Revert "Widen internal API to support more complex YUV formats"

This reverts commit 0c583af06d50cf3a11a39f5804eccdeefd74fc02.

Reason for revert: DDL is failing

Original change's description:
> Widen internal API to support more complex YUV formats
> 
> Bug: skia:7901
> Change-Id: I46fec08711b8b483cf58ccae733e4dc2a9689231
> Reviewed-on: https://skia-review.googlesource.com/c/162280
> Commit-Queue: Jim Van Verth <jvanverth@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>

TBR=egdaniel@google.com,jvanverth@google.com,bsalomon@google.com

Change-Id: Ibe3dd7abbce4a3b6afe74c565198dadc61a9f439
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:7901
Reviewed-on: https://skia-review.googlesource.com/c/163257
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
diff --git a/gm/wacky_yuv_formats.cpp b/gm/wacky_yuv_formats.cpp
index 0b959cb..0cc0a21 100644
--- a/gm/wacky_yuv_formats.cpp
+++ b/gm/wacky_yuv_formats.cpp
@@ -495,18 +495,29 @@
 class YUVGenerator : public SkImageGenerator {
 public:
     YUVGenerator(const SkImageInfo& ii,
+                 YUVFormat yuvFormat,
                  SkYUVColorSpace yuvColorSpace,
-                 SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
-                 SkBitmap bitmaps[SkYUVSizeInfo::kMaxCount])
+                 SkYUVAIndex yuvaIndices[4],
+                 SkBitmap bitmaps[4])
             : SkImageGenerator(ii)
+            , fYUVFormat(yuvFormat)
             , fYUVColorSpace(yuvColorSpace) {
         memcpy(fYUVAIndices, yuvaIndices, sizeof(fYUVAIndices));
 
-        SkAssertResult(SkYUVAIndex::AreValidIndices(fYUVAIndices, &fNumBitmaps));
-        SkASSERT(fNumBitmaps > 0 && fNumBitmaps <= SkYUVSizeInfo::kMaxCount);
+        bool used[4] = { false, false, false, false };
+        for (int i = 0; i < 4; ++i) {
+            if (yuvaIndices[i].fIndex >= 0) {
+                SkASSERT(yuvaIndices[i].fIndex < 4);
+                used[yuvaIndices[i].fIndex] = true;
+            } else {
+                SkASSERT(3 == i); // only the 'A' channel can be unspecified
+            }
+        }
 
-        for (int i = 0; i < fNumBitmaps; ++i) {
-            fYUVBitmaps[i] = bitmaps[i];
+        for (int i = 0; i < 4; ++i) {
+            if (used[i]) {
+                fYUVBitmaps[i] = bitmaps[i];
+            }
         }
     }
 
@@ -562,53 +573,49 @@
         return fFlattened.readPixels(info, pixels, rowBytes, 0, 0);
     }
 
-    bool onQueryYUVA8(SkYUVSizeInfo* size,
-                      SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
-                      SkYUVColorSpace* yuvColorSpace) const override {
+    bool onQueryYUV8(SkYUVSizeInfo* size, SkYUVColorSpace* yuvColorSpace) const override {
+        if (kI420_YUVFormat != fYUVFormat && kYV12_YUVFormat != fYUVFormat) {
+            return false; // currently this API only supports planar formats
+        }
 
-        memcpy(yuvaIndices, fYUVAIndices, sizeof(fYUVAIndices));
         *yuvColorSpace = fYUVColorSpace;
+        size->fSizes[0].fWidth = fYUVBitmaps[fYUVAIndices[0].fIndex].width();
+        size->fSizes[0].fHeight = fYUVBitmaps[fYUVAIndices[0].fIndex].height();
+        size->fWidthBytes[0] = fYUVBitmaps[fYUVAIndices[0].fIndex].rowBytes();
 
-        int i = 0;
-        for ( ; i < fNumBitmaps; ++i) {
-            size->fColorTypes[i] = fYUVBitmaps[i].colorType();
-            size->fSizes[i].fWidth = fYUVBitmaps[i].width();
-            size->fSizes[i].fHeight = fYUVBitmaps[i].height();
-            size->fWidthBytes[i] = fYUVBitmaps[i].rowBytes();
-        }
-        for ( ; i < SkYUVSizeInfo::kMaxCount; ++i) {
-            size->fColorTypes[i] = kUnknown_SkColorType;
-            size->fSizes[i].fWidth = 0;
-            size->fSizes[i].fHeight = 0;
-            size->fWidthBytes[i] = 0;
-        }
+        size->fSizes[1].fWidth = fYUVBitmaps[fYUVAIndices[1].fIndex].width();
+        size->fSizes[1].fHeight = fYUVBitmaps[fYUVAIndices[1].fIndex].height();
+        size->fWidthBytes[1] = fYUVBitmaps[fYUVAIndices[1].fIndex].rowBytes();
 
+        size->fSizes[2].fWidth = fYUVBitmaps[fYUVAIndices[2].fIndex].width();
+        size->fSizes[2].fHeight = fYUVBitmaps[fYUVAIndices[2].fIndex].height();
+        size->fWidthBytes[2] = fYUVBitmaps[fYUVAIndices[2].fIndex].rowBytes();
         return true;
     }
 
-    bool onGetYUVA8Planes(const SkYUVSizeInfo&, const SkYUVAIndex[SkYUVAIndex::kIndexCount],
-                          void* planes[SkYUVSizeInfo::kMaxCount]) override {
-        for (int i = 0; i < fNumBitmaps; ++i) {
-            planes[i] = fYUVBitmaps[i].getPixels();
-        }
+    bool onGetYUV8Planes(const SkYUVSizeInfo&, void* planes[3]) override {
+        planes[0] = fYUVBitmaps[fYUVAIndices[0].fIndex].getAddr(0, 0);
+        planes[1] = fYUVBitmaps[fYUVAIndices[1].fIndex].getAddr(0, 0);
+        planes[2] = fYUVBitmaps[fYUVAIndices[2].fIndex].getAddr(0, 0);
         return true;
     }
 
 private:
+    YUVFormat       fYUVFormat;
     SkYUVColorSpace fYUVColorSpace;
-    SkYUVAIndex     fYUVAIndices[SkYUVAIndex::kIndexCount];
-    int             fNumBitmaps;
-    SkBitmap        fYUVBitmaps[SkYUVSizeInfo::kMaxCount];
+    SkYUVAIndex     fYUVAIndices[4];
+    SkBitmap        fYUVBitmaps[4];
     SkBitmap        fFlattened;
 
 };
 
 static sk_sp<SkImage> make_yuv_gen_image(const SkImageInfo& ii,
+                                         YUVFormat yuvFormat,
                                          SkYUVColorSpace yuvColorSpace,
-                                         SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
+                                         SkYUVAIndex yuvaIndices[4],
                                          SkBitmap bitmaps[]) {
-    std::unique_ptr<SkImageGenerator> gen(new YUVGenerator(ii, yuvColorSpace,
-                                                           yuvaIndices, bitmaps));
+     std::unique_ptr<SkImageGenerator> gen(new YUVGenerator(ii, yuvFormat, yuvColorSpace,
+                                                            yuvaIndices, bitmaps));
 
     return SkImage::MakeFromGenerator(std::move(gen));
 }
@@ -767,6 +774,7 @@
                     {
                         fImages[opaque][cs][format] = make_yuv_gen_image(
                                                                 fOriginalBMs[opaque].info(),
+                                                                (YUVFormat) format,
                                                                 (SkYUVColorSpace) cs,
                                                                 yuvaIndices,
                                                                 resultBMs);
diff --git a/gn/core.gni b/gn/core.gni
index 4e51c27..f7341a3 100644
--- a/gn/core.gni
+++ b/gn/core.gni
@@ -327,7 +327,6 @@
   "$_src/core/SkXfermodeInterpretation.h",
   "$_src/core/SkYUVPlanesCache.cpp",
   "$_src/core/SkYUVPlanesCache.h",
-  "$_src/core/SkYUVSizeInfo.cpp",
 
   "$_src/image/SkImage.cpp",
 
@@ -420,7 +419,6 @@
   "$_include/core/SkUnPreMultiply.h",
   "$_include/core/SkVertices.h",
   "$_include/core/SkYUVAIndex.h",
-  "$_include/core/SkYUVSizeInfo.h",
 
   "$_src/jumper/SkJumper.cpp",
 
diff --git a/include/codec/SkCodec.h b/include/codec/SkCodec.h
index 7f81399..b0287a8 100644
--- a/include/codec/SkCodec.h
+++ b/include/codec/SkCodec.h
@@ -351,9 +351,7 @@
      *  returns false and does not modify any of the parameters.
      *
      *  @param sizeInfo   Output parameter indicating the sizes and required
-     *                    allocation widths of the Y, U, V, and A planes. Given current codec
-     *                    limitations the size of the A plane will always be 0 and the Y, U, V
-     *                    channels will always be planar.
+     *                    allocation widths of the Y, U, and V planes.
      *  @param colorSpace Output parameter.  If non-NULL this is set to kJPEG,
      *                    otherwise this is ignored.
      */
@@ -362,19 +360,7 @@
             return false;
         }
 
-        bool result = this->onQueryYUV8(sizeInfo, colorSpace);
-        if (result) {
-            for (int i = 0; i <= 2; ++i) {
-                SkASSERT(kAlpha_8_SkColorType == sizeInfo->fColorTypes[i]);
-                SkASSERT(sizeInfo->fSizes[i].fWidth > 0 && sizeInfo->fSizes[i].fHeight > 0 &&
-                         sizeInfo->fWidthBytes[i] > 0);
-            }
-            SkASSERT(kUnknown_SkColorType == sizeInfo->fColorTypes[3]);
-            SkASSERT(!sizeInfo->fSizes[3].fWidth &&
-                     !sizeInfo->fSizes[3].fHeight &&
-                     !sizeInfo->fWidthBytes[3]);
-        }
-        return result;
+        return this->onQueryYUV8(sizeInfo, colorSpace);
     }
 
     /**
@@ -387,12 +373,11 @@
      *                    recommendation (but not smaller).
      *  @param planes     Memory for each of the Y, U, and V planes.
      */
-    Result getYUV8Planes(const SkYUVSizeInfo& sizeInfo, void* planes[SkYUVSizeInfo::kMaxCount]) {
-        if (!planes || !planes[0] || !planes[1] || !planes[2]) {
+    Result getYUV8Planes(const SkYUVSizeInfo& sizeInfo, void* planes[3]) {
+        if (nullptr == planes || nullptr == planes[0] || nullptr == planes[1] ||
+                nullptr == planes[2]) {
             return kInvalidInput;
         }
-        SkASSERT(kUnknown_SkColorType == sizeInfo.fColorTypes[3]);
-        SkASSERT(!planes[3]); // TODO: is this a fair assumption?
 
