AIGLX: Allow 2D driver to prevent zero-copy texturing of a pixmap.
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 .
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glx/glxdri.c
17
glx/glxdri.c
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@ -361,6 +361,21 @@ glxFillAlphaChannel (CARD32 *pixels, CARD32 rowstride, int width, int height)
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}
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}
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static Bool
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testTexOffset(__GLXDRIscreen * const screen, PixmapPtr pPixmap)
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{
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Bool ret;
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if (!screen->texOffsetStart || !screen->texOffset)
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return FALSE;
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__glXenterServer(GL_FALSE);
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ret = screen->texOffsetStart(pPixmap) != ~0ULL;
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__glXleaveServer(GL_FALSE);
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return ret;
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}
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/*
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* (sticking this here for lack of a better place)
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* Known issues with the GLX_EXT_texture_from_pixmap implementation:
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@ -396,7 +411,7 @@ __glXDRIbindTexImage(__GLXcontext *baseContext,
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pixmap = (PixmapPtr) glxPixmap->pDraw;
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if (screen->texOffsetStart && screen->texOffset) {
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if (testTexOffset(screen, pixmap)) {
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__GLXDRIdrawable **texOffsetOverride = screen->texOffsetOverride;
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int i, firstEmpty = 16;
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