<br>Big issue with color channels has been fixed.<br><br>Trying to avoid GL_EXT_gpu_shader4 dependency by using GL_RG and GL_UNSIGNED_BYTE for loading pdp frame.<br>Texture sampling normalization seems to make this impossible as far... How can I make OpenGL map [0, 255] exactly to [0.0, 1.0]?<br>
Tried other texture format options but most other options stress the CPU too much.<br><br><br><br><div class="gmail_quote">On Tue, Feb 21, 2012 at 9:53 AM, Gert De Roost <span dir="ltr"><<a href="mailto:paleajed@gmail.com">paleajed@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Greetings,<br><br>After several days of programming work I can now present this first version of a new external for pdp that hosts FreeFrameGL1.5 plugins.<br>
My first project using C++... slow learning!<br><br>The external does conversion from YUV to RGB and back using fragment shaders. The real bottleneck is the glReadPixels call that copies texture information back to main memory. I managed to implement it using asynchronous pixel buffer DMA, so it doesnt block. Disadvantage is one must wait for the transfer to end (anyone know how I can check for this?) so I wait for the next frame to arrive before writing out the current frame to pdp, so input 1 frame, it outputs only when you input another...<br>
<br>Little testing has been done, and to my understanding there are not many FFGL plugins available (please proof me wrong here), still if anyone could give the external a spin that would be nice. A test file is provided.<br>
<br>The external needs you to have the GL_EXT_gpu_shader4 extension available on your OpenGL system, like I can run it on nVidia here but not on Intel. Any feedback on IF it works at all would be great.<br><br><br>Get the first tarball at: <a href="http://www.ewocprojects.be/pdp_ffgl.html" target="_blank">http://www.ewocprojects.be/pdp_ffgl.html</a><br>
<br><br>Also the visually inclined might check my Pd video mixer EWOCvj at <a href="http://www.ewocprojects.be" target="_blank">http://www.ewocprojects.be</a><br><br>Also I have some code that does video wiping for pdp, check this on the Pd forum.<br>
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