         if (!this->rewindIfNeeded()) {
             return kCouldNotRewind;
@@ -727,8 +712,7 @@
         return false;
     }
 
-    virtual Result onGetYUV8Planes(const SkYUVSizeInfo&,
-                                   void*[SkYUVSizeInfo::kMaxCount] /*planes*/) {
+    virtual Result onGetYUV8Planes(const SkYUVSizeInfo&, void*[3] /*planes*/) {
         return kUnimplemented;
     }
 
diff --git a/include/core/SkImageGenerator.h b/include/core/SkImageGenerator.h
index 646d6d5..9c7c9a2 100644
--- a/include/core/SkImageGenerator.h
+++ b/include/core/SkImageGenerator.h
@@ -86,30 +86,23 @@
      *  If decoding to YUV is supported, this returns true.  Otherwise, this
      *  returns false and does not modify any of the parameters.
      *
-     *  @param sizeInfo    Output parameter indicating the sizes and required
-     *                     allocation widths of the Y, U, V, and A planes.
-     *  @param yuvaIndices How the YUVA planes are organized/used
-     *  @param colorSpace  Output parameter.
+     *  @param sizeInfo   Output parameter indicating the sizes and required
+     *                    allocation widths of the Y, U, and V planes.
+     *  @param colorSpace Output parameter.
      */
-    bool queryYUVA8(SkYUVSizeInfo* sizeInfo,
-                    SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
-                    SkYUVColorSpace* colorSpace) const;
+    bool queryYUV8(SkYUVSizeInfo* sizeInfo, SkYUVColorSpace* colorSpace) const;
 
     /**
      *  Returns true on success and false on failure.
      *  This always attempts to perform a full decode.  If the client only
-     *  wants size, it should call queryYUVA8().
+     *  wants size, it should call queryYUV8().
      *
-     *  @param sizeInfo    Needs to exactly match the values returned by the
-     *                     query, except the WidthBytes may be larger than the
-     *                     recommendation (but not smaller).
-     *  @param yuvaIndices Needs to exactly match the values returned by the query.
-     *  @param planes      Memory for the Y, U, V, and A planes. Note that, depending on the
-     *                     settings in yuvaIndices, anywhere from 1..4 planes could be returned.
+     *  @param sizeInfo   Needs to exactly match the values returned by the
+     *                    query, except the WidthBytes may be larger than the
+     *                    recommendation (but not smaller).
+     *  @param planes     Memory for each of the Y, U, and V planes.
      */
-    bool getYUVA8Planes(const SkYUVSizeInfo& sizeInfo,
-                        const SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
-                        void* planes[]);
+    bool getYUV8Planes(const SkYUVSizeInfo& sizeInfo, void* planes[3]);
 
 #if SK_SUPPORT_GPU
     /**
@@ -170,13 +163,9 @@
     struct Options {};
     virtual bool onGetPixels(const SkImageInfo&, void*, size_t, const Options&) { return false; }
     virtual bool onIsValid(GrContext*) const { return true; }
-    virtual bool onQueryYUVA8(SkYUVSizeInfo*, SkYUVAIndex[SkYUVAIndex::kIndexCount],
-                              SkYUVColorSpace*) const { return false; }
-    virtual bool onGetYUVA8Planes(const SkYUVSizeInfo&, const SkYUVAIndex[SkYUVAIndex::kIndexCount],
-                                  void*[4] /*planes*/) { return false; }
-    // Deprecated methods
     virtual bool onQueryYUV8(SkYUVSizeInfo*, SkYUVColorSpace*) const { return false; }
     virtual bool onGetYUV8Planes(const SkYUVSizeInfo&, void*[3] /*planes*/) { return false; }
+
 #if SK_SUPPORT_GPU
     enum class TexGenType {
         kNone,           //image generator does not implement onGenerateTexture
diff --git a/include/core/SkYUVAIndex.h b/include/core/SkYUVAIndex.h
index f52786c..7cb8cf1 100644
--- a/include/core/SkYUVAIndex.h
+++ b/include/core/SkYUVAIndex.h
@@ -38,16 +38,12 @@
     }
 
     // Index in the array of SkYUVAIndex
-    // TODO: rename as Component
     enum Index {
         kY_Index = 0,
         kU_Index = 1,
         kV_Index = 2,
-        kA_Index = 3,
-
-        kLast_Index = kA_Index
+        kA_Index = 3
     };
-    static constexpr int kIndexCount = kLast_Index + 1;
 
     /** The index is a number between -1..3 which definies which image source to read from, where -1
      * means the image source doesn't exist. The assumption is we will always have image sources for
diff --git a/include/core/SkYUVASizeInfo.h b/include/core/SkYUVASizeInfo.h
deleted file mode 100644
index c6a413f..0000000
--- a/include/core/SkYUVASizeInfo.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef SkYUVASizeInfo_DEFINED
-#define SkYUVASizeInfo_DEFINED
-
-#include "SkYUVSizeInfo.h"
-
-using SkYUVASizeInfo = SkYUVSizeInfo;
-
-#endif // SkYUVASizeInfo_DEFINED
diff --git a/include/core/SkYUVSizeInfo.h b/include/core/SkYUVSizeInfo.h
index a882e2d..fc2ceba 100644
--- a/include/core/SkYUVSizeInfo.h
+++ b/include/core/SkYUVSizeInfo.h
@@ -8,18 +8,18 @@
 #ifndef SkYUVSizeInfo_DEFINED
 #define SkYUVSizeInfo_DEFINED
 
-#include "SkImageInfo.h"
 #include "SkSize.h"
-#include "SkYUVAIndex.h"
 
 struct SkYUVSizeInfo {
-    static constexpr auto kMaxCount = 4;
-
-    SkColorType fColorTypes[kMaxCount];
-    SkISize     fSizes[kMaxCount];
+    enum YUVIndex {
+        kY          = 0,
+        kU          = 1,
+        kV          = 2,
+    };
+    SkISize fSizes[3];
 
     /**
-     * While the widths of the Y, U, V and A planes are not restricted, the
+     * While the widths of the Y, U, and V planes are not restricted, the
      * implementation often requires that the width of the memory allocated
      * for each plane be a multiple of 8.
      *
@@ -30,44 +30,7 @@
      * include any extra padding, while, in this case, every single row of
      * the allocation must be at least "widthBytes".
      */
-    size_t      fWidthBytes[kMaxCount];
-
-    bool operator==(const SkYUVSizeInfo& that) const {
-        for (int i = 0; i < kMaxCount; ++i) {
-            if (fColorTypes[i] != that.fColorTypes[i]) {
-                return false;
-            }
-
-            if (kUnknown_SkColorType == fColorTypes[i]) {
-                SkASSERT(!fSizes[i].fWidth && !fSizes[i].fHeight && !fWidthBytes[i]);
-                SkASSERT(!that.fSizes[i].fWidth && !that.fSizes[i].fHeight && !that.fWidthBytes[i]);
-                continue;
-            }
-
-            SkASSERT(fSizes[i].fWidth && fSizes[i].fHeight && fWidthBytes[i]);
-            if (fSizes[i] != that.fSizes[i] || fWidthBytes[i] != that.fWidthBytes[i]) {
-                return false;
-            }
-        }
-
-        return true;
-    }
-
-    size_t computeTotalBytes() const {
-        size_t totalBytes = 0;
-
-        for (int i = 0; i < kMaxCount; ++i) {
-            SkASSERT(kUnknown_SkColorType != fColorTypes[i] ||
-                        (!fSizes[i].fWidth && !fSizes[i].fHeight && !fWidthBytes[i]));
-
-            totalBytes += fWidthBytes[i] * fSizes[i].height();
-        }
-
-        return totalBytes;
-    }
-
-    void computePlanes(void* base, void* planes[kMaxCount]) const;
-
+    size_t fWidthBytes[3];
 };
 
 #endif // SkYUVSizeInfo_DEFINED
diff --git a/src/codec/SkCodecImageGenerator.cpp b/src/codec/SkCodecImageGenerator.cpp
index 3005ee3..55a6575 100644
--- a/src/codec/SkCodecImageGenerator.cpp
+++ b/src/codec/SkCodecImageGenerator.cpp
@@ -8,7 +8,6 @@
 #include "SkCodecImageGenerator.h"
 #include "SkMakeUnique.h"
 #include "SkPixmapPriv.h"
-#include "SkYUVAIndex.h"
 
 std::unique_ptr<SkImageGenerator> SkCodecImageGenerator::MakeFromEncodedCodec(sk_sp<SkData> data) {
     auto codec = SkCodec::MakeFromData(data);
@@ -59,27 +58,13 @@
     return SkPixmapPriv::Orient(dst, fCodec->getOrigin(), decode);
 }
 
-bool SkCodecImageGenerator::onQueryYUVA8(SkYUVSizeInfo* sizeInfo,
-                                         SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
-                                         SkYUVColorSpace* colorSpace) const {
-    // This image generator always returns 3 separate non-interleaved planes
-    yuvaIndices[SkYUVAIndex::kY_Index].fIndex = 0;
-    yuvaIndices[SkYUVAIndex::kY_Index].fChannel = SkColorChannel::kR;
-    yuvaIndices[SkYUVAIndex::kU_Index].fIndex = 1;
-    yuvaIndices[SkYUVAIndex::kU_Index].fChannel = SkColorChannel::kR;
-    yuvaIndices[SkYUVAIndex::kV_Index].fIndex = 2;
-    yuvaIndices[SkYUVAIndex::kV_Index].fChannel = SkColorChannel::kR;
-    yuvaIndices[SkYUVAIndex::kA_Index].fIndex = -1;
-    yuvaIndices[SkYUVAIndex::kA_Index].fChannel = SkColorChannel::kR;
-
+bool SkCodecImageGenerator::onQueryYUV8(SkYUVSizeInfo* sizeInfo, SkYUVColorSpace* colorSpace) const
+{
     return fCodec->queryYUV8(sizeInfo, colorSpace);
 }
 
-bool SkCodecImageGenerator::onGetYUVA8Planes(const SkYUVSizeInfo& sizeInfo,
-                                             const SkYUVAIndex indices[SkYUVAIndex::kIndexCount],
-                                             void* planes[]) {
+bool SkCodecImageGenerator::onGetYUV8Planes(const SkYUVSizeInfo& sizeInfo, void* planes[3]) {
     SkCodec::Result result = fCodec->getYUV8Planes(sizeInfo, planes);
-    // TODO: check indices
 
     switch (result) {
         case SkCodec::kSuccess:
diff --git a/src/codec/SkCodecImageGenerator.h b/src/codec/SkCodecImageGenerator.h
index 9a64b7c..b9c9d3c 100644
--- a/src/codec/SkCodecImageGenerator.h
+++ b/src/codec/SkCodecImageGenerator.h
@@ -22,14 +22,12 @@
 protected:
     sk_sp<SkData> onRefEncodedData() override;
 
