We use dynarmic, so this is unued. Anything else we need will likely use Xbyak, so
this header isn't necessary any more.

This function doesn't need to take ownership of the string data being
given to it, considering all we do is append the characters to the
internal string instance.

Instead, use a string view to simply reference the string data without
any potential heap allocation.

Now anything that is a raw const char* won't need to be converted to a
std::string before appending.

Avoids constructing a std::string just to append a newline character

Avoids constructing a std::string just to append a character.

The interface of std::string already lets us append N copies of a
character to an existing string.

ShaderGen: Fixed a case where the TEXS instruction would use the same registers for the input and the output.

It will now save the coords before writing the outputs in a subscope.

Implement Pull #3528 from citra: use nvidia graphics automatically on laptops with optimus (with AMD support) (#271)

* Port 3528: use nvidia graphics automatically on laptops with optimus

* Force dedicated AMD Card for switchable Graphics

* Ran clang-format

* gl_shader_gen: Support vertical/horizontal viewport flipping.

* fixup! gl_shader_gen: Support vertical/horizontal viewport flipping.

For now only the UNORM type is supported.

TODO: The way we handle cached formats must change, framebuffer and texture formats are too different to keep them in the same place.