head	1.12;
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comment	@ * @;


1.12
date	2005.09.14.18.39.35;	author cworth;	state Exp;
branches;
next	1.11;
commitid	6ee543286e674567;

1.11
date	2005.05.17.15.24.39;	author cworth;	state Exp;
branches;
next	1.10;
commitid	22b4428a0cb74567;

1.10
date	2005.05.17.14.52.23;	author cworth;	state Exp;
branches;
next	1.9;
commitid	e64428a05274567;

1.9
date	2005.05.17.14.31.43;	author cworth;	state Exp;
branches;
next	1.8;
commitid	2e0428a004e4567;

1.8
date	2005.04.02.04.20.39;	author cworth;	state Exp;
branches;
next	1.7;

1.7
date	2005.01.11.19.47.53;	author cworth;	state Exp;
branches;
next	1.6;

1.6
date	2004.02.19.23.22.15;	author dajobe;	state Exp;
branches;
next	1.5;

1.5
date	2003.12.16.15.23.36;	author cworth;	state Exp;
branches;
next	1.4;

1.4
date	2003.12.16.03.01.54;	author cworth;	state Exp;
branches;
next	1.3;

1.3
date	2003.12.16.02.34.12;	author cworth;	state Exp;
branches;
next	1.2;

1.2
date	2003.10.25.00.51.26;	author cworth;	state Exp;
branches;
next	1.1;

1.1
date	2003.10.24.20.41.50;	author cworth;	state Exp;
branches;
next	;


desc
@@


1.12
log
@
2005-09-14  Carl Worth  <cworth@@cworth.org>

        * text.c (box_text): Update for change in cairo_show_text
        semantics in that it now moves the current point.
@
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>
#include <math.h>

#define TEXT "hello, world"

#define WIDTH 450
#define HEIGHT 600
#define STRIDE (WIDTH * 4)

#define DOUBLE_TO_26_6(d) ((FT_F26Dot6)((d) * 64.0))
#define DOUBLE_FROM_26_6(t) ((double)(t) / 64.0)
#define DOUBLE_TO_16_16(d) ((FT_Fixed)((d) * 65536.0))
#define DOUBLE_FROM_16_16(t) ((double)(t) / 65536.0)

unsigned char image[STRIDE*HEIGHT];

static void
box_text (cairo_t *cr, const char *utf8, double x, double y)
{
    double line_width;
    cairo_text_extents_t extents;

    cairo_save (cr);

    cairo_text_extents (cr, TEXT, &extents);
    line_width = cairo_get_line_width (cr);
    cairo_rectangle (cr,
		     x + extents.x_bearing - line_width,
		     y + extents.y_bearing - line_width,
		     extents.width  + 2 * line_width,
		     extents.height + 2 * line_width);
    cairo_stroke (cr);

    cairo_move_to (cr, x, y);
    cairo_show_text (cr, utf8);
    cairo_move_to (cr, x, y);
    cairo_text_path (cr, utf8);
    cairo_set_source_rgb (cr, 1, 0, 0);
    cairo_set_line_width (cr, 1.0);
    cairo_stroke (cr);

    cairo_restore (cr);
}

static void
box_glyphs (cairo_t *cr, cairo_glyph_t *glyphs, int num_glyphs,
	    double x, double y)
{
    int i;
    double line_width;
    cairo_text_extents_t extents;

    cairo_save (cr);

    cairo_glyph_extents (cr, glyphs, num_glyphs, &extents);
    line_width = cairo_get_line_width (cr);
    cairo_rectangle (cr,
		     x + extents.x_bearing - line_width,
		     y + extents.y_bearing - line_width,
		     extents.width  + 2 * line_width,
		     extents.height + 2 * line_width);
    cairo_stroke (cr);

    for (i=0; i < num_glyphs; i++) {
	glyphs[i].x += x;
	glyphs[i].y += y;
    }
    cairo_show_glyphs (cr, glyphs, num_glyphs);
    cairo_glyph_path (cr, glyphs, num_glyphs);
    cairo_set_source_rgb (cr, 1, 0, 0);
    cairo_set_line_width (cr, 1.0);
    cairo_stroke (cr);
    for (i=0; i < num_glyphs; i++) {
	glyphs[i].x -= x;
	glyphs[i].y -= y;
    }

    cairo_restore (cr);
}

int
main (void)
{
    int i;
    cairo_surface_t *surface;
    cairo_t *cr;
    cairo_text_extents_t extents;
    cairo_font_extents_t font_extents;
    double dx, dy;
    double height;
#define NUM_GLYPHS 10
    cairo_glyph_t glyphs[NUM_GLYPHS];

