X-Git-Url: https://git.libre-soc.org/?p=mesa.git;a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Farbprogram.c;h=8150b5f4ec1ddedd2b5468c4f5c3b536e1e37d6d;hp=f6d16b5547f7b9d72100d422f598226a59c4c1b8;hb=1a1db1746db82efc7f0643508886dfc78a15eb71;hpb=964e5325bdcca702cfb2f210e0b89809e42847ef

diff --git a/src/mesa/main/arbprogram.c b/src/mesa/main/arbprogram.c
index f6d16b5547f..8150b5f4ec1 100644
--- a/src/mesa/main/arbprogram.c
+++ b/src/mesa/main/arbprogram.c
@@ -1,8 +1,8 @@
 /*
  * Mesa 3-D graphics library
- * Version:  5.1
+ * Version:  7.0
  *
- * Copyright (C) 1999-2003  Brian Paul   All Rights Reserved.
+ * Copyright (C) 1999-2007  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"),
@@ -29,203 +29,328 @@
  */
 
 
-#include "glheader.h"
-#include "arbprogram.h"
-#include "arbfragparse.h"
-#include "arbvertparse.h"
-#include "context.h"
-#include "imports.h"
-#include "macros.h"
-#include "mtypes.h"
-#include "nvprogram.h"
-#include "nvfragparse.h"
-#include "nvfragprog.h"
-#include "nvvertparse.h"
-#include "nvvertprog.h"
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/hash.h"
+#include "main/imports.h"
+#include "main/macros.h"
+#include "main/mtypes.h"
+#include "main/arbprogram.h"
+#include "program/arbprogparse.h"
+#include "program/program.h"
 
 
+/**
+ * Bind a program (make it current)
+ * \note Called from the GL API dispatcher by both glBindProgramNV
+ * and glBindProgramARB.
+ */
 void GLAPIENTRY
-_mesa_EnableVertexAttribArrayARB(GLuint index)
+_mesa_BindProgramARB(GLenum target, GLuint id)
 {
+   struct gl_program *curProg, *newProg;
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
-   if (index >= ctx->Const.MaxVertexProgramAttribs) {
-      _mesa_error(ctx, GL_INVALID_VALUE,
-                  "glEnableVertexAttribArrayARB(index)");
+   /* Error-check target and get curProg */
+   if (target == GL_VERTEX_PROGRAM_ARB && ctx->Extensions.ARB_vertex_program) {
+      curProg = &ctx->VertexProgram.Current->Base;
+   }
+   else if (target == GL_FRAGMENT_PROGRAM_ARB
+            && ctx->Extensions.ARB_fragment_program) {
+      curProg = &ctx->FragmentProgram.Current->Base;
+   }
+   else {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBindProgramARB(target)");
       return;
    }
 
-   FLUSH_VERTICES(ctx, _NEW_ARRAY);
-   ctx->Array.VertexAttrib[index].Enabled = GL_TRUE;
-   ctx->Array._Enabled |= _NEW_ARRAY_ATTRIB(index);
-   ctx->Array.NewState |= _NEW_ARRAY_ATTRIB(index);
-}
-
+   /*
+    * Get pointer to new program to bind.
+    * NOTE: binding to a non-existant program is not an error.
+    * That's supposed to be caught in glBegin.
+    */
+   if (id == 0) {
+      /* Bind a default program */
+      newProg = NULL;
+      if (target == GL_VERTEX_PROGRAM_ARB)
+         newProg = &ctx->Shared->DefaultVertexProgram->Base;
+      else
+         newProg = &ctx->Shared->DefaultFragmentProgram->Base;
+   }
+   else {
+      /* Bind a user program */
+      newProg = _mesa_lookup_program(ctx, id);
+      if (!newProg || newProg == &_mesa_DummyProgram) {
+         /* allocate a new program now */
+         newProg = ctx->Driver.NewProgram(ctx, target, id);
+         if (!newProg) {
+            _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindProgramARB");
+            return;
+         }
+         _mesa_HashInsert(ctx->Shared->Programs, id, newProg);
+      }
+      else if (newProg->Target != target) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glBindProgramARB(target mismatch)");
+         return;
+      }
+   }
 
-void GLAPIENTRY
-_mesa_DisableVertexAttribArrayARB(GLuint index)
-{
-   GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
+   /** All error checking is complete now **/
 
-   if (index >= ctx->Const.MaxVertexProgramAttribs) {
-      _mesa_error(ctx, GL_INVALID_VALUE,
-                  "glEnableVertexAttribArrayARB(index)");
+   if (curProg->Id == id) {
+      /* binding same program - no change */
       return;
    }
 
-   FLUSH_VERTICES(ctx, _NEW_ARRAY);
-   ctx->Array.VertexAttrib[index].Enabled = GL_FALSE;
-   ctx->Array._Enabled &= ~_NEW_ARRAY_ATTRIB(index);
-   ctx->Array.NewState |= _NEW_ARRAY_ATTRIB(index);
+   /* signal new program (and its new constants) */
+   FLUSH_VERTICES(ctx, _NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS);
+
+   /* bind newProg */
+   if (target == GL_VERTEX_PROGRAM_ARB) {
+      _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
+                               gl_vertex_program(newProg));
+   }
+   else if (target == GL_FRAGMENT_PROGRAM_ARB) {
+      _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,
+                               gl_fragment_program(newProg));
+   }
+
+   /* Never null pointers */
+   ASSERT(ctx->VertexProgram.Current);
+   ASSERT(ctx->FragmentProgram.Current);
+
+   if (ctx->Driver.BindProgram)
+      ctx->Driver.BindProgram(ctx, target, newProg);
 }
 
