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xlib: use _mesa_generate_mipmap() for mipmap generation, not meta

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The swrast fragment program interpreter has trouble computing the
right texture LOD because it doesn't have easy access to input
derivatives.  This causes the GLSL-based meta generate mipmap code
to fetch texels from the wrong mipmap level.

One possible fix would be to set the GL_TEXTURE_MIN/MAX_LOD parameters
to limit sampling from the right level.  But let's just use the
_mesa_generate_mipmap() fallback since it's a lot faster than using
the fragment shader interpreter.

Fixes http://bugs.freedesktop.org/show_bug.cgi?id=54240

Note: This is a candidate for the 9.0 branch.

Reviewed-by: José Fonseca <jfonseca@vmware.com>
This commit is contained in:
Brian Paul 2013-01-26 10:58:37 -07:00
parent d60da27273
commit 89551ae04f
1 changed files with 3 additions and 0 deletions
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3
src/mesa/drivers/x11/xm_dd.c
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@ -34,6 +34,7 @@
#include "main/colormac.h"
#include "main/fbobject.h"
#include "main/macros.h"
#include "main/mipmap.h"
#include "main/image.h"
#include "main/imports.h"
#include "main/mtypes.h"
@ -869,6 +870,8 @@ xmesa_init_driver_functions( XMesaVisual xmvisual,
driver->MapRenderbuffer = xmesa_MapRenderbuffer;
driver->UnmapRenderbuffer = xmesa_UnmapRenderbuffer;
driver->GenerateMipmap = _mesa_generate_mipmap;
#if ENABLE_EXT_timer_query
driver->NewQueryObject = xmesa_new_query_object;
driver->BeginQuery = xmesa_begin_query;