EGLTRUE

EGLTRUE is a nonstandard macro that may appear in some codebases that interface with the EGL API. It is not part of the official Khronos EGL specification, and its meaning is not defined by EGL itself. In standard EGL, boolean values are represented by the EGLBoolean type and the macros EGL_TRUE and EGL_FALSE, typically defined as 1 and 0.

The presence of EGLTRUE usually stems from project-specific conventions. Some codebases define EGLTRUE as 1, while others define it as an alias to EGL_TRUE, for example by writing a local definition such as #define EGLTRUE EGL_TRUE. The goal is to improve readability or to maintain compatibility with older code that used a different naming convention.

Portability and compatibility considerations are important with EGLTRUE. Since it is not guaranteed to be defined by the EGL headers, code that uses EGLTRUE may fail to compile on platforms or toolchains that do not provide the local definition. To maximize portability, developers are generally advised to rely on the official EGL_TRUE macro and the EGLBoolean type rather than introducing nonstandard aliases.

In practice, if EGLTRUE is encountered, it is prudent to locate its definition in the codebase and ensure it aligns with EGL_TRUE to avoid inconsistencies. Otherwise, replacing EGLTRUE with EGL_TRUE can help maintain compatibility with the EGL specification and with other libraries that interact with EGL.

See also: EGL, EGL_TRUE, EGL_FALSE, EGLBoolean.