[cairo-commit] cairomm/examples/text-rotate .cvsignore, NONE, 1.1 Makefile.am, NONE, 1.1 text-rotate.cc, NONE, 1.1

[Jonathon Jongsma]

Committed by: jjongsma

Update of /cvs/cairo/cairomm/examples/text-rotate
In directory kemper:/tmp/cvs-serv9035/examples/text-rotate

Added Files:
	.cvsignore Makefile.am text-rotate.cc 
Log Message:
2006-03-14  Jonathon Jongsma  <jonathon.jongsma at gmail.com>

	* configure.in:
	* examples/Makefile.am:
	* examples/text-rotate/.cvsignore:
	* examples/text-rotate/Makefile.am:
	* examples/text-rotate/text-rotate.cc: Added another basic example,
	borrowed from a test-case in cairo.  This one is just a simple example of
	using text in cairomm


--- NEW FILE: .cvsignore ---
.deps
.libs
Makefile
Makefile.in
text_rotate
text-rotate.png

--- NEW FILE: Makefile.am ---
include $(top_srcdir)/examples/Makefile.am_fragment

# build the executable but don't install it
noinst_PROGRAMS = text_rotate
text_rotate_SOURCES = text-rotate.cc

CLEANFILES = text-rotate.png

--- NEW FILE: text-rotate.cc ---
/*
/* Copyright (C) 2005 The cairomm Development Team
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#include <string>
#include <cairomm/cairomm.h>

// This example is based on the C cairo example of the same name

const int WIDTH = 150;
const int HEIGHT = 150;
const int NUM_TEXT = 20;
const int TEXT_SIZE = 12;

/* Draw the word cairo at NUM_TEXT different angles */
void draw(Cairo::RefPtr<Cairo::Context> cr, int width, int height)
{
    int i, x_off, y_off;
    Cairo::TextExtents extents;
    std::string text("cairo");

    cr->select_font_face("Bitstream Vera Sans", Cairo::FONT_SLANT_NORMAL,
            Cairo::FONT_WEIGHT_NORMAL);
    cr->set_font_size(TEXT_SIZE);

    Cairo::FontOptions font_options;

    font_options.set_hint_style(Cairo::HINT_STYLE_NONE);
    font_options.set_hint_metrics(Cairo::HINT_METRICS_OFF);
    font_options.set_antialias(Cairo::ANTIALIAS_GRAY);

    cr->set_font_options(font_options);

    cr->set_source_rgb(0.0, 0.0, 0.0);

    cr->translate(WIDTH / 2.0, HEIGHT / 2.0);

    cr->get_text_extents(text, extents);

    if (NUM_TEXT == 1)
    {
        x_off = y_off = 0;
    }
    else
    {
        y_off = (int) - floor(0.5 + extents.height / 2.0);
        x_off = (int) floor(0.5 + (extents.height + 1.0) / (2.0 * tan (M_PI / NUM_TEXT)));
    }
  
    for (i=0; i < NUM_TEXT; i++)
    {
        cr->save();
        cr->rotate(2 * M_PI * i / NUM_TEXT);
        cr->set_line_width(1.0);
        cr->rectangle(x_off - 0.5, y_off - 0.5, extents.width + 1,
                extents.height + 1);
        cr->set_source_rgb(1, 0, 0);
        cr->stroke();
        cr->move_to(x_off - extents.x_bearing, y_off - extents.y_bearing);
        cr->set_source_rgb(0, 0, 0);
        cr->show_text("cairo");
        cr->restore();
    }
}

int main (void)
{
    Cairo::RefPtr<Cairo::ImageSurface> surface = Cairo::ImageSurface::create(Cairo::FORMAT_ARGB32, WIDTH, HEIGHT);
    Cairo::RefPtr<Cairo::Context> cr = Cairo::Context::create(surface);
    draw(cr, WIDTH, HEIGHT);
    surface->write_to_png("text-rotate.png");
}