svn merge ^/branches/released .

1 files changed, 276 insertions, 276 deletions

diff --git a/mesalib/src/mesa/tnl/t_vb_fog.c b/mesalib/src/mesa/tnl/t_vb_fog.c
index 9faae24ec..3e5c99735 100644
--- a/mesalib/src/mesa/tnl/t_vb_fog.c
+++ b/mesalib/src/mesa/tnl/t_vb_fog.c
@@ -1,276 +1,276 @@
-/*
- * Mesa 3-D graphics library
- * Version:  6.5
- *
- * Copyright (C) 1999-2006  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>
- */
-
-
-#include "main/glheader.h"
-#include "main/colormac.h"
-#include "main/macros.h"
-#include "main/imports.h"
-#include "main/mtypes.h"
-
-#include "math/m_xform.h"
-
-#include "t_context.h"
-#include "t_pipeline.h"
-
-
-struct fog_stage_data {
-   GLvector4f fogcoord;		/* has actual storage allocated */
-};
-
-#define FOG_STAGE_DATA(stage) ((struct fog_stage_data *)stage->privatePtr)
-
-#define FOG_EXP_TABLE_SIZE 256
-#define FOG_MAX (10.0)
-#define EXP_FOG_MAX .0006595
-#define FOG_INCR (FOG_MAX/FOG_EXP_TABLE_SIZE)
-static GLfloat exp_table[FOG_EXP_TABLE_SIZE];
-static GLfloat inited = 0;
-
-#if 1
-#define NEG_EXP( result, narg )						\
-do {									\
-   GLfloat f = (GLfloat) (narg * (1.0/FOG_INCR));			\
-   GLint k = (GLint) f;							\
-   if (k > FOG_EXP_TABLE_SIZE-2) 					\
-      result = (GLfloat) EXP_FOG_MAX;					\
-   else									\
-      result = exp_table[k] + (f-k)*(exp_table[k+1]-exp_table[k]);	\
-} while (0)
-#else
-#define NEG_EXP( result, narg )					\
-do {								\
-   result = exp(-narg);						\
-} while (0)
-#endif
-
-
-/**
- * Initialize the exp_table[] lookup table for approximating exp().
- */
-static void
-init_static_data( void )
-{
-   GLfloat f = 0.0F;
-   GLint i = 0;
-   for ( ; i < FOG_EXP_TABLE_SIZE ; i++, f += FOG_INCR) {
-      exp_table[i] = EXPF(-f);
-   }
-   inited = 1;
-}
-
-
-/**
- * Compute per-vertex fog blend factors from fog coordinates by
- * evaluating the GL_LINEAR, GL_EXP or GL_EXP2 fog function.
- * Fog coordinates are distances from the eye (typically between the
- * near and far clip plane distances).
- * Note that fogcoords may be negative, if eye z is source absolute
- * value must be taken earlier.
- * Fog blend factors are in the range [0,1].
- */
-static void
-compute_fog_blend_factors(GLcontext *ctx, GLvector4f *out, const GLvector4f *in)
-{
-   GLfloat end  = ctx->Fog.End;
-   GLfloat *v = in->start;
-   GLuint stride = in->stride;
-   GLuint n = in->count;
-   GLfloat (*data)[4] = out->data;
-   GLfloat d;
-   GLuint i;
-
-   out->count = in->count;
-
-   switch (ctx->Fog.Mode) {
-   case GL_LINEAR:
-      if (ctx->Fog.Start == ctx->Fog.End)
-         d = 1.0F;
-      else
-         d = 1.0F / (ctx->Fog.End - ctx->Fog.Start);
-      for ( i = 0 ; i < n ; i++, STRIDE_F(v, stride)) {
-         const GLfloat z = *v;
-         GLfloat f = (end - z) * d;
-	 data[i][0] = CLAMP(f, 0.0F, 1.0F);
-      }
-      break;
-   case GL_EXP:
-      d = ctx->Fog.Density;
-      for ( i = 0 ; i < n ; i++, STRIDE_F(v,stride)) {
-         const GLfloat z = *v;
-         NEG_EXP( data[i][0], d * z );
-      }
-      break;
-   case GL_EXP2:
-      d = ctx->Fog.Density*ctx->Fog.Density;
-      for ( i = 0 ; i < n ; i++, STRIDE_F(v, stride)) {
-         const GLfloat z = *v;
-         NEG_EXP( data[i][0], d * z * z );
-      }
-      break;
-   default:
-      _mesa_problem(ctx, "Bad fog mode in make_fog_coord");
-      return;
-   }
-}
-
-
-static GLboolean
-run_fog_stage(GLcontext *ctx, struct tnl_pipeline_stage *stage)
-{
-   TNLcontext *tnl = TNL_CONTEXT(ctx);
-   struct vertex_buffer *VB = &tnl->vb;
-   struct fog_stage_data *store = FOG_STAGE_DATA(stage);
-   GLvector4f *input;
-
