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[test] Check for errors during ft-show-glyphs-positioning

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Do not blindly assume that we managed to construct a valid scaled-font
before attempting to dereference the FT_Face. Consider a machine with
no fonts which is substituting twin...
This commit is contained in:
Chris Wilson 2009-09-09 09:12:54 +01:00
parent 7fb0d5e209
commit 1820cb7fd6
1 changed files with 39 additions and 7 deletions
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46
test/ft-show-glyphs-positioning.c
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@ -59,10 +59,11 @@ glyph_array_show (glyph_array_t *glyphs, cairo_t *cr)
#define DOUBLE_FROM_26_6(t) ((double)(t) / 64.0)
static void
static cairo_status_t
glyph_array_add_text(glyph_array_t *glyphs, cairo_t *cr, const char *s, double spacing)
{
cairo_scaled_font_t *scaled_font;
cairo_status_t status;
FT_Face face;
unsigned long charcode;
unsigned int index;
@ -73,7 +74,14 @@ glyph_array_add_text(glyph_array_t *glyphs, cairo_t *cr, const char *s, double s
int first = TRUE;
scaled_font = cairo_get_scaled_font (cr);
status = cairo_scaled_font_status (scaled_font);
if (status)
return status;
face = cairo_ft_scaled_font_lock_face (scaled_font);
if (face)
return CAIRO_STATUS_FONT_TYPE_MISMATCH;
p = s;
while (*p)
{
@ -106,13 +114,16 @@ glyph_array_add_text(glyph_array_t *glyphs, cairo_t *cr, const char *s, double s
}
cairo_ft_scaled_font_unlock_face (scaled_font);
return CAIRO_STATUS_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);
glyph_array_t glyphs;
cairo_font_options_t *font_options;
cairo_status_t status;
/* paint white so we don't need separate ref images for
* RGB24 and ARGB32 */
@ -133,19 +144,40 @@ draw (cairo_t *cr, int width, int height)
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
glyph_array_init (&glyphs, 1, TEXT_SIZE);
glyph_array_add_text(&glyphs, cr, "AWAY again", 0.0);
status = glyph_array_add_text(&glyphs, cr, "AWAY again", 0.0);
if (status)
return cairo_test_status_from_status (ctx, status);
glyph_array_rel_move_to (&glyphs, TEXT_SIZE*1, 0.0);
glyph_array_add_text(&glyphs, cr, "character space", TEXT_SIZE*0.3);
status = glyph_array_add_text(&glyphs, cr, "character space", TEXT_SIZE*0.3);
if (status)
return cairo_test_status_from_status (ctx, status);
glyph_array_show (&glyphs, cr);
glyph_array_init (&glyphs, 1, TEXT_SIZE*2 + 4);
glyph_array_add_text(&glyphs, cr, "Increasing", 0.0);
status = glyph_array_add_text(&glyphs, cr, "Increasing", 0.0);
if (status)
return cairo_test_status_from_status (ctx, status);
glyph_array_rel_move_to (&glyphs, TEXT_SIZE*0.5, 0.0);
glyph_array_add_text(&glyphs, cr, "space", 0.0);
status = glyph_array_add_text(&glyphs, cr, "space", 0.0);
if (status)
return cairo_test_status_from_status (ctx, status);
glyph_array_rel_move_to (&glyphs, TEXT_SIZE*1.0, 0.0);
glyph_array_add_text(&glyphs, cr, "between", 0.0);
status = glyph_array_add_text(&glyphs, cr, "between", 0.0);
if (status)
return cairo_test_status_from_status (ctx, status);
glyph_array_rel_move_to (&glyphs, TEXT_SIZE*1.5, 0.0);
glyph_array_add_text(&glyphs, cr, "words", 0.0);
status = glyph_array_add_text(&glyphs, cr, "words", 0.0);
if (status)
return cairo_test_status_from_status (ctx, status);
glyph_array_show (&glyphs, cr);
return CAIRO_TEST_SUCCESS;