libX11 pixman mesa git update 12 Mar 2011

1 files changed, 743 insertions, 734 deletions

diff --git a/mesalib/src/mesa/main/state.c b/mesalib/src/mesa/main/state.c
index 502c42929..5651e3263 100644
--- a/mesalib/src/mesa/main/state.c
+++ b/mesalib/src/mesa/main/state.c
@@ -1,734 +1,743 @@
-/*
- * Mesa 3-D graphics library
- * Version:  7.3
- *
- * 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.
- */
-
-
-/**
- * \file state.c
- * State management.
- * 
- * This file manages recalculation of derived values in struct gl_context.
- */
-
-
-#include "glheader.h"
-#include "mtypes.h"
-#include "context.h"
-#include "debug.h"
-#include "macros.h"
-#include "ffvertex_prog.h"
-#include "framebuffer.h"
-#include "light.h"
-#include "matrix.h"
-#include "pixel.h"
-#include "program/program.h"
-#include "program/prog_parameter.h"
-#include "state.h"
-#include "stencil.h"
-#include "texenvprogram.h"
-#include "texobj.h"
-#include "texstate.h"
-
-
-static void
-update_separate_specular(struct gl_context *ctx)
-{
-   if (NEED_SECONDARY_COLOR(ctx))
-      ctx->_TriangleCaps |= DD_SEPARATE_SPECULAR;
-   else
-      ctx->_TriangleCaps &= ~DD_SEPARATE_SPECULAR;
-}
-
-
-/**
- * Compute the index of the last array element that can be safely accessed
- * in a vertex array.  We can really only do this when the array lives in
- * a VBO.
- * The array->_MaxElement field will be updated.
- * Later in glDrawArrays/Elements/etc we can do some bounds checking.
- */
-static void
-compute_max_element(struct gl_client_array *array)
-{
-   assert(array->Enabled);
-   if (array->BufferObj->Name) {
-      GLsizeiptrARB offset = (GLsizeiptrARB) array->Ptr;
-      GLsizeiptrARB obj_size = (GLsizeiptrARB) array->BufferObj->Size;
-
-      if (offset < obj_size) {
-	 array->_MaxElement = (obj_size - offset +
-			       array->StrideB -
-			       array->_ElementSize) / array->StrideB;
-      } else {
-	 array->_MaxElement = 0;
-      }
-   }
-   else {
-      /* user-space array, no idea how big it is */
-      array->_MaxElement = 2 * 1000 * 1000 * 1000; /* just a big number */
-   }
-}
-
-
-/**
- * Helper for update_arrays().
- * \return  min(current min, array->_MaxElement).
- */
-static GLuint
-update_min(GLuint min, struct gl_client_array *array)
-{
-   compute_max_element(array);
-   return MIN2(min, array->_MaxElement);
-}
-
-
-/**
- * Update ctx->Array._MaxElement (the max legal index into all enabled arrays).
- * Need to do this upon new array state or new buffer object state.
- */
-static void
-update_arrays( struct gl_context *ctx )
-{
-   struct gl_array_object *arrayObj = ctx->Array.ArrayObj;
-   GLuint i, min = ~0;
-
-   /* find min of _MaxElement values for all enabled arrays */
-
-   /* 0 */
-   if (ctx->VertexProgram._Current
-       && arrayObj->VertexAttrib[VERT_ATTRIB_POS].Enabled) {
-      min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_POS]);
-   }
-   else if (arrayObj->Vertex.Enabled) {
-      min = update_min(min, &arrayObj->Vertex);
-   }
-
-   /* 1 */
-   if (ctx->VertexProgram._Enabled
-       && arrayObj->VertexAttrib[VERT_ATTRIB_WEIGHT].Enabled) {
-      min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_WEIGHT]);
-   }
-   /* no conventional vertex weight array */
-
-   /* 2 */
-   if (ctx->VertexProgram._Enabled
-       && arrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Enabled) {
-      min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_NORMAL]);
-   }
-   else if (arrayObj->Normal.Enabled) {
-      min = update_min(min, &arrayObj->Normal);
-   }
-
-   /* 3 */
-   if (ctx->VertexProgram._Enabled
-       && arrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Enabled) {
-      min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR0]);
-   }
-   else if (arrayObj->Color.Enabled) {
-      min = update_min(min, &arrayObj->Color);
-   }
-
-   /* 4 */
-   if (ctx->VertexProgram._Enabled
-       && arrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Enabled) {
-      min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR1]);
-   }
-   else if (arrayObj->SecondaryColor.Enabled) {
-      min = update_min(min, &arrayObj->SecondaryColor);
-   }
-
-   /* 5 */
-   if (ctx->VertexProgram._Enabled
-       && arrayObj->VertexAttrib[VERT_ATTRIB_FOG].Enabled) {
-      min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_FOG]);
-   }
-   else if (arrayObj->FogCoord.Enabled) {
-      min = update_min(min, &arrayObj->FogCoord);
-   }
-
-   /* 6 */
-   if (ctx->VertexProgram._Enabled
-       && arrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Enabled) {
-      min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX]);
-   }
-   else if (arrayObj->Index.Enabled) {
-      min = update_min(min, &arrayObj->Index);
-   }
-
-   /* 7 */
-   if (ctx->VertexProgram._Enabled
-       && arrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Enabled) {
-      min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG]);
-   }
-
-   /* 8..15 */
-   for (i = VERT_ATTRIB_TEX0; i <= VERT_ATTRIB_TEX7; i++) {
-      if (ctx->VertexProgram._Enabled
-          && arrayObj->VertexAttrib[i].Enabled) {
-         min = update_min(min, &arrayObj->VertexAttrib[i]);
-      }
-      else if (i - VERT_ATTRIB_TEX0 < ctx->Const.MaxTextureCoordUnits
-               && arrayObj->TexCoord[i - VERT_ATTRIB_TEX0].Enabled) {
-         min = update_min(min, &arrayObj->TexCoord[i - VERT_ATTRIB_TEX0]);
-      }
-   }
-
-   /* 16..31 */
-   if (ctx->VertexProgram._Current) {
-      for (i = 0; i < Elements(arrayObj->VertexAttrib); i++) {
-         if (arrayObj->VertexAttrib[i].Enabled) {
-            min = update_min(min, &arrayObj->VertexAttrib[i]);
-         }
-      }
-   }
-
-   if (arrayObj->EdgeFlag.Enabled) {
-      min = update_min(min, &arrayObj->EdgeFlag);
-   }
-