 
-void GLAPIENTRY
-_mesa_GetVertexAttribdvARB(GLuint index, GLenum pname, GLdouble *params)
+/**
+ * Delete a list of programs.
+ * \note Not compiled into display lists.
+ * \note Called by both glDeleteProgramsNV and glDeleteProgramsARB.
+ */
+void GLAPIENTRY 
+_mesa_DeleteProgramsARB(GLsizei n, const GLuint *ids)
 {
-   GLfloat fparams[4];
+   GLint i;
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
-   _mesa_GetVertexAttribfvARB(index, pname, fparams);
-   if (ctx->ErrorValue == GL_NO_ERROR) {
-      if (pname == GL_CURRENT_VERTEX_ATTRIB_ARB) {
-         COPY_4V(params, fparams);
-      }
-      else {
-         params[0] = fparams[0];
+   if (n < 0) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glDeleteProgramsNV" );
+      return;
+   }
+
+   for (i = 0; i < n; i++) {
+      if (ids[i] != 0) {
+         struct gl_program *prog = _mesa_lookup_program(ctx, ids[i]);
+         if (prog == &_mesa_DummyProgram) {
+            _mesa_HashRemove(ctx->Shared->Programs, ids[i]);
+         }
+         else if (prog) {
+            /* Unbind program if necessary */
+            switch (prog->Target) {
+            case GL_VERTEX_PROGRAM_ARB:
+               if (ctx->VertexProgram.Current &&
+                   ctx->VertexProgram.Current->Base.Id == ids[i]) {
+                  /* unbind this currently bound program */
+                  _mesa_BindProgramARB(prog->Target, 0);
+               }
+               break;
+            case GL_FRAGMENT_PROGRAM_ARB:
+               if (ctx->FragmentProgram.Current &&
+                   ctx->FragmentProgram.Current->Base.Id == ids[i]) {
+                  /* unbind this currently bound program */
+                  _mesa_BindProgramARB(prog->Target, 0);
+               }
+               break;
+            default:
+               _mesa_problem(ctx, "bad target in glDeleteProgramsNV");
+               return;
+            }
+            /* The ID is immediately available for re-use now */
+            _mesa_HashRemove(ctx->Shared->Programs, ids[i]);
+            _mesa_reference_program(ctx, &prog, NULL);
+         }
       }
    }
 }
 
 
+/**
+ * Generate a list of new program identifiers.
+ * \note Not compiled into display lists.
+ * \note Called by both glGenProgramsNV and glGenProgramsARB.
+ */
 void GLAPIENTRY
-_mesa_GetVertexAttribfvARB(GLuint index, GLenum pname, GLfloat *params)
+_mesa_GenProgramsARB(GLsizei n, GLuint *ids)
 {
+   GLuint first;
+   GLuint i;
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
-   if (index == 0 || index >= VERT_ATTRIB_MAX) {
-      _mesa_error(ctx, GL_INVALID_VALUE, "glGetVertexAttribfvARB(index)");
+   if (n < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glGenPrograms");
       return;
    }
 
-   switch (pname) {
-      case GL_VERTEX_ATTRIB_ARRAY_ENABLED_ARB:
-         params[0] = (GLfloat) ctx->Array.VertexAttrib[index].Enabled;
-         break;
-      case GL_VERTEX_ATTRIB_ARRAY_SIZE_ARB:
-         params[0] = (GLfloat) ctx->Array.VertexAttrib[index].Size;
-         break;
-      case GL_VERTEX_ATTRIB_ARRAY_STRIDE_ARB:
-         params[0] = (GLfloat) ctx->Array.VertexAttrib[index].Stride;
-         break;
-      case GL_VERTEX_ATTRIB_ARRAY_TYPE_ARB:
-         params[0] = (GLfloat) ctx->Array.VertexAttrib[index].Type;
-         break;
-      case GL_VERTEX_ATTRIB_ARRAY_NORMALIZED_ARB:
-         params[0] = ctx->Array.VertexAttrib[index].Normalized;
-         break;
-      case GL_CURRENT_VERTEX_ATTRIB_ARB:
-	 FLUSH_CURRENT(ctx, 0);
-         COPY_4V(params, ctx->Current.Attrib[index]);
-         break;
-      case GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING_ARB:
-         if (!ctx->Extensions.ARB_vertex_buffer_object) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glGetVertexAttribfvARB(pname)");
-            return;
-         }
-         params[0] = (GLfloat) ctx->Array.VertexAttrib[index].BufferObj->Name;
-      default:
-         _mesa_error(ctx, GL_INVALID_ENUM, "glGetVertexAttribfvARB(pname)");
-         return;
+   if (!ids)
+      return;
+
+   first = _mesa_HashFindFreeKeyBlock(ctx->Shared->Programs, n);
+
+   /* Insert pointer to dummy program as placeholder */
+   for (i = 0; i < (GLuint) n; i++) {
+      _mesa_HashInsert(ctx->Shared->Programs, first + i, &_mesa_DummyProgram);
+   }
+
+   /* Return the program names */
+   for (i = 0; i < (GLuint) n; i++) {
+      ids[i] = first + i;
    }
 }
 
 
-void GLAPIENTRY
-_mesa_GetVertexAttribivARB(GLuint index, GLenum pname, GLint *params)
+/**
+ * Determine if id names a vertex or fragment program.
+ * \note Not compiled into display lists.
+ * \note Called from both glIsProgramNV and glIsProgramARB.
+ * \param id is the program identifier
+ * \return GL_TRUE if id is a program, else GL_FALSE.
+ */
+GLboolean GLAPIENTRY
+_mesa_IsProgramARB(GLuint id)
 {
-   GLfloat fparams[4];
+   struct gl_program *prog = NULL; 
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
 