-    bool onGetPixels(
-        const SkImageInfo& info, void* pixels, size_t rowBytes, const Options& opts) override;
+    bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, const Options& opts)
+                     override;
 
-    bool onQueryYUVA8(
-        SkYUVSizeInfo*, SkYUVAIndex[SkYUVAIndex::kIndexCount], SkYUVColorSpace*) const override;
+    bool onQueryYUV8(SkYUVSizeInfo*, SkYUVColorSpace*) const override;
 
-    bool onGetYUVA8Planes(const SkYUVSizeInfo&, const SkYUVAIndex[SkYUVAIndex::kIndexCount],
-                          void* planes[]) override;
+    bool onGetYUV8Planes(const SkYUVSizeInfo&, void* planes[3]) override;
 
 private:
     /*
diff --git a/src/codec/SkJpegCodec.cpp b/src/codec/SkJpegCodec.cpp
index f5c23a2..257b764 100644
--- a/src/codec/SkJpegCodec.cpp
+++ b/src/codec/SkJpegCodec.cpp
@@ -831,18 +831,11 @@
     }
 
     jpeg_component_info * comp_info = dinfo->comp_info;
-    for (auto i : { SkYUVAIndex::kY_Index, SkYUVAIndex::kU_Index, SkYUVAIndex::kV_Index }) {
-        sizeInfo->fColorTypes[i] = kAlpha_8_SkColorType;
+    for (auto i : { SkYUVSizeInfo::kY, SkYUVSizeInfo::kU, SkYUVSizeInfo::kV }) {
         sizeInfo->fSizes[i].set(comp_info[i].downsampled_width, comp_info[i].downsampled_height);
         sizeInfo->fWidthBytes[i] = comp_info[i].width_in_blocks * DCTSIZE;
     }
 
-    // JPEG never has an alpha channel
-    sizeInfo->fColorTypes[SkYUVAIndex::kA_Index] = kUnknown_SkColorType;
-    sizeInfo->fSizes[SkYUVAIndex::kA_Index].fHeight =
-        sizeInfo->fSizes[SkYUVAIndex::kA_Index].fWidth =
-        sizeInfo->fWidthBytes[SkYUVAIndex::kA_Index] = 0;
-
     if (colorSpace) {
         *colorSpace = kJPEG_SkYUVColorSpace;
     }
@@ -850,22 +843,18 @@
     return true;
 }
 
-SkCodec::Result SkJpegCodec::onGetYUV8Planes(const SkYUVSizeInfo& sizeInfo,
-                                             void* planes[SkYUVSizeInfo::kMaxCount]) {
+SkCodec::Result SkJpegCodec::onGetYUV8Planes(const SkYUVSizeInfo& sizeInfo, void* planes[3]) {
     SkYUVSizeInfo defaultInfo;
 
     // This will check is_yuv_supported(), so we don't need to here.
     bool supportsYUV = this->onQueryYUV8(&defaultInfo, nullptr);
     if (!supportsYUV ||
-            kAlpha_8_SkColorType != sizeInfo.fColorTypes[0] ||
-            kAlpha_8_SkColorType != sizeInfo.fColorTypes[1] ||
-            kAlpha_8_SkColorType != sizeInfo.fColorTypes[2] ||
-            sizeInfo.fSizes[0] != defaultInfo.fSizes[0] ||
-            sizeInfo.fSizes[1] != defaultInfo.fSizes[1] ||
-            sizeInfo.fSizes[2] != defaultInfo.fSizes[2] ||
-            sizeInfo.fWidthBytes[0] < defaultInfo.fWidthBytes[0] ||
-            sizeInfo.fWidthBytes[1] < defaultInfo.fWidthBytes[1] ||
-            sizeInfo.fWidthBytes[2] < defaultInfo.fWidthBytes[2]) {
+            sizeInfo.fSizes[SkYUVSizeInfo::kY] != defaultInfo.fSizes[SkYUVSizeInfo::kY] ||
+            sizeInfo.fSizes[SkYUVSizeInfo::kU] != defaultInfo.fSizes[SkYUVSizeInfo::kU] ||
+            sizeInfo.fSizes[SkYUVSizeInfo::kV] != defaultInfo.fSizes[SkYUVSizeInfo::kV] ||
+            sizeInfo.fWidthBytes[SkYUVSizeInfo::kY] < defaultInfo.fWidthBytes[SkYUVSizeInfo::kY] ||
+            sizeInfo.fWidthBytes[SkYUVSizeInfo::kU] < defaultInfo.fWidthBytes[SkYUVSizeInfo::kU] ||
+            sizeInfo.fWidthBytes[SkYUVSizeInfo::kV] < defaultInfo.fWidthBytes[SkYUVSizeInfo::kV]) {
         return fDecoderMgr->returnFailure("onGetYUV8Planes", kInvalidInput);
     }
 
@@ -890,9 +879,9 @@
 
     // Currently, we require that the Y plane dimensions match the image dimensions
     // and that the U and V planes are the same dimensions.
-    SkASSERT(sizeInfo.fSizes[1] == sizeInfo.fSizes[2]);
-    SkASSERT((uint32_t) sizeInfo.fSizes[0].width() == dinfo->output_width &&
-             (uint32_t) sizeInfo.fSizes[0].height() == dinfo->output_height);
+    SkASSERT(sizeInfo.fSizes[SkYUVSizeInfo::kU] == sizeInfo.fSizes[SkYUVSizeInfo::kV]);
+    SkASSERT((uint32_t) sizeInfo.fSizes[SkYUVSizeInfo::kY].width() == dinfo->output_width &&
+            (uint32_t) sizeInfo.fSizes[SkYUVSizeInfo::kY].height() == dinfo->output_height);
 
     // Build a JSAMPIMAGE to handle output from libjpeg-turbo.  A JSAMPIMAGE has
     // a 2-D array of pixels for each of the components (Y, U, V) in the image.
@@ -909,19 +898,20 @@
     // Initialize rowptrs.
     int numYRowsPerBlock = DCTSIZE * dinfo->comp_info[0].v_samp_factor;
     for (int i = 0; i < numYRowsPerBlock; i++) {
-        rowptrs[i] = SkTAddOffset<JSAMPLE>(planes[0], i * sizeInfo.fWidthBytes[0]);
+        rowptrs[i] = SkTAddOffset<JSAMPLE>(planes[SkYUVSizeInfo::kY],
+                i * sizeInfo.fWidthBytes[SkYUVSizeInfo::kY]);
     }
     for (int i = 0; i < DCTSIZE; i++) {
-        rowptrs[i + 2 * DCTSIZE] =
-            SkTAddOffset<JSAMPLE>(planes[1], i * sizeInfo.fWidthBytes[1]);
-        rowptrs[i + 3 * DCTSIZE] =
-            SkTAddOffset<JSAMPLE>(planes[2], i * sizeInfo.fWidthBytes[2]);
+        rowptrs[i + 2 * DCTSIZE] = SkTAddOffset<JSAMPLE>(planes[SkYUVSizeInfo::kU],
+                i * sizeInfo.fWidthBytes[SkYUVSizeInfo::kU]);
+        rowptrs[i + 3 * DCTSIZE] = SkTAddOffset<JSAMPLE>(planes[SkYUVSizeInfo::kV],
+                i * sizeInfo.fWidthBytes[SkYUVSizeInfo::kV]);
     }
 
     // After each loop iteration, we will increment pointers to Y, U, and V.
-    size_t blockIncrementY = numYRowsPerBlock * sizeInfo.fWidthBytes[0];
-    size_t blockIncrementU = DCTSIZE * sizeInfo.fWidthBytes[1];
-    size_t blockIncrementV = DCTSIZE * sizeInfo.fWidthBytes[2];
+    size_t blockIncrementY = numYRowsPerBlock * sizeInfo.fWidthBytes[SkYUVSizeInfo::kY];
+    size_t blockIncrementU = DCTSIZE * sizeInfo.fWidthBytes[SkYUVSizeInfo::kU];
+    size_t blockIncrementV = DCTSIZE * sizeInfo.fWidthBytes[SkYUVSizeInfo::kV];
 
     uint32_t numRowsPerBlock = numYRowsPerBlock;
 
@@ -954,7 +944,7 @@
         // this requirement using a dummy row buffer.
         // FIXME: Should SkCodec have an extra memory buffer that can be shared among
         //        all of the implementations that use temporary/garbage memory?
-        SkAutoTMalloc<JSAMPLE> dummyRow(sizeInfo.fWidthBytes[SkYUVAIndex::kY_Index]);
+        SkAutoTMalloc<JSAMPLE> dummyRow(sizeInfo.fWidthBytes[SkYUVSizeInfo::kY]);
         for (int i = remainingRows; i < numYRowsPerBlock; i++) {
             rowptrs[i] = dummyRow.get();
         }
diff --git a/src/codec/SkJpegCodec.h b/src/codec/SkJpegCodec.h
index c102627..5eff1d5 100644
--- a/src/codec/SkJpegCodec.h
+++ b/src/codec/SkJpegCodec.h
@@ -46,8 +46,7 @@
 
     bool onQueryYUV8(SkYUVSizeInfo* sizeInfo, SkYUVColorSpace* colorSpace) const override;
 
-    Result onGetYUV8Planes(const SkYUVSizeInfo& sizeInfo,
-                           void* planes[SkYUVSizeInfo::kMaxCount]) override;
+    Result onGetYUV8Planes(const SkYUVSizeInfo& sizeInfo, void* planes[3]) override;
 
     SkEncodedImageFormat onGetEncodedFormat() const override {
         return SkEncodedImageFormat::kJPEG;
diff --git a/src/core/SkImageGenerator.cpp b/src/core/SkImageGenerator.cpp
index 42d5214..e0275a1 100644
--- a/src/core/SkImageGenerator.cpp
+++ b/src/core/SkImageGenerator.cpp
@@ -8,7 +8,6 @@
 #include "SkImage.h"
 #include "SkImageGenerator.h"
 #include "SkNextID.h"
-#include "SkYUVAIndex.h"
 
 SkImageGenerator::SkImageGenerator(const SkImageInfo& info, uint32_t uniqueID)
     : fInfo(info)
@@ -30,119 +29,28 @@
     return this->onGetPixels(info, pixels, rowBytes, defaultOpts);
 }
 