-   /* _MaxElement is one past the last legal array element */
-   arrayObj->_MaxElement = min;
-}
-
-
-/**
- * Update the following fields:
- *   ctx->VertexProgram._Enabled
- *   ctx->FragmentProgram._Enabled
- *   ctx->ATIFragmentShader._Enabled
- * This needs to be done before texture state validation.
- */
-static void
-update_program_enables(struct gl_context *ctx)
-{
-   /* These _Enabled flags indicate if the program is enabled AND valid. */
-   ctx->VertexProgram._Enabled = ctx->VertexProgram.Enabled
-      && ctx->VertexProgram.Current->Base.Instructions;
-   ctx->FragmentProgram._Enabled = ctx->FragmentProgram.Enabled
-      && ctx->FragmentProgram.Current->Base.Instructions;
-   ctx->ATIFragmentShader._Enabled = ctx->ATIFragmentShader.Enabled
-      && ctx->ATIFragmentShader.Current->Instructions[0];
-}
-
-
-/**
- * Update vertex/fragment program state.  In particular, update these fields:
- *   ctx->VertexProgram._Current
- *   ctx->VertexProgram._TnlProgram,
- * These point to the highest priority enabled vertex/fragment program or are
- * NULL if fixed-function processing is to be done.
- *
- * This function needs to be called after texture state validation in case
- * we're generating a fragment program from fixed-function texture state.
- *
- * \return bitfield which will indicate _NEW_PROGRAM state if a new vertex
- * or fragment program is being used.
- */
-static GLbitfield
-update_program(struct gl_context *ctx)
-{
-   const struct gl_shader_program *vsProg = ctx->Shader.CurrentVertexProgram;
-   const struct gl_shader_program *gsProg = ctx->Shader.CurrentGeometryProgram;
-   const struct gl_shader_program *fsProg = ctx->Shader.CurrentFragmentProgram;
-   const struct gl_vertex_program *prevVP = ctx->VertexProgram._Current;
-   const struct gl_fragment_program *prevFP = ctx->FragmentProgram._Current;
-   const struct gl_geometry_program *prevGP = ctx->GeometryProgram._Current;
-   GLbitfield new_state = 0x0;
-
-   /*
-    * Set the ctx->VertexProgram._Current and ctx->FragmentProgram._Current
-    * pointers to the programs that should be used for rendering.  If either
-    * is NULL, use fixed-function code paths.
-    *
-    * These programs may come from several sources.  The priority is as
-    * follows:
-    *   1. OpenGL 2.0/ARB vertex/fragment shaders
-    *   2. ARB/NV vertex/fragment programs
-    *   3. Programs derived from fixed-function state.
-    *
-    * Note: it's possible for a vertex shader to get used with a fragment
-    * program (and vice versa) here, but in practice that shouldn't ever
-    * come up, or matter.
-    */
-
-   if (fsProg && fsProg->LinkStatus && fsProg->FragmentProgram) {
-      /* Use shader programs */
-      _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
-                               fsProg->FragmentProgram);
-   }
-   else if (ctx->FragmentProgram._Enabled) {
-      /* use user-defined vertex program */
-      _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
-                               ctx->FragmentProgram.Current);
-   }
-   else if (ctx->FragmentProgram._MaintainTexEnvProgram) {
-      /* Use fragment program generated from fixed-function state.
-       */
-      _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
-                               _mesa_get_fixed_func_fragment_program(ctx));
-      _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._TexEnvProgram,
-                               ctx->FragmentProgram._Current);
-   }
-   else {
-      /* no fragment program */
-      _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current, NULL);
-   }
-
-   if (gsProg && gsProg->LinkStatus && gsProg->GeometryProgram) {
-      /* Use shader programs */
-      _mesa_reference_geomprog(ctx, &ctx->GeometryProgram._Current,
-                               gsProg->GeometryProgram);
-   } else {
-      /* no fragment program */
-      _mesa_reference_geomprog(ctx, &ctx->GeometryProgram._Current, NULL);
-   }
-
-   /* Examine vertex program after fragment program as
-    * _mesa_get_fixed_func_vertex_program() needs to know active
-    * fragprog inputs.
-    */
-   if (vsProg && vsProg->LinkStatus && vsProg->VertexProgram) {
-      /* Use shader programs */
-      _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,
-                            vsProg->VertexProgram);
-   }
-   else if (ctx->VertexProgram._Enabled) {
-      /* use user-defined vertex program */
-      _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,
-                               ctx->VertexProgram.Current);
-   }
-   else if (ctx->VertexProgram._MaintainTnlProgram) {
-      /* Use vertex program generated from fixed-function state.
-       */
-      _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,
-                               _mesa_get_fixed_func_vertex_program(ctx));
-      _mesa_reference_vertprog(ctx, &ctx->VertexProgram._TnlProgram,
-                               ctx->VertexProgram._Current);
-   }
-   else {
-      /* no vertex program */
-      _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current, NULL);
-   }
-
-   /* Let the driver know what's happening:
-    */
-   if (ctx->FragmentProgram._Current != prevFP) {
-      new_state |= _NEW_PROGRAM;
-      if (ctx->Driver.BindProgram) {
-         ctx->Driver.BindProgram(ctx, GL_FRAGMENT_PROGRAM_ARB,
-                          (struct gl_program *) ctx->FragmentProgram._Current);
-      }
-   }
-
-   if (ctx->GeometryProgram._Current != prevGP) {
-      new_state |= _NEW_PROGRAM;
-      if (ctx->Driver.BindProgram) {
-         ctx->Driver.BindProgram(ctx, MESA_GEOMETRY_PROGRAM,
-                            (struct gl_program *) ctx->GeometryProgram._Current);
-      }
-   }
-
-   if (ctx->VertexProgram._Current != prevVP) {