-
-   if (!ctx->Fog.Enabled)
-      return GL_TRUE;
-
-   if (ctx->Fog.FogCoordinateSource == GL_FRAGMENT_DEPTH_EXT && !ctx->VertexProgram._Current) {
-      GLuint i;
-      GLfloat *coord;
-      /* Fog is computed from vertex or fragment Z values */
-      /* source = VB->AttribPtr[_TNL_ATTRIB_POS] or VB->EyePtr coords */
-      /* dest = VB->AttribPtr[_TNL_ATTRIB_FOG] = fog stage private storage */
-      VB->AttribPtr[_TNL_ATTRIB_FOG] = &store->fogcoord;
-
-      if (!ctx->_NeedEyeCoords) {
-         /* compute fog coords from object coords */
-	 const GLfloat *m = ctx->ModelviewMatrixStack.Top->m;
-	 GLfloat plane[4];
-
-	 /* Use this to store calculated eye z values:
-	  */
-	 input = &store->fogcoord;
-
-	 plane[0] = m[2];
-	 plane[1] = m[6];
-	 plane[2] = m[10];
-	 plane[3] = m[14];
-	 /* Full eye coords weren't required, just calculate the
-	  * eye Z values.
-	  */
-	 _mesa_dotprod_tab[VB->AttribPtr[_TNL_ATTRIB_POS]->size]
-	    ( (GLfloat *) input->data,
-	      4 * sizeof(GLfloat),
-	      VB->AttribPtr[_TNL_ATTRIB_POS], plane );
-
-	 input->count = VB->AttribPtr[_TNL_ATTRIB_POS]->count;
-
-	 /* make sure coords are really positive
-	    NOTE should avoid going through array twice */
-	 coord = input->start;
-	 for (i = 0; i < input->count; i++) {
-	    *coord = FABSF(*coord);
-	    STRIDE_F(coord, input->stride);
-	 }
-      }
-      else {
-         /* fog coordinates = eye Z coordinates - need to copy for ABS */
-	 input = &store->fogcoord;
-
-	 if (VB->EyePtr->size < 2)
-	    _mesa_vector4f_clean_elem( VB->EyePtr, VB->Count, 2 );
-
-	 input->stride = 4 * sizeof(GLfloat);
-	 input->count = VB->EyePtr->count;
-	 coord = VB->EyePtr->start;
-	 for (i = 0 ; i < VB->EyePtr->count; i++) {
-	    input->data[i][0] = FABSF(coord[2]);
-	    STRIDE_F(coord, VB->EyePtr->stride);
-	 }
-      }
-   }
-   else {
-      /* use glFogCoord() coordinates */
-      input = VB->AttribPtr[_TNL_ATTRIB_FOG];  /* source data */
-
-      /* input->count may be one if glFogCoord was only called once
-       * before glBegin.  But we need to compute fog for all vertices.
-       */
-      input->count = VB->AttribPtr[_TNL_ATTRIB_POS]->count;
-
-      VB->AttribPtr[_TNL_ATTRIB_FOG] = &store->fogcoord;  /* dest data */
-   }
-
-   if (tnl->_DoVertexFog) {
-      /* compute blend factors from fog coordinates */
-      compute_fog_blend_factors( ctx, VB->AttribPtr[_TNL_ATTRIB_FOG], input );
-   }
-   else {
-      /* results = incoming fog coords (compute fog per-fragment later) */
-      VB->AttribPtr[_TNL_ATTRIB_FOG] = input;
-   }
-
-   return GL_TRUE;
-}
-
-
-
-/* Called the first time stage->run() is invoked.
- */
-static GLboolean
-alloc_fog_data(GLcontext *ctx, struct tnl_pipeline_stage *stage)
-{
-   TNLcontext *tnl = TNL_CONTEXT(ctx);
-   struct fog_stage_data *store;
-   stage->privatePtr = MALLOC(sizeof(*store));
-   store = FOG_STAGE_DATA(stage);
-   if (!store)
-      return GL_FALSE;
-
-   _mesa_vector4f_alloc( &store->fogcoord, 0, tnl->vb.Size, 32 );
-
-   if (!inited)
-      init_static_data();
-
-   return GL_TRUE;
-}
-
-
-static void
-free_fog_data(struct tnl_pipeline_stage *stage)
-{
-   struct fog_stage_data *store = FOG_STAGE_DATA(stage);
-   if (store) {
-      _mesa_vector4f_free( &store->fogcoord );
-      FREE( store );
-      stage->privatePtr = NULL;
-   }
-}
-
-
-const struct tnl_pipeline_stage _tnl_fog_coordinate_stage =
-{
-   "build fog coordinates",	/* name */
-   NULL,			/* private_data */
-   alloc_fog_data,		/* dtr */
-   free_fog_data,		/* dtr */
-   NULL,		/* check */
-   run_fog_stage		/* run -- initially set to init. */
-};
+/*

