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Add user-font-image test
Draws bitmap glyphs using cairo_mask(). This test exposes a bug in the calculation of the glyph extents.
This commit is contained in:
Adrian Johnson
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22e2dac819
commit
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3 changed files with 247 additions and 0 deletions
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@ -184,6 +184,7 @@ unantialiased-shapes$(EXEEXT) \
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unbounded-operator$(EXEEXT) \
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user-data$(EXEEXT) \
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user-font$(EXEEXT) \
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user-font-image$(EXEEXT) \
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user-font-proxy$(EXEEXT) \
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user-font-rescale$(EXEEXT) \
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zero-alpha$(EXEEXT)
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@ -936,6 +937,7 @@ REFERENCE_IMAGES = \
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user-font-ps3-ref.png \
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user-font-svg12-ref.png \
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user-font-svg11-ref.png \
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user-font-image-ref.png \
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user-font-proxy-ref.png \
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user-font-proxy-pdf-ref.png \
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user-font-proxy-ps2-ref.png \
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BIN
test/user-font-image-ref.png
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BIN
test/user-font-image-ref.png
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Binary file not shown.
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After Width: | Height: | Size: 5.4 KiB |
245
test/user-font-image.c
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245
test/user-font-image.c
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@ -0,0 +1,245 @@
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/*
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* Copyright © 2006, 2008 Red Hat, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without
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* fee, provided that the above copyright notice appear in all copies
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* and that both that copyright notice and this permission notice
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* appear in supporting documentation, and that the name of
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* Red Hat, Inc. not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior
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* permission. Red Hat, Inc. makes no representations about the
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* suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
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* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Contributor(s):
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* Kristian Høgsberg <krh@redhat.com>
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* Behdad Esfahbod <behdad@behdad.org>
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* Adrian Johnson <ajohnson@redneon.com>
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include "cairo-test.h"
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/*#define ROTATED 1*/
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#define BORDER 10
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#define TEXT_SIZE 64
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#define WIDTH (TEXT_SIZE * 15 + 2*BORDER)
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#define HEIGHT ((TEXT_SIZE + 2*BORDER)*2)
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#define TEXT "cairo"
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static cairo_test_draw_function_t draw;
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static const cairo_test_t test = {
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"user-font-image",
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"Tests a user-font using bitmap images",
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#ifndef ROTATED
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WIDTH, HEIGHT,
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#else
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WIDTH, WIDTH,
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#endif
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draw
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};
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/* Reverse the bits in a byte with 7 operations (no 64-bit):
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* Devised by Sean Anderson, July 13, 2001.
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* Source: http://graphics.stanford.edu/~seander/bithacks.html#ReverseByteWith32Bits
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*/
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#define CAIRO_BITSWAP8(c) ((((c) * 0x0802LU & 0x22110LU) | ((c) * 0x8020LU & 0x88440LU)) * 0x10101LU >> 16)
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#ifdef WORDS_BIGENDIAN
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#define CAIRO_BITSWAP8_IF_LITTLE_ENDIAN(c) (c)
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#else
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#define CAIRO_BITSWAP8_IF_LITTLE_ENDIAN(c) CAIRO_BITSWAP8(c)
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#endif
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/* Simple glyph definition. data is an 8x8 bitmap.
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*/
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typedef struct {
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unsigned long ucs4;
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int width;
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char data[8];
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} test_scaled_font_glyph_t;
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static cairo_user_data_key_t test_font_face_glyphs_key;
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static cairo_status_t
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test_scaled_font_init (cairo_scaled_font_t *scaled_font,
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cairo_t *cr,
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cairo_font_extents_t *metrics)
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{
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metrics->ascent = 1;
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metrics->descent = 0;
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return CAIRO_STATUS_SUCCESS;
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}
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static cairo_status_t
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test_scaled_font_unicode_to_glyph (cairo_scaled_font_t *scaled_font,
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unsigned long unicode,
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unsigned long *glyph)
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{
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test_scaled_font_glyph_t *glyphs = cairo_font_face_get_user_data (cairo_scaled_font_get_font_face (scaled_font),
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&test_font_face_glyphs_key);
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int i;
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for (i = 0; glyphs[i].ucs4 != (unsigned long) -1; i++)
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if (glyphs[i].ucs4 == unicode) {
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*glyph = i;
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return CAIRO_STATUS_SUCCESS;
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}
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/* Not found. Default to glyph 0 */
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return CAIRO_STATUS_SUCCESS;
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}
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static cairo_status_t
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test_scaled_font_render_glyph (cairo_scaled_font_t *scaled_font,
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unsigned long glyph,
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cairo_t *cr,
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cairo_text_extents_t *metrics)
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{
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test_scaled_font_glyph_t *glyphs = cairo_font_face_get_user_data (cairo_scaled_font_get_font_face (scaled_font),
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&test_font_face_glyphs_key);
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int i;