-      new_state |= _NEW_PROGRAM;
-      if (ctx->Driver.BindProgram) {
-         ctx->Driver.BindProgram(ctx, GL_VERTEX_PROGRAM_ARB,
-                            (struct gl_program *) ctx->VertexProgram._Current);
-      }
-   }
-
-   return new_state;
-}
-
-
-/**
- * Examine shader constants and return either _NEW_PROGRAM_CONSTANTS or 0.
- */
-static GLbitfield
-update_program_constants(struct gl_context *ctx)
-{
-   GLbitfield new_state = 0x0;
-
-   if (ctx->FragmentProgram._Current) {
-      const struct gl_program_parameter_list *params =
-         ctx->FragmentProgram._Current->Base.Parameters;
-      if (params && params->StateFlags & ctx->NewState) {
-         new_state |= _NEW_PROGRAM_CONSTANTS;
-      }
-   }
-
-   if (ctx->GeometryProgram._Current) {
-      const struct gl_program_parameter_list *params =
-         ctx->GeometryProgram._Current->Base.Parameters;
-      /*FIXME: StateFlags is always 0 because we have unnamed constant
-       *       not state changes */
-      if (params /*&& params->StateFlags & ctx->NewState*/) {
-         new_state |= _NEW_PROGRAM_CONSTANTS;
-      }
-   }
-
-   if (ctx->VertexProgram._Current) {
-      const struct gl_program_parameter_list *params =
-         ctx->VertexProgram._Current->Base.Parameters;
-      if (params && params->StateFlags & ctx->NewState) {
-         new_state |= _NEW_PROGRAM_CONSTANTS;
-      }
-   }
-
-   return new_state;
-}
-
-
-
-
-static void
-update_viewport_matrix(struct gl_context *ctx)
-{
-   const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF;
-
-   ASSERT(depthMax > 0);
-
-   /* Compute scale and bias values. This is really driver-specific
-    * and should be maintained elsewhere if at all.
-    * NOTE: RasterPos uses this.
-    */
-   _math_matrix_viewport(&ctx->Viewport._WindowMap,
-                         ctx->Viewport.X, ctx->Viewport.Y,
-                         ctx->Viewport.Width, ctx->Viewport.Height,
-                         ctx->Viewport.Near, ctx->Viewport.Far,
-                         depthMax);
-}
-
-
-/**
- * Update derived multisample state.
- */
-static void
-update_multisample(struct gl_context *ctx)
-{
-   ctx->Multisample._Enabled = GL_FALSE;
-   if (ctx->Multisample.Enabled &&
-       ctx->DrawBuffer &&
-       ctx->DrawBuffer->Visual.sampleBuffers)
-      ctx->Multisample._Enabled = GL_TRUE;
-}
-
-
-/**
- * Update derived color/blend/logicop state.
- */
-static void
-update_color(struct gl_context *ctx)
-{
-   /* This is needed to support 1.1's RGB logic ops AND
-    * 1.0's blending logicops.
-    */
-   ctx->Color._LogicOpEnabled = RGBA_LOGICOP_ENABLED(ctx);
-}
-
-
-/*
- * Check polygon state and set DD_TRI_CULL_FRONT_BACK and/or DD_TRI_OFFSET
- * in ctx->_TriangleCaps if needed.
- */
-static void
-update_polygon(struct gl_context *ctx)
-{
-   ctx->_TriangleCaps &= ~(DD_TRI_CULL_FRONT_BACK | DD_TRI_OFFSET);
-
-   if (ctx->Polygon.CullFlag && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)
-      ctx->_TriangleCaps |= DD_TRI_CULL_FRONT_BACK;
-
-   if (   ctx->Polygon.OffsetPoint
-       || ctx->Polygon.OffsetLine
-       || ctx->Polygon.OffsetFill)
-      ctx->_TriangleCaps |= DD_TRI_OFFSET;
-}
-
-
-/**
- * Update the ctx->_TriangleCaps bitfield.
- * XXX that bitfield should really go away someday!
- * This function must be called after other update_*() functions since
- * there are dependencies on some other derived values.
- */
-#if 0
-static void
-update_tricaps(struct gl_context *ctx, GLbitfield new_state)
-{
-   ctx->_TriangleCaps = 0;
-
-   /*
-    * Points
-    */
-   if (1/*new_state & _NEW_POINT*/) {
-      if (ctx->Point.SmoothFlag)
-         ctx->_TriangleCaps |= DD_POINT_SMOOTH;
-      if (ctx->Point._Attenuated)
-         ctx->_TriangleCaps |= DD_POINT_ATTEN;
-   }
-
-   /*
-    * Lines
-    */
-   if (1/*new_state & _NEW_LINE*/) {
-      if (ctx->Line.SmoothFlag)
-         ctx->_TriangleCaps |= DD_LINE_SMOOTH;
-      if (ctx->Line.StippleFlag)
-         ctx->_TriangleCaps |= DD_LINE_STIPPLE;
-   }
-
-   /*
-    * Polygons
-    */
-   if (1/*new_state & _NEW_POLYGON*/) {
-      if (ctx->Polygon.SmoothFlag)
-         ctx->_TriangleCaps |= DD_TRI_SMOOTH;
-      if (ctx->Polygon.StippleFlag)
-         ctx->_TriangleCaps |= DD_TRI_STIPPLE;
-      if (ctx->Polygon.FrontMode != GL_FILL
-          || ctx->Polygon.BackMode != GL_FILL)
-         ctx->_TriangleCaps |= DD_TRI_UNFILLED;
-      if (ctx->Polygon.CullFlag
-          && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)
-         ctx->_TriangleCaps |= DD_TRI_CULL_FRONT_BACK;
-      if (ctx->Polygon.OffsetPoint ||
-          ctx->Polygon.OffsetLine ||
-          ctx->Polygon.OffsetFill)
-         ctx->_TriangleCaps |= DD_TRI_OFFSET;
-   }
-
-   /*
-    * Lighting and shading
-    */
-   if (ctx->Light.Enabled && ctx->Light.Model.TwoSide)
-      ctx->_TriangleCaps |= DD_TRI_LIGHT_TWOSIDE;
-   if (ctx->Light.ShadeModel == GL_FLAT)
-      ctx->_TriangleCaps |= DD_FLATSHADE;
-   if (NEED_SECONDARY_COLOR(ctx))
-      ctx->_TriangleCaps |= DD_SEPARATE_SPECULAR;
-
-   /*
-    * Stencil
-    */
-   if (ctx->Stencil._TestTwoSide)
-      ctx->_TriangleCaps |= DD_TRI_TWOSTENCIL;
-}
-#endif
-
-
-/**
- * Compute derived GL state.
- * If __struct gl_contextRec::NewState is non-zero then this function \b must
- * be called before rendering anything.
- *
- * Calls dd_function_table::UpdateState to perform any internal state
- * management necessary.
- * 
- * \sa _mesa_update_modelview_project(), _mesa_update_texture(),
- * _mesa_update_buffer_bounds(),
- * _mesa_update_lighting() and _mesa_update_tnl_spaces().
- */
-void
-_mesa_update_state_locked( struct gl_context *ctx )
-{
-   GLbitfield new_state = ctx->NewState;
-   GLbitfield prog_flags = _NEW_PROGRAM;
-   GLbitfield new_prog_state = 0x0;
-
