tree 81884f431d52168abc128473435efe19485b19bc
parent e9ca3df9cdef0bf2365cf50b88fcc23b7bf44104
author Alan Screen <awscreen@chromium.org> 1710198428 +0000
committer Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1710198428 +0000

M123: Add tests for OOPPD GDI metafile variations

Windows print drivers for which the browser does a PDF conversion to a
form other than regular EMF have been found to cause blank pages when
the out-of-process print drivers feature is enabled.  This is due to
the Print Backend service treating all GDI jobs as one single type of
EMF object, which is problematic since PostScript is handled with a
different EMF playback method at printing time.

Gain coverage for this scenario by extending the browser tests based on
SystemAccessProcessSandboxedServicePrintBrowserTest to include the
Windows printer language type in the test parameterization.

Update the TestPrintingContext logic to support specifying the language
type that the faked printer driver is supposed to expect.  This allows
for adding a check that provided page metafile data matches the
expectation.

To communicate this expected type to the Print Backend service, the
necessary additional mojom MetafileDataType must be included as part of
adding these tests.  To show the current problematic behavior, the
PrintBackendServiceImpl still creates the same EMF metafile object for
this new type.

Together these changes show that the metafile objects created for
PostScript and text-only print drivers are incorrectly handled by the
Print Backend service, so that the playback of such objects will not
provide imaging as desired.

(cherry picked from commit a8bc2d1f87a7b3e5a911923a7233714c084d0caa)

Bug: 41492268
Change-Id: Icca0a89c1a9cde102f4ec04874470536468c5cc6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5333336
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Alan Screen <awscreen@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#1268739}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5361239
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/branch-heads/6312@{#536}
Cr-Branched-From: 6711dcdae48edaf98cbc6964f90fac85b7d9986e-refs/heads/main@{#1262506}