mesa: add new DeleteTextureImage() driver hook

Matches the NewTextureImage() hook.  With new subclasses of
gl_texture_image coming we need a new hook to properly delete objects of
those subclasses.

src/mesa/drivers/common/driverfuncs.c

@@ -111,6 +111,7 @@ _mesa_init_driver_functions(struct dd_function_table *driver)
    driver->NewTextureObject = _mesa_new_texture_object;
    driver->DeleteTexture = _mesa_delete_texture_object;
    driver->NewTextureImage = _mesa_new_texture_image;
+   driver->DeleteTextureImage = _mesa_delete_texture_image;
    driver->FreeTextureImageBuffer = _mesa_free_texture_image_data;
    driver->MapTextureImage = _swrast_map_teximage;
    driver->UnmapTextureImage = _swrast_unmap_teximage;

src/mesa/drivers/dri/intel/intel_tex.c

@@ -18,6 +18,13 @@ intelNewTextureImage(struct gl_context * ctx)
    return (struct gl_texture_image *) CALLOC_STRUCT(intel_texture_image);
 }
 
+static void
+intelDeleteTextureImage(struct gl_context * ctx, struct gl_texture_image *img)
+{
+   /* nothing special (yet) for intel_texture_image */
+   _mesa_delete_texture_image(ctx, img);
+}
+
 
 static struct gl_texture_object *
 intelNewTextureObject(struct gl_context * ctx, GLuint name, GLenum target)
@@ -207,6 +214,7 @@ intelInitTextureFuncs(struct dd_function_table *functions)
 
    functions->NewTextureObject = intelNewTextureObject;
    functions->NewTextureImage = intelNewTextureImage;
+   functions->DeleteTextureImage = intelDeleteTextureImage;
    functions->DeleteTexture = intelDeleteTextureObject;
    functions->FreeTextureImageBuffer = intel_free_texture_image_buffer;
    functions->MapTextureImage = intel_map_texture_image;

src/mesa/drivers/dri/radeon/radeon_texture.c

@@ -83,6 +83,13 @@ struct gl_texture_image *radeonNewTextureImage(struct gl_context *ctx)
 	return CALLOC(sizeof(radeon_texture_image));
 }
 
+static void
+radeonDeleteTextureImage(struct gl_context * ctx, struct gl_texture_image *img)
+{
+   /* nothing special (yet) for radeon_texture_image */
+   _mesa_delete_texture_image(ctx, img);
+}
+
 /**
  * Free memory associated with this texture image.
  */
@@ -1162,6 +1169,7 @@ radeon_init_common_texture_funcs(radeonContextPtr radeon,
 				 struct dd_function_table *functions)
 {
 	functions->NewTextureImage = radeonNewTextureImage;
+	functions->DeleteTextureImage = radeonDeleteTextureImage;
 	functions->FreeTextureImageBuffer = radeonFreeTextureImageBuffer;
 	functions->MapTexture = radeonMapTexture;
 	functions->UnmapTexture = radeonUnmapTexture;

src/mesa/main/dd.h

@@ -476,6 +476,10 @@ struct dd_function_table {
     */
    struct gl_texture_image * (*NewTextureImage)( struct gl_context *ctx );
 
+   /** Called to free a texture image object returned by NewTextureImage() */
+   void (*DeleteTextureImage)(struct gl_context *ctx,
+                              struct gl_texture_image *);
+
    /** 
     * Called to free tImage->Data.
     */

src/mesa/main/teximage.c

@@ -601,7 +601,8 @@ _mesa_free_texture_image_data(struct gl_context *ctx,
 
 
 /**
- * Free texture image.
+ * Free a gl_texture_image and associated data.
+ * This function is a fallback called via ctx->Driver.DeleteTextureImage().
  *
  * \param texImage texture image.
  *

src/mesa/main/texobj.c

@@ -202,7 +202,7 @@ _mesa_delete_texture_object(struct gl_context *ctx,
    for (face = 0; face < 6; face++) {
       for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
          if (texObj->Image[face][i]) {
-            _mesa_delete_texture_image( ctx, texObj->Image[face][i] );
+            ctx->Driver.DeleteTextureImage(ctx, texObj->Image[face][i]);
          }
       }
    }

src/mesa/state_tracker/st_cb_texture.c

@@ -105,6 +105,15 @@ st_NewTextureImage(struct gl_context * ctx)
 }
 
 
+/** called via ctx->Driver.DeleteTextureImage() */
+static void
+st_DeleteTextureImage(struct gl_context * ctx, struct gl_texture_image *img)
+{
+   /* nothing special (yet) for st_texture_image */
+   _mesa_delete_texture_image(ctx, img);
+}
+
+
 /** called via ctx->Driver.NewTextureObject() */
 static struct gl_texture_object *
 st_NewTextureObject(struct gl_context * ctx, GLuint name, GLenum target)
@@ -1918,6 +1927,7 @@ st_init_texture_functions(struct dd_function_table *functions)
 
    functions->NewTextureObject = st_NewTextureObject;
    functions->NewTextureImage = st_NewTextureImage;
+   functions->DeleteTextureImage = st_DeleteTextureImage;
    functions->DeleteTexture = st_DeleteTextureObject;
    functions->FreeTextureImageBuffer = st_FreeTextureImageBuffer;
    functions->MapTextureImage = st_MapTextureImage;