Epoxy automatically fetches the extension functions on demand, including
the GLX context creation functions. This means that you can't test the
function pointers for NULL anymore, because they're always set to a
resolver function until the first call. Instead, you have to check for the
availability of an extension by the extension's name. Thanks to Isilkor for
catching these.
On windows, epoxy invalidates all extension function pointers when the
GL context changes. This means we need to have an active context at all
times we call an extension function (like wglGetPixelFormatAttribivARB)
or else the code will jump to an invalid pointer. On the other hand, we do
not need to make it reinitialize the pointers ourselves.
Epoxy automatically uses an alias for a function if the requested name is
not available, like glDebugMessageCallbackARB instead of
glDebugMessageCallback. It also does not have the problem with varying
parameter types for that function. So switch to it while removing
GLDEBUGPROCARB_USERPARAM_IS_CONST.
It used a mix of tabs and spaces for indentation, and tabs to separate the
columns, which doesn't work with variable tab sizes and variable column
widths. Use tabs for indentation and spaces for column separation.
The GTK and OS X platforms already ignored the requested bit depth and
always used 32 bit. Windows and SDL would set a 16 bit color depth for
the screen, but still did all of the rendering short of the final
present in 32 bit.
In windowed mode, we shouldn't stop rendering just because we have lost
focus. However, we don't need to render at full framerate; throttling to
5 fps should be sufficient. Note though that we still have to calculate
game ticks at full speed so network games don't slow down when a player
tabs out of the game.
Even though we (might) change the resolution, that doesn't result in
loss of textures because we don't recreate the OpenGL context. Therefore
we also don't have to restore their data. I believe this code is a relic
from the DirectX renderer, which would lose textures when switching away
from a fullscreen window.
When an UI element was only visible to a player (via the Player property), it still allowed ALL players to click on buttons.
I am wondering why noone else noticed that bug before. It's possible that it didn't show when the visibility was set via the menu's Target (instead of the Player property).
Maybe this was the cause of the "clicks sometimes do nothing" bug?
It isn't enough to check the top-level mesh, because attached meshes also
get a transformation from script. At least cotton branches sometimes do
that.
So check the matrix directly before using it and skip rendering.
Unlike GLX, the OpenGL function pointers are context-dependant. Because we
need an extension function to create the context we're going to use, we
first need to create a temporary context. Since this is independent of the
library used to fetch the function pointers, decouple it from glewInit().
It's not clear that the glXCreateNewContext fallback does anyone any good
because it can't create the Core Profile Context we need, but better a
fallback message followed by Shader compilation errors than an obscure
X11 protocoll error. Probably.
This bug manifested itself in mysteriously growing PropLists with nil keys.
Some usages of Clear were simply to clean the newly-allocated table, and
need to continue to do so.
It isn't clear whether that call is necessary since the C4AulScriptEngine
constructor already does this, but it is clear that duplicating the call
all over is a bad idea.
This allows the removal of quite a few return C4Void();.
Also stop pretending that Nillable<void> is the same class as Nillable<T>.
Its only function was as an implementation detail for C4Void, which doesn't
need any implementation details anymore.
This avoids duplication of code in C4AulObjectFunc and C4AulEngineFunc
at the cost of boilerplate code working around the lack of partial
function template spezializations.
Instead of ThisImpl and ExecImpl, we could have multiple C4AulEngineFunc
spezializations deriving from a common template, but that would require
even longer and duplicated boilerplate.
This allows one to use the C4Value constructor instead of
C4ValueConv. To avoid unintended implicit conversions like
const char * to bool, add a private template constructor that
catches everything not in the list of intended constructors.
Günther Brammer