add cairo

1 files changed, 368 insertions, 0 deletions

diff --git a/libs/cairo-1.16.0/test/user-font-rescale.c b/libs/cairo-1.16.0/test/user-font-rescale.c
new file mode 100644
index 0000000..6f03b8e
--- /dev/null
+++ b/libs/cairo-1.16.0/test/user-font-rescale.c
@@ -0,0 +1,368 @@
+/*
+ * Copyright © 2008 Jeff Muizelaar
+ *
+ * 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
+ * Jeff Muizelaar not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Jeff Muizelaar makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * JEFF MUIZELAAR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL JEFF MUIZELAAR 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.
+ *
+ * Contributor(s):
+ *	Jeff Muizelaar <jeff@infidigm.net>
+ *	Kristian Høgsberg <krh@redhat.com>
+ *	Behdad Esfahbod <behdad@behdad.org>
+ */
+
+#include "cairo-test.h"
+
+#include <math.h>
+
+#define BORDER 10
+#define TEXT_SIZE 32
+#define WIDTH  (TEXT_SIZE * 13.75 + 2*BORDER)
+#define HEIGHT ((TEXT_SIZE + 2*BORDER)*3 + BORDER)
+#define TEXT   "test of rescaled glyphs"
+
+static const cairo_user_data_key_t rescale_font_closure_key;
+
+struct rescaled_font {
+    cairo_font_face_t *substitute_font;
+    cairo_scaled_font_t *measuring_font;
+    unsigned long glyph_count;
+    unsigned long start;
+    double *desired_width;
+    double *rescale_factor;
+};
+
+static cairo_status_t
+test_scaled_font_render_glyph (cairo_scaled_font_t  *scaled_font,
+			       unsigned long         glyph,
+			       cairo_t              *cr,
+			       cairo_text_extents_t *metrics)
+{
+    cairo_font_face_t *user_font;
+    struct rescaled_font *r;
+    cairo_glyph_t cairo_glyph;
+
+    cairo_glyph.index = glyph;
+    cairo_glyph.x = 0;
+    cairo_glyph.y = 0;
+
+    user_font = cairo_scaled_font_get_font_face (scaled_font);
+    r = cairo_font_face_get_user_data (user_font, &rescale_font_closure_key);
+    cairo_set_font_face (cr, r->substitute_font);
+
+    if (glyph - r->start < r->glyph_count) {
+	cairo_matrix_t matrix;
+
+	if (isnan (r->rescale_factor[glyph - r->start])) {
+	    double desired_width;
+	    double actual_width;
+	    cairo_text_extents_t extents;
+
+	    /* measure the glyph and compute the necessary rescaling factor */
+	    cairo_scaled_font_glyph_extents (r->measuring_font,
+					     &cairo_glyph, 1,
+					     &extents);
+
+	    desired_width = r->desired_width[glyph - r->start];
+	    actual_width = extents.x_advance;
+
+	    r->rescale_factor[glyph - r->start] = desired_width / actual_width;
+	}
+
+	/* scale the font so that the glyph width matches the desired width */
+	cairo_get_font_matrix (cr, &matrix);
+	cairo_matrix_scale (&matrix, r->rescale_factor[glyph - r->start], 1.);
+	cairo_set_font_matrix (cr, &matrix);
+    }
+
+    cairo_show_glyphs (cr, &cairo_glyph, 1);
+    cairo_glyph_extents (cr, &cairo_glyph, 1, metrics);
+
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static void
+unichar_to_utf8 (uint32_t ucs4, char utf8[7])
+{
+    int i, charlen, first;
+
+    if (ucs4 < 0x80) {
+	first = 0;
+	charlen = 1;
+    } else if (ucs4 < 0x800) {
+	first = 0xc0;
+	charlen = 2;
+    } else if (ucs4 < 0x10000) {
+	first = 0xe0;
+	charlen = 3;
+    } else if (ucs4 < 0x200000) {
+	first = 0xf0;
+	charlen = 4;
+    } else if (ucs4 < 0x4000000) {
+	first = 0xf8;
+	charlen = 5;
+    } else {
+	first = 0xfc;
+	charlen = 6;
+    }
+
+    for (i = charlen - 1; i > 0; --i) {
+	utf8[i] = (ucs4 & 0x3f) | 0x80;
+	ucs4 >>= 6;
+    }
+    utf8[0] = ucs4 | first;
+    utf8[charlen] = '\0';
+}
+
+static cairo_status_t
+test_scaled_font_unicode_to_glyph (cairo_scaled_font_t *scaled_font,
