tree e2f5ec4e7dead7ba90ddac210a270c7b76b8c448
parent 999e21fa2424aada4189bdd89a19e0cd5779be69
author Hui Yingst <nigi@chromium.org> 1671219076 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1671219076 +0000

[Skia] Fix rendering issue for converting 1 bpp image source

This CL makes the following changes to fix the process of upsampling
non-grayscale 1 bit-per-pixel images:
- Move the process for handling 1-bpp image from
  Fill32BppDestStorageWithPalette() to a new helper function
  Fill32BppDestStorageWith1BppSource().
- For a 1 bit-per-pixel image, even if it's not a grayscale image, it
  should have only two colors. Remove the process of building a new
  palette with the size of 256 since it's not needed.
- As BuildPaletteFrom1BppSource() is no longer needed outside of
  core/fxge/dib/cfx_imagestretcher.cpp, move it into anonymous
  namespace.

Bug: chromium:1383708, chromium:1400882
Change-Id: I77557ed3b61b745b5ee98def5dc359ba80b8f85f
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/102610
Commit-Queue: Nigi <nigi@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>