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by HeadCase
Tue Jul 30, 2019 8:16 am
Forum: Graphics programming
Topic: New Chromium video bug introduced with rpi-update
Replies: 1
Views: 1188

New Chromium video bug introduced with rpi-update

Last week there was an rpi-update which introduced a bug in chromium video playback. I have 2 Pi 4 systems setup (one at work and one at home). I did the rpi-update on both systems, and one stopped playing youtubes in chromium and the other one didn't. I reverted to the previous rpi-update and the p...
by HeadCase
Fri Jul 12, 2019 9:33 am
Forum: General discussion
Topic: PI4B and Raspbian challenge - Use as main computer a fortnight.
Replies: 36
Views: 2363

Re: PI4B and Raspbian challenge - Use as main computer a fortnight.

Altium? Not a chance of that running. Currently looking at other PCB design software. I can recommend Kicad. It is in Add/remove Software, so easy to install. Kicad 5 uses accelerated graphics by default, so zooming is very fast. Even the push-and-shove router works on Pi4. Reliably produces gerber...
by HeadCase
Mon Jul 08, 2019 9:13 am
Forum: Graphics programming
Topic: Matching versions in OpenGL, GLES and GLSL
Replies: 2
Views: 1179

Matching versions in OpenGL, GLES and GLSL

Yesterday I compiled the latest version of https://www.raylib.com to test on RPi 4. Raylib is an easy to use graphics library that lets you do basic 2d/3d apps with minimal pain. It comes with a large set of tutorial examples that highlight the various features. Most of the examples run without prob...
by HeadCase
Mon Jul 08, 2019 4:14 am
Forum: Graphics programming
Topic: Possible memory leak in Anholt driver
Replies: 8
Views: 1187

Re: Possible memory leak in Anholt driver

Colossal amount of work went in to the new V3D driver prior the Pi4 release! After doing raspi-update and getting chromium accelerated, there really is no great difference between a Pi 4 and an x86 linux machine. It is all working very nicely. I wonder how many people really appreciate what a big d...
by HeadCase
Fri Jul 05, 2019 1:14 am
Forum: Graphics programming
Topic: Possible memory leak in Anholt driver
Replies: 8
Views: 1187

Re: Possible memory leak in Anholt driver

I have tested this code on a Pi4 4G and can confirm that this problem is fixed. Love2D 11.1 installs from the standard software app and works just like a x86 linux machine.
by HeadCase
Thu Jul 04, 2019 1:15 am
Forum: OpenGLES
Topic: Does the Raspberry Pi 4 (4 GB) support OpenGL 3.3?
Replies: 9
Views: 4048

Re: Does the Raspberry Pi 4 (4 GB) support OpenGL 3.3?

glxinfo says opengl version is 3.1 I just checked on Pi4 with glxinfo - the current supported level of opengl is 2.1 There seems to be some software out there that has deprecated openGL 2.1 and will only compile with openGL 3, but mostly 2.1 is sufficient. For example, Godot game engine https://god...
by HeadCase
Fri Mar 29, 2019 12:10 am
Forum: Graphics programming
Topic: Possible memory leak in Anholt driver
Replies: 8
Views: 1187

Re: Possible memory leak in Anholt driver

The Pi 3B+ is using the latest Raspbian image updated to kernel 4.19.23-v7+ #1203 SMP I did the kernel upgrade during bug testing and that did not seem to impact the outcome. The mesa version is the current one supported by the repositories - I did not attempt to rebuild the driver. 2.1 Mesa 13.0.6 ...
by HeadCase
Wed Mar 27, 2019 12:18 pm
Forum: Graphics programming
Topic: Possible memory leak in Anholt driver
Replies: 8
Views: 1187

Possible memory leak in Anholt driver

Maybe James can pass this up to to Eric at some stage. I have been testing the OpenGL driver on Pi using the love2d framework. This compiles to Raspbian and can be loaded from the repositories (although the previous version). The latest love2d 11.2 can be compiled from source fairly easily. The perf...
by HeadCase
Thu Jun 29, 2017 8:52 am
Forum: Graphics programming
Topic: OpenGL - performance of new driver
Replies: 10
Views: 4667

Re: OpenGL - performance of new driver

Just out of interest, I have been doing some experiments with the new driver via love2d and SDL2. From what I can see Anholt's driver is doing some quite clever stuff with updating the X display. Framerate is mostly dependent on how much changes on the screen from frame to frame so there is some goo...
by HeadCase
Fri Jun 23, 2017 8:38 am
Forum: OpenGLES
Topic: OpenGL/SDL2 issue
Replies: 3
Views: 3698

Re: OpenGL/SDL2 issue

The simple way to do it is to first off install love2d from the repositories. This activates the correct version of sdl2, even though it is an older copy of love2d. If you run "love" you will get a software emulated version of OpenGL. Next, activate Anholt's OpenGL driver (fake KMS as the real KMS v...
by HeadCase
Sun Feb 14, 2016 3:41 am
Forum: Graphics programming
Topic: Löve2D
Replies: 21
Views: 13499

Re: Löve2D

With the new OpenGL drivers in Raspbian, Love2d now installs from the repositories and SDL2 also works directly. If you have installed the GLES SDL2 version you will need to remove that and then installing love2d will pull in the version that works with OpenGL. Also, install PulseAudio or you will g...
by HeadCase
Sat Jan 09, 2016 2:17 am
Forum: General discussion
Topic: Pi Zero Availability
Replies: 205
Views: 49758

Re: Pi Zero Availability

One of the most interesting things about this thread is that it reveals many different ways people are looking at the Zero. Given the price, that might be an indicator as to how widely used this thing will be. Here are a few viewpoints people have given. o Useless - doesn't have enough ports o A mar...
by HeadCase
Fri Jan 08, 2016 12:59 pm
Forum: General discussion
Topic: Pi Zero Availability
Replies: 205
Views: 49758

