE (_SWRAST_NEW_DERIVED |		\

-			      _NEW_RENDERMODE|			\

-                              _NEW_POLYGON|			\

-                              _NEW_DEPTH|			\

-                              _NEW_STENCIL|			\

-                              _NEW_COLOR|			\

-                              _NEW_TEXTURE|			\

-                              _SWRAST_NEW_RASTERMASK|		\

-                              _NEW_LIGHT|			\

-                              _NEW_FOG |			\

-			      _DD_NEW_SEPARATE_SPECULAR)

-

-#define _SWRAST_NEW_LINE (_SWRAST_NEW_DERIVED |		\

-			  _NEW_RENDERMODE|		\

-                          _NEW_LINE|			\

-                          _NEW_TEXTURE|			\

-                          _NEW_LIGHT|			\

-                          _NEW_FOG|			\

-                          _NEW_DEPTH |			\

-                          _DD_NEW_SEPARATE_SPECULAR)

-

-#define _SWRAST_NEW_POINT (_SWRAST_NEW_DERIVED |	\

-			   _NEW_RENDERMODE |		\

-			   _NEW_POINT |			\

-			   _NEW_TEXTURE |		\

-			   _NEW_LIGHT |			\

-			   _NEW_FOG |			\

-                           _DD_NEW_SEPARATE_SPECULAR)

-

-#define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE

-

-#define _SWRAST_NEW_TEXTURE_ENV_MODE _NEW_TEXTURE

-

-#define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR

-

-

-

-/**

- * Stub for swrast->Triangle to select a true triangle function

- * after a state change.

- */

-static void

-_swrast_validate_triangle( struct gl_context *ctx,

-			   const SWvertex *v0,

-                           const SWvertex *v1,

-                           const SWvertex *v2 )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-

-   _swrast_validate_derived( ctx );

-   swrast->choose_triangle( ctx );

-   ASSERT(swrast->Triangle);

-

-   if (swrast->SpecularVertexAdd) {

-      /* separate specular color, but no texture */

-      swrast->SpecTriangle = swrast->Triangle;

-      swrast->Triangle = _swrast_add_spec_terms_triangle;

-   }

-

-   swrast->Triangle( ctx, v0, v1, v2 );

-}

-

-/**

- * Called via swrast->Line.  Examine current GL state and choose a software

- * line routine.  Then call it.

- */

-static void

-_swrast_validate_line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-

-   _swrast_validate_derived( ctx );

-   swrast->choose_line( ctx );

-   ASSERT(swrast->Line);

-

-   if (swrast->SpecularVertexAdd) {

-      swrast->SpecLine = swrast->Line;

-      swrast->Line = _swrast_add_spec_terms_line;

-   }

-

-   swrast->Line( ctx, v0, v1 );

-}

-

-/**

- * Called via swrast->Point.  Examine current GL state and choose a software

- * point routine.  Then call it.

- */

-static void

-_swrast_validate_point( struct gl_context *ctx, const SWvertex *v0 )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-

-   _swrast_validate_derived( ctx );

-   swrast->choose_point( ctx );

-

-   if (swrast->SpecularVertexAdd) {

-      swrast->SpecPoint = swrast->Point;

-      swrast->Point = _swrast_add_spec_terms_point;

-   }

-

-   swrast->Point( ctx, v0 );

-}

-

-

-/**

- * Called via swrast->BlendFunc.  Examine GL state to choose a blending

- * function, then call it.

- */

-static void _ASMAPI

-_swrast_validate_blend_func(struct gl_context *ctx, GLuint n, const GLubyte mask[],

-                            GLvoid *src, const GLvoid *dst,

-                            GLenum chanType )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-

-   _swrast_validate_derived( ctx ); /* why is this needed? */

-   _swrast_choose_blend_func( ctx, chanType );

-

-   swrast->BlendFunc( ctx, n, mask, src, dst, chanType );

-}

-

-static void

-_swrast_sleep( struct gl_context *ctx, GLbitfield new_state )

-{

-   (void) ctx; (void) new_state;

-}

-

-

-static void

-_swrast_invalidate_state( struct gl_context *ctx, GLbitfield new_state )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   GLuint i;

-

-   swrast->NewState |= new_state;

-

-   /* After 10 statechanges without any swrast functions being called,

-    * put the module to sleep.

-    */

-   if (++swrast->StateChanges > 10) {

-      swrast->InvalidateState = _swrast_sleep;

-      swrast->NewState = ~0;

-      new_state = ~0;

-   }

-

-   if (new_state & swrast->InvalidateTriangleMask)

-      swrast->Triangle = _swrast_validate_triangle;

-

-   if (new_state & swrast->InvalidateLineMask)

-      swrast->Line = _swrast_validate_line;

-

-   if (new_state & swrast->InvalidatePointMask)

-      swrast->Point = _swrast_validate_point;

-

-   if (new_state & _SWRAST_NEW_BLEND_FUNC)

-      swrast->BlendFunc = _swrast_validate_blend_func;

-

-   if (new_state & _SWRAST_NEW_TEXTURE_SAMPLE_FUNC)

-      for (i = 0 ; i < ctx->Const.MaxTextureImageUnits ; i++)

-	 swrast->TextureSample[i] = NULL;

-}

-

-

-void

-_swrast_update_texture_samplers(struct gl_context *ctx)

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   GLuint u;

-

-   if (!swrast)

-      return; /* pipe hack */

-

-   for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {

-      const struct gl_texture_object *tObj = ctx->Texture.Unit[u]._Current;

-      /* Note: If tObj is NULL, the sample function will be a simple

-       * function that just returns opaque black (0,0,0,1).

-       */

-      swrast->TextureSample[u] = _swrast_choose_texture_sample_func(ctx, tObj);

-   }

-}

-

-

-/**

- * Update swrast->_ActiveAttribs, swrast->_NumActiveAttribs,

- * swrast->_ActiveAtttribMask.

- */

-static void

-_swrast_update_active_attribs(struct gl_context *ctx)

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   GLuint attribsMask;

-

-   /*

-    * Compute _ActiveAttribsMask = which fragment attributes are needed.

