gl_shader_decompiler: Fix SetOutputAttributeToRegister empty check.

 CMakeLists: Change MSVC14 variable to MSVC_VERSION

Stub UpdateUserPresence

gl_shader_decompiler: Fix GLSL compiler error with KIL instruction.

Needed for Retro City Rampage to go in game

Several Friend service fixes

core: Namespace EmuWindow

gl_rasterizer: Silence implicit truncation warning in SetupShaders()

GPU/Maxwell3D: Implemented an alternative set of blend factors.

RasterizerGL: Ignore invalid/unset vertex attributes.

These are used by nouveau and some games like SMO.

- Used by Go Vacation

This should make the es2gears example not crash anymore.

- Used by Splatoon 2.

Previously this would warn of truncating a std::size_t to a u32. This is
safe because we'll obviously never have more than UINT32_MAX amount of
uniform buffers.

Gets the class out of the global namespace.

gl_shader_decompiler: Improve handling of unknown input/output attributes.

Implement render target formats RGBA8_SNORM and RG8_SNORM.

The rest of the CMake script uses lowercase for commands (which is the
general CMake style), making it more consistent with surrounding code.

Use of the MSVC14 variable is discouraged in the CMake documentation
(which makes sense, since MSVC_VERSION is the more general appliable
variable).

loader: Add more descriptive errors

GPU/Shader: Implemented SSY and SYNC as a set_target/jump pair.

- Used by Super Mario Odyssey.

- Used by Super Mario Odyssey.

SSY sets the target label to jump to when the SYNC instruction is executed.

video_core: Get rid of global variable g_toggle_framelimit_enabled

video_core: Use variable template variants of type_traits interfaces where applicable

Implement R16S & R16UI & R16I RenderTargetFormats & PixelFormats and more (R16_UNORM needed by Fate Extella) (#848)

* Implement R16S & R16UI & R16I RenderTargetFormats & PixelFormats


Do a separate function in order to get Bytes Per Pixel of DepthFormat


Apply the new function in gpu.h


delete unneeded white space

* correct merging error

qt/gamelist: Minor cleanup-related changes

Instead, we make a struct for renderer settings and allow the renderer
to update all of these settings, getting rid of the need for
global-scoped variables.

This also uncovered a few indirect inclusions for certain headers, which
this commit also fixes.

This is entirely unused and can be removed.

Currently we only have an OpenGL renderer, so this is unused in code
(and occupies the Renderer identifier in the VideoCore namespace).

Silences a warning about truncating from size_t to u32

We don't need to use a heap-allocated std::vector here, given we
explicitly know the bounds.