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-rw-r--r--examples/SVG_File_Surface.cxx218
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diff --git a/examples/SVG_File_Surface.cxx b/examples/SVG_File_Surface.cxx
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--- a/examples/SVG_File_Surface.cxx
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-//
-// "$Id$"
-//
-// Subclassing Fl_Surface_Device and Fl_Graphics_Driver in the Fast Light Tool Kit (FLTK).
-//
-// Copyright 2018 by Bill Spitzak and others.
-//
-// This library is free software. Distribution and use rights are outlined in
-// the file "COPYING" which should have been included with this file. If this
-// file is missing or damaged, see the license at:
-//
-// http://www.fltk.org/COPYING.php
-//
-// Please report all bugs and problems on the following page:
-//
-// http://www.fltk.org/str.php
-//
-
-// Partial, working implementation of how to draw into an SVG file using the standard
-// FLTK drawing API.
-// File hello.svg is created in the current directory.
-
-#include <FL/fl_draw.H>
-#include <stdio.h>
-#include <FL/Fl_Device.H>
-#include <FL/Fl_Graphics_Driver.H>
-#include <FL/Fl.H>
-#include <FL/Fl_Window.H>
-#include <FL/Fl_Box.H>
-
-class SVG_Graphics_Driver : public Fl_Graphics_Driver {
- FILE *out_;
- int width_;
- const char *linecap_;
- uchar red_, green_, blue_;
-public:
- SVG_Graphics_Driver(FILE*);
- ~SVG_Graphics_Driver();
- FILE* file() {return out_;}
-protected:
- const char *family_;
- const char *bold_;
- const char *style_;
- void rect(int x, int y, int w, int h);
- void rectf(int x, int y, int w, int h);
- void line_style(int style, int width, char *dashes=0);
- void line(int x1, int y1, int x2, int y2);
- void font_(int f, int s);
- void font(int f, int s);
- void draw(const char *str, int n, int x, int y);
- void draw(const char*, int, float, float) ;
- void draw(int, const char*, int, int, int) ;
- void color(uchar r, uchar g, uchar b);
- void color(Fl_Color c);
- double width(const char*, int) ;
- int height() ;
- int descent() ;
-};
-
-class SVG_File_Surface : public Fl_Surface_Device {
- int width_, height_;
-public:
- SVG_File_Surface(int width, int height, FILE*);
- int width() { return width_; }
- int height() { return height_; }
- ~SVG_File_Surface();
-};
-
-
-SVG_Graphics_Driver::SVG_Graphics_Driver(FILE *f) {
- out_ = f;
- width_ = 1;
- linecap_ = "butt";
- family_ = "";
- bold_ = "";
- style_ = "";
- red_ = green_ = blue_ = 0;
-}
-
-SVG_Graphics_Driver::~SVG_Graphics_Driver()
-{
-}
-
-void SVG_Graphics_Driver::rect(int x, int y, int w, int h) {
- fprintf(out_, "<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" "
- "fill=\"none\" stroke=\"rgb(%u,%u,%u)\" stroke-width=\"%d\"/>\n", x, y, w, h, red_, green_, blue_, width_);
-}
-
-void SVG_Graphics_Driver::rectf(int x, int y, int w, int h) {
- fprintf(out_, "<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" "
- "fill=\"rgb(%u,%u,%u)\" />\n", x, y, w, h, red_, green_, blue_);
-}
-
-void SVG_Graphics_Driver::line(int x1, int y1, int x2, int y2) {
- fprintf(out_,
- "<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" "
- "style=\"stroke:rgb(%u,%u,%u);stroke-width:%d;stroke-linecap:%s\" />\n",
- x1,y1,x2,y2, red_, green_, blue_, width_, linecap_);
-}
-
-void SVG_Graphics_Driver::font_(int ft, int s) {
- Fl_Graphics_Driver::font(ft, s);
- int famnum = ft/4;
- if (famnum == 0) family_ = "Helvetica";
- else if (famnum == 1) family_ = "Courier";
- else family_ = "Times";
- int modulo = ft % 4;
- int use_bold = modulo == 1 || modulo == 3;
