<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - [Mesa core] glGetIntegerv(GL_DRAW_BUFFER0) returns wrong buffer enum" href="https://bugs.freedesktop.org/show_bug.cgi?id=13978#c7">Comment # 7</a> on <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - [Mesa core] glGetIntegerv(GL_DRAW_BUFFER0) returns wrong buffer enum" href="https://bugs.freedesktop.org/show_bug.cgi?id=13978">bug 13978</a> from <a class="email" href="mailto:siglesias@igalia.com" title="Samuel Iglesias <siglesias@igalia.com>"> Samuel Iglesias</a> <pre>(In reply to Benjamin Botwin from <a href="show_bug.cgi?id=13978#c6">comment #6</a>) > GL_DRAW_BUFFER0 returns 1029 instead of GL_BACK_LEFT I test it and I have not found anything wrong in Mesa. The initial value for double-buffered contexts is GL_BACK. * See: <a href="https://www.opengl.org/sdk/docs/man4/html/glDrawBuffer.xhtml">https://www.opengl.org/sdk/docs/man4/html/glDrawBuffer.xhtml</a> * Also see: <a href="https://www.opengl.org/sdk/docs/man2/xhtml/glGet.xml">https://www.opengl.org/sdk/docs/man2/xhtml/glGet.xml</a> Search for GL_DRAW_BUFFER. Furthermore, glClearBuffer() doc says the following: "If buffer is GL_COLOR, a particular draw buffer GL_DRAW_BUFFERi is specified by passing i as drawBuffer." As a second parameter of glClearbuffer(), you are passing the value got from glGetIntegeriv() which is wrong. For GL_DRAW_BUFFER0, you should pass a 0. If you do that, the window is cleared with red color once we swap buffers. * See <a href="https://www.opengl.org/sdk/docs/man3/xhtml/glClearBuffer.xml">https://www.opengl.org/sdk/docs/man3/xhtml/glClearBuffer.xml</a></pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>