Time for action – compiling and embedding libpng module

Let's load an OpenGL texture from a PNG file in DroidBlaster.

1. Go to the website http://www.libpng.org/pub/png/libpng.html and download the libpng source package (which is Version 1.6.10 in this book).

   Note

   The original libpng 1.6.10 archive is provided with this book in the Libraries/libpng folder.

   Create a folder named libpng inside $ANDROID_NDK/sources/. Move all files from the libpng package into this.

   Copy the file libpng/scripts/pnglibconf.h.prebuilt into the root folder libpng with other source files. Rename it as pnglibconf.h.

   Note

   The folder $ANDROID_NDK/sources is a special folder considered as a module folder by default. It contains reusable libraries. See Chapter 9, Porting Existing Libraries to Android, for more information.

2. Write the $ANDROID_NDK/sources/libpng/Android.mk file with the content given in the following code:

   LOCAL_PATH:= $(call my-dir)
   
   include $(CLEAR_VARS)
   
   LS_C=$(subst $(1)/,,$(wildcard $(1)/*.c))
   
   LOCAL_MODULE...