Commit 66727d800 for imagemagick.org
commit 66727d8006966bd9640f8b2e0d9e0ca257027f7e
Author: Madan mohan Manokar <madanmohan.manokar@amd.com>
Date: Tue Nov 3 19:56:15 2026 +0530
MagickCore: do not clip new resize rows against uninitialized memory (#9083)
With mask_trait set to UpdatePixelTrait, each row sync in ResizeImage
runs ClipPixelCacheNexus, which blends partially masked pixels against
the uninitialized contents of the new canvas. The output then varies
with heap contents, for example under MALLOC_PERTURB_.
Clear mask_trait while the filters write; the filter loop already uses
the mask to choose between filtering and copying each pixel.
Add tests/resize-filter-pixels, which compares every Lanczos sample of
RGB, RGBA, grayscale, CMYK, channel-masked and write-masked resizes
with a stored Q16 non-HDRI reference. The write-mask case fails
without this change.
Co-authored-by: Cristy <12486802+urban-warrior@users.noreply.github.com>
diff --git a/MagickCore/resize.c b/MagickCore/resize.c
index 18c949408..7f64da7d2 100644
--- a/MagickCore/resize.c
+++ b/MagickCore/resize.c
@@ -3864,10 +3864,11 @@ MagickExport Image *ResizeImage(const Image *image,const size_t columns,
return(DestroyImage(resize_image));
}
/*
- Resize image.
+ Resize image. A new canvas has no pixels to protect, so do not clip these
+ rows against uninitialized cache memory.
*/
- filter_image->mask_trait=UpdatePixelTrait;
- resize_image->mask_trait=UpdatePixelTrait;
+ filter_image->mask_trait=UndefinedPixelTrait;
+ resize_image->mask_trait=UndefinedPixelTrait;
offset=0;
if (x_factor > y_factor)
{
diff --git a/Makefile.in b/Makefile.in
index 859878917..60944f445 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -333,7 +333,7 @@ am__installdirs = "$(DESTDIR)$(bindir)" "$(DESTDIR)$(codersdir)" \
"$(DESTDIR)$(MagickWandincdir)" "$(DESTDIR)$(includedir)" \
"$(DESTDIR)$(magickppincdir)" "$(DESTDIR)$(magickpptopincdir)"
am__EXEEXT_2 = tests/validate$(EXEEXT) tests/drawtest$(EXEEXT) \
- tests/wandtest$(EXEEXT)
+ tests/wandtest$(EXEEXT) tests/resize-filter-pixels$(EXEEXT)
am__EXEEXT_3 = Magick++/demo/analyze$(EXEEXT) \
Magick++/demo/button$(EXEEXT) Magick++/demo/demo$(EXEEXT) \
Magick++/demo/detrans$(EXEEXT) Magick++/demo/flip$(EXEEXT) \
@@ -2165,6 +2165,16 @@ tests_drawtest_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC \
$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=link $(CCLD) \
$(AM_CFLAGS) $(CFLAGS) $(tests_drawtest_LDFLAGS) $(LDFLAGS) -o \
$@
+am_tests_resize_filter_pixels_OBJECTS = \
+ tests/resize_filter_pixels-resize-filter-pixels.$(OBJEXT)
+tests_resize_filter_pixels_OBJECTS = \
+ $(am_tests_resize_filter_pixels_OBJECTS)
+tests_resize_filter_pixels_DEPENDENCIES = $(MAGICKCORE_LIBS) \
+ $(am__DEPENDENCIES_1)
+tests_resize_filter_pixels_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC \
+ $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=link $(CCLD) \
+ $(AM_CFLAGS) $(CFLAGS) $(tests_resize_filter_pixels_LDFLAGS) \
+ $(LDFLAGS) -o $@
am_tests_validate_OBJECTS = tests/validate-validate.$(OBJEXT)
tests_validate_OBJECTS = $(am_tests_validate_OBJECTS)
tests_validate_DEPENDENCIES = $(MAGICKCORE_LIBS) $(MAGICKWAND_LIBS) \
@@ -2657,6 +2667,7 @@ am__depfiles_remade = ./$(DEPDIR)/dummy.Po \
filters/$(DEPDIR)/MagickCore_libMagickCore_@MAGICK_MAJOR_VERSION@_@MAGICK_ABI_SUFFIX@_la-analyze.Plo \
filters/$(DEPDIR)/analyze_la-analyze.Plo \
tests/$(DEPDIR)/drawtest-drawtest.Po \
+ tests/$(DEPDIR)/resize_filter_pixels-resize-filter-pixels.Po \
tests/$(DEPDIR)/validate-validate.Po \
tests/$(DEPDIR)/wandtest-wandtest.Po \
utilities/$(DEPDIR)/magick.Po
@@ -2793,8 +2804,10 @@ SOURCES = $(Magick___lib_libMagick___@MAGICK_MAJOR_VERSION@_@MAGICK_ABI_SUFFIX@_
$(Magick___tests_morphImages_SOURCES) \
$(Magick___tests_readWriteBlob_SOURCES) \
$(Magick___tests_readWriteImages_SOURCES) \
- $(tests_drawtest_SOURCES) $(tests_validate_SOURCES) \
- $(tests_wandtest_SOURCES) $(utilities_magick_SOURCES) \
+ $(tests_drawtest_SOURCES) \
+ $(tests_resize_filter_pixels_SOURCES) \
+ $(tests_validate_SOURCES) $(tests_wandtest_SOURCES) \
+ $(utilities_magick_SOURCES) \
$(nodist_EXTRA_utilities_magick_SOURCES)
DIST_SOURCES = $(Magick___lib_libMagick___@MAGICK_MAJOR_VERSION@_@MAGICK_ABI_SUFFIX@_la_SOURCES) \
$(am__MagickCore_libMagickCore_@MAGICK_MAJOR_VERSION@_@MAGICK_ABI_SUFFIX@_la_SOURCES_DIST) \
@@ -2891,8 +2904,10 @@ DIST_SOURCES = $(Magick___lib_libMagick___@MAGICK_MAJOR_VERSION@_@MAGICK_ABI_SUF
$(Magick___tests_morphImages_SOURCES) \
$(Magick___tests_readWriteBlob_SOURCES) \
$(Magick___tests_readWriteImages_SOURCES) \
- $(tests_drawtest_SOURCES) $(tests_validate_SOURCES) \
- $(tests_wandtest_SOURCES) $(am__utilities_magick_SOURCES_DIST)
+ $(tests_drawtest_SOURCES) \
+ $(tests_resize_filter_pixels_SOURCES) \
+ $(tests_validate_SOURCES) $(tests_wandtest_SOURCES) \
+ $(am__utilities_magick_SOURCES_DIST)
am__can_run_installinfo = \
case $$AM_UPDATE_INFO_DIR in \
n|no|NO) false;; \
@@ -6255,7 +6270,8 @@ TESTS_CPPFLAGS = $(AM_CPPFLAGS)
TESTS_CHECK_PGRMS = \
tests/validate \
tests/drawtest \
- tests/wandtest
+ tests/wandtest \
+ tests/resize-filter-pixels
tests_validate_SOURCES = tests/validate.c tests/validate.h
tests_validate_CPPFLAGS = $(TESTS_CPPFLAGS)
@@ -6269,6 +6285,10 @@ tests_wandtest_SOURCES = tests/wandtest.c
tests_wandtest_CPPFLAGS = $(TESTS_CPPFLAGS)
tests_wandtest_LDFLAGS = $(LDFLAGS)
tests_wandtest_LDADD = $(MAGICKCORE_LIBS) $(MAGICKWAND_LIBS)
+tests_resize_filter_pixels_SOURCES = tests/resize-filter-pixels.c
+tests_resize_filter_pixels_CPPFLAGS = $(TESTS_CPPFLAGS)
+tests_resize_filter_pixels_LDFLAGS = $(LDFLAGS)
+tests_resize_filter_pixels_LDADD = $(MAGICKCORE_LIBS) $(MATH_LIBS)
TESTS_XFAIL_TESTS =
TESTS_TESTS = \
tests/cli-colorspace.tap \
@@ -6295,6 +6315,7 @@ TESTS_TESTS = \
tests/validate-montage.tap \
tests/validate-stream.tap \
tests/drawtest.tap \
+ tests/resize-filter-pixels.tap \
tests/wandtest.tap
TESTS_EXTRA_DIST = \
@@ -6308,10 +6329,12 @@ TESTS_EXTRA_DIST = \
tests/input_gray.miff \
tests/input_truecolor.miff \
tests/sequence.miff \