-    */

-   if (ctx->FragmentProgram._Current) {

-      /* fragment program/shader */

-      attribsMask = ctx->FragmentProgram._Current->Base.InputsRead;

-      attribsMask &= ~FRAG_BIT_WPOS; /* WPOS is always handled specially */

-   }

-   else if (ctx->ATIFragmentShader._Enabled) {

-      attribsMask = ~0;  /* XXX fix me */

-   }

-   else {

-      /* fixed function */

-      attribsMask = 0x0;

-

-#if CHAN_TYPE == GL_FLOAT

-      attribsMask |= FRAG_BIT_COL0;

-#endif

-

-      if (ctx->Fog.ColorSumEnabled ||

-          (ctx->Light.Enabled &&

-           ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)) {

-         attribsMask |= FRAG_BIT_COL1;

-      }

-

-      if (swrast->_FogEnabled)

-         attribsMask |= FRAG_BIT_FOGC;

-

-      attribsMask |= (ctx->Texture._EnabledUnits << FRAG_ATTRIB_TEX0);

-   }

-

-   swrast->_ActiveAttribMask = attribsMask;

-

-   /* Update _ActiveAttribs[] list */

-   {

-      GLuint i, num = 0;

-      for (i = 0; i < FRAG_ATTRIB_MAX; i++) {

-         if (attribsMask & (1 << i)) {

-            swrast->_ActiveAttribs[num++] = i;

-            /* how should this attribute be interpolated? */

-            if (i == FRAG_ATTRIB_COL0 || i == FRAG_ATTRIB_COL1)

-               swrast->_InterpMode[i] = ctx->Light.ShadeModel;

-            else

-               swrast->_InterpMode[i] = GL_SMOOTH;

-         }

-      }

-      swrast->_NumActiveAttribs = num;

-   }

-}

-

-

-void

-_swrast_validate_derived( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-

-   if (swrast->NewState) {

-      if (swrast->NewState & _NEW_POLYGON)

-	 _swrast_update_polygon( ctx );

-

-      if (swrast->NewState & (_NEW_HINT | _NEW_PROGRAM))

-	 _swrast_update_fog_hint( ctx );

-

-      if (swrast->NewState & _SWRAST_NEW_TEXTURE_ENV_MODE)

-	 _swrast_update_texture_env( ctx );

-

-      if (swrast->NewState & (_NEW_FOG | _NEW_PROGRAM))

-         _swrast_update_fog_state( ctx );

-

-      if (swrast->NewState & (_NEW_PROGRAM_CONSTANTS | _NEW_PROGRAM))

-	 _swrast_update_fragment_program( ctx, swrast->NewState );

-

-      if (swrast->NewState & (_NEW_TEXTURE | _NEW_PROGRAM)) {

-         _swrast_update_texture_samplers( ctx );

-      }

-

-      if (swrast->NewState & (_NEW_COLOR | _NEW_PROGRAM))

-         _swrast_update_deferred_texture(ctx);

-

-      if (swrast->NewState & _SWRAST_NEW_RASTERMASK)

- 	 _swrast_update_rasterflags( ctx );

-

-      if (swrast->NewState & (_NEW_DEPTH |

-                              _NEW_FOG |

-                              _NEW_LIGHT |

-                              _NEW_PROGRAM |

-                              _NEW_TEXTURE))

-         _swrast_update_active_attribs(ctx);

-

-      if (swrast->NewState & (_NEW_FOG | 

-                              _NEW_PROGRAM |

-                              _NEW_LIGHT |

-                              _NEW_TEXTURE))

-         _swrast_update_specular_vertex_add(ctx);

-

-      swrast->NewState = 0;

-      swrast->StateChanges = 0;

-      swrast->InvalidateState = _swrast_invalidate_state;

-   }

-}

-

-#define SWRAST_DEBUG 0

-

-/* Public entrypoints:  See also s_accum.c, s_bitmap.c, etc.

- */

-void

-_swrast_Quad( struct gl_context *ctx,

-	      const SWvertex *v0, const SWvertex *v1,

-              const SWvertex *v2, const SWvertex *v3 )

-{

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_Quad\n");

-      _swrast_print_vertex( ctx, v0 );

-      _swrast_print_vertex( ctx, v1 );

-      _swrast_print_vertex( ctx, v2 );

-      _swrast_print_vertex( ctx, v3 );

-   }

-   SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v3 );

-   SWRAST_CONTEXT(ctx)->Triangle( ctx, v1, v2, v3 );

-}

-

-void

-_swrast_Triangle( struct gl_context *ctx, const SWvertex *v0,

-                  const SWvertex *v1, const SWvertex *v2 )

-{

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_Triangle\n");

-      _swrast_print_vertex( ctx, v0 );

-      _swrast_print_vertex( ctx, v1 );

-      _swrast_print_vertex( ctx, v2 );

-   }

-   SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v2 );

-}

-

-void

-_swrast_Line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 )

-{

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_Line\n");

-      _swrast_print_vertex( ctx, v0 );

-      _swrast_print_vertex( ctx, v1 );

-   }

-   SWRAST_CONTEXT(ctx)->Line( ctx, v0, v1 );

-}

-

-void

-_swrast_Point( struct gl_context *ctx, const SWvertex *v0 )

-{

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_Point\n");

-      _swrast_print_vertex( ctx, v0 );

-   }

-   SWRAST_CONTEXT(ctx)->Point( ctx, v0 );

-}

-

-void

-_swrast_InvalidateState( struct gl_context *ctx, GLbitfield new_state )

-{

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_InvalidateState\n");

-   }

-   SWRAST_CONTEXT(ctx)->InvalidateState( ctx, new_state );

-}

-

-void

-_swrast_ResetLineStipple( struct gl_context *ctx )

-{

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_ResetLineStipple\n");

-   }

-   SWRAST_CONTEXT(ctx)->StippleCounter = 0;

-}

-

-void

-_swrast_SetFacing(struct gl_context *ctx, GLuint facing)

-{

-   SWRAST_CONTEXT(ctx)->PointLineFacing = facing;

-}

-

-void

-_swrast_allow_vertex_fog( struct gl_context *ctx, GLboolean value )

-{

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_allow_vertex_fog %d\n", value);

-   }

-   SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT );

-   SWRAST_CONTEXT(ctx)->AllowVertexFog = value;

-}

-

-void

-_swrast_allow_pixel_fog( struct gl_context *ctx, GLboolean value )

-{

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_allow_pixel_fog %d\n", value);

-   }

-   SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT );

-   SWRAST_CONTEXT(ctx)->AllowPixelFog = value;

-}

-

-

-/**

- * Initialize native program limits by copying the logical limits.

