tree 97bea03343fdf9ed4b47afbf57caee798daad354
parent 899ff64f22bb2c0b490fbf9902857192c03865e8
author Lei Zhang <thestig@chromium.org> 1704251318 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1704251318 +0000

Fix Skia + EMF rendering for transparencies

Reapply part of https://pdfium-review.googlesource.com/111431 that
was reverted in https://pdfium-review.googlesource.com/112371 by
splitting CPDF_RenderContext::GetBackground() into two. One is
GetBackgroundToBitmap(), which is called bt CPDF_DeviceBuffer. This
keeps the performance issue in https://crbug.com/1489537 from
regressing. The other is GetBackgroundToDevice(), which is used in
CPDF_ScaledRenderBuffer to render correctly. CPDF_ScaledRenderBuffer
uses CFX_DefaultRenderDevice and not CFX_WindowsRenderDevice, so there
is no speed issues here.

Bug: chromium:1510316
Change-Id: I540ea8f6ef6dac38053b30e3d290d4acdb02a52e
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/115010
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>