-   _mesa_GetVertexAttribfvARB(index, pname, fparams);
-   if (ctx->ErrorValue == GL_NO_ERROR) {
-      if (pname == GL_CURRENT_VERTEX_ATTRIB_ARB) {
-         COPY_4V_CAST(params, fparams, GLint);  /* float to int */
-      }
-      else {
-         params[0] = (GLint) fparams[0];
-      }
-   }
-}
+   if (id == 0)
+      return GL_FALSE;
 
+   prog = _mesa_lookup_program(ctx, id);
+   if (prog && (prog != &_mesa_DummyProgram))
+      return GL_TRUE;
+   else
+      return GL_FALSE;
+}
 
-void GLAPIENTRY
-_mesa_GetVertexAttribPointervARB(GLuint index, GLenum pname, GLvoid **pointer)
+static GLboolean
+get_local_param_pointer(struct gl_context *ctx, const char *func,
+			GLenum target, GLuint index, GLfloat **param)
 {
-   GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
+   struct gl_program *prog;
+   GLuint maxParams;
 
-   if (index >= ctx->Const.MaxVertexProgramAttribs) {
-      _mesa_error(ctx, GL_INVALID_VALUE, "glGetVertexAttribPointerARB(index)");
-      return;
+   if (target == GL_VERTEX_PROGRAM_ARB
+       && ctx->Extensions.ARB_vertex_program) {
+      prog = &(ctx->VertexProgram.Current->Base);
+      maxParams = ctx->Const.VertexProgram.MaxLocalParams;
+   }
+   else if (target == GL_FRAGMENT_PROGRAM_ARB
+            && ctx->Extensions.ARB_fragment_program) {
+      prog = &(ctx->FragmentProgram.Current->Base);
+      maxParams = ctx->Const.FragmentProgram.MaxLocalParams;
+   }
+   else {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "%s(target)", func);
+      return GL_FALSE;
    }
 
-   if (pname != GL_VERTEX_ATTRIB_ARRAY_POINTER_ARB) {
-      _mesa_error(ctx, GL_INVALID_ENUM, "glGetVertexAttribPointerARB(pname)");
-      return;
+   if (index >= maxParams) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "%s(index)", func);
+      return GL_FALSE;
    }
 
-   *pointer = (GLvoid *) ctx->Array.VertexAttrib[index].Ptr;;
+   *param = prog->LocalParams[index];
+   return GL_TRUE;
 }
 
 
+static GLboolean
+get_env_param_pointer(struct gl_context *ctx, const char *func,
+		      GLenum target, GLuint index, GLfloat **param)
+{
+   if (target == GL_FRAGMENT_PROGRAM_ARB
+       && ctx->Extensions.ARB_fragment_program) {
+      if (index >= ctx->Const.FragmentProgram.MaxEnvParams) {
+         _mesa_error(ctx, GL_INVALID_VALUE, "%s(index)", func);
+         return GL_FALSE;
+      }
+      *param = ctx->FragmentProgram.Parameters[index];
+      return GL_TRUE;
+   }
+   else if (target == GL_VERTEX_PROGRAM_ARB &&
+            ctx->Extensions.ARB_vertex_program) {
+      if (index >= ctx->Const.VertexProgram.MaxEnvParams) {
+         _mesa_error(ctx, GL_INVALID_VALUE, "%s(index)", func);
+         return GL_FALSE;
+      }
+      *param = ctx->VertexProgram.Parameters[index];
+      return GL_TRUE;
+   } else {
+      _mesa_error(ctx, GL_INVALID_ENUM, "%s(target)", func);
+      return GL_FALSE;
+   }
+}
+
 void GLAPIENTRY
 _mesa_ProgramStringARB(GLenum target, GLenum format, GLsizei len,
                        const GLvoid *string)
 {
+   struct gl_program *base;
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 
-   if (target == GL_VERTEX_PROGRAM_ARB
-       && ctx->Extensions.ARB_vertex_program) {
-      struct vertex_program *prog = ctx->VertexProgram.Current;
-      if (format != GL_PROGRAM_FORMAT_ASCII_ARB) {
-         _mesa_error(ctx, GL_INVALID_ENUM, "glProgramStringARB(format)");
-         return;
-      }
-      _mesa_parse_arb_vertex_program(ctx, target, (const GLubyte *) string,
-                                     len, prog);
-      
-      if (ctx->Driver.ProgramStringNotify)
-	 ctx->Driver.ProgramStringNotify( ctx, target, &prog->Base );
+   if (!ctx->Extensions.ARB_vertex_program
+       && !ctx->Extensions.ARB_fragment_program) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glProgramStringARB()");
+      return;
+   }
+
+   if (format != GL_PROGRAM_FORMAT_ASCII_ARB) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glProgramStringARB(format)");
+      return;
+   }
+
+   if (target == GL_VERTEX_PROGRAM_ARB && ctx->Extensions.ARB_vertex_program) {
+      struct gl_vertex_program *prog = ctx->VertexProgram.Current;
+      _mesa_parse_arb_vertex_program(ctx, target, string, len, prog);
+
+      base = & prog->Base;
    }
    else if (target == GL_FRAGMENT_PROGRAM_ARB
             && ctx->Extensions.ARB_fragment_program) {
-      struct fragment_program *prog = ctx->FragmentProgram.Current;
-      if (format != GL_PROGRAM_FORMAT_ASCII_ARB) {
-         _mesa_error(ctx, GL_INVALID_ENUM, "glProgramStringARB(format)");
-         return;
-      }
-      _mesa_parse_arb_fragment_program(ctx, target, (const GLubyte *) string,
-                                       len, prog);
+      struct gl_fragment_program *prog = ctx->FragmentProgram.Current;
+      _mesa_parse_arb_fragment_program(ctx, target, string, len, prog);
 
