This definition was introduced in svn r6657 (STR #2147) but never used.
The new driver model in FLTK 1.4 makes it (the intention described in
STR #2147) even more obsolete.
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instead of the deprecated Fl_Surface_Device::set_current().
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This update ought to work with
fltk-config [--use-images] [--use-gl] --compile <c source file>
on both Windows and Unix/Linux when built with CMake. It was tested
under Windows and Linux using fltk-config directly from the build tree,
but it should work as well after installation.
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Several other platform-independent source files (e.g., Fl_Browser.cxx, Fl_Group.cxx) use malloc/realloc/free without
including a special header file for the Windows platform. Thus, Fl_Table.cxx can just be likewise.
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These were introduced at r12647, that is, during development of the 1.4 API.
These functions provided windowless support only on the MacOS platform,
where this can be obtained without those functions.
Windowless support on other platforms would require changing the event
loop. There's no evidence from STR's there's a demand for windowless mode
on other platforms.
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It's also necessary to prevent FLTK from rescaling windows moved between screens with different DPI's.
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FLTK reads during fl_open_display() the scaling factor of each screen and uses that to transform
FLTK units into screen units. This change avoids this reading if the app declared to be DPI-aware
though a manifest, a symptom that the app supports HighDPI independently from FLTK.
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This makes 'fltk-config --compile' work with simple test applications
like hello.cxx etc.
It may not yet work with other options though, particularly with
--use-gl or --use-images, but it's an improvement.
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This became unused when window scaling no longer involved window destruction/recreation.
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Most other platform-dependent types of FL/platform_types.h are also documented.
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Also, for Fl::run_also_windowless() and Fl::wait_also_windowless(), mention that
MacOS is a platform supporting the windowless mode and what happens with
platforms that don't support it.
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Some debug messages are included, but currently disabled.
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Replace compiler/preprocessor/platform macro "WIN32" with "_WIN32".
Replace "WIN32" in text and documentation with "Windows".
Replace "MSWindows" with "Windows".
To do: README.Windows.txt (and maybe other documentation as well)
needs updates.
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This commit also simplifies the platform-dependent support of fl_read_image():
only Fl_XXX_Screen_Driver::read_win_rectangle() contains platform-specific
code to capture pixels from the current window or from an offscreen buffer.
Platform-independent function Fl_Screen_Driver::traverse_to_gl_subwindows()
captures subwindows that intersect with the area fl_read_image() targets.
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Because these functions are related to Fl_Screen_Driver::wait(double)
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