-bool SkImageGenerator::queryYUVA8(SkYUVSizeInfo* sizeInfo,
-                                  SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
-                                  SkYUVColorSpace* colorSpace) const {
+bool SkImageGenerator::queryYUV8(SkYUVSizeInfo* sizeInfo, SkYUVColorSpace* colorSpace) const {
     SkASSERT(sizeInfo);
 
-    if (!this->onQueryYUVA8(sizeInfo, yuvaIndices, colorSpace)) {
-        // try the deprecated method and make a guess at the other data
-        if (this->onQueryYUV8(sizeInfo, colorSpace)) {
-            // take a guess at the number of planes
-            int numPlanes = SkYUVSizeInfo::kMaxCount;
-            for (int i = 0; i < SkYUVSizeInfo::kMaxCount; ++i) {
-                if (sizeInfo->fSizes[i].isEmpty()) {
-                    numPlanes = i;
-                    break;
-                }
-            }
-            if (!numPlanes) {
-                return false;
-            }
-            switch (numPlanes) {
-                case 1:
-                    // Assume 3 interleaved planes
-                    sizeInfo->fColorTypes[0] = kRGBA_8888_SkColorType;
-                    sizeInfo->fColorTypes[1] = kUnknown_SkColorType;
-                    sizeInfo->fColorTypes[2] = kUnknown_SkColorType;
-                    sizeInfo->fColorTypes[3] = kUnknown_SkColorType;
-                    yuvaIndices[SkYUVAIndex::kY_Index].fIndex = 0;
-                    yuvaIndices[SkYUVAIndex::kY_Index].fChannel = SkColorChannel::kR;
-                    yuvaIndices[SkYUVAIndex::kU_Index].fIndex = 0;
-                    yuvaIndices[SkYUVAIndex::kU_Index].fChannel = SkColorChannel::kG;
-                    yuvaIndices[SkYUVAIndex::kV_Index].fIndex = 0;
-                    yuvaIndices[SkYUVAIndex::kV_Index].fChannel = SkColorChannel::kB;
-                    yuvaIndices[SkYUVAIndex::kA_Index].fIndex = -1;
-                    yuvaIndices[SkYUVAIndex::kA_Index].fChannel = SkColorChannel::kR;
-                    break;
-                case 2:
-                    // Assume 1 Y plane and interleaved UV planes
-                    sizeInfo->fColorTypes[0] = kAlpha_8_SkColorType;
-                    sizeInfo->fColorTypes[1] = kRGBA_8888_SkColorType;
-                    sizeInfo->fColorTypes[2] = kUnknown_SkColorType;
-                    sizeInfo->fColorTypes[3] = kUnknown_SkColorType;
-                    yuvaIndices[SkYUVAIndex::kY_Index].fIndex = 0;
-                    yuvaIndices[SkYUVAIndex::kY_Index].fChannel = SkColorChannel::kR;
-                    yuvaIndices[SkYUVAIndex::kU_Index].fIndex = 1;
-                    yuvaIndices[SkYUVAIndex::kU_Index].fChannel = SkColorChannel::kR;
-                    yuvaIndices[SkYUVAIndex::kV_Index].fIndex = 1;
-                    yuvaIndices[SkYUVAIndex::kV_Index].fChannel = SkColorChannel::kG;
-                    yuvaIndices[SkYUVAIndex::kA_Index].fIndex = -1;
-                    yuvaIndices[SkYUVAIndex::kA_Index].fChannel = SkColorChannel::kR;
-                    break;
-                case 3:
-                    // Assume 3 separate non-interleaved planes
-                    sizeInfo->fColorTypes[0] = kAlpha_8_SkColorType;
-                    sizeInfo->fColorTypes[1] = kAlpha_8_SkColorType;
-                    sizeInfo->fColorTypes[2] = kAlpha_8_SkColorType;
-                    sizeInfo->fColorTypes[3] = kUnknown_SkColorType;
-                    yuvaIndices[SkYUVAIndex::kY_Index].fIndex = 0;
-                    yuvaIndices[SkYUVAIndex::kY_Index].fChannel = SkColorChannel::kR;
-                    yuvaIndices[SkYUVAIndex::kU_Index].fIndex = 1;
-                    yuvaIndices[SkYUVAIndex::kU_Index].fChannel = SkColorChannel::kR;
-                    yuvaIndices[SkYUVAIndex::kV_Index].fIndex = 2;
-                    yuvaIndices[SkYUVAIndex::kV_Index].fChannel = SkColorChannel::kR;
-                    yuvaIndices[SkYUVAIndex::kA_Index].fIndex = -1;
-                    yuvaIndices[SkYUVAIndex::kA_Index].fChannel = SkColorChannel::kR;
-                    break;
-                case 4:
-                default:
-                    // Assume 4 separate non-interleaved planes
-                    sizeInfo->fColorTypes[0] = kAlpha_8_SkColorType;
-                    sizeInfo->fColorTypes[1] = kAlpha_8_SkColorType;
-                    sizeInfo->fColorTypes[2] = kAlpha_8_SkColorType;
-                    sizeInfo->fColorTypes[3] = kAlpha_8_SkColorType;
-                    yuvaIndices[SkYUVAIndex::kY_Index].fIndex = 0;
-                    yuvaIndices[SkYUVAIndex::kY_Index].fChannel = SkColorChannel::kR;
-                    yuvaIndices[SkYUVAIndex::kU_Index].fIndex = 1;
-                    yuvaIndices[SkYUVAIndex::kU_Index].fChannel = SkColorChannel::kR;
-                    yuvaIndices[SkYUVAIndex::kV_Index].fIndex = 2;
-                    yuvaIndices[SkYUVAIndex::kV_Index].fChannel = SkColorChannel::kR;
-                    yuvaIndices[SkYUVAIndex::kA_Index].fIndex = 3;
-                    yuvaIndices[SkYUVAIndex::kA_Index].fChannel = SkColorChannel::kR;
-                    break;
-            }
-
-            return true;
-        }
-
-        return false;
-    }
-
-    return true;
+    return this->onQueryYUV8(sizeInfo, colorSpace);
 }
 
-bool SkImageGenerator::getYUVA8Planes(const SkYUVSizeInfo& sizeInfo,
-                                      const SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
-                                      void* planes[SkYUVSizeInfo::kMaxCount]) {
+bool SkImageGenerator::getYUV8Planes(const SkYUVSizeInfo& sizeInfo, void* planes[3]) {
+    SkASSERT(sizeInfo.fSizes[SkYUVSizeInfo::kY].fWidth >= 0);
+    SkASSERT(sizeInfo.fSizes[SkYUVSizeInfo::kY].fHeight >= 0);
+    SkASSERT(sizeInfo.fSizes[SkYUVSizeInfo::kU].fWidth >= 0);
+    SkASSERT(sizeInfo.fSizes[SkYUVSizeInfo::kU].fHeight >= 0);
+    SkASSERT(sizeInfo.fSizes[SkYUVSizeInfo::kV].fWidth >= 0);
+    SkASSERT(sizeInfo.fSizes[SkYUVSizeInfo::kV].fHeight >= 0);
+    SkASSERT(sizeInfo.fWidthBytes[SkYUVSizeInfo::kY] >=
+            (size_t) sizeInfo.fSizes[SkYUVSizeInfo::kY].fWidth);
+    SkASSERT(sizeInfo.fWidthBytes[SkYUVSizeInfo::kU] >=
+            (size_t) sizeInfo.fSizes[SkYUVSizeInfo::kU].fWidth);
+    SkASSERT(sizeInfo.fWidthBytes[SkYUVSizeInfo::kV] >=
+            (size_t) sizeInfo.fSizes[SkYUVSizeInfo::kV].fWidth);
+    SkASSERT(planes && planes[0] && planes[1] && planes[2]);
 
-    for (int i = 0; i < SkYUVSizeInfo::kMaxCount; ++i) {
-        SkASSERT(sizeInfo.fSizes[i].fWidth >= 0);
-        SkASSERT(sizeInfo.fSizes[i].fHeight >= 0);
-        SkASSERT(sizeInfo.fWidthBytes[i] >= (size_t) sizeInfo.fSizes[i].fWidth);
-    }
-
-    int numPlanes = 0;
-    SkASSERT(SkYUVAIndex::AreValidIndices(yuvaIndices, &numPlanes));
-    SkASSERT(planes);
-    for (int i = 0; i < numPlanes; ++i) {
-        SkASSERT(planes[i]);
-    }
-
-    if (!this->onGetYUVA8Planes(sizeInfo, yuvaIndices, planes)) {
-        return this->onGetYUV8Planes(sizeInfo, planes);
-    }
-    return true;
+    return this->onGetYUV8Planes(sizeInfo, planes);
 }
 
 #if SK_SUPPORT_GPU
diff --git a/src/core/SkYUVPlanesCache.h b/src/core/SkYUVPlanesCache.h
index 648f194..1c866a2 100644
--- a/src/core/SkYUVPlanesCache.h
+++ b/src/core/SkYUVPlanesCache.h
@@ -10,7 +10,6 @@
 
 #include "SkCachedData.h"
 #include "SkImageInfo.h"
-#include "SkYUVAIndex.h"
 #include "SkYUVSizeInfo.h"
 
 class SkResourceCache;
@@ -18,15 +17,14 @@
 class SkYUVPlanesCache {
 public:
     /**
-     * The Info struct contains data about the 4 Y, U, V, and A planes of memory stored
+     * The Info struct contains data about the 3 Y, U and V planes of memory stored
      * contiguously, in that order, as a single block of memory within SkYUVPlanesCache.
      *
-     * fSizeInfo: fWidth, fHeight, and fWidthBytes of each of the Y, U, V, and A planes.
+     * fSizeInfo: fWidth, fHeight, and fWidthBytes of each of the Y, U, and V planes.
      * fColorSpace: color space that will be used for the YUV -> RGB conversion.
      */
     struct Info {
         SkYUVSizeInfo   fSizeInfo;
-        SkYUVAIndex     fYUVAIndices[SkYUVAIndex::kIndexCount];
         SkYUVColorSpace fColorSpace;
     };
     /**
diff --git a/src/core/SkYUVSizeInfo.cpp b/src/core/SkYUVSizeInfo.cpp
deleted file mode 100644
index 7ebdbb9..0000000
--- a/src/core/SkYUVSizeInfo.cpp
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
- * Copyright 2018 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkYUVSizeInfo.h"
-#include "SkTemplates.h"
-
-void SkYUVSizeInfo::computePlanes(void* base, void* planes[SkYUVSizeInfo::kMaxCount]) const {
-    planes[0] = base;
-    int i = 1;
-    for (; i < SkYUVSizeInfo::kMaxCount; ++i) {
-        if (fSizes[i].isEmpty()) {
-            break;
-        }
-        planes[i] = SkTAddOffset<void>(planes[i - 1], fWidthBytes[i - 1] * fSizes[i - 1].height());
-    }
-    for (; i < SkYUVSizeInfo::kMaxCount; ++i) {
-        planes[i] = nullptr;
-    }
-}
diff --git a/src/gpu/GrYUVProvider.cpp b/src/gpu/GrYUVProvider.cpp
index beccd7d..da86eac 100644
--- a/src/gpu/GrYUVProvider.cpp
+++ b/src/gpu/GrYUVProvider.cpp
@@ -22,64 +22,40 @@
 #include "effects/GrYUVtoRGBEffect.h"
 
 sk_sp<SkCachedData> GrYUVProvider::getPlanes(SkYUVSizeInfo* size,
-                                             SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
                                              SkYUVColorSpace* colorSpace,
-                                             const void* constPlanes[SkYUVSizeInfo::kMaxCount]) {
+                                             const void* constPlanes[3]) {
     sk_sp<SkCachedData> data;
     SkYUVPlanesCache::Info yuvInfo;
     data.reset(SkYUVPlanesCache::FindAndRef(this->onGetID(), &yuvInfo));
 