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


    cr = cairo_create (surface);

    cairo_set_source_rgb (cr, 0., 0., 0.);
    cairo_set_line_width (cr, 2.0);

    cairo_save (cr);
    cairo_rectangle (cr, 0., 0., WIDTH, HEIGHT);
    cairo_set_source_rgba (cr, 0., 0., 0., 0.);
    cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
    cairo_fill (cr);
    cairo_restore (cr);

    cairo_select_font_face (cr, "sans", 0, 0);
    cairo_set_font_size (cr, 40);
#define XXX_DEMONSTRATE_EXTENTS_BUGS_WHEN_FONT_IS_TRANSFORMED 1
#if XXX_DEMONSTRATE_EXTENTS_BUGS_WHEN_FONT_IS_TRANSFORMED
    {
	cairo_matrix_t matrix;
	cairo_matrix_init_scale (&matrix, 40.0, -40.0);
	cairo_set_font_matrix (cr, &matrix);
    }

    cairo_scale (cr, 1.0, -1.0);
    cairo_translate (cr, 0.0, - HEIGHT);
#endif

    cairo_font_extents (cr, &font_extents);
    height = font_extents.height;

    dx = 0.0;
    dy = 0.0;
    for (i=0; i < NUM_GLYPHS; i++) {
	glyphs[i].index = i + 4;
	glyphs[i].x = dx;
	glyphs[i].y = dy;
	cairo_glyph_extents (cr, &glyphs[i], 1, &extents);
	dx += extents.x_advance;
	dy += extents.y_advance;
    }

    box_text (cr, TEXT, 10, height);

    cairo_translate (cr, 0, height);
    cairo_save (cr);
    {
	cairo_translate (cr, 10, height);
	cairo_rotate (cr, 10 * M_PI / 180.0);
	box_text (cr, TEXT, 0, 0);
    }
    cairo_restore (cr);

    cairo_translate (cr, 0, 2 * height);
    cairo_save (cr);
    {
	cairo_matrix_t matrix;
	cairo_matrix_init_identity (&matrix);
	cairo_matrix_scale (&matrix, 40, -40);
	cairo_matrix_rotate (&matrix, -10 * M_PI / 180.0);
	cairo_set_font_matrix (cr, &matrix);
    }
    box_text (cr, TEXT, 10, height);
    cairo_restore (cr);

    cairo_translate (cr, 0, 2 * height);
    box_glyphs (cr, glyphs, NUM_GLYPHS, 10, height);

    cairo_translate (cr, 10, 2 * height);
    cairo_save (cr);
    {
	cairo_rotate (cr, 10 * M_PI / 180.0);
	box_glyphs (cr, glyphs, NUM_GLYPHS, 0, 0);
    }
    cairo_restore (cr);

    cairo_translate (cr, 0, height);
    for (i=0; i < NUM_GLYPHS; i++)
	glyphs[i].y += i * 5;
    box_glyphs (cr, glyphs, NUM_GLYPHS, 10, height);

    cairo_surface_write_to_png (surface, "text.png");

    cairo_destroy (cr);

    cairo_surface_destroy (surface);

    return 0;
}
@


1.11
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
@d63 1
d139 1
a139 1
#define XXX_DEMONSTRATE_EXTENTS_BUGS_WHEN_FONT_IS_TRANSFORMED 0
d142 3
a144 4
	cairo_matrix_t *matrix = cairo_matrix_create ();
	cairo_matrix_scale (matrix, 1.0, -1.0);
	cairo_set_font_matrix (cr, matrix);
	cairo_matrix_destroy (matrix);
d181 2
a182 2
	cairo_matrix_scale (&matrix, 40, 40);
	cairo_matrix_rotate (&matrix, 10 * M_PI / 180.0);
@


1.10
log
@
        * text.c (main): Remove #warning since I figured out what I was
        doing wrong with cairo_set_font_matrix.
@
text
@a30 2
#include "write_png.h"

@


1.9
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
@a184 1
#warning it looks like cairo_set_font_matrix is not currently working
@


