xserver and mesa git update 28-12-2010

1 files changed, 571 insertions, 569 deletions

diff --git a/mesalib/src/mesa/tnl/t_vb_program.c b/mesalib/src/mesa/tnl/t_vb_program.c
index f3a338ef1..ea5717a7a 100644
--- a/mesalib/src/mesa/tnl/t_vb_program.c
+++ b/mesalib/src/mesa/tnl/t_vb_program.c
@@ -1,569 +1,571 @@
-/*
- * Mesa 3-D graphics library
- * Version:  7.6
- *
- * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
- * Copyright (C) 2009  VMware, Inc.  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 tnl/t_vb_program.c
- * \brief Pipeline stage for executing vertex programs.
- * \author Brian Paul,  Keith Whitwell
- */
-
-
-#include "main/glheader.h"
-#include "main/colormac.h"
-#include "main/macros.h"
-#include "main/imports.h"
-#include "math/m_xform.h"
-#include "program/prog_instruction.h"
-#include "program/prog_statevars.h"
-#include "program/prog_execute.h"
-#include "swrast/s_context.h"
-
-#include "tnl/tnl.h"
-#include "tnl/t_context.h"
-#include "tnl/t_pipeline.h"
-
-
-#ifdef NAN_CHECK
-/** Check for NaNs and very large values */
-static INLINE void
-check_float(float x)
-{
-   assert(!IS_INF_OR_NAN(x));
-   assert(1.0e-15 <= x && x <= 1.0e15);
-}
-#endif
-
-
-/*!
- * Private storage for the vertex program pipeline stage.
- */
-struct vp_stage_data {
-   /** The results of running the vertex program go into these arrays. */
-   GLvector4f results[VERT_RESULT_MAX];
-
-   GLvector4f ndcCoords;              /**< normalized device coords */
-   GLubyte *clipmask;                 /**< clip flags */
-   GLubyte ormask, andmask;           /**< for clipping */
-};
-
-
-#define VP_STAGE_DATA(stage) ((struct vp_stage_data *)(stage->privatePtr))
-
-
-static void
-userclip( GLcontext *ctx,
-          GLvector4f *clip,
-          GLubyte *clipmask,
-          GLubyte *clipormask,
-          GLubyte *clipandmask )
-{
-   GLuint p;
-
-   for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
-      if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
-	 GLuint nr, i;
-	 const GLfloat a = ctx->Transform._ClipUserPlane[p][0];
-	 const GLfloat b = ctx->Transform._ClipUserPlane[p][1];
-	 const GLfloat c = ctx->Transform._ClipUserPlane[p][2];
-	 const GLfloat d = ctx->Transform._ClipUserPlane[p][3];
-         GLfloat *coord = (GLfloat *)clip->data;
-         GLuint stride = clip->stride;
-         GLuint count = clip->count;
-
-	 for (nr = 0, i = 0 ; i < count ; i++) {
-	    GLfloat dp = (coord[0] * a + 
-			  coord[1] * b +
-			  coord[2] * c +
-			  coord[3] * d);
-
-	    if (dp < 0) {
-	       nr++;
-	       clipmask[i] |= CLIP_USER_BIT;
-	    }
-
-	    STRIDE_F(coord, stride);
-	 }
-
-	 if (nr > 0) {
-	    *clipormask |= CLIP_USER_BIT;
-	    if (nr == count) {
-	       *clipandmask |= CLIP_USER_BIT;
-	       return;
-	    }
-	 }
-      }
-   }
-}
-
-
-static GLboolean
-do_ndc_cliptest(GLcontext *ctx, struct vp_stage_data *store)
-{
-   TNLcontext *tnl = TNL_CONTEXT(ctx);
-   struct vertex_buffer *VB = &tnl->vb;
-   /* Cliptest and perspective divide.  Clip functions must clear
-    * the clipmask.
-    */
-   store->ormask = 0;
-   store->andmask = CLIP_FRUSTUM_BITS;
-
-   tnl_clip_prepare(ctx);
-
-   if (tnl->NeedNdcCoords) {
-      VB->NdcPtr =
-         _mesa_clip_tab[VB->ClipPtr->size]( VB->ClipPtr,
-                                            &store->ndcCoords,
-                                            store->clipmask,
-                                            &store->ormask,
-                                            &store->andmask,
-					    !ctx->Transform.DepthClamp );
-   }
-   else {
-      VB->NdcPtr = NULL;
-      _mesa_clip_np_tab[VB->ClipPtr->size]( VB->ClipPtr,
-                                            NULL,
-                                            store->clipmask,
-                                            &store->ormask,
-                                            &store->andmask,
-					    !ctx->Transform.DepthClamp );
-   }
-
-   if (store->andmask) {
-      /* All vertices are outside the frustum */
-      return GL_FALSE;
-   }
-
-   /* Test userclip planes.  This contributes to VB->ClipMask.
