diff options
Diffstat (limited to 'libs/cairo-1.16.0/test/font-matrix-translation.c')
| -rw-r--r-- | libs/cairo-1.16.0/test/font-matrix-translation.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/font-matrix-translation.c b/libs/cairo-1.16.0/test/font-matrix-translation.c new file mode 100644 index 0000000..465ac7c --- /dev/null +++ b/libs/cairo-1.16.0/test/font-matrix-translation.c @@ -0,0 +1,141 @@ +/* + * Copyright © 2006 Red Hat, Inc. + * + * 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 + * Red Hat, Inc. not be used in advertising or publicity pertaining to + * distribution of the software without specific, written prior + * permission. Red Hat, Inc. makes no representations about the + * suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS + * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS, IN NO EVENT SHALL RED HAT, INC. 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@cworth.org> + */ + +#include "cairo-test.h" + +#define TEXT_SIZE 12 +#define PAD 4 +#define TEXT "text" + +static cairo_bool_t +text_extents_equal (const cairo_text_extents_t *A, + const cairo_text_extents_t *B) +{ + return A->x_bearing == B->x_bearing && + A->y_bearing == B->y_bearing && + A->width == B->width && + A->height == B->height && + A->x_advance == B->x_advance && + A->y_advance == B->y_advance; +} + +static cairo_test_status_t +box_text (const cairo_test_context_t *ctx, cairo_t *cr, + const char *utf8, + double x, double y) +{ + double line_width; + cairo_text_extents_t extents = {0}, scaled_extents = {0}; + cairo_scaled_font_t *scaled_font; + cairo_status_t status; + + cairo_save (cr); + + cairo_text_extents (cr, utf8, &extents); + + scaled_font = cairo_get_scaled_font (cr); + cairo_scaled_font_text_extents (scaled_font, TEXT, &scaled_extents); + status = cairo_scaled_font_status (scaled_font); + if (status) + return cairo_test_status_from_status (ctx, status); + + if (! text_extents_equal (&extents, &scaled_extents)) { + cairo_test_log (ctx, + "Error: extents differ when they shouldn't:\n" + "cairo_text_extents(); extents (%g, %g, %g, %g, %g, %g)\n" + "cairo_scaled_font_text_extents(); extents (%g, %g, %g, %g, %g, %g)\n", + extents.x_bearing, extents.y_bearing, + extents.width, extents.height, + extents.x_advance, extents.y_advance, + scaled_extents.x_bearing, scaled_extents.y_bearing, + scaled_extents.width, scaled_extents.height, + scaled_extents.x_advance, scaled_extents.y_advance); + return CAIRO_TEST_FAILURE; + } + + line_width = cairo_get_line_width (cr); + cairo_rectangle (cr, + x + extents.x_bearing - line_width / 2, + y + extents.y_bearing - line_width / 2, + extents.width + line_width, + extents.height + line_width); + cairo_stroke (cr); + + cairo_move_to (cr, x, y); + cairo_show_text (cr, utf8); + + cairo_restore (cr); + + return CAIRO_TEST_SUCCESS; +} + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + const cairo_test_context_t *ctx = cairo_test_get_context (cr); + cairo_test_status_t status; + cairo_text_extents_t extents; + cairo_matrix_t matrix; + + cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */ + 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_translate (cr, PAD, PAD); + cairo_set_line_width (cr, 1.0); + + cairo_text_extents (cr, TEXT, &extents); + + /* Draw text and bounding box */ + cairo_set_source_rgb (cr, 0, 0, 0); /* black */ + status = box_text (ctx, cr, TEXT, 0, - extents.y_bearing); + if (status) + return status; + + /* Then draw again with the same coordinates, but with a font + * matrix to position the text below and shifted a bit to the + * right. */ + cairo_matrix_init_translate (&matrix, TEXT_SIZE / 2, TEXT_SIZE + PAD); + cairo_matrix_scale (&matrix, TEXT_SIZE, TEXT_SIZE); + cairo_set_font_matrix (cr, &matrix); + + cairo_set_source_rgb (cr, 0, 0, 1); /* blue */ + status = box_text (ctx, cr, TEXT, 0, - extents.y_bearing); + if (status) + return status; + + return CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (font_matrix_translation, + "Test that translation in a font matrix can be used to offset a string", + "font", /* keywords */ + NULL, /* requirements */ + 38, 34, + NULL, draw) |