presentsWithTransaction caused many troubles. The critical thing was
that nextDrawable sometimes took more than one second when a user
inputs with NSTextView.
Fortunately, applications work well even without presentsWithTransaction.
Updates #1029
Updates #1196
Updates #1745
Updates #1974
The feature level 12_0 causes some issues on some machines. As we now
have EBITENGINE_DIRECTX_FEATURE_LEVEL, let's go back to the default
feature level 11_0.
Updates #2486
A fix for #2447 was a breaking-change as the DirectX driver was no longer
available for some old graphics card.
To support such old cards, provide a new environment variable
EBITENGINE_DIRECTX_FEATURE_LEVEL to specify a feature level.
The possible values are 11_0, 11_1, 12_0, 12_1, and 12_2. The default
value is 12_0.
Closes#2466
The DirectX initialization passed but crashed later on some old machines
supporting the feature level 11 but not 12.
This change fixes the issue by changing the required feature level from
11 to 12 so that the initialization fails and OpenGL is used as the
fallback.
Closes#2447
This doesn't change the performance at the test using ColorM:
```
name old time/op new time/op delta
ColorMScale-8 1.11µs ±43% 1.23µs ±70% ~ (p=1.000 n=5+5)
```
This reverts these commits
* ccddd4ee20
* 8e40c2ce7e
* 2eb1efe3cc
Without GetCopyableFootprints, the test results on 32bit Windows seemed
much more flaky. This didn't fix the memory issue like #2294 anyway.
GetCopyableFootprints seems very conservative and returns a quite
big memory size. Instead of using the info from GetCopyableFootprints
let's use our own minimum footprint.
This change relads a part of the change to use the screen shader
instead of FilterScreen, but with the issue on iOS fixed.
Let's remove FilterScreen later.
Updates #2282
This reverts commit 9d303e8dc5.
Reason: A GPU memory leak (#2292). Though this reverting reveals the error #2249
again, a memory leak is more critical. Then revert the change once, and then
take time to investigate how to resolve#2249.
Closes#2292
Updates #2249
This reverts these commits
* 3259ef3daf
* 7c55065490
* 5bb70f485e
Reason: iOS crash. Probably we have to prepare a special rendering
pipeline for the final screen.
Closes#2278
CreateGraphicsPipelineState someitmes causes an error
DXGI_ERROR_DEVICE_HUNG, but we failed to know why.
Instead of fixing this, check the error earlier and use the fallback
grpahics library OpenGL in this case.
Updates #2198
