head	1.9;
access;
symbols;
locks; strict;
comment	@ * @;


1.9
date	2005.07.29.07.48.07;	author behdad;	state Exp;
branches;
next	1.8;
commitid	284a42e9df0e4567;

1.8
date	2005.05.17.15.24.39;	author cworth;	state Exp;
branches;
next	1.7;
commitid	22b4428a0cb74567;

1.7
date	2005.05.17.14.31.43;	author cworth;	state Exp;
branches;
next	1.6;
commitid	2e0428a004e4567;

1.6
date	2005.04.02.04.20.39;	author cworth;	state Exp;
branches;
next	1.5;

1.5
date	2004.05.11.14.52.19;	author pippin;	state Exp;
branches;
next	1.4;

1.4
date	2004.04.06.20.08.20;	author davidr;	state Exp;
branches;
next	1.3;

1.3
date	2003.12.11.15.09.12;	author cworth;	state Exp;
branches;
next	1.2;

1.2
date	2003.09.04.13.54.29;	author cworth;	state Exp;
branches;
next	1.1;

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


desc
@@


1.9
log
@2005-07-29  Behdad Esfahbod  <behdad@@behdad.org

        * bevels.c: Remove C99ism. Shut gcc warning off.
        * outline.c: Remove useless argument. Shut gcc warning off.
        * snapping.c: Don't shadow y1. Shut gcc warning off.
@
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_outlines (cairo_t *cr, int surface_width, int surface_height);

void
draw_flat (cairo_t *cr, double width, double height);

void
draw_tent (cairo_t *cr, double width, double height);

void
draw_cylinder (cairo_t *cr, double width, double height);

cairo_pattern_t *
create_gradient (double width, double height);

#define WIDTH 750
#define HEIGHT 500
#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_outlines (cr, WIDTH, HEIGHT);

    cairo_surface_write_to_png (surface, "outline.png");

    cairo_destroy (cr);

    cairo_surface_destroy (surface);

    return 0;
}

cairo_pattern_t *
create_gradient (double width, double height)
{
    cairo_pattern_t *gradient;

    gradient = cairo_pattern_create_linear (0, 0, width, 0);

    cairo_pattern_add_color_stop_rgb (gradient, 0.0,
				      0., 0., 0.);

    cairo_pattern_add_color_stop_rgb (gradient, 0.5,
				      1., 1., 1.);

    cairo_pattern_add_color_stop_rgb (gradient, 1.0,
				      0., 0., 0.);

    return gradient;
}

void
draw_outlines (cairo_t *cr, int surface_width, int surface_height)
{
    cairo_pattern_t *gradient;
    double width, height, pad;

    width = surface_width / 4.0;
    pad = (surface_width - (3 * width)) / 2.0;
    height = surface_height;

    gradient = create_gradient (width, height);

    cairo_set_source (cr, gradient);
    draw_flat (cr, width, height);

    cairo_translate (cr, width + pad, 0);
    cairo_set_source (cr, gradient);
    draw_tent (cr, width, height);

    cairo_translate (cr, width + pad, 0);
    cairo_set_source (cr, gradient);
    draw_cylinder (cr, width, height);

    cairo_restore (cr);

    cairo_pattern_destroy (gradient);
}

void
draw_flat (cairo_t *cr, double width, double height)
{
    double hwidth = width / 2.0;

    cairo_rectangle (cr, 0, hwidth, width, height - hwidth);

    cairo_fill (cr);
}

void
draw_tent (cairo_t *cr, double width, double height)
{
    double hwidth = width / 2.0;

    cairo_move_to    (cr,       0,  hwidth);
    cairo_rel_line_to (cr,  hwidth, -hwidth);
    cairo_rel_line_to (cr,  hwidth,  hwidth);
    cairo_rel_line_to (cr,       0,  height - hwidth);
    cairo_rel_line_to (cr, -hwidth, -hwidth);
    cairo_rel_line_to (cr, -hwidth,  hwidth);
    cairo_close_path (cr);