+				   unsigned long        unicode,
+				   unsigned long       *glyph_index)
+{
+    cairo_font_face_t *user_font;
+    struct rescaled_font *r;
+    int num_glyphs;
+    cairo_glyph_t *glyphs = NULL;
+    cairo_status_t status;
+    char utf8[7];
+
+    user_font = cairo_scaled_font_get_font_face (scaled_font);
+
+    unichar_to_utf8 (unicode, utf8);
+    r = cairo_font_face_get_user_data (user_font, &rescale_font_closure_key);
+    status  = cairo_scaled_font_text_to_glyphs (r->measuring_font, 0, 0,
+						utf8, -1,
+						&glyphs, &num_glyphs,
+						NULL, NULL, NULL);
+    if (status)
+	return status;
+
+    *glyph_index = glyphs[0].index;
+
+    cairo_glyph_free (glyphs);
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static void rescale_font_closure_destroy (void *data)
+{
+    struct rescaled_font *r = data;
+
+    cairo_font_face_destroy (r->substitute_font);
+    cairo_scaled_font_destroy (r->measuring_font);
+    free (r->desired_width);
+    free (r->rescale_factor);
+    free (r);
+}
+
+static cairo_status_t
+create_rescaled_font (cairo_font_face_t *substitute_font,
+		      int glyph_start,
+		      int glyph_count,
+		      double *desired_width,
+		      cairo_font_face_t **out)
+{
+    cairo_font_face_t *user_font_face;
+    struct rescaled_font *r;
+    cairo_font_options_t *options;
+    cairo_status_t status;
+    cairo_matrix_t m;
+    unsigned long i;
+
+    user_font_face = cairo_user_font_face_create ();
+    cairo_user_font_face_set_render_glyph_func (user_font_face, test_scaled_font_render_glyph);
+    cairo_user_font_face_set_unicode_to_glyph_func (user_font_face, test_scaled_font_unicode_to_glyph);
+
+    r = xmalloc (sizeof (struct rescaled_font));
+    r->substitute_font = cairo_font_face_reference (substitute_font);
+
+    /* we don't want any hinting when doing the measuring */
+    options = cairo_font_options_create ();
+    cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_NONE);
+    cairo_font_options_set_hint_metrics (options, CAIRO_HINT_METRICS_OFF);
+
+    cairo_matrix_init_identity (&m);
+
+    r->measuring_font = cairo_scaled_font_create (r->substitute_font,
+						  &m, &m,
+						  options);
+    cairo_font_options_destroy (options);
+
+
+    r->start = glyph_start;
+    r->glyph_count = glyph_count;
+    r->desired_width = xcalloc (sizeof (double), r->glyph_count);
+    r->rescale_factor = xcalloc (sizeof (double), r->glyph_count);
+
+    for (i = 0; i < r->glyph_count; i++) {
+	r->desired_width[i] = desired_width[i];
+	/* use NaN to specify unset */
+	r->rescale_factor[i] = cairo_test_NaN ();
+    }
+
+    status = cairo_font_face_set_user_data (user_font_face,
+					    &rescale_font_closure_key,
+					    r, rescale_font_closure_destroy);
+    if (status) {
+	rescale_font_closure_destroy (r);
+	cairo_font_face_destroy (user_font_face);
+	return status;
+    }
+
+    *out = user_font_face;
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+get_user_font_face (cairo_font_face_t *substitute_font,
+		    const char *text,
+		    cairo_font_face_t *old,
+		    cairo_font_face_t **out)
+{
+    cairo_font_options_t *options;
+    cairo_matrix_t m;
+    cairo_scaled_font_t *measure;
+    int i;
+    double *widths;
+    int count;
+    int num_glyphs;
+    unsigned long min_index, max_index;
+    cairo_status_t status;
+
+    cairo_glyph_t *glyphs = NULL;
+
+    /* we don't want any hinting when doing the measuring */
+    options = cairo_font_options_create ();
+    cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_NONE);