-      if (ctx->Driver.ProgramStringNotify)
-	 ctx->Driver.ProgramStringNotify( ctx, target, &prog->Base );
+      base = & prog->Base;
    }
    else {
       _mesa_error(ctx, GL_INVALID_ENUM, "glProgramStringARB(target)");
       return;
    }
+
+   if (ctx->Program.ErrorPos == -1) {
+      /* finally, give the program to the driver for translation/checking */
+      if (!ctx->Driver.ProgramStringNotify(ctx, target, base)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glProgramStringARB(rejected by driver");
+      }
+   }
 }
 
 
+/**
+ * Set a program env parameter register.
+ * \note Called from the GL API dispatcher.
+ */
 void GLAPIENTRY
 _mesa_ProgramEnvParameter4dARB(GLenum target, GLuint index,
                                GLdouble x, GLdouble y, GLdouble z, GLdouble w)
@@ -235,6 +360,10 @@ _mesa_ProgramEnvParameter4dARB(GLenum target, GLuint index,
 }
 
 
+/**
+ * Set a program env parameter register.
+ * \note Called from the GL API dispatcher.
+ */
 void GLAPIENTRY
 _mesa_ProgramEnvParameter4dvARB(GLenum target, GLuint index,
                                 const GLdouble *params)
@@ -245,44 +374,87 @@ _mesa_ProgramEnvParameter4dvARB(GLenum target, GLuint index,
 }
 
 
+/**
+ * Set a program env parameter register.
+ * \note Called from the GL API dispatcher.
+ */
 void GLAPIENTRY
 _mesa_ProgramEnvParameter4fARB(GLenum target, GLuint index,
                                GLfloat x, GLfloat y, GLfloat z, GLfloat w)
 {
+   GLfloat *param;
+
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
-   FLUSH_VERTICES(ctx, _NEW_PROGRAM);
+   FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
+
+   if (get_env_param_pointer(ctx, "glProgramEnvParameter",
+			     target, index, &param)) {
+      ASSIGN_4V(param, x, y, z, w);
+   }
+}
+
+
+
+/**
+ * Set a program env parameter register.
+ * \note Called from the GL API dispatcher.
+ */
+void GLAPIENTRY
+_mesa_ProgramEnvParameter4fvARB(GLenum target, GLuint index,
+                                const GLfloat *params)
+{
+   GLfloat *param;
+
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
+
+   if (get_env_param_pointer(ctx, "glProgramEnvParameter4fv",
+			      target, index, &param)) {
+      memcpy(param, params, 4 * sizeof(GLfloat));
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_ProgramEnvParameters4fvEXT(GLenum target, GLuint index, GLsizei count,
+				 const GLfloat *params)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLfloat * dest;
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
+
+   if (count <= 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glProgramEnvParameters4fv(count)");
+   }
 
    if (target == GL_FRAGMENT_PROGRAM_ARB
        && ctx->Extensions.ARB_fragment_program) {
-      if (index >= ctx->Const.MaxFragmentProgramEnvParams) {
-         _mesa_error(ctx, GL_INVALID_VALUE, "glProgramEnvParameter(index)");
+      if ((index + count) > ctx->Const.FragmentProgram.MaxEnvParams) {
+         _mesa_error(ctx, GL_INVALID_VALUE, "glProgramEnvParameters4fv(index + count)");
          return;
       }
-      ASSIGN_4V(ctx->FragmentProgram.Parameters[index], x, y, z, w);
+      dest = ctx->FragmentProgram.Parameters[index];
    }
-   if (target == GL_VERTEX_PROGRAM_ARB
+   else if (target == GL_VERTEX_PROGRAM_ARB
        && ctx->Extensions.ARB_vertex_program) {
-      if (index >= ctx->Const.MaxVertexProgramEnvParams) {
-         _mesa_error(ctx, GL_INVALID_VALUE, "glProgramEnvParameter(index)");
+      if ((index + count) > ctx->Const.VertexProgram.MaxEnvParams) {
+         _mesa_error(ctx, GL_INVALID_VALUE, "glProgramEnvParameters4fv(index + count)");
          return;
       }
-      ASSIGN_4V(ctx->VertexProgram.Parameters[index], x, y, z, w);
+      dest = ctx->VertexProgram.Parameters[index];
    }
    else {
-      _mesa_error(ctx, GL_INVALID_ENUM, "glProgramEnvParameter(target)");
+      _mesa_error(ctx, GL_INVALID_ENUM, "glProgramEnvParameters4fv(target)");
       return;
    }
-}
-
 
-void GLAPIENTRY
-_mesa_ProgramEnvParameter4fvARB(GLenum target, GLuint index,
-                                   const GLfloat *params)
-{
-   _mesa_ProgramEnvParameter4fARB(target, index, params[0], params[1],
-                                  params[2], params[3]);
+   memcpy(dest, params, count * 4 * sizeof(GLfloat));
 }
 
 
@@ -291,14 +463,11 @@ _mesa_GetProgramEnvParameterdvARB(GLenum target, GLuint index,
                                   GLdouble *params)
 {
    GET_CURRENT_CONTEXT(ctx);
-   GLfloat fparams[4];
+   GLfloat *fparam;
 
-   _mesa_GetProgramEnvParameterfvARB(target, index, fparams);
-   if (ctx->ErrorValue == GL_NO_ERROR) {
-      params[0] = fparams[0];
-      params[1] = fparams[1];
-      params[2] = fparams[2];
-      params[3] = fparams[3];
+   if (get_env_param_pointer(ctx, "glGetProgramEnvParameterdv",
+			     target, index, &fparam)) {
+      COPY_4V(params, fparam);
    }
 }
 
@@ -307,95 +476,85 @@ void GLAPIENTRY
 _mesa_GetProgramEnvParameterfvARB(GLenum target, GLuint index, 
                                   GLfloat *params)
 {
-   GET_CURRENT_CONTEXT(ctx);
+   GLfloat *param;
 