+ tests/resize-filter-pixels.q16.txt \
$(TESTS_TESTS)
TESTS_CLEANFILES = \
- tests/*_out.*
+ tests/*_out.* \
+ tests/resize-filter-pixels.out
@WITH_PERL_TRUE@PERLMAGICK = PerlMagick
@WITH_PERL_TRUE@PERLMAKEMAKER = $(PERLMAGICK)/Makefile.PL
@@ -8337,6 +8360,12 @@ tests/drawtest-drawtest.$(OBJEXT): tests/$(am__dirstamp) \
tests/drawtest$(EXEEXT): $(tests_drawtest_OBJECTS) $(tests_drawtest_DEPENDENCIES) $(EXTRA_tests_drawtest_DEPENDENCIES) tests/$(am__dirstamp)
@rm -f tests/drawtest$(EXEEXT)
$(AM_V_CCLD)$(tests_drawtest_LINK) $(tests_drawtest_OBJECTS) $(tests_drawtest_LDADD) $(LIBS)
+tests/resize_filter_pixels-resize-filter-pixels.$(OBJEXT): \
+ tests/$(am__dirstamp) tests/$(DEPDIR)/$(am__dirstamp)
+
+tests/resize-filter-pixels$(EXEEXT): $(tests_resize_filter_pixels_OBJECTS) $(tests_resize_filter_pixels_DEPENDENCIES) $(EXTRA_tests_resize_filter_pixels_DEPENDENCIES) tests/$(am__dirstamp)
+ @rm -f tests/resize-filter-pixels$(EXEEXT)
+ $(AM_V_CCLD)$(tests_resize_filter_pixels_LINK) $(tests_resize_filter_pixels_OBJECTS) $(tests_resize_filter_pixels_LDADD) $(LIBS)
tests/validate-validate.$(OBJEXT): tests/$(am__dirstamp) \
tests/$(DEPDIR)/$(am__dirstamp)
@@ -8871,6 +8900,7 @@ distclean-compile:
@AMDEP_TRUE@@am__include@ @am__quote@filters/$(DEPDIR)/MagickCore_libMagickCore_@MAGICK_MAJOR_VERSION@_@MAGICK_ABI_SUFFIX@_la-analyze.Plo@am__quote@ # am--include-marker
@AMDEP_TRUE@@am__include@ @am__quote@filters/$(DEPDIR)/analyze_la-analyze.Plo@am__quote@ # am--include-marker
@AMDEP_TRUE@@am__include@ @am__quote@tests/$(DEPDIR)/drawtest-drawtest.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@tests/$(DEPDIR)/resize_filter_pixels-resize-filter-pixels.Po@am__quote@ # am--include-marker
@AMDEP_TRUE@@am__include@ @am__quote@tests/$(DEPDIR)/validate-validate.Po@am__quote@ # am--include-marker
@AMDEP_TRUE@@am__include@ @am__quote@tests/$(DEPDIR)/wandtest-wandtest.Po@am__quote@ # am--include-marker
@AMDEP_TRUE@@am__include@ @am__quote@utilities/$(DEPDIR)/magick.Po@am__quote@ # am--include-marker
@@ -11796,6 +11826,20 @@ tests/drawtest-drawtest.obj: tests/drawtest.c
@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
@am__fastdepCC_FALSE@ $(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(tests_drawtest_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o tests/drawtest-drawtest.obj `if test -f 'tests/drawtest.c'; then $(CYGPATH_W) 'tests/drawtest.c'; else $(CYGPATH_W) '$(srcdir)/tests/drawtest.c'; fi`
+tests/resize_filter_pixels-resize-filter-pixels.o: tests/resize-filter-pixels.c
+@am__fastdepCC_TRUE@ $(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(tests_resize_filter_pixels_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT tests/resize_filter_pixels-resize-filter-pixels.o -MD -MP -MF tests/$(DEPDIR)/resize_filter_pixels-resize-filter-pixels.Tpo -c -o tests/resize_filter_pixels-resize-filter-pixels.o `test -f 'tests/resize-filter-pixels.c' || echo '$(srcdir)/'`tests/resize-filter-pixels.c
+@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) tests/$(DEPDIR)/resize_filter_pixels-resize-filter-pixels.Tpo tests/$(DEPDIR)/resize_filter_pixels-resize-filter-pixels.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@ $(AM_V_CC)source='tests/resize-filter-pixels.c' object='tests/resize_filter_pixels-resize-filter-pixels.o' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@ $(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(tests_resize_filter_pixels_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o tests/resize_filter_pixels-resize-filter-pixels.o `test -f 'tests/resize-filter-pixels.c' || echo '$(srcdir)/'`tests/resize-filter-pixels.c
+
+tests/resize_filter_pixels-resize-filter-pixels.obj: tests/resize-filter-pixels.c
+@am__fastdepCC_TRUE@ $(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(tests_resize_filter_pixels_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT tests/resize_filter_pixels-resize-filter-pixels.obj -MD -MP -MF tests/$(DEPDIR)/resize_filter_pixels-resize-filter-pixels.Tpo -c -o tests/resize_filter_pixels-resize-filter-pixels.obj `if test -f 'tests/resize-filter-pixels.c'; then $(CYGPATH_W) 'tests/resize-filter-pixels.c'; else $(CYGPATH_W) '$(srcdir)/tests/resize-filter-pixels.c'; fi`
+@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) tests/$(DEPDIR)/resize_filter_pixels-resize-filter-pixels.Tpo tests/$(DEPDIR)/resize_filter_pixels-resize-filter-pixels.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@ $(AM_V_CC)source='tests/resize-filter-pixels.c' object='tests/resize_filter_pixels-resize-filter-pixels.obj' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@ $(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(tests_resize_filter_pixels_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o tests/resize_filter_pixels-resize-filter-pixels.obj `if test -f 'tests/resize-filter-pixels.c'; then $(CYGPATH_W) 'tests/resize-filter-pixels.c'; else $(CYGPATH_W) '$(srcdir)/tests/resize-filter-pixels.c'; fi`
+
tests/validate-validate.o: tests/validate.c
@am__fastdepCC_TRUE@ $(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(tests_validate_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT tests/validate-validate.o -MD -MP -MF tests/$(DEPDIR)/validate-validate.Tpo -c -o tests/validate-validate.o `test -f 'tests/validate.c' || echo '$(srcdir)/'`tests/validate.c
@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) tests/$(DEPDIR)/validate-validate.Tpo tests/$(DEPDIR)/validate-validate.Po
@@ -13577,6 +13621,7 @@ distclean: distclean-am
-rm -f filters/$(DEPDIR)/MagickCore_libMagickCore_@MAGICK_MAJOR_VERSION@_@MAGICK_ABI_SUFFIX@_la-analyze.Plo
-rm -f filters/$(DEPDIR)/analyze_la-analyze.Plo
-rm -f tests/$(DEPDIR)/drawtest-drawtest.Po
+ -rm -f tests/$(DEPDIR)/resize_filter_pixels-resize-filter-pixels.Po
-rm -f tests/$(DEPDIR)/validate-validate.Po
-rm -f tests/$(DEPDIR)/wandtest-wandtest.Po
-rm -f utilities/$(DEPDIR)/magick.Po
@@ -14089,6 +14134,7 @@ maintainer-clean: maintainer-clean-am
-rm -f filters/$(DEPDIR)/MagickCore_libMagickCore_@MAGICK_MAJOR_VERSION@_@MAGICK_ABI_SUFFIX@_la-analyze.Plo