    cairo_fill (cr);
}

void
draw_cylinder (cairo_t *cr, double width, double height)
{
    double hwidth = width / 2.0;

    cairo_move_to (cr, 0, hwidth);
    cairo_rel_curve_to (cr,
		      0, -hwidth,
		  width, -hwidth,
		  width, 0);
    cairo_rel_line_to (cr, 0, height - hwidth);
    cairo_rel_curve_to (cr,
		       0, -hwidth,
		  -width, -hwidth,
		  -width, 0);
    cairo_close_path (cr);

    cairo_fill (cr);
}
@


1.8
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
@d43 1
a43 1
create_gradient (cairo_t *cr, double width, double height);
d77 1
a77 1
create_gradient (cairo_t *cr, double width, double height)
d105 1
a105 1
    gradient = create_gradient (cr, width, height);
@


1.7
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"

@


1.6
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
@d51 1
a51 1
char image[STRIDE*HEIGHT];
d56 1
d59 3
a61 4
    cr = cairo_create ();

    cairo_set_target_image (cr, image, CAIRO_FORMAT_ARGB32,
		      WIDTH, HEIGHT, STRIDE);
d64 1
a64 1
    cairo_set_rgb_color (cr, 1, 1, 1);
d69 1
a69 1
    write_png_argb32 (image, "outline.png", WIDTH, HEIGHT, STRIDE);
d73 2
d81 1
a81 14
    cairo_surface_t *gradient;
    cairo_matrix_t *matrix;
    cairo_pattern_t *gradient_pattern;

    cairo_save (cr);

    gradient = cairo_surface_create_similar (cairo_current_target_surface (cr),
					     CAIRO_FORMAT_ARGB32,
					     3, 2);
    cairo_set_target_surface (cr, gradient);

    cairo_set_rgb_color (cr, 0, 0, 0);
    cairo_rectangle (cr, 0, 0, 1, 2);
    cairo_fill (cr);
d83 1
a83 3
    cairo_set_rgb_color (cr, 1, 1, 1);
    cairo_rectangle (cr, 1, 0, 1, 2);
    cairo_fill (cr);
d85 2
a86 3
    cairo_set_rgb_color (cr, 0, 0, 0);
    cairo_rectangle (cr, 2, 0, 1, 2);
    cairo_fill (cr);
d88 2
a89 1
    cairo_restore (cr);
d91 2
a92 10
    matrix = cairo_matrix_create ();
    cairo_matrix_scale (matrix,
		   2.0 / width,
		   1.0 / height);
    
    gradient_pattern = cairo_pattern_create_for_surface (gradient);
    cairo_surface_destroy (gradient);
    cairo_pattern_set_matrix (gradient_pattern, matrix);
    cairo_pattern_set_filter (gradient_pattern, CAIRO_FILTER_BILINEAR);
    cairo_matrix_destroy (matrix);
d94 1
a94 1
    return gradient_pattern;
d109 1
a109 1
    cairo_set_pattern (cr, gradient);
d113 1
a113 1
    cairo_set_pattern (cr, gradient);
d117 1
a117 1
    cairo_set_pattern (cr, gradient);
@


1.5
log
@global replacing of ct with cr
@
text
@d2 1
a2 1
 * Copyright © 2003 USC, Information Sciences Institute
@