-    */
-   /** XXX NEW_SLANG _Enabled ??? */
-   if (ctx->Transform.ClipPlanesEnabled && (!ctx->VertexProgram._Enabled ||
-      ctx->VertexProgram.Current->IsPositionInvariant)) {
-      userclip( ctx,
-		VB->ClipPtr,
-		store->clipmask,
-		&store->ormask,
-		&store->andmask );
-
-      if (store->andmask) {
-	 return GL_FALSE;
-      }
-   }
-
-   VB->ClipAndMask = store->andmask;
-   VB->ClipOrMask = store->ormask;
-   VB->ClipMask = store->clipmask;
-
-   return GL_TRUE;
-}
-
-
-/**
- * XXX the texture sampling code in this module is a bit of a hack.
- * The texture sampling code is in swrast, though it doesn't have any
- * real dependencies on the rest of swrast.  It should probably be
- * moved into main/ someday.
- */
-static void
-vp_fetch_texel(GLcontext *ctx, const GLfloat texcoord[4], GLfloat lambda,
-               GLuint unit, GLfloat color[4])
-{
-   SWcontext *swrast = SWRAST_CONTEXT(ctx);
-
-   /* XXX use a float-valued TextureSample routine here!!! */
-   swrast->TextureSample[unit](ctx, ctx->Texture.Unit[unit]._Current,
-                               1, (const GLfloat (*)[4]) texcoord,
-                               &lambda,  (GLfloat (*)[4]) color);
-}
-
-
-/**
- * Called via ctx->Driver.ProgramStringNotify() after a new vertex program
- * string has been parsed.
- */
-GLboolean
-_tnl_program_string(GLcontext *ctx, GLenum target, struct gl_program *program)
-{
-   /* No-op.
-    * If we had derived anything from the program that was private to this
-    * stage we'd recompute/validate it here.
-    */
-   return GL_TRUE;
-}
-
-
-/**
- * Initialize virtual machine state prior to executing vertex program.
- */
-static void
-init_machine(GLcontext *ctx, struct gl_program_machine *machine)
-{
-   /* Input registers get initialized from the current vertex attribs */
-   memcpy(machine->VertAttribs, ctx->Current.Attrib,
-          MAX_VERTEX_GENERIC_ATTRIBS * 4 * sizeof(GLfloat));
-
-   if (ctx->VertexProgram._Current->IsNVProgram) {
-      GLuint i;
-      /* Output/result regs are initialized to [0,0,0,1] */
-      for (i = 0; i < MAX_NV_VERTEX_PROGRAM_OUTPUTS; i++) {
-         ASSIGN_4V(machine->Outputs[i], 0.0F, 0.0F, 0.0F, 1.0F);
-      }
-      /* Temp regs are initialized to [0,0,0,0] */
-      for (i = 0; i < MAX_NV_VERTEX_PROGRAM_TEMPS; i++) {
-         ASSIGN_4V(machine->Temporaries[i], 0.0F, 0.0F, 0.0F, 0.0F);
-      }
-      for (i = 0; i < MAX_VERTEX_PROGRAM_ADDRESS_REGS; i++) {
-         ASSIGN_4V(machine->AddressReg[i], 0, 0, 0, 0);
-      }
-   }
-
-   machine->NumDeriv = 0;
-
-   /* init condition codes */
-   machine->CondCodes[0] = COND_EQ;
-   machine->CondCodes[1] = COND_EQ;
-   machine->CondCodes[2] = COND_EQ;
-   machine->CondCodes[3] = COND_EQ;
-
-   /* init call stack */
-   machine->StackDepth = 0;
-
-   machine->FetchTexelLod = vp_fetch_texel;
-   machine->FetchTexelDeriv = NULL; /* not used by vertex programs */
-
-   machine->Samplers = ctx->VertexProgram._Current->Base.SamplerUnits;
-}
-
-
-/**
- * Map the texture images which the vertex program will access (if any).
- */
-static void
-map_textures(GLcontext *ctx, const struct gl_vertex_program *vp)
-{
-   GLuint u;
-
-   if (!ctx->Driver.MapTexture)
-      return;
-
-   for (u = 0; u < ctx->Const.MaxVertexTextureImageUnits; u++) {
-      if (vp->Base.TexturesUsed[u]) {
-         /* Note: _Current *should* correspond to the target indicated
-          * in TexturesUsed[u].
-          */
-         ctx->Driver.MapTexture(ctx, ctx->Texture.Unit[u]._Current);
-      }
-   }
-}
-
-
-/**
- * Unmap the texture images which were used by the vertex program (if any).
- */
-static void
-unmap_textures(GLcontext *ctx, const struct gl_vertex_program *vp)
-{
-   GLuint u;
-
-   if (!ctx->Driver.MapTexture)
-      return;
-
-   for (u = 0; u < ctx->Const.MaxVertexTextureImageUnits; u++) {
-      if (vp->Base.TexturesUsed[u]) {
-         /* Note: _Current *should* correspond to the target indicated
-          * in TexturesUsed[u].
-          */
-         ctx->Driver.UnmapTexture(ctx, ctx->Texture.Unit[u]._Current);
-      }
-   }
-}
-
-
-/**
