From 6e6d4c66bd7fd64162ee453b143d7388bb051444 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Sat, 9 Oct 1999 20:17:07 +0000
Subject: texture units now share default texture objects

---
 src/mesa/main/context.c | 39 +++++++++++++++++----------------------
 src/mesa/main/texobj.c  | 22 +++++++++++++++++-----
 2 files changed, 34 insertions(+), 27 deletions(-)

diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index 47cba24ee5..899558f4a7 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -1,4 +1,4 @@
-/* $Id: context.c,v 1.10 1999/10/08 09:27:10 keithw Exp $ */
+/* $Id: context.c,v 1.11 1999/10/09 20:17:07 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -327,7 +327,7 @@ static void one_time_init( void )
  */
 static struct gl_shared_state *alloc_shared_state( void )
 {
-   GLuint i;
+   GLuint d;
    struct gl_shared_state *ss;
    GLboolean outOfMemory;
 
@@ -341,16 +341,13 @@ static struct gl_shared_state *alloc_shared_state( void )
 
    /* Default Texture objects */
    outOfMemory = GL_FALSE;
-   for (i=0;i<MAX_TEXTURE_UNITS;i++) {
-      GLuint d;
-      for (d = 1 ; d <= 3 ; d++) {
-	 ss->DefaultD[d][i] = gl_alloc_texture_object(ss, 0, d);
-	 if (!ss->DefaultD[d][i]) {
-	    outOfMemory = GL_TRUE;
-	    break;
-	 }
-	 ss->DefaultD[d][i]->RefCount++; /* don't free if not in use */
+   for (d = 1 ; d <= 3 ; d++) {
+      ss->DefaultD[d] = gl_alloc_texture_object(ss, 0, d);
+      if (!ss->DefaultD[d]) {
+         outOfMemory = GL_TRUE;
+         break;
       }
+      ss->DefaultD[d]->RefCount++; /* don't free if not in use */
    }
 
    if (!ss->DisplayList || !ss->TexObjects || outOfMemory) {
@@ -359,14 +356,12 @@ static struct gl_shared_state *alloc_shared_state( void )
          DeleteHashTable(ss->DisplayList);
       if (ss->TexObjects)
          DeleteHashTable(ss->TexObjects);
-      for (i=0;i<MAX_TEXTURE_UNITS;i++) {
-         if (ss->DefaultD[1][i])
-            gl_free_texture_object(ss, ss->DefaultD[1][i]);
-         if (ss->DefaultD[2][i])
-            gl_free_texture_object(ss, ss->DefaultD[2][i]);
-         if (ss->DefaultD[3][i])
-            gl_free_texture_object(ss, ss->DefaultD[3][i]);
-      }
+      if (ss->DefaultD[1])
+         gl_free_texture_object(ss, ss->DefaultD[1]);
+      if (ss->DefaultD[2])
+         gl_free_texture_object(ss, ss->DefaultD[2]);
+      if (ss->DefaultD[3])
+         gl_free_texture_object(ss, ss->DefaultD[3]);
       free(ss);
       return NULL;
    }
@@ -486,9 +481,9 @@ static void init_texture_unit( GLcontext *ctx, GLuint unit )
    ASSIGN_4V( texUnit->EyePlaneR, 0.0, 0.0, 0.0, 0.0 );
    ASSIGN_4V( texUnit->EyePlaneQ, 0.0, 0.0, 0.0, 0.0 );
 
-   texUnit->CurrentD[1] = ctx->Shared->DefaultD[1][unit];
-   texUnit->CurrentD[2] = ctx->Shared->DefaultD[2][unit];
-   texUnit->CurrentD[3] = ctx->Shared->DefaultD[3][unit];
+   texUnit->CurrentD[1] = ctx->Shared->DefaultD[1];
+   texUnit->CurrentD[2] = ctx->Shared->DefaultD[2];
+   texUnit->CurrentD[3] = ctx->Shared->DefaultD[3];
 }
 
 
diff --git a/src/mesa/main/texobj.c b/src/mesa/main/texobj.c
index 0d2f5dd9f2..b95911613b 100644
--- a/src/mesa/main/texobj.c
+++ b/src/mesa/main/texobj.c
@@ -1,4 +1,4 @@
-/* $Id: texobj.c,v 1.3 1999/10/08 09:27:11 keithw Exp $ */
+/* $Id: texobj.c,v 1.4 1999/10/09 20:17:07 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -71,6 +71,7 @@ gl_alloc_texture_object( struct gl_shared_state *shared, GLuint name,
                      calloc(1,sizeof(struct gl_texture_object));
    if (obj) {
       /* init the non-zero fields */
+      obj->RefCount = 1;
       obj->Name = name;
       obj->Dimensions = dimensions;
       obj->WrapS = GL_REPEAT;
@@ -382,8 +383,8 @@ void gl_DeleteTextures( GLcontext *ctx, GLsizei n, const GLuint *texName)
 	       GLuint d;
 	       for (d = 1 ; d <= 3 ; d++) {
 		  if (unit->CurrentD[d]==t) {
-		     unit->CurrentD[d] = ctx->Shared->DefaultD[d][u];
-		     ctx->Shared->DefaultD[d][u]->RefCount++;
+		     unit->CurrentD[d] = ctx->Shared->DefaultD[d];
+		     ctx->Shared->DefaultD[d]->RefCount++;
 		     t->RefCount--;
 		     assert( t->RefCount >= 0 );
 		  }
@@ -436,7 +437,7 @@ void gl_BindTexture( GLcontext *ctx, GLenum target, GLuint texName )
       return;
 
    if (texName == 0) 
-      newTexObj = ctx->Shared->DefaultD[unit][dim];
+      newTexObj = ctx->Shared->DefaultD[dim];
    else {
       struct HashTable *hash = ctx->Shared->TexObjects;
       newTexObj = (struct gl_texture_object *) HashLookup(hash, texName);
@@ -453,8 +454,8 @@ void gl_BindTexture( GLcontext *ctx, GLenum target, GLuint texName )
       }
    }
 
-   oldTexObj->RefCount--;
    newTexObj->RefCount++;
+
    texUnit->CurrentD[dim] = newTexObj;
 
    /* If we've changed the CurrentD[123] texture object then update the
@@ -482,6 +483,17 @@ void gl_BindTexture( GLcontext *ctx, GLenum target, GLuint texName )
    if (ctx->Driver.BindTexture) {
       (*ctx->Driver.BindTexture)( ctx, target, newTexObj );
    }
+
+   if (oldTexObj->Name > 0) {
+      /* never delete default (id=0) texture objects */
+      oldTexObj->RefCount--;
+      if (oldTexObj->RefCount <= 0) {
+         if (ctx->Driver.DeleteTexture) {
+	    (*ctx->Driver.DeleteTexture)( ctx, oldTexObj );
+	 }
+         gl_free_texture_object(ctx->Shared, oldTexObj);
+      }
+   }
 }
 
 
-- 
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