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https://bugs.freedesktop.org/show_bug.cgi?id=9202
Summary: gluScaleImage's scale_internal function assumes
GL_REPEAT
Product: Mesa
Version: CVS
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P2
Component: GLU
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
There is no verification if the texture is required to be GL_CLAMP /
GL_CLAMP_AT_EDGE / GL_CLAMP_AT_BORDER. It is always GL_REPEAT.
For example, a valid approach for GL_CLAMP_AT_EDGE would be to put:
yindex = yint;
if (yindex < 0) yindex = 0;
else if (yindex >= heightin) yindex = heightin-1;
instead of yindex = (yint + heightin) % heightin;
(mirrored in the x loop of course)
as such, the GL_CLAMP_AT_BORDER could be optimized to set border colors for
outside pixels too. And GL_REPEAT, obviously, should have the much desirable
side effect applied to it.
I don't know the repercussions of such a change, nor what is the "good thing" to
do or how to correct it, or even if it is to be corrected. All I know is this is
invalid behaviour for non-repeatable elements, like fonts or individual user
interface elements.
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