Corresponds to STR #3320
1) HiDPI support consists in detecting the adequate scaling factor for the screen on which
FLTK maps a window, and scaling all FLTK units by this factor. FLTK tries to detect the correct
value of this factor at startup (see more details below). Environment variable
FLTK_SCALING_FACTOR can also be used to set this value.
2) Rescaling support consists in changing the scaling factor of all FLTK windows
in reply to ctrl/+/-/0/ keystrokes.
More details for the various platforms :
- X11: Support is very advanced. Some details need still to be improved.
Automatic detection of the correct starting value of the scaling factor works well
with the gnome desktop. The present code contains no support for this on
other desktops. FLTK_SCALING_FACTOR provides a workaround.
-WIN32: Support is incomplete at this point, although many test
applications have partial or complete HiDPI and scaling support.
The current value of the system's scaling factor is correctly detected
at application startup. Apps respond to changes of this value in real time.
Support needs to define the FLTK_HIDPI_SUPPORT preprocessor variable
at compile time. This way, standard builds produce a code with the
default WIN32 HiDPI support, that is, where all graphics goes to an internal
buffer that gets enlarged by the system and then mapped to the HiDPI
display. To experiment with (or develop) the new HiDPI support requires
a modified build procedure in which FLTK_HIDPI_SUPPORT is defined
at compile time. When the support will be complete, the requirement for the
definition of this preprocessor variable will be removed. The present commit
contains support for a single scaling factor. Eventually, per-screen scaling
factors should be implemented, as done for X11.
- MacOS: this commit does not give new HiDPI for this platform.
Eventually, window rescaling in reply to command/+/-/0/ is desirable.
Per-screen scaling factor makes no sense on this platform because
the OS itself takes care of the difference between the resolutions of
traditional and retina displays.
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12239 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
It is necessary to have a stack of the fl_begin_offscreen() calls, so that nested
such calls apply fl_end_offscreen() to the matching fl_begin_offscreen().
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11289 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
- change image caching variable types to uintptr_t
- added driver function to uncache image data
- cleaning up (Xlib and GDI will likely throw syntax errors. Trying to fix ASAP)
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11138 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
and whether we are printing: virtual int Fl_Graphics_Driver::has_feature(driver_feature feature)
This is also because it is not convenient to derive a printer-specific driver with its own
implementation of virtual functions when this implementation differs only in one line of code.
2) Solved the problem of inclusion of non public header by the public header FL/Fl_Device.H:
bracket this with #if FL_LIBRARY / #endif so this non public header is included only when building
FLTK itself.
3) Removed several (but not all) of the FLTK_ABI_VERSION guards that are no longer
useful for code targeting FLTK 1.4.
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11063 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
Configure and CMake now both check if X11/Xregion.h exists on the
build system and set HAVE_X11_XREGION_H in config.h accordingly.
src/Fl_Pixmap.cxx: modified to use the configure test as proposed by Manolo
in fltk.coredev on Dec 13 2015 in thread "Using X11 backend on OS X".
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10983 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
STR title: (Re-)drawing artefacts with scheme plastic after STR 3059.
It turned out that drawing a pixmap could enlarge the clip region if the
intersection of the clip region and the pixmap was not a single rectangle.
Hence drawing the background pixmap would draw outside the clip region
and leave artefacts when a widget was drawn on top of it. See STR #3206.
Thanks to Manolo who had the idea and provided a patch to draw into
the individual rectangles of a multi-rectangle clip region.
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10771 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
Shorter implementation based on Fl_Graphics_Driver::draw_scaled(Fl_Image *,...).
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10616 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
Useful for printing, PostScript or PDF output, or retina displays.
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10615 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
PLEASE check this is OK, I don't have access to test systems here...
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@9311 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
used for the pixmap background, and treats this color as transparent. FLTK assigns to this variable
a color unused by the processed pixmap. In theory this variable should be specific to each processed
pixmap. In practice, it's very unlikely that several values are needed. A new member variable is
added to the Fl_Pixmap object to hold this value. This member is made static if FLTK_ABI_VERSION
< 10302 for ABI compatibility. The correct thing, though, is for a non-static member.
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@9308 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
with Fl_Widget::type(). Added a setter function Fl_Device::class_name(const char *).
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@8190 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
conflict with Mac OS X/gcc 3.x name clash when compiling with obj-c.
Also made them private instead of public.
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@7273 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
(1) adding Fl_Device class (and more) for device abstraction
(2) adding Fl_Pinter class (and more) for printing support.
Todo: Code cleanup, update dependencies, remove/replace test print window.
I'm looking into converting the test window popup in a global shortcut
that would pop up the print dialog now...
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@7263 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