-   FLUSH_VERTICES(ctx, _NEW_PROGRAM);
+   GET_CURRENT_CONTEXT(ctx);
 
-   if (!ctx->_CurrentProgram)
-      ASSERT_OUTSIDE_BEGIN_END(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
 
-   if (target == GL_FRAGMENT_PROGRAM_ARB
-       && ctx->Extensions.ARB_fragment_program) {
-      if (index >= ctx->Const.MaxFragmentProgramEnvParams) {
-         _mesa_error(ctx, GL_INVALID_VALUE, "glGetProgramEnvParameter(index)");
-         return;
-      }
-      COPY_4V(params, ctx->FragmentProgram.Parameters[index]);
-   }
-   if (target == GL_VERTEX_PROGRAM_ARB
-       && ctx->Extensions.ARB_vertex_program) {
-      if (index >= ctx->Const.MaxVertexProgramEnvParams) {
-         _mesa_error(ctx, GL_INVALID_VALUE, "glGetProgramEnvParameter(index)");
-         return;
-      }
-      COPY_4V(params, ctx->VertexProgram.Parameters[index]);
-   }
-   else {
-      _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramEnvParameter(target)");
-      return;
+   if (get_env_param_pointer(ctx, "glGetProgramEnvParameterfv",
+			      target, index, &param)) {
+      COPY_4V(params, param);
    }
 }
 
 
-/**
- * Note, this function is also used by the GL_NV_fragment_program extension.
- */
 void GLAPIENTRY
 _mesa_ProgramLocalParameter4fARB(GLenum target, GLuint index,
                                  GLfloat x, GLfloat y, GLfloat z, GLfloat w)
 {
    GET_CURRENT_CONTEXT(ctx);
-   struct program *prog;
+   GLfloat *param;
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
-   FLUSH_VERTICES(ctx, _NEW_PROGRAM);
+   FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
+
+   if (get_local_param_pointer(ctx, "glProgramLocalParameterARB",
+			       target, index, &param)) {
+      ASSERT(index < MAX_PROGRAM_LOCAL_PARAMS);
+      ASSIGN_4V(param, x, y, z, w);
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_ProgramLocalParameter4fvARB(GLenum target, GLuint index,
+                                  const GLfloat *params)
+{
+   _mesa_ProgramLocalParameter4fARB(target, index, params[0], params[1],
+                                    params[2], params[3]);
+}
+
 
-   if ((target == GL_FRAGMENT_PROGRAM_NV
-        && ctx->Extensions.NV_fragment_program) ||
-       (target == GL_FRAGMENT_PROGRAM_ARB
-        && ctx->Extensions.ARB_fragment_program)) {
-      if (index >= ctx->Const.MaxFragmentProgramLocalParams) {
-         _mesa_error(ctx, GL_INVALID_VALUE, "glProgramLocalParameterARB");
+void GLAPIENTRY
+_mesa_ProgramLocalParameters4fvEXT(GLenum target, GLuint index, GLsizei count,
+				   const GLfloat *params)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLfloat *dest;
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
+
+   if (count <= 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glProgramLocalParameters4fv(count)");
+   }
+
+   if (target == GL_FRAGMENT_PROGRAM_ARB
+       && ctx->Extensions.ARB_fragment_program) {
+      if ((index + count) > ctx->Const.FragmentProgram.MaxLocalParams) {
+         _mesa_error(ctx, GL_INVALID_VALUE, "glProgramLocalParameters4fvEXT(index + count)");
          return;
       }
-      prog = &(ctx->FragmentProgram.Current->Base);
+      dest = ctx->FragmentProgram.Current->Base.LocalParams[index];
    }
    else if (target == GL_VERTEX_PROGRAM_ARB
             && ctx->Extensions.ARB_vertex_program) {
-      if (index >= ctx->Const.MaxVertexProgramLocalParams) {
-         _mesa_error(ctx, GL_INVALID_VALUE, "glProgramLocalParameterARB");
+      if ((index + count) > ctx->Const.VertexProgram.MaxLocalParams) {
+         _mesa_error(ctx, GL_INVALID_VALUE, "glProgramLocalParameters4fvEXT(index + count)");
          return;
       }
-      prog = &(ctx->VertexProgram.Current->Base);
+      dest = ctx->VertexProgram.Current->Base.LocalParams[index];
    }
    else {
-      _mesa_error(ctx, GL_INVALID_ENUM, "glProgramLocalParameterARB");
+      _mesa_error(ctx, GL_INVALID_ENUM, "glProgramLocalParameters4fvEXT(target)");
       return;
    }
 
-   ASSERT(index < MAX_PROGRAM_LOCAL_PARAMS);
-   prog->LocalParams[index][0] = x;
-   prog->LocalParams[index][1] = y;
-   prog->LocalParams[index][2] = z;
-   prog->LocalParams[index][3] = w;
-}
-
-
-/**
- * Note, this function is also used by the GL_NV_fragment_program extension.
- */
-void GLAPIENTRY
-_mesa_ProgramLocalParameter4fvARB(GLenum target, GLuint index,
-                                  const GLfloat *params)
-{
-   _mesa_ProgramLocalParameter4fARB(target, index, params[0], params[1],
-                                    params[2], params[3]);
+   memcpy(dest, params, count * 4 * sizeof(GLfloat));
 }
 
 
-/**
- * Note, this function is also used by the GL_NV_fragment_program extension.
- */
 void GLAPIENTRY
 _mesa_ProgramLocalParameter4dARB(GLenum target, GLuint index,
                                  GLdouble x, GLdouble y,
@@ -406,9 +565,6 @@ _mesa_ProgramLocalParameter4dARB(GLenum target, GLuint index,
 }
 
