From: Marcin Romaszewicz (marcin++at++asmodean.engr.sgi.com)
Date: 04/13/2001 10:58:49
What hardware are you running on? Does performer print out any errors to
the console when your subload fails? Does the subload fail entirely, or do
you subload a 256x256 sub-image?
As for the 5th parameter to subload, that's the width of the image data
you're subloading from in case it does not match your texture width. We
use it to set up the stride through the image.
-- Marcin
On Fri, 13 Apr 2001, Sergio Casas Yrurzum wrote:
>
>
> Hello,
> first of all, many thanks to Stephane Jaeger and Angus Dorbie who helped me
> to capture the framebuffer. Unfortunately, I have another problem..., so I
> hope you can help me again, please.
>
> Well, my problem now is that I can't capture more than 256x256 pixels of
> the framebuffer with the subload() function.
>
>
> In order to make me understand, I'll show a piece of my source code:
>
> ..
> ..
> ..
> pfTexture *texture;
>
> int main()
> {
> ...
> ...
> ...
>
> texture = new pfTexture();
> unsigned int *image;
>
> int sizeTex = 1024;
> image = (unsigned int *)pfMalloc(sizeof(unsigned
> int)*sizeTex*sizeTex,pfGetSharedArena());
>
> texture->setFormat(PFTEX_EXTERNAL_FORMAT,PFTEX_PACK_8);
> texture->setFormat(PFTEX_INTERNAL_FORMAT,PFTEX_RGBA_8);
> texture->setFormat(PFTEX_IMAGE_FORMAT,PFTEX_RGBA);
> texture->setLoadMode(PFTEX_LOAD_SOURCE,PFTEX_SOURCE_IMAGE);
> texture->setName("Frame Buffer Texture");
> texture->setImage(image,4,sizeTex,sizeTex,1);
> texture->setLoadOrigin(PFTEX_ORIGIN_SOURCE, 0, 0);
> texture->setLoadOrigin(PFTEX_ORIGIN_DEST, 0, 0);
> texture->setLoadSize(sizeTex, sizeTex);
> texture->setFormat(PFTEX_SUBLOAD_FORMAT, PF_ON);
> texture->setFilter(PFTEX_MINFILTER, PFTEX_BILINEAR);
> texture->setFilter(PFTEX_MAGFILTER, PFTEX_BILINEAR);
>
> texture->apply();
> texture->format();
> texture->load();
>
> texture->setLoadMode(PFTEX_LOAD_SOURCE, PFTEX_SOURCE_FRAMEBUFFER);
>
> ...
> ...
> ...
> ...
>
> }
>
>
> static void travOriginalChan(pfChannel *chan, void *)
> {
> // draw call-back function of the original channel
>
> chan->clear();
> pfDraw();
>
> texture->subload(PFTEX_SOURCE_FRAMEBUFFER,
> NULL,
> 0,0, /* Source origin */
> 0, /* ???? */
> 0,0, /* Destination origin */
> 1024,1024 /* Subload size */
> );
> }
>
>
> static void travDistortedChannel(pfChannel *chan, void *)
> {
> // draw call-back function of the distorted channel
>
> chan->clear();
> pfDraw();
> }
>
>
> If I change the last two values of the subload() call to ...256,256)
> everythings works OK, but with ...512,512) or ...1024,1024) it doesn't
> work (no subload is made).
>
> By the way, can anyone explain me what means the 5th argument of subload() ?
> Whatever I put there, it seems to be ignored...
>
>
> My window has a 1024x1024 size, and if I made a getImage() before the
> subload(), I read this:
>
> comp = 4
> s = 1024
> t = 1024
> r = 1
>
> so it seems the size of texture is not the problem.
>
> Does anyone know what the hell is happening??
>
>
> Thanks, and sorry about my terrible english!!!
>
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This archive was generated by hypermail 2b29 : Fri Apr 13 2001 - 10:58:52 PDT