July 2008 - Pro-apps-dev - lists.apple.com

Re: Why is everything flipped in FCP in the Open GL Context
by Paul Schneider 30 Jul '08

30 Jul '08

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Why is everything flipped in FCP in the Open GL Context
by Brad Wright 30 Jul '08

30 Jul '08

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Render QC direct to FxPlug context
by David Yamnitsky 29 Jul '08

29 Jul '08

site_archiver(a)lists.apple.com Delivered-To: pro-apps-dev(a)lists.apple.com Organization: Boris FX, Inc. Hi, I've been trying to render out Quartz Composer compositions into FxPlug using a QCRenderer, and have had a lot of success by first rendering the composition to an FBO, and then drawing the output to the actual destination. To avoid this unnecessary step, I've been hoping to draw using the QCRenderer directly, and have gotten it working properly in Motion, but in FCP it's been more difficult. First of all, the coordinate system is flipped, so all rendering is flipped (except drawing of the input image (for an FxFilter)). With my FBO implementation, rendering scale, pixel aspect ratio, and half height fields were all handled because I could control the context of the FBO. How would I handle all those directly? I've done several tests and found that the "Rendering Destination Dimensions" in QC do not reflect those considerations. Thanks. _______________________________________________ Do not post admin requests to the list. They will be ignored. Pro-apps-dev mailing list (Pro-apps-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/pro-apps-dev/site_archiver%40lists.a… This email sent to site_archiver(a)lists.apple.com

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Re: How can you get an FxBitmap and display it to an open gl context
by Paul Schneider 28 Jul '08

28 Jul '08

site_archiver(a)lists.apple.com Delivered-To: pro-apps-dev(a)lists.apple.com Hi Brad, I'm not sure what you're asking for. Like Darrin said, what are you really trying to do? - Paul On Jul 25, 2008, at 6:58 PM, Brad Wright wrote: Sent from my iPhone _______________________________________________ Do not post admin requests to the list. They will be ignored. Pro-apps-dev mailing list (Pro-apps-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/pro-apps-dev/pschneider%40apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Pro-apps-dev mailing list (Pro-apps-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/pro-apps-dev/site_archiver%40lists.a… If you have an FxPlug that can only be implemented in software, you can specify that you only work in software in your -frameSetup method. You would then write your output to the output FxBitmap. If you are suggesting that you get more, or different, pixel data when you request a bitmap than when you request a texture, I'd be surprised, and you should definitely file a bug. Again, I'm not sure what you mean by "the raw bitmap data". If you want to draw directly into our display window, you can't do that, and I'm having trouble imagining a scenario where you'd need to. I'm trying to read an FxBitmap and then render it as a texture to the open gl context instead of writing it to the output image. Is this at all possible to get fcp to ignore the output image and just display to the open gl window? I need the raw bitmap data to do analysis of that I can't do with an fxtexture. This email sent to pschneider(a)apple.com This email sent to site_archiver(a)lists.apple.com

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Re: How can you get an FxBitmap and display it to an open gl context
by Darrin Cardani 28 Jul '08

28 Jul '08

site_archiver(a)lists.apple.com Delivered-To: pro-apps-dev(a)lists.apple.com On Jul 25, 2008, at 4:58 PM, Brad Wright wrote: Darrin -- Darrin Cardani dcardani(a)apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Pro-apps-dev mailing list (Pro-apps-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/pro-apps-dev/site_archiver%40lists.a… I'm trying to read an FxBitmap and then render it as a texture to the open gl context instead of writing it to the output image. Is this at all possible to get fcp to ignore the output image and just display to the open gl window? I need the raw bitmap data to do analysis of that I can't do with an fxtexture. Brad, What are you actually trying to do? It's certainly possible to send the image data from an FxBitmap to a texture, but in most circumstances you wouldn't want to. You say in your description above that you need to work on a bitmap because you can't do your analysis on the GPU. Why do you then want to upload the bitmap to a texture? If you don't need to do any additional work on it, it may make more sense to simply return a bitmap to FCP. FCP is more efficient at working with bitmaps than Motion, so it may actually be slowing you down if you then upload the bitmap to a texture to work on it. However, if you do need to do so, you can do something along these lines (from memory, not compiled or tested): UInt8* baseAddr = [bitmap dataPtr]; glTexImage2D (GL_TEXTURE_RECTANGLE_EXT, 0, GL_BGRA, [bitmap width], [bitmap height], 0, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, baseAddr); This email sent to site_archiver(a)lists.apple.com

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How can you get an FxBitmap and display it to an open gl context
by Brad Wright 25 Jul '08

25 Jul '08

site_archiver(a)lists.apple.com Delivered-To: pro-apps-dev(a)lists.apple.com Sent from my iPhone _______________________________________________ Do not post admin requests to the list. They will be ignored. Pro-apps-dev mailing list (Pro-apps-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/pro-apps-dev/site_archiver%40lists.a… I'm trying to read an FxBitmap and then render it as a texture to the open gl context instead of writing it to the output image. Is this at all possible to get fcp to ignore the output image and just display to the open gl window? I need the raw bitmap data to do analysis of that I can't do with an fxtexture. This email sent to site_archiver(a)lists.apple.com

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Re: note on problem reports
by Kristian Harms 25 Jul '08

