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Just use the shader to generate trapezoid if PolyMode == Imprecise 

The precise mode of trapezoid rendering need to sample the trapezoid on
 the centre points of an (2*n+1)x(2*n-1) subpixel grid. It is computationally
 expensive in shader, and we use inside area ratio to replace it.
 The result has some difference, and we just use it if the polymode == Imprecise.

Signed-off-by: Junyan He <junyan.he@linux.intel.com>
This commit is contained in:
Junyan He 2012-07-20 05:52:50 +08:00 committed by Eric Anholt
parent fe024a7822
commit 9f78e22fa6
1 changed files with 12 additions and 7 deletions
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19
glamor/glamor_trapezoid.c
View File

@ -1664,15 +1664,20 @@ _glamor_trapezoids(CARD8 op,
if(ret)
return TRUE;
} else {
picture = glamor_create_mask_picture(screen, dst, mask_format,
width, height, 1);
if (!picture)
return TRUE;
/* The precise mode is that we sample the trapezoid on the centre points of
an (2*n+1)x(2*n-1) subpixel grid. It is computationally expensive in shader
and we use inside area ratio to replace it if the polymode == Imprecise. */
if(dst->polyMode == PolyModeImprecise) {
picture = glamor_create_mask_picture(screen, dst, mask_format,
width, height, 1);
if (!picture)
return TRUE;
ret = _glamor_generate_trapezoid_with_shader(screen, picture, traps, ntrap, &bounds);
ret = _glamor_generate_trapezoid_with_shader(screen, picture, traps, ntrap, &bounds);
if (!ret)
FreePicture(picture, 0);
if (!ret)
FreePicture(picture, 0);
}
}
#endif