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gdi32: Antialias fake bold or italic fonts regardless of GASP table. 

If the client requests a bold typeface of a font which doesn't actually provide
a bold typeface, Wine fakes it using FT_Outline_Embolden().  Likewise, it fakes
italic by apply a shear transform.

These techniques work passably when antialiasing is in effect.  However, when
antialiasing is disabled at small sizes by the font's GASP table, the results
are horrible.  The glyphs have many spurs or appear furry.

On the theory that fonts disable antialiasing via the GASP table at small sizes
because hinting should produce pixel-perfect results and that that rationale is
voided by the application of procedural bolding or italicizing, we ignore the
GASP table and always antialias for fake bold or italic fonts.

There is a new registry setting to disable this and revert to the previous
behavior:

[HKEY_CURRENT_USER\Software\Wine\Fonts]
"AntialiasFakeBoldOrItalic"="n"

Signed-off-by: Ken Thomases <ken@codeweavers.com>
This commit is contained in:
Ken Thomases 2015-09-29 02:27:15 -05:00 committed by Alexandre Julliard
parent 1a45f75ded
commit a05cdaa1b8
1 changed files with 20 additions and 1 deletions
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21
dlls/gdi32/freetype.c
View File

@ -503,6 +503,7 @@ static struct list mappings_list = LIST_INIT( mappings_list );
static UINT default_aa_flags;
static HKEY hkey_font_cache;
static BOOL antialias_fakes = TRUE;
static CRITICAL_SECTION freetype_cs;
static CRITICAL_SECTION_DEBUG critsect_debug =
@ -4143,6 +4144,7 @@ static void reorder_font_list(void)
*/
BOOL WineEngInit(void)
{
HKEY hkey;
DWORD disposition;
HANDLE font_mutex;
@ -4155,6 +4157,23 @@ BOOL WineEngInit(void)
init_fontconfig();
#endif
if (!RegOpenKeyExW(HKEY_CURRENT_USER, wine_fonts_key, 0, KEY_READ, &hkey))
{
static const WCHAR antialias_fake_bold_or_italic[] = { 'A','n','t','i','a','l','i','a','s','F','a','k','e',
'B','o','l','d','O','r','I','t','a','l','i','c',0 };
static const WCHAR true_options[] = { 'y','Y','t','T','1',0 };
DWORD type, size;
WCHAR buffer[20];
size = sizeof(buffer);
if (!RegQueryValueExW(hkey, antialias_fake_bold_or_italic, NULL, &type, (BYTE*)buffer, &size) &&
type == REG_SZ && size >= 1)
{
antialias_fakes = (strchrW(true_options, buffer[0]) != NULL);
}
RegCloseKey(hkey);
}
if((font_mutex = CreateMutexW(NULL, FALSE, font_mutex_nameW)) == NULL)
{
ERR("Failed to create font mutex\n");
@ -5534,7 +5553,7 @@ done:
case GGO_GRAY4_BITMAP:
case GGO_GRAY8_BITMAP:
case WINE_GGO_GRAY16_BITMAP:
if (is_hinting_enabled())
if ((!antialias_fakes || (!ret->fake_bold && !ret->fake_italic)) && is_hinting_enabled())
{
WORD gasp_flags;
if (get_gasp_flags( ret, &gasp_flags ) && !(gasp_flags & GASP_DOGRAY))