- * This function executes vertex programs
- */
-static GLboolean
-run_vp( GLcontext *ctx, struct tnl_pipeline_stage *stage )
-{
-   TNLcontext *tnl = TNL_CONTEXT(ctx);
-   struct vp_stage_data *store = VP_STAGE_DATA(stage);
-   struct vertex_buffer *VB = &tnl->vb;
-   struct gl_vertex_program *program = ctx->VertexProgram._Current;
-   struct gl_program_machine machine;
-   GLuint outputs[VERT_RESULT_MAX], numOutputs;
-   GLuint i, j;
-
-   if (!program)
-      return GL_TRUE;
-
-   if (program->IsNVProgram) {
-      _mesa_load_tracked_matrices(ctx);
-   }
-   else {
-      /* ARB program or vertex shader */
-      _mesa_load_state_parameters(ctx, program->Base.Parameters);
-   }
-
-   /* make list of outputs to save some time below */
-   numOutputs = 0;
-   for (i = 0; i < VERT_RESULT_MAX; i++) {
-      if (program->Base.OutputsWritten & BITFIELD64_BIT(i)) {
-         outputs[numOutputs++] = i;
-      }
-   }
-
-   map_textures(ctx, program);
-
-   for (i = 0; i < VB->Count; i++) {
-      GLuint attr;
-
-      init_machine(ctx, &machine);
-
-#if 0
-      printf("Input  %d: %f, %f, %f, %f\n", i,
-             VB->AttribPtr[0]->data[i][0],
-             VB->AttribPtr[0]->data[i][1],
-             VB->AttribPtr[0]->data[i][2],
-             VB->AttribPtr[0]->data[i][3]);
-      printf("   color: %f, %f, %f, %f\n",
-             VB->AttribPtr[3]->data[i][0],
-             VB->AttribPtr[3]->data[i][1],
-             VB->AttribPtr[3]->data[i][2],
-             VB->AttribPtr[3]->data[i][3]);
-      printf("  normal: %f, %f, %f, %f\n",
-             VB->AttribPtr[2]->data[i][0],
-             VB->AttribPtr[2]->data[i][1],
-             VB->AttribPtr[2]->data[i][2],
-             VB->AttribPtr[2]->data[i][3]);
-#endif
-
-      /* the vertex array case */
-      for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
-	 if (program->Base.InputsRead & (1 << attr)) {
-	    const GLubyte *ptr = (const GLubyte*) VB->AttribPtr[attr]->data;
-	    const GLuint size = VB->AttribPtr[attr]->size;
-	    const GLuint stride = VB->AttribPtr[attr]->stride;
-	    const GLfloat *data = (GLfloat *) (ptr + stride * i);
-#ifdef NAN_CHECK
-            check_float(data[0]);
-            check_float(data[1]);
-            check_float(data[2]);
-            check_float(data[3]);
-#endif
-	    COPY_CLEAN_4V(machine.VertAttribs[attr], size, data);
-	 }
-      }
-
-      /* execute the program */
-      _mesa_execute_program(ctx, &program->Base, &machine);
-
-      /* copy the output registers into the VB->attribs arrays */
-      for (j = 0; j < numOutputs; j++) {
-         const GLuint attr = outputs[j];
-#ifdef NAN_CHECK
-         check_float(machine.Outputs[attr][0]);
-         check_float(machine.Outputs[attr][1]);
-         check_float(machine.Outputs[attr][2]);
-         check_float(machine.Outputs[attr][3]);
-#endif
-         COPY_4V(store->results[attr].data[i], machine.Outputs[attr]);
-      }
-
-      /* FOGC is a special case.  Fragment shader expects (f,0,0,1) */
-      if (program->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_FOGC)) {
-         store->results[VERT_RESULT_FOGC].data[i][1] = 0.0;
-         store->results[VERT_RESULT_FOGC].data[i][2] = 0.0;
-         store->results[VERT_RESULT_FOGC].data[i][3] = 1.0;
-      }
-#ifdef NAN_CHECK
-      ASSERT(machine.Outputs[0][3] != 0.0F);
-#endif
-#if 0
-      printf("HPOS: %f %f %f %f\n",
-             machine.Outputs[0][0], 
-             machine.Outputs[0][1], 
-             machine.Outputs[0][2], 
-             machine.Outputs[0][3]);
-#endif
-   }
-
-   unmap_textures(ctx, program);
-
-   /* Fixup fog and point size results if needed */
-   if (program->IsNVProgram) {
-      if (ctx->Fog.Enabled &&
-          (program->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_FOGC)) == 0) {
-         for (i = 0; i < VB->Count; i++) {
-            store->results[VERT_RESULT_FOGC].data[i][0] = 1.0;
-         }
-      }
-
-      if (ctx->VertexProgram.PointSizeEnabled &&
-          (program->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_PSIZ)) == 0) {
-         for (i = 0; i < VB->Count; i++) {
