Changes to fb_var_screeninfo can cause changes to
fb_fix_screeninfo. So, write back the force changes before fi is
read.
Change-Id: I721a960fa401ac5203ffc90bd3bfa2d7d0cfb292
On some devices TWRP tries to access the framebuffer before all
device nodes have been created. Retry opening instead of crashing later.
Change-Id: I189a8fe80a8906b46fb6cece53c0bf83c00c0e09
Fix: use row_bytes instead of xres (should help on Shield tablet)
Speed: Moving the calculations out of the inner loop
Change-Id: Ie43ae5e94ae88822360900c7b4d852b7aab4379b
While not all of these old build flags are active or implemented
yet (and they may not ever be implemeted until we find a device
that needs them), we need to make sure that the old build flags
are only applied when actually needed. Since there are a lot of
device trees that probably won't get updated due to lack of device
maintainers, we will rename the build flags and fix up devices on
a case by case basis.
Also added some pixel format related build flags to the make file
from AOSP so that AOSP devices should work in TWRP without
additional build flags.
Change-Id: I11ab475297d02b6aeffe89404fe50b4799a36be3
Note: events.cpp is still old code renamed to cpp to make it
easier to call functions like gr_fb_width().
I had to modify AOSP fbdev code to provide a separate memory
surface for drawing to as drawing directly to the framebuffer
resulted in rendering taking about 5 times longer.
I also modified AOSP adf code to provide a separate memory surface
for drawing for the same performance reasons. The Nexus 9 supports
adf graphics.
Overlay graphics work on at least one device. Overlay provides a
separate memory buffer already so performance is good.
I do not have a drm device yet that I know of. I made some attempt
to update the drm code to determine the correct pixel format based
on the drm graphics format, but what is available in pixel flinger
and what is available in drm do not line up all that well. Reports
are that the Pixel C is using drm graphics, but performance is
slow, likely due to the use of a mmap instead of a memory buffyer.
Change-Id: Ibd45bccca6ac2cb826037aa9b2aa5065cf683eed