-   if (new_state == _NEW_CURRENT_ATTRIB) 
-      goto out;
-
-   if (MESA_VERBOSE & VERBOSE_STATE)
-      _mesa_print_state("_mesa_update_state", new_state);
-
-   /* Determine which state flags effect vertex/fragment program state */
-   if (ctx->FragmentProgram._MaintainTexEnvProgram) {
-      prog_flags |= (_NEW_BUFFERS | _NEW_TEXTURE | _NEW_FOG |
-		     _NEW_ARRAY | _NEW_LIGHT | _NEW_POINT | _NEW_RENDERMODE |
-		     _NEW_PROGRAM);
-   }
-   if (ctx->VertexProgram._MaintainTnlProgram) {
-      prog_flags |= (_NEW_ARRAY | _NEW_TEXTURE | _NEW_TEXTURE_MATRIX |
-                     _NEW_TRANSFORM | _NEW_POINT |
-                     _NEW_FOG | _NEW_LIGHT |
-                     _MESA_NEW_NEED_EYE_COORDS);
-   }
-
-   /*
-    * Now update derived state info
-    */
-
-   if (new_state & prog_flags)
-      update_program_enables( ctx );
-
-   if (new_state & (_NEW_MODELVIEW|_NEW_PROJECTION))
-      _mesa_update_modelview_project( ctx, new_state );
-
-   if (new_state & (_NEW_PROGRAM|_NEW_TEXTURE|_NEW_TEXTURE_MATRIX))
-      _mesa_update_texture( ctx, new_state );
-
-   if (new_state & _NEW_BUFFERS)
-      _mesa_update_framebuffer(ctx);
-
-   if (new_state & (_NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT))
-      _mesa_update_draw_buffer_bounds( ctx );
-
-   if (new_state & _NEW_POLYGON)
-      update_polygon( ctx );
-
-   if (new_state & _NEW_LIGHT)
-      _mesa_update_lighting( ctx );
-
-   if (new_state & (_NEW_STENCIL | _NEW_BUFFERS))
-      _mesa_update_stencil( ctx );
-
-   if (new_state & _MESA_NEW_TRANSFER_STATE)
-      _mesa_update_pixel( ctx, new_state );
-
-   if (new_state & _DD_NEW_SEPARATE_SPECULAR)
-      update_separate_specular( ctx );
-
-   if (new_state & (_NEW_BUFFERS | _NEW_VIEWPORT))
-      update_viewport_matrix(ctx);
-
-   if (new_state & _NEW_MULTISAMPLE)
-      update_multisample( ctx );
-
-   if (new_state & _NEW_COLOR)
-      update_color( ctx );
-
-#if 0
-   if (new_state & (_NEW_POINT | _NEW_LINE | _NEW_POLYGON | _NEW_LIGHT
-                    | _NEW_STENCIL | _DD_NEW_SEPARATE_SPECULAR))
-      update_tricaps( ctx, new_state );
-#endif
-
-   /* ctx->_NeedEyeCoords is now up to date.
-    *
-    * If the truth value of this variable has changed, update for the
-    * new lighting space and recompute the positions of lights and the
-    * normal transform.
-    *
-    * If the lighting space hasn't changed, may still need to recompute
-    * light positions & normal transforms for other reasons.
-    */
-   if (new_state & _MESA_NEW_NEED_EYE_COORDS) 
-      _mesa_update_tnl_spaces( ctx, new_state );
-
-   if (new_state & prog_flags) {
-      /* When we generate programs from fixed-function vertex/fragment state
-       * this call may generate/bind a new program.  If so, we need to
-       * propogate the _NEW_PROGRAM flag to the driver.
-       */
-      new_prog_state |= update_program( ctx );
-   }
-
-   if (new_state & (_NEW_ARRAY | _NEW_PROGRAM | _NEW_BUFFER_OBJECT))
-      update_arrays( ctx );
-
- out:
-   new_prog_state |= update_program_constants(ctx);
-
-   /*
-    * Give the driver a chance to act upon the new_state flags.
-    * The driver might plug in different span functions, for example.
-    * Also, this is where the driver can invalidate the state of any
-    * active modules (such as swrast_setup, swrast, tnl, etc).
-    *
-    * Set ctx->NewState to zero to avoid recursion if
-    * Driver.UpdateState() has to call FLUSH_VERTICES().  (fixed?)
-    */
-   new_state = ctx->NewState | new_prog_state;
-   ctx->NewState = 0;
-   ctx->Driver.UpdateState(ctx, new_state);
-   ctx->Array.NewState = 0;
-   if (!ctx->Array.RebindArrays)
-      ctx->Array.RebindArrays = (new_state & (_NEW_ARRAY | _NEW_PROGRAM)) != 0;
-}
-
-
-/* This is the usual entrypoint for state updates:
- */
-void
-_mesa_update_state( struct gl_context *ctx )
-{
-   _mesa_lock_context_textures(ctx);
-   _mesa_update_state_locked(ctx);
-   _mesa_unlock_context_textures(ctx);
-}
-
-
-
-
-/**
- * Want to figure out which fragment program inputs are actually
- * constant/current values from ctx->Current.  These should be
- * referenced as a tracked state variable rather than a fragment
- * program input, to save the overhead of putting a constant value in
- * every submitted vertex, transferring it to hardware, interpolating
- * it across the triangle, etc...
- *
- * When there is a VP bound, just use vp->outputs.  But when we're
- * generating vp from fixed function state, basically want to
- * calculate:
- *
- * vp_out_2_fp_in( vp_in_2_vp_out( varying_inputs ) | 
- *                 potential_vp_outputs )
- *
- * Where potential_vp_outputs is calculated by looking at enabled
- * texgen, etc.
- * 
- * The generated fragment program should then only declare inputs that
- * may vary or otherwise differ from the ctx->Current values.
- * Otherwise, the fp should track them as state values instead.
- */
-void
-_mesa_set_varying_vp_inputs( struct gl_context *ctx,
-                             GLbitfield varying_inputs )
-{
-   if (ctx->varying_vp_inputs != varying_inputs) {
-      ctx->varying_vp_inputs = varying_inputs;
-      ctx->NewState |= _NEW_ARRAY;
-      /*printf("%s %x\n", __FUNCTION__, varying_inputs);*/
-   }
-}
-
-
-/**
- * Used by drivers to tell core Mesa that the driver is going to
- * install/ use its own vertex program.  In particular, this will
- * prevent generated fragment programs from using state vars instead
- * of ordinary varyings/inputs.
- */
-void
-_mesa_set_vp_override(struct gl_context *ctx, GLboolean flag)
-{
-   if (ctx->VertexProgram._Overriden != flag) {
-      ctx->VertexProgram._Overriden = flag;
-
-      /* Set one of the bits which will trigger fragment program
-       * regeneration:
-       */
-      ctx->NewState |= _NEW_PROGRAM;
-   }
-}
+/*

