FindPNG¶

Finds libpng, the official reference library for the PNG image format:

find_package(PNG [<version>] [...])

Note

The PNG library depends on the ZLib compression library, which must be found for this module to succeed.

Imported Targets¶

This module provides the following Imported Targets:

PNG::PNG: Added in version 3.5.

Target encapsulating the libpng library usage requirements, available if libpng is found.

This module defines the following variables:

PNG_FOUND: Boolean indicating whether the (requested version of) PNG library was found.
PNG_VERSION: Added in version 4.2.

The version of the PNG library found.
PNG_INCLUDE_DIRS: Directory containing the PNG headers (e.g., png.h).
PNG_LIBRARIES: PNG libraries required for linking.
PNG_DEFINITIONS: Compile definitions for using PNG, if any. They can be added with target_compile_definitions() command when not using the PNG::PNG imported target.

The following variables may also be set for backward compatibility:

PNG_LIBRARY: Deprecated since version 3.0: Use the PNG::PNG imported target.

Path to the PNG library.
PNG_INCLUDE_DIR: Deprecated since version 3.0: Use the PNG::PNG imported target.

Directory containing the PNG headers (same as PNG_INCLUDE_DIRS).
PNG_VERSION_STRING: Deprecated since version 4.2: Superseded by the PNG_VERSION.

The version of the PNG library found.

Finding PNG library and using it in a project:

find_package(PNG)
target_link_libraries(project_target PRIVATE PNG::PNG)