Thanks for the suggestions, Stephan and Robert.
I've never used PBOs before, and judging from the header, that is the correct
way to set it up. Once I have the object, is it a simple matter of calling
osg::Texture2D::setImage like:
texture = new osg::Texture2D;
image = new osg::Image;
image->setImage(m_Width, m_Height, 1,
4, GL_RGBA, GL_UNSIGNED_BYTE, m_ImageBuffer,
osg::Image::AllocationMode::NO_DELETE);
image->setPixelBufferObject(new osg::PixelBufferObject(image));
texture->setImage(image);
If this is correct, is there any other setup needed to complete the process?
As for the rendering of the Flash movie, the image buffer is updated via a call
to OleDraw(). The call to OleDraw is made in response to a WM_TIMER message
that the Flash control sends. My current implementation is basically:
OleDraw(...) // draws to a device context which automatically updates the image
buffer, m_ImageBuffer
image->setImage(m_ImageBuffer); // call to osg::Image::setImage
When you say that you "set the movie's context to the image's data", how is
that done?
In regard to using a TextureRectangle, I have tried that approach, but because
I am using a shader to reverse the red and blue pixel components to correct the
coloring, I had trouble getting the shader to cooperate. Plus, I read on
nVidia's web site that fragment shaders are not optimized for non power-of-two
textures. I haven't abandoned this method, but I am curious to know what kind
of performance hit is typically seen?
Thanks,
Brian
On Fri Jan 18 12:37 , Stephan Huber <[EMAIL PROTECTED]> sent:
>Brian schrieb:
>> Is there a faster alternative than using osg::Image::setImage? Or is there
>> a way that I can directly use HDC that the Flash control renders with OSG?
>
>try using PixelBufferObjects this will increase performance when
>uploading the image to the gpu.
> From my head: image->setPixelBufferObject(new
>osg::PixelBufferObject(image));
>
>Is your image power-or-two? You mentioned Texture2D, perhaps
>TextureRectangleRect is better suited.
>
>Perhaps you can render directly into the image's data. When rendering
>quicktime-movies I set up the movie's context to the image's data, no
>need to copy the current frame from one buffer to another. and then
>upload it to the GPU:
>
>
>Hope that helps,
>
>Stephan
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