<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Very slow performance when rendering scenes with transparency, probably caused by excessive copying (intel_miptree_map())" href="https://bugs.freedesktop.org/show_bug.cgi?id=101592#c6">Comment # 6</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Very slow performance when rendering scenes with transparency, probably caused by excessive copying (intel_miptree_map())" href="https://bugs.freedesktop.org/show_bug.cgi?id=101592">bug 101592</a> from <a class="email" href="mailto:lemody@gmail.com" title="Tapani Pälli <lemody@gmail.com>"> Tapani Pälli</a> <pre>(In reply to Steve Holland from <a href="show_bug.cgi?id=101592#c5">comment #5</a>) > It seems like for every character rendered the driver is copying the entire > window image back and forth, mipmapping and unmapping the entire window. Not > at all sure why it is necessary. But I understand the API is rather > obsolete. FWIW I don't think the whole content is copied but as glBitmap() gets called per character basis (which the API forces) it causes a lot of map/unmap of the buffer per each frame where we need to copy those bitmaps in. > Really the the sensible destination for improvement effort would be > freeglut, no? I think GLUT is still a very widely used API. GLUT could be still used but IMO text rendering should be implemented by the app itself and not rely on glutBitmapCharacter(). There are many tutorials/examples (and actually even ready helper libraries) in the web how to get started.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>