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AIGLX: Allow 2D driver to prevent zero-copy texturing of a pixmap.

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The driver can return ~0ULL to achieve this, e.g. if the pixmap doesn't fit
into offscreen storage or if its pixel format isn't supported by the 3D engine
for texturing.

See http://bugs.freedesktop.org/show_bug.cgi?id=17723 or
http://bugs.freedesktop.org/show_bug.cgi?id=12385 .
This commit is contained in:
Michel Dänzer 2008-11-03 10:00:54 +01:00
parent f8af66ddb2
commit a7951a4dad
1 changed files with 16 additions and 1 deletions
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17
glx/glxdri.c
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@ -361,6 +361,21 @@ glxFillAlphaChannel (CARD32 *pixels, CARD32 rowstride, int width, int height)
}
}
static Bool
testTexOffset(__GLXDRIscreen * const screen, PixmapPtr pPixmap)
{
Bool ret;
if (!screen->texOffsetStart || !screen->texOffset)
return FALSE;
__glXenterServer(GL_FALSE);
ret = screen->texOffsetStart(pPixmap) != ~0ULL;
__glXleaveServer(GL_FALSE);
return ret;
}
/*
* (sticking this here for lack of a better place)
* Known issues with the GLX_EXT_texture_from_pixmap implementation:
@ -396,7 +411,7 @@ __glXDRIbindTexImage(__GLXcontext *baseContext,
pixmap = (PixmapPtr) glxPixmap->pDraw;
if (screen->texOffsetStart && screen->texOffset) {
if (testTexOffset(screen, pixmap)) {
__GLXDRIdrawable **texOffsetOverride = screen->texOffsetOverride;
int i, firstEmpty = 16;