+ * Mesa 3-D graphics library

+ * Version:  6.5

+ *

+ * Copyright (C) 1999-2006  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>

+ */

+

+

+#include "main/glheader.h"

+#include "main/colormac.h"

+#include "main/macros.h"

+#include "main/imports.h"

+#include "main/mtypes.h"

+

+#include "math/m_xform.h"

+

+#include "t_context.h"

+#include "t_pipeline.h"

+

+

+struct fog_stage_data {

+   GLvector4f fogcoord;		/* has actual storage allocated */

+};

+

+#define FOG_STAGE_DATA(stage) ((struct fog_stage_data *)stage->privatePtr)

+

+#define FOG_EXP_TABLE_SIZE 256

+#define FOG_MAX (10.0)

+#define EXP_FOG_MAX .0006595

+#define FOG_INCR (FOG_MAX/FOG_EXP_TABLE_SIZE)

+static GLfloat exp_table[FOG_EXP_TABLE_SIZE];

+static GLfloat inited = 0;

+

+#if 1

+#define NEG_EXP( result, narg )						\

+do {									\

+   GLfloat f = (GLfloat) (narg * (1.0/FOG_INCR));			\

+   GLint k = (GLint) f;							\

+   if (k > FOG_EXP_TABLE_SIZE-2) 					\

+      result = (GLfloat) EXP_FOG_MAX;					\

+   else									\

+      result = exp_table[k] + (f-k)*(exp_table[k+1]-exp_table[k]);	\

+} while (0)

+#else

+#define NEG_EXP( result, narg )					\

+do {								\

+   result = exp(-narg);						\

+} while (0)

+#endif

+

+

+/**

+ * Initialize the exp_table[] lookup table for approximating exp().

+ */

+static void

+init_static_data( void )

+{

+   GLfloat f = 0.0F;

+   GLint i = 0;

+   for ( ; i < FOG_EXP_TABLE_SIZE ; i++, f += FOG_INCR) {

+      exp_table[i] = EXPF(-f);

+   }

+   inited = 1;

+}

+

+

+/**

+ * Compute per-vertex fog blend factors from fog coordinates by

+ * evaluating the GL_LINEAR, GL_EXP or GL_EXP2 fog function.

+ * Fog coordinates are distances from the eye (typically between the

+ * near and far clip plane distances).

+ * Note that fogcoords may be negative, if eye z is source absolute

+ * value must be taken earlier.

+ * Fog blend factors are in the range [0,1].

+ */

+static void

+compute_fog_blend_factors(struct gl_context *ctx, GLvector4f *out, const GLvector4f *in)

+{

+   GLfloat end  = ctx->Fog.End;

+   GLfloat *v = in->start;

+   GLuint stride = in->stride;

+   GLuint n = in->count;

+   GLfloat (*data)[4] = out->data;

+   GLfloat d;

+   GLuint i;

+

+   out->count = in->count;

+

+   switch (ctx->Fog.Mode) {

+   case GL_LINEAR:

+      if (ctx->Fog.Start == ctx->Fog.End)

+         d = 1.0F;

+      else

+         d = 1.0F / (ctx->Fog.End - ctx->Fog.Start);

+      for ( i = 0 ; i < n ; i++, STRIDE_F(v, stride)) {

+         const GLfloat z = *v;

+         GLfloat f = (end - z) * d;

+	 data[i][0] = CLAMP(f, 0.0F, 1.0F);

+      }

+      break;

+   case GL_EXP:

+      d = ctx->Fog.Density;

+      for ( i = 0 ; i < n ; i++, STRIDE_F(v,stride)) {

+         const GLfloat z = *v;

+         NEG_EXP( data[i][0], d * z );

+      }

+      break;

+   case GL_EXP2:

+      d = ctx->Fog.Density*ctx->Fog.Density;

+      for ( i = 0 ; i < n ; i++, STRIDE_F(v, stride)) {

+         const GLfloat z = *v;

+         NEG_EXP( data[i][0], d * z * z );

+      }

+      break;

+   default:

+      _mesa_problem(ctx, "Bad fog mode in make_fog_coord");

+      return;

+   }

+}

+

+

+static GLboolean

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

+{

+   TNLcontext *tnl = TNL_CONTEXT(ctx);

