[OpenJDK 2D-Dev] [11] Cannot use italic font style with MS Gothic and MS Mincho fonts
Ichiroh Takiguchi
takiguc at linux.vnet.ibm.com
Fri Jul 27 11:22:44 UTC 2018
Hello.
According to my investigation, FT_Render_Glyph() was not called
even if FT_GlyphSlot_Oblique() was called.
=========
if (ftglyph->format == FT_GLYPH_FORMAT_OUTLINE) {
FT_Render_Glyph(ftglyph, FT_LOAD_TARGET_MODE(target)); <<===
}
=========
It seemed FT_Load_Glyph() and renderFlags affected this issue.
On my Windows,
For "MS Mincho" with italic, renderFlags was "FT_LOAD_TARGET_MONO |
FT_LOAD_NO_BITMAP | FT_LOAD_RENDER".
I also tested "Meiryo" font (it could handle italic style)
For "Meiryo" with italic, renderFlags was "FT_LOAD_TARGET_MONO |
FT_LOAD_RENDER".
I think, after FT_LOAD_NO_BITMAP is turned on, FT_LOAD_RENDER should be
turned off.
So how about following fix ?
=========
diff -r 1edcf36fe15f
src/java.desktop/share/native/libfontmanager/freetypeScaler.c
--- a/src/java.desktop/share/native/libfontmanager/freetypeScaler.c Wed
Jul 18 11:57:51 2018 -0400
+++ b/src/java.desktop/share/native/libfontmanager/freetypeScaler.c Fri
Jul 27 19:44:12 2018 +0900
@@ -700,6 +700,9 @@
if (!context->useSbits) {
renderFlags |= FT_LOAD_NO_BITMAP;
+ if (context->doBold || context->doItalize) {
+ renderFlags &= ~FT_LOAD_RENDER;
+ }
}
/* NB: in case of non identity transform
=========
On 2018-07-25 19:29, Ichiroh Takiguchi wrote:
> Hello.
> I'm using jdk-11+23 build on Japanese Windows 7.
>
> I ran Font2DTest Demo, then select like:
> Font: MS Mincho
> Range: Basic Latin
> Method: drawString
> Size: 24
> Style: Italic
>
> But style was not changed to Italic.
> Antialiasing and Fractional Metrics did not affect this issue.
>
> I assume it's side-effect for:
> 8204929: Fonts with embedded bitmaps are not always rotated
>
> Could you check it ?
>
> Thanks,
> Ichiroh Takiguchi
> IBM Japan, Ltd.
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