st/mesa: fix texture array dimensions

For 1D/2D texture arrays use the pipe_resource::array_size field.
In OpenGL 1D arrays texture use the height dimension as the array
size and 2D array textures use the depth dimension as the array size.
Gallium uses a special array_size field instead.  When setting up
gallium textures or comparing Mesa textures to gallium textures we
need to be extra careful that we're comparing the right fields.

The new st_gl_texture_dims_to_pipe_dims() function maps OpenGL
texture dimensions to gallium texture dimensions and simplifies
this quite a bit.

1 files changed, 14 insertions, 1 deletions

diff --git a/src/mesa/state_tracker/st_texture.h b/src/mesa/state_tracker/st_texture.h
index 5eae7ab729..d50c3c9af7 100644
--- a/src/mesa/state_tracker/st_texture.h
+++ b/src/mesa/state_tracker/st_texture.h
@@ -71,7 +71,10 @@ struct st_texture_object
     */
    GLuint lastLevel;
 
-   /** The size of the level=0 mipmap image */
+   /** The size of the level=0 mipmap image.
+    * Note that the number of 1D array layers will be in height0 and the
+    * number of 2D array layers will be in depth0, as in GL.
+    */
    GLuint width0, height0, depth0;
 
    /* On validation any active images held in main memory or in other
@@ -172,6 +175,16 @@ st_texture_create(struct st_context *st,
                   GLuint tex_usage );
 
 
+extern void
+st_gl_texture_dims_to_pipe_dims(GLenum texture,
+                                GLuint widthIn,
+                                GLuint heightIn,
+                                GLuint depthIn,
+                                GLuint *widthOut,
+                                GLuint *heightOut,
+                                GLuint *depthOut,
+                                GLuint *layersOut);
+
 /* Check if an image fits into an existing texture object.
  */
 extern GLboolean