- * See comments in init_program_limits() in context.c

- */

-static void

-init_program_native_limits(struct gl_program_constants *prog)

-{

-   prog->MaxNativeInstructions = prog->MaxInstructions;

-   prog->MaxNativeAluInstructions = prog->MaxAluInstructions;

-   prog->MaxNativeTexInstructions = prog->MaxTexInstructions;

-   prog->MaxNativeTexIndirections = prog->MaxTexIndirections;

-   prog->MaxNativeAttribs = prog->MaxAttribs;

-   prog->MaxNativeTemps = prog->MaxTemps;

-   prog->MaxNativeAddressRegs = prog->MaxAddressRegs;

-   prog->MaxNativeParameters = prog->MaxParameters;

-}

-

-

-GLboolean

-_swrast_CreateContext( struct gl_context *ctx )

-{

-   GLuint i;

-   SWcontext *swrast = (SWcontext *)CALLOC(sizeof(SWcontext));

-#ifdef _OPENMP

-   const GLint maxThreads = omp_get_max_threads();

-#else

-   const GLint maxThreads = 1;

-#endif

-

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_CreateContext\n");

-   }

-

-   if (!swrast)

-      return GL_FALSE;

-

-   swrast->NewState = ~0;

-

-   swrast->choose_point = _swrast_choose_point;

-   swrast->choose_line = _swrast_choose_line;

-   swrast->choose_triangle = _swrast_choose_triangle;

-

-   swrast->InvalidatePointMask = _SWRAST_NEW_POINT;

-   swrast->InvalidateLineMask = _SWRAST_NEW_LINE;

-   swrast->InvalidateTriangleMask = _SWRAST_NEW_TRIANGLE;

-

-   swrast->Point = _swrast_validate_point;

-   swrast->Line = _swrast_validate_line;

-   swrast->Triangle = _swrast_validate_triangle;

-   swrast->InvalidateState = _swrast_sleep;

-   swrast->BlendFunc = _swrast_validate_blend_func;

-

-   swrast->AllowVertexFog = GL_TRUE;

-   swrast->AllowPixelFog = GL_TRUE;

-

-   /* Optimized Accum buffer */

-   swrast->_IntegerAccumMode = GL_FALSE;

-   swrast->_IntegerAccumScaler = 0.0;

-

-   for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++)

-      swrast->TextureSample[i] = NULL;

-

-   /* SpanArrays is global and shared by all SWspan instances. However, when

-    * using multiple threads, it is necessary to have one SpanArrays instance

-    * per thread.

-    */

-   swrast->SpanArrays = (SWspanarrays *) MALLOC(maxThreads * sizeof(SWspanarrays));

-   if (!swrast->SpanArrays) {

-      FREE(swrast);

-      return GL_FALSE;

-   }

-   for(i = 0; i < maxThreads; i++) {

-      swrast->SpanArrays[i].ChanType = CHAN_TYPE;

-#if CHAN_TYPE == GL_UNSIGNED_BYTE

-      swrast->SpanArrays[i].rgba = swrast->SpanArrays[i].rgba8;

-#elif CHAN_TYPE == GL_UNSIGNED_SHORT

-      swrast->SpanArrays[i].rgba = swrast->SpanArrays[i].rgba16;

-#else

-      swrast->SpanArrays[i].rgba = swrast->SpanArrays[i].attribs[FRAG_ATTRIB_COL0];

-#endif

-   }

-

-   /* init point span buffer */

-   swrast->PointSpan.primitive = GL_POINT;

-   swrast->PointSpan.end = 0;

-   swrast->PointSpan.facing = 0;

-   swrast->PointSpan.array = swrast->SpanArrays;

-

-   /* TexelBuffer is also global and normally shared by all SWspan instances;

-    * when running with multiple threads, create one per thread.

-    */

-   swrast->TexelBuffer = (GLfloat *) MALLOC(ctx->Const.MaxTextureImageUnits * maxThreads *

-                                           MAX_WIDTH * 4 * sizeof(GLfloat));

-   if (!swrast->TexelBuffer) {

-      FREE(swrast->SpanArrays);

-      FREE(swrast);

-      return GL_FALSE;

-   }

-

-   init_program_native_limits(&ctx->Const.VertexProgram);

-   init_program_native_limits(&ctx->Const.GeometryProgram);

-   init_program_native_limits(&ctx->Const.FragmentProgram);

-

-   ctx->swrast_context = swrast;

-

-   return GL_TRUE;

-}

-

-void

-_swrast_DestroyContext( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-

-   if (SWRAST_DEBUG) {

-      _mesa_debug(ctx, "_swrast_DestroyContext\n");

-   }

-

-   FREE( swrast->SpanArrays );

-   if (swrast->ZoomedArrays)

-      FREE( swrast->ZoomedArrays );

-   FREE( swrast->TexelBuffer );

-   FREE( swrast );

-

-   ctx->swrast_context = 0;

-}

-

-

-struct swrast_device_driver *

-_swrast_GetDeviceDriverReference( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   return &swrast->Driver;

-}

-

-void

-_swrast_flush( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   /* flush any pending fragments from rendering points */

-   if (swrast->PointSpan.end > 0) {

-      _swrast_write_rgba_span(ctx, &(swrast->PointSpan));

-      swrast->PointSpan.end = 0;

-   }

-}

-

-void

-_swrast_render_primitive( struct gl_context *ctx, GLenum prim )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   if (swrast->Primitive == GL_POINTS && prim != GL_POINTS) {

-      _swrast_flush(ctx);

-   }

-   swrast->Primitive = prim;

-}

-

-

-void

-_swrast_render_start( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   if (swrast->Driver.SpanRenderStart)

-      swrast->Driver.SpanRenderStart( ctx );

-   swrast->PointSpan.end = 0;

-}

- 

-void

-_swrast_render_finish( struct gl_context *ctx )

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   if (swrast->Driver.SpanRenderFinish)

-      swrast->Driver.SpanRenderFinish( ctx );

-

-   _swrast_flush(ctx);

-}

-

-

-#define SWRAST_DEBUG_VERTICES 0

-

-void

-_swrast_print_vertex( struct gl_context *ctx, const SWvertex *v )

-{

-   GLuint i;

-

-   if (SWRAST_DEBUG_VERTICES) {

-      _mesa_debug(ctx, "win %f %f %f %f\n",

-                  v->attrib[FRAG_ATTRIB_WPOS][0],

-                  v->attrib[FRAG_ATTRIB_WPOS][1],

-                  v->attrib[FRAG_ATTRIB_WPOS][2],

-                  v->attrib[FRAG_ATTRIB_WPOS][3]);

