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styleproperty: dump image surfaces as PNG data URLs

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We're not able to load that (yet?), but it's useful for producing
diffable test dumps.
This commit is contained in:
Benjamin Otte 2011-07-21 00:43:00 +02:00
parent db66618227
commit 5a1e1579b3
1 changed files with 67 additions and 1 deletions
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68
gtk/gtkstyleproperty.c
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@ -948,6 +948,72 @@ pattern_value_parse (GtkCssParser *parser,
return TRUE;
}
static cairo_status_t
surface_write (void *closure,
const unsigned char *data,
unsigned int length)
{
g_byte_array_append (closure, data, length);
return CAIRO_STATUS_SUCCESS;
}
static void
surface_print (cairo_surface_t *surface,
GString * string)
{
#if CAIRO_HAS_PNG_FUNCTIONS
GByteArray *array;
char *base64;
array = g_byte_array_new ();
cairo_surface_write_to_png_stream (surface, surface_write, array);
base64 = g_base64_encode (array->data, array->len);
g_byte_array_free (array, TRUE);
g_string_append (string, "url(\"data:image/png;base64,");
g_string_append (string, base64);
g_string_append (string, "\")");
g_free (base64);
#else
g_string_append (string, "none /* you need cairo png functions enabled to make this work */");
#endif
}
static void
pattern_value_print (const GValue *value,
GString *string)
{
cairo_pattern_t *pattern;
cairo_surface_t *surface;
pattern = g_value_get_boxed (value);
if (pattern == NULL)
{
g_string_append (string, "none");
return;
}
switch (cairo_pattern_get_type (pattern))
{
case CAIRO_PATTERN_TYPE_SURFACE:
if (cairo_pattern_get_surface (pattern, &surface) != CAIRO_STATUS_SUCCESS)
{
g_assert_not_reached ();
}
surface_print (surface, string);
break;
case CAIRO_PATTERN_TYPE_SOLID:
case CAIRO_PATTERN_TYPE_LINEAR:
case CAIRO_PATTERN_TYPE_RADIAL:
default:
g_assert_not_reached ();
break;
}
}
static gboolean
shadow_value_parse (GtkCssParser *parser,
GFile *base,
@ -2138,7 +2204,7 @@ css_string_funcs_init (void)
gradient_value_print);
register_conversion_function (CAIRO_GOBJECT_TYPE_PATTERN,
pattern_value_parse,
NULL);
pattern_value_print);
register_conversion_function (GTK_TYPE_BORDER_IMAGE,
border_image_value_parse,
NULL);