feat: Added check_open for PNG, JPEG, and EXR readers

Signed-off-by: Dharshan Vishwanatha <dharshanv1999@gmail.com>

Author: DharshanV

src/jpeg.imageio/jpeginput.cpp

@@ -253,6 +253,9 @@ JpgInput::open(const std::string& name, ImageSpec& newspec)
     m_spec = ImageSpec(m_cinfo.output_width, m_cinfo.output_height, nchannels,
                        TypeDesc::UINT8);
 
+    if (!check_open(m_spec, { 0, 1 << 16, 0, 1 << 16, 0, 1, 0, 3 }))
+        return false;
+
     // Assume JPEG is in sRGB unless the Exif or XMP tags say otherwise.
     m_spec.attribute("oiio:ColorSpace", "sRGB");
 

src/openexr.imageio/exrinput.cpp

@@ -1024,6 +1024,9 @@ OpenEXRInput::seek_subimage(int subimage, int miplevel)
     m_miplevel = miplevel;
     m_spec     = part.spec;
 
+    if (!check_open(m_spec, { 0, 1 << 30, 0, 1 << 30, 0, 1 << 16, 0, 1 << 16 }))
+        return false;
+
     if (miplevel == 0 && part.levelmode == Imf::ONE_LEVEL) {
         return true;
     }

src/png.imageio/pnginput.cpp

@@ -162,7 +162,8 @@ PNGInput::open(const std::string& name, ImageSpec& newspec)
     bool ok = PNG_pvt::read_info(m_png, m_info, m_bit_depth, m_color_type,
                                  m_interlace_type, m_bg, m_spec,
                                  m_keep_unassociated_alpha);
-    if (!ok || m_err) {
+    if (!ok || m_err
+        || check_open(m_spec, { 0, 1 << 30, 0, 1 << 30, 0, 1, 0, 4 })) {
         close();
         return false;
     }