Finally, unneeded data is discarded. For example, GL_RED discards the green, blue, and alpha components, while GL_RGB discards only the alpha component. GL_LUMINANCE computes a single component value as the sum of the red, green, and blue components, and GL_LUMINANCE_ALPHA does the same,...
That is a nice example for how to use PBOs to upload textures asynchronouly and indicates that the offset parameter for glTexImage2D and glTexSubImage2D was added for that specific reason. However, I don't think it helps with reading pixel data. Sign up for free to join this conversation...
For example, GL_RED discards the green, blue, and alpha components, while GL_RGB discards only the alpha component. GL_LUMINANCE computes a single component value as the sum of the red, green, and blue components, and GL_LUMINANCE_ALPHA does the same, while keeping alpha as a second ...
For example, it seems that the user is obliged to manage the redrawing of the window when another window application is recovering the GLUT window. That is why I am interested in glReadPixels and glDrawPixels functions. Does someone has some experience and advices about this problem ? I...
For example, it seems that the user is obliged to manage the redrawing of the window when another window application is recovering the GLUT window. That is why I am interested in glReadPixels and glDrawPixels functions. Does someone has some experience and advices about this problem ? IN...
I was trying to put together a small stripped down working example but decided I should just post the code snippets for now where the tile picking happens. First the map is loaded into an array and I create two display lists of the data so that I can quickly redraw the map every loop...
the table GL_PIXEL_MAP_c_TO_c, where c again is GL_RED, GL_GREEN, GL_BLUE, and GL_ALPHA. Each component is scaled to the size of its corresponding table before the lookup is performed. Finally, unneeded data is discarded. For example, GL_RED discards the green, blue, and alpha ...
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For example, an APK instead of sources, explicit instructions on how to reliably reproduce the issue, etc. Thank you for your patience Kind Regards, Michael McGeagh Cancel Vote up 0 Vote down Cancel +1 Boian Petkantchin over 9 years ago in re...