-    void* planes[SkYUVSizeInfo::kMaxCount];
+    void* planes[3];
 
     if (data.get()) {
-        planes[0] = (void*)data->data(); // we should always have at least one plane
-
-        for (int i = 1; i < SkYUVSizeInfo::kMaxCount; ++i) {
-            if (!yuvInfo.fSizeInfo.fWidthBytes[i]) {
-                SkASSERT(kUnknown_SkColorType == yuvInfo.fSizeInfo.fColorTypes[i] &&
-                         !yuvInfo.fSizeInfo.fWidthBytes[i] &&
-                         !yuvInfo.fSizeInfo.fSizes[i].fHeight);
-                planes[i] = nullptr;
-                continue;
-            }
-
-            planes[i] = (uint8_t*)planes[i-1] + (yuvInfo.fSizeInfo.fWidthBytes[i-1] *
-                                                 yuvInfo.fSizeInfo.fSizes[i-1].fHeight);
-        }
+        planes[0] = (void*)data->data();
+        planes[1] = (uint8_t*)planes[0] + (yuvInfo.fSizeInfo.fWidthBytes[SkYUVSizeInfo::kY] *
+                                           yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fHeight);
+        planes[2] = (uint8_t*)planes[1] + (yuvInfo.fSizeInfo.fWidthBytes[SkYUVSizeInfo::kU] *
+                                           yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kU].fHeight);
     } else {
         // Fetch yuv plane sizes for memory allocation.
-        if (!this->onQueryYUVA8(&yuvInfo.fSizeInfo, yuvInfo.fYUVAIndices, &yuvInfo.fColorSpace)) {
+        if (!this->onQueryYUV8(&yuvInfo.fSizeInfo, &yuvInfo.fColorSpace)) {
             return nullptr;
         }
 
-        // Allocate the memory for YUVA
+        // Allocate the memory for YUV
         size_t totalSize(0);
-        for (int i = 0; i < SkYUVSizeInfo::kMaxCount; i++) {
-            SkASSERT(kUnknown_SkColorType != yuvInfo.fSizeInfo.fColorTypes[i] ||
-                     (!yuvInfo.fSizeInfo.fWidthBytes[i] && !yuvInfo.fSizeInfo.fSizes[i].fHeight));
-
+        for (int i = 0; i < 3; i++) {
             totalSize += yuvInfo.fSizeInfo.fWidthBytes[i] * yuvInfo.fSizeInfo.fSizes[i].fHeight;
         }
-
         data.reset(SkResourceCache::NewCachedData(totalSize));
-
         planes[0] = data->writable_data();
-
-        for (int i = 1; i < SkYUVSizeInfo::kMaxCount; ++i) {
-            if (!yuvInfo.fSizeInfo.fWidthBytes[i]) {
-                SkASSERT(kUnknown_SkColorType == yuvInfo.fSizeInfo.fColorTypes[i] &&
-                         !yuvInfo.fSizeInfo.fWidthBytes[i] &&
-                         !yuvInfo.fSizeInfo.fSizes[i].fHeight);
-                planes[i] = nullptr;
-                continue;
-            }
-
-            planes[i] = (uint8_t*)planes[i-1] + (yuvInfo.fSizeInfo.fWidthBytes[i-1] *
-                                                 yuvInfo.fSizeInfo.fSizes[i-1].fHeight);
-        }
+        planes[1] = (uint8_t*)planes[0] + (yuvInfo.fSizeInfo.fWidthBytes[SkYUVSizeInfo::kY] *
+                                           yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kY].fHeight);
+        planes[2] = (uint8_t*)planes[1] + (yuvInfo.fSizeInfo.fWidthBytes[SkYUVSizeInfo::kU] *
+                                           yuvInfo.fSizeInfo.fSizes[SkYUVSizeInfo::kU].fHeight);
 
         // Get the YUV planes.
-        if (!this->onGetYUVA8Planes(yuvInfo.fSizeInfo, yuvInfo.fYUVAIndices, planes)) {
+        if (!this->onGetYUV8Planes(yuvInfo.fSizeInfo, planes)) {
             return nullptr;
         }
 
@@ -88,12 +64,10 @@
     }
 
     *size = yuvInfo.fSizeInfo;
-    memcpy(yuvaIndices, yuvInfo.fYUVAIndices, sizeof(yuvInfo.fYUVAIndices));
     *colorSpace = yuvInfo.fColorSpace;
     constPlanes[0] = planes[0];
     constPlanes[1] = planes[1];
     constPlanes[2] = planes[2];
-    constPlanes[3] = planes[3];
     return data;
 }
 
@@ -107,33 +81,24 @@
                                                        SkColorSpace* srcColorSpace,
                                                        SkColorSpace* dstColorSpace) {
     SkYUVSizeInfo yuvSizeInfo;
-    SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount];
     SkYUVColorSpace yuvColorSpace;
-    const void* planes[SkYUVSizeInfo::kMaxCount];
+    const void* planes[3];
 
-    sk_sp<SkCachedData> dataStorage = this->getPlanes(&yuvSizeInfo, yuvaIndices,
-                                                      &yuvColorSpace, planes);
+    sk_sp<SkCachedData> dataStorage = this->getPlanes(&yuvSizeInfo, &yuvColorSpace, planes);
     if (!dataStorage) {
         return nullptr;
     }
 
-    sk_sp<GrTextureProxy> yuvTextureProxies[SkYUVSizeInfo::kMaxCount];
-    for (int i = 0; i < SkYUVSizeInfo::kMaxCount; ++i) {
-        if (kUnknown_SkColorType == yuvSizeInfo.fColorTypes[i]) {
-            SkASSERT(!yuvSizeInfo.fSizes[i].fWidth ||
-                     !yuvSizeInfo.fSizes[i].fHeight ||
-                     !yuvSizeInfo.fWidthBytes[i]);
-            continue;
-        }
-
+    sk_sp<GrTextureProxy> yuvTextureProxies[3];
+    for (int i = 0; i < 3; i++) {
         int componentWidth  = yuvSizeInfo.fSizes[i].fWidth;
         int componentHeight = yuvSizeInfo.fSizes[i].fHeight;
         // If the sizes of the components are not all the same we choose to create exact-match
         // textures for the smaller ones rather than add a texture domain to the draw.
         // TODO: revisit this decision to improve texture reuse?
         SkBackingFit fit =
-                (componentWidth  != yuvSizeInfo.fSizes[0].fWidth) ||
-                (componentHeight != yuvSizeInfo.fSizes[0].fHeight)
+                (componentWidth  != yuvSizeInfo.fSizes[SkYUVSizeInfo::kY].fWidth) ||
+                (componentHeight != yuvSizeInfo.fSizes[SkYUVSizeInfo::kY].fHeight)
                     ? SkBackingFit::kExact : SkBackingFit::kApprox;
 
         SkImageInfo imageInfo = SkImageInfo::MakeA8(componentWidth, componentHeight);
@@ -166,8 +131,17 @@
         return nullptr;
     }
 
+    // This code path only generates I420 (i.e., 3 separate plane) YUVs
+    SkYUVAIndex yuvaIndices[4] = {
+        {  0, SkColorChannel::kA },
+        {  1, SkColorChannel::kA },
+        {  2, SkColorChannel::kA },
+        { -1, SkColorChannel::kA }, // no alpha
+    };
+
     GrPaint paint;
-    auto yuvToRgbProcessor = GrYUVtoRGBEffect::Make(yuvTextureProxies, yuvaIndices, yuvColorSpace);
+    auto yuvToRgbProcessor =
+            GrYUVtoRGBEffect::Make(yuvTextureProxies, yuvaIndices, yuvColorSpace);
     paint.addColorFragmentProcessor(std::move(yuvToRgbProcessor));
 
     // If the caller expects the pixels in a different color space than the one from the image,
@@ -180,8 +154,8 @@
     }
 
     paint.setPorterDuffXPFactory(SkBlendMode::kSrc);
-    const SkRect r = SkRect::MakeIWH(yuvSizeInfo.fSizes[0].fWidth,
-                                     yuvSizeInfo.fSizes[0].fHeight);
+    const SkRect r = SkRect::MakeIWH(yuvSizeInfo.fSizes[SkYUVSizeInfo::kY].fWidth,
+                                     yuvSizeInfo.fSizes[SkYUVSizeInfo::kY].fHeight);
 
     renderTargetContext->drawRect(GrNoClip(), std::move(paint), GrAA::kNo, SkMatrix::I(), r);
 
diff --git a/src/gpu/GrYUVProvider.h b/src/gpu/GrYUVProvider.h
index 505274e..de6ce33 100644
--- a/src/gpu/GrYUVProvider.h
+++ b/src/gpu/GrYUVProvider.h
@@ -17,7 +17,6 @@
 class GrTexture;
 class GrTextureProxy;
 class SkCachedData;
-struct SkYUVAIndex;
 
 /**
  *  There are at least 2 different ways to extract/retrieve YUV planar data...
@@ -44,8 +43,7 @@
                                             SkColorSpace* srcColorSpace,
                                             SkColorSpace* dstColorSpace);
 