+    cairo_font_options_set_hint_metrics (options, CAIRO_HINT_METRICS_OFF);
+
+    cairo_matrix_init_identity (&m);
+    measure = cairo_scaled_font_create (old, &m, &m, options);
+
+    status = cairo_scaled_font_text_to_glyphs (measure, 0, 0,
+					       text, -1,
+					       &glyphs, &num_glyphs,
+					       NULL, NULL, NULL);
+    cairo_font_options_destroy (options);
+
+    if (status) {
+	cairo_scaled_font_destroy (measure);
+	return status;
+    }
+
+    /* find the glyph range the text covers */
+    max_index = glyphs[0].index;
+    min_index = glyphs[0].index;
+    for (i=0; i<num_glyphs; i++) {
+	if (glyphs[i].index < min_index)
+	    min_index = glyphs[i].index;
+	if (glyphs[i].index > max_index)
+	    max_index = glyphs[i].index;
+    }
+
+    count = max_index - min_index + 1;
+    widths = xcalloc (sizeof (double), count);
+    /* measure all of the necessary glyphs individually */
+    for (i=0; i<num_glyphs; i++) {
+	cairo_text_extents_t extents;
+	cairo_scaled_font_glyph_extents (measure, &glyphs[i], 1, &extents);
+	widths[glyphs[i].index - min_index] = extents.x_advance;
+    }
+
+    status = cairo_scaled_font_status (measure);
+    cairo_scaled_font_destroy (measure);
+    cairo_glyph_free (glyphs);
+
+    if (status == CAIRO_STATUS_SUCCESS) {
+	status = create_rescaled_font (substitute_font,
+				       min_index, count, widths,
+				       out);
+    }
+
+    free (widths);
+    return status;
+}
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_font_extents_t font_extents;
+    cairo_text_extents_t extents;
+    cairo_font_face_t *rescaled;
+    cairo_font_face_t *old;
+    cairo_font_face_t *substitute;
+    const char text[] = TEXT;
+    cairo_status_t status;
+
+    cairo_set_source_rgb (cr, 1, 1, 1);
+    cairo_paint (cr);
+
+    cairo_select_font_face (cr,
+			    CAIRO_TEST_FONT_FAMILY " Sans",
+			    CAIRO_FONT_SLANT_NORMAL,
+			    CAIRO_FONT_WEIGHT_NORMAL);
+
+    cairo_set_font_size (cr, TEXT_SIZE);
+
+    cairo_font_extents (cr, &font_extents);
+    cairo_text_extents (cr, text, &extents);
+
+    cairo_set_source_rgb (cr, 0, 0, 0);
+    cairo_move_to (cr, BORDER, BORDER + font_extents.ascent);
+    cairo_show_text (cr, text);
+
+    /* same text in 'mono' with widths that match the 'sans' version */
+    old = cairo_font_face_reference (cairo_get_font_face (cr));
+    cairo_select_font_face (cr,
+			    CAIRO_TEST_FONT_FAMILY " Sans Mono",
+			    CAIRO_FONT_SLANT_NORMAL,
+			    CAIRO_FONT_WEIGHT_NORMAL);
+    substitute = cairo_get_font_face (cr);
+
+    status = get_user_font_face (substitute, text, old, &rescaled);
+    cairo_font_face_destroy (old);
+    if (status) {
+	return cairo_test_status_from_status (cairo_test_get_context (cr),
+					      status);
+    }
+
+    cairo_set_font_face (cr, rescaled);
+    cairo_font_face_destroy (rescaled);
+
+    cairo_set_source_rgb (cr, 0, 0, 1);
+    cairo_move_to (cr, BORDER, BORDER + font_extents.height + 2*BORDER + font_extents.ascent);
+    cairo_show_text (cr, text);
+
+    /* mono text */
+    cairo_select_font_face (cr,
+			    CAIRO_TEST_FONT_FAMILY " Sans Mono",
+			    CAIRO_FONT_SLANT_NORMAL,
+			    CAIRO_FONT_WEIGHT_NORMAL);
+
+    cairo_set_source_rgb (cr, 0, 0, 1);
+    cairo_move_to (cr, BORDER, BORDER + 2*font_extents.height + 4*BORDER + font_extents.ascent);
+    cairo_show_text (cr, text);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (user_font_rescale,
+	    "Tests drawing text with user defined widths",
+	    "user-font, font", /* keywords */
+	    NULL, /* requirements */
+	    WIDTH, HEIGHT,
+	    NULL, draw)