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Optimize SkTileImageFilter in an offset filter when possible.

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If the srcRect and dstRect have the same size, tiling will have the
same effect as an offset filter cropped to the intersection of
srcRect and dstRect. So do that instead.

BUG=569950
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1578983002

Review URL: https://codereview.chromium.org/1578983002
This commit is contained in:
senorblanco 2016-01-12 07:49:15 -08:00 committed by Commit bot
parent c63a0f8fe5
commit 05dcb4c7a9
1 changed files with 11 additions and 0 deletions
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11
src/effects/SkTileImageFilter.cpp
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@ -9,6 +9,7 @@
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkDevice.h"
#include "SkOffsetImageFilter.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
#include "SkMatrix.h"
@ -21,6 +22,16 @@ SkImageFilter* SkTileImageFilter::Create(const SkRect& srcRect, const SkRect& ds
if (!SkIsValidRect(srcRect) || !SkIsValidRect(dstRect)) {
return nullptr;
}
if (srcRect.width() == dstRect.width() && srcRect.height() == dstRect.height()) {
SkRect ir = dstRect;
if (!ir.intersect(srcRect)) {
return SkSafeRef(input);
}
CropRect cropRect(ir);
return SkOffsetImageFilter::Create(dstRect.x() - srcRect.x(),
dstRect.y() - srcRect.y(),
input, &cropRect);
}
return new SkTileImageFilter(srcRect, dstRect, input);
}