1.4
log
@Fix cairo_set_pattern
@
text
@d33 1
a33 1
draw_outlines (cairo_t *ct, int surface_width, int surface_height);
d36 1
a36 1
draw_flat (cairo_t *ct, double width, double height);
d39 1
a39 1
draw_tent (cairo_t *ct, double width, double height);
d42 1
a42 1
draw_cylinder (cairo_t *ct, double width, double height);
d45 1
a45 1
create_gradient (cairo_t *ct, double width, double height);
d56 1
a56 1
    cairo_t *ct;
d58 1
a58 1
    ct = cairo_create ();
d60 1
a60 1
    cairo_set_target_image (ct, image, CAIRO_FORMAT_ARGB32,
d63 3
a65 3
    cairo_rectangle (ct, 0, 0, WIDTH, HEIGHT);
    cairo_set_rgb_color (ct, 1, 1, 1);
    cairo_fill (ct);
d67 1
a67 1
    draw_outlines (ct, WIDTH, HEIGHT);
d71 1
a71 1
    cairo_destroy (ct);
d77 1
a77 1
create_gradient (cairo_t *ct, double width, double height)
d83 1
a83 1
    cairo_save (ct);
d85 1
a85 1
    gradient = cairo_surface_create_similar (cairo_current_target_surface (ct),
d88 1
a88 1
    cairo_set_target_surface (ct, gradient);
d90 3
a92 3
    cairo_set_rgb_color (ct, 0, 0, 0);
    cairo_rectangle (ct, 0, 0, 1, 2);
    cairo_fill (ct);
d94 3
a96 3
    cairo_set_rgb_color (ct, 1, 1, 1);
    cairo_rectangle (ct, 1, 0, 1, 2);
    cairo_fill (ct);
d98 3
a100 3
    cairo_set_rgb_color (ct, 0, 0, 0);
    cairo_rectangle (ct, 2, 0, 1, 2);
    cairo_fill (ct);
d102 1
a102 1
    cairo_restore (ct);
d119 1
a119 1
draw_outlines (cairo_t *ct, int surface_width, int surface_height)
d128 1
a128 1
    gradient = create_gradient (ct, width, height);
d130 2
a131 2
    cairo_set_pattern (ct, gradient);
    draw_flat (ct, width, height);
d133 3
a135 3
    cairo_translate (ct, width + pad, 0);
    cairo_set_pattern (ct, gradient);
    draw_tent (ct, width, height);
d137 3
a139 3
    cairo_translate (ct, width + pad, 0);
    cairo_set_pattern (ct, gradient);
    draw_cylinder (ct, width, height);
d141 1
a141 1
    cairo_restore (ct);
d147 1
a147 1
draw_flat (cairo_t *ct, double width, double height)
d151 1
a151 1
    cairo_rectangle (ct, 0, hwidth, width, height - hwidth);
d153 1
a153 1
    cairo_fill (ct);
d157 1
a157 1
draw_tent (cairo_t *ct, double width, double height)
d161 7
a167 7
    cairo_move_to    (ct,       0,  hwidth);
    cairo_rel_line_to (ct,  hwidth, -hwidth);
    cairo_rel_line_to (ct,  hwidth,  hwidth);
    cairo_rel_line_to (ct,       0,  height - hwidth);
    cairo_rel_line_to (ct, -hwidth, -hwidth);
    cairo_rel_line_to (ct, -hwidth,  hwidth);
    cairo_close_path (ct);
d169 1
a169 1
    cairo_fill (ct);
d173 1
a173 1
draw_cylinder (cairo_t *ct, double width, double height)
d177 2
a178 2
    cairo_move_to (ct, 0, hwidth);
    cairo_rel_curve_to (ct,
d182 2
a183 2
    cairo_rel_line_to (ct, 0, height - hwidth);
    cairo_rel_curve_to (ct,
d187 1
a187 1
    cairo_close_path (ct);
d189 1
a189 1
    cairo_fill (ct);
@


1.3
log
@
        * Makefile (CFLAGS): Use pkg-config to find libpng.
@
text
@d44 1
a44 1
cairo_surface_t *
d76 1
a76 1
cairo_surface_t *
d81 1
d108 5
a112 2
    cairo_surface_set_matrix (gradient, matrix);
    cairo_surface_set_filter (gradient, CAIRO_FILTER_BILINEAR);
d115 1
a115 1
    return gradient;
d121 1
a121 1
    cairo_surface_t *gradient;
d143 1
a143 1
    cairo_surface_destroy (gradient);
@


1.2
log
@Updated to track changes in Cairo API
@
text
@d85 2
a86 2
				      CAIRO_FORMAT_ARGB32,
				      3, 2);
@


1.1
log
@Added demos from OLS paper.
@
text
@d84 1
a84 1
    gradient = cairo_surface_create_similar (cairo_get_target_surface (ct),
@