Update four in the Graph Type Rendering Saga. Here just a quick update on fixing serif font glyphs like g and æ and inner shape or holes within OutlineShape in general. Continue reading “Graph Type Rendering Update 4”
Tag: Java
Graph Type Rendering Update 3
Just another little update, the 3rd, see first update and the second one for progress.
Basically one bug within the TypecastRenderer has been fixed, transforming the Glyph into our OutlineShape. Furthermore it may produce Java code to be pasted in a test class to test remaining issues. Continue reading “Graph Type Rendering Update 3”
Graph Type Rendering Update 1
After releasing JogAmp 2.4.0 (see feature/buglist), it was time to tackle an outstanding issue once again: Type Rendering. Motivation was born again by finding the most interesting feature to use Java with JOGL on Desktop, Mobile and Embedded Devices. At least for my taste, I identified this to be Graph UI, an immersive UI within the 3D scene including text and UI objects and user interaction. Continue reading “Graph Type Rendering Update 1”
Some late C++/Java Project Experience
Lately we started to discuss JogAmp‘s Project Management a little bit and touched things like efficient Java JNI binding to native foreign functions.
Allow me to elaborate on this issue a little bit (forum copy), perhaps even go this far to debate down on the metal C++ vs virtual Java performance.
Keep in mind, I am an old dog and always focus on performance and such thing even on the Java side 😉 Continue reading “Some late C++/Java Project Experience”
Direct-BT C++ Implementation Details (Part 1)
This is the first article covering Direct-BT‘s implementation details including jaulib.
See Direct-BT, Bluetooth Server and Client Programming in C++ and Java (Part 1) for a little introduction to Direct-BT.
Standard and Proprietary Communication Channels
As described, we were required to utilize the host Bluetooth implementation in the GNU/Linux kernel, i.e. BlueZ/Kernel directly without D-Bus to achieve best performance and access the native HCI, L2CAP/GATT and SMP communication channels directly. Continue reading “Direct-BT C++ Implementation Details (Part 1)”
Direct-BT, Bluetooth Server and Client Programming in C++ and Java (Part 1)
This is the first article covering Direct-BT using version 2.7.1 and may give you a little introduction into this project.
See Direct-BT C++ Implementation Details (Part 1) for some insight view.
Overview
Direct-BT provides direct Bluetooth LE and BREDR programming, offering robust high-performance support for embedded & desktop with zero overhead via C++ and Java.
It supports a fully event driven workflow from adapter management, device discovery to GATT programming, using its platform agnostic HCI, L2CAP, SMP and GATT protocol implementation.
Multiple Bluetooth adapter are handled, as well as multiple concurrent connections per adapter.
Peripheral server device programming is supported as well as the central client, which is also used for Java and C++ self unit testing across two or more Bluetooth adapter. Continue reading “Direct-BT, Bluetooth Server and Client Programming in C++ and Java (Part 1)”
What is Direct-BT? Where is JogAmp 2.4.0?
What is Direct-BT?
I happily joined Xerxes’s call to enhance the
Bluetooth experience on embedded GNU/Linux for Zafena.
This ended up in a new Bluetooth LE (almost done) and BREDR (in progress)
C++-11 implementation named Direct-BT.
It exposes a modern Java binding to the refactored original TinyB. Continue reading “What is Direct-BT? Where is JogAmp 2.4.0?”
Resurrecting a dying Species? Bring back Java™ to the Browser?
While I was doing the admin work for the next JogAmp release 2.4.0 I added some old video teaser supporting the point of enabling high performance hardware accelerated features to anything Java™’ish for any platforms.
It rang some belts that all these demos were easily and interactive launched used Applets within the browser.
Sadly today, browser don’t support such plugin’s anymore, which enabled simplified launching of Java™ Applet’s and its seamless integration into the web page.
I well remember the debates back then, about bloated browsers and security issues. But what do we have today? Bigger (or bloated) browsers containing the VM implementation itself, only that this time it is not Java™ but a JavaScript VM. Not a big qualitative change, but a restriction to choice, IMHO. This move only disabled third parties enabling their content via the browser interface. Almost sounds like the old Microsoft and Firefox browser wars, only that this time all browser vendor are aligned and believe to be the good guys now 😉
Most notable for me is that the security issues has not changed here at all. Continue reading “Resurrecting a dying Species? Bring back Java™ to the Browser?”
JogAmp 2.4.0 Release Feature Freeze & Complete
Note that all branches have been merged back into master.
General 2.4.0 Release Details
See wiki entry.
New Features of 2.4.0 Release Details
See wiki entry. Continue reading “JogAmp 2.4.0 Release Feature Freeze & Complete”
Cross Compilation to Arm64 for OpenJDK, JogAmp on GNU/Linux, iOS, ..
Finally pushed our crosstool-ng-projects configuration to our SCM repositories and published the latest signed & hashed binaries here.
Changes to the last April toolchain builds are multiple:
- Updating crosstool-ng to latest release 1.24.0
- Aligning configuration with Debian 10 (Buster):
- glibc 2.28
- binutils 2.31.1
- gcc 8.3.0 (unchanged)
- Using 4-tuple symbolic links to 3-tuple, dropping vendor. This allows drop-in usage for OpenJDK cross-compilation via –with-toolchain-path=/usr/local/x-tools/aarch64-unknown-linux-gnu/bin
Continue reading “Cross Compilation to Arm64 for OpenJDK, JogAmp on GNU/Linux, iOS, ..”