-            store->results[VERT_RESULT_PSIZ].data[i][0] = ctx->Point.Size;
-         }
-      }
-   }
-
-   if (program->IsPositionInvariant) {
-      /* We need the exact same transform as in the fixed function path here
-       * to guarantee invariance, depending on compiler optimization flags
-       * results could be different otherwise.
-       */
-      VB->ClipPtr = TransformRaw( &store->results[0],
-				  &ctx->_ModelProjectMatrix,
-				  VB->AttribPtr[0] );
-
-      /* Drivers expect this to be clean to element 4...
-       */
-      switch (VB->ClipPtr->size) {
-      case 1:
-	 /* impossible */
-      case 2:
-	 _mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 2 );
-	 /* fall-through */
-      case 3:
-	 _mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 3 );
-	 /* fall-through */
-      case 4:
-	 break;
-      }
-   }
-   else {
-      /* Setup the VB pointers so that the next pipeline stages get
-       * their data from the right place (the program output arrays).
-       */
-      VB->ClipPtr = &store->results[VERT_RESULT_HPOS];
-      VB->ClipPtr->size = 4;
-      VB->ClipPtr->count = VB->Count;
-   }
-
-   VB->AttribPtr[VERT_ATTRIB_COLOR0] = &store->results[VERT_RESULT_COL0];
-   VB->AttribPtr[VERT_ATTRIB_COLOR1] = &store->results[VERT_RESULT_COL1];
-   VB->AttribPtr[VERT_ATTRIB_FOG] = &store->results[VERT_RESULT_FOGC];
-   VB->AttribPtr[_TNL_ATTRIB_POINTSIZE] = &store->results[VERT_RESULT_PSIZ];
-   VB->BackfaceColorPtr = &store->results[VERT_RESULT_BFC0];
-   VB->BackfaceSecondaryColorPtr = &store->results[VERT_RESULT_BFC1];
-
-   for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
-      VB->AttribPtr[_TNL_ATTRIB_TEX0 + i]
-         = &store->results[VERT_RESULT_TEX0 + i];
-   }
-
-   for (i = 0; i < ctx->Const.MaxVarying; i++) {
-      if (program->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_VAR0 + i)) {
-         /* Note: varying results get put into the generic attributes */
-	 VB->AttribPtr[VERT_ATTRIB_GENERIC0+i]
-            = &store->results[VERT_RESULT_VAR0 + i];
-      }
-   }
-
-
-   /* Perform NDC and cliptest operations:
-    */
-   return do_ndc_cliptest(ctx, store);
-}
-
-
-/**
- * Called the first time stage->run is called.  In effect, don't
- * allocate data until the first time the stage is run.
- */
-static GLboolean
-init_vp(GLcontext *ctx, struct tnl_pipeline_stage *stage)
-{
-   TNLcontext *tnl = TNL_CONTEXT(ctx);
-   struct vertex_buffer *VB = &(tnl->vb);
-   struct vp_stage_data *store;
-   const GLuint size = VB->Size;
-   GLuint i;
-
-   stage->privatePtr = MALLOC(sizeof(*store));
-   store = VP_STAGE_DATA(stage);
-   if (!store)
-      return GL_FALSE;
-
-   /* Allocate arrays of vertex output values */
-   for (i = 0; i < VERT_RESULT_MAX; i++) {
-      _mesa_vector4f_alloc( &store->results[i], 0, size, 32 );
-      store->results[i].size = 4;
-   }
-
-   /* a few other misc allocations */
-   _mesa_vector4f_alloc( &store->ndcCoords, 0, size, 32 );
-   store->clipmask = (GLubyte *) _mesa_align_malloc(sizeof(GLubyte)*size, 32 );
-
-   return GL_TRUE;
-}
-
-
-/**
- * Destructor for this pipeline stage.
- */
-static void
-dtr(struct tnl_pipeline_stage *stage)
-{
-   struct vp_stage_data *store = VP_STAGE_DATA(stage);
-
-   if (store) {
-      GLuint i;
-
-      /* free the vertex program result arrays */
-      for (i = 0; i < VERT_RESULT_MAX; i++)
-         _mesa_vector4f_free( &store->results[i] );
-
-      /* free misc arrays */
-      _mesa_vector4f_free( &store->ndcCoords );
-      _mesa_align_free( store->clipmask );
-
-      FREE( store );
-      stage->privatePtr = NULL;
-   }
-}
-
-
-static void
-validate_vp_stage(GLcontext *ctx, struct tnl_pipeline_stage *stage)
-{
-   if (ctx->VertexProgram._Current) {
-      _swrast_update_texture_samplers(ctx);
-   }
-}
-
-
-
-/**
- * Public description of this pipeline stage.
- */
-const struct tnl_pipeline_stage _tnl_vertex_program_stage =
-{
-   "vertex-program",
-   NULL,			/* private_data */
-   init_vp,			/* create */
-   dtr,				/* destroy */
-   validate_vp_stage, 		/* validate */
-   run_vp			/* run -- initially set to ctr */
-};
+/*

