SDL_DisplayMode now includes the pixel size, the screen size and the relationship between the two. For example, a 4K display at 200% scale could have a pixel size of 3840x2160, a screen size of 1920x1080, and a display scale of 2.0.
* SDL 3.0 is going to be high DPI aware and officially separates screen coordinates from client pixel area
The public APIs to disable high DPI support have been removed
Work in progress on https://github.com/libsdl-org/SDL/issues/7134
Fixes DPI awareness of testdrawchessboard (previously, the surface was
being created in points instead of pixels, resulting in the demo app
only drawing in a corner of the screen on High-DPI displays)
*_CreateWindowFramebuffer()/*_UpdateWindowFramebuffer(): are updated
to use SDL_GetWindowSizeInPixels instead of SDL_GetWindowSize() or
window->w/window->h.
Most of the _CreateWindowFramebuffer backends are untested except
for Windows.
Fixes#7047
This fixes the clang warning "Cast between pointer-to-function and pointer-to-object is an extension"
You can define SDL_FUNCTION_POINTER_IS_VOID_POINTER in your project to restore the previous behavior.
Fixes https://github.com/libsdl-org/SDL/issues/2866
Feedback from @icculus:
"IsTablet" uses "is" as a form of "to be" ...like, the actual question is of its nature.
The rest is just a superfluous word in the question and it flows as better English with if (RectEmpty) than if (IsRectEmpty)
Fixes https://github.com/libsdl-org/SDL/issues/6932
I ran this script in the include directory:
```sh
sed -i '' -e 's,#include "\(SDL.*\)",#include <SDL3/\1>,' *.h
```
I ran this script in the src directory:
```sh
for i in ../include/SDL3/SDL*.h
do hdr=$(basename $i)
if [ x"$(echo $hdr | egrep 'SDL_main|SDL_name|SDL_test|SDL_syswm|SDL_opengl|SDL_egl|SDL_vulkan')" != x ]; then
find . -type f -exec sed -i '' -e 's,#include "\('$hdr'\)",#include <SDL3/\1>,' {} \;
else
find . -type f -exec sed -i '' -e '/#include "'$hdr'"/d' {} \;
fi
done
```
Fixes https://github.com/libsdl-org/SDL/issues/6575
