Avoid creating MIPs until necessary when MIP bias is active

With sharpened mips, the scale at which we begin to sample level 1 is
(obviously) less than 1. This change avoids creation of mips for images
that are only slightly downscaled (and for which we wouldn't have sampled
those MIPs anyway).

Change-Id: If8ffc79c2ce2ff1f3aae7f5732d8a50aca0e26be
Reviewed-on: https://skia-review.googlesource.com/107801
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/src/shaders/SkImageShader.cpp b/src/shaders/SkImageShader.cpp
index debd13b2ef..9f39fe2792 100644
--- a/src/shaders/SkImageShader.cpp
+++ b/src/shaders/SkImageShader.cpp
@@ -201,6 +201,7 @@ void SkImageShader::toString(SkString* str) const {
 
 #include "GrColorSpaceInfo.h"
 #include "GrContext.h"
+#include "GrContextPriv.h"
 #include "SkGr.h"
 #include "effects/GrBicubicEffect.h"
 #include "effects/GrSimpleTextureEffect.h"
@@ -243,7 +244,8 @@ std::unique_ptr<GrFragmentProcessor> SkImageShader::asFragmentProcessor(
     // are provided by the caller.
     bool doBicubic;
     GrSamplerState::Filter textureFilterMode = GrSkFilterQualityToGrFilterMode(
-            args.fFilterQuality, *args.fViewMatrix, lm, &doBicubic);
+            args.fFilterQuality, *args.fViewMatrix, lm,
+            args.fContext->contextPriv().sharpenMipmappedTextures(), &doBicubic);
     GrSamplerState samplerState(wrapModes, textureFilterMode);
     sk_sp<SkColorSpace> texColorSpace;
     SkScalar scaleAdjust[2] = { 1.0f, 1.0f };