+ * Mesa 3-D graphics library

+ * Version:  7.6

+ *

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

+ * Copyright (C) 2009  VMware, Inc.  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 tnl/t_vb_program.c

+ * \brief Pipeline stage for executing vertex programs.

+ * \author Brian Paul,  Keith Whitwell

+ */

+

+

+#include "main/glheader.h"

+#include "main/colormac.h"

+#include "main/macros.h"

+#include "main/imports.h"

+#include "math/m_xform.h"

+#include "program/prog_instruction.h"

+#include "program/prog_statevars.h"

+#include "program/prog_execute.h"

+#include "swrast/s_context.h"

+

+#include "tnl/tnl.h"

+#include "tnl/t_context.h"

+#include "tnl/t_pipeline.h"

+

+

+#ifdef NAN_CHECK

+/** Check for NaNs and very large values */

+static INLINE void

+check_float(float x)

+{

+   assert(!IS_INF_OR_NAN(x));

+   assert(1.0e-15 <= x && x <= 1.0e15);

+}

+#endif

+

+

+/*!

+ * Private storage for the vertex program pipeline stage.

+ */

+struct vp_stage_data {

+   /** The results of running the vertex program go into these arrays. */

+   GLvector4f results[VERT_RESULT_MAX];

+

+   GLvector4f ndcCoords;              /**< normalized device coords */

+   GLubyte *clipmask;                 /**< clip flags */

+   GLubyte ormask, andmask;           /**< for clipping */

+

+   struct gl_program_machine machine;

+};

+

+

+#define VP_STAGE_DATA(stage) ((struct vp_stage_data *)(stage->privatePtr))

+

+

+static void

+userclip( struct gl_context *ctx,

+          GLvector4f *clip,

+          GLubyte *clipmask,

+          GLubyte *clipormask,

+          GLubyte *clipandmask )

+{

+   GLuint p;

+

+   for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {

+      if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {

+	 GLuint nr, i;

+	 const GLfloat a = ctx->Transform._ClipUserPlane[p][0];

+	 const GLfloat b = ctx->Transform._ClipUserPlane[p][1];

+	 const GLfloat c = ctx->Transform._ClipUserPlane[p][2];

+	 const GLfloat d = ctx->Transform._ClipUserPlane[p][3];

+         GLfloat *coord = (GLfloat *)clip->data;

+         GLuint stride = clip->stride;

+         GLuint count = clip->count;

+

+	 for (nr = 0, i = 0 ; i < count ; i++) {

+	    GLfloat dp = (coord[0] * a + 

+			  coord[1] * b +

+			  coord[2] * c +

+			  coord[3] * d);

+

+	    if (dp < 0) {

+	       nr++;

+	       clipmask[i] |= CLIP_USER_BIT;

+	    }

+

+	    STRIDE_F(coord, stride);

+	 }

+

+	 if (nr > 0) {

+	    *clipormask |= CLIP_USER_BIT;

+	    if (nr == count) {

+	       *clipandmask |= CLIP_USER_BIT;

+	       return;

+	    }

+	 }

+      }

+   }

+}

+

+

+static GLboolean

+do_ndc_cliptest(struct gl_context *ctx, struct vp_stage_data *store)

+{

+   TNLcontext *tnl = TNL_CONTEXT(ctx);

+   struct vertex_buffer *VB = &tnl->vb;

+   /* Cliptest and perspective divide.  Clip functions must clear

+    * the clipmask.

+    */

+   store->ormask = 0;

+   store->andmask = CLIP_FRUSTUM_BITS;

+

+   tnl_clip_prepare(ctx);

+

+   if (tnl->NeedNdcCoords) {

+      VB->NdcPtr =

+         _mesa_clip_tab[VB->ClipPtr->size]( VB->ClipPtr,

+                                            &store->ndcCoords,

+                                            store->clipmask,

+                                            &store->ormask,

+                                            &store->andmask,

+					    !ctx->Transform.DepthClamp );

+   }

+   else {

+      VB->NdcPtr = NULL;

+      _mesa_clip_np_tab[VB->ClipPtr->size]( VB->ClipPtr,

+                                            NULL,

+                                            store->clipmask,

+                                            &store->ormask,

+                                            &store->andmask,

+					    !ctx->Transform.DepthClamp );

+   }

+

+   if (store->andmask) {

+      /* All vertices are outside the frustum */

+      return GL_FALSE;

+   }

+

+   /* Test userclip planes.  This contributes to VB->ClipMask.

