fix(png): increase allowed width/height limit

jessey-git · jessey-git · commit 7c5d9228dc01 · 2025-03-07T20:35:48.000-08:00
diff --git a/src/png.imageio/pnginput.cpp b/src/png.imageio/pnginput.cpp
@@ -165,7 +165,7 @@ PNGInput::open(const std::string& name, ImageSpec& newspec)
                                  m_interlace_type, m_bg, m_spec,
                                  m_keep_unassociated_alpha);
     if (!ok || m_err
-        || !check_open(m_spec, { 0, 1 << 16, 0, 1 << 16, 0, 1, 0, 4 })) {
+        || !check_open(m_spec, { 0, 1 << 20, 0, 1 << 20, 0, 1, 0, 4 })) {
         close();
         return false;
     }
diff --git a/src/png.imageio/pngoutput.cpp b/src/png.imageio/pngoutput.cpp
@@ -135,7 +135,7 @@ bool
 PNGOutput::open(const std::string& name, const ImageSpec& userspec,
                 OpenMode mode)
 {
-    if (!check_open(mode, userspec, { 0, 65535, 0, 65535, 0, 1, 0, 256 }))
+    if (!check_open(mode, userspec, { 0, 1 << 20, 0, 1 << 20, 0, 1, 0, 4 }))
         return false;
 
     // If not uint8 or uint16, default to uint8

Original file line number	Diff line number	Diff line change
`@@ -165,7 +165,7 @@ PNGInput::open(const std::string& name, ImageSpec& newspec)`
`165`	`165`	`m_interlace_type, m_bg, m_spec,`
`166`	`166`	`m_keep_unassociated_alpha);`
`167`	`167`	`if (!ok \|\| m_err`
`168`		`- \|\| !check_open(m_spec, { 0, 1 << 16, 0, 1 << 16, 0, 1, 0, 4 })) {`
	`168`	`+ \|\| !check_open(m_spec, { 0, 1 << 20, 0, 1 << 20, 0, 1, 0, 4 })) {`
`169`	`169`	`close();`
`170`	`170`	`return false;`
`171`	`171`	`}`
Original file line number	Diff line number	Diff line change
`@@ -135,7 +135,7 @@ bool`
`135`	`135`	`PNGOutput::open(const std::string& name, const ImageSpec& userspec,`
`136`	`136`	`OpenMode mode)`
`137`	`137`	`{`
`138`		`- if (!check_open(mode, userspec, { 0, 65535, 0, 65535, 0, 1, 0, 256 }))`
	`138`	`+ if (!check_open(mode, userspec, { 0, 1 << 20, 0, 1 << 20, 0, 1, 0, 4 }))`
`139`	`139`	`return false;`
`140`	`140`
`141`	`141`	`// If not uint8 or uint16, default to uint8`