- int use_italic = modulo >= 2;
- bold_ = ( use_bold ? " font-weight=\"bold\"" : "" );
- style_ = ( use_italic ? " font-style=\"italic\"" : "" );
- if (use_italic && famnum != 2) style_ = " font-style=\"oblique\"";
-}
-
-void SVG_Graphics_Driver::font(int ft, int s) {
- Fl_Display_Device::display_device()->driver()->font(ft, s);
- font_(ft, s);
-}
-
-void SVG_Graphics_Driver::line_style(int style, int width, char *dashes) {
- if (width == 0) width = 1;
- width_ = width;
- if (style & FL_CAP_SQUARE) linecap_ = "square";
- if (style & FL_CAP_ROUND) linecap_ = "round";
- else linecap_ = "butt";
-}
-
-void SVG_Graphics_Driver::draw(const char *str, int n, int x, int y) {
- // Caution: Internet Explorer ignores the xml:space="preserve" attribute
- // work-around: replace all spaces by no-break space = U+00A0 = 0xC2-0xA0 (UTF-8) before sending to IE
- fprintf(out_, "<text x=\"%d\" y=\"%d\" font-family=\"%s\"%s%s font-size=\"%d\" "
- "xml:space=\"preserve\" "
- " fill=\"rgb(%u,%u,%u)\" textLength=\"%d\">%.*s</text>\n",x, y, family_, bold_, style_, size(), red_, green_, blue_, (int)width(str, n), n, str);
-
-}
-
-void SVG_Graphics_Driver::draw(const char* str, int n, float fx, float fy) {
- return draw(str, n, (int)fx, (int)fy);
-}
-
-void SVG_Graphics_Driver::draw(int angle, const char* str, int n, int x, int y) {
- fprintf(out_, "<g transform=\"translate(%d,%d) rotate(%d)\">", x, y, -angle);
- draw(str, n, 0, 0);
- fputs("</g>\n", out_);
-}
-
-void SVG_Graphics_Driver::color(Fl_Color c) {
- Fl_Graphics_Driver::color(c);
- Fl::get_color(c, red_, green_, blue_);
-}
-
-void SVG_Graphics_Driver::color(uchar r, uchar g, uchar b) {
- red_ = r;
- green_ = g;
- blue_ = b;
-}
-
-double SVG_Graphics_Driver::width(const char* str, int l) {
- return Fl_Display_Device::display_device()->driver()->width(str, l);
-}
-
-int SVG_Graphics_Driver::height() {
- return Fl_Display_Device::display_device()->driver()->height();
-}
-
-int SVG_Graphics_Driver::descent() {
- return Fl_Display_Device::display_device()->driver()->descent();
-}
-
-SVG_File_Surface::SVG_File_Surface(int w, int h, FILE *f) : Fl_Surface_Device(NULL) {
- fprintf(f,
- "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n"
- "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \n"
- "\"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n"
- "<svg width=\"%dpx\" height=\"%dpx\" viewBox=\"0 0 %d %d\"\n"
- "xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\">\n", w, h, w, h);
- width_ = w; height_ = h;
- driver(new SVG_Graphics_Driver(f));
-}
-
-SVG_File_Surface::~SVG_File_Surface() {
- SVG_Graphics_Driver *driver = (SVG_Graphics_Driver*)this->driver();
- fputs("</svg>\n", driver->file());
- fflush(driver->file());
- delete driver;
-}
-
-
-int main(int argc, char **argv) {
- Fl_Window *window = new Fl_Window(340,180);
- Fl_Box *box = new Fl_Box(20,40,300,100,"Hello, World!");
- box->box(FL_UP_BOX);
- box->labelfont(FL_BOLD+FL_ITALIC);
- box->labelsize(36);
- box->labeltype(FL_SHADOW_LABEL);
- window->end();
- window->show(argc, argv);
-
- FILE *out = fl_fopen("hello.svg", "w");
- if (out) {
- SVG_File_Surface *svg = new SVG_File_Surface(box->w(), box->h(), out);
- Fl_Surface_Device::push_current(svg);
- fl_color(box->color());
- fl_rectf(0, 0, box->w(), box->h());
- fl_font(box->labelfont(), 36);
- fl_color(box->labelcolor());
- fl_draw(box->label(), 5, 50);
- Fl_Surface_Device::pop_current();
- delete svg;
- fclose(out);
- }
-
- return Fl::run();
-}
-
-//
-// End of "$Id$".
-//
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