+    */

+   /** XXX NEW_SLANG _Enabled ??? */

+   if (ctx->Transform.ClipPlanesEnabled && (!ctx->VertexProgram._Enabled ||

+      ctx->VertexProgram.Current->IsPositionInvariant)) {

+      userclip( ctx,

+		VB->ClipPtr,

+		store->clipmask,

+		&store->ormask,

+		&store->andmask );

+

+      if (store->andmask) {

+	 return GL_FALSE;

+      }

+   }

+

+   VB->ClipAndMask = store->andmask;

+   VB->ClipOrMask = store->ormask;

+   VB->ClipMask = store->clipmask;

+

+   return GL_TRUE;

+}

+

+

+/**

+ * XXX the texture sampling code in this module is a bit of a hack.

+ * The texture sampling code is in swrast, though it doesn't have any

+ * real dependencies on the rest of swrast.  It should probably be

+ * moved into main/ someday.

+ */

+static void

+vp_fetch_texel(struct gl_context *ctx, const GLfloat texcoord[4], GLfloat lambda,

+               GLuint unit, GLfloat color[4])

+{

+   SWcontext *swrast = SWRAST_CONTEXT(ctx);

+

+   /* XXX use a float-valued TextureSample routine here!!! */

+   swrast->TextureSample[unit](ctx, ctx->Texture.Unit[unit]._Current,

+                               1, (const GLfloat (*)[4]) texcoord,

+                               &lambda,  (GLfloat (*)[4]) color);

+}

+

+

+/**

+ * Called via ctx->Driver.ProgramStringNotify() after a new vertex program

+ * string has been parsed.

+ */

+GLboolean

+_tnl_program_string(struct gl_context *ctx, GLenum target, struct gl_program *program)

+{

+   /* No-op.

+    * If we had derived anything from the program that was private to this

+    * stage we'd recompute/validate it here.

+    */

+   return GL_TRUE;

+}

+

+

+/**

+ * Initialize virtual machine state prior to executing vertex program.

+ */

+static void

+init_machine(struct gl_context *ctx, struct gl_program_machine *machine)

+{

+   /* Input registers get initialized from the current vertex attribs */

+   memcpy(machine->VertAttribs, ctx->Current.Attrib,

+          MAX_VERTEX_GENERIC_ATTRIBS * 4 * sizeof(GLfloat));

+

+   if (ctx->VertexProgram._Current->IsNVProgram) {

+      GLuint i;

+      /* Output/result regs are initialized to [0,0,0,1] */

+      for (i = 0; i < MAX_NV_VERTEX_PROGRAM_OUTPUTS; i++) {

+         ASSIGN_4V(machine->Outputs[i], 0.0F, 0.0F, 0.0F, 1.0F);

+      }

+      /* Temp regs are initialized to [0,0,0,0] */

+      for (i = 0; i < MAX_NV_VERTEX_PROGRAM_TEMPS; i++) {

+         ASSIGN_4V(machine->Temporaries[i], 0.0F, 0.0F, 0.0F, 0.0F);

+      }

+      for (i = 0; i < MAX_VERTEX_PROGRAM_ADDRESS_REGS; i++) {

+         ASSIGN_4V(machine->AddressReg[i], 0, 0, 0, 0);

+      }

+   }

+

+   machine->NumDeriv = 0;

+

+   /* init condition codes */

+   machine->CondCodes[0] = COND_EQ;

+   machine->CondCodes[1] = COND_EQ;

+   machine->CondCodes[2] = COND_EQ;

+   machine->CondCodes[3] = COND_EQ;

+

+   /* init call stack */

+   machine->StackDepth = 0;

+

+   machine->FetchTexelLod = vp_fetch_texel;

+   machine->FetchTexelDeriv = NULL; /* not used by vertex programs */

+

+   machine->Samplers = ctx->VertexProgram._Current->Base.SamplerUnits;

+}

+

+

+/**

+ * Map the texture images which the vertex program will access (if any).

+ */

+static void

+map_textures(struct gl_context *ctx, const struct gl_vertex_program *vp)

+{

+   GLuint u;

+

+   if (!ctx->Driver.MapTexture)

+      return;

+

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

+      if (vp->Base.TexturesUsed[u]) {

+         /* Note: _Current *should* correspond to the target indicated

+          * in TexturesUsed[u].

+          */

+         ctx->Driver.MapTexture(ctx, ctx->Texture.Unit[u]._Current);

+      }

+   }

+}

+

+

+/**

+ * Unmap the texture images which were used by the vertex program (if any).

+ */

+static void

+unmap_textures(struct gl_context *ctx, const struct gl_vertex_program *vp)

+{

+   GLuint u;

+

+   if (!ctx->Driver.MapTexture)

+      return;

+

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

+      if (vp->Base.TexturesUsed[u]) {

+         /* Note: _Current *should* correspond to the target indicated

+          * in TexturesUsed[u].