-

-      for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++)

-	 if (ctx->Texture.Unit[i]._ReallyEnabled)

-	    _mesa_debug(ctx, "texcoord[%d] %f %f %f %f\n", i,

-                        v->attrib[FRAG_ATTRIB_TEX0 + i][0],

-                        v->attrib[FRAG_ATTRIB_TEX0 + i][1],

-                        v->attrib[FRAG_ATTRIB_TEX0 + i][2],

-                        v->attrib[FRAG_ATTRIB_TEX0 + i][3]);

-

-#if CHAN_TYPE == GL_FLOAT

-      _mesa_debug(ctx, "color %f %f %f %f\n",

-                  v->color[0], v->color[1], v->color[2], v->color[3]);

-#else

-      _mesa_debug(ctx, "color %d %d %d %d\n",

-                  v->color[0], v->color[1], v->color[2], v->color[3]);

-#endif

-      _mesa_debug(ctx, "spec %g %g %g %g\n",

-                  v->attrib[FRAG_ATTRIB_COL1][0],

-                  v->attrib[FRAG_ATTRIB_COL1][1],

-                  v->attrib[FRAG_ATTRIB_COL1][2],

-                  v->attrib[FRAG_ATTRIB_COL1][3]);

-      _mesa_debug(ctx, "fog %f\n", v->attrib[FRAG_ATTRIB_FOGC][0]);

-      _mesa_debug(ctx, "index %f\n", v->attrib[FRAG_ATTRIB_CI][0]);

-      _mesa_debug(ctx, "pointsize %f\n", v->pointSize);

-      _mesa_debug(ctx, "\n");

