head	1.5;
access;
symbols;
locks; strict;
comment	@ * @;


1.5
date	2005.05.17.15.24.39;	author cworth;	state Exp;
branches;
next	1.4;
commitid	22b4428a0cb74567;

1.4
date	2005.05.17.14.31.43;	author cworth;	state Exp;
branches;
next	1.3;
commitid	2e0428a004e4567;

1.3
date	2005.04.02.04.20.39;	author cworth;	state Exp;
branches;
next	1.2;

1.2
date	2004.05.11.14.52.19;	author pippin;	state Exp;
branches;
next	1.1;

1.1
date	2003.08.18.18.11.38;	author cworth;	state Exp;
branches;
next	;


desc
@@


1.5
log
@
        * bevels.c:
        * caps_joins.c:
        * hering.c:
        * outline.c:
        * snapping.c:
        * spiral.c:
        * splines_tolerance.c:
        * star_and_ring.c:
        * stars.c:
        * text-rotate.c:
        * text.c: Remove stale includes of write_png.h.
@
text
@/*
 * Copyright © 2003 USC, Information Sciences Institute
 *
 * Permission to use, copy, modify, distribute, and sell this software
 * and its documentation for any purpose is hereby granted without
 * fee, provided that the above copyright notice appear in all copies
 * and that both that copyright notice and this permission notice
 * appear in supporting documentation, and that the name of the
 * University of Southern California not be used in advertising or
 * publicity pertaining to distribution of the software without
 * specific, written prior permission. The University of Southern
 * California makes no representations about the suitability of this
 * software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 *
 * THE UNIVERSITY OF SOUTHERN CALIFORNIA DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL THE UNIVERSITY OF
 * SOUTHERN CALIFORNIA BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
 * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * Author: Carl D. Worth <cworth@@isi.edu>
 */

#include <cairo.h>

void
draw_caps_joins (cairo_t *cr, int width, int height);

void
stroke_v_twice (cairo_t *cr, int dx, int dy);

void
draw_three_vs (cairo_t *cr, int width, int height, int line_width);

#define WIDTH 600
#define HEIGHT 600
#define STRIDE (WIDTH * 4)

unsigned char image[STRIDE*HEIGHT];

int
main (void)
{
    cairo_surface_t *surface;
    cairo_t *cr;

    surface = cairo_image_surface_create_for_data (image, CAIRO_FORMAT_ARGB32,
						   WIDTH, HEIGHT, STRIDE);

    cr = cairo_create (surface);

    cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
    cairo_set_source_rgb (cr, 1, 1, 1);
    cairo_fill (cr);

    draw_caps_joins (cr, WIDTH, HEIGHT);

    cairo_surface_write_to_png (surface, "caps_joins.png");

    cairo_destroy (cr);

    cairo_surface_destroy (surface);

    return 0;
}

void
stroke_v_twice (cairo_t *cr, int width, int height)
{
    cairo_move_to (cr, 0, 0);
    cairo_rel_line_to (cr, width / 2, height / 2);
    cairo_rel_line_to (cr, width / 2, - height / 2);

    cairo_save (cr);
    cairo_stroke (cr);
    cairo_restore (cr);

    cairo_save (cr);
    {
	cairo_set_line_width (cr, 2.0);
	cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
	cairo_set_source_rgb (cr, 1, 1, 1);
	cairo_stroke (cr);
    }
    cairo_restore (cr);

    cairo_new_path (cr);
}

void
draw_caps_joins (cairo_t *cr, int width, int height)
{
    int line_width = height / 12 & (~1);

    cairo_set_line_width (cr, line_width);
    cairo_set_source_rgb (cr, 0, 0, 0);

    cairo_translate (cr, line_width, line_width);
    width -= 2 *line_width;

    cairo_set_line_join (cr, CAIRO_LINE_JOIN_BEVEL);
    cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
    stroke_v_twice (cr, width, height);

    cairo_translate (cr, 0, height / 4 - line_width);
    cairo_set_line_join (cr, CAIRO_LINE_JOIN_MITER);
    cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
    stroke_v_twice (cr, width, height);

    cairo_translate (cr, 0, height / 4 - line_width);
    cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
    cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
    stroke_v_twice (cr, width, height);
}



