fb: Handle ZPixmap planemask in GetImage the other way around
Formerly we'd zero the image data and then pull out a plane at a time. It's faster to apply the planemask after the fact, since that turns the GetImage into a memcpy: 100000.0 101000.0 (1.010) (copy 0xaaaaaaaa) ShmGetImage 10x10 square 42400.0 59400.0 (1.401) (copy 0xaaaaaaaa) ShmGetImage 100x100 square 3040.0 5280.0 (1.737) (copy 0xaaaaaaaa) ShmGetImage 500x500 square 96100.0 95200.0 (0.991) (0xaaaaaaaa) GetImage 10x10 square 29600.0 36800.0 (1.243) (0xaaaaaaaa) GetImage 100x100 square 1850.0 2620.0 (1.416) (0xaaaaaaaa) GetImage 500x500 square Measured with Xvfb at depth 24 on Skylake i7-6560U. Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Adam Jackson <ajax@redhat.com>
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@ -233,13 +233,16 @@ fbGetImage(DrawablePtr pDrawable,
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pm = fbReplicatePixel(planeMask, srcBpp);
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dstStride = PixmapBytePad(w, pDrawable->depth);
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if (pm != FB_ALLONES)
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memset(d, 0, dstStride * h);
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dstStride /= sizeof(FbStip);
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fbBltStip((FbStip *) (src + (y + srcYoff) * srcStride),
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FbBitsStrideToStipStride(srcStride),
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(x + srcXoff) * srcBpp,
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dst, dstStride, 0, w * srcBpp, h, GXcopy, pm, srcBpp);
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dst, dstStride, 0, w * srcBpp, h, GXcopy, FB_ALLONES, srcBpp);
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if (pm != FB_ALLONES) {
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for (int i = 0; i < dstStride * h; i++)
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dst[i] &= pm;
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}
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}
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else {
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dstStride = BitmapBytePad(w) / sizeof(FbStip);
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