-   }

-}

+/*
+ * Mesa 3-D graphics library
+ * Version:  7.1
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Keith Whitwell <keith@tungstengraphics.com>
+ *    Brian Paul
+ */
+
+#include "main/imports.h"
+#include "main/bufferobj.h"
+#include "main/colormac.h"
+#include "main/mtypes.h"
+#include "main/teximage.h"
+#include "program/prog_parameter.h"
+#include "program/prog_statevars.h"
+#include "swrast.h"
+#include "s_blend.h"
+#include "s_context.h"
+#include "s_lines.h"
+#include "s_points.h"
+#include "s_span.h"
+#include "s_triangle.h"
+#include "s_texfilter.h"
+
+
+/**
+ * Recompute the value of swrast->_RasterMask, etc. according to
+ * the current context.  The _RasterMask field can be easily tested by
+ * drivers to determine certain basic GL state (does the primitive need
+ * stenciling, logic-op, fog, etc?).
+ */
+static void
+_swrast_update_rasterflags( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLbitfield rasterMask = 0;
+   GLuint i;
+
+   if (ctx->Color.AlphaEnabled)           rasterMask |= ALPHATEST_BIT;
+   if (ctx->Color.BlendEnabled)           rasterMask |= BLEND_BIT;
+   if (ctx->Depth.Test)                   rasterMask |= DEPTH_BIT;
+   if (swrast->_FogEnabled)               rasterMask |= FOG_BIT;
+   if (ctx->Scissor.Enabled)              rasterMask |= CLIP_BIT;
+   if (ctx->Stencil._Enabled)             rasterMask |= STENCIL_BIT;
+   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
+      if (!ctx->Color.ColorMask[i][0] ||
+          !ctx->Color.ColorMask[i][1] ||
+          !ctx->Color.ColorMask[i][2] ||
+          !ctx->Color.ColorMask[i][3]) {
+         rasterMask |= MASKING_BIT;
+         break;
+      }
+   }
+   if (ctx->Color._LogicOpEnabled)     rasterMask |= LOGIC_OP_BIT;
+   if (ctx->Texture._EnabledUnits)     rasterMask |= TEXTURE_BIT;
+   if (   ctx->Viewport.X < 0
+       || ctx->Viewport.X + ctx->Viewport.Width > (GLint) ctx->DrawBuffer->Width
+       || ctx->Viewport.Y < 0
+       || ctx->Viewport.Y + ctx->Viewport.Height > (GLint) ctx->DrawBuffer->Height) {
+      rasterMask |= CLIP_BIT;
+   }
+
+   if (ctx->Query.CurrentOcclusionObject)
+      rasterMask |= OCCLUSION_BIT;
+
+
+   /* If we're not drawing to exactly one color buffer set the
+    * MULTI_DRAW_BIT flag.  Also set it if we're drawing to no
+    * buffers or the RGBA or CI mask disables all writes.
+    */
+   if (ctx->DrawBuffer->_NumColorDrawBuffers != 1) {
+      /* more than one color buffer designated for writing (or zero buffers) */
+      rasterMask |= MULTI_DRAW_BIT;
+   }
+
+   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
+      if (ctx->Color.ColorMask[i][0] +
+          ctx->Color.ColorMask[i][1] +
+          ctx->Color.ColorMask[i][2] +
+          ctx->Color.ColorMask[i][3] == 0) {
+         rasterMask |= MULTI_DRAW_BIT; /* all RGBA channels disabled */
+         break;
+      }
+   }
+
+
+   if (ctx->FragmentProgram._Current) {
+      rasterMask |= FRAGPROG_BIT;
+   }
+
+   if (ctx->ATIFragmentShader._Enabled) {
+      rasterMask |= ATIFRAGSHADER_BIT;
+   }
+
+#if CHAN_TYPE == GL_FLOAT
+   if (ctx->Color.ClampFragmentColor == GL_TRUE) {
+      rasterMask |= CLAMPING_BIT;
+   }
+#endif
+
+   SWRAST_CONTEXT(ctx)->_RasterMask = rasterMask;
+}
+
+
+/**
+ * Examine polygon cull state to compute the _BackfaceCullSign field.
+ * _BackfaceCullSign will be 0 if no culling, -1 if culling back-faces,
+ * and 1 if culling front-faces.  The Polygon FrontFace state also
+ * factors in.
+ */
+static void
+_swrast_update_polygon( struct gl_context *ctx )
+{
+   GLfloat backface_sign;
+
+   if (ctx->Polygon.CullFlag) {
+      switch (ctx->Polygon.CullFaceMode) {
+      case GL_BACK:
+         backface_sign = -1.0F;
+	 break;
+      case GL_FRONT:
+         backface_sign = 1.0F;
+	 break;
+      case GL_FRONT_AND_BACK:
+         /* fallthrough */
+      default:
+	 backface_sign = 0.0F;
+      }
+   }
+   else {
+      backface_sign = 0.0F;
+   }
+
+   SWRAST_CONTEXT(ctx)->_BackfaceCullSign = backface_sign;
+
+   /* This is for front/back-face determination, but not for culling */
+   SWRAST_CONTEXT(ctx)->_BackfaceSign
+      = (ctx->Polygon.FrontFace == GL_CW) ? -1.0F : 1.0F;
+}
+
+
+
+/**
+ * Update the _PreferPixelFog field to indicate if we need to compute
+ * fog blend factors (from the fog coords) per-fragment.
+ */
+static void
+_swrast_update_fog_hint( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   swrast->_PreferPixelFog = (!swrast->AllowVertexFog ||
+                              ctx->FragmentProgram._Current ||
+			      (ctx->Hint.Fog == GL_NICEST &&
+			       swrast->AllowPixelFog));
+}
+
+
+
+/**
+ * Update the swrast->_TextureCombinePrimary flag.
+ */
+static void
+_swrast_update_texture_env( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLuint i;
+
+   swrast->_TextureCombinePrimary = GL_FALSE;
+
+   for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
+      const struct gl_tex_env_combine_state *combine =
+         ctx->Texture.Unit[i]._CurrentCombine;
+      GLuint term;
+      for (term = 0; term < combine->_NumArgsRGB; term++) {
+         if (combine->SourceRGB[term] == GL_PRIMARY_COLOR) {
+            swrast->_TextureCombinePrimary = GL_TRUE;
+            return;
+         }
+         if (combine->SourceA[term] == GL_PRIMARY_COLOR) {
+            swrast->_TextureCombinePrimary = GL_TRUE;
+            return;
+         }
+      }
+   }
+}
+
+
+/**
+ * Determine if we can defer texturing/shading until after Z/stencil
+ * testing.  This potentially allows us to skip texturing/shading for
+ * lots of fragments.
+ */
+static void
+_swrast_update_deferred_texture(struct gl_context *ctx)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   if (ctx->Color.AlphaEnabled) {
+      /* alpha test depends on post-texture/shader colors */
+      swrast->_DeferredTexture = GL_FALSE;
+   }
+   else {
+      const struct gl_fragment_program *fprog
+         = ctx->FragmentProgram._Current;
+      if (fprog && (fprog->Base.OutputsWritten & (1 << FRAG_RESULT_DEPTH))) {
+         /* Z comes from fragment program/shader */
+         swrast->_DeferredTexture = GL_FALSE;
+      }
+      else if (fprog && fprog->UsesKill) {
+         swrast->_DeferredTexture = GL_FALSE;
+      }
+      else if (ctx->Query.CurrentOcclusionObject) {
+         /* occlusion query depends on shader discard/kill results */
+         swrast->_DeferredTexture = GL_FALSE;
+      }
+      else {
+         swrast->_DeferredTexture = GL_TRUE;
+      }