-    sk_sp<SkCachedData> getPlanes(SkYUVSizeInfo*, SkYUVAIndex[SkYUVAIndex::kIndexCount],
-                                  SkYUVColorSpace*, const void* planes[SkYUVSizeInfo::kMaxCount]);
+    sk_sp<SkCachedData> getPlanes(SkYUVSizeInfo*, SkYUVColorSpace*, const void* planes[3]);
 
 private:
     virtual uint32_t onGetID() const = 0;
@@ -56,29 +54,23 @@
      *  If decoding to YUV is supported, this returns true.  Otherwise, this
      *  returns false and does not modify any of the parameters.
      *
-     *  @param sizeInfo    Output parameter indicating the sizes and required
-     *                     allocation widths of the Y, U, V, and A planes.
-     *  @param yuvaIndices How the YUVA planes are used/organized
-     *  @param colorSpace  Output parameter.
+     *  @param sizeInfo   Output parameter indicating the sizes and required
+     *                    allocation widths of the Y, U, and V planes.
+     *  @param colorSpace Output parameter.
      */
-    virtual bool onQueryYUVA8(SkYUVSizeInfo* sizeInfo,
-                              SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
-                              SkYUVColorSpace* colorSpace) const = 0;
+    virtual bool onQueryYUV8(SkYUVSizeInfo* sizeInfo, SkYUVColorSpace* colorSpace) const = 0;
 
     /**
      *  Returns true on success and false on failure.
      *  This always attempts to perform a full decode.  If the client only
-     *  wants size, it should call onQueryYUVA8().
+     *  wants size, it should call onQueryYUV8().
      *
-     *  @param sizeInfo    Needs to exactly match the values returned by the
-     *                     query, except the WidthBytes may be larger than the
-     *                     recommendation (but not smaller).
-     *  @param yuvaIndices How the YUVA planes are used/organized
-     *  @param planes      Memory for each of the Y, U, V, and A planes.
+     *  @param sizeInfo   Needs to exactly match the values returned by the
+     *                    query, except the WidthBytes may be larger than the
+     *                    recommendation (but not smaller).
+     *  @param planes     Memory for each of the Y, U, and V planes.
      */
-    virtual bool onGetYUVA8Planes(const SkYUVSizeInfo& sizeInfo,
-                                  const SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
-                                  void* planes[]) = 0;
+    virtual bool onGetYUV8Planes(const SkYUVSizeInfo& sizeInfo, void* planes[3]) = 0;
 
     // This is used as release callback for the YUV data that we capture in an SkImage when
     // uploading to a gpu. When the upload is complete and we release the SkImage this callback will
diff --git a/src/image/SkImage.cpp b/src/image/SkImage.cpp
index dcdd103..75cf127 100644
--- a/src/image/SkImage.cpp
+++ b/src/image/SkImage.cpp
@@ -227,8 +227,7 @@
     return as_IB(this)->onAsLegacyBitmap(bitmap);
 }
 
-sk_sp<SkCachedData> SkImage_Base::getPlanes(SkYUVSizeInfo*, SkYUVAIndex[4],
-                                            SkYUVColorSpace*, const void*[4]) {
+sk_sp<SkCachedData> SkImage_Base::getPlanes(SkYUVSizeInfo*, SkYUVColorSpace*,const void*[3]) {
     return nullptr;
 }
 
diff --git a/src/image/SkImage_Base.h b/src/image/SkImage_Base.h
index 7bbd81d..8765f89 100644
--- a/src/image/SkImage_Base.h
+++ b/src/image/SkImage_Base.h
@@ -72,8 +72,7 @@
 
     virtual sk_sp<SkImage> onMakeSubset(const SkIRect&) const = 0;
 
-    virtual sk_sp<SkCachedData> getPlanes(SkYUVSizeInfo*, SkYUVAIndex[4],
-                                          SkYUVColorSpace*, const void* planes[4]);
+    virtual sk_sp<SkCachedData> getPlanes(SkYUVSizeInfo*, SkYUVColorSpace*, const void* planes[3]);
     virtual sk_sp<SkData> onRefEncoded() const { return nullptr; }
 
     virtual bool onAsLegacyBitmap(SkBitmap*) const;
diff --git a/src/image/SkImage_GpuYUVA.cpp b/src/image/SkImage_GpuYUVA.cpp
index 2fd4406..25b9349 100644
--- a/src/image/SkImage_GpuYUVA.cpp
+++ b/src/image/SkImage_GpuYUVA.cpp
@@ -233,7 +233,6 @@
     }
 
     // Set up color types
-    // TODO: pass in the correct color type rather than deducing it?
     SkColorType texColorTypes[4] = { kUnknown_SkColorType, kUnknown_SkColorType,
                                      kUnknown_SkColorType, kUnknown_SkColorType };
     for (int yuvIndex = 0; yuvIndex < 4; ++yuvIndex) {
@@ -248,6 +247,10 @@
             texColorTypes[texIdx] = kRGBA_8888_SkColorType;
         }
     }
+    // If UV is interleaved, then Y will have RGBA color type
+    if (kRGBA_8888_SkColorType == texColorTypes[yuvaIndices[SkYUVAIndex::kU_Index].fIndex]) {
+        texColorTypes[yuvaIndices[SkYUVAIndex::kY_Index].fIndex] = kRGBA_8888_SkColorType;
+    }
 
     // Get lazy proxies
     GrProxyProvider* proxyProvider = context->contextPriv().proxyProvider();
@@ -258,17 +261,9 @@
             GrPixelConfig fConfig;
             SkPromiseImageHelper fPromiseHelper;
         } params;
-        bool res = context->contextPriv().caps()->getConfigFromBackendFormat(yuvaFormats[texIdx],
-                                                                             texColorTypes[texIdx],
-                                                                             &params.fConfig);
-        // Even though the data is single channel, we might be handed a multi-channel texture.
-        // To cover this case, we'll re-try with the RGBA colortype on failure.
-        if (!res && kAlpha_8_SkColorType == texColorTypes[texIdx]) {
-            res = context->contextPriv().caps()->getConfigFromBackendFormat(yuvaFormats[texIdx],
-                                                                            kRGBA_8888_SkColorType,
-                                                                            &params.fConfig);
-        }
-        if (!res) {
+        if (!context->contextPriv().caps()->getConfigFromBackendFormat(yuvaFormats[texIdx],
+                                                                       texColorTypes[texIdx],
+                                                                       &params.fConfig)) {
             return nullptr;
         }
         params.fPromiseHelper = promiseHelpers[texIdx];
diff --git a/src/image/SkImage_Lazy.cpp b/src/image/SkImage_Lazy.cpp
index 1688a81..7071b4b 100644
--- a/src/image/SkImage_Lazy.cpp
+++ b/src/image/SkImage_Lazy.cpp
@@ -355,15 +355,11 @@
 
 private:
     uint32_t onGetID() const override { return fGen->uniqueID(); }
-    bool onQueryYUVA8(SkYUVSizeInfo* sizeInfo,
-                      SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
-                      SkYUVColorSpace* colorSpace) const override {
-        return fGen->queryYUVA8(sizeInfo, yuvaIndices, colorSpace);
+    bool onQueryYUV8(SkYUVSizeInfo* sizeInfo, SkYUVColorSpace* colorSpace) const override {
+        return fGen->queryYUV8(sizeInfo, colorSpace);
     }
-    bool onGetYUVA8Planes(const SkYUVSizeInfo& sizeInfo,
-                          const SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
-                          void* planes[]) override {
-        return fGen->getYUVA8Planes(sizeInfo, yuvaIndices, planes);
+    bool onGetYUV8Planes(const SkYUVSizeInfo& sizeInfo, void* planes[3]) override {
+        return fGen->getYUV8Planes(sizeInfo, planes);
     }
 
     SkImageGenerator* fGen;
@@ -388,14 +384,13 @@
     }
 }
 
-sk_sp<SkCachedData> SkImage_Lazy::getPlanes(SkYUVSizeInfo* yuvaSizeInfo,
-                                            SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
+sk_sp<SkCachedData> SkImage_Lazy::getPlanes(SkYUVSizeInfo* yuvSizeInfo,
                                             SkYUVColorSpace* yuvColorSpace,
-                                            const void* planes[SkYUVSizeInfo::kMaxCount]) {
+                                            const void* planes[3]) {
     ScopedGenerator generator(fSharedGenerator);
     Generator_GrYUVProvider provider(generator);
 
-    sk_sp<SkCachedData> data = provider.getPlanes(yuvaSizeInfo, yuvaIndices, yuvColorSpace, planes);
+    sk_sp<SkCachedData> data = provider.getPlanes(yuvSizeInfo, yuvColorSpace, planes);
     if (!data) {
         return nullptr;
     }
diff --git a/src/image/SkImage_Lazy.h b/src/image/SkImage_Lazy.h
index 5c30ee3..a2b434a 100644
--- a/src/image/SkImage_Lazy.h
+++ b/src/image/SkImage_Lazy.h
@@ -49,8 +49,7 @@
                                             const GrSamplerState&, SkColorSpace*,
                                             sk_sp<SkColorSpace>*,
                                             SkScalar scaleAdjust[2]) const override;
-    sk_sp<SkCachedData> getPlanes(SkYUVSizeInfo*, SkYUVAIndex[4],
-                                  SkYUVColorSpace*, const void* planes[4]) override;
+    sk_sp<SkCachedData> getPlanes(SkYUVSizeInfo*, SkYUVColorSpace*, const void* planes[3]) override;
 #endif
     sk_sp<SkData> onRefEncoded() const override;
     sk_sp<SkImage> onMakeSubset(const SkIRect&) const override;
diff --git a/tests/ImageGeneratorTest.cpp b/tests/ImageGeneratorTest.cpp
index 907efc0..5c8864e 100644
--- a/tests/ImageGeneratorTest.cpp
+++ b/tests/ImageGeneratorTest.cpp
@@ -7,11 +7,9 @@
 
 #include "SkData.h"
 #include "SkCanvas.h"
-
 #include "SkGraphics.h"
 #include "SkImageGenerator.h"
 #include "SkImageInfoPriv.h"
-#include "SkYUVAIndex.h"
 #include "Test.h"
 
 #if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)
@@ -63,32 +61,24 @@
 DEF_TEST(ImageGenerator, reporter) {
     MyImageGenerator ig;
     SkYUVSizeInfo sizeInfo;
-    sizeInfo.fSizes[0] = SkISize::Make(200, 200);
-    sizeInfo.fSizes[1] = SkISize::Make(100, 100);
-    sizeInfo.fSizes[2] = SkISize::Make( 50,  50);
-    sizeInfo.fSizes[3] = SkISize::Make( 25,  25);
-    sizeInfo.fWidthBytes[0] = 0;
-    sizeInfo.fWidthBytes[1] = 0;
-    sizeInfo.fWidthBytes[2] = 0;
-    sizeInfo.fWidthBytes[3] = 0;
-    void* planes[4] = { nullptr };
-    SkYUVAIndex yuvaIndices[4];
+    sizeInfo.fSizes[SkYUVSizeInfo::kY] = SkISize::Make(200, 200);
+    sizeInfo.fSizes[SkYUVSizeInfo::kU] = SkISize::Make(100, 100);
+    sizeInfo.fSizes[SkYUVSizeInfo::kV] = SkISize::Make( 50,  50);
+    sizeInfo.fWidthBytes[SkYUVSizeInfo::kY] = 0;
+    sizeInfo.fWidthBytes[SkYUVSizeInfo::kU] = 0;
+    sizeInfo.fWidthBytes[SkYUVSizeInfo::kV] = 0;
+    void* planes[3] = { nullptr };
     SkYUVColorSpace colorSpace;
 
