Per-Monitor V2 awareness mode is supported on Windows 10 1703 or above
and has window title bars correctly scaled on HighDPI screens.
Before this commit, FLTK Windows apps were "Per-Monitor-V1 DPI Aware".
FLTK apps detect at run-time whether the V2 mode is possible.
The new argument gives the window to be captured, or NULL to indicate capture
from the current offscreen.
Calling this function becomes easier because less dependent on global variables.
The procedure to set screen scaling factors becomes:
1) each screen scaling factor is set to 1
2) the OS is queried according to each platform to get screen scaling factor
values
3) The value of FLTK_SCALING_FACTOR, if present, is used to multiply
scaling factors
This function is replaced by static Fl_Window_Driver* Fl_Window_Driver::(const Fl_Window *win).
The purpose is to have class Fl_Window_Driver outside from FLTK ABI.
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The new function names begin_job() and begin_page() better match end_job() and end_page() with which
they must be used by pair.
The old names start_job() and start_page() are maintained for API compatibility with FLTK 1.3.x
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This change was previously attempted at r.12792 but the test/offscreen demo did not run well with it.
This commit fixes the problem: the global fl_window should not be changed when drawing to
an Fl_Double_Window.
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At this point, Windows FLTK apps detect HighDPI displays and rescale their GUI accordingly. They also
all reply to ctrl/+/-/0/ keystrokes to enlarge/shrink/reset their windows.
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This became unused when window scaling no longer involved window destruction/recreation.
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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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This second step replaces FL/x.H with FL/platform.H in all source files.
Dependencies have been adjusted as well.
This commit completes the replacement of FL/x.H with FL/platform.H.
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With this, most MacOS FLTK app can be scaled with command/+/-/0/ keystrokes.
A scaling problem remains, visible in test/cube, where the "Test" string is not positioned correctly.
GLUT apps can also be scaled (across platforms).
SVG images are re-rasterized after app scaling for optimal drawing.
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Note: don't use fl_getenv() in Fl_System_Driver and derived classes.
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Remove duplicated code by using local (static) string conversion functions.
This makes the code better maintainable and removes redundancies.
Rename some variables (particularly one-letter names) to more useful
names, minor code reformatting to be more compatible with the CMP.
To do: check for potential memory leaks, maybe free temporary buffers.
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Tested under Windows and Linux, but not yet used in library code.
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The default (0) is 'text' mode, non-zero is 'binary' mode on platforms
that distinguish text and binary mode.
Currently Windows is the only supported platform that needs this.
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This new function allows to write Fl_SVG_Image::fl_gzopen() in a completely platform-independent way.
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This avoids repeating the default values "Shift", "Meta", etc... for several platforms.
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This commit uses thread-specific, locale-setting functions under Linux and MSWindows-Visual Studio
They are already used by the Mac OS system driver, when possible.
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A bug was visible in test/unittests when moving between lines and rectangles.
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The effect was that the file_chooser test app did not recognize the window scaling factor.
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