+          */

+         ctx->Driver.UnmapTexture(ctx, ctx->Texture.Unit[u]._Current);

+      }

+   }

+}

+

+

+/**

+ * This function executes vertex programs

+ */

+static GLboolean

+run_vp( struct gl_context *ctx, struct tnl_pipeline_stage *stage )

+{

+   TNLcontext *tnl = TNL_CONTEXT(ctx);

+   struct vp_stage_data *store = VP_STAGE_DATA(stage);

+   struct vertex_buffer *VB = &tnl->vb;

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

+   struct gl_program_machine *machine = &store->machine;

+   GLuint outputs[VERT_RESULT_MAX], numOutputs;

+   GLuint i, j;

+

+   if (!program)

+      return GL_TRUE;

+

+   if (program->IsNVProgram) {

+      _mesa_load_tracked_matrices(ctx);

+   }

+   else {

+      /* ARB program or vertex shader */

+      _mesa_load_state_parameters(ctx, program->Base.Parameters);

+   }

+

+   /* make list of outputs to save some time below */

+   numOutputs = 0;

+   for (i = 0; i < VERT_RESULT_MAX; i++) {

+      if (program->Base.OutputsWritten & BITFIELD64_BIT(i)) {

+         outputs[numOutputs++] = i;

+      }

+   }

+

+   map_textures(ctx, program);

+

+   for (i = 0; i < VB->Count; i++) {

+      GLuint attr;

+

+      init_machine(ctx, machine);

+

+#if 0

+      printf("Input  %d: %f, %f, %f, %f\n", i,

+             VB->AttribPtr[0]->data[i][0],

+             VB->AttribPtr[0]->data[i][1],

+             VB->AttribPtr[0]->data[i][2],

+             VB->AttribPtr[0]->data[i][3]);

+      printf("   color: %f, %f, %f, %f\n",

+             VB->AttribPtr[3]->data[i][0],

+             VB->AttribPtr[3]->data[i][1],

+             VB->AttribPtr[3]->data[i][2],

+             VB->AttribPtr[3]->data[i][3]);

+      printf("  normal: %f, %f, %f, %f\n",

+             VB->AttribPtr[2]->data[i][0],

+             VB->AttribPtr[2]->data[i][1],

+             VB->AttribPtr[2]->data[i][2],

+             VB->AttribPtr[2]->data[i][3]);

+#endif

+

+      /* the vertex array case */

+      for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {

+	 if (program->Base.InputsRead & (1 << attr)) {

+	    const GLubyte *ptr = (const GLubyte*) VB->AttribPtr[attr]->data;

+	    const GLuint size = VB->AttribPtr[attr]->size;

+	    const GLuint stride = VB->AttribPtr[attr]->stride;

+	    const GLfloat *data = (GLfloat *) (ptr + stride * i);

+#ifdef NAN_CHECK

+            check_float(data[0]);

+            check_float(data[1]);

+            check_float(data[2]);

+            check_float(data[3]);

+#endif

+	    COPY_CLEAN_4V(machine->VertAttribs[attr], size, data);

+	 }

+      }

+

+      /* execute the program */

+      _mesa_execute_program(ctx, &program->Base, machine);

+

+      /* copy the output registers into the VB->attribs arrays */

+      for (j = 0; j < numOutputs; j++) {

+         const GLuint attr = outputs[j];

+#ifdef NAN_CHECK

+         check_float(machine->Outputs[attr][0]);

+         check_float(machine->Outputs[attr][1]);

+         check_float(machine->Outputs[attr][2]);

+         check_float(machine->Outputs[attr][3]);

+#endif

+         COPY_4V(store->results[attr].data[i], machine->Outputs[attr]);

+      }

+

+      /* FOGC is a special case.  Fragment shader expects (f,0,0,1) */

+      if (program->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_FOGC)) {

+         store->results[VERT_RESULT_FOGC].data[i][1] = 0.0;

+         store->results[VERT_RESULT_FOGC].data[i][2] = 0.0;

+         store->results[VERT_RESULT_FOGC].data[i][3] = 1.0;

+      }

+#ifdef NAN_CHECK

+      ASSERT(machine->Outputs[0][3] != 0.0F);

+#endif

+#if 0

+      printf("HPOS: %f %f %f %f\n",

+             machine->Outputs[0][0], 

+             machine->Outputs[0][1], 

+             machine->Outputs[0][2], 

+             machine->Outputs[0][3]);

+#endif

+   }

+

+   unmap_textures(ctx, program);

+

+   /* Fixup fog and point size results if needed */

+   if (program->IsNVProgram) {

+      if (ctx->Fog.Enabled &&

+          (program->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_FOGC)) == 0) {

+         for (i = 0; i < VB->Count; i++) {

+            store->results[VERT_RESULT_FOGC].data[i][0] = 1.0;

+         }

+      }

+

+      if (ctx->VertexProgram.PointSizeEnabled &&

+          (program->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_PSIZ)) == 0) {

+         for (i = 0; i < VB->Count; i++) {

+            store->results[VERT_RESULT_PSIZ].data[i][0] = ctx->Point.Size;

+         }

+      }

+   }

+

+   if (program->IsPositionInvariant) {

+      /* We need the exact same transform as in the fixed function path here

+       * to guarantee invariance, depending on compiler optimization flags

+       * results could be different otherwise.