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

+   struct fog_stage_data *store = FOG_STAGE_DATA(stage);

+   GLvector4f *input;

+

+

+   if (!ctx->Fog.Enabled)

+      return GL_TRUE;

+

+   if (ctx->Fog.FogCoordinateSource == GL_FRAGMENT_DEPTH_EXT && !ctx->VertexProgram._Current) {

+      GLuint i;

+      GLfloat *coord;

+      /* Fog is computed from vertex or fragment Z values */

+      /* source = VB->AttribPtr[_TNL_ATTRIB_POS] or VB->EyePtr coords */

+      /* dest = VB->AttribPtr[_TNL_ATTRIB_FOG] = fog stage private storage */

+      VB->AttribPtr[_TNL_ATTRIB_FOG] = &store->fogcoord;

+

+      if (!ctx->_NeedEyeCoords) {

+         /* compute fog coords from object coords */

+	 const GLfloat *m = ctx->ModelviewMatrixStack.Top->m;

+	 GLfloat plane[4];

+

+	 /* Use this to store calculated eye z values:

+	  */

+	 input = &store->fogcoord;

+

+	 plane[0] = m[2];

+	 plane[1] = m[6];

+	 plane[2] = m[10];

+	 plane[3] = m[14];

+	 /* Full eye coords weren't required, just calculate the

+	  * eye Z values.

+	  */

+	 _mesa_dotprod_tab[VB->AttribPtr[_TNL_ATTRIB_POS]->size]

+	    ( (GLfloat *) input->data,

+	      4 * sizeof(GLfloat),

+	      VB->AttribPtr[_TNL_ATTRIB_POS], plane );

+

+	 input->count = VB->AttribPtr[_TNL_ATTRIB_POS]->count;

+

+	 /* make sure coords are really positive

+	    NOTE should avoid going through array twice */

+	 coord = input->start;

+	 for (i = 0; i < input->count; i++) {

+	    *coord = FABSF(*coord);

+	    STRIDE_F(coord, input->stride);

+	 }

+      }

+      else {

+         /* fog coordinates = eye Z coordinates - need to copy for ABS */

+	 input = &store->fogcoord;

+

+	 if (VB->EyePtr->size < 2)

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

+

+	 input->stride = 4 * sizeof(GLfloat);

+	 input->count = VB->EyePtr->count;

+	 coord = VB->EyePtr->start;

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

+	    input->data[i][0] = FABSF(coord[2]);

+	    STRIDE_F(coord, VB->EyePtr->stride);

+	 }

+      }

+   }

+   else {

+      /* use glFogCoord() coordinates */

+      input = VB->AttribPtr[_TNL_ATTRIB_FOG];  /* source data */

+

+      /* input->count may be one if glFogCoord was only called once

+       * before glBegin.  But we need to compute fog for all vertices.

+       */

+      input->count = VB->AttribPtr[_TNL_ATTRIB_POS]->count;

+

+      VB->AttribPtr[_TNL_ATTRIB_FOG] = &store->fogcoord;  /* dest data */

+   }

+

+   if (tnl->_DoVertexFog) {

+      /* compute blend factors from fog coordinates */

+      compute_fog_blend_factors( ctx, VB->AttribPtr[_TNL_ATTRIB_FOG], input );

+   }

+   else {

+      /* results = incoming fog coords (compute fog per-fragment later) */

+      VB->AttribPtr[_TNL_ATTRIB_FOG] = input;

+   }

+

+   return GL_TRUE;

+}

+

+

+

+/* Called the first time stage->run() is invoked.

+ */

+static GLboolean

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

+{

+   TNLcontext *tnl = TNL_CONTEXT(ctx);

+   struct fog_stage_data *store;

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

+   store = FOG_STAGE_DATA(stage);

+   if (!store)

+      return GL_FALSE;

+

+   _mesa_vector4f_alloc( &store->fogcoord, 0, tnl->vb.Size, 32 );

+

+   if (!inited)

+      init_static_data();

+

+   return GL_TRUE;

+}

+

+

+static void

+free_fog_data(struct tnl_pipeline_stage *stage)

+{

+   struct fog_stage_data *store = FOG_STAGE_DATA(stage);

+   if (store) {

+      _mesa_vector4f_free( &store->fogcoord );

+      FREE( store );

+      stage->privatePtr = NULL;

+   }

+}

+

+

+const struct tnl_pipeline_stage _tnl_fog_coordinate_stage =

+{

+   "build fog coordinates",	/* name */

+   NULL,			/* private_data */

+   alloc_fog_data,		/* dtr */

+   free_fog_data,		/* dtr */

+   NULL,		/* check */

+   run_fog_stage		/* run -- initially set to init. */

+};