-rm -f filters/$(DEPDIR)/analyze_la-analyze.Plo
-rm -f tests/$(DEPDIR)/drawtest-drawtest.Po
+ -rm -f tests/$(DEPDIR)/resize_filter_pixels-resize-filter-pixels.Po
-rm -f tests/$(DEPDIR)/validate-validate.Po
-rm -f tests/$(DEPDIR)/wandtest-wandtest.Po
-rm -f utilities/$(DEPDIR)/magick.Po
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 42df0d7bd..2b6d8c42d 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -18,7 +18,8 @@ TESTS_CPPFLAGS = $(AM_CPPFLAGS)
TESTS_CHECK_PGRMS = \
tests/validate \
tests/drawtest \
- tests/wandtest
+ tests/wandtest \
+ tests/resize-filter-pixels
tests_validate_SOURCES = tests/validate.c tests/validate.h
tests_validate_CPPFLAGS = $(TESTS_CPPFLAGS)
@@ -35,6 +36,11 @@ tests_wandtest_CPPFLAGS = $(TESTS_CPPFLAGS)
tests_wandtest_LDFLAGS = $(LDFLAGS)
tests_wandtest_LDADD = $(MAGICKCORE_LIBS) $(MAGICKWAND_LIBS)
+tests_resize_filter_pixels_SOURCES = tests/resize-filter-pixels.c
+tests_resize_filter_pixels_CPPFLAGS = $(TESTS_CPPFLAGS)
+tests_resize_filter_pixels_LDFLAGS = $(LDFLAGS)
+tests_resize_filter_pixels_LDADD = $(MAGICKCORE_LIBS) $(MATH_LIBS)
+
TESTS_XFAIL_TESTS =
TESTS_TESTS = \
@@ -63,6 +69,7 @@ TESTS_TESTS = \
tests/validate-montage.tap \
tests/validate-stream.tap \
tests/drawtest.tap \
+ tests/resize-filter-pixels.tap \
tests/wandtest.tap
TESTS_EXTRA_DIST = \
@@ -76,7 +83,9 @@ TESTS_EXTRA_DIST = \
tests/input_gray.miff \
tests/input_truecolor.miff \
tests/sequence.miff \
+ tests/resize-filter-pixels.q16.txt \
$(TESTS_TESTS)
TESTS_CLEANFILES = \
- tests/*_out.*
+ tests/*_out.* \
+ tests/resize-filter-pixels.out
diff --git a/tests/resize-filter-pixels.c b/tests/resize-filter-pixels.c
new file mode 100644
index 000000000..e6df69e23
--- /dev/null
+++ b/tests/resize-filter-pixels.c
@@ -0,0 +1,527 @@
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% Resize Filter Pixel Tests %
+% %
+% %
+% Copyright 1999 ImageMagick Studio LLC, a non-profit organization %
+% dedicated to making software imaging solutions freely available. %
+% %
+% You may not use this file except in compliance with the License. You may %
+% obtain a copy of the License at %
+% %
+% https://imagemagick.org/license/ %
+% %
+% Unless required by applicable law or agreed to in writing, software %
+% distributed under the License is distributed on an "AS IS" BASIS, %
+% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
+% See the License for the specific language governing permissions and %
+% limitations under the License. %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+%
+%
+*/
+
+/*
+ Compare every Lanczos sample with the stored Q16 non-HDRI reference.
+
+ Each filter tap is pixel += weight * sample in double, then ClampToQuantum
+ adds one half and truncates. A compiler may contract that into a fused
+ multiply-add, as GCC and Clang do on arm64, and a fused and a separate
+ multiply plus add can fall on opposite sides of the half-quantum
+ boundary. A filtered sample may therefore differ by one quantum. A copied
+ channel is never filtered and must match exactly: the alpha of the copy
+ case, the write mask of the mask case, and the channels outside the
+ channel mask of the red-only and cyan-only cases.
+
+ tests/validate.c cannot express this contract. It round-trips image
+ formats and compares them with root-mean-square error, accepting a
+ normalized error of 0.003. At Q16 that is an RMSE of about 197 quanta,
+ so both a one-quantum boundary and a missed exact sample stay inside
+ the fuzz. The program clears MAGICK_CONFIGURE_PATH before initialization
+ so host policy and logging files cannot change the oracle. Other quantum
+ depths and HDRI builds exit 77 so the test harness can skip them.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <MagickCore/MagickCore.h>
+
+static Image *AcquireCanvas(const size_t columns,const size_t rows,
+ ExceptionInfo *exception)
+{
+ Image
+ *image;
+
+ ImageInfo
+ *image_info;
+
+ image_info=AcquireImageInfo();
+ image=AcquireImage(image_info,exception);
+ image_info=DestroyImageInfo(image_info);
+ if (image == (Image *) NULL)
+ return((Image *) NULL);
+ if (SetImageExtent(image,columns,rows,exception) == MagickFalse)
+ {
+ image=DestroyImage(image);
+ return((Image *) NULL);
+ }
+ return(image);
+}
+
+static MagickBooleanType FillPattern(Image *image,ExceptionInfo *exception)
+{
+ CacheView
+ *view;
+
+ ssize_t
+ y;
+
+ size_t
+ nch;
+
+ nch=GetPixelChannels(image);
+ view=AcquireAuthenticCacheView(image,exception);
+ for (y=0; y < (ssize_t) image->rows; y++)
+ {
+ Quantum
+ *q;
+
+ ssize_t
+ x;
+
+ q=QueueCacheViewAuthenticPixels(view,0,y,image->columns,1,exception);
+ if (q == (Quantum *) NULL)
+ {
+ view=DestroyCacheView(view);
+ return(MagickFalse);
+ }
+ for (x=0; x < (ssize_t) image->columns; x++)
+ {
+ ssize_t
+ c;
+
+ for (c=0; c < (ssize_t) nch; c++)
+ q[x*(ssize_t) nch+c]=(Quantum) ((x*1103+y*917+c*257) % 65536);
+ }
+ if (SyncCacheViewAuthenticPixels(view,exception) == MagickFalse)
+ {
+ view=DestroyCacheView(view);
+ return(MagickFalse);
+ }
+ }
+ view=DestroyCacheView(view);
+ return(MagickTrue);
+}
+
+static MagickBooleanType DumpResize(FILE *out,const char *name,Image *image,
+ const size_t columns,const size_t rows,ExceptionInfo *exception)
+{
+ CacheView
+ *view;
+
+ Image
+ *resized;
+
+ ssize_t
+ y;
+
+ size_t
+ nch;
+
+ resized=ResizeImage(image,columns,rows,LanczosFilter,exception);
+ if (resized == (Image *) NULL)
+ {
+ (void) fprintf(stderr,"resize failed: %s\n",name);
+ return(MagickFalse);
+ }
+ nch=GetPixelChannels(resized);
+ (void) fprintf(out,"CASE %s %lu %lu %lu\n",name,
+ (unsigned long) resized->columns,(unsigned long) resized->rows,
+ (unsigned long) nch);
+ view=AcquireVirtualCacheView(resized,exception);
+ for (y=0; y < (ssize_t) resized->rows; y++)
+ {
+ const Quantum
+ *p;
+
+ ssize_t
+ x;
+
+ p=GetCacheViewVirtualPixels(view,0,y,resized->columns,1,exception);
+ if (p == (const Quantum *) NULL)
+ {
+ view=DestroyCacheView(view);
+ resized=DestroyImage(resized);
+ return(MagickFalse);
+ }
+ for (x=0; x < (ssize_t) resized->columns; x++)
