[Scummvm-tracker] [ScummVM :: Bugs] #17254: SCI: KQ6: High resolution graphics mode scales text and low-res graphics unevenly (200→440 vertical stretch)

[ScummVM :: Bugs]

#17254: SCI: KQ6: High resolution graphics mode scales text and low-res graphics
unevenly (200→440 vertical stretch)
---------------------------+-------------------------
Reporter:  dfabulich       |      Owner:  (none)
    Type:  defect          |     Status:  new
Priority:  normal          |  Component:  Engine: SCI
 Version:                  |   Keywords:
    Game:  King's Quest 6  |
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 With "Enable high resolution graphics" turned on, KQ6 CD (DOS, or Windows)
 uses the Windows 256-color driver
 (`engines/sci/graphics/drivers/win256col.cpp`), which renders to a 640x440
 screen. The 320x200 low-res graphics are doubled horizontally but
 stretched by 11/5 vertically, so every fifth source row is 3 pixels tall
 instead of 2 (the `ty == 5` branch in `largeWindowRenderLine()`).

 This is most visible in text. For example, in the opening beach scene, in
 "Broken pieces of Alexander's ship litter the beach.", the "e" in "Broken"
 has a 2px-high crossbar and a 1px-high vertical stroke, while the "e" in
 "beach" is drawn correctly. Glyphs look different depending on which row
 they land on.

 The original Windows interpreter has the same artifact, and #12069 already
 aligned ScummVM's row mapping with the original. So this is faithful, but
 it's unpleasant.
-- 
Ticket URL: <https://bugs.scummvm.org/ticket/17254>
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