+   }
+}
+
+
+/**
+ * Update swrast->_FogColor and swrast->_FogEnable values.
+ */
+static void
+_swrast_update_fog_state( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
+
+   assert((fp == NULL) || (fp->Base.Target == GL_FRAGMENT_PROGRAM_ARB));
+
+   /* determine if fog is needed, and if so, which fog mode */
+   swrast->_FogEnabled = (fp == NULL && ctx->Fog.Enabled);
+}
+
+
+/**
+ * Update state for running fragment programs.  Basically, load the
+ * program parameters with current state values.
+ */
+static void
+_swrast_update_fragment_program(struct gl_context *ctx, GLbitfield newState)
+{
+   const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
+   if (fp) {
+      _mesa_load_state_parameters(ctx, fp->Base.Parameters);
+   }
+}
+
+
+/**
+ * See if we can do early diffuse+specular (primary+secondary) color
+ * add per vertex instead of per-fragment.
+ */
+static void
+_swrast_update_specular_vertex_add(struct gl_context *ctx)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLboolean separateSpecular = ctx->Fog.ColorSumEnabled ||
+      (ctx->Light.Enabled &&
+       ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR);
+
+   swrast->SpecularVertexAdd = (separateSpecular
+                                && ctx->Texture._EnabledUnits == 0x0
+                                && !ctx->FragmentProgram._Current
+                                && !ctx->ATIFragmentShader._Enabled);
+}
+
+
+#define _SWRAST_NEW_DERIVED (_SWRAST_NEW_RASTERMASK |	\
+                             _NEW_PROGRAM_CONSTANTS |   \
+			     _NEW_TEXTURE |		\
+			     _NEW_HINT |		\
+			     _NEW_POLYGON )
+
+/* State referenced by _swrast_choose_triangle, _swrast_choose_line.
+ */
+#define _SWRAST_NEW_TRIANGLE (_SWRAST_NEW_DERIVED |		\
+			      _NEW_RENDERMODE|			\
+                              _NEW_POLYGON|			\
+                              _NEW_DEPTH|			\
+                              _NEW_STENCIL|			\
+                              _NEW_COLOR|			\
+                              _NEW_TEXTURE|			\
+                              _SWRAST_NEW_RASTERMASK|		\
+                              _NEW_LIGHT|			\
+                              _NEW_FOG |			\
+			      _DD_NEW_SEPARATE_SPECULAR)
+
+#define _SWRAST_NEW_LINE (_SWRAST_NEW_DERIVED |		\
+			  _NEW_RENDERMODE|		\
+                          _NEW_LINE|			\
+                          _NEW_TEXTURE|			\
+                          _NEW_LIGHT|			\
+                          _NEW_FOG|			\
+                          _NEW_DEPTH |			\
+                          _DD_NEW_SEPARATE_SPECULAR)
+
+#define _SWRAST_NEW_POINT (_SWRAST_NEW_DERIVED |	\
+			   _NEW_RENDERMODE |		\
+			   _NEW_POINT |			\
+			   _NEW_TEXTURE |		\
+			   _NEW_LIGHT |			\
+			   _NEW_FOG |			\
+                           _DD_NEW_SEPARATE_SPECULAR)
+
+#define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE
+
+#define _SWRAST_NEW_TEXTURE_ENV_MODE _NEW_TEXTURE
+
+#define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR
+
+
+
+/**
+ * Stub for swrast->Triangle to select a true triangle function
+ * after a state change.
+ */
+static void
+_swrast_validate_triangle( struct gl_context *ctx,
+			   const SWvertex *v0,
+                           const SWvertex *v1,
+                           const SWvertex *v2 )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+   _swrast_validate_derived( ctx );
+   swrast->choose_triangle( ctx );
+   ASSERT(swrast->Triangle);
+
+   if (swrast->SpecularVertexAdd) {
+      /* separate specular color, but no texture */
+      swrast->SpecTriangle = swrast->Triangle;
+      swrast->Triangle = _swrast_add_spec_terms_triangle;
+   }
+
+   swrast->Triangle( ctx, v0, v1, v2 );
+}
+
+/**
+ * Called via swrast->Line.  Examine current GL state and choose a software
+ * line routine.  Then call it.
+ */
+static void
+_swrast_validate_line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+   _swrast_validate_derived( ctx );
+   swrast->choose_line( ctx );
+   ASSERT(swrast->Line);
+
+   if (swrast->SpecularVertexAdd) {
+      swrast->SpecLine = swrast->Line;
+      swrast->Line = _swrast_add_spec_terms_line;
+   }
+
+   swrast->Line( ctx, v0, v1 );
+}
+
+/**
+ * Called via swrast->Point.  Examine current GL state and choose a software
+ * point routine.  Then call it.
+ */
+static void
+_swrast_validate_point( struct gl_context *ctx, const SWvertex *v0 )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+   _swrast_validate_derived( ctx );
+   swrast->choose_point( ctx );
+
+   if (swrast->SpecularVertexAdd) {
+      swrast->SpecPoint = swrast->Point;
+      swrast->Point = _swrast_add_spec_terms_point;
+   }
+
+   swrast->Point( ctx, v0 );
+}
+
+
+/**
+ * Called via swrast->BlendFunc.  Examine GL state to choose a blending
+ * function, then call it.
+ */
+static void _ASMAPI
+_swrast_validate_blend_func(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+                            GLvoid *src, const GLvoid *dst,
+                            GLenum chanType )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+   _swrast_validate_derived( ctx ); /* why is this needed? */
+   _swrast_choose_blend_func( ctx, chanType );
+
+   swrast->BlendFunc( ctx, n, mask, src, dst, chanType );
+}
+
+static void
+_swrast_sleep( struct gl_context *ctx, GLbitfield new_state )
+{
+   (void) ctx; (void) new_state;
+}
+
+
+static void
+_swrast_invalidate_state( struct gl_context *ctx, GLbitfield new_state )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLuint i;
+
+   swrast->NewState |= new_state;
+
+   /* After 10 statechanges without any swrast functions being called,
+    * put the module to sleep.
+    */
+   if (++swrast->StateChanges > 10) {
+      swrast->InvalidateState = _swrast_sleep;
+      swrast->NewState = ~0;
+      new_state = ~0;
+   }
+
+   if (new_state & swrast->InvalidateTriangleMask)
+      swrast->Triangle = _swrast_validate_triangle;
+
+   if (new_state & swrast->InvalidateLineMask)
+      swrast->Line = _swrast_validate_line;
+
+   if (new_state & swrast->InvalidatePointMask)
+      swrast->Point = _swrast_validate_point;
+
+   if (new_state & _SWRAST_NEW_BLEND_FUNC)
+      swrast->BlendFunc = _swrast_validate_blend_func;
+
+   if (new_state & _SWRAST_NEW_TEXTURE_SAMPLE_FUNC)
+      for (i = 0 ; i < ctx->Const.MaxTextureImageUnits ; i++)
+	 swrast->TextureSample[i] = NULL;
+}
+
+
+void
+_swrast_update_texture_samplers(struct gl_context *ctx)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLuint u;
+
+   if (!swrast)