+ {
+ ssize_t
+ c;
+
+ for (c=0; c < (ssize_t) nch; c++)
+ {
+ if ((x != 0) || (c != 0))
+ (void) fputc(' ',out);
+ (void) fprintf(out,"%u",(unsigned int) p[x*(ssize_t) nch+c]);
+ }
+ }
+ (void) fputc('\n',out);
+ }
+ view=DestroyCacheView(view);
+ resized=DestroyImage(resized);
+ return(MagickTrue);
+}
+
+typedef struct _CopiedChannel
+{
+ const char
+ *name;
+
+ size_t
+ channel;
+} CopiedChannel;
+
+static const CopiedChannel
+ CopiedChannels[] =
+ {
+ { "rgba-copy-alpha", 3 },
+ { "rgb-write-mask", 3 },
+ { "rgb-red-only", 1 },
+ { "rgb-red-only", 2 },
+ { "cmyk-cyan-only", 1 },
+ { "cmyk-cyan-only", 2 },
+ { "cmyk-cyan-only", 3 }
+ };
+
+static int CaseTolerance(const char *name,const size_t channel)
+{
+ size_t
+ i;
+
+ for (i=0; i < (sizeof(CopiedChannels)/sizeof(*CopiedChannels)); i++)
+ if ((strcmp(name,CopiedChannels[i].name) == 0) &&
+ (channel == CopiedChannels[i].channel))
+ return(0);
+ return(1);
+}
+
+static const char *NextToken(char **cursor)
+{
+ char
+ *start;
+
+ while ((**cursor == ' ') || (**cursor == '\t') || (**cursor == '\r') ||
+ (**cursor == '\n'))
+ (*cursor)++;
+ if (**cursor == '\0')
+ return((const char *) NULL);
+ start=*cursor;
+ while ((**cursor != '\0') && (**cursor != ' ') && (**cursor != '\t') &&
+ (**cursor != '\r') && (**cursor != '\n'))
+ (*cursor)++;
+ if (**cursor != '\0')
+ {
+ **cursor='\0';
+ (*cursor)++;
+ }
+ return(start);
+}
+
+static MagickBooleanType ReadDumpLine(FILE *file,char *line,const size_t length)
+{
+ if (fgets(line,(int) length,file) == (char *) NULL)
+ return(MagickFalse);
+ if ((strchr(line,'\n') == (char *) NULL) && (feof(file) == 0))
+ {
+ (void) fprintf(stderr,"dump line exceeds %lu bytes\n",
+ (unsigned long) length);
+ return(MagickFalse);
+ }
+ return(MagickTrue);
+}
+
+static MagickBooleanType CompareDump(FILE *actual,FILE *reference,int *max_diff)
+{
+ char
+ actual_line[16384],
+ name[128],
+ reference_line[16384];
+
+ int
+ tolerance;
+
+ size_t
+ channels,
+ row,
+ sample;
+
+ *max_diff=0;
+ tolerance=0;
+ channels=0;
+ row=0;
+ sample=0;
+ name[0]='\0';
+ while (ReadDumpLine(actual,actual_line,sizeof(actual_line)) != MagickFalse)
+ {
+ char
+ *actual_cursor,
+ *reference_cursor;
+
+ if (ReadDumpLine(reference,reference_line,
+ sizeof(reference_line)) == MagickFalse)
+ {
+ (void) fprintf(stderr,"actual dump is longer than the reference\n");
+ return(MagickFalse);
+ }
+ if (strncmp(actual_line,"CASE ",5) == 0)
+ {
+ unsigned long
+ case_channels,
+ case_columns,
+ case_rows;
+
+ if (strcmp(actual_line,reference_line) != 0)
+ {
+ (void) fprintf(stderr,"case header mismatch:\n%s%s",actual_line,
+ reference_line);
+ return(MagickFalse);
+ }
+ if (sscanf(actual_line,"CASE %127s %lu %lu %lu",name,&case_columns,
+ &case_rows,&case_channels) != 4)
+ {
+ (void) fprintf(stderr,"malformed case header: %s",actual_line);
+ return(MagickFalse);
+ }
+ channels=(size_t) case_channels;
+ row=0;
+ continue;
+ }
+ actual_cursor=actual_line;
+ reference_cursor=reference_line;
+ sample=0;
+ for ( ; ; )
+ {
+ char
+ *end;
+
+ const char
+ *actual_token,
+ *reference_token;
+
+ long
+ actual_value,
+ reference_value;
+
+ int
+ difference;
+
+ size_t
+ channel,
+ column;
+
+ actual_token=NextToken(&actual_cursor);
+ reference_token=NextToken(&reference_cursor);
+ if ((actual_token == (const char *) NULL) &&
+ (reference_token == (const char *) NULL))
+ break;
+ if ((actual_token == (const char *) NULL) ||
+ (reference_token == (const char *) NULL))
+ {
+ (void) fprintf(stderr,"%s row %lu has a different sample count\n",
+ name,(unsigned long) row);
+ return(MagickFalse);
+ }
+ actual_value=strtol(actual_token,&end,10);
+ if (*end != '\0')
+ {
+ (void) fprintf(stderr,"%s row %lu has a non-numeric sample\n",name,
+ (unsigned long) row);
+ return(MagickFalse);
+ }
+ reference_value=strtol(reference_token,&end,10);
+ if (*end != '\0')
+ {
+ (void) fprintf(stderr,
+ "reference %s row %lu has a non-numeric sample\n",name,
+ (unsigned long) row);
+ return(MagickFalse);
+ }
+ column=0;
+ channel=sample;
+ if (channels != 0)
+ {
+ column=sample/channels;
+ channel=sample % channels;
+ }
+ tolerance=CaseTolerance(name,channel);
+ difference=(int) labs(actual_value-reference_value);
+ if (difference > *max_diff)
+ *max_diff=difference;
+ if (difference > tolerance)
+ {
+ (void) fprintf(stderr,"%s pixel %lu,%lu channel %lu differs by %d "
+ "(actual %ld, reference %ld, tolerance %d)\n",
+ name,(unsigned long) column,(unsigned long) row,
+ (unsigned long) channel,difference,actual_value,reference_value,
+ tolerance);
+ return(MagickFalse);
+ }
+ sample++;
+ }
+ row++;
+ }
+ if (ReadDumpLine(reference,reference_line,sizeof(reference_line)) !=
+ MagickFalse)
+ {
+ (void) fprintf(stderr,"reference dump is longer than the actual dump\n");
+ return(MagickFalse);
+ }
+ return(MagickTrue);
+}
+
+int main(int argc,char **argv)
+{
+ ExceptionInfo
+ *exception;
+
+ FILE
+ *out;
+
+ Image
+ *image,
+ *mask;
+
+ MagickBooleanType
+ status;
+
+ if ((argc != 2) && (argc != 3))
+ {
+ (void) fprintf(stderr,"usage: %s dump.txt [reference.txt]\n",argv[0]);
+ return(1);
+ }
+#if MAGICKCORE_QUANTUM_DEPTH != 16 || defined(MAGICKCORE_HDRI_SUPPORT)
+ (void) fprintf(stderr,"skip: Q16 non-HDRI build required\n");
+ return(77);
+#endif
+#if defined(_WIN32)
+ (void) _putenv("MAGICK_CONFIGURE_PATH=");
+#else
+ (void) unsetenv("MAGICK_CONFIGURE_PATH");
+#endif
+ MagickCoreGenesis(argv[0],MagickTrue);
+ (void) SetMagickResourceLimit(ThreadResource,1);
+ exception=AcquireExceptionInfo();
+ out=fopen(argv[1],"w");
+ if (out == (FILE *) NULL)
+ return(1);
+ status=MagickTrue;
+
+ image=AcquireCanvas(64,48,exception);
+ status&=FillPattern(image,exception);
+ status&=DumpResize(out,"rgb-down-64x48",image,16,12,exception);
+ image=DestroyImage(image);
+
+ image=AcquireCanvas(20,15,exception);
+ status&=FillPattern(image,exception);
+ status&=DumpResize(out,"rgb-up-20x15",image,50,38,exception);
+ /*
+ Shrink width more than height so the vertical pass sees 8 columns.
+ The horizontal pass runs first and uses the 4-row kernel.