+ * Mesa 3-D graphics library

+ * Version:  7.3

+ *

+ * 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.

+ */

+

+

+/**

+ * \file state.c

+ * State management.

+ * 

+ * This file manages recalculation of derived values in struct gl_context.

+ */

+

+

+#include "glheader.h"

+#include "mtypes.h"

+#include "context.h"

+#include "debug.h"

+#include "macros.h"

+#include "ffvertex_prog.h"

+#include "framebuffer.h"

+#include "light.h"

+#include "matrix.h"

+#include "pixel.h"

+#include "program/program.h"

+#include "program/prog_parameter.h"

+#include "shaderobj.h"

+#include "state.h"

+#include "stencil.h"

+#include "texenvprogram.h"

+#include "texobj.h"

+#include "texstate.h"

+

+

+static void

+update_separate_specular(struct gl_context *ctx)

+{

+   if (_mesa_need_secondary_color(ctx))

+      ctx->_TriangleCaps |= DD_SEPARATE_SPECULAR;

+   else

+      ctx->_TriangleCaps &= ~DD_SEPARATE_SPECULAR;

+}

+

+

+/**

+ * Compute the index of the last array element that can be safely accessed

+ * in a vertex array.  We can really only do this when the array lives in

+ * a VBO.

+ * The array->_MaxElement field will be updated.

+ * Later in glDrawArrays/Elements/etc we can do some bounds checking.

+ */

+static void

+compute_max_element(struct gl_client_array *array)

+{

+   assert(array->Enabled);

+   if (array->BufferObj->Name) {

+      GLsizeiptrARB offset = (GLsizeiptrARB) array->Ptr;

+      GLsizeiptrARB obj_size = (GLsizeiptrARB) array->BufferObj->Size;

+

+      if (offset < obj_size) {

+	 array->_MaxElement = (obj_size - offset +

+			       array->StrideB -

+			       array->_ElementSize) / array->StrideB;

+      } else {

+	 array->_MaxElement = 0;

+      }

+   }

+   else {

+      /* user-space array, no idea how big it is */

+      array->_MaxElement = 2 * 1000 * 1000 * 1000; /* just a big number */

+   }

+}

+

+

+/**

+ * Helper for update_arrays().

+ * \return  min(current min, array->_MaxElement).

+ */

+static GLuint

+update_min(GLuint min, struct gl_client_array *array)

+{

+   compute_max_element(array);

+   return MIN2(min, array->_MaxElement);

+}

+

+

+/**

+ * Update ctx->Array._MaxElement (the max legal index into all enabled arrays).

+ * Need to do this upon new array state or new buffer object state.

+ */

+static void

+update_arrays( struct gl_context *ctx )

+{

+   struct gl_array_object *arrayObj = ctx->Array.ArrayObj;

+   GLuint i, min = ~0;

+

+   /* find min of _MaxElement values for all enabled arrays */

+

+   /* 0 */

+   if (ctx->VertexProgram._Current

+       && arrayObj->VertexAttrib[VERT_ATTRIB_POS].Enabled) {

+      min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_POS]);

+   }

+   else if (arrayObj->Vertex.Enabled) {

+      min = update_min(min, &arrayObj->Vertex);

+   }

+

+   /* 1 */

+   if (ctx->VertexProgram._Enabled

+       && arrayObj->VertexAttrib[VERT_ATTRIB_WEIGHT].Enabled) {

+      min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_WEIGHT]);

+   }

+   /* no conventional vertex weight array */

+

+   /* 2 */

+   if (ctx->VertexProgram._Enabled

+       && arrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Enabled) {

+      min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_NORMAL]);

+   }

+   else if (arrayObj->Normal.Enabled) {

+      min = update_min(min, &arrayObj->Normal);

+   }

+

+   /* 3 */

+   if (ctx->VertexProgram._Enabled

+       && arrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Enabled) {

+      min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR0]);

+   }

+   else if (arrayObj->Color.Enabled) {

+      min = update_min(min, &arrayObj->Color);

+   }

+

+   /* 4 */

+   if (ctx->VertexProgram._Enabled

+       && arrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Enabled) {

+      min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR1]);

+   }

+   else if (arrayObj->SecondaryColor.Enabled) {

+      min = update_min(min, &arrayObj->SecondaryColor);

+   }

+

+   /* 5 */

+   if (ctx->VertexProgram._Enabled

+       && arrayObj->VertexAttrib[VERT_ATTRIB_FOG].Enabled) {

+      min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_FOG]);

+   }

+   else if (arrayObj->FogCoord.Enabled) {

+      min = update_min(min, &arrayObj->FogCoord);

+   }

+

+   /* 6 */

+   if (ctx->VertexProgram._Enabled

+       && arrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Enabled) {

+      min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX]);

+   }

+   else if (arrayObj->Index.Enabled) {

+      min = update_min(min, &arrayObj->Index);

+   }

+

+   /* 7 */

+   if (ctx->VertexProgram._Enabled

+       && arrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Enabled) {

+      min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG]);

+   }

+

+   /* 8..15 */

+   for (i = VERT_ATTRIB_TEX0; i <= VERT_ATTRIB_TEX7; i++) {

+      if (ctx->VertexProgram._Enabled

+          && arrayObj->VertexAttrib[i].Enabled) {

+         min = update_min(min, &arrayObj->VertexAttrib[i]);

+      }

+      else if (i - VERT_ATTRIB_TEX0 < ctx->Const.MaxTextureCoordUnits

+               && arrayObj->TexCoord[i - VERT_ATTRIB_TEX0].Enabled) {

+         min = update_min(min, &arrayObj->TexCoord[i - VERT_ATTRIB_TEX0]);

+      }

+   }

+

+   /* 16..31 */

+   if (ctx->VertexProgram._Current) {

+      for (i = 0; i < Elements(arrayObj->VertexAttrib); i++) {

+         if (arrayObj->VertexAttrib[i].Enabled) {

+            min = update_min(min, &arrayObj->VertexAttrib[i]);

+         }

+      }

+   }

+

+   if (arrayObj->EdgeFlag.Enabled) {

+      min = update_min(min, &arrayObj->EdgeFlag);

+   }

+

+   /* _MaxElement is one past the last legal array element */

+   arrayObj->_MaxElement = min;

+}

+

+

+/**

+ * Update the following fields:

+ *   ctx->VertexProgram._Enabled

+ *   ctx->FragmentProgram._Enabled

+ *   ctx->ATIFragmentShader._Enabled

+ * This needs to be done before texture state validation.

