Output.cpp

#include "Output.h"
#include "cairo.h"
#include "global.h"
#include <iostream>
#include "Glyph.h"
#include "WordList.h"
#include "cairo-svg.h"
#include "cairo-pdf.h"
#include "utils.h"

using namespace std;

void draw_pic(WordList* words)
{
	//adjust all coords to be positive
	words->make_all_coords_positive();

	//see how close we got to desired ratio, calculate scaling amount
	double x_ratio = (settings.output_width -(settings.output_border*2))/(double)(words->right());	
	double y_ratio = (settings.output_height-(settings.output_border*2))/(double)(words->bottom());
	double scale_ratio = min(x_ratio,y_ratio);
	
  cairo_surface_t *surface;
	//set up the cairo objects
  string extension;
  switch (settings.output_format)
  {
  case of_SVG:
    extension = "svg";
    settings.output = extension_check(settings.output,extension);
    surface = cairo_svg_surface_create (settings.output.c_str(), settings.output_width, settings.output_height);
    //cairo_svg_surface_restrict_to_version(surface,CAIRO_SVG_VERSION_1_1);
    break;
  case of_PDF:
    extension = "pdf";
    settings.output = extension_check(settings.output,extension);
    surface = cairo_pdf_surface_create (settings.output.c_str(), settings.output_width, settings.output_height);
    //cairo_pdf_surface_restrict_to_version(surface,CAIRO_PDF_VERSION_1_4);
    break;    
  default:
    extension = "png";
    settings.output = extension_check(settings.output,extension);
    surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, settings.output_width, settings.output_height);
    break;
  }
  
	cairo_t *cr = cairo_create (surface);	
	cairo_select_font_face (cr, settings.font.c_str(), settings.font_style, settings.font_weight);
	
	//paint background
	if (!settings.transparent_background)
	{
		cairo_set_source_rgba(cr,color_manager.background_color().r,color_manager.background_color().g,color_manager.background_color().b,color_manager.background_color().a);
		cairo_paint(cr);
	}
  else 
  {
    cairo_set_source_rgba(cr,color_manager.background_color().r,color_manager.background_color().g,color_manager.background_color().b,0.0f);
		cairo_paint(cr);
  }

	//create coords translation and scale to fit output image size
	double translate_x = ((settings.output_width - (settings.output_border * 2)) - (words->right() * scale_ratio)) / (double)2;
	double translate_y = ((settings.output_height - (settings.output_border * 2)) - (words->bottom() * scale_ratio)) / (double)2;
	cairo_translate(cr,settings.output_border+ translate_x,settings.output_border + translate_y);
	cairo_scale(cr,scale_ratio,scale_ratio);
  
  image_matcher.Calculate_Ratio_Adjustments(words->right(), words->bottom());

	//loop thru words, painting them on the cairo context
	int i = 0;
	for(vector<CloudWord*>::iterator itcw = words->words->begin(); itcw < words->words->end(); itcw++)
	{
    //cout << i++ << " " << (*itcw)->text << endl;
    //cout << "next color" << endl;
		color_manager.next_color();
    //cout << "draw" << endl;
		(*itcw)->draw(cr);

    //cout << "settings check" << endl;
		if ((settings.trace_images) && (settings.output_format == of_PNG))
		{
			char tmpstr[50]; 
			sprintf(tmpstr,"output_trace_%d.png",++i);
			cairo_surface_write_to_png(surface,tmpstr);
		}
	}
	cairo_destroy (cr);
	
  //write the image out (for png - svg writes as soon as the surface is destroyed)
	if (settings.output_format == of_PNG)
  { 
    cairo_surface_write_to_png(surface,settings.output.c_str());
  }
	
	cairo_surface_destroy(surface);

}