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Android NDK Beginner`s Guide - Second Edition
book

Android NDK Beginner`s Guide - Second Edition

by Sylvain Ratabouil
April 2015
Beginner to intermediate content levelBeginner to intermediate
494 pages
10h 26m
English
Packt Publishing
Content preview from Android NDK Beginner`s Guide - Second Edition

Time for action – loading a PNG image

Now that libpng is compiled, let's read a real PNG file with it:

  1. Edit jni/GraphicsManager.hpp and include the Resource header file.

    Create a new structure named TextureProperties containing:

    • A resource representing the texture asset
    • An OpenGL texture identifier (which is a kind of handle)
    • A width and a height
      ...
      #include "Resource.hpp"
      #include "Types.hpp"
      ...
      
      struct TextureProperties {
          Resource* textureResource;
          GLuint texture;
          int32_t width;
          int32_t height;
      };
      ...
  2. Append a method loadTexture() to the GraphicsManager to read a PNG and load it into an OpenGL texture.

    Textures are saved in an mTextures array to cache and finalize them.

    ... class GraphicsManager { public: ... status start(); void stop(); status update(); ...
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Publisher Resources

ISBN: 9781783989645Supplemental Content