+      return; /* pipe hack */
+
+   for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {
+      const struct gl_texture_object *tObj = ctx->Texture.Unit[u]._Current;
+      /* Note: If tObj is NULL, the sample function will be a simple
+       * function that just returns opaque black (0,0,0,1).
+       */
+      swrast->TextureSample[u] = _swrast_choose_texture_sample_func(ctx, tObj);
+   }
+}
+
+
+/**
+ * Update swrast->_ActiveAttribs, swrast->_NumActiveAttribs,
+ * swrast->_ActiveAtttribMask.
+ */
+static void
+_swrast_update_active_attribs(struct gl_context *ctx)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLuint attribsMask;
+
+   /*
+    * Compute _ActiveAttribsMask = which fragment attributes are needed.
+    */
+   if (ctx->FragmentProgram._Current) {
+      /* fragment program/shader */
+      attribsMask = ctx->FragmentProgram._Current->Base.InputsRead;
+      attribsMask &= ~FRAG_BIT_WPOS; /* WPOS is always handled specially */
+   }
+   else if (ctx->ATIFragmentShader._Enabled) {
+      attribsMask = ~0;  /* XXX fix me */
+   }
+   else {
+      /* fixed function */
+      attribsMask = 0x0;
+
+#if CHAN_TYPE == GL_FLOAT
+      attribsMask |= FRAG_BIT_COL0;
+#endif
+
+      if (ctx->Fog.ColorSumEnabled ||
+          (ctx->Light.Enabled &&
+           ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)) {
+         attribsMask |= FRAG_BIT_COL1;
+      }
+
+      if (swrast->_FogEnabled)
+         attribsMask |= FRAG_BIT_FOGC;
+
+      attribsMask |= (ctx->Texture._EnabledUnits << FRAG_ATTRIB_TEX0);
+   }
+
+   swrast->_ActiveAttribMask = attribsMask;
+
+   /* Update _ActiveAttribs[] list */
+   {
+      GLuint i, num = 0;
+      for (i = 0; i < FRAG_ATTRIB_MAX; i++) {
+         if (attribsMask & (1 << i)) {
+            swrast->_ActiveAttribs[num++] = i;
+            /* how should this attribute be interpolated? */
+            if (i == FRAG_ATTRIB_COL0 || i == FRAG_ATTRIB_COL1)
+               swrast->_InterpMode[i] = ctx->Light.ShadeModel;
+            else
+               swrast->_InterpMode[i] = GL_SMOOTH;
+         }
+      }
+      swrast->_NumActiveAttribs = num;
+   }
+}
+
+
+void
+_swrast_validate_derived( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+   if (swrast->NewState) {
+      if (swrast->NewState & _NEW_POLYGON)
+	 _swrast_update_polygon( ctx );
+
+      if (swrast->NewState & (_NEW_HINT | _NEW_PROGRAM))
+	 _swrast_update_fog_hint( ctx );
+
+      if (swrast->NewState & _SWRAST_NEW_TEXTURE_ENV_MODE)
+	 _swrast_update_texture_env( ctx );
+
+      if (swrast->NewState & (_NEW_FOG | _NEW_PROGRAM))
+         _swrast_update_fog_state( ctx );
+
+      if (swrast->NewState & (_NEW_PROGRAM_CONSTANTS | _NEW_PROGRAM))
+	 _swrast_update_fragment_program( ctx, swrast->NewState );
+
+      if (swrast->NewState & (_NEW_TEXTURE | _NEW_PROGRAM)) {
+         _swrast_update_texture_samplers( ctx );
+      }
+
+      if (swrast->NewState & (_NEW_COLOR | _NEW_PROGRAM))
+         _swrast_update_deferred_texture(ctx);
+
+      if (swrast->NewState & _SWRAST_NEW_RASTERMASK)
+ 	 _swrast_update_rasterflags( ctx );
+
+      if (swrast->NewState & (_NEW_DEPTH |
+                              _NEW_FOG |
+                              _NEW_LIGHT |
+                              _NEW_PROGRAM |
+                              _NEW_TEXTURE))
+         _swrast_update_active_attribs(ctx);
+
+      if (swrast->NewState & (_NEW_FOG | 
+                              _NEW_PROGRAM |
+                              _NEW_LIGHT |
+                              _NEW_TEXTURE))
+         _swrast_update_specular_vertex_add(ctx);
+
+      swrast->NewState = 0;
+      swrast->StateChanges = 0;
+      swrast->InvalidateState = _swrast_invalidate_state;
+   }
+}
+
+#define SWRAST_DEBUG 0
+
+/* Public entrypoints:  See also s_accum.c, s_bitmap.c, etc.
+ */
+void
+_swrast_Quad( struct gl_context *ctx,
+	      const SWvertex *v0, const SWvertex *v1,
+              const SWvertex *v2, const SWvertex *v3 )
+{
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_Quad\n");
+      _swrast_print_vertex( ctx, v0 );
+      _swrast_print_vertex( ctx, v1 );
+      _swrast_print_vertex( ctx, v2 );
+      _swrast_print_vertex( ctx, v3 );
+   }
+   SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v3 );
+   SWRAST_CONTEXT(ctx)->Triangle( ctx, v1, v2, v3 );
+}
+
+void
+_swrast_Triangle( struct gl_context *ctx, const SWvertex *v0,
+                  const SWvertex *v1, const SWvertex *v2 )
+{
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_Triangle\n");
+      _swrast_print_vertex( ctx, v0 );
+      _swrast_print_vertex( ctx, v1 );
+      _swrast_print_vertex( ctx, v2 );
+   }
+   SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v2 );
+}
+
+void
+_swrast_Line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 )
+{
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_Line\n");
+      _swrast_print_vertex( ctx, v0 );
+      _swrast_print_vertex( ctx, v1 );
+   }
+   SWRAST_CONTEXT(ctx)->Line( ctx, v0, v1 );
+}
+
+void
+_swrast_Point( struct gl_context *ctx, const SWvertex *v0 )
+{
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_Point\n");
+      _swrast_print_vertex( ctx, v0 );
+   }
+   SWRAST_CONTEXT(ctx)->Point( ctx, v0 );
+}
+
+void
+_swrast_InvalidateState( struct gl_context *ctx, GLbitfield new_state )
+{
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_InvalidateState\n");
+   }
+   SWRAST_CONTEXT(ctx)->InvalidateState( ctx, new_state );
+}
+
+void
+_swrast_ResetLineStipple( struct gl_context *ctx )
+{
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_ResetLineStipple\n");
+   }
+   SWRAST_CONTEXT(ctx)->StippleCounter = 0;
+}
+
+void
+_swrast_SetFacing(struct gl_context *ctx, GLuint facing)
+{
+   SWRAST_CONTEXT(ctx)->PointLineFacing = facing;
+}
+
+void
+_swrast_allow_vertex_fog( struct gl_context *ctx, GLboolean value )
+{
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_allow_vertex_fog %d\n", value);
+   }
+   SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT );
+   SWRAST_CONTEXT(ctx)->AllowVertexFog = value;
+}
+
+void
+_swrast_allow_pixel_fog( struct gl_context *ctx, GLboolean value )
+{
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_allow_pixel_fog %d\n", value);
+   }
+   SWRAST_CONTEXT(ctx)->InvalidateState( ctx, _NEW_HINT );
+   SWRAST_CONTEXT(ctx)->AllowPixelFog = value;
+}
+
+
+/**
+ * Initialize native program limits by copying the logical limits.
+ * See comments in init_program_limits() in context.c
+ */
