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When scaling image down by 2, 4, 8, etc., there is no
sense in calling the bilinear scaling.
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The original code can not scale well below 50%. To improve
filtering in a fast way, huge images are scaled by powers of
two before fine scaling using the original bilinear scale.
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This creates the base for #1263, but does not fix it yet.
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- allocate a new struct 'load_stat' on the heap
- use struct load_stat to open image file (fp) and for error counters
The previous fix of #1207 unfortunately decremented volatile variables
which caused (plausible) compiler warnings by clang.
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Example:
warning: extra ‘;’ after in-class function definition [-Wextra-semi]
Also: replace 'FL_OVERRIDE' with 'override' in all modified files
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Thanks to @lanodan for most of the source code.
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- Do not change or remove the cache variable FLTK_BACKEND_WAYLAND:
this is an option set (and must only be changed) by the user.
- CMake/options.cmake: check Wayland availability if option
FLTK_BACKEND_WAYLAND is ON and set the result variable
FLTK_USE_WAYLAND accordingly.
- Replace FLTK_BACKEND_WAYLAND with FLTK_USE_WAYLAND everywhere
else, except as noted above: in options.cmake.
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The added if() statement's condition is always false in FLTK before addition to it
of class Fl_Native_Input. Therefore, the present modification is effectless unless
this new class is added to the library, either in its core or as an addon.
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1. src/Fl_add_idle.cxx: add missing parameter docs
2. FL/fl_draw.H: rename 1st parameter of fl_draw_pixmap(...) from
'data' to 'cdata'.
The 2nd warning appears to be caused by a 'friend' declaration in
FL/Fl_Graphics_Driver.H, line 98:
'friend FL_EXPORT int fl_draw_pixmap(const char*const* cdata, ...)'
This 'friend' declaration seems to "confuse" some (newer?) doxygen
versions, definitely doxygen 1.13.2.
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This turned out to be more complicated than just to delete a function
because it was used internally, and the callback signatures were a bit
flaky. I also added a lot of documentation to clarify matters.
FL/Fl.H: document idle callback signatures, make some internal
functions of class Fl private, add public Fl::idle() accessor (read-
only), add Fl::add_idle(Fl_Old_Idle_Handler cb) to enable using
old-style idle callbacks w/o 'data' argument.
FL/forms.H: replace Fl::set_idle() with Fl::add_idle().
src/Fl.cxx: rename private Fl::idle_ with trailing underscore.
src/Fl_System_Driver.cxx: use new public accessor Fl::idle() to access
Fl::idle_ which is now private.
src/Fl_add_idle.cxx: improve documentation, clarify idle callback
matching, add example code in docs, rename methods, add overloaded
Fl::add_idle(Fl_Old_Idle_Handler cb).
src/Fl_win32.cxx: use public Fl::idle() rather than private member.
src/drivers/Unix/Fl_Unix_System_Driver.cxx: same as above.
src/Fl_cocoa.mm: same as above.
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Note: it's still in branch-1.4 and in git history for reference
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Previously, the DPI value was completely random, resulting
in some interesting scaling when reading the png in other apps.
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The `memcmp` call would crash in Adress sanitizer if the memory compare
would run into an undefined buffer. `memcmp` is not guaranteed to stop
reading a buffer if a difference is found.
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and declare it in non-public header src/Fl_Scalable_Graphics_Driver.H which also
declares classes Fl_Font_Descriptor and Fl_Fontdesc.
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This commit removes the unused static method
Fl_Wayland_Window_Driver::resize_after_screen_change(void *data)
and related data as discussed in the context of PR #1248.
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When a native window is destroyed, make sure the callback to
Fl_WinAPI_Window_Driver::resize_after_screen_change() is removed.
Added by Albrecht-S:
Thanks for the original fix to Timothy Lee (@timothytylee).
src/drivers/X11/Fl_X11_Window_Driver.cxx: equivalent fix for X11
as discussed on GitHub PR #1248
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Applying MoAlyousef's PR. -erco
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Note: this file is not used in normal compilation, it can be used
to help debugging. I'm not sure if it's still helpful, but anyway...
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Fl_Group::clear() is called in Fl_Group's d'tor anyway.
Technically we don't need to remove hscrollbar and scrollbar because
they are destroyed (and thus removed from Fl_Group) before Fl_Group's
d'tor is executed but this is left for clarity and to guarantee the
order (see comment).
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If set, menu items will also call the callback when highlighting changes.
The reason is given with Fl::callback_reason(). #941
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... and Fl_Tootip::override_text() to allow users to dynamically
generate tooltips.
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For reference, see fltk.general thread started Mar 26 2025, entitled:
"Make some Fl_Tree_Item methods virtual?"
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Explain details of the mentioned 'hack' referring to and citing
parts of the original commit log.
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hidden (#1233)
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This option is no longer needed since FLTK 1.5 always requires C++11.
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In some multi-screen settings, the un-fullscreened window would leave its screen
but would not enter any screen.
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The commit has all platforms send the FL_FULLSCREEN event when a window is created fullscreen.
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... because base_dir[0] and dest_dir[0] are *signed* chars.
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Calling getenv() twice with different output vars and accessing both
later could cause "heap-use-after-free" error in some Windows versions.
The result of home_directory_name() would be unpredictable.
Found using Wine and/or MSYS2/clang/libc++ with Address Sanitizer.
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