@


1.4
log
@
        * Makefile:
        * bevels.c: (set_hex_color), (main):
        * caps_joins.c: (main), (stroke_v_twice), (draw_caps_joins):
        * hering.c: (main), (draw_hering):
        * outline.c: (main), (create_gradient), (draw_outlines):
        * snapping.c: (snap_point_for_fill), (snap_point_for_stroke),
        (snap_line_width), (snap_path_for_fill), (snap_path_for_stroke),
        (draw_nested), (main):
        * spiral.c: (main), (draw_spiral):
        * splines_tolerance.c: (main), (draw_splines):
        * star_and_ring.c: (star_path), (fill_ring), (fill_star), (main):
        * stars.c: (main), (draw_stars):
        * text-rotate.c: (main):
        * text.c: (box_text), (box_glyphs), (main):
        Update all programs to match recent cairo API changes.
@
text
@a29 2
#include "write_png.h"

@


1.3
log
@
        * caps_joins.c:
        * hering.c:
        * outline.c:
        * spiral.c:
        * splines_tolerance.c:
        * stars.c:
        * text-rotate.c:
        * text.c:
        * write_png.c:
        * write_png.h: Convert file encodings to utf-8.
@
text
@d45 1
a45 1
char image[STRIDE*HEIGHT];
d50 1
d53 2
a54 1
    cr = cairo_create ();
d56 1
a56 2
    cairo_set_target_image (cr, image, CAIRO_FORMAT_ARGB32,
		      WIDTH, HEIGHT, STRIDE);
d59 1
a59 1
    cairo_set_rgb_color (cr, 1, 1, 1);
d64 1
a64 1
    write_png_argb32 (image, "caps_joins.png", WIDTH, HEIGHT, STRIDE);
d68 2
d88 1
a88 1
	cairo_set_rgb_color (cr, 1, 1, 1);
d102 1
a102 1
    cairo_set_rgb_color (cr, 0, 0, 0);
@


1.2
log
@global replacing of ct with cr
@
text
@d2 1
a2 1
 * Copyright © 2003 USC, Information Sciences Institute
@


1.1
log
@Added demos from OLS paper.
@
text
@d33 1
a33 1
draw_caps_joins (cairo_t *ct, int width, int height);
d36 1
a36 1
stroke_v_twice (cairo_t *ct, int dx, int dy);
d39 1
a39 1
draw_three_vs (cairo_t *ct, int width, int height, int line_width);
d50 1
a50 1
    cairo_t *ct;
d52 1
a52 1
    ct = cairo_create ();
d54 1
a54 1
    cairo_set_target_image (ct, image, CAIRO_FORMAT_ARGB32,
d57 3
a59 3
    cairo_rectangle (ct, 0, 0, WIDTH, HEIGHT);
    cairo_set_rgb_color (ct, 1, 1, 1);
    cairo_fill (ct);
d61 1
a61 1
    draw_caps_joins (ct, WIDTH, HEIGHT);
d65 1
a65 1
    cairo_destroy (ct);
d71 1
a71 1
stroke_v_twice (cairo_t *ct, int width, int height)
d73 7
a79 7
    cairo_move_to (ct, 0, 0);
    cairo_rel_line_to (ct, width / 2, height / 2);
    cairo_rel_line_to (ct, width / 2, - height / 2);

    cairo_save (ct);
    cairo_stroke (ct);
    cairo_restore (ct);
d81 1
a81 1
    cairo_save (ct);
d83 4
a86 4
	cairo_set_line_width (ct, 2.0);
	cairo_set_line_cap (ct, CAIRO_LINE_CAP_BUTT);
	cairo_set_rgb_color (ct, 1, 1, 1);
	cairo_stroke (ct);
d88 1
a88 1
    cairo_restore (ct);
d90 1
a90 1
    cairo_new_path (ct);
d94 1
a94 1
draw_caps_joins (cairo_t *ct, int width, int height)
d98 2
a99 2
    cairo_set_line_width (ct, line_width);
    cairo_set_rgb_color (ct, 0, 0, 0);
d101 1
a101 1
    cairo_translate (ct, line_width, line_width);
d104 13
a116 13
    cairo_set_line_join (ct, CAIRO_LINE_JOIN_BEVEL);
    cairo_set_line_cap (ct, CAIRO_LINE_CAP_BUTT);
    stroke_v_twice (ct, width, height);

    cairo_translate (ct, 0, height / 4 - line_width);
    cairo_set_line_join (ct, CAIRO_LINE_JOIN_MITER);
    cairo_set_line_cap (ct, CAIRO_LINE_CAP_SQUARE);
    stroke_v_twice (ct, width, height);

    cairo_translate (ct, 0, height / 4 - line_width);
    cairo_set_line_join (ct, CAIRO_LINE_JOIN_ROUND);
    cairo_set_line_cap (ct, CAIRO_LINE_CAP_ROUND);
    stroke_v_twice (ct, width, height);
@