+ */
+ status&=DumpResize(out,"rgb-remainder-20x15",image,8,4,exception);
+ image=DestroyImage(image);
+
+ image=AcquireCanvas(18,14,exception);
+ status&=SetImageAlphaChannel(image,ActivateAlphaChannel,exception);
+ status&=FillPattern(image,exception);
+ status&=DumpResize(out,"rgba-18x14",image,9,7,exception);
+ (void) SetPixelChannelTraits(image,AlphaPixelChannel,CopyPixelTrait);
+ status&=DumpResize(out,"rgba-copy-alpha",image,9,7,exception);
+ (void) SetPixelChannelTraits(image,AlphaPixelChannel,
+ (PixelTrait) (UpdatePixelTrait | BlendPixelTrait));
+ image->alpha_trait=BlendPixelTrait;
+ status&=DumpResize(out,"rgba-blend-alpha",image,9,7,exception);
+ image=DestroyImage(image);
+
+ image=AcquireCanvas(17,13,exception);
+ status&=SetImageColorspace(image,GRAYColorspace,exception);
+ status&=FillPattern(image,exception);
+ status&=DumpResize(out,"gray-17x13",image,8,6,exception);
+ image=DestroyImage(image);
+
+ /*
+ The 40x30 to 20x15 cases filter the 40 source columns vertically first:
+ two full 16-column tiles and an 8-column remainder.
+ */
+ image=AcquireCanvas(40,30,exception);
+ status&=SetImageColorspace(image,GRAYColorspace,exception);
+ status&=FillPattern(image,exception);
+ status&=DumpResize(out,"gray-40x30",image,20,15,exception);
+ image=DestroyImage(image);
+
+ image=AcquireCanvas(40,30,exception);
+ status&=FillPattern(image,exception);
+ (void) SetImageChannelMask(image,RedChannel);
+ status&=DumpResize(out,"rgb-red-only",image,20,15,exception);
+ image=DestroyImage(image);
+
+ image=AcquireCanvas(40,30,exception);
+ status&=SetImageColorspace(image,CMYKColorspace,exception);
+ status&=FillPattern(image,exception);
+ status&=DumpResize(out,"cmyk-40x30",image,20,15,exception);
+ (void) SetImageChannelMask(image,CyanChannel);
+ status&=DumpResize(out,"cmyk-cyan-only",image,20,15,exception);
+ image=DestroyImage(image);
+
+ image=AcquireCanvas(20,15,exception);
+ status&=FillPattern(image,exception);
+ mask=AcquireCanvas(20,15,exception);
+ status&=SetImageColorspace(mask,GRAYColorspace,exception);
+ status&=FillPattern(mask,exception);
+ status&=SetImageMask(image,WritePixelMask,mask,exception);
+ mask=DestroyImage(mask);
+ status&=DumpResize(out,"rgb-write-mask",image,10,8,exception);
+ image=DestroyImage(image);
+
+ (void) fclose(out);
+ if (exception->severity >= ErrorException)
+ CatchException(exception);
+ exception=DestroyExceptionInfo(exception);
+ MagickCoreTerminus();
+ if (status == MagickFalse)
+ return(1);
+ if (argc == 3)
+ {
+ FILE
+ *actual,
+ *reference;
+
+ int
+ max_diff;
+
+ actual=fopen(argv[1],"r");
+ reference=fopen(argv[2],"r");
+ if ((actual == (FILE *) NULL) || (reference == (FILE *) NULL))
+ {
+ (void) fprintf(stderr,"unable to open dump or reference\n");
+ if (actual != (FILE *) NULL)
+ (void) fclose(actual);
+ if (reference != (FILE *) NULL)
+ (void) fclose(reference);
+ return(1);
+ }
+ status=CompareDump(actual,reference,&max_diff);
+ (void) fclose(actual);
+ (void) fclose(reference);
+ (void) fprintf(stderr,"max_quantum_diff=%d\n",max_diff);
+ if (status == MagickFalse)
+ return(1);
+ }
+ return(0);
+}
diff --git a/tests/resize-filter-pixels.q16.txt b/tests/resize-filter-pixels.q16.txt
new file mode 100644
index 000000000..2d3c8231a
--- /dev/null
+++ b/tests/resize-filter-pixels.q16.txt
@@ -0,0 +1,161 @@
+CASE rgb-down-64x48 16 12 3
+3060 3317 3574 7383 7640 7897 11919 12176 12433 16280 16537 16794 20692 20949 21206 25104 25361 25618 29516 29773 30030 33928 34185 34442 38340 38597 38854 42751 43008 43265 47154 47408 47664 51667 51908 52168 54712 55092 55054 65535 65218 65535 38061 36997 34707 1144 1680 366
+6654 6911 7168 10977 11234 11491 15513 15770 16027 19874 20131 20388 24286 24543 24800 28698 28955 29212 33110 33367 33624 37522 37779 38036 41934 42191 42447 46335 46591 46849 50862 51129 51381 54131 54257 54323 62430 63113 65224 51801 50767 44039 4634 2488 1021 6091 6830 7934
+10425 10682 10939 14748 15005 15262 19284 19541 19798 23645 23902 24159 28057 28314 28571 32469 32726 32983 36881 37138 37395 41293 41550 41807 45699 45956 46211 50197 50462 50720 53735 53842 54071 60816 62060 62413 58921 55997 51482 6434 5080 5122 4609 5703 5950 11788 11892 12077
+14051 14308 14565 18374 18631 18888 22910 23167 23424 27271 27528 27785 31683 31940 32197 36095 36352 36609 40507 40764 41021 44917 45174 45427 49366 49625 49907 53267 53482 53616 59135 59441 59688 61599 60191 60280 14021 14016 9502 2890 3098 3451 11378 11548 11778 14549 14824 15082
+17719 17976 18233 22042 22299 22556 26578 26835 27092 30939 31196 31453 35351 35608 35865 39763 40020 40277 44174 44430 44687 48589 48853 49134 52864 53089 53143 56773 56928 58320 64664 65322 63881 24925 22013 15141 279 178 2325 10684 11109 11172 13921 14156 14409 18340 18599 18857
+21387 21644 21901 25710 25967 26224 30246 30503 30760 34607 34864 35121 39019 39276 39533 43430 43687 43944 47832 48096 48357 52307 52507 52644 55263 55847 56787 65535 65535 64293 32735 28916 25989 0 0 850 10176 10431 10381 13088 13320 13580 17686 17944 18201 21998 22255 22512
+25055 25312 25569 29378 29635 29892 33914 34171 34428 38275 38532 38789 42686 42943 43200 47089 47344 47598 51599 51841 52106 54709 55088 55114 65193 64633 65455 40546 39488 36549 774 1202 0 8673 8764 9620 12581 12821 12965 16805 17066 17325 21344 21601 21858 25666 25923 26180
+28723 28980 29237 33046 33303 33560 37582 37839 38096 41943 42200 42456 46344 46599 46857 50873 51139 51404 54122 54250 54342 62489 63165 64550 51424 50349 47405 3889 1617 649 6310 7152 8422 12177 12329 12390 16079 16339 16619 20477 20734 20991 25011 25268 25525 29334 29591 29848
+32391 32648 32905 36714 36971 37228 41250 41507 41764 45605 45862 46119 50103 50368 50620 53648 53748 53965 60727 61965 62580 58905 55994 53045 6541 5201 5217 4687 5791 6073 11747 11853 11988 15290 15565 15847 19788 20045 20298 24143 24400 24657 28679 28936 29193 33002 33259 33516
+36016 36273 36530 40339 40596 40853 44875 45131 45387 49262 49524 49795 53206 53411 53615 59193 59618 59736 61676 60322 60684 13983 14000 12596 2847 3065 3027 11232 11398 11676 14477 14751 15013 19006 19260 19515 23408 23665 23922 27768 28025 28282 32304 32561 32818 36627 36884 37141