Re: Pi Zero Availability

I wouldn't worry too much - the Raspberry Pi guys didn't come down in the last shower. They obviously know about the way component supply works. The semiconductor industry deals with this all the time by using lead times to manage demand variations. If you order some reels of chips from - say Arrow ...
by HeadCase
Fri Jan 08, 2016 12:31 pm
Forum: General discussion
Topic: KiCad 4.0.1 for Raspbian Jessie
Replies: 7
Views: 4594

Re: KiCad 4.0.1 for Raspbian Jessie

KiCad 4 (and recent releases) use OpenGL to render. The push&shove router is in the OpenGL mode. The old version works without OpenGL, so it is the one loaded from the repositories. In newer versions you use the View Menu to select the graphics mode and sometimes you have to swap modes because not e...
by HeadCase
Fri Jan 08, 2016 1:30 am
Forum: General discussion
Topic: Pi Zero Availability
Replies: 205
Views: 49758

Re: Pi Zero Availability

At the moment the RPi0's must be being hoovered up by people who just want to get their hands on one, so it doesn't matter much about the extra cables or the shipping costs. Most people who want to get a zero probably have hacking or prototyping in mind, and to do that probably 5 or 10 is a realisti...
by HeadCase
Wed Jan 06, 2016 12:21 pm
Forum: General discussion
Topic: Pi Zero Availability
Replies: 205
Views: 49758

Re: Pi Zero Availability

I wonder if anyone has considered the non-technical applications of the RPi0? Jewellery, Key Fobs, clothing. At $5 a lot of people would not think twice about putting a Zero on their keyring - never powered up - just to make your keys easier to pick up and show you are a techie. A belt buckle? Sixte...
by HeadCase
Tue Jan 05, 2016 3:26 pm
Forum: General discussion
Topic: Pi Zero Availability
Replies: 205
Views: 49758

Re: Pi Zero Availability

I finally managed to get one - it only took 5 weeks! Back when the Pi first started I made people laugh when I suggested sales of about 10 million. That doesn't look that crazy now. With the Pi Zero I am thinking more like 50 million - and that could be a vast under estimation. The thing about a $5 ...
by HeadCase
Sun Jan 03, 2016 2:16 am
Forum: Graphics programming
Topic: Löve2D
Replies: 21
Views: 13499

Re: Löve2D

One of the great things about love2d is luajit. For a little machine like the RPi, the amazing performance of luajit can really make a difference. Based on some quite intensive maths operations, converting lua code (with luajit) to C++ only shows a 25% speed increase. That is quite an impressive res...
by HeadCase
Sun Dec 13, 2015 2:56 pm
Forum: Graphics programming
Topic: Löve2D
Replies: 21
Views: 13499

Re: Löve2D

OK, so I can confirm that I have now got the 0.10.0 development branch of Love2d working fully accelerated on the RPi 2 with the latest Raspbian Jessie. It was a nightmare, but it runs (not in X) in GL ES mode full screen accelerated and the Demo (SuperToast) looks absolutely fantastic. The animatio...
by HeadCase
Sat Jul 06, 2013 8:18 am
Forum: Off topic discussion
Topic: Iain M Banks
Replies: 4
Views: 1059

Re: Iain M Banks

For anyone who was a fan of "The Player of Games" with his amazing description of the Fire Planet, here is an interesting link.

https://dl.dropboxusercontent.com/u/57310557/XM3847.png
by HeadCase
Wed Jun 12, 2013 2:30 pm
Forum: Off topic discussion
Topic: Iain M Banks
Replies: 4
Views: 1059

Iain M Banks

Iain (M.) Banks died last weekend. His great imagination and intellect has been an inspiration. His death is a profound loss. For those who have not read his books, he wrote both fiction and science fiction novels. In fiction he dredged the dark and obscure crevasses of the human soul. Alternating w...
by HeadCase
Mon Jul 23, 2012 11:54 am
Forum: Debian
Topic: Lazarus FPC on new Raspbian release
Replies: 8
Views: 2674

Re: Lazarus FPC on new Raspbian release

Lazarus update has now fixed this problem. So far it is working perfectly. Thanks to whoever was responsible.

The lazarus RAD is quite usable with this distro. I hope to try some graphics stuff to see how fast it is.
by HeadCase
Thu Jul 19, 2012 1:46 pm
Forum: Debian
Topic: Lazarus FPC on new Raspbian release
Replies: 8
Views: 2674

Lazarus FPC on new Raspbian release

I just burned an SD card with the new Raspbian wheezy Image. Installing lazarus package proceeds without any errors, but when you run lazarus, you get an error box - missing system.ppu for arm. This is new - the previous non-hf wheezy was good. The Raspbian image was mostly good, but there was a min...
by HeadCase
Thu Jun 21, 2012 12:35 pm
Forum: Other programming languages
Topic: free pascal / lazarus
Replies: 110
Views: 58091

Re: free pascal / lazarus

Just a quick update .. I made a new SD card using the non-Raspbian wheezy and installed Lazarus. Apart from X hanging during the apt-get (install actually completed correctly, so I'm guessing that X windows was the culprit), lazarus came up perfectly. The issue with missing LCL units as mentioned ab...
by HeadCase
Tue Jun 19, 2012 11:20 am
Forum: Other programming languages
Topic: free pascal / lazarus
Replies: 110
Views: 58091

Re: free pascal / lazarus

Nice .. Lazarus now installs from apt-get install lazarus. First time you try and build an empty form you will get an error about missing packages .. it seems that lazarus is allergic to lcl packages that arent compiled on the native hardware. The solution is to start up lazarus as root and rebuild ...

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