     // Check that the YUV decoding API does not cause any crashes
-    ig.queryYUVA8(&sizeInfo, yuvaIndices, nullptr);
-    ig.queryYUVA8(&sizeInfo, yuvaIndices, &colorSpace);
-    sizeInfo.fWidthBytes[0] = 250;
-    sizeInfo.fWidthBytes[1] = 250;
-    sizeInfo.fWidthBytes[2] = 250;
-    sizeInfo.fWidthBytes[3] = 250;
-    yuvaIndices[0] = { 0, SkColorChannel::kR };
-    yuvaIndices[1] = { 1, SkColorChannel::kR };
-    yuvaIndices[2] = { 2, SkColorChannel::kR };
-    yuvaIndices[3] = { 3, SkColorChannel::kR };
+    ig.queryYUV8(&sizeInfo, nullptr);
+    ig.queryYUV8(&sizeInfo, &colorSpace);
+    sizeInfo.fWidthBytes[SkYUVSizeInfo::kY] = 250;
+    sizeInfo.fWidthBytes[SkYUVSizeInfo::kU] = 250;
+    sizeInfo.fWidthBytes[SkYUVSizeInfo::kV] = 250;
     int dummy;
-    planes[0] = planes[1] = planes[2] = planes[3] = &dummy;
-    ig.getYUVA8Planes(sizeInfo, yuvaIndices, planes);
+    planes[SkYUVSizeInfo::kY] = planes[SkYUVSizeInfo::kU] = planes[SkYUVSizeInfo::kV] = &dummy;
+    ig.getYUV8Planes(sizeInfo, planes);
 
     // Suppressed due to https://code.google.com/p/skia/issues/detail?id=4339
     if (false) {
diff --git a/tests/YUVCacheTest.cpp b/tests/YUVCacheTest.cpp
index 0410fdb..b34cf06 100644
--- a/tests/YUVCacheTest.cpp
+++ b/tests/YUVCacheTest.cpp
@@ -32,16 +32,10 @@
     SkResourceCache cache(1024);
 
     SkYUVPlanesCache::Info yuvInfo;
-    for (int i = 0; i < SkYUVSizeInfo::kMaxCount; i++) {
-        yuvInfo.fSizeInfo.fColorTypes[i] = kAlpha_8_SkColorType;
-        yuvInfo.fSizeInfo.fSizes[i].fWidth = 20 * (i + 1);
-        yuvInfo.fSizeInfo.fSizes[i].fHeight = 10 * (i + 1);
-        yuvInfo.fSizeInfo.fWidthBytes[i] = 80 * (i + 1);
-    }
-
-    for (int i = 0; i < SkYUVAIndex::kIndexCount; ++i) {
-        yuvInfo.fYUVAIndices[i].fIndex = -1;
-        yuvInfo.fYUVAIndices[i].fChannel = SkColorChannel::kR;
+    for (int i = 0; i < 3; i++) {
+        yuvInfo.fSizeInfo.fSizes[i].fWidth = 20 * i;
+        yuvInfo.fSizeInfo.fSizes[i].fHeight = 10 * i;
+        yuvInfo.fSizeInfo.fWidthBytes[i] = 80 * i;
     }
     yuvInfo.fColorSpace = kRec601_SkYUVColorSpace;
 
@@ -65,12 +59,14 @@
 
     REPORTER_ASSERT(reporter, data);
     REPORTER_ASSERT(reporter, data->size() == size);
-    REPORTER_ASSERT(reporter, yuvInfo.fSizeInfo == yuvInfoRead.fSizeInfo);
-
-    for (int i = 0; i < SkYUVAIndex::kIndexCount; ++i) {
-        REPORTER_ASSERT(reporter, yuvInfo.fYUVAIndices[i] == yuvInfoRead.fYUVAIndices[i]);
+    for (int i = 0; i < 3; ++i) {
+        REPORTER_ASSERT(reporter, yuvInfo.fSizeInfo.fSizes[i].fWidth ==
+                yuvInfoRead.fSizeInfo.fSizes[i].fWidth);
+        REPORTER_ASSERT(reporter, yuvInfo.fSizeInfo.fSizes[i].fHeight ==
+                yuvInfoRead.fSizeInfo.fSizes[i].fHeight);
+        REPORTER_ASSERT(reporter, yuvInfo.fSizeInfo.fWidthBytes[i] ==
+                yuvInfoRead.fSizeInfo.fWidthBytes[i]);
     }
-
     REPORTER_ASSERT(reporter, yuvInfo.fColorSpace == yuvInfoRead.fColorSpace);
 
     check_data(reporter, data, 2, kInCache, kLocked);
diff --git a/tests/YUVTest.cpp b/tests/YUVTest.cpp
index 50e36fd..3862952 100644
--- a/tests/YUVTest.cpp
+++ b/tests/YUVTest.cpp
@@ -14,8 +14,8 @@
 #include "Test.h"
 
 static void codec_yuv(skiatest::Reporter* reporter,
-                      const char path[],
-                      SkISize expectedSizes[4]) {
+                  const char path[],
+                  SkISize expectedSizes[3]) {
     std::unique_ptr<SkStream> stream(GetResourceAsStream(path));
     if (!stream) {
         return;
@@ -28,59 +28,59 @@
 
     // Test queryYUV8()
     SkYUVSizeInfo info;
-
-    {
-        bool success = codec->queryYUV8(nullptr, nullptr);
-        REPORTER_ASSERT(reporter, !success);
-        success = codec->queryYUV8(&info, nullptr);
-        REPORTER_ASSERT(reporter, (expectedSizes == nullptr) == !success);
-        if (!success) {
-            return;
-        }
-
-        for (int i = 0; i < SkYUVSizeInfo::kMaxCount; ++i) {
-            REPORTER_ASSERT(reporter, info.fSizes[i] == expectedSizes[i]);
-            REPORTER_ASSERT(reporter,
-                            info.fWidthBytes[i] == (uint32_t) SkAlign8(info.fSizes[i].width()));
-        }
+    bool success = codec->queryYUV8(nullptr, nullptr);
+    REPORTER_ASSERT(reporter, !success);
+    success = codec->queryYUV8(&info, nullptr);
+    REPORTER_ASSERT(reporter, (expectedSizes == nullptr) == !success);
+    if (!success) {
+        return;
     }
-
-    {
-        SkYUVColorSpace colorSpace;
-        bool success = codec->queryYUV8(&info, &colorSpace);
-        REPORTER_ASSERT(reporter, (expectedSizes == nullptr) == !success);
-        if (!success) {
-            return;
-        }
-
-        for (int i = 0; i < SkYUVSizeInfo::kMaxCount; ++i) {
-            REPORTER_ASSERT(reporter, info.fSizes[i] == expectedSizes[i]);
-            REPORTER_ASSERT(reporter,
-                            info.fWidthBytes[i] == (uint32_t) SkAlign8(info.fSizes[i].width()));
-        }
-        REPORTER_ASSERT(reporter, kJPEG_SkYUVColorSpace == colorSpace);
-    }
+    REPORTER_ASSERT(reporter,
+            0 == memcmp((const void*) &info, (const void*) expectedSizes, 3 * sizeof(SkISize)));
+    REPORTER_ASSERT(reporter, info.fWidthBytes[SkYUVSizeInfo::kY] ==
+            (uint32_t) SkAlign8(info.fSizes[SkYUVSizeInfo::kY].width()));
+    REPORTER_ASSERT(reporter, info.fWidthBytes[SkYUVSizeInfo::kU] ==
+            (uint32_t) SkAlign8(info.fSizes[SkYUVSizeInfo::kU].width()));
+    REPORTER_ASSERT(reporter, info.fWidthBytes[SkYUVSizeInfo::kV] ==
+            (uint32_t) SkAlign8(info.fSizes[SkYUVSizeInfo::kV].width()));
+    SkYUVColorSpace colorSpace;
+    success = codec->queryYUV8(&info, &colorSpace);
+    REPORTER_ASSERT(reporter,
+            0 == memcmp((const void*) &info, (const void*) expectedSizes, 3 * sizeof(SkISize)));
+    REPORTER_ASSERT(reporter, info.fWidthBytes[SkYUVSizeInfo::kY] ==
+            (uint32_t) SkAlign8(info.fSizes[SkYUVSizeInfo::kY].width()));
+    REPORTER_ASSERT(reporter, info.fWidthBytes[SkYUVSizeInfo::kU] ==
+            (uint32_t) SkAlign8(info.fSizes[SkYUVSizeInfo::kU].width()));
+    REPORTER_ASSERT(reporter, info.fWidthBytes[SkYUVSizeInfo::kV] ==
+            (uint32_t) SkAlign8(info.fSizes[SkYUVSizeInfo::kV].width()));
+    REPORTER_ASSERT(reporter, kJPEG_SkYUVColorSpace == colorSpace);
 
     // Allocate the memory for the YUV decode
-    size_t totalBytes = info.computeTotalBytes();
-
+    size_t totalBytes =
+            info.fWidthBytes[SkYUVSizeInfo::kY] * info.fSizes[SkYUVSizeInfo::kY].height() +
+            info.fWidthBytes[SkYUVSizeInfo::kU] * info.fSizes[SkYUVSizeInfo::kU].height() +
+            info.fWidthBytes[SkYUVSizeInfo::kV] * info.fSizes[SkYUVSizeInfo::kV].height();
     SkAutoMalloc storage(totalBytes);
-    void* planes[SkYUVSizeInfo::kMaxCount];
-
-    info.computePlanes(storage.get(), planes);
+    void* planes[3];
+    planes[0] = storage.get();
+    planes[1] = SkTAddOffset<void>(planes[0],
+            info.fWidthBytes[SkYUVSizeInfo::kY] * info.fSizes[SkYUVSizeInfo::kY].height());
+    planes[2] = SkTAddOffset<void>(planes[1],
+            info.fWidthBytes[SkYUVSizeInfo::kU] * info.fSizes[SkYUVSizeInfo::kU].height());
 