+39787 40044 40301 44110 44367 44624 48647 48905 49171 52880 53120 53307 57270 57531 58166 64015 64561 64822 24514 21597 17827 347 266 1213 10722 11144 11388 13856 14091 14332 18363 18622 18880 22767 23024 23281 27179 27436 27693 31539 31796 32053 36075 36332 36589 40398 40655 40912
+43381 43638 43895 47704 47961 48218 52234 52483 52687 55785 56084 56695 64713 64839 63628 38407 30253 27915 0 0 538 10026 10413 10506 13081 13304 13552 17548 17807 18066 21949 22206 22463 26361 26618 26875 30773 31030 31287 35133 35390 35647 39669 39926 40183 43992 44249 44506
+CASE rgb-up-20x15 50 38 3
+0 35 292 45 208 465 364 566 823 871 1118 1375 1379 1651 1908 1817 2083 2340 2202 2457 2714 2659 2914 3171 3113 3370 3627 3519 3776 4033 4000 4257 4514 4406 4663 4920 4863 5120 5377 5319 5576 5833 5725 5982 6239 6206 6463 6720 6612 6869 7126 7069 7326 7583 7525 7782 8039 7931 8188 8445 8412 8669 8926 8818 9075 9332 9275 9532 9789 9731 9988 10245 10137 10394 10651 10618 10875 11132 11024 11281 11538 11481 11738 11995 11937 12194 12451 12343 12600 12857 12824 13081 13338 13230 13487 13744 13687 13944 14201 14143 14400 14657 14549 14806 15063 15030 15287 15544 15436 15693 15950 15893 16150 16407 16349 16606 16863 16755 17012 17269 17236 17493 17750 17642 17899 18156 18099 18356 18613 18555 18812 19069 18929 19186 19443 19361 19618 19875 19894 20151 20408 20446 20703 20960 20804 21061 21318 20977 21234 21491
+0 176 433 92 349 606 450 707 964 1002 1259 1516 1535 1792 2049 1967 2224 2481 2341 2598 2855 2798 3055 3312 3254 3511 3768 3660 3917 4174 4141 4398 4655 4547 4804 5061 5004 5261 5518 5460 5717 5974 5866 6123 6380 6347 6604 6861 6753 7010 7267 7210 7467 7724 7666 7923 8180 8072 8329 8586 8553 8810 9067 8959 9216 9473 9416 9673 9930 9872 10129 10386 10278 10535 10792 10759 11016 11273 11165 11422 11679 11622 11879 12136 12078 12335 12592 12484 12741 12998 12965 13222 13479 13371 13628 13885 13828 14085 14342 14284 14541 14798 14690 14947 15204 15171 15428 15685 15577 15834 16091 16034 16291 16548 16490 16747 17004 16896 17153 17410 17377 17634 17891 17783 18040 18297 18240 18497 18754 18696 18953 19210 19070 19327 19584 19502 19759 20016 20035 20292 20549 20587 20844 21101 20945 21202 21459 21118 21375 21632
+207 464 721 380 637 894 738 995 1252 1290 1547 1804 1823 2080 2337 2255 2512 2769 2629 2886 3143 3086 3343 3600 3542 3799 4056 3948 4205 4462 4429 4686 4943 4835 5092 5349 5292 5549 5806 5748 6005 6262 6154 6411 6668 6635 6892 7149 7041 7298 7555 7498 7755 8012 7954 8211 8468 8360 8617 8874 8841 9098 9355 9247 9504 9761 9704 9961 10218 10160 10417 10674 10566 10823 11080 11047 11304 11561 11453 11710 11967 11910 12167 12424 12366 12623 12880 12772 13029 13286 13253 13510 13767 13659 13916 14173 14116 14373 14630 14572 14829 15086 14978 15235 15492 15459 15716 15973 15865 16122 16379 16322 16579 16836 16778 17035 17292 17184 17441 17698 17665 17922 18179 18071 18328 18585 18528 18785 19042 18984 19241 19498 19358 19615 19872 19790 20047 20304 20323 20580 20837 20875 21132 21389 21233 21490 21747 21406 21663 21920
+657 914 1171 830 1087 1344 1188 1445 1702 1740 1997 2254 2273 2530 2787 2705 2962 3219 3079 3336 3593 3536 3793 4050 3992 4249 4506 4398 4655 4912 4879 5136 5393 5285 5542 5799 5742 5999 6256 6198 6455 6712 6604 6861 7118 7085 7342 7599 7491 7748 8005 7948 8205 8462 8404 8661 8918 8810 9067 9324 9291 9548 9805 9697 9954 10211 10154 10411 10668 10610 10867 11124 11016 11273 11530 11497 11754 12011 11903 12160 12417 12360 12617 12874 12816 13073 13330 13222 13479 13736 13703 13960 14217 14109 14366 14623 14566 14823 15080 15022 15279 15536 15428 15685 15942 15909 16166 16423 16315 16572 16829 16772 17029 17286 17228 17485 17742 17634 17891 18148 18115 18372 18629 18521 18778 19035 18978 19235 19492 19434 19691 19948 19808 20065 20322 20240 20497 20754 20773 21030 21287 21325 21582 21839 21683 21940 22197 21856 22113 22370
+1098 1355 1612 1271 1528 1785 1629 1886 2143 2181 2438 2695 2714 2971 3228 3146 3403 3660 3520 3777 4034 3977 4234 4491 4433 4690 4947 4839 5096 5353 5320 5577 5834 5726 5983 6240 6183 6440 6697 6639 6896 7153 7045 7302 7559 7526 7783 8040 7932 8189 8446 8389 8646 8903 8845 9102 9359 9251 9508 9765 9732 9989 10246 10138 10395 10652 10595 10852 11109 11051 11308 11565 11457 11714 11971 11938 12195 12452 12344 12601 12858 12801 13058 13315 13257 13514 13771 13663 13920 14177 14144 14401 14658 14550 14807 15064 15007 15264 15521 15463 15720 15977 15869 16126 16383 16350 16607 16864 16756 17013 17270 17213 17470 17727 17669 17926 18183 18075 18332 18589 18556 18813 19070 18962 19219 19476 19419 19676 19933 19875 20132 20389 20249 20506 20763 20681 20938 21195 21214 21471 21728 21766 22023 22280 22124 22381 22638 22297 22554 22811
+1457 1714 1971 1630 1887 2144 1988 2245 2502 2540 2797 3054 3073 3330 3587 3505 3762 4019 3879 4136 4393 4336 4593 4850 4792 5049 5306 5198 5455 5712 5679 5936 6193 6085 6342 6599 6542 6799 7056 6998 7255 7512 7404 7661 7918 7885 8142 8399 8291 8548 8805 8748 9005 9262 9204 9461 9718 9610 9867 10124 10091 10348 10605 10497 10754 11011 10954 11211 11468 11410 11667 11924 11816 12073 12330 12297 12554 12811 12703 12960 13217 13160 13417 13674 13616 13873 14130 14022 14279 14536 14503 14760 15017 14909 15166 15423 15366 15623 15880 15822 16079 16336 16228 16485 16742 16709 16966 17223 17115 17372 17629 17572 17829 18086 18028 18285 18542 18434 18691 18948 18915 19172 19429 19321 19578 19835 19778 20035 20292 20234 20491 20748 20608 20865 21122 21040 21297 21554 21573 21830 22087 22125 22382 22639 22483 22740 22997 22656 22913 23170
+1764 2021 2278 1937 2194 2451 2295 2552 2809 2847 3104 3361 3380 3637 3894 3812 4069 4326 4186 4443 4700 4643 4900 5157 5099 5356 5613 5505 5762 6019 5986 6243 6500 6392 6649 6906 6849 7106 7363 7305 7562 7819 7711 7968 8225 8192 8449 8706 8598 8855 9112 9055 9312 9569 9511 9768 10025 9917 10174 10431 10398 10655 10912 10804 11061 11318 11261 11518 11775 11717 11974 12231 12123 12380 12637 12604 12861 13118 13010 13267 13524 13467 13724 13981 13923 14180 14437 14329 14586 14843 14810 15067 15324 15216 15473 15730 15673 15930 16187 16129 16386 16643 16535 16792 17049 17016 17273 17530 17422 17679 17936 17879 18136 18393 18335 18592 18849 18741 18998 19255 19222 19479 19736 19628 19885 20142 20085 20342 20599 20541 20798 21055 20915 21172 21429 21347 21604 21861 21880 22137 22394 22432 22689 22946 22790 23047 23304 22963 23220 23477