 
-/**
- * Note, this function is also used by the GL_NV_fragment_program extension.
- */
 void GLAPIENTRY
 _mesa_ProgramLocalParameter4dvARB(GLenum target, GLuint index,
                                   const GLdouble *params)
@@ -419,63 +575,32 @@ _mesa_ProgramLocalParameter4dvARB(GLenum target, GLuint index,
 }
 
 
-/**
- * Note, this function is also used by the GL_NV_fragment_program extension.
- */
 void GLAPIENTRY
 _mesa_GetProgramLocalParameterfvARB(GLenum target, GLuint index,
                                     GLfloat *params)
 {
-   const struct program *prog;
-   GLuint maxParams;
+   GLfloat *param;
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
-   if (target == GL_VERTEX_PROGRAM_ARB
-       && ctx->Extensions.ARB_vertex_program) {
-      prog = &(ctx->VertexProgram.Current->Base);
-      maxParams = ctx->Const.MaxVertexProgramLocalParams;
-   }
-   else if (target == GL_FRAGMENT_PROGRAM_ARB
-            && ctx->Extensions.ARB_fragment_program) {
-      prog = &(ctx->FragmentProgram.Current->Base);
-      maxParams = ctx->Const.MaxFragmentProgramLocalParams;
-   }
-   else if (target == GL_FRAGMENT_PROGRAM_NV
-            && ctx->Extensions.NV_fragment_program) {
-      prog = &(ctx->FragmentProgram.Current->Base);
-      maxParams = MAX_NV_FRAGMENT_PROGRAM_PARAMS;
-   }
-   else {
-      _mesa_error(ctx, GL_INVALID_ENUM,
-                  "glGetProgramLocalParameterARB(target)");
-      return;
-   }
-
-   if (index >= maxParams) {
-      _mesa_error(ctx, GL_INVALID_VALUE,
-                  "glGetProgramLocalParameterARB(index)");
-      return;
+   if (get_local_param_pointer(ctx, "glProgramLocalParameters4fvEXT",
+				target, index, &param)) {
+      COPY_4V(params, param);
    }
-
-   ASSERT(prog);
-   ASSERT(index < MAX_PROGRAM_LOCAL_PARAMS);
-   COPY_4V(params, prog->LocalParams[index]);
 }
 
 
-/**
- * Note, this function is also used by the GL_NV_fragment_program extension.
- */
 void GLAPIENTRY
 _mesa_GetProgramLocalParameterdvARB(GLenum target, GLuint index,
                                     GLdouble *params)
 {
+   GLfloat *param;
    GET_CURRENT_CONTEXT(ctx);
-   GLfloat floatParams[4];
-   _mesa_GetProgramLocalParameterfvARB(target, index, floatParams);
-   if (ctx->ErrorValue == GL_NO_ERROR) {
-      COPY_4V(params, floatParams);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (get_local_param_pointer(ctx, "glProgramLocalParameters4fvEXT",
+				target, index, &param)) {
+      COPY_4V(params, param);
    }
 }
 
@@ -483,19 +608,21 @@ _mesa_GetProgramLocalParameterdvARB(GLenum target, GLuint index,
 void GLAPIENTRY
 _mesa_GetProgramivARB(GLenum target, GLenum pname, GLint *params)
 {
-   struct program *prog;
+   const struct gl_program_constants *limits;
+   struct gl_program *prog;
    GET_CURRENT_CONTEXT(ctx);
 
-   if (!ctx->_CurrentProgram)
-      ASSERT_OUTSIDE_BEGIN_END(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (target == GL_VERTEX_PROGRAM_ARB
        && ctx->Extensions.ARB_vertex_program) {
       prog = &(ctx->VertexProgram.Current->Base);
+      limits = &ctx->Const.VertexProgram;
    }
    else if (target == GL_FRAGMENT_PROGRAM_ARB
             && ctx->Extensions.ARB_fragment_program) {
       prog = &(ctx->FragmentProgram.Current->Base);
+      limits = &ctx->Const.FragmentProgram;
    }
    else {
       _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramivARB(target)");
@@ -503,188 +630,161 @@ _mesa_GetProgramivARB(GLenum target, GLenum pname, GLint *params)
    }
 
    ASSERT(prog);
+   ASSERT(limits);
 
