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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Indexed SHADING_LANGUAGE_VERSION query not supported"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104915">104915</a>
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<th>Summary</th>
<td>Indexed SHADING_LANGUAGE_VERSION query not supported
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr>
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<th>Version</th>
<td>git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>minor
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Mesa core
</td>
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<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>baldurk@baldurk.org
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>mesa-dev@lists.freedesktop.org
</td>
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<pre>Created <span class=""><a href="attachment.cgi?id=137134" name="attach_137134" title="GLFW sample testing shading language version queries">attachment 137134</a> <a href="attachment.cgi?id=137134&action=edit" title="GLFW sample testing shading language version queries">[details]</a></span>
GLFW sample testing shading language version queries
In GL4.3 the spec added new glGetStringi() query GL_SHADING_LANGUAGE_VERSION,
which allows an application to query a list of supported versions (rather than
just the latest, which glGetString() returns). I don't believe this ever
existed in an extension, only in this new core version.
There are two queries relevant - the GL_SHADING_LANGUAGE_VERSION passed to
glGetStringi(), and then the index ranges from 0 to whatever
glGetIntegerv(GL_NUM_SHADING_LANGUAGE_VERSIONS) returns, which is the other
query.
I've attached a simple program (using glfw for conciseness/clarity) that
exhibits the problem in an isolated run. The important bit though is:
printf("Shading language version: %s\n",
glGetString(GL_SHADING_LANGUAGE_VERSION));
glGetIntegerv(GL_NUM_SHADING_LANGUAGE_VERSIONS, &numLanguages);
printf("%d total languages\n", numLanguages);
for(i = 0; i < numLanguages; i++)
printf("language %d: %s\n", i, glGetStringi(GL_SHADING_LANGUAGE_VERSION,
i));
Actual output:
Shading language version: 4.50
0 total languages
Expected output (something along these lines):
Shading language version: 4.50
10 total languages
language 0: 450 core
language 1: 450 compatibility
language 2: 440 core
language 3: 440 compatibility
language 4: 430 core
language 5: 430 compatibility
language 6: 420 core
language 7: 420 compatibility
language 8: 410 core
language 9: 410 compatibility</pre>
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