Correct PDF palette size when saving

radarhere · radarhere · commit 98b73009cc92 · 2023-11-16T23:01:26.000+11:00
diff --git a/src/PIL/PdfImagePlugin.py b/src/PIL/PdfImagePlugin.py
@@ -96,7 +96,7 @@ def _write_image(im, filename, existing_pdf, image_refs):
         dict_obj["ColorSpace"] = [
             PdfParser.PdfName("Indexed"),
             PdfParser.PdfName("DeviceRGB"),
-            255,
+            len(palette) // 3 - 1,
             PdfParser.PdfBinary(palette),
         ]
         procset = "ImageI"  # indexed color

Original file line number	Diff line number	Diff line change
`@@ -96,7 +96,7 @@ def _write_image(im, filename, existing_pdf, image_refs):`
`96`	`96`	`dict_obj["ColorSpace"] = [`
`97`	`97`	`PdfParser.PdfName("Indexed"),`
`98`	`98`	`PdfParser.PdfName("DeviceRGB"),`
`99`		`- 255,`
	`99`	`+ len(palette) // 3 - 1,`
`100`	`100`	`PdfParser.PdfBinary(palette),`
`101`	`101`	`]`
`102`	`102`	`procset = "ImageI" # indexed color`