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mesa: Allow setting GL_TEXTURE_MAX_LEVEL to 0 with GL_TEXTURE_RECTANGLE. 

Currently, we raise an error when doing this which breaks a conformance
test from the OpenGL samples pack. Even if this is a bit silly it is not
an error.

From http://www.opengl.org/wiki/Rectangle_Texture:

"Rectangle textures contain exactly one image; they cannot have mipmaps.
Therefore, any texture parameters that depend on LODs are irrelevant
when used with rectangle textures; attempting to set these parameters to
any value other than 0 will result in an error."

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76496

Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Iago Toral Quiroga 2014-03-31 02:04:00 -06:00 committed by Brian Paul
parent c13ff5a763
commit f5904b732e
1 changed files with 2 additions and 1 deletions
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3
src/mesa/main/texparam.c
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@ -352,7 +352,8 @@ set_tex_parameteri(struct gl_context *ctx,
if (texObj->MaxLevel == params[0])
return GL_FALSE;
if (params[0] < 0 || texObj->Target == GL_TEXTURE_RECTANGLE_ARB) {
if (params[0] < 0 ||
(texObj->Target == GL_TEXTURE_RECTANGLE_ARB && params[0] > 0)) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glTexParameter(param=%d)", params[0]);
return GL_FALSE;