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optimize imageshaders to use clamp for dimension==1

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Bug: skia:
Change-Id: I12021acb5349bd139dceee8ce46de3cfd1ff4d28
Reviewed-on: https://skia-review.googlesource.com/20698
Reviewed-by: Herb Derby <herb@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>
This commit is contained in:
Mike Reed 2017-06-23 16:49:12 -04:00 committed by Skia Commit-Bot
parent 6e554e3a10
commit 587d082f50
1 changed files with 10 additions and 2 deletions
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12
src/shaders/SkImageShader.cpp
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@ -18,11 +18,19 @@
#include "SkWriteBuffer.h"
#include "../jumper/SkJumper.h"
/**
* We are faster in clamp, so always use that tiling when we can.
*/
static SkShader::TileMode optimize(SkShader::TileMode tm, int dimension) {
SkASSERT(dimension > 0);
return dimension == 1 ? SkShader::kClamp_TileMode : tm;
}
SkImageShader::SkImageShader(sk_sp<SkImage> img, TileMode tmx, TileMode tmy, const SkMatrix* matrix)
: INHERITED(matrix)
, fImage(std::move(img))
, fTileModeX(tmx)
, fTileModeY(tmy)
, fTileModeX(optimize(tmx, fImage->width()))
, fTileModeY(optimize(tmy, fImage->height()))
{}
sk_sp<SkFlattenable> SkImageShader::CreateProc(SkReadBuffer& buffer) {