+ */

+static void

+update_program_enables(struct gl_context *ctx)

+{

+   /* These _Enabled flags indicate if the program is enabled AND valid. */

+   ctx->VertexProgram._Enabled = ctx->VertexProgram.Enabled

+      && ctx->VertexProgram.Current->Base.Instructions;

+   ctx->FragmentProgram._Enabled = ctx->FragmentProgram.Enabled

+      && ctx->FragmentProgram.Current->Base.Instructions;

+   ctx->ATIFragmentShader._Enabled = ctx->ATIFragmentShader.Enabled

+      && ctx->ATIFragmentShader.Current->Instructions[0];

+}

+

+

+/**

+ * Update vertex/fragment program state.  In particular, update these fields:

+ *   ctx->VertexProgram._Current

+ *   ctx->VertexProgram._TnlProgram,

+ * These point to the highest priority enabled vertex/fragment program or are

+ * NULL if fixed-function processing is to be done.

+ *

+ * This function needs to be called after texture state validation in case

+ * we're generating a fragment program from fixed-function texture state.

+ *

+ * \return bitfield which will indicate _NEW_PROGRAM state if a new vertex

+ * or fragment program is being used.

+ */

+static GLbitfield

+update_program(struct gl_context *ctx)

+{

+   const struct gl_shader_program *vsProg = ctx->Shader.CurrentVertexProgram;

+   const struct gl_shader_program *gsProg = ctx->Shader.CurrentGeometryProgram;

+   struct gl_shader_program *fsProg = ctx->Shader.CurrentFragmentProgram;

+   const struct gl_vertex_program *prevVP = ctx->VertexProgram._Current;

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

+   const struct gl_geometry_program *prevGP = ctx->GeometryProgram._Current;

+   GLbitfield new_state = 0x0;

+

+   /*

+    * Set the ctx->VertexProgram._Current and ctx->FragmentProgram._Current

+    * pointers to the programs that should be used for rendering.  If either

+    * is NULL, use fixed-function code paths.

+    *

+    * These programs may come from several sources.  The priority is as

+    * follows:

+    *   1. OpenGL 2.0/ARB vertex/fragment shaders

+    *   2. ARB/NV vertex/fragment programs

+    *   3. Programs derived from fixed-function state.

+    *

+    * Note: it's possible for a vertex shader to get used with a fragment

+    * program (and vice versa) here, but in practice that shouldn't ever

+    * come up, or matter.

+    */

+

+   if (fsProg && fsProg->LinkStatus && fsProg->FragmentProgram) {

+      /* Use shader programs */

+      _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,

+                               fsProg->FragmentProgram);

+      _mesa_reference_shader_program(ctx, &ctx->Shader._CurrentFragmentProgram,

+				     fsProg);

+   }

+   else if (ctx->FragmentProgram._Enabled) {

+      /* use user-defined fragment program */

+      _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,

+                               ctx->FragmentProgram.Current);

+      _mesa_reference_shader_program(ctx, &ctx->Shader._CurrentFragmentProgram,

+				     NULL);

+   }

+   else if (ctx->FragmentProgram._MaintainTexEnvProgram) {

+      /* Use fragment program generated from fixed-function state.

+       */

+      struct gl_shader_program *f = _mesa_get_fixed_func_fragment_program(ctx);

+      _mesa_reference_shader_program(ctx,

+				     &ctx->Shader._CurrentFragmentProgram, f);

+

+      _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,

+                               f->FragmentProgram);

+   }

+   else {

+      /* no fragment program */

+      _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current, NULL);

+      _mesa_reference_shader_program(ctx, &ctx->Shader._CurrentFragmentProgram,

+				     NULL);

+   }

+

+   if (gsProg && gsProg->LinkStatus && gsProg->GeometryProgram) {

+      /* Use shader programs */

+      _mesa_reference_geomprog(ctx, &ctx->GeometryProgram._Current,

+                               gsProg->GeometryProgram);

+   } else {

+      /* no fragment program */

+      _mesa_reference_geomprog(ctx, &ctx->GeometryProgram._Current, NULL);

+   }

+

+   /* Examine vertex program after fragment program as

+    * _mesa_get_fixed_func_vertex_program() needs to know active

+    * fragprog inputs.

+    */

+   if (vsProg && vsProg->LinkStatus && vsProg->VertexProgram) {

+      /* Use shader programs */

+      _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,

+                            vsProg->VertexProgram);

+   }

+   else if (ctx->VertexProgram._Enabled) {

+      /* use user-defined vertex program */

+      _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,

+                               ctx->VertexProgram.Current);

+   }

+   else if (ctx->VertexProgram._MaintainTnlProgram) {

+      /* Use vertex program generated from fixed-function state.

+       */

+      _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,

+                               _mesa_get_fixed_func_vertex_program(ctx));

+      _mesa_reference_vertprog(ctx, &ctx->VertexProgram._TnlProgram,

+                               ctx->VertexProgram._Current);

+   }

+   else {

+      /* no vertex program */

+      _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current, NULL);

+   }

+

+   /* Let the driver know what's happening:

+    */

+   if (ctx->FragmentProgram._Current != prevFP) {

+      new_state |= _NEW_PROGRAM;

+      if (ctx->Driver.BindProgram) {

+         ctx->Driver.BindProgram(ctx, GL_FRAGMENT_PROGRAM_ARB,

+                          (struct gl_program *) ctx->FragmentProgram._Current);

+      }

+   }

+

+   if (ctx->GeometryProgram._Current != prevGP) {

+      new_state |= _NEW_PROGRAM;

+      if (ctx->Driver.BindProgram) {

+         ctx->Driver.BindProgram(ctx, MESA_GEOMETRY_PROGRAM,

+                            (struct gl_program *) ctx->GeometryProgram._Current);

+      }

+   }

+

+   if (ctx->VertexProgram._Current != prevVP) {

+      new_state |= _NEW_PROGRAM;

+      if (ctx->Driver.BindProgram) {

+         ctx->Driver.BindProgram(ctx, GL_VERTEX_PROGRAM_ARB,

+                            (struct gl_program *) ctx->VertexProgram._Current);

+      }

+   }

+

+   return new_state;

+}

+

+

+/**

+ * Examine shader constants and return either _NEW_PROGRAM_CONSTANTS or 0.

