summary refs log tree commit diff
diff options
context:
space:
mode:
authorJune McEnroe <june@causal.agency>2018-02-14 17:03:27 -0500
committerJune McEnroe <june@causal.agency>2018-02-14 17:03:27 -0500
commit442d034243dc1a8579f163de0e9823af4f7f5fc3 (patch)
treeb43482543e89c3f5f2d6a9f53ed3f4f117af07fe
parentWrite newlines between watch iterations (diff)
downloadsrc-442d034243dc1a8579f163de0e9823af4f7f5fc3.tar.gz
src-442d034243dc1a8579f163de0e9823af4f7f5fc3.zip
Write at least 1 for each component of sBIT in gfxx
PNG requires each to be 0 < x <= depth. ImageMagick actually checks.
Diffstat (limited to '')
-rw-r--r--bin/gfxx.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/bin/gfxx.c b/bin/gfxx.c
index 6ccb17cb..5f05650c 100644
--- a/bin/gfxx.c
+++ b/bin/gfxx.c
@@ -28,9 +28,11 @@
 #include <unistd.h>
 #include <zlib.h>
 
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#define MASK(b) ((1 << (b)) - 1)
+
 #define RGB(r, g, b) ((uint32_t)(r) << 16 | (uint32_t)(g) << 8 | (uint32_t)(b))
 #define GRAY(n) RGB(n, n, n)
-#define MASK(b) ((1 << (b)) - 1)
 
 static enum {
     COLOR_INDEXED,
@@ -351,7 +353,8 @@ static void pngDump(uint32_t *src, size_t srcWidth, size_t srcHeight) {
         pngWrite(options, strlen(options));
     }
     PNG_CHUNK("sBIT", 3) {
-        pngWrite(&bits[R], 3);
+        uint8_t sbit[3] = { MAX(bits[R], 1), MAX(bits[G], 1), MAX(bits[B], 1) };
+        pngWrite(sbit, sizeof(sbit));
     }
     PNG_CHUNK("IDAT", dataSize) {
         pngWrite(data, dataSize);
eee9bd725d453b&follow=1'>Import LibreSSL 3.4.1June McEnroe 2021-09-17Import LibreSSL 3.4.0June McEnroe 2021-08-24Import LibreSSL 3.3.4June McEnroe 2021-05-25Bump version to 3.3.3p1 3.3.3p1June McEnroe 2021-05-25build: Add scripts to EXTRA_DISTJune McEnroe 2021-05-25import: Add missing scripts/wrap-compiler-for-flag-checkJune McEnroe 2021-05-08Import LibreSSL 3.3.3June McEnroe 2021-04-18build: Remove added x509_verify.3 links 3.3.2June McEnroe 2021-04-18tls: Use EC_KEY_set_ex_dataJune McEnroe 2021-04-18Import LibreSSL 3.3.2June McEnroe 2021-03-05Bump version to 3.3.1p1 3.3.1p1June McEnroe 2021-03-05build: Add OpenSSL includes to libcompatJune McEnroe Some compat sources (getentropy_linux.c for example) require OpenSSL. Reported by Robert Scheck. 2020-12-15Import LibreSSL 3.3.1June McEnroe 2020-11-24Import LibreSSL 3.3.0June McEnroe 2020-10-22Import LibreSSL 3.2.2June McEnroe 2020-09-29Import LibreSSL 3.2.1June McEnroe 2020-09-29import: Add m4/ax_add_fortify_source.m4June McEnroe 2020-08-05build: Add README.7 to EXTRA_DIST 3.2.0June McEnroe 2020-08-03doc: Indicate that only OpenSSL 1.1.1b and newer workJune McEnroe