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Add classes Fl_SVG_File_Surface and Fl_EPS_File_Surface to draw to SVG and EPS.
Test programs device and pixmap_browser use these new classes. Class Fl_SVG_File_Surface can be optionally made non functional using the --disable-svg configure option or turning off OPTION_USE_SVG in CMake. Class Fl_EPS_File_Surface can be optionally made non functional using the --disable-print configure option or turning off OPTION_PRINT_SUPPORT in CMake.
This commit is contained in:
ManoloFLTK
+58
-1
@@ -3,7 +3,7 @@
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//
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// Support for graphics output to PostScript file for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 2010-2019 by Bill Spitzak and others.
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// Copyright 2010-2020 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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@@ -206,6 +206,11 @@ public:
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// ---
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Fl_Bitmask create_bitmask(int w, int h, const uchar *array) { return 0L; }
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virtual int has_feature(driver_feature feature_mask) { return feature_mask & PRINTER; }
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int start_eps(int width, int height);
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void ps_origin(int x, int y);
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void ps_translate(int, int);
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void ps_untranslate();
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};
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/**
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@@ -310,6 +315,58 @@ public:
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static const char *file_chooser_title;
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};
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/** Encapsulated PostScript drawing surface.
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This drawing surface allows to store any FLTK graphics in vectorial form in an "Encapsulated PostScript" file.
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\n Usage example:
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\code
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Fl_Window *win = ...// Window to draw to an .eps file
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int ww = win->decorated_w();
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int wh = win->decorated_h();
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FILE *eps = fl_fopen("/path/to/mywindow.eps", "w");
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if (eps) {
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Fl_EPS_File_Surface *surface = new Fl_EPS_File_Surface(ww, wh, eps, win->color());
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Fl_Surface_Device::push_current(surface);
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surface->draw_decorated_window(win);
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Fl_Surface_Device::pop_current();
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delete surface; // the .eps file is not complete until the destructor was run
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fclose(eps);
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}
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\endcode
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*/
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class FL_EXPORT Fl_EPS_File_Surface : public Fl_Widget_Surface {
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private:
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void complete_();
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protected:
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/** Returns the PostScript driver of this drawing surface. */
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inline Fl_PostScript_Graphics_Driver *driver() { return (Fl_PostScript_Graphics_Driver*)Fl_Surface_Device::driver(); }
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public:
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/**
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Constructor.
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\param width,height Width and height of the EPS drawing area
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\param eps A writable FILE pointer where the Encapsulated PostScript data will be sent
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\param background Color expected to cover the background of the EPS drawing area.
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This parameter affects only the drawing of transparent Fl_RGB_Image objects:
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transparent areas of RGB images are blended with the \p background color.
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*/
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Fl_EPS_File_Surface(int width, int height, FILE *eps, Fl_Color background = FL_WHITE);
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/**
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Destructor.
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The underlying FILE pointer remains open after destruction of the Fl_EPS_File_Surface object
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unless close() was called.
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*/
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~Fl_EPS_File_Surface();
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virtual int printable_rect(int *w, int *h);
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/** Returns the underlying FILE pointer */
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FILE *file() { return driver()->output; }
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virtual void origin(int x, int y);
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virtual void origin(int *px, int *py);
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virtual void translate(int x, int y);
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virtual void untranslate();
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/** Closes using fclose() the underlying FILE pointer.
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The only operation possible with the Fl_EPS_File_Surface object after calling close() is its destruction. */
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int close();
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};
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#endif // Fl_PostScript_H
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//
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@@ -0,0 +1,73 @@
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//
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// Declaration of Fl_SVG_File_Surface in the Fast Light Tool Kit (FLTK).
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//
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// Copyright 2020 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 report all bugs and problems on the following page:
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//
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// https://www.fltk.org/str.php
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//
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#ifndef Fl_SVG_File_Surface_H
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#define Fl_SVG_File_Surface_H
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#include <FL/Fl_Widget_Surface.H>
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#include <stdio.h>
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/** A drawing surface producing a Scalable Vector Graphics (SVG) file.
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This drawing surface allows to store any FLTK graphics in vectorial form in a "Scalable Vector Graphics" file.
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\n Usage example:
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\code
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Fl_Window *win = ...// Window to draw to a .svg file
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int ww = win->decorated_w();
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int wh = win->decorated_h();
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FILE *svg = fl_fopen("/path/to/mywindow.svg", "w");
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if (svg) {
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Fl_SVG_File_Surface *surface = new Fl_SVG_File_Surface(ww, wh, svg);
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Fl_Surface_Device::push_current(surface);
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fl_color(FL_WHITE);
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fl_rectf(0, 0, ww, wh);
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surface->draw_decorated_window(win);
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Fl_Surface_Device::pop_current();
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delete surface; // the .svg file is not complete until the destructor was run
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fclose(svg);
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}
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\endcode
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\note FLTK uses the PNG and JPEG libraries to encode images to the SVG format. If JPEG is
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not available at application build time, PNG is enough (but produces a quite larger output).
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If PNG isn't available either, images don't appear in the SVG output.
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*/
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class FL_EXPORT Fl_SVG_File_Surface : public Fl_Widget_Surface {
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int width_, height_;
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public:
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/**
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Constructor of the SVG drawing surface.
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\param width,height Width and height of the graphics area in FLTK drawing units
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\param svg A writable FILE pointer where the SVG data are to be sent. The resulting SVG data are not complete until after destruction of the Fl_SVG_File_Surface object or after calling close().
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*/
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Fl_SVG_File_Surface(int width, int height, FILE *svg);
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/**
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Destructor.
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The underlying FILE pointer remains open after destruction of the Fl_SVG_File_Surface object
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unless close() was called.
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*/
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~Fl_SVG_File_Surface();
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/** Returns the underlying FILE pointer */
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FILE *file();
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virtual void origin(int x, int y);
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virtual void translate(int x, int y);
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virtual void untranslate();
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virtual int printable_rect(int *w, int *h);
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/** Closes with function fclose() the FILE pointer where SVG data is output.
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The only operation possible after this on the Fl_SVG_File_Surface object is its destruction.
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\return The value returned by fclose(). */
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int close();
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};
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#endif /* Fl_SVG_File_Surface_H */
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