5438954d8c
... as discussed in fltk.coredev in thread "RFC: introduce public config header <FL/fl_config.h>", see: https://groups.google.com/g/fltkcoredev/c/xLCs1AIXMVo/m/MHZpQggzAQAJ - Rename abi-version.h to fl_config.h, rename input files, update dependencies, .gitignore, CMake, configure and Makefiles. - Include Cairo options in FL/fl_config.h - Rename FLTK_USE_CAIRO to FLTK_HAVE_CAIROEXT for consistency. - Include <FL/fl_config.h> in config.h and wherever necessary, fix include order (move FL/Fl.H to the top) and more. - Move USE_X11 to fl_config.h and rename to FLTK_USE_X11 - Do not include <config.h> in Cairo demo program which is no longer required in Cairo programs since FLTK 1.4.0
88 lines
3.0 KiB
C++
88 lines
3.0 KiB
C++
//
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// Main header file for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2021 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// https://www.fltk.org/COPYING.php
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//
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// Please see the following page on how to report bugs and issues:
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//
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// https://www.fltk.org/bugs.php
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//
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/* \file
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Handling transparently platform dependent cairo include files
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*/
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#ifndef FL_CAIRO_H
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# define FL_CAIRO_H
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# include <FL/fl_config.h> // build configuration
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# ifdef FLTK_HAVE_CAIRO
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// Cairo is currently supported for the following platforms:
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// Win32, Apple Quartz, X11
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# include <FL/Fl_Export.H>
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# include <cairo.h>
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/**
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\addtogroup group_cairo
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@{
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*/
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/**
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Contains all the necessary info on the current cairo context.
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A private internal & unique corresponding object is created to
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permit cairo context state handling while keeping it opaque.
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For internal use only.
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\note Only available when configure has the --enable-cairo or
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--enable-cairoext option or one or both of the CMake options
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OPTION_CAIRO or OPTION_CAIROEXT is set (ON)
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*/
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class FL_EXPORT Fl_Cairo_State {
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public:
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Fl_Cairo_State() : cc_(0), own_cc_(false), autolink_(false), window_(0), gc_(0) {}
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// access attributes
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cairo_t* cc() const {return cc_;} ///< Gets the current cairo context
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bool autolink() const {return autolink_;} ///< Gets the autolink option. See Fl::cairo_autolink_context(bool)
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/** Sets the current cairo context.
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\p own == \e true (the default) indicates that the cairo context \p c
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will be deleted by FLTK internally when another cc is set later.
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\p own == \e false indicates cc deletion is handled externally
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by the user program.
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*/
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void cc(cairo_t* c, bool own=true) {
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if (cc_ && own_cc_) cairo_destroy(cc_);
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cc_=c;
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if (!cc_) window_=0;
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own_cc_=own;
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}
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void autolink(bool b); ///< Sets the autolink option, only available with --enable-cairoext
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void window(void* w) {window_=w;} ///< Sets the window \p w to keep track on
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void* window() const {return window_;} ///< Gets the last window attached to a cc
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void gc(void* c) {gc_=c;} ///< Sets the gc \p c to keep track on
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void* gc() const {return gc_;} ///< Gets the last gc attached to a cc
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private:
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cairo_t * cc_; // contains the unique autoupdated cairo context
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bool own_cc_; // indicates whether we must delete the cc, useful for internal cleanup
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bool autolink_; // false by default, prevents the automatic cairo mapping on fltk windows
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// for custom cairo implementations.
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void* window_, *gc_; // for keeping track internally of last win+gc treated
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};
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/** @} */
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# endif // FLTK_HAVE_CAIRO
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#endif // FL_CAIRO_H
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