We only need to exclude actual OpenGL calls. This code doesn't
make any GL calls so threfore doe...

Fixes:

../../src/gui/sdlmain.cpp: In function ‘bool GFX_StartUpdate(uint8_t*&, int&)’:
../../sr...

Also fixes an unhandled case warning:

../../src/gui/sdlmain.cpp: In function ‘uint8_t GFX_SetSi...

Also, trying to capture the off-screen parts of the image fails with the
texture output mode on ...

When pushing, the values is already being type-cast to the correctly
sized type in the write cal...

The argument to reg_8, reg_16, and reg_32 is an
8-bit register offset.

The only variables passe...

The count and count_left do basic add and subtracts
from the CPU_Cycles, which itself is an inte...

Add support for different odd & even deinterlaced scanline
intensities.

IF the image and boot files are truncated or corrupt, these
fseek files will fail however withou...

After calling cmds.erase(...), 'it' becomes invalid
because we've erased the item to which it po...

Before this change, raw video captures of the 160x200 16-colour
Tandy/PCjr video modes were writ...

Before this change, raw image captures of the 160x200 16-colour
Tandy/PCjr video modes were writ...

The verb forms (`double_width` and `double_height`) imply actions to be
performed, and indeed, t...

Correct usage:

- double-scanned
- scan-doubled
- pixel-doubled
- width-doubled
- height-doubled...

This is preferable to inferring rendered double scanning downstream from
the video mode height p...

According to the SDL documentation, all OpenGL attributes should be set
before window creation. ...

This is a white-space only change made with "muon fmt".

Previously we ran local binaries to get the page size, however
some systems don't have them (suc...

This is needed so the pixel aspect ratios get updated in the passed down
rendered image in `aspe...

It was a bit of a mistake to include it as it's too specific, and
currently it's unused anyway.

Use the more descriptive Rect methods instead of direct coordinate
manipulations.

Error reporting is more accurate now and invalid input such as `80%blah`
and `960x720asdf` isn't...

`On` became `Auto` and `Off` became `SquarePixels`.

This is in preparation for introducing additional viewport modes.

At a logical level, that's where it belongs, next to the `aspect`
setting it's closely related t...

They're used in a rather haphazard manner all over the codebase
currently. This is a modest init...