+   /* Queries supported for both vertex and fragment programs */
    switch (pname) {
       case GL_PROGRAM_LENGTH_ARB:
-         *params = prog->String ? _mesa_strlen((char *) prog->String) : 0;
-         break;
+         *params
+            = prog->String ? (GLint) strlen((char *) prog->String) : 0;
+         return;
       case GL_PROGRAM_FORMAT_ARB:
          *params = prog->Format;
-         break;
+         return;
       case GL_PROGRAM_BINDING_ARB:
          *params = prog->Id;
-         break;
+         return;
       case GL_PROGRAM_INSTRUCTIONS_ARB:
          *params = prog->NumInstructions;
-         break;
+         return;
       case GL_MAX_PROGRAM_INSTRUCTIONS_ARB:
-         if (target == GL_VERTEX_PROGRAM_ARB)
-            *params = ctx->Const.MaxVertexProgramInstructions;
-         else
-            *params = ctx->Const.MaxFragmentProgramInstructions;
-         break;
+         *params = limits->MaxInstructions;
+         return;
       case GL_PROGRAM_NATIVE_INSTRUCTIONS_ARB:
-         *params = prog->NumInstructions;
-         break;
+         *params = prog->NumNativeInstructions;
+         return;
       case GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB:
-         if (target == GL_VERTEX_PROGRAM_ARB)
-            *params = ctx->Const.MaxVertexProgramInstructions;
-         else
-            *params = ctx->Const.MaxFragmentProgramInstructions;
-         break;
+         *params = limits->MaxNativeInstructions;
+         return;
       case GL_PROGRAM_TEMPORARIES_ARB:
          *params = prog->NumTemporaries;
-         break;
+         return;
       case GL_MAX_PROGRAM_TEMPORARIES_ARB:
-         if (target == GL_VERTEX_PROGRAM_ARB)
-            *params = ctx->Const.MaxVertexProgramTemps;
-         else
-            *params = ctx->Const.MaxFragmentProgramTemps;
-         break;
+         *params = limits->MaxTemps;
+         return;
       case GL_PROGRAM_NATIVE_TEMPORARIES_ARB:
-         /* XXX same as GL_PROGRAM_TEMPORARIES_ARB? */
-         *params = prog->NumTemporaries;
-         break;
+         *params = prog->NumNativeTemporaries;
+         return;
       case GL_MAX_PROGRAM_NATIVE_TEMPORARIES_ARB:
-         /* XXX same as GL_MAX_PROGRAM_TEMPORARIES_ARB? */
-         if (target == GL_VERTEX_PROGRAM_ARB)
-            *params = ctx->Const.MaxVertexProgramTemps;
-         else
-            *params = ctx->Const.MaxFragmentProgramTemps;
-         break;
+         *params = limits->MaxNativeTemps;
+         return;
       case GL_PROGRAM_PARAMETERS_ARB:
          *params = prog->NumParameters;
-         break;
+         return;
       case GL_MAX_PROGRAM_PARAMETERS_ARB:
-         if (target == GL_VERTEX_PROGRAM_ARB)
-            *params = ctx->Const.MaxVertexProgramLocalParams;
-         else
-            *params = ctx->Const.MaxFragmentProgramLocalParams;
-         break;
+         *params = limits->MaxParameters;
+         return;
       case GL_PROGRAM_NATIVE_PARAMETERS_ARB:
-         /* XXX same as GL_MAX_PROGRAM_PARAMETERS_ARB? */
-         *params = prog->NumParameters;
-         break;
+         *params = prog->NumNativeParameters;
+         return;
       case GL_MAX_PROGRAM_NATIVE_PARAMETERS_ARB:
-         /* XXX same as GL_MAX_PROGRAM_PARAMETERS_ARB? */
-         if (target == GL_VERTEX_PROGRAM_ARB)
-            *params = ctx->Const.MaxVertexProgramLocalParams;
-         else
-            *params = ctx->Const.MaxFragmentProgramLocalParams;
-         break;
+         *params = limits->MaxNativeParameters;
+         return;
       case GL_PROGRAM_ATTRIBS_ARB:
          *params = prog->NumAttributes;
-         break;
+         return;
       case GL_MAX_PROGRAM_ATTRIBS_ARB:
-         if (target == GL_VERTEX_PROGRAM_ARB)
-            *params = ctx->Const.MaxVertexProgramAttribs;
-         else
-            *params = ctx->Const.MaxFragmentProgramAttribs;
-         break;
+         *params = limits->MaxAttribs;
+         return;
       case GL_PROGRAM_NATIVE_ATTRIBS_ARB:
-         /* XXX same as GL_PROGRAM_ATTRIBS_ARB? */
-         *params = prog->NumAttributes;
-         break;
+         *params = prog->NumNativeAttributes;
+         return;
       case GL_MAX_PROGRAM_NATIVE_ATTRIBS_ARB:
-         /* XXX same as GL_MAX_PROGRAM_ATTRIBS_ARB? */
-         if (target == GL_VERTEX_PROGRAM_ARB)
-            *params = ctx->Const.MaxVertexProgramAttribs;
-         else
-            *params = ctx->Const.MaxFragmentProgramAttribs;
-         break;
+         *params = limits->MaxNativeAttribs;
+         return;
       case GL_PROGRAM_ADDRESS_REGISTERS_ARB:
          *params = prog->NumAddressRegs;
-         break;
+         return;
       case GL_MAX_PROGRAM_ADDRESS_REGISTERS_ARB:
-         if (target == GL_VERTEX_PROGRAM_ARB)
-            *params = ctx->Const.MaxVertexProgramAddressRegs;
-         else
-            *params = ctx->Const.MaxFragmentProgramAddressRegs;
-         break;
+         *params = limits->MaxAddressRegs;
+         return;
       case GL_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB:
-         /* XXX same as GL_PROGRAM_ADDRESS_REGISTERS_ARB? */
-         *params = prog->NumAddressRegs;
-         break;
+         *params = prog->NumNativeAddressRegs;
+         return;
       case GL_MAX_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB:
-         /* XXX same as GL_MAX_PROGRAM_ADDRESS_REGISTERS_ARB? */
-         if (target == GL_VERTEX_PROGRAM_ARB)
-            *params = ctx->Const.MaxVertexProgramAddressRegs;
-         else
-            *params = ctx->Const.MaxFragmentProgramAddressRegs;
-         break;
+         *params = limits->MaxNativeAddressRegs;
+         return;
       case GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB:
-         if (target == GL_VERTEX_PROGRAM_ARB)
-            *params = ctx->Const.MaxVertexProgramLocalParams;
-         else
-            *params = ctx->Const.MaxFragmentProgramLocalParams;
-         break;
+         *params = limits->MaxLocalParams;
+         return;
       case GL_MAX_PROGRAM_ENV_PARAMETERS_ARB:
-         if (target == GL_VERTEX_PROGRAM_ARB)
-            *params = ctx->Const.MaxVertexProgramEnvParams;
-         else
-            *params = ctx->Const.MaxFragmentProgramEnvParams;
-         break;
+         *params = limits->MaxEnvParams;
+         return;
       case GL_PROGRAM_UNDER_NATIVE_LIMITS_ARB:
-	 if (ctx->Driver.IsProgramNative) 
+         /*
+          * XXX we may not really need a driver callback here.
+          * If the number of native instructions, registers, etc. used
+          * are all below the maximums, we could return true.
+          * The spec says that even if this query returns true, there's
+          * no guarantee that the program will run in hardware.
+          */
+         if (prog->Id == 0) {
+            /* default/null program */
+            *params = GL_FALSE;
+         }
+	 else if (ctx->Driver.IsProgramNative) {
+            /* ask the driver */
 	    *params = ctx->Driver.IsProgramNative( ctx, target, prog );
-	 else
+         }
+	 else {
+            /* probably running in software */
 	    *params = GL_TRUE;
+         }
+         return;
+      default:
+         /* continue with fragment-program only queries below */
          break;
+   }
 