+ */

+static GLbitfield

+update_program_constants(struct gl_context *ctx)

+{

+   GLbitfield new_state = 0x0;

+

+   if (ctx->FragmentProgram._Current) {

+      const struct gl_program_parameter_list *params =

+         ctx->FragmentProgram._Current->Base.Parameters;

+      if (params && params->StateFlags & ctx->NewState) {

+         new_state |= _NEW_PROGRAM_CONSTANTS;

+      }

+   }

+

+   if (ctx->GeometryProgram._Current) {

+      const struct gl_program_parameter_list *params =

+         ctx->GeometryProgram._Current->Base.Parameters;

+      /*FIXME: StateFlags is always 0 because we have unnamed constant

+       *       not state changes */

+      if (params /*&& params->StateFlags & ctx->NewState*/) {

+         new_state |= _NEW_PROGRAM_CONSTANTS;

+      }

+   }

+

+   if (ctx->VertexProgram._Current) {

+      const struct gl_program_parameter_list *params =

+         ctx->VertexProgram._Current->Base.Parameters;

+      if (params && params->StateFlags & ctx->NewState) {

+         new_state |= _NEW_PROGRAM_CONSTANTS;

+      }

+   }

+

+   return new_state;

+}

+

+

+

+

+static void

+update_viewport_matrix(struct gl_context *ctx)

+{

+   const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF;

+

+   ASSERT(depthMax > 0);

+

+   /* Compute scale and bias values. This is really driver-specific

+    * and should be maintained elsewhere if at all.

+    * NOTE: RasterPos uses this.

+    */

+   _math_matrix_viewport(&ctx->Viewport._WindowMap,

+                         ctx->Viewport.X, ctx->Viewport.Y,

+                         ctx->Viewport.Width, ctx->Viewport.Height,

+                         ctx->Viewport.Near, ctx->Viewport.Far,

+                         depthMax);

+}

+

+

+/**

+ * Update derived multisample state.

+ */

+static void

+update_multisample(struct gl_context *ctx)

+{

+   ctx->Multisample._Enabled = GL_FALSE;

+   if (ctx->Multisample.Enabled &&

+       ctx->DrawBuffer &&

+       ctx->DrawBuffer->Visual.sampleBuffers)

+      ctx->Multisample._Enabled = GL_TRUE;

+}

+

+

+/**

+ * Update derived color/blend/logicop state.

+ */

+static void

+update_color(struct gl_context *ctx)

+{

+   /* This is needed to support 1.1's RGB logic ops AND

+    * 1.0's blending logicops.

+    */

+   ctx->Color._LogicOpEnabled = _mesa_rgba_logicop_enabled(ctx);

+}

+

+

+/*

+ * Check polygon state and set DD_TRI_CULL_FRONT_BACK and/or DD_TRI_OFFSET

+ * in ctx->_TriangleCaps if needed.

+ */

+static void

+update_polygon(struct gl_context *ctx)

+{

+   ctx->_TriangleCaps &= ~(DD_TRI_CULL_FRONT_BACK | DD_TRI_OFFSET);

+

+   if (ctx->Polygon.CullFlag && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)

+      ctx->_TriangleCaps |= DD_TRI_CULL_FRONT_BACK;

+

+   if (   ctx->Polygon.OffsetPoint

+       || ctx->Polygon.OffsetLine

+       || ctx->Polygon.OffsetFill)

+      ctx->_TriangleCaps |= DD_TRI_OFFSET;

+}

+

+

+/**

+ * Update the ctx->_TriangleCaps bitfield.

+ * XXX that bitfield should really go away someday!

+ * This function must be called after other update_*() functions since

+ * there are dependencies on some other derived values.

+ */

+#if 0

+static void

+update_tricaps(struct gl_context *ctx, GLbitfield new_state)

+{

+   ctx->_TriangleCaps = 0;

+

+   /*

+    * Points

+    */

+   if (1/*new_state & _NEW_POINT*/) {

+      if (ctx->Point.SmoothFlag)

+         ctx->_TriangleCaps |= DD_POINT_SMOOTH;

+      if (ctx->Point._Attenuated)

+         ctx->_TriangleCaps |= DD_POINT_ATTEN;

+   }

+

+   /*

+    * Lines

+    */

+   if (1/*new_state & _NEW_LINE*/) {

+      if (ctx->Line.SmoothFlag)

+         ctx->_TriangleCaps |= DD_LINE_SMOOTH;

+      if (ctx->Line.StippleFlag)

+         ctx->_TriangleCaps |= DD_LINE_STIPPLE;

+   }

+

+   /*

+    * Polygons

+    */

+   if (1/*new_state & _NEW_POLYGON*/) {

+      if (ctx->Polygon.SmoothFlag)

+         ctx->_TriangleCaps |= DD_TRI_SMOOTH;

+      if (ctx->Polygon.StippleFlag)

+         ctx->_TriangleCaps |= DD_TRI_STIPPLE;

+      if (ctx->Polygon.FrontMode != GL_FILL

+          || ctx->Polygon.BackMode != GL_FILL)

+         ctx->_TriangleCaps |= DD_TRI_UNFILLED;

+      if (ctx->Polygon.CullFlag

+          && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)

+         ctx->_TriangleCaps |= DD_TRI_CULL_FRONT_BACK;

+      if (ctx->Polygon.OffsetPoint ||

+          ctx->Polygon.OffsetLine ||

+          ctx->Polygon.OffsetFill)

+         ctx->_TriangleCaps |= DD_TRI_OFFSET;

+   }

+

+   /*

+    * Lighting and shading

+    */

+   if (ctx->Light.Enabled && ctx->Light.Model.TwoSide)

+      ctx->_TriangleCaps |= DD_TRI_LIGHT_TWOSIDE;

+   if (ctx->Light.ShadeModel == GL_FLAT)

+      ctx->_TriangleCaps |= DD_FLATSHADE;

+   if (_mesa_need_secondary_color(ctx))

+      ctx->_TriangleCaps |= DD_SEPARATE_SPECULAR;

+

+   /*

+    * Stencil

+    */

+   if (ctx->Stencil._TestTwoSide)

+      ctx->_TriangleCaps |= DD_TRI_TWOSTENCIL;

+}

+#endif

+

+

+/**

+ * Compute derived GL state.

+ * If __struct gl_contextRec::NewState is non-zero then this function \b must

+ * be called before rendering anything.

+ *

+ * Calls dd_function_table::UpdateState to perform any internal state

+ * management necessary.

+ * 

+ * \sa _mesa_update_modelview_project(), _mesa_update_texture(),

+ * _mesa_update_buffer_bounds(),

+ * _mesa_update_lighting() and _mesa_update_tnl_spaces().

