GLES 2.0 is a subset of OpenGL, so we allow applications to compile
against LibGL as if it fully supports GLES 2.0.
Additionally, we set the definitions to an integer value of `1` so
applications that check for availability like this...
int main() { return GL_ES_VERSION_2_0; }
...can actually compile. At least ScummVM uses this, and Mesa defines
their constants in the same way:
44b9e11ddb/include/GL/gl.h (L105)
This includes a new Thread::Blocker called SignalBlocker which blocks
until a signal of a matching type is pending. The current Blocker
implementation in the Kernel is very complicated, but cleaning it up is
a different yak for a different day.
As stated in the manual:
glDeleteTextures silently ignores 0's and names that do not
correspond to existing textures.
If we do not skip these 0 names, they end up as invalid free texture
names in our name allocator.
These enums are used to indicate byte-alignment when reading from and
to textures. The `GL_UNPACK_ROW_LENGTH` value was reimplemented to
support overriding the source data row width.
This option is already enabled when building Lagom, so let's enable it
for the main build too. We will no longer be surprised by Lagom Clang
CI builds failing while everything compiles locally.
Furthermore, the stronger `-Wsuggest-override` warning is enabled in
this commit, which enforces the use of the `override` keyword in all
classes, not just those which already have some methods marked as
`override`. This works with both GCC and Clang.
There are 443 number system objects generated, each of which held an
array of number system symbols. Of those 443 arrays, only 39 are unique.
To uniquely store these, this change moves the generated NumericSymbol
enumeration to the public LibUnicode/NumberFormat.h header with a pre-
defined set of symbols that we need. This is to ensure the generated,
unique arrays are created in a known order with known symbols. While it
is unfortunate to no longer discover these symbols at generation time,
it does allow us to ignore unwanted symbols and perform less string-to-
enumeration conversions at lookup time.
