From 4e713913fb88bc221eea1a18822cc782ca39af4d Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Tue, 20 Jan 2004 15:24:50 +0000
Subject: Undo some bits from last check-in related to the
 ctx->Driver.NewTextureObject functions.  Don't allocate the driver-specific
 data during texture object creation but do it later as needed (as code
 originally was).

---
 src/mesa/drivers/dri/sis/sis_tex.c | 48 +++++++++++++++++++++++---------------
 1 file changed, 29 insertions(+), 19 deletions(-)

(limited to 'src/mesa/drivers/dri/sis/sis_tex.c')

diff --git a/src/mesa/drivers/dri/sis/sis_tex.c b/src/mesa/drivers/dri/sis/sis_tex.c
index ece0c519b7..e100e8e6a6 100644
--- a/src/mesa/drivers/dri/sis/sis_tex.c
+++ b/src/mesa/drivers/dri/sis/sis_tex.c
@@ -161,9 +161,17 @@ sisBindTexture( GLcontext *ctx, GLenum target,
                 struct gl_texture_object *texObj )
 {
    sisContextPtr smesa = SIS_CONTEXT(ctx);
-   sisTexObjPtr t = texObj->DriverData;
+   sisTexObjPtr t;
 
-   assert(t);
+   if ( target == GL_TEXTURE_2D || target == GL_TEXTURE_1D ) {
+      if ( texObj->DriverData == NULL ) {
+         sisAllocTexObj( texObj );
+      }
+   }
+
+   t = texObj->DriverData;
+   if (!t)
+      return;
 
    if (smesa->PrevTexFormat[ctx->Texture.CurrentUnit] != t->format) {
       smesa->TexStates[ctx->Texture.CurrentUnit] |= NEW_TEXTURE_ENV;
@@ -182,7 +190,6 @@ sisDeleteTexture( GLcontext * ctx, struct gl_texture_object *texObj )
    smesa->clearTexCache = GL_TRUE;
 
    t = texObj->DriverData;
-   assert(t);
    if (t == NULL) {
       /* 
        * this shows the texture is default object and never be a 
@@ -276,9 +283,12 @@ static void sisTexImage1D( GLcontext *ctx, GLenum target, GLint level,
 			     struct gl_texture_image *texImage )
 {
    sisContextPtr smesa = SIS_CONTEXT(ctx);
-   sisTexObjPtr t = texObj->DriverData;
+   sisTexObjPtr t;
+
+   if ( texObj->DriverData == NULL )
+      sisAllocTexObj( texObj );
+   t = texObj->DriverData;
 
-   assert(t);
    /* Note, this will call sisChooseTextureFormat */
    _mesa_store_teximage1d( ctx, target, level, internalFormat,
 			   width, border, format, type,
@@ -312,13 +322,15 @@ static void sisTexSubImage1D( GLcontext *ctx,
 				struct gl_texture_image *texImage )
 {
    sisContextPtr smesa = SIS_CONTEXT(ctx);
-   sisTexObjPtr t = texObj->DriverData;
+   sisTexObjPtr t;
    GLuint copySize;
    GLint texelBytes;
    const char *src;
    GLubyte *dst;
 
-   assert(t);
+   if ( texObj->DriverData == NULL )
+      sisAllocTexObj( texObj );
+   t = texObj->DriverData;
 
    _mesa_store_texsubimage1d(ctx, target, level, xoffset, width,
 			     format, type, pixels, packing, texObj,
@@ -356,9 +368,11 @@ static void sisTexImage2D( GLcontext *ctx, GLenum target, GLint level,
 			     struct gl_texture_image *texImage )
 {
    sisContextPtr smesa = SIS_CONTEXT(ctx);
-   sisTexObjPtr t = texObj->DriverData;
+   sisTexObjPtr t;
 
-   assert(t);
+   if ( texObj->DriverData == NULL )
+      sisAllocTexObj( texObj );
+   t = texObj->DriverData;
 
    /* Note, this will call sisChooseTextureFormat */
    _mesa_store_teximage2d(ctx, target, level, internalFormat,
@@ -392,7 +406,7 @@ static void sisTexSubImage2D( GLcontext *ctx,
 				struct gl_texture_image *texImage )
 {
    sisContextPtr smesa = SIS_CONTEXT(ctx);
-   sisTexObjPtr t = texObj->DriverData;
+   sisTexObjPtr t;
    GLuint copySize;
    GLint texelBytes;
    const char *src;
@@ -400,7 +414,9 @@ static void sisTexSubImage2D( GLcontext *ctx,
    int j;
    GLuint soffset;
 
-   assert(t);
+   if ( texObj->DriverData == NULL )
+      sisAllocTexObj( texObj );
+   t = texObj->DriverData;
 
    _mesa_store_texsubimage2d(ctx, target, level, xoffset, yoffset, width,
 			     height, format, type, pixels, packing, texObj,
@@ -442,20 +458,14 @@ static void sisTexSubImage2D( GLcontext *ctx,
  * Called via ctx->Driver.NewTextureObject.
  * Note: this function will be called during context creation to
  * allocate the default texture objects.
+ * Note: we could use containment here to 'derive' the driver-specific
+ * texture object from the core mesa gl_texture_object.  Not done at this time.
  */
 static struct gl_texture_object *
 sisNewTextureObject( GLcontext *ctx, GLuint name, GLenum target )
 {
    struct gl_texture_object *obj;
-   sisTexObjPtr t;
    obj = _mesa_new_texture_object(ctx, name, target);
-   if (!obj)
-      return NULL;
-   t = (sisTexObjPtr) sisAllocTexObj( obj );
-   if (!t) {
-      _mesa_delete_texture_object(ctx, obj);
-      return NULL;
-   }
    return obj;
 }
 
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