+ */

+void

+_mesa_update_state_locked( struct gl_context *ctx )

+{

+   GLbitfield new_state = ctx->NewState;

+   GLbitfield prog_flags = _NEW_PROGRAM;

+   GLbitfield new_prog_state = 0x0;

+

+   if (new_state == _NEW_CURRENT_ATTRIB) 

+      goto out;

+

+   if (MESA_VERBOSE & VERBOSE_STATE)

+      _mesa_print_state("_mesa_update_state", new_state);

+

+   /* Determine which state flags effect vertex/fragment program state */

+   if (ctx->FragmentProgram._MaintainTexEnvProgram) {

+      prog_flags |= (_NEW_BUFFERS | _NEW_TEXTURE | _NEW_FOG |

+		     _NEW_ARRAY | _NEW_LIGHT | _NEW_POINT | _NEW_RENDERMODE |

+		     _NEW_PROGRAM);

+   }

+   if (ctx->VertexProgram._MaintainTnlProgram) {

+      prog_flags |= (_NEW_ARRAY | _NEW_TEXTURE | _NEW_TEXTURE_MATRIX |

+                     _NEW_TRANSFORM | _NEW_POINT |

+                     _NEW_FOG | _NEW_LIGHT |

+                     _MESA_NEW_NEED_EYE_COORDS);

+   }

+

+   /*

+    * Now update derived state info

+    */

+

+   if (new_state & prog_flags)

+      update_program_enables( ctx );

+

+   if (new_state & (_NEW_MODELVIEW|_NEW_PROJECTION))

+      _mesa_update_modelview_project( ctx, new_state );

+

+   if (new_state & (_NEW_PROGRAM|_NEW_TEXTURE|_NEW_TEXTURE_MATRIX))

+      _mesa_update_texture( ctx, new_state );

+

+   if (new_state & _NEW_BUFFERS)

+      _mesa_update_framebuffer(ctx);

+

+   if (new_state & (_NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT))

+      _mesa_update_draw_buffer_bounds( ctx );

+

+   if (new_state & _NEW_POLYGON)

+      update_polygon( ctx );

+

+   if (new_state & _NEW_LIGHT)

+      _mesa_update_lighting( ctx );

+

+   if (new_state & (_NEW_STENCIL | _NEW_BUFFERS))

+      _mesa_update_stencil( ctx );

+

+   if (new_state & _MESA_NEW_TRANSFER_STATE)

+      _mesa_update_pixel( ctx, new_state );

+

+   if (new_state & _DD_NEW_SEPARATE_SPECULAR)

+      update_separate_specular( ctx );

+

+   if (new_state & (_NEW_BUFFERS | _NEW_VIEWPORT))

+      update_viewport_matrix(ctx);

+

+   if (new_state & _NEW_MULTISAMPLE)

+      update_multisample( ctx );

+

+   if (new_state & _NEW_COLOR)

+      update_color( ctx );

+

+#if 0

+   if (new_state & (_NEW_POINT | _NEW_LINE | _NEW_POLYGON | _NEW_LIGHT

+                    | _NEW_STENCIL | _DD_NEW_SEPARATE_SPECULAR))

+      update_tricaps( ctx, new_state );

+#endif

+

+   /* ctx->_NeedEyeCoords is now up to date.

+    *

+    * If the truth value of this variable has changed, update for the

+    * new lighting space and recompute the positions of lights and the

+    * normal transform.

+    *

+    * If the lighting space hasn't changed, may still need to recompute

+    * light positions & normal transforms for other reasons.

+    */

+   if (new_state & _MESA_NEW_NEED_EYE_COORDS) 

+      _mesa_update_tnl_spaces( ctx, new_state );

+

+   if (new_state & prog_flags) {

+      /* When we generate programs from fixed-function vertex/fragment state

+       * this call may generate/bind a new program.  If so, we need to

+       * propogate the _NEW_PROGRAM flag to the driver.

+       */

+      new_prog_state |= update_program( ctx );

+   }

+

+   if (new_state & (_NEW_ARRAY | _NEW_PROGRAM | _NEW_BUFFER_OBJECT))

+      update_arrays( ctx );

+

+ out:

+   new_prog_state |= update_program_constants(ctx);

+

+   /*

+    * Give the driver a chance to act upon the new_state flags.

+    * The driver might plug in different span functions, for example.

+    * Also, this is where the driver can invalidate the state of any

+    * active modules (such as swrast_setup, swrast, tnl, etc).

+    *

+    * Set ctx->NewState to zero to avoid recursion if

+    * Driver.UpdateState() has to call FLUSH_VERTICES().  (fixed?)

+    */

+   new_state = ctx->NewState | new_prog_state;

+   ctx->NewState = 0;

+   ctx->Driver.UpdateState(ctx, new_state);

+   ctx->Array.NewState = 0;

+   if (!ctx->Array.RebindArrays)

+      ctx->Array.RebindArrays = (new_state & (_NEW_ARRAY | _NEW_PROGRAM)) != 0;

+}

+

+

+/* This is the usual entrypoint for state updates:

+ */

+void

+_mesa_update_state( struct gl_context *ctx )

+{

+   _mesa_lock_context_textures(ctx);

+   _mesa_update_state_locked(ctx);

+   _mesa_unlock_context_textures(ctx);

+}

+

+

+

+

+/**

+ * Want to figure out which fragment program inputs are actually

+ * constant/current values from ctx->Current.  These should be

+ * referenced as a tracked state variable rather than a fragment

+ * program input, to save the overhead of putting a constant value in

+ * every submitted vertex, transferring it to hardware, interpolating

+ * it across the triangle, etc...

+ *

+ * When there is a VP bound, just use vp->outputs.  But when we're

+ * generating vp from fixed function state, basically want to

+ * calculate:

+ *

+ * vp_out_2_fp_in( vp_in_2_vp_out( varying_inputs ) | 

+ *                 potential_vp_outputs )

+ *

+ * Where potential_vp_outputs is calculated by looking at enabled

+ * texgen, etc.

+ * 

+ * The generated fragment program should then only declare inputs that

+ * may vary or otherwise differ from the ctx->Current values.

+ * Otherwise, the fp should track them as state values instead.

+ */

+void

+_mesa_set_varying_vp_inputs( struct gl_context *ctx,

+                             GLbitfield varying_inputs )

+{

+   if (ctx->varying_vp_inputs != varying_inputs) {

+      ctx->varying_vp_inputs = varying_inputs;

+      ctx->NewState |= _NEW_ARRAY;

+      /*printf("%s %x\n", __FUNCTION__, varying_inputs);*/

+   }

+}

+

+

+/**

+ * Used by drivers to tell core Mesa that the driver is going to

+ * install/ use its own vertex program.  In particular, this will

+ * prevent generated fragment programs from using state vars instead

+ * of ordinary varyings/inputs.

+ */

+void

+_mesa_set_vp_override(struct gl_context *ctx, GLboolean flag)

+{

+   if (ctx->VertexProgram._Overriden != flag) {

+      ctx->VertexProgram._Overriden = flag;

+

+      /* Set one of the bits which will trigger fragment program

+       * regeneration:

+       */

+      ctx->NewState |= _NEW_PROGRAM;

+   }

+}