Readability-only change.
Clarifies that these variables will be initialised before they get
accessed in the loop.
Also, initialise update_left and update_right to true, and only clear the
one needed for given triangle.
longcurrent_color is assigned per vertex, but it is not saved on each
vertex on creation (unlike their "color" attribute, used when lighting
is enabled).
As a consequence, and because rendering happens asynchronously (rather,
following the draw call queue managed by zdirtyrect.cpp when requested
to flip current buffer), longcurrent_color at clipping time can be
different to the one at vertex declaration time, causing color artifacts.
The effect is most noticeable in EMI set shi, in the grog dispenser +
shipyard manager closeup angle, when Guybrush exits the screen by
crossing its right border: dark triangles become visible on his face.
Instead, always use the color attribute, which is already properly
initialised on vertex creation.
The code was only interpolating color (in TGL_SMOOTH mode) when clipping
faces, extend it to lines.
Also, factorise color interpolation code.
No visual difference is expected in normal use, but it fixes wireframe
rendering when used for debugging.
Since Resource::makeStream returns a MemoryReadStream which will
not attempt to free the resource memory, it is fine to always
dispose those streams and get rid of the separate resourceStream
property, which was a holdover from some past WIP resource design
which no longer exists.
makeSOLStream was leaking the SeekableSubReadStream object it
creates itself if it was not called with DisposeAfterUse::YES. That
substream is an implementation detail which should not rely on
the caller to be destroyed.
Since these later SCI32 games weren't really designed to work with
subtitles-only message mode, if this doesn't work consistently or
breaks the games a lot in other places, the subtitles-only message
type could possibly be implemented in some other way, like by
messing with the game's speech volume global instead.
Simei Yin
Paul Gilbert
Vincent Pelletier
Bastien Bouclet
Colin Snover
Thierry Crozat
Eugene Sandulenko