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llvmpipe: fix handling of 0 x 0 framebuffer size

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Bump up the size to 1 x 1.  This fixes a number of potential failure
points in the code.

See also http://bugs.freedesktop.org/show_bug.cgi?id=61012
This commit is contained in:
Brian Paul 2013-02-18 10:11:54 -07:00
parent e2091f64cb
commit dfbcb1849c
1 changed files with 2 additions and 2 deletions
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4
src/gallium/drivers/llvmpipe/lp_texture.c
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@ -240,8 +240,8 @@ llvmpipe_displaytarget_layout(struct llvmpipe_screen *screen,
/* Round up the surface size to a multiple of the tile size to
* avoid tile clipping.
*/
const unsigned width = align(lpr->base.width0, TILE_SIZE);
const unsigned height = align(lpr->base.height0, TILE_SIZE);
const unsigned width = MAX2(1, align(lpr->base.width0, TILE_SIZE));
const unsigned height = MAX2(1, align(lpr->base.height0, TILE_SIZE));
const unsigned width_t = width / TILE_SIZE;
const unsigned height_t = height / TILE_SIZE;