Your message dated Thu, 23 May 2019 10:41:18 +0200
with message-id <[email protected]>
and subject line Re: Bug#929422: unblock: ghostscript/9.27~dfsg-2
has caused the Debian Bug report #929422,
regarding unblock: ghostscript/9.27~dfsg-2
to be marked as done.
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--
929422: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=929422
Debian Bug Tracking System
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--- Begin Message ---
Package: release.debian.org
Severity: normal
User: [email protected]
Usertags: unblock
Please unblock package ghostscript
Upstream regression in 9.27 was fixed in ghostscript/9.27~dfsg-2
with cherrypicking almost 50 lines of code, debdiff attached.
diff -Nru ghostscript-9.27~dfsg/debian/changelog
ghostscript-9.27~dfsg/debian/changelog
--- ghostscript-9.27~dfsg/debian/changelog 2019-04-05 03:17:20.000000000
+0900
+++ ghostscript-9.27~dfsg/debian/changelog 2019-04-20 17:16:50.000000000
+0900
@@ -1,3 +1,11 @@
+ghostscript (9.27~dfsg-2) unstable; urgency=medium
+
+ * Add patch cherry-picked upstream
+ to fix regression resolving bounding box of font glyphs.
+ Closes: Bug#927429. Thanks to Kenshi Muto.
+
+ -- Jonas Smedegaard <[email protected]> Sat, 20 Apr 2019 10:16:50 +0200
+
ghostscript (9.27~dfsg-1) unstable; urgency=high
[ upstream ]
diff -Nru ghostscript-9.27~dfsg/debian/patches/020190410~06c9207.patch
ghostscript-9.27~dfsg/debian/patches/020190410~06c9207.patch
--- ghostscript-9.27~dfsg/debian/patches/020190410~06c9207.patch
1970-01-01 09:00:00.000000000 +0900
+++ ghostscript-9.27~dfsg/debian/patches/020190410~06c9207.patch
2019-04-20 17:15:04.000000000 +0900
@@ -0,0 +1,91 @@
+Description: Fix regression resolving bounding box of font glyphs
+ Re-introduce over/underflow workaround
+ .
+ Commit 355434f4b1bbe8c4f98cafad5a6868aa2f0eaae1 reverted a workaround
+ that compensated for over/underflow in Freetype's TTF hinting
+ (related to freedom and projection vector calculations).
+ That problem no longer exists in recent Freetype releases,
+ and the workaround actually caused other issues to occur with hinting.
+ .
+ What wasn't obvious was
+ that the workaround also protected over/underflow issues
+ relating to the unitsPerEm value.
+ .
+ So this re-instates the workaround,
+ but bases the decision on how the final scale is distributing
+ between the Freetype "size" and the Freetype matrix
+ on the unitsPerEm value
+ (this is relevant for all font types
+ as for non-TTF font types
+ Freetype derives the unitsPerEm from the FontMatrix for PS type fonts).
+Origin: upstream, http://git.ghostscript.com/?p=ghostpdl.git;h=06c9207
+Author: Chris Liddell <[email protected]>
+Forwarded: yes
+Bug: http://bugs.ghostscript.com/show_bug.cgi?id=700952
+Bug: http://bugs.ghostscript.com/show_bug.cgi?id=700875
+Bug-Debian: https://bugs.debian.org/927429
+Last-Update: 2019-04-20
+---
+This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
+--- a/base/fapi_ft.c
++++ b/base/fapi_ft.c
+@@ -974,13 +974,19 @@
+ */
+ static void
+ transform_decompose(FT_Matrix * a_transform, FT_UInt * xresp, FT_UInt * yresp,
+- FT_Fixed * a_x_scale, FT_Fixed * a_y_scale)
++ FT_Fixed * a_x_scale, FT_Fixed * a_y_scale, int
units_per_EM)
+ {
+ double scalex, scaley, fact = 1.0;
+ double factx = 1.0, facty = 1.0;
+ FT_Matrix ftscale_mat;
+ FT_UInt xres;
+ FT_UInt yres;
++ /* We have to account for units_per_EM as we fiddle with the scaling
++ * in order to avoid underflow (mostly in the TTF hinting code), but
++ * we also want to clamp to a lower value (512, admittedly arrived at
++ * via experimentation) in order to preserve the fidelity of the outlines.
++ */
++ double upe = units_per_EM > 512 ? (float)units_per_EM : 512.0;
+
+ scalex = hypot((double)a_transform->xx, (double)a_transform->xy);
+ scaley = hypot((double)a_transform->yx, (double)a_transform->yy);
+@@ -1067,10 +1073,25 @@
+ scalex *= fact;
+ }
+
+- ftscale_mat.xx = (FT_Fixed) (65536.0 / scalex);
+- ftscale_mat.xy = (FT_Fixed) 0;
+- ftscale_mat.yx = (FT_Fixed) 0;
+- ftscale_mat.yy = (FT_Fixed) (65536.0 / scaley);
++ /* see above */
++ fact = 1.0;
++ while (scaley * yres > (double)upe * 72.0 && (xres > 0 && yres > 0)
++ && (scalex > 0.0 && scaley > 0.0)) {
++ if (scaley < yres) {
++ xres >>= 1;
++ yres >>= 1;
++ fact *= 2.0;
++ }
++ else {
++ scalex /= 1.25;
++ scaley /= 1.25;
++ }
++ }
++
++ ftscale_mat.xx = (FT_Fixed) ((65536.0 / scalex) * fact);
++ ftscale_mat.xy = 0;
++ ftscale_mat.yx = 0;
++ ftscale_mat.yy = (FT_Fixed) ((65536.0 / scaley) * fact);
+
+ FT_Matrix_Multiply(a_transform, &ftscale_mat);
+ memcpy(a_transform, &ftscale_mat, sizeof(FT_Matrix));
+@@ -1315,7 +1336,7 @@
+ * transform.
+ */
+ transform_decompose(&face->ft_transform, &face->horz_res,
+- &face->vert_res, &face->width, &face->height);
++ &face->vert_res, &face->width, &face->height,
face->ft_face->units_per_EM);
+
+ ft_error = FT_Set_Char_Size(face->ft_face, face->width, face->height,
+ face->horz_res, face->vert_res);
diff -Nru ghostscript-9.27~dfsg/debian/patches/series
ghostscript-9.27~dfsg/debian/patches/series
--- ghostscript-9.27~dfsg/debian/patches/series 2019-04-05 01:39:06.000000000
+0900
+++ ghostscript-9.27~dfsg/debian/patches/series 2019-04-20 17:09:53.000000000
+0900
@@ -1,3 +1,4 @@
+020190410~06c9207.patch
2001_docdir_fix_for_debian.patch
2002_gs_man_fix_debian.patch
2003_support_multiarch.patch
unblock ghostscript/9.27~dfsg-2
--- End Message ---
--- Begin Message ---
Hi
On 23-05-2019 10:29, Hideki Yamane wrote:
> Please unblock package ghostscript
Unblocked, thanks.
And just for the future, it helps to have the meta data of the bug
correct. Please use the right severity of your bugs, you just filed this
as "normal".
Paul
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--- End Message ---
