1

test.py

@@ -0,0 +1,9 @@
+import json
+with open("/tmp/map.json") as f:
+    cmap = json.load(f)
+    c = 0
+    for y in range(1080):
+        for x in range(1920):
+            if str(c) not in cmap:
+                print(f"{c=} {x=} {y=}")
+            c+=1

test1.py

@@ -0,0 +1,21 @@
+import PIL.Image
+im = PIL.Image.open("/tmp/1.png")
+im = im.convert("RGB")
+c = 0
+mapping = {}
+mapping1 = {}
+for y in range(1080):
+    for x in range(1920):
+        r, g, b = im.getpixel((x, y))
+        rc = (r << 16) + (g << 8) + b
+        #assert c == rc, f"c={c:#08x} rc={rc:#08x} {r=} {g=} {b=}"
+        assert type(rc) == int
+        mapping[rc] = c
+        mapping1[c] = rc
+        c += 1
+
+import json
+with open("/tmp/map.json", "w") as f:
+    json.dump(mapping, f)
+with open("/tmp/map1.json", "w") as f:
+    json.dump(mapping1, f)

test2.py

@@ -0,0 +1,10 @@
+import PIL.Image
+import subprocess
+im = PIL.Image.new("RGB", (1920, 1080))
+c = 0
+for y in range(1080):
+    for x in range(1920):
+        im.putpixel((x, y), (c >> 16, c >> 8 & 0xff, c & 0xff))
+        c += 1
+im.save("/tmp/1.png")
+subprocess.run(["ffplay", "-fs", "/tmp/1.png"])

test3.py

@@ -0,0 +1,15 @@
+import PIL.Image
+import subprocess
+import random
+im = PIL.Image.new("RGB", (1920, 1080))
+c = 0x000000
+color = (255, 255, 255)
+if 0:
+    if c % 256 == 0:
+        color = (random.randint(0, 256), random.randint(0, 256), random.randint(0, 256))
+for x in range(16):
+    for y in range(16):
+        im.putpixel((x+16*8*2, y+16*0), color)
+        c += 1
+im.save("/tmp/1.png")
+subprocess.run(["ffplay", "-fs", "/tmp/1.png"])