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500 result(s) matching "", (0.14 seconds)

Images > 4096 Pixels Wide Don't Work with Intel HD Graphics 3000

Dear All,

A little warning that there is some kind of bug in the driver of the Intel HD Graphics 3000, the integrated chip that you use to save power on the more recent MBP. Textures over 4096 pixels across will not render properly. Gory details below, which is a copy of the bug report I submitted to Apple.

The Radeon 6750M works fine with textures up to 8192 pixels.

Best Wishes,

Mark

------------

Dear All,

There seems to be another anomaly in the driver when testing my app against the Radeon 6750M vs. Intel HD Graphics 3000\. This came up whilst trying out a large texture of 6000 x 4500 px. If someone else could confirm this problem, I would appreciate it.

To ensure my textures are valid, I'm doing the following:

1) Checking the resolution against GL_MAX_TEXTURE_SIZE or GL_MAX_RECTANGLE_TEXTURE_SIZE_EXT as appropriate. On both cards, the result of this check is 8192.

2) If the texture size is within those limits, I use GL_PROXY_TEXTURE_2D like so:

glTexImage2D(GL_PROXY_TEXTURE_2D, 0, 4, mTextureWidth, mTextureHeight, 0, mTexFormat, mTexType, NULL);

if (glGetError() == GL_NO_ERROR) {

glGetTexLevelParameteriv(GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &testWidth);

glGetTexLevelParameteriv(GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &testHeight);

}

I then check to ensure testWidth and testHeight are not 0

For both the 6750M and HD Graphics 3000 the results of these tests indicate my 6000 x 4500 pixel texture is fine. So I go about creating it (glTexImage2D create/glTexSubImage2D upload to GPU) and rendering it.

The 6000 x 4500 px texture works on the 6750M, but it doesn't work on the HD Graphics 3000\. Further testing reveals that the upper limit for the HD Graphics 3000 is 4096\. Anything above this fails.

I tried using GL_TEXTURE_2D (POT Textures) instead of GL_TEXTURE_RECTANGLE_ARB but the result was the same.

Here are some snapshots

At 4096 x 3072, Mr. Hubble is happy. (snapshot at http://troikatronix.com/files/hd-graphics-3000-tex-4096x3072.png)

At 4104 x 3072, Mr. Hubble is sad. (snapshot at http://troikatronix.com/files/hd-graphics-3000-tex-4104x3072.png)

At 4360 x 3072, Mr. Hubble is very sad. (snapshot at http://troikatronix.com/files/hd-graphics-3000-tex-4360x3072.png)

It seems like the driver limits the row bytes at 4096\. As you increase the horizontal resolution, it appears that the row bytes are "stuck." Or, that once past 4096, the GPU refuses to accept a data from glTexSubImage2D. Here's a little movie that shows how things increase the resolution from 4096 to 5120:

http://troikatronix.com/files/hd-graphics-3000-test-desktop.m4v

considering the "garbage" that one sees moving up the frame in this movie, I strongly suspect that would seem that the GPU is refusing to load new data into the texture -- it's just using what's already in from the time it worked at 4096.

I quickly modified one of the HeNe tutorials to exhibit this problem. You can download the sample project at http://troikatronix.com/files/simple-opengl-example.zip

All insights and info much appreciated.

Best Wishes,

Mark

posted in Troubleshooting and Bug Reports

Images > 4096 Pixels Wide Don't Work with Intel HD Graphics 3000

Hi Mark,

Did you try to turn off the Automatic graphics switching? That's what I had to do to get past a no CUDA-capable device is detected on my MBP Retina with NVIDIA. System Preferences->Energy Saver ->Automatic graphics switching->Uncheck keeps NVIDIA card active at all times.

--8

posted in Troubleshooting and Bug Reports

Images > 4096 Pixels Wide Don't Work with Intel HD Graphics 3000

Dear Eight,

Well, I'm testing a new Isadora version. I purposely test in both integrated and discrete mode to ensure Izzy plays nice with both. In so doing, I found this bug in the driver itself. So it's not a matter of working around it, it's a matter of submitting a bug to Apple and saying "fix it"!

BTW, to skip the System Preferences thing, you might want to download [gfxCardStatus](http://codykrieger.com/gfxCardStatus). Puts the option for which card you are using right in the menu. Very handy and free.

Best Wishes,

Mark

posted in Troubleshooting and Bug Reports

Images > 4096 Pixels Wide Don't Work with Intel HD Graphics 3000

Hi Mark,

FWIW: I ran your test program on my Retina's integrated HD 4000 (VRAM 512 Mb) -- with the provided texture 6000x4500 it runs fine. I then created a 12000x4500 image and the program crashes with the integrated card, while it still works with the NVIDIA GeForce GT 650M (VRAM 1024 MB)

If my calculation is correct (6000x4500x8 = 216 MB and 12000x4500x8 = 532 MB, assuming 8 bytes per pixel) this behavior is in line with HD 4000 memory rating at 512 MB. If it's 4 bytes per pixel, the 12000x4500 crash would be a surprise, but still could be perhaps explained by the memory overhead a texture requires on the GPU.

--8

posted in Troubleshooting and Bug Reports

Thumbnail resolution

Is there a way to increase the resolution of the thumbnails. And also make there aspect ratio correct? It can be difficult at times.

posted in Troubleshooting and Bug Reports

How do I set text alignment using text/ure?

Is there a way to set the alignment for text/ure? You can do it in Text Draw, but I need the 'line' function to switch between lines of different text.

posted in Troubleshooting and Bug Reports

Luminance control actor

hi everybody!

I havent found an actor which controls only the luminance of a video string.

the hsl adjust actor controls luminance, hue, and saturation, but as far as I understand it also

consums a lot of resources from the computer.

does anybody has an idea how to control luminance with a simpler actor, or has developed

his/her own luminance control actor?

thanks!!!!!

posted in Troubleshooting and Bug Reports

Interface Brightness

Have I missed something?

Is there a way to change the colour and therefore the brightness of the Isadora background? I'm always working in a dark theatre and I find the light grey background of the interface WAY too bright. Yes, I have the computer turned down all the way. Yes, I use ND filters to help me, but it would be really nice to be able to make the back ground a darker grey!

Any thoughts?

Cheers,

Hugh

posted in Troubleshooting and Bug Reports

Thumbnail resolution

I want to also add, these are standard jpegs different sizes from 480 to 1080 in size. You click on the pic thumbnail and it changes to the second monitor out.

posted in Troubleshooting and Bug Reports

Thumbnail resolution

@craigw

This was a question and feature request a while ago in the old forum, see HERE. Maybe its time to send another feature request to push the topic.

Best,
Michel

posted in Troubleshooting and Bug Reports

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