25 Jul '08

site_archiver(a)lists.apple.com Delivered-To: pro-apps-dev(a)lists.apple.com Okay, but it seems that to provide consistent output for both Motion and FCP, I'll have to premultiply in one host but not the other. No. If you look in FxImage.h in the comment right above the declaration of the FxImageInfo struct, it says: "isPremultiplied YES if the RGB values are premultiplied by the alpha. Should always be YES." Can you confirm that this is the normal way to do this? Also, since I don't seem to get any information with which I can differentiate between the two cases, except -hostIsMotion et al. See above, but I just assume that I always have premultiplied pixels, and don't check for which host application is currently running the plugin. -- Kristian Harms _______________________________________________ Do not post admin requests to the list. They will be ignored. Pro-apps-dev mailing list (Pro-apps-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/pro-apps-dev/site_archiver%40lists.a… Den 24. juli. 2008 kl. 04.52 skrev Steve Christensen: On Jul 22, 2008, at 3:42 AM, Kristian Harms wrote: I actually noticed that, but misinterpreted the statement to mean the opposite, namely "are premultiplied by the host", instead of "should be premultiplied by the plugin". Okay, I'll make these changes to our plugin and see how it turns out. Thanks to all who answered. This email sent to site_archiver(a)lists.apple.com

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Re: pixel types in Motion and FCP
by Darrin Cardani 24 Jul '08

24 Jul '08

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Re: pixel types in Motion and FCP
by Micah Sharp 24 Jul '08

24 Jul '08

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Re: Scope of id attributes
by Helena Ju 24 Jul '08

24 Jul '08

site_archiver(a)lists.apple.com Delivered-To: pro-apps-dev(a)lists.apple.com Hey Bruce, Lotsa good questions! Best Luck! Helena On Jul 24, 2008, at 11:44 AM, Bruce Sharpe wrote: But if id attributes have no existence outside of the XML, then how do I create an affiliate clip in XML? It needs to refer to a masterclipid. As an experiment, I exported an affiliate clip as XML and sure enough it has a masterclipid value that is not defined anywhere else in the XML. If I export the whole project then I can see the clip with that id value. Bruce On Thu, Jul 24, 2008 at 10:00 AM, Gregory Clarke <greg(a)intelligentassistance.com> wrote: Of course, we could be wrong... Greg Thanks, Greg. I think I get the concept of the id, but my question is, if I create one in a component and then import the XML to a project, will there be a problem if the id I have created happens to be the same as one that already existed in the project? Case 2: But it is also possible that the id values that I see when I export the project do exist in the project regardless of whether it has been exported or not. In that case, not only do I need to avoid conflicts when I create an id, but I may be able to reference other project elements through their id. Unless I hear otherwise I am going to assume that Case 1 is true. Bruce On Thu, Jul 24, 2008 at 9:03 AM, Gregory Clarke <greg(a)intelligentassistance.com> wrote: Hi Bruce, The explanation of the id Attribute on p16 of the Final Cut Pro XML should help - it's meant for sharing common info, so it's not meant to be unique. Here's the example from the PDF: Hope that helps, Greg On Jul 24, 2008, at 12:23 AM, Bruce Sharpe wrote: Bruce _______________________________________________ Do not post admin requests to the list. They will be ignored. Pro-apps-dev mailing list (Pro-apps-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/pro-apps-dev/greg%40intelligentassis… _______________________________________________ Do not post admin requests to the list. They will be ignored. Pro-apps-dev mailing list (Pro-apps-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/pro-apps-dev/hju%40apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Pro-apps-dev mailing list (Pro-apps-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/pro-apps-dev/site_archiver%40lists.a… Your approach is right (number (3) anyway), and Gregory Clarke is also right. Ids live only for the duration of an XML file, and in that XML file they are unique. Certainly if you have played around with a project and exported the XML a few times throughout that, you'll see the id change. The masterclip is identified in the XML via the masterclipid, but internally we use other methods to persist the relationship. You can think of the id attribute as a pointer to the object. All of the above being said, how do you use it practically? If you make up a uuid and use it as a 'id' attribute, you won't need to inspect the project to look to make sure your id value will be distinct. OR, you can look at the id attribute on the master clip you'd like to connect an affiliate clip with, and use that. So, barring some new definitive information about this, my strategy will be to: (1) Either not create any new ids, or (2) examine the project XML and choose id values that are distinct from those already used. (3) In any case, if I want to create an affiliate clip, I will assume that it is safe to refer to the masterclipid that shows up in the export of an existing clip. I agree with you that case 1 is probably true. And here's why: don't forget that in FCP a clip is not actually a piece of media, but rather a pointer to a piece of media. Analogous to a QuickTime reference movie rather than a video file. So my guess is that the id attribute is just an XML representation of that same pointer "link" and doesn't exist in the FCP project because QuickTime handles that. Case 1: It is possible that there is no concept of id in a project, it only exists in XML imports and exports. In that case there is no problem. For example, the clip information for a video track in a sequence may be identical to the clip information in an audio track in the same sequence. Rather than repeating this information for both tracks, you can encode it once and then reference the information using the id attribute. Suppose I am creating a clip, sequence or other object in XML with the intention of importing it into an existing project. I want to use id attributes in my object. Do I need to be careful not to conflict with any ids that are already in use in the project? This email sent to greg(a)intelligentassistance.com This email sent to hju(a)apple.com This email sent to site_archiver(a)lists.apple.com

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