HDR test pattern. (#113)

* Added in support for canvas (WebGL and WebGPU). Which turns out truncate the result.

Signed-off-by: Sam.Richards@taurich.org <Sam.Richards@taurich.org>

* Make sure we see a little more of the output.

Signed-off-by: Sam.Richards@taurich.org <Sam.Richards@taurich.org>

---------

Signed-off-by: Sam.Richards@taurich.org <Sam.Richards@taurich.org>

Author: richardssam

enctests/testframework/main.py

@@ -523,7 +523,7 @@ def identity_compare(source_dict, source_clip, test_ref, testname, comparisontes
             }
         else:
             result = {'success': True, 'testresult': lines[-1]}
-            for line in lines[-2:]:
+            for line in lines[-5:]:
                 if filterquery+" " not in line:
                     continue
                 line = line.split(f" {filterquery} ")[1]

hdr/README

@@ -1,3 +1,8 @@
+# Trying to test what HDR looks like in a browser, and what
+# the tonemapping looks like - https://www.itu.int/dms_pub/itu-r/opb/rep/R-REP-BT.2390-12-2025-PDF-E.pdf
+
+
+
 # Firstly we convert the test image, which should have a "Bad Image" in full rec2020 red, and a background which should be a rec709 red. I think the resulting image should be just red when tonemapped properly.
 
 ffmpeg -y -i hdr_test_chart_v3_pq.tif -c:v libx265 -crf 18 -pix_fmt yuv420p10le -c:v libx265 -crf 18 -pix_fmt yuv420p10le -x265-params " \