mesa: create, use new _mesa_texture_base_format() function

Reviewed-by: Eric Anholt <[email protected]>

3 files changed, 18 insertions, 1 deletions

diff --git a/src/mesa/main/ff_fragment_shader.cpp b/src/mesa/main/ff_fragment_shader.cpp
index bc6fdbdd891..c6828925f5e 100644
--- a/src/mesa/main/ff_fragment_shader.cpp
+++ b/src/mesa/main/ff_fragment_shader.cpp
@@ -418,7 +418,7 @@ static GLuint make_state_key( struct gl_context *ctx,  struct state_key *key )
          continue;
 
       samp = _mesa_get_samplerobj(ctx, i);
-      format = texObj->Image[0][texObj->BaseLevel]->_BaseFormat;
+      format = _mesa_texture_base_format(texObj);
 
       key->unit[i].enabled = 1;
       key->enabled_units |= (1<<i);
diff --git a/src/mesa/main/texobj.c b/src/mesa/main/texobj.c
index f0ff605fc50..d199bd7fdb5 100644
--- a/src/mesa/main/texobj.c
+++ b/src/mesa/main/texobj.c
@@ -954,6 +954,20 @@ _mesa_total_texture_memory(struct gl_context *ctx)
 }
 
 
+/**
+ * Return the base format for the given texture object by looking
+ * at the base texture image.
+ * \return base format (such as GL_RGBA) or GL_NONE if it can't be determined
+ */
+GLenum
+_mesa_texture_base_format(const struct gl_texture_object *texObj)
+{
+   const struct gl_texture_image *texImage = _mesa_base_tex_image(texObj);
+
+   return texImage ? texImage->_BaseFormat : GL_NONE;
+}
+
+
 static struct gl_texture_object *
 invalidate_tex_image_error_check(struct gl_context *ctx, GLuint texture,
                                  GLint level, const char *name)
diff --git a/src/mesa/main/texobj.h b/src/mesa/main/texobj.h
index efcd7661e26..f33991dd2d6 100644
--- a/src/mesa/main/texobj.h
+++ b/src/mesa/main/texobj.h
@@ -165,6 +165,9 @@ _mesa_get_fallback_texture(struct gl_context *ctx, gl_texture_index tex);
 extern GLuint
 _mesa_total_texture_memory(struct gl_context *ctx);
 
+extern GLenum
+_mesa_texture_base_format(const struct gl_texture_object *texObj);
+
 extern void
 _mesa_unlock_context_textures( struct gl_context *ctx );