diff options
| author | Junyan He <junyan.he@linux.intel.com> | 2012-07-20 05:52:50 +0800 |
|---|---|---|
| committer | root <root@fc17.bj.intel.com> | 2012-07-23 11:43:26 +0800 |
| commit | 1f50d3f368c9e7135576ecb376fbaef34fd22132 (patch) | |
| tree | e9bd99139a5cec90f1ed8e40c1254443d968e60e | |
| parent | 1315ff92e2e19811cfb9a8bddab8e40bca5cd4e5 (diff) | |
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>
| -rw-r--r-- | src/glamor_trapezoid.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/src/glamor_trapezoid.c b/src/glamor_trapezoid.c index d7bba66..5c02a8c 100644 --- a/src/glamor_trapezoid.c +++ b/src/glamor_trapezoid.c @@ -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; - - ret = _glamor_generate_trapezoid_with_shader(screen, picture, traps, ntrap, &bounds); - - if (!ret) - FreePicture(picture, 0); + /* 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); + + if (!ret) + FreePicture(picture, 0); + } } #endif |