Simplify view getters on GrTextureProducer.

The only thing that affects the view returned is whether it ought to
be MIP mapped or not. So don't take a whole GrSamplerState.

The view() function won't ever change the colortype so just query
GrTextureProducer rather than having view() return a tuple.

The rest is transitively reaching through callers and callees of
GrTextureProducer::view() to only pass filter or GrMipMapped instead of
GrSamplerState. Also, some params that indicate whether MIPs are
requested are changed from bool to GrMipMapped. And some minor style
stuff (mainly de-yoda-ifying GrMipMapped checks, using
GrSurfaceProxyView operator bool()).

Change-Id: Ia184aa793cf51d42642ea3bb0521ce06da2efb10
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/274205
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/src/gpu/GrBitmapTextureMaker.cpp b/src/gpu/GrBitmapTextureMaker.cpp
index baff879..a32ec21 100644
--- a/src/gpu/GrBitmapTextureMaker.cpp
+++ b/src/gpu/GrBitmapTextureMaker.cpp
@@ -39,7 +39,7 @@
     }
 }
 
-GrSurfaceProxyView GrBitmapTextureMaker::refOriginalTextureProxyView(bool willBeMipped) {
+GrSurfaceProxyView GrBitmapTextureMaker::refOriginalTextureProxyView(GrMipMapped mipMapped) {
     GrProxyProvider* proxyProvider = this->context()->priv().proxyProvider();
     sk_sp<GrTextureProxy> proxy;
     GrSwizzle swizzle;
@@ -50,7 +50,7 @@
         if (proxy) {
             swizzle = this->context()->priv().caps()->getReadSwizzle(proxy->backendFormat(),
                                                                      this->colorType());
-            if (!willBeMipped || GrMipMapped::kYes == proxy->mipMapped()) {
+            if (mipMapped == GrMipMapped::kNo || proxy->mipMapped() == GrMipMapped::kYes) {
                 return GrSurfaceProxyView(std::move(proxy), kTopLeft_GrSurfaceOrigin, swizzle);
             }
         }
@@ -65,16 +65,14 @@
                 return {};
             }
             copy8888.setImmutable();
-            proxy = proxyProvider->createProxyFromBitmap(
-                    copy8888, willBeMipped ? GrMipMapped::kYes : GrMipMapped::kNo, fFit);
+            proxy = proxyProvider->createProxyFromBitmap(copy8888, mipMapped, fFit);
         } else {
-            proxy = proxyProvider->createProxyFromBitmap(
-                    fBitmap, willBeMipped ? GrMipMapped::kYes : GrMipMapped::kNo, fFit);
+            proxy = proxyProvider->createProxyFromBitmap(fBitmap, mipMapped, fFit);
         }
         if (proxy) {
             swizzle = this->context()->priv().caps()->getReadSwizzle(proxy->backendFormat(),
                                                                      this->colorType());
-            SkASSERT(!willBeMipped || GrMipMapped::kYes == proxy->mipMapped());
+            SkASSERT(mipMapped == GrMipMapped::kNo || proxy->mipMapped() == GrMipMapped::kYes);
             if (fOriginalKey.isValid()) {
                 proxyProvider->assignUniqueKeyToProxy(fOriginalKey, proxy.get());
                 GrInstallBitmapUniqueKeyInvalidator(
@@ -85,8 +83,8 @@
     }
 
     if (proxy) {
-        SkASSERT(willBeMipped);
-        SkASSERT(GrMipMapped::kNo == proxy->mipMapped());
+        SkASSERT(mipMapped == GrMipMapped::kYes);
+        SkASSERT(proxy->mipMapped() == GrMipMapped::kNo);
         SkASSERT(fOriginalKey.isValid());
         // We need a mipped proxy, but we found a proxy earlier that wasn't mipped. Thus we generate
         // a new mipped surface and copy the original proxy into the base layer. We will then let