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unsigned char *data;
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cairo_surface_t *image;
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uint8_t byte;
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/* FIXME: We simply crash on out-of-bound glyph indices */
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metrics->x_advance = (glyphs[glyph].width + 1) / 8.0;
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image = cairo_image_surface_create (CAIRO_FORMAT_A1, glyphs[glyph].width, 8);
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data = cairo_image_surface_get_data (image);
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for (i = 0; i < 8; i++) {
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byte = glyphs[glyph].data[i];
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*data = CAIRO_BITSWAP8_IF_LITTLE_ENDIAN (byte);
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data += cairo_image_surface_get_stride (image);
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}
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cairo_scale (cr, 1.0/8.0, 1.0/8.0);
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cairo_mask_surface (cr, image, 0, -8);
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cairo_surface_destroy (image);
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return CAIRO_STATUS_SUCCESS;
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}
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static cairo_status_t
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_user_font_face_create (cairo_font_face_t **out)
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{
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static const test_scaled_font_glyph_t glyphs [] = {
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{ 'c', 6, { 0x00, 0x38, 0x44, 0x80, 0x80, 0x80, 0x44, 0x38 } },
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{ 'a', 6, { 0x00, 0x70, 0x88, 0x3c, 0x44, 0x84, 0x8c, 0x74 } },
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{ 'i', 1, { 0x80, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80 } },
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{ 'r', 6, { 0x00, 0xb8, 0xc4, 0x80, 0x80, 0x80, 0x80, 0x80 } },
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{ 'o', 7, { 0x00, 0x38, 0x44, 0x82, 0x82, 0x82, 0x44, 0x38 } },
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{ -1, 8, { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } },
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};
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cairo_font_face_t *user_font_face;
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cairo_status_t status;
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user_font_face = cairo_user_font_face_create ();
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cairo_user_font_face_set_init_func (user_font_face, test_scaled_font_init);
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cairo_user_font_face_set_render_glyph_func (user_font_face, test_scaled_font_render_glyph);
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cairo_user_font_face_set_unicode_to_glyph_func (user_font_face, test_scaled_font_unicode_to_glyph);
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status = cairo_font_face_set_user_data (user_font_face,
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&test_font_face_glyphs_key,
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(void*) glyphs, NULL);
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if (status) {
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cairo_font_face_destroy (user_font_face);
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return status;
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}
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*out = user_font_face;
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return CAIRO_STATUS_SUCCESS;
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}
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static cairo_test_status_t
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draw (cairo_t *cr, int width, int height)
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{
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cairo_font_face_t *font_face;
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const char text[] = TEXT;
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cairo_font_extents_t font_extents;
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cairo_text_extents_t extents;
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cairo_status_t status;
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cairo_set_source_rgb (cr, 1, 1, 1);
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cairo_paint (cr);
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#ifdef ROTATED
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cairo_translate (cr, TEXT_SIZE, 0);
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cairo_rotate (cr, .6);
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#endif
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status = _user_font_face_create (&font_face);
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if (status) {
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return cairo_test_status_from_status (cairo_test_get_context (cr),
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status);
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}
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cairo_set_font_face (cr, font_face);
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cairo_font_face_destroy (font_face);
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cairo_set_font_size (cr, TEXT_SIZE);
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cairo_font_extents (cr, &font_extents);
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cairo_text_extents (cr, text, &extents);
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/* logical boundaries in red */
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cairo_move_to (cr, 0, BORDER);
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cairo_rel_line_to (cr, WIDTH, 0);
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cairo_move_to (cr, 0, BORDER + font_extents.ascent);
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cairo_rel_line_to (cr, WIDTH, 0);
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cairo_move_to (cr, 0, BORDER + font_extents.ascent + font_extents.descent);
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cairo_rel_line_to (cr, WIDTH, 0);
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cairo_move_to (cr, BORDER, 0);
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cairo_rel_line_to (cr, 0, 2*BORDER + TEXT_SIZE);
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cairo_move_to (cr, BORDER + extents.x_advance, 0);
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cairo_rel_line_to (cr, 0, 2*BORDER + TEXT_SIZE);
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cairo_set_source_rgb (cr, 1, 0, 0);
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cairo_set_line_width (cr, 2);
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cairo_stroke (cr);
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/* ink boundaries in green */
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cairo_rectangle (cr,
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BORDER + extents.x_bearing, BORDER + font_extents.ascent + extents.y_bearing,
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extents.width, extents.height);
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cairo_set_source_rgb (cr, 0, 1, 0);
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cairo_set_line_width (cr, 2);
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cairo_stroke (cr);
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/* text in black */
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cairo_set_source_rgb (cr, 0, 0, 0);
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cairo_move_to (cr, BORDER, BORDER + font_extents.ascent);
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cairo_show_text (cr, text);
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/* filled version of text in blue */
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cairo_set_source_rgb (cr, 0, 0, 1);
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cairo_move_to (cr, BORDER, BORDER + font_extents.height + 2*BORDER + font_extents.ascent);
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cairo_text_path (cr, text);
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cairo_fill (cr);
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return CAIRO_TEST_SUCCESS;
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}
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int
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main (void)
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{
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return cairo_test (&test);
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}
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