Use samplingoptions for bitmap shader

Change-Id: I64c67ddcac29b68cdd0d25e4af4153358939b0ee
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/343736
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/docs/examples/Canvas_drawPatch.cpp b/docs/examples/Canvas_drawPatch.cpp
index f5c0ef3..cb2c853 100644
--- a/docs/examples/Canvas_drawPatch.cpp
+++ b/docs/examples/Canvas_drawPatch.cpp
@@ -6,7 +6,6 @@
 void draw(SkCanvas* canvas) {
     // SkBitmap source = cmbkygk;
     SkPaint paint;
-    paint.setFilterQuality(kLow_SkFilterQuality);
     paint.setAntiAlias(true);
     SkPoint cubics[] = { { 3, 1 },    { 4, 2 }, { 5, 1 },    { 7, 3 },
                       /* { 7, 3 }, */ { 6, 4 }, { 7, 5 },    { 5, 7 },
@@ -14,7 +13,8 @@
                       /* { 1, 5 }, */ { 2, 4 }, { 1, 3 }, /* { 3, 1 } */ };
     SkColor colors[] = { 0xbfff0000, 0xbf0000ff, 0xbfff00ff, 0xbf00ffff };
     SkPoint texCoords[] = { { -30, -30 }, { 162, -30}, { 162, 162}, { -30, 162} };
-    paint.setShader(source.makeShader());
+    paint.setShader(source.makeShader(SkSamplingOptions(SkFilterMode::kLinear,
+                                                        SkMipmapMode::kNone)));
     canvas->scale(15, 15);
     for (auto blend : { SkBlendMode::kSrcOver, SkBlendMode::kModulate, SkBlendMode::kXor } ) {
         canvas->drawPatch(cubics, colors, texCoords, blend, paint);