Instead of using a negative height in the viewport, invert the Y direction
at the vertex shader. This is a little more readable as a negative height
is hacky.
This is a preparation for DirectX 12. DirectX 12's coodination system
is very similar to Metal, but doesn't treat a negative height in its
viewport unfortunately.
Updates #1007
Note that this applies only to the builtin shaders - interface for Kage stays
unchanged for compatibility.
Minor compatibility delta: when interpolating alpha values, previous code has
created nonsense values, such as, when interpolating from
fully-transparent-black (0,0,0,0) to opaque-white (1,1,1,1), something like
half-transparent-grey (0.25,0.25,0.25,0.5) where half-transparent-white
(0.5,0.5,0.5,0.5) is used by the new code.
I assume this is a strict improvement, however this may warrant some testing.
Possible later improvement could be moving the premultiplication from fragment
shader to CPU. Did not do this as it makes the code rather inconsistent of Kage
vs built-in shader usage.
Updates #1772
Unfortunately, there are several issues in RunOnMainThread:
* RunOnMainThread cannot be portable: It is impossible to implement this
correctly on mobiles.
* RunOnMainThread doesn't make sense on mobiles: the rendering works on
a different thread (goroutine) on mobiles.
* RunOnMainThread can cause deadlocks very easily.
Until we find a better solution, let's remove this.
Closes#1945
This allows a new state to disallow resizing the window but allow
making the window fullscreen on macOS by a user.
This change adds the new type WindowResizingModeType. There are
these constants of this type:
* WindowResizingModeDisabled
* WindowResizingModeOnlyFullscreenEnabled
* WindowResizingModeEnabled
Closes#1819
Unfortunately, it is almost impossible to provide a consistent behavior
to keep the aspect ratio of the window on Windows. Instead of having an
incomplete API, let's remove this.
Closes#1988
Now I couldn't see the issue. Probably the implementation of
internal/graphicsdriver/metal has changed since the last fix, but
I am not sure.
Updates #1740Closes#1954
Shrinking a window size by a cursor sometimes makes a smaller window
than 126px. To avoid such flaky behavior, do not set the limitation of
the minimum window width.
On Linux/UNIX, there should not be reasons to limit the window width.
Updates #165