+2131 2388 2645 2304 2561 2818 2662 2919 3176 3214 3471 3728 3747 4004 4261 4179 4436 4693 4553 4810 5067 5010 5267 5524 5466 5723 5980 5872 6129 6386 6353 6610 6867 6759 7016 7273 7216 7473 7730 7672 7929 8186 8078 8335 8592 8559 8816 9073 8965 9222 9479 9422 9679 9936 9878 10135 10392 10284 10541 10798 10765 11022 11279 11171 11428 11685 11628 11885 12142 12084 12341 12598 12490 12747 13004 12971 13228 13485 13377 13634 13891 13834 14091 14348 14290 14547 14804 14696 14953 15210 15177 15434 15691 15583 15840 16097 16040 16297 16554 16496 16753 17010 16902 17159 17416 17383 17640 17897 17789 18046 18303 18246 18503 18760 18702 18959 19216 19108 19365 19622 19589 19846 20103 19995 20252 20509 20452 20709 20966 20908 21165 21422 21282 21539 21796 21714 21971 22228 22247 22504 22761 22799 23056 23313 23157 23414 23671 23330 23587 23844
+2513 2770 3027 2686 2943 3200 3044 3301 3558 3596 3853 4110 4129 4386 4643 4561 4818 5075 4935 5192 5449 5392 5649 5906 5848 6105 6362 6254 6511 6768 6735 6992 7249 7141 7398 7655 7598 7855 8112 8054 8311 8568 8460 8717 8974 8941 9198 9455 9347 9604 9861 9804 10061 10318 10260 10517 10774 10666 10923 11180 11147 11404 11661 11553 11810 12067 12010 12267 12524 12466 12723 12980 12872 13129 13386 13353 13610 13867 13759 14016 14273 14216 14473 14730 14672 14929 15186 15078 15335 15592 15559 15816 16073 15965 16222 16479 16422 16679 16936 16878 17135 17392 17284 17541 17798 17765 18022 18279 18171 18428 18685 18628 18885 19142 19084 19341 19598 19490 19747 20004 19971 20228 20485 20377 20634 20891 20834 21091 21348 21290 21547 21804 21664 21921 22178 22096 22353 22610 22629 22886 23143 23181 23438 23695 23539 23796 24053 23712 23969 24226
+2841 3098 3355 3014 3271 3528 3372 3629 3886 3924 4181 4438 4457 4714 4971 4889 5146 5403 5263 5520 5777 5720 5977 6234 6176 6433 6690 6582 6839 7096 7063 7320 7577 7469 7726 7983 7926 8183 8440 8382 8639 8896 8788 9045 9302 9269 9526 9783 9675 9932 10189 10132 10389 10646 10588 10845 11102 10994 11251 11508 11475 11732 11989 11881 12138 12395 12338 12595 12852 12794 13051 13308 13200 13457 13714 13681 13938 14195 14087 14344 14601 14544 14801 15058 15000 15257 15514 15406 15663 15920 15887 16144 16401 16293 16550 16807 16750 17007 17264 17206 17463 17720 17612 17869 18126 18093 18350 18607 18499 18756 19013 18956 19213 19470 19412 19669 19926 19818 20075 20332 20299 20556 20813 20705 20962 21219 21162 21419 21676 21618 21875 22132 21992 22249 22506 22424 22681 22938 22957 23214 23471 23509 23766 24023 23867 24124 24381 24040 24297 24554
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+2823 4111 4368 4625 4989 6317 6574 6831 7251 8523 8780 9037 9435 10729 10986 11243 11641 12935 13192 13449 13847 15141 15398 15655 16053 17347 17604 17861 18259 19553 19810 20067 20465 21759 22016 22273 22671 23965 24222 24479 24877 26171 26428 26685 27083 28377 28634 28891 29289 30583 30840 31097 31495 32789 33046 33303 33701 34995 35252 35509 35907 37201 37458 37715 38113 39407 39664 39921 40296 41613 41870 42127 42558 43819 44076 44333 44724 46025 46282 46539
+4703 5945 6202 6459 6869 8151 8408 8665 9131 10357 10614 10871 11315 12563 12820 13077 13521 14769 15026 15283 15727 16975 17232 17489 17933 19181 19438 19695 20139 21387 21644 21901 22345 23593 23850 24107 24551 25799 26056 26313 26757 28005 28262 28519 28963 30211 30468 30725 31169 32417 32674 32931 33375 34623 34880 35137 35581 36829 37086 37343 37787 39035 39292 39549 39993 41241 41498 41755 42176 43447 43704 43961 44438 45653 45910 46167 46604 47859 48116 48373
+6519 7779 8036 8293 8685 9985 10242 10499 10947 12191 12448 12705 13131 14397 14654 14911 15337 16603 16860 17117 17543 18809 19066 19323 19749 21015 21272 21529 21955 23221 23478 23735 24161 25427 25684 25941 26367 27633 27890 28147 28573 29839 30096 30353 30779 32045 32302 32559 32985 34251 34508 34765 35191 36457 36714 36971 37397 38663 38920 39177 39603 40869 41126 41383 41809 43075 43332 43589 43992 45281 45538 45795 46254 47487 47744 48001 48420 49693 49950 50207
+8353 9613 9870 10127 10519 11819 12076 12333 12781 14025 14282 14539 14965 16231 16488 16745 17171 18437 18694 18951 19377 20643 20900 21157 21583 22849 23106 23363 23789 25055 25312 25569 25995 27261 27518 27775 28201 29467 29724 29981 30407 31673 31930 32187 32613 33879 34136 34393 34819 36085 36342 36599 37025 38291 38548 38805 39231 40497 40754 41011 41437 42703 42960 43217 43643 44909 45166 45423 45826 47115 47372 47629 48088 49321 49578 49835 50254 51527 51784 52041
+10187 11447 11704 11961 12353 13653 13910 14167 14615 15859 16116 16373 16799 18065 18322 18579 19005 20271 20528 20785 21211 22477 22734 22991 23417 24683 24940 25197 25623 26889 27146 27403 27829 29095 29352 29609 30035 31301 31558 31815 32241 33507 33764 34021 34447 35713 35970 36227 36653 37919 38176 38433 38859 40125 40382 40639 41065 42331 42588 42845 43271 44537 44794 45051 45477 46743 47000 47257 47660 48949 49206 49463 49922 51155 51412 51669 52088 53361 53618 53875
+12021 13281 13538 13795 14187 15487 15744 16001 16449 17693 17950 18207 18633 19899 20156 20413 20839 22105 22362 22619 23045 24311 24568 24825 25251 26517 26774 27031 27457 28723 28980 29237 29663 30929 31186 31443 31869 33135 33392 33649 34075 35341 35598 35855 36281 37547 37804 38061 38487 39753 40010 40267 40693 41959 42216 42473 42899 44165 44422 44679 45105 46371 46628 46885 47311 48577 48834 49091 49494 50783 51040 51297 51756 52989 53246 53503 53922 55195 55452 55709
+13855 15115 15372 15629 16021 17321 17578 17835 18283 19527 19784 20041 20467 21733 21990 22247 22673 23939 24196 24453 24879 26145 26402 26659 27085 28351 28608 28865 29291 30557 30814 31071 31497 32763 33020 33277 33703 34969 35226 35483 35909 37175 37432 37689 38115 39381 39638 39895 40321 41587 41844 42101 42527 43793 44050 44307 44733 45999 46256 46513 46939 48205 48462 48719 49145 50411 50668 50925 51328 52617 52874 53131 53590 54823 55080 55337 55756 57029 57286 57543
