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add DlCanvas(SkCanvas) vs DlCanvas(Builder) variants to DL rendertests #39944
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| static const CvSetup kEmptyCvSetup = [](SkCanvas*, SkPaint&) {}; | ||
| static const CvRenderer kEmptyCvRenderer = [](SkCanvas*, const SkPaint&) {}; | ||
| static const DlRenderer kEmptyDlRenderer = [](DisplayListBuilder&) {}; | ||
| typedef const std::function<void(SkCanvas*, SkPaint&)> SkSetup; |
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I realize this was just renaming existing stuff, but prefer using to typedef. It usually doesn't matter except you need to use using if you need template parameters. So its better (IMO) to be consistent and it seems to be the C++ way.
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…rations (flutter#39944) add DlCanvas(SkCanvas) vs DlCanvas(Builder) variants to DL rendertests
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Just a note that this PR may have a slight negative impact on the "display list builder" benchmarks as it adds a couple of new op variants to the list of DL test snippets which are used to measure the builder performance.
This PR adds new testing variants to the display_list_rendertests test suite. Previously we tested that the following graphics flows produced the same results graphically:
DisplayListBuilder rendering, dispatched to an SkCanvas(replaced by # 6 below)SkCanvas rendering captured into a DL(no longer represents an active Flutter work-flow)# 2(now from # 6 below) that were recorded at 1x, rendered at 2xThe new rendering variations that are now added to the above are:
DL produced by # 4 identical to DL produced by # 6(# 4 no longer produces a DL so no pair of DL's to compare)Note that when all of the steps 1-7 were in place some bugs were discovered in
DlSkCanvasAdapternot synchronizing all attributes and the image variants ofDLOpnot doing precise comparisons.This PR is a draft because now that we are testing that all of the above agree with each other, some of the comparisons may be eliminated as obsolete. In particular, # 2 (replaced by # 6) and # 3. # 4's DL replaced by # 7's DL if # 2 is eliminated.(All adjustments to removing the old steps and replacing them with the new steps have been implemented so this PR is moving from draft status to ready for review.)