<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Samplers referring to the same texture unit with different types should raise GL_INVALID_OPERATION" href="https://bugs.freedesktop.org/show_bug.cgi?id=97524#c14">Comment # 14</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Samplers referring to the same texture unit with different types should raise GL_INVALID_OPERATION" href="https://bugs.freedesktop.org/show_bug.cgi?id=97524">bug 97524</a> from <a class="email" href="mailto:dark_sylinc@yahoo.com.ar" title="Matias N. Goldberg <dark_sylinc@yahoo.com.ar>"> Matias N. Goldberg</a> <pre>Dang it! You're right. I forgot GL allows (requires?) changing sampler values after the shader is compiled. As for glValidateProgram, our actual software (not this sample) would often warn about sampler collisions due to a bug in our code where all the samplers would initially be set to 0, but we later correct it and thus still works fine afterwards. <a href="https://www.khronos.org/opengles/sdk/docs/man/xhtml/glValidateProgram.xml">https://www.khronos.org/opengles/sdk/docs/man/xhtml/glValidateProgram.xml</a> I know the docs isn't the spec, but this is relevant nonetheless: "The error GL_INVALID_OPERATION will be generated by glDrawArrays or glDrawElements if any two active samplers in the current program object are of different types, but refer to the same texture image unit."</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>