+15689 16949 17206 17463 17855 19155 19412 19669 20117 21361 21618 21875 22301 23567 23824 24081 24507 25773 26030 26287 26713 27979 28236 28493 28919 30185 30442 30699 31125 32391 32648 32905 33331 34597 34854 35111 35537 36803 37060 37317 37743 39009 39266 39523 39949 41215 41472 41729 42155 43421 43678 43935 44361 45627 45884 46141 46567 47833 48090 48347 48773 50039 50296 50553 50979 52245 52502 52759 53162 54451 54708 54965 55424 56657 56914 57171 57590 58863 59120 59377
+17523 18783 19040 19297 19689 20989 21246 21503 21951 23195 23452 23709 24135 25401 25658 25915 26341 27607 27864 28121 28547 29813 30070 30327 30753 32019 32276 32533 32959 34225 34482 34739 35165 36431 36688 36945 37371 38637 38894 39151 39577 40843 41100 41357 41783 43049 43306 43563 43989 45255 45512 45769 46195 47461 47718 47975 48401 49667 49924 50181 50607 51873 52130 52387 52813 54079 54336 54593 54996 56285 56542 56799 57258 58491 58748 59005 59424 60697 60954 61211
+19357 20617 20874 21131 21523 22823 23080 23337 23785 25029 25286 25543 25969 27235 27492 27749 28175 29441 29698 29955 30381 31647 31904 32161 32587 33853 34110 34367 34793 36059 36316 36573 36999 38265 38522 38779 39205 40471 40728 40985 41411 42677 42934 43191 43617 44883 45140 45397 45823 47089 47346 47603 48029 49295 49552 49809 50235 51501 51758 52015 52441 53707 53964 54221 54646 55913 56170 56427 56820 58119 58376 58633 59140 60325 60582 60839 60564 62531 62788 63045
+21191 22451 22708 22965 23357 24657 24914 25171 25619 26863 27120 27377 27803 29069 29326 29583 30009 31275 31532 31789 32215 33481 33738 33995 34421 35687 35944 36201 36627 37893 38150 38407 38833 40099 40356 40613 41039 42305 42562 42819 43245 44511 44768 45025 45451 46717 46974 47231 47657 48923 49180 49437 49863 51129 51386 51643 52069 53335 53592 53849 54275 55541 55798 56055 56466 57747 58004 58261 58741 59953 60210 60467 60395 62159 62416 62673 64276 64365 64622 64879
+23006 24285 24542 24799 25172 26491 26748 27005 27434 28697 28954 29211 29618 30903 31160 31417 31824 33109 33366 33623 34030 35315 35572 35829 36236 37521 37778 38035 38442 39727 39984 40241 40648 41933 42190 42447 42854 44139 44396 44653 45060 46345 46602 46859 47266 48551 48808 49065 49472 50757 51014 51271 51678 52963 53220 53477 53884 55169 55426 55683 56086 57375 57632 57889 58351 59581 59838 60095 59811 61787 62044 62301 65011 63993 64250 64507 48355 663 920 1177
+24886 26119 26376 26633 27052 28325 28582 28839 29314 30531 30788 31045 31498 32737 32994 33251 33704 34943 35200 35457 35910 37149 37406 37663 38116 39355 39612 39869 40322 41561 41818 42075 42528 43767 44024 44281 44734 45973 46230 46487 46940 48179 48436 48693 49146 50385 50642 50899 51352 52591 52848 53105 53558 54797 55054 55311 55764 57003 57260 57517 57975 59209 59466 59723 59395 61415 61672 61929 65535 63621 63878 64135 46792 291 548 805 875 2497 2754 3011
+26687 27953 28210 28467 28853 30159 30416 30673 31115 32365 32622 32879 33299 34571 34828 35085 35505 36777 37034 37291 37711 38983 39240 39497 39917 41189 41446 41703 42123 43395 43652 43909 44329 45601 45858 46115 46535 47807 48064 48321 48741 50013 50270 50527 50947 52219 52476 52733 53153 54425 54682 54939 55359 56631 56888 57145 57565 58837 59094 59351 59656 61043 61300 61557 61774 63249 63506 63763 65535 65455 176 433 18727 2125 2382 2639 0 4331 4588 4845
+CASE rgb-write-mask 10 8 4
+2020 2277 2534 2020 4226 4483 4740 4226 6432 6689 6946 6432 8638 8895 9152 8638 10844 11101 11358 10844 13050 13307 13564 13050 15256 15513 15770 15256 17462 17719 17976 17462 19668 19925 20182 19668 21874 22131 22388 21874
+3854 4111 4368 3854 6060 6317 6574 6060 8266 8523 8780 8266 10472 10729 10986 10472 12678 12935 13192 12678 14884 15141 15398 14884 17090 17347 17604 17090 19296 19553 19810 19296 21502 21759 22016 21502 23708 23965 24222 23708
+5688 5945 6202 5688 7894 8151 8408 7894 10100 10357 10614 10100 12306 12563 12820 12306 14512 14769 15026 14512 16718 16975 17232 16718 18924 19181 19438 18924 21130 21387 21644 21130 23336 23593 23850 23336 25542 25799 26056 25542
+7522 7779 8036 7522 9728 9985 10242 9728 11934 12191 12448 11934 14140 14397 14654 14140 16346 16603 16860 16346 18552 18809 19066 18552 20758 21015 21272 20758 22964 23221 23478 22964 25170 25427 25684 25170 27376 27633 27890 27376
+8439 8696 8953 8439 10645 10902 11159 10645 12851 13108 13365 12851 15057 15314 15571 15057 17263 17520 17777 17263 19469 19726 19983 19469 21675 21932 22189 21675 23881 24138 24395 23881 26087 26344 26601 26087 28293 28550 28807 28293
+10273 10530 10787 10273 12479 12736 12993 12479 14685 14942 15199 14685 16891 17148 17405 16891 19097 19354 19611 19097 21303 21560 21817 21303 23509 23766 24023 23509 25715 25972 26229 25715 27921 28178 28435 27921 30127 30384 30641 30127
+12107 12364 12621 12107 14313 14570 14827 14313 16519 16776 17033 16519 18725 18982 19239 18725 20931 21188 21445 20931 23137 23394 23651 23137 25343 25600 25857 25343 27549 27806 28063 27549 29755 30012 30269 29755 31961 32218 32475 31961
+13941 14198 14455 13941 16147 16404 16661 16147 18353 18610 18867 18353 20559 20816 21073 20559 22765 23022 23279 22765 24971 25228 25485 24971 27177 27434 27691 27177 29383 29640 29897 29383 31589 31846 32103 31589 33045 33302 33559 33795
diff --git a/tests/resize-filter-pixels.tap b/tests/resize-filter-pixels.tap
new file mode 100755
index 000000000..73796c095
--- /dev/null
+++ b/tests/resize-filter-pixels.tap
@@ -0,0 +1,38 @@
+#!/bin/sh
+#
+# Copyright 1999 ImageMagick Studio LLC, a non-profit organization
+# dedicated to making software imaging solutions freely available.
+#
+# You may not use this file except in compliance with the License. You may
+# obtain a copy of the License at
+#
+# https://imagemagick.org/license/
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+. ./common.shi
+. ${srcdir}/tests/common.shi
+
+actual=resize-filter-pixels.out
+reference="${SRCDIR}/resize-filter-pixels.q16.txt"
+rm -f "${actual}"
+
+./resize-filter-pixels "${actual}" "${reference}"
+status=$?
+if [ "${status}" -eq 77 ]; then
+ echo "1..0 # SKIP Q16 non-HDRI build required"
+ exit 0
+fi
+
+echo "1..1"
+if [ "${status}" -eq 0 ]; then
+ echo "ok"
+else
+ echo "not ok"
+ echo "# resize filter pixels differ from the Q16 reference"
+fi
+: