Category: programming
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A word on multithreading
A lot of people have asked why nds4droid only takes 50% of their CPU on quad core devices. The reason is generally straightforward: nds4droid has two main threads, one that does the actual emulation and one that does all drawing/compositing/input processing. The actual “main” emulation thread is bottleneck and why the emulator can be slow; […]
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snes4nacl — SNES emulation in the browser
I was at Google I/O in San Francisco last week and went to a great talk about Google Native Client, which is a new technology that allows direct execution of x86 code in the browser via some clever sandboxing. While in the talk about Gaming in the Cloud I got the idea of porting a SNES […]
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An introduction to native backed objects with the Android NDK
As many Android developers know the Android NDK is used to cross-compile native (C/C++) code to run in Android programs. Unfortunately, because it uses JNI we’re limited to a C-style call interface. Tools like SWIG can be used to automatically generate wrappers for existing code including C++ classes. In this post I’ll provide an introduction […]
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Over-aggressive GCC optimization can cause SIGBUS crash when using memcpy with the Android NDK
At work we’ve been developing new Android hardware, and as such I’ve been porting a lot of our existing C/C++ code to Android using the NDK, a collection of GNU build tools (gcc, objcopy, etc.) and associated scripts to aid the development of native C/C++ code on Android. One of our projects is nearly 1000 source […]
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Progressive drawing of simple SVGs on the HTML5 Canvas element
The HTML5 (is there supposed to be a space? I’m not sure) Canvas element is pretty cool! A recent school project involved visualizing some different data sets from factual.com in an “interesting” manner. Most of what we did just a standard Google Maps API mash-up but I decided to spruce it up a bit with an […]