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pnginfo: extract eXIf chunk data

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This commit is contained in:
Přemysl Eric Janouch 2021-12-10 16:48:23 +01:00
parent 16c6766e79
commit fa15707d9b
Signed by: p
GPG Key ID: A0420B94F92B9493
4 changed files with 1277 additions and 1247 deletions
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3
tools/Makefile
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@ -1,13 +1,14 @@
SHELL = /bin/sh
# libjq 1.6 lacks a pkg-config file, and there is no release in sight.
CFLAGS = -g -O2 -Wall -Wextra `pkg-config --cflags $(deps)`
# libjq 1.6 is required.
CFLAGS = -g -O2 -Wall -Wextra `pkg-config --cflags $(deps)`
LDLIBS = -ljq `pkg-config --libs $(deps)`
deps = libpng
targets = pnginfo jpeginfo
all: $(targets)
$(targets): info.h
clean:
rm -f $(targets)

1265
tools/info.h Normal file
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File diff suppressed because it is too large Load Diff

1246
tools/jpeginfo.c
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File diff suppressed because it is too large Load Diff

10
tools/pnginfo.c
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@ -15,6 +15,8 @@
// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
#include "info.h"
#include <png.h>
#include <jv.h>
@ -143,12 +145,16 @@ extract_chunks(png_structp pngp, png_infop infop)
if (png_get_iCCP(pngp, infop, &name, NULL, &profile, &profile_len))
o = jv_object_set(o, jv_string("ICC"), jv_string(name));
// https://ftp-osl.osuosl.org/pub/libpng/documents/pngext-1.5.0.html#C.eXIf
jv set = jv_object();
png_unknown_chunkp unknowns = NULL;
int unknowns_len = png_get_unknown_chunks(pngp, infop, &unknowns);
for (int i = 0; i < unknowns_len; i++)
for (int i = 0; i < unknowns_len; i++) {
set = jv_object_set(set,
jv_string((const char *) unknowns[i].name), jv_true());
if (!strcmp((const char *) unknowns[i].name, "eXIf"))
o = parse_exif(o, unknowns[i].data, unknowns[i].size);
}
jv a = jv_array();
jv_object_keys_foreach(set, key)
@ -227,7 +233,7 @@ error_png:
fclose(fp);
error:
if (err) {
o = jv_object_set(o, jv_string("error"), jv_string(err));
o = add_error(o, err);
free(err);
}
return o;