     // Test getYUV8Planes()
-    REPORTER_ASSERT(reporter, SkCodec::kInvalidInput == codec->getYUV8Planes(info, nullptr));
-    REPORTER_ASSERT(reporter, SkCodec::kSuccess == codec->getYUV8Planes(info, planes));
+    REPORTER_ASSERT(reporter, SkCodec::kInvalidInput ==
+            codec->getYUV8Planes(info, nullptr));
+    REPORTER_ASSERT(reporter, SkCodec::kSuccess ==
+            codec->getYUV8Planes(info, planes));
 }
 
 DEF_TEST(Jpeg_YUV_Codec, r) {
-    SkISize sizes[4];
+    SkISize sizes[3];
 
     sizes[0].set(128, 128);
     sizes[1].set(64, 64);
     sizes[2].set(64, 64);
-    sizes[3].set(0, 0);
     codec_yuv(r, "images/color_wheel.jpg", sizes);
 
     // H2V2
diff --git a/tools/DDLPromiseImageHelper.cpp b/tools/DDLPromiseImageHelper.cpp
index 079348a..63369cc 100644
--- a/tools/DDLPromiseImageHelper.cpp
+++ b/tools/DDLPromiseImageHelper.cpp
@@ -60,9 +60,7 @@
 
         // DDL TODO: how can we tell if we need mipmapping!
         if (info.isYUV()) {
-            int numPixmaps;
-            SkAssertResult(SkYUVAIndex::AreValidIndices(info.yuvaIndices(), &numPixmaps));
-            for (int j = 0; j < numPixmaps; ++j) {
+            for (int j = 0; j < 3; ++j) {
                 const SkPixmap& yuvPixmap = info.yuvPixmap(j);
 
                 sk_sp<PromiseImageCallbackContext> callbackContext(
@@ -142,13 +140,11 @@
 
     sk_sp<SkImage> image;
     if (curImage.isYUV()) {
-        GrBackendFormat backendFormats[SkYUVSizeInfo::kMaxCount];
-        void* contexts[SkYUVSizeInfo::kMaxCount] = { nullptr, nullptr, nullptr, nullptr };
-        SkISize sizes[SkYUVSizeInfo::kMaxCount];
-        // TODO: store this value somewhere?
-        int textureCount;
-        SkAssertResult(SkYUVAIndex::AreValidIndices(curImage.yuvaIndices(), &textureCount));
-        for (int i = 0; i < textureCount; ++i) {
+        GrBackendFormat backendFormats[4];
+        void* contexts[4] = { nullptr, nullptr, nullptr, nullptr };
+        SkISize sizes[4];
+
+        for (int i = 0; i < 3; ++i) {
             const GrBackendTexture& backendTex = curImage.backendTexture(i);
             backendFormats[i] = caps->createFormatFromBackendTexture(backendTex);
 
@@ -156,10 +152,17 @@
             sizes[i].set(curImage.yuvPixmap(i).width(), curImage.yuvPixmap(i).height());
         }
 
+        SkYUVAIndex yuvaIndices[4] = {
+                SkYUVAIndex{0, SkColorChannel::kA},
+                SkYUVAIndex{1, SkColorChannel::kA},
+                SkYUVAIndex{2, SkColorChannel::kA},
+                SkYUVAIndex{-1, SkColorChannel::kA}  // TODO: enable this
+        };
+
         image = recorder->makeYUVAPromiseTexture(curImage.yuvColorSpace(),
                                                  backendFormats,
                                                  sizes,
-                                                 curImage.yuvaIndices(),
+                                                 yuvaIndices,
                                                  curImage.overallWidth(),
                                                  curImage.overallHeight(),
                                                  GrSurfaceOrigin::kTopLeft_GrSurfaceOrigin,
@@ -216,27 +219,17 @@
                                                              image->uniqueID(),
                                                              overallII);
 
-    SkYUVSizeInfo yuvaSizeInfo;
-    SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount];
+    SkYUVSizeInfo yuvSizeInfo;
     SkYUVColorSpace yuvColorSpace;
-    const void* planes[SkYUVSizeInfo::kMaxCount];
-    sk_sp<SkCachedData> yuvData = ib->getPlanes(&yuvaSizeInfo, yuvaIndices, &yuvColorSpace, planes);
+    const void* planes[3];
+    sk_sp<SkCachedData> yuvData = ib->getPlanes(&yuvSizeInfo, &yuvColorSpace, planes);
     if (yuvData) {
-        newImageInfo.setYUVData(std::move(yuvData), yuvaIndices, yuvColorSpace);
+        newImageInfo.setYUVData(std::move(yuvData), yuvColorSpace);
 
-        for (int i = 0; i < SkYUVSizeInfo::kMaxCount; ++i) {
-            if (kUnknown_SkColorType == yuvaSizeInfo.fColorTypes[i]) {
-                SkASSERT(!yuvaSizeInfo.fSizes[i].fWidth &&
-                         !yuvaSizeInfo.fSizes[i].fHeight &&
-                         !yuvaSizeInfo.fWidthBytes[i]);
-                continue;
-            }
-
-            SkImageInfo planeII = SkImageInfo::Make(yuvaSizeInfo.fSizes[i].fWidth,
-                                                    yuvaSizeInfo.fSizes[i].fHeight,
-                                                    yuvaSizeInfo.fColorTypes[i],
-                                                    kUnpremul_SkAlphaType);
-            newImageInfo.addYUVPlane(i, planeII, planes[i], yuvaSizeInfo.fWidthBytes[i]);
+        for (int i = 0; i < 3; ++i) {
+            SkImageInfo planeII = SkImageInfo::MakeA8(yuvSizeInfo.fSizes[i].fWidth,
+                                                      yuvSizeInfo.fSizes[i].fHeight);
+            newImageInfo.addYUVPlane(i, planeII, planes[i], yuvSizeInfo.fWidthBytes[i]);
         }
     } else {
         sk_sp<SkImage> rasterImage = image->makeRasterImage(); // force decoding of lazy images
diff --git a/tools/DDLPromiseImageHelper.h b/tools/DDLPromiseImageHelper.h
index 763fe05..4c6c163 100644
--- a/tools/DDLPromiseImageHelper.h
+++ b/tools/DDLPromiseImageHelper.h
@@ -13,14 +13,12 @@
 
 #include "GrBackendSurface.h"
 #include "SkCachedData.h"
-#include "SkYUVAIndex.h"
 #include "SkYUVSizeInfo.h"
 
 class GrContext;
 class SkDeferredDisplayListRecorder;
 class SkImage;
 class SkPicture;
-struct SkYUVAIndex;
 
 // This class consolidates tracking & extraction of the original image data from an skp,
 // the upload of said data to the GPU and the fulfillment of promise images.
@@ -118,13 +116,9 @@
             SkASSERT(this->isYUV());
             return fYUVColorSpace;
         }
-        const SkYUVAIndex* yuvaIndices() const {
-            SkASSERT(this->isYUV());
-            return fYUVAIndices;
-        }
         const SkPixmap& yuvPixmap(int index) const {
             SkASSERT(this->isYUV());
-            SkASSERT(index >= 0 && index < SkYUVSizeInfo::kMaxCount);
+            SkASSERT(index >= 0 && index < 3);
             return fYUVPlanes[index];
         }
         const SkBitmap& normalBitmap() const {
@@ -133,37 +127,34 @@
         }
 
         void setCallbackContext(int index, sk_sp<PromiseImageCallbackContext> callbackContext) {
-            SkASSERT(index >= 0 && index < (this->isYUV() ? SkYUVSizeInfo::kMaxCount : 1));
+            SkASSERT(index >= 0 && index < (this->isYUV() ? 3 : 1));
             fCallbackContexts[index] = callbackContext;
         }
         PromiseImageCallbackContext* callbackContext(int index) {
-            SkASSERT(index >= 0 && index < (this->isYUV() ? SkYUVSizeInfo::kMaxCount : 1));
+            SkASSERT(index >= 0 && index < (this->isYUV() ? 3 : 1));
             return fCallbackContexts[index].get();
         }
         sk_sp<PromiseImageCallbackContext> refCallbackContext(int index) const {
-            SkASSERT(index >= 0 && index < (this->isYUV() ? SkYUVSizeInfo::kMaxCount : 1));
+            SkASSERT(index >= 0 && index < (this->isYUV() ? 3 : 1));
             return fCallbackContexts[index];
         }
 
         const GrCaps* caps() const { return fCallbackContexts[0]->caps(); }
 
         const GrBackendTexture& backendTexture(int index) const {
-            SkASSERT(index >= 0 && index < (this->isYUV() ? SkYUVSizeInfo::kMaxCount : 1));
+            SkASSERT(index >= 0 && index < (this->isYUV() ? 3 : 1));
             return fCallbackContexts[index]->backendTexture();
         }
 
         void setNormalBitmap(const SkBitmap& bm) { fBitmap = bm; }
 
-        void setYUVData(sk_sp<SkCachedData> yuvData,
-                        SkYUVAIndex yuvaIndices[SkYUVAIndex::kIndexCount],
-                        SkYUVColorSpace cs) {
+        void setYUVData(sk_sp<SkCachedData> yuvData, SkYUVColorSpace cs) {
             fYUVData = yuvData;
-            memcpy(fYUVAIndices, yuvaIndices, sizeof(fYUVAIndices));
             fYUVColorSpace = cs;
         }
         void addYUVPlane(int index, const SkImageInfo& ii, const void* plane, size_t widthBytes) {
             SkASSERT(this->isYUV());
-            SkASSERT(index >= 0 && index < SkYUVSizeInfo::kMaxCount);
+            SkASSERT(index >= 0 && index < 3);
             fYUVPlanes[index].reset(ii, plane, widthBytes);
         }
 
@@ -179,11 +170,10 @@
         // CPU-side cache of a YUV SkImage's contents
         sk_sp<SkCachedData>                fYUVData;       // when !null, this is a YUV image
         SkYUVColorSpace                    fYUVColorSpace = kJPEG_SkYUVColorSpace;
-        SkYUVAIndex                        fYUVAIndices[SkYUVAIndex::kIndexCount];
-        SkPixmap                           fYUVPlanes[SkYUVSizeInfo::kMaxCount];
+        SkPixmap                           fYUVPlanes[3];
 
-        // Up to SkYUVSizeInfo::kMaxCount for a YUVA image. Only one for a normal image.
-        sk_sp<PromiseImageCallbackContext> fCallbackContexts[SkYUVSizeInfo::kMaxCount];
+        // Up to 3 for a YUV image. Only one for a normal image.
+        sk_sp<PromiseImageCallbackContext> fCallbackContexts[3];
     };
 
     // This stack-based context allows each thread to re-inflate the image indices into