Game Development Reference
In-Depth Information
Figure 6-9.
Use the context menu on the image you want to compare
The “Compare Image With” Dialog
To compare images generated by a particular test with blessed images or with other images your application has
produced during conformance testing, select the thumbnail for the image in question and bring up the context menu.
Select Compare Image. You can include the blessed image in your comparison, but you cannot choose only the
blessed image; you must also select another image generated during testing, either as output from a different step, or
from a different execution, or from a different test, or from a different test procedure. Fortunately, you don't have to
remember every place you've generated a like image; the drop-down menu in the dialog shows you the options, and
you select from those. Steps are numbered 0-5; different executions are identified by date and sequence number. If
there are no valid different tests or test procedures, those choices will be disabled.
The “Image Comparison” Dialog
In this box, the images you've selected are displayed side by side. If you've included the blessed image, you'll see it on
the far left. The reference image—the one from the test you highlighted in the GUI—displays in the middle, and the
image you've chosen to compare with is on the right. Metadata about the test and the execution date and sequence
appears above. If your image is part of an animation, you can page through the frames with the arrows.
In Figure
6-10
, you can see that there's a shader problem in the tested image: the link on the left has no shading
at all.