+static void
+init_program_native_limits(struct gl_program_constants *prog)
+{
+   prog->MaxNativeInstructions = prog->MaxInstructions;
+   prog->MaxNativeAluInstructions = prog->MaxAluInstructions;
+   prog->MaxNativeTexInstructions = prog->MaxTexInstructions;
+   prog->MaxNativeTexIndirections = prog->MaxTexIndirections;
+   prog->MaxNativeAttribs = prog->MaxAttribs;
+   prog->MaxNativeTemps = prog->MaxTemps;
+   prog->MaxNativeAddressRegs = prog->MaxAddressRegs;
+   prog->MaxNativeParameters = prog->MaxParameters;
+}
+
+
+GLboolean
+_swrast_CreateContext( struct gl_context *ctx )
+{
+   GLuint i;
+   SWcontext *swrast = (SWcontext *)CALLOC(sizeof(SWcontext));
+#ifdef _OPENMP
+   const GLint maxThreads = omp_get_max_threads();
+#else
+   const GLint maxThreads = 1;
+#endif
+
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_CreateContext\n");
+   }
+
+   if (!swrast)
+      return GL_FALSE;
+
+   swrast->NewState = ~0;
+
+   swrast->choose_point = _swrast_choose_point;
+   swrast->choose_line = _swrast_choose_line;
+   swrast->choose_triangle = _swrast_choose_triangle;
+
+   swrast->InvalidatePointMask = _SWRAST_NEW_POINT;
+   swrast->InvalidateLineMask = _SWRAST_NEW_LINE;
+   swrast->InvalidateTriangleMask = _SWRAST_NEW_TRIANGLE;
+
+   swrast->Point = _swrast_validate_point;
+   swrast->Line = _swrast_validate_line;
+   swrast->Triangle = _swrast_validate_triangle;
+   swrast->InvalidateState = _swrast_sleep;
+   swrast->BlendFunc = _swrast_validate_blend_func;
+
+   swrast->AllowVertexFog = GL_TRUE;
+   swrast->AllowPixelFog = GL_TRUE;
+
+   /* Optimized Accum buffer */
+   swrast->_IntegerAccumMode = GL_FALSE;
+   swrast->_IntegerAccumScaler = 0.0;
+
+   for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++)
+      swrast->TextureSample[i] = NULL;
+
+   /* SpanArrays is global and shared by all SWspan instances. However, when
+    * using multiple threads, it is necessary to have one SpanArrays instance
+    * per thread.
+    */
+   swrast->SpanArrays = (SWspanarrays *) MALLOC(maxThreads * sizeof(SWspanarrays));
+   if (!swrast->SpanArrays) {
+      FREE(swrast);
+      return GL_FALSE;
+   }
+   for(i = 0; i < maxThreads; i++) {
+      swrast->SpanArrays[i].ChanType = CHAN_TYPE;
+#if CHAN_TYPE == GL_UNSIGNED_BYTE
+      swrast->SpanArrays[i].rgba = swrast->SpanArrays[i].rgba8;
+#elif CHAN_TYPE == GL_UNSIGNED_SHORT
+      swrast->SpanArrays[i].rgba = swrast->SpanArrays[i].rgba16;
+#else
+      swrast->SpanArrays[i].rgba = swrast->SpanArrays[i].attribs[FRAG_ATTRIB_COL0];
+#endif
+   }
+
+   /* init point span buffer */
+   swrast->PointSpan.primitive = GL_POINT;
+   swrast->PointSpan.end = 0;
+   swrast->PointSpan.facing = 0;
+   swrast->PointSpan.array = swrast->SpanArrays;
+
+   /* TexelBuffer is also global and normally shared by all SWspan instances;
+    * when running with multiple threads, create one per thread.
+    */
+   swrast->TexelBuffer = (GLfloat *) MALLOC(ctx->Const.MaxTextureImageUnits * maxThreads *
+                                           MAX_WIDTH * 4 * sizeof(GLfloat));
+   if (!swrast->TexelBuffer) {
+      FREE(swrast->SpanArrays);
+      FREE(swrast);
+      return GL_FALSE;
+   }
+
+   init_program_native_limits(&ctx->Const.VertexProgram);
+   init_program_native_limits(&ctx->Const.GeometryProgram);
+   init_program_native_limits(&ctx->Const.FragmentProgram);
+
+   ctx->swrast_context = swrast;
+
+   return GL_TRUE;
+}
+
+void
+_swrast_DestroyContext( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+   if (SWRAST_DEBUG) {
+      _mesa_debug(ctx, "_swrast_DestroyContext\n");
+   }
+
+   FREE( swrast->SpanArrays );
+   if (swrast->ZoomedArrays)
+      FREE( swrast->ZoomedArrays );
+   FREE( swrast->TexelBuffer );
+   FREE( swrast );
+
+   ctx->swrast_context = 0;
+}
+
+
+struct swrast_device_driver *
+_swrast_GetDeviceDriverReference( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   return &swrast->Driver;
+}
+
+void
+_swrast_flush( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   /* flush any pending fragments from rendering points */
+   if (swrast->PointSpan.end > 0) {
+      _swrast_write_rgba_span(ctx, &(swrast->PointSpan));
+      swrast->PointSpan.end = 0;
+   }
+}
+
+void
+_swrast_render_primitive( struct gl_context *ctx, GLenum prim )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   if (swrast->Primitive == GL_POINTS && prim != GL_POINTS) {
+      _swrast_flush(ctx);
+   }
+   swrast->Primitive = prim;
+}
+
+
+void
+_swrast_render_start( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   if (swrast->Driver.SpanRenderStart)
+      swrast->Driver.SpanRenderStart( ctx );
+   swrast->PointSpan.end = 0;
+}
+ 
+void
+_swrast_render_finish( struct gl_context *ctx )
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   if (swrast->Driver.SpanRenderFinish)
+      swrast->Driver.SpanRenderFinish( ctx );
+
+   _swrast_flush(ctx);
+}
+
+
+#define SWRAST_DEBUG_VERTICES 0
+
+void
+_swrast_print_vertex( struct gl_context *ctx, const SWvertex *v )
+{
+   GLuint i;
+
+   if (SWRAST_DEBUG_VERTICES) {
+      _mesa_debug(ctx, "win %f %f %f %f\n",
+                  v->attrib[FRAG_ATTRIB_WPOS][0],
+                  v->attrib[FRAG_ATTRIB_WPOS][1],
+                  v->attrib[FRAG_ATTRIB_WPOS][2],
+                  v->attrib[FRAG_ATTRIB_WPOS][3]);
+
+      for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++)
+	 if (ctx->Texture.Unit[i]._ReallyEnabled)
+	    _mesa_debug(ctx, "texcoord[%d] %f %f %f %f\n", i,
+                        v->attrib[FRAG_ATTRIB_TEX0 + i][0],
+                        v->attrib[FRAG_ATTRIB_TEX0 + i][1],
+                        v->attrib[FRAG_ATTRIB_TEX0 + i][2],
+                        v->attrib[FRAG_ATTRIB_TEX0 + i][3]);
+
+#if CHAN_TYPE == GL_FLOAT
+      _mesa_debug(ctx, "color %f %f %f %f\n",
+                  v->color[0], v->color[1], v->color[2], v->color[3]);
+#else
+      _mesa_debug(ctx, "color %d %d %d %d\n",
+                  v->color[0], v->color[1], v->color[2], v->color[3]);
+#endif
+      _mesa_debug(ctx, "spec %g %g %g %g\n",
+                  v->attrib[FRAG_ATTRIB_COL1][0],
+                  v->attrib[FRAG_ATTRIB_COL1][1],
+                  v->attrib[FRAG_ATTRIB_COL1][2],
+                  v->attrib[FRAG_ATTRIB_COL1][3]);
+      _mesa_debug(ctx, "fog %f\n", v->attrib[FRAG_ATTRIB_FOGC][0]);
+      _mesa_debug(ctx, "index %f\n", v->attrib[FRAG_ATTRIB_CI][0]);
+      _mesa_debug(ctx, "pointsize %f\n", v->pointSize);
+      _mesa_debug(ctx, "\n");
+   }
+}