Add *broken* delta info

lib/python/qmk/painter.py

@@ -115,6 +115,25 @@ def _render_image_metadata(metadata):
  f"// Delta: {_render_values(metadata, 'delta')}",
  ])
 
+ deltas = []
+ for i, v in enumerate(metadata):
+ # Not a delta frame, go to next one
+ if not v["delta"]:
+ continue
+
+ # Unpack rect's coords
+ l, t, r, b = v["delta_rect"]
+
+ delta_px = (r - l) * (b - t)
+ px = size["width"] * size["height"]
+
+ # FIXME: May need need more chars here too
+ deltas.append(f"// Frame {i:3d}: ({l:3d}, {t:3d}) - ({r:3d}, {b:3d}) >> {delta_px:4d}/{px:4d} pixels ({100*delta_px/px:.2f}%)")
+
+ if deltas:
+ lines.append("// Areas on delta frames")
+ lines.extend(deltas)
+
  return "\n".join(lines)
 
 
@@ -192,7 +211,6 @@ def render_header(subs):
 
 source_file_template = """\
 ${license}
-
 ${metadata}
 
 #include <qp.h>

lib/python/qmk/painter_qgf.py

@@ -382,11 +382,19 @@ def rgb888_to_qmk_hsv888(e):
  delta_descriptor.write(fp)
 
  # Add metadata, showed later in a comment in the generated file
- metadata.append({
+ frame_metadata = {
  "compression": frame_descriptor.compression,
  "delta": frame_descriptor.is_delta,
  "delay": frame_descriptor.delay,
- })
+ }
+ if frame_metadata["delta"]:
+ frame_metadata.update({"delta_rect": [
+ delta_descriptor.left,
+ delta_descriptor.top,
+ delta_descriptor.right,
+ delta_descriptor.bottom,
+ ]})
+ metadata.append(frame_metadata)
 
  # Write out the data for this frame to the output
  data_descriptor = QGFFrameDataDescriptorV1()