1.8
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
@d44 1
a44 1
char image[STRIDE*HEIGHT];
d55 1
a55 1
    line_width = cairo_current_line_width (cr);
d66 1
a66 1
    cairo_set_rgb_color (cr, 1, 0, 0);
d84 1
a84 1
    line_width = cairo_current_line_width (cr);
d98 1
a98 1
    cairo_set_rgb_color (cr, 1, 0, 0);
d113 1
d122 2
a123 1
    cr = cairo_create ();
a124 2
    cairo_set_target_image (cr, image, CAIRO_FORMAT_ARGB32,
			    WIDTH, HEIGHT, STRIDE);
d126 3
a128 1
    cairo_set_rgb_color (cr, 0., 0., 0.);
d133 2
a134 2
    cairo_set_alpha (cr, 0.);
    cairo_set_operator (cr, CAIRO_OPERATOR_SRC);
d138 2
a139 2
    cairo_select_font (cr, "sans", 0, 0);
    cairo_scale_font (cr, 40);
d145 1
a145 1
	cairo_transform_font (cr, matrix);
d153 1
a153 1
    cairo_current_font_extents (cr, &font_extents);
d181 6
a186 4
	cairo_matrix_t *matrix = cairo_matrix_create ();
	cairo_matrix_rotate (matrix, 10 * M_PI / 180.0);
	cairo_transform_font (cr, matrix);
	cairo_matrix_destroy (matrix);
d207 1
a207 1
    write_png_argb32 (image, "text.png", WIDTH, HEIGHT, STRIDE);
d211 2
@


1.7
log
@Change to use sans rather then serif font
@
text
@d2 1
a2 1
 * Copyright © 2003 USC, Information Sciences Institute
@


1.6
log
@	* text.c, text-rotate.c: Remove FcFini call from newer fontconfig
	than I have here (2.2.1).  May leak memory if valgrind checking.
@
text
@d136 1
a136 1
    cairo_select_font (cr, "serif", 0, 0);
@


1.5
log
@
        * text.c (box_text):
        (box_glyphs): Add calls to cairo_text_path and cairo_glyph_path to
        demonstrate how to draw stroked (outlined) text.
@
text
@a206 2
    FcFini ();

@


1.4
log
@
        (box_glyphs):
        (box_text): Track changes in cairo_text_extents_t structure.
@
text
@d52 2
d57 4
a60 4
		     x + extents.x_bearing - line_width / 2.0,
		     y + extents.y_bearing - line_width / 2.0,
		     extents.width  + line_width,
		     extents.height + line_width);
d64 7
a70 1
    cairo_show_text (cr, TEXT);
d81 2
d86 4
a89 4
		     x + extents.x_bearing - line_width / 2.0,
		     y + extents.y_bearing - line_width / 2.0,
		     extents.width  + line_width,
		     extents.height + line_width);
d97 4
d105 2
d127 1
@


1.3
log
@
        * text.c: Add boxes to demonstrate use of cairo_text_extents and
        cairo_glyph_extents. Add several text examples to demonstrate
        behavior of extents under various transformations.
@
text
@d55 4
a58 4
		     x + extents.left_side_bearing - line_width / 2.0,
		     y + extents.ascent - line_width / 2.0,
		     extents.right_side_bearing - extents.left_side_bearing + line_width,
		     -extents.ascent + extents.descent + line_width);
d76 4
a79 4
		     x + extents.left_side_bearing - line_width / 2.0,
		     y + extents.ascent - line_width / 2.0,
		     extents.right_side_bearing - extents.left_side_bearing + line_width,
		     - extents.ascent + extents.descent + line_width);
@


1.2
log
@Change text to "hello, world".
Fix to generate a .png with transparent background.
@
text
@d33 4
a36 2
#define WIDTH 80
#define HEIGHT 20
d39 5
d46 47
d96 1
d98 6
d119 66
a184 3
    cairo_scale_font (cr, 10);
    cairo_move_to (cr, 10, 15);
    cairo_show_text (cr, "hello, world");
d190 2
@


1.1
log
@Add text.c to demonstrate libic bug.
@
text
@d33 1
a33 1
#define WIDTH 500
d49 6
a54 2
    cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
    cairo_set_rgb_color (cr, 1, 1, 1);
d56 1
a56 2

    cairo_set_rgb_color (cr, 0, 0, 0);
d60 1
a60 1
    cairo_show_text (cr, "S"); /* Hello World. ABCDEFGHIJKLMOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"); */
@