<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - ARB_program_interface_query: glGetProgramResourceiv() returns wrong value for GL_REFERENCED_BY_*_SHADER prop for GL_UNIFORM for members of an interface block with an instance name" href="https://bugs.freedesktop.org/show_bug.cgi?id=90397#c6">Comment # 6</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - ARB_program_interface_query: glGetProgramResourceiv() returns wrong value for GL_REFERENCED_BY_*_SHADER prop for GL_UNIFORM for members of an interface block with an instance name" href="https://bugs.freedesktop.org/show_bug.cgi?id=90397">bug 90397</a> from <a class="email" href="mailto:siglesias@igalia.com" title="Samuel Iglesias <siglesias@igalia.com>"> Samuel Iglesias</a> <pre>(In reply to Tapani Pälli from <a href="show_bug.cgi?id=90397#c5">comment #5</a>) > (In reply to Samuel Iglesias from <a href="show_bug.cgi?id=90397#c4">comment #4</a>) > > I understand that this is referring to uniform/buffer variables but not > > uniform/shader-storage blocks, but I might be wrong. > > > > I would like to have your opinion regarding if it is valid or not spec-wise. > > What do you think? > > > > P.S: Attached to this, it's the patch that fixes this case. > > I'm somewhat surprised if this rule is not be common for all resources. The > text in OpenGL Core 4.5 says (right below function declaration): > > "If name exactly matches the name string of one of the active resources for > programInterface, the index of the matched resource is returned. > Additionally, if > name would exactly match the name string of an active resource if "[0]" were > appended to name, the index of the matched resource is returned. Otherwise, > name > is considered not to be the name of an active resource, and INVALID_INDEX is > returned. > > Note that if an interface enumerates a single active resource list entry for > an array variable (e.g., "a[0]"), a name identifying any array element other > than the first (e.g., "a[1]") is not considered to match." > > Just to make sure I understand correctly, when querying the index for > fs_array_uniform_block[{1,2,3}] you are giving GL_UNIFORM as the interface? Nope, the interface type is GL_UNIFORM_BLOCK. Let me recapitulate, simplifying what I wrote: * I am querying the index for a <programInterface> equals to GL_UNIFORM_BLOCK and for the following names -> fs_array_uniform_block[{1,2,3}]. * The OpenGL Core 4.5 spec snippet you pasted says the same than the ARB_program_interface_query extension spec. * As I said, NVIDIA doesn't give any error. Mesa returns INVALID_INDEX because of valid_program_resource_index_name() function as, for each name, the array index included in the name is not zero (in the example, they are 1, 2 and 3). * I have doubts about what to do in this case, spec-wise. I hope this is clearer now :-) Sam</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>