On May 17, 2011, at 11:20 AM, vade wrote:
Hi,
> Hello
>
> I have noticed some rendering issues with Quartz Composer when initting a
> QCRenderer with standard video colorspaces.
>
> Specifically, I am using an ITU Rec. 709 colorspace and providing that as the
> color space to a QC Renderer I create. Most patches and CI Kernels render ok
> but I have issues in the console where images via the image loader, connected
> to a simple billboard fail to render.
>
> The error I receive is:
>
> *** Failed creating texture on <QCOpenGLContext = 0x004DB450 | 2
> rendering patches> from image <QCImage = 0x19205A00 | provider =
> <QCProvider_CoreGraphics = 0x19222D80 | DOD = <QCRegion = 0x1922C370 |
> rectangle = {{0, 0}, {627, 597}}> | colorspace = ICC Based RGB "sRGB
> IEC61966-2.1" <0x188aeb60> | alpha = 1 | native pixel format = (null) |
> native target = (null) | capabilities = 111 > | DOD = <QCRegion = 0x1922C370
> | rectangle = {{0, 0}, {627, 597}}> | transform = (null) | properties = {
> }>
>
>
>
> My gut tells me that the image, being marked as sRGB has a larger gamut than
> Rec 709, and somehow that is causing a color conversion issue?
>
> Is that correct? Should this just work?
I can't think of any cases where color correction would actually cause it to
fail to create the texture. If it doesn't know what to do, I think it will just
choose some reasonable default and look funny. But in this case I think it
should know how to treat Rec 709 so it may be something else causing the
failure. It's probably best to write a bug in this case, and I'm afraid I can't
think of a workaround (being unfamiliar with what could be failing to begin
with.)
Troy
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