1 files changed, 13 insertions, 0 deletions
diff --git a/src/mesa/swrast/s_texture.c b/src/mesa/swrast/s_texture.c
index 14ee0ebc600..1dcb08c0a1b 100644
--- a/src/mesa/swrast/s_texture.c
+++ b/src/mesa/swrast/s_texture.c
@@ -85,6 +85,19 @@ _swrast_alloc_texture_image_buffer(struct gl_context *ctx,
    else
       swImg->_IsPowerOfTwo = GL_FALSE;
 
+   /* Compute Width/Height/DepthScale for mipmap lod computation */
+   if (texImage->TexObject->Target == GL_TEXTURE_RECTANGLE_NV) {
+      /* scale = 1.0 since texture coords directly map to texels */
+      swImg->WidthScale = 1.0;
+      swImg->HeightScale = 1.0;
+      swImg->DepthScale = 1.0;
+   }
+   else {
+      swImg->WidthScale = (GLfloat) texImage->Width;
+      swImg->HeightScale = (GLfloat) texImage->Height;
+      swImg->DepthScale = (GLfloat) texImage->Depth;
+   }
+
    return texImage->Data != NULL;
 }