netrender: utility function to extract information from a blend file on disk. Used to get render resolution for jobs in the web interface (lazy init).

release/scripts/io/netrender/master.py

@@ -76,6 +76,12 @@ class MRenderJob(netrender.model.RenderJob):
         self.save_path = ""
         self.files = [MRenderFile(rfile.filepath, rfile.index, rfile.start, rfile.end) for rfile in job_info.files]
         
+        self.resolution = None
+    
+    def initInfo(self):
+        if not self.resolution:
+            self.resolution = tuple(getFileInfo(self.files[0].filepath, ["bpy.context.scene.render_data.resolution_x", "bpy.context.scene.render_data.resolution_y", "bpy.context.scene.render_data.resolution_percentage"]))
+
     def save(self):
         if self.save_path:
             f = open(self.save_path + "job.txt", "w")
@@ -98,6 +104,7 @@ class MRenderJob(netrender.model.RenderJob):
                 return False
 
         self.start()
+        self.initInfo()
         return True
 
     def testFinished(self):

release/scripts/io/netrender/master_html.py

@@ -215,6 +215,17 @@ def get(handler):
         job = handler.server.getJobID(job_id)
 
         if job:
+            output("<h2>Render Information</h2>")
+
+            job.initInfo()
+            
+            startTable()
+
+            rowTable("resolution", "%ix%i at %i%%" % job.resolution)
+
+            endTable()
+
+            
             output("<h2>Files</h2>")
 
             startTable()

release/scripts/io/netrender/utils.py

@@ -173,6 +173,21 @@ def prefixPath(prefix_directory, file_path, prefix_path):
 
     return full_path
 
+def getFileInfo(filepath, infos):
+    process = subprocess.Popen([sys.argv[0], "-b", "-noaudio", filepath, "-P", __file__, "--"] + infos, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)    
+    stdout = bytes()
+    while process.poll() == None:
+        stdout += process.stdout.read(1024)
+
+    # read leftovers if needed
+    stdout += process.stdout.read()
+    
+    stdout = str(stdout, encoding="utf8")
+    
+    values = [eval(v[1:].strip()) for v in stdout.split("\n") if v.startswith("$")]
+    
+    return values
+                
 def thumbnail(filename):
     root = os.path.splitext(filename)[0]
     imagename = os.path.split(filename)[1]
@@ -197,3 +212,8 @@ def thumbnail(filename):
             pass
 
     return None
+
+if __name__ == "__main__":
+    import bpy
+    for info in sys.argv[7:]:
+        print("$", eval(info))