+       */

+      VB->ClipPtr = TransformRaw( &store->results[0],

+				  &ctx->_ModelProjectMatrix,

+				  VB->AttribPtr[0] );

+

+      /* Drivers expect this to be clean to element 4...

+       */

+      switch (VB->ClipPtr->size) {

+      case 1:

+	 /* impossible */

+      case 2:

+	 _mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 2 );

+	 /* fall-through */

+      case 3:

+	 _mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 3 );

+	 /* fall-through */

+      case 4:

+	 break;

+      }

+   }

+   else {

+      /* Setup the VB pointers so that the next pipeline stages get

+       * their data from the right place (the program output arrays).

+       */

+      VB->ClipPtr = &store->results[VERT_RESULT_HPOS];

+      VB->ClipPtr->size = 4;

+      VB->ClipPtr->count = VB->Count;

+   }

+

+   VB->AttribPtr[VERT_ATTRIB_COLOR0] = &store->results[VERT_RESULT_COL0];

+   VB->AttribPtr[VERT_ATTRIB_COLOR1] = &store->results[VERT_RESULT_COL1];

+   VB->AttribPtr[VERT_ATTRIB_FOG] = &store->results[VERT_RESULT_FOGC];

+   VB->AttribPtr[_TNL_ATTRIB_POINTSIZE] = &store->results[VERT_RESULT_PSIZ];

+   VB->BackfaceColorPtr = &store->results[VERT_RESULT_BFC0];

+   VB->BackfaceSecondaryColorPtr = &store->results[VERT_RESULT_BFC1];

+

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

+      VB->AttribPtr[_TNL_ATTRIB_TEX0 + i]

+         = &store->results[VERT_RESULT_TEX0 + i];

+   }

+

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

+      if (program->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_VAR0 + i)) {

+         /* Note: varying results get put into the generic attributes */

+	 VB->AttribPtr[VERT_ATTRIB_GENERIC0+i]

+            = &store->results[VERT_RESULT_VAR0 + i];

+      }

+   }

+

+

+   /* Perform NDC and cliptest operations:

+    */

+   return do_ndc_cliptest(ctx, store);

+}

+

+

+/**

+ * Called the first time stage->run is called.  In effect, don't

+ * allocate data until the first time the stage is run.

+ */

+static GLboolean

+init_vp(struct gl_context *ctx, struct tnl_pipeline_stage *stage)

+{

+   TNLcontext *tnl = TNL_CONTEXT(ctx);

+   struct vertex_buffer *VB = &(tnl->vb);

+   struct vp_stage_data *store;

+   const GLuint size = VB->Size;

+   GLuint i;

+

+   stage->privatePtr = CALLOC(sizeof(*store));

+   store = VP_STAGE_DATA(stage);

+   if (!store)

+      return GL_FALSE;

+

+   /* Allocate arrays of vertex output values */

+   for (i = 0; i < VERT_RESULT_MAX; i++) {

+      _mesa_vector4f_alloc( &store->results[i], 0, size, 32 );

+      store->results[i].size = 4;

+   }

+

+   /* a few other misc allocations */

+   _mesa_vector4f_alloc( &store->ndcCoords, 0, size, 32 );

+   store->clipmask = (GLubyte *) _mesa_align_malloc(sizeof(GLubyte)*size, 32 );

+

+   return GL_TRUE;

+}

+

+

+/**

+ * Destructor for this pipeline stage.

+ */

+static void

+dtr(struct tnl_pipeline_stage *stage)

+{

+   struct vp_stage_data *store = VP_STAGE_DATA(stage);

+

+   if (store) {

+      GLuint i;

+

+      /* free the vertex program result arrays */

+      for (i = 0; i < VERT_RESULT_MAX; i++)

+         _mesa_vector4f_free( &store->results[i] );

+

+      /* free misc arrays */

+      _mesa_vector4f_free( &store->ndcCoords );

+      _mesa_align_free( store->clipmask );

+

+      FREE( store );

+      stage->privatePtr = NULL;

+   }

+}

+

+

+static void

+validate_vp_stage(struct gl_context *ctx, struct tnl_pipeline_stage *stage)

+{

+   if (ctx->VertexProgram._Current) {

+      _swrast_update_texture_samplers(ctx);

+   }

+}

+

+

+

+/**

+ * Public description of this pipeline stage.

+ */

+const struct tnl_pipeline_stage _tnl_vertex_program_stage =

+{

+   "vertex-program",

+   NULL,			/* private_data */

+   init_vp,			/* create */

+   dtr,				/* destroy */

+   validate_vp_stage, 		/* validate */

+   run_vp			/* run -- initially set to ctr */

+};