-      /*
-       * The following apply to fragment programs only.
-       */
-      case GL_PROGRAM_ALU_INSTRUCTIONS_ARB:
-      case GL_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB:
-         if (target != GL_FRAGMENT_PROGRAM_ARB) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramivARB(target)");
+   /*
+    * The following apply to fragment programs only (at this time)
+    */
+   if (target == GL_FRAGMENT_PROGRAM_ARB) {
+      const struct gl_fragment_program *fp = ctx->FragmentProgram.Current;
+      switch (pname) {
+         case GL_PROGRAM_ALU_INSTRUCTIONS_ARB:
+            *params = fp->Base.NumNativeAluInstructions;
             return;
-         }
-         *params = ctx->FragmentProgram.Current->NumAluInstructions;
-         break;
-      case GL_PROGRAM_TEX_INSTRUCTIONS_ARB:
-      case GL_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB:
-         if (target != GL_FRAGMENT_PROGRAM_ARB) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramivARB(target)");
+         case GL_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB:
+            *params = fp->Base.NumAluInstructions;
             return;
-         }
-         *params = ctx->FragmentProgram.Current->NumTexInstructions;
-         break;
-      case GL_PROGRAM_TEX_INDIRECTIONS_ARB:
-      case GL_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB:
-         if (target != GL_FRAGMENT_PROGRAM_ARB) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramivARB(target)");
+         case GL_PROGRAM_TEX_INSTRUCTIONS_ARB:
+            *params = fp->Base.NumTexInstructions;
             return;
-         }
-         *params = ctx->FragmentProgram.Current->NumTexIndirections;
-         break;
-      case GL_MAX_PROGRAM_ALU_INSTRUCTIONS_ARB:
-      case GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB:
-         if (target != GL_FRAGMENT_PROGRAM_ARB) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramivARB(target)");
+         case GL_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB:
+            *params = fp->Base.NumNativeTexInstructions;
             return;
-         }
-         *params = ctx->Const.MaxFragmentProgramAluInstructions;
-         break;
-      case GL_MAX_PROGRAM_TEX_INSTRUCTIONS_ARB:
-      case GL_MAX_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB:
-         if (target != GL_FRAGMENT_PROGRAM_ARB) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramivARB(target)");
+         case GL_PROGRAM_TEX_INDIRECTIONS_ARB:
+            *params = fp->Base.NumTexIndirections;
             return;
-         }
-         *params = ctx->Const.MaxFragmentProgramTexInstructions;
-         break;
-      case GL_MAX_PROGRAM_TEX_INDIRECTIONS_ARB:
-      case GL_MAX_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB:
-         if (target != GL_FRAGMENT_PROGRAM_ARB) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramivARB(target)");
+         case GL_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB:
+            *params = fp->Base.NumNativeTexIndirections;
             return;
-         }
-         *params = ctx->Const.MaxFragmentProgramTexIndirections;
-         break;
-      default:
-         _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramivARB(pname)");
-         return;
+         case GL_MAX_PROGRAM_ALU_INSTRUCTIONS_ARB:
+            *params = limits->MaxAluInstructions;
+            return;
+         case GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB:
+            *params = limits->MaxNativeAluInstructions;
+            return;
+         case GL_MAX_PROGRAM_TEX_INSTRUCTIONS_ARB:
+            *params = limits->MaxTexInstructions;
+            return;
+         case GL_MAX_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB:
+            *params = limits->MaxNativeTexInstructions;
+            return;
+         case GL_MAX_PROGRAM_TEX_INDIRECTIONS_ARB:
+            *params = limits->MaxTexIndirections;
+            return;
+         case GL_MAX_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB:
+            *params = limits->MaxNativeTexIndirections;
+            return;
+         default:
+            _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramivARB(pname)");
+            return;
+      }
+   } else {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramivARB(pname)");
+      return;
    }
 }
 
@@ -692,11 +792,11 @@ _mesa_GetProgramivARB(GLenum target, GLenum pname, GLint *params)
 void GLAPIENTRY
 _mesa_GetProgramStringARB(GLenum target, GLenum pname, GLvoid *string)
 {
-   struct program *prog;
+   const struct gl_program *prog;
+   char *dst = (char *) string;
    GET_CURRENT_CONTEXT(ctx);
 
-   if (!ctx->_CurrentProgram)
-      ASSERT_OUTSIDE_BEGIN_END(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    if (target == GL_VERTEX_PROGRAM_ARB) {
       prog = &(ctx->VertexProgram.Current->Base);
@@ -716,6 +816,8 @@ _mesa_GetProgramStringARB(GLenum target, GLenum pname, GLvoid *string)
       return;
    }
 
-   MEMCPY(string, prog->String, _mesa_strlen((char *) prog->String));
+   if (prog->String)
+      memcpy(dst, prog->String, strlen((char *) prog->String));
+   else
+      *dst = '\0';
 }
-