[packages/ImageMagick] Rel 2. Fix autotrace SVG writer: call autotrace_init() (0-byte output) and scale Q16 samples to 8 bi

[arekm]

commit 87ae0deddb8963e457d57ca7263e717d2273c6ca
Author: Arkadiusz Miśkiewicz <arekm at maven.pl>
Date:   Thu Oct 15 21:50:21 2026 +0200

    Rel 2. Fix autotrace SVG writer: call autotrace_init() (0-byte output) and scale Q16 samples to 8 bits

 ImageMagick-autotrace-init.patch    | 11 +++++++++++
 ImageMagick-autotrace-quantum.patch | 18 ++++++++++++++++++
 ImageMagick.spec                    |  6 +++++-
 3 files changed, 34 insertions(+), 1 deletion(-)
---
diff --git a/ImageMagick.spec b/ImageMagick.spec
index 73e19fb..526ff9c 100644
--- a/ImageMagick.spec
+++ b/ImageMagick.spec
@@ -41,7 +41,7 @@ Summary(tr.UTF-8):	X altında resim gösterme, çevirme ve değişiklik yapma
 Summary(uk.UTF-8):	Перегляд, конвертування та обробка зображень під X Window
 Name:		ImageMagick
 Version:	%{ver}%{?pver:.%{pver}}
-Release:	1
+Release:	2
 Epoch:		1
 License:	Apache-like
 Group:		X11/Applications/Graphics
@@ -52,6 +52,8 @@ Patch2:		%{name}-libpath.patch
 Patch3:		%{name}-ldflags.patch
 Patch4:		%{name}-lt.patch
 Patch5:		%{name}-OpenCL.patch
+Patch6:		%{name}-autotrace-init.patch
+Patch7:		%{name}-autotrace-quantum.patch
 URL:		https://imagemagick.org/
 %{?with_opencl:BuildRequires:	OpenCL-devel}
 %{?with_exr:BuildRequires:	OpenEXR-devel >= 1.0.6}
@@ -769,6 +771,8 @@ Moduł kodera dla plików WMF.
 %patch -P3 -p1
 %patch -P4 -p1
 %patch -P5 -p1
+%patch -P6 -p1
+%patch -P7 -p1
 
 find -type f | xargs grep -l '/usr/local/bin/perl' | xargs %{__sed} -i -e 's=!/usr/local/bin/perl=!%{__perl}='
 
diff --git a/ImageMagick-autotrace-init.patch b/ImageMagick-autotrace-init.patch
new file mode 100644
index 0000000..5993299
--- /dev/null
+++ b/ImageMagick-autotrace-init.patch
@@ -0,0 +1,11 @@
+# autotrace registers its output writers only in autotrace_init(); without it the svg handler lookup fails and a 0-byte file is written
+--- ImageMagick-7.1.2-34/coders/svg.c.orig
++++ ImageMagick-7.1.2-34/coders/svg.c
+@@ -3705,6 +3705,7 @@
+     /*
+       Trace image and write as SVG.
+     */
++    autotrace_init();
+     fitting_options=at_fitting_opts_new();
+     output_options=at_output_opts_new();
+     number_planes=3;
diff --git a/ImageMagick-autotrace-quantum.patch b/ImageMagick-autotrace-quantum.patch
new file mode 100644
index 0000000..e22aca6
--- /dev/null
+++ b/ImageMagick-autotrace-quantum.patch
@@ -0,0 +1,18 @@
+# at_bitmap holds 8-bit samples; storing a raw Q16 Quantum keeps only its low byte
+--- ImageMagick-7.1.2-34/coders/svg.c.orig
++++ ImageMagick-7.1.2-34/coders/svg.c
+@@ -3720,11 +3720,11 @@
+         break;
+       for (x=0; x < (ssize_t) image->columns; x++)
+       {
+-        trace->bitmap[i++]=GetPixelRed(image,p);
++        trace->bitmap[i++]=ScaleQuantumToChar(GetPixelRed(image,p));
+         if (number_planes == 3)
+           {
+-            trace->bitmap[i++]=GetPixelGreen(image,p);
+-            trace->bitmap[i++]=GetPixelBlue(image,p);
++            trace->bitmap[i++]=ScaleQuantumToChar(GetPixelGreen(image,p));
++            trace->bitmap[i++]=ScaleQuantumToChar(GetPixelBlue(image,p));
+           }
+         p+=(ptrdiff_t) GetPixelChannels(image);
+       }
================================================================

---- gitweb:

http://git.pld-linux.org/gitweb.cgi/packages/ImageMagick.git/commitdiff/87ae0deddb8963e457d57ca7263e717d2273c6ca