https://bugs.freedesktop.org/show_bug.cgi?id=104915
Bug ID: 104915
Summary: Indexed SHADING_LANGUAGE_VERSION query not supported
Product: Mesa
Version: git
Hardware: All
OS: All
Status: NEW
Severity: minor
Priority: medium
Component: Mesa core
Assignee: mesa-dev@lists.freedesktop.org
Reporter: bald...@baldurk.org
QA Contact: mesa-dev@lists.freedesktop.org
Created attachment 137134
--> https://bugs.freedesktop.org/attachment.cgi?id=137134&action=edit
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
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