I’m working on a cross platform library for iOS and Android devices. The header files for OpenGL ES are in different folders for these platforms (see end of post), so I need to #include them differently per platform. Took me a while to find the proper one to #define for the iOS platform, so here it is:
#ifdef __APPLE__ #include "TargetConditionals.h" #endif #if (defined(TARGET_OS_IPHONE) || defined(TARGET_IPHONE_SIMULATOR)) #define PLATFORM_IOS #elif (defined(ANDROID)) #define PLATFORM_ANDROID #endif
TargetConditionals.h is where the Target_OS_IPHONE and TARGET_IPHONE_SIMULATOR are defined, and it is only available on a Mac, hence it is wrapped in __APPLE__. The second part, PLATFORM_IOS is the preprocessor macro I’ll use throughout my code.
The #elif clause takes care of Android platform.
The OpenGL ES headers are located here:
- iOS
- #include <OpenGLES/ES1/gl.h>
- #include <OpenGLES/ES1/glext.h>
- (Swap ES1 for ES2 if you’re using that)
- Android
- #include <GLES/gl.h>
- #include <GLES/glext.h>
- #include <GLES/glplatform.h>
- #include <GLES2/gl2.h>
- #include <GLES2/gl2ext.h>
- #include <GLES2/gl2ext.h>