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Add USE_DRAW_POLYGON_FALLBACK build option for testing.

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This new option, when enabled, forces the in-tree front ends
(Emcscripten, GTK, NestedVM, OS X, and Windows) to use the recently
introduced draw_polygon_fallback() in place of their native
draw_poly(). This will enable easy testing of this function in the
future.

This new option is off by default. To enable it, run CMake as:

$ cmake -DUSE_DRAW_POLYGON_FALLBACK=on

Note that I did _not_ update the Postscript frontend (ps.c) to use
this new option, as I don't think draw_polygon_fallback() would work
at all in Postscript, where the drawing units are no longer guaranteed
to be pixels. The envisioned use case for this option is a developer
testing changes to this function for sanity and/or performance, which
I only foresee happening on a standard GUI front end.
This commit is contained in:
Franklin Wei
2024-08-14 17:53:41 -04:00
committed by Simon Tatham
parent 989df5d2bf
commit a8b544d2aa
6 changed files with 25 additions and 0 deletions
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5
cmake/setup.cmake
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@ -9,6 +9,11 @@ set(build_icons FALSE)
set(need_c_icons FALSE)
option(BUILD_SDL_PROGRAMS "build test programs requiring SDL" FALSE)
option(USE_DRAW_POLYGON_FALLBACK "force frontend to use fallback software polygon rasterizer" off)
if(USE_DRAW_POLYGON_FALLBACK)
add_compile_definitions(USE_DRAW_POLYGON_FALLBACK)
endif()
# Don't disable assertions, even in release mode. Our assertions
# generally aren't expensive and protect against more annoying crashes
# and memory corruption.