与PC相比，为什么Android上显示的纹理更大且更完整？

My aim is to write a game in C++ for Linux, Windows and Android. I use SDL and am able to draw basic geometric shapes using OpenGL ES 2.0 and shaders. But when I try to apply textures to these shapes I recognize, that they appear larger and incomplete on Android. On PC it works fine. My code does not has to be changed to compile for Android. I use Ubuntu 14.10 and test it on it as well as on my Nexus 5 with Android 5.0.1.My aim is to write a game in C++ for Linux, Win