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I
iManjunath
Known Participant
April 20, 2010
Answered

How to get the multiple layers data

  • April 20, 2010
  • 1 reply
  • 963 views

Hi,

I have imported two jpg files in a single composition. Please follow this procedure ...

1. created a composition, say its name testCompo

2. Imported a file1.jpg into the project from File --> Import --> file

3. Imported a file2.jpg into the project from File --> Import --> file

4. Drag the both files, file1.jpg and file2.jpg, into the testCompo

Now, I have two layers (one is file1.jpg and onother is file2.jpg) in my testCompo. How can I get the pixel information or pixel data of the

both images (i.e, I mean layers).

I knew that params[0]->u.ld is the first layer data in

EntryPointFunc (
    PF_Cmd            cmd,
    PF_InData        *in_data,
    PF_OutData        *out_data,
    PF_ParamDef        *params[],
    PF_LayerDef        *output,
    void            *extra)

then what about the other layer data? So, finally how can we get the multiple images/layers data in AE?

thanks in advance!!

This topic has been closed for replies.
Correct answer shachar carmi

that's the thing.

you have to have a layer param (lets say it's param number 3).

the user uses that param to select any layer from the comp.

now you checkout param 3.

what you get is a paramDef structure, which contains the pixels of the layer param 3 is pointing to.

you'll find that data at:

paramDef->u.ld.data (or something close to that. i don't have it in front of me)

this way an effect on jpg1 can get the pixels from jpg2 and jpg3. any layer in the comp.

1 reply

S
Community Expert
shachar carmiCommunity Expert
Community Expert
April 20, 2010

if you're writing an EFFECT, you should use a layer param along with PF_CHECKOUT_PARAM.

if you're writing an AEGP, it's a bit more complex.

you should use AEGP_RenderAndCheckoutFrame, for which you'll have to find the project item you refer to.

I
iManjunathAuthor
Known Participant
April 21, 2010

I am developing Effect type plug-in.

you should use a layer param along with PF_CHECKOUT_PARAM.

Before check out a layer param, I should know the index of the layer param. Right?

I knew that zero the based index of PF_ParamDef *params[] is first layer, i.e., file1.jpg data.

But what about the file2.jpg? what is the index of this file2.jpg?

S
Community Expert
shachar carmiCommunity ExpertCorrect answer
Community Expert
April 21, 2010

that's the thing.

you have to have a layer param (lets say it's param number 3).

the user uses that param to select any layer from the comp.

now you checkout param 3.

what you get is a paramDef structure, which contains the pixels of the layer param 3 is pointing to.

you'll find that data at:

paramDef->u.ld.data (or something close to that. i don't have it in front of me)

this way an effect on jpg1 can get the pixels from jpg2 and jpg3. any layer in the comp.

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