Revert "Fix SkLocalMatrixShader::isAImage() to respect local matrix and image local matrix"

This reverts commit e5efa51b2acc86d1993132348d5b465855a653cc.

Reason for revert: MSAN

Original change's description:
> Fix SkLocalMatrixShader::isAImage() to respect local matrix and image local matrix
> 
> Fixes cts tests.
> 
> b/37161109
> b/37237678
> 
> Bug: skia:
> Change-Id: Ida9ac5e4261e8a6b22e8cdc0e585e0e7929dbbfd
> Reviewed-on: https://skia-review.googlesource.com/13249
> Commit-Queue: Mike Klein <mtklein@chromium.org>
> Reviewed-by: Mike Klein <mtklein@chromium.org>
> 

TBR=mtklein@chromium.org,mtklein@google.com,msarett@google.com,reviews@skia.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: I2b78c7b32997344136c784dc77675dafca37565e
Reviewed-on: https://skia-review.googlesource.com/13259
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Matt Sarett <msarett@google.com>

4 files changed, 3 insertions, 73 deletions

diff --git a/gm/localmatriximageshader.cpp b/gm/localmatriximageshader.cpp
deleted file mode 100644
index 2c9fcd2601..0000000000
--- a/gm/localmatriximageshader.cpp
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "gm.h"
-#include "SkCanvas.h"
-#include "SkSurface.h"
-
-static sk_sp<SkImage> make_image(SkCanvas* rootCanvas, SkColor color) {
-    SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);
-    auto surface(rootCanvas->makeSurface(info));
-    if (!surface) {
-        surface = SkSurface::MakeRaster(info);
-    }
-
-    SkPaint paint;
-    paint.setAntiAlias(true);
-    paint.setColor(color);
-    surface->getCanvas()->drawIRect(SkIRect::MakeXYWH(25, 25, 50, 50), paint);
-    return surface->makeImageSnapshot();
-}
-
-DEF_SIMPLE_GM(localmatriximageshader, canvas, 250, 250) {
-    sk_sp<SkImage> redImage = make_image(canvas, SK_ColorRED);
-    SkMatrix translate = SkMatrix::MakeTrans(100.0f, 0.0f);
-    SkMatrix rotate;
-    rotate.setRotate(45.0f);
-    sk_sp<SkShader> redImageShader = redImage->makeShader(SkShader::TileMode::kClamp_TileMode,
-            SkShader::TileMode::kClamp_TileMode, &translate);
-    sk_sp<SkShader> redLocalMatrixShader = redImageShader->makeWithLocalMatrix(rotate);
-
-    // Rotate about the origin will happen first.
-    SkPaint paint;
-    paint.setShader(redLocalMatrixShader);
-    canvas->drawIRect(SkIRect::MakeWH(250, 250), paint);
-
-    sk_sp<SkImage> blueImage = make_image(canvas, SK_ColorBLUE);
-    sk_sp<SkShader> blueImageShader = blueImage->makeShader(SkShader::TileMode::kClamp_TileMode,
-            SkShader::TileMode::kClamp_TileMode, &rotate);
-    sk_sp<SkShader> blueLocalMatrixShader = blueImageShader->makeWithLocalMatrix(translate);
-
-    // Translate will happen first.
-    paint.setShader(blueLocalMatrixShader);
-    canvas->drawIRect(SkIRect::MakeWH(250, 250), paint);
-
-    canvas->translate(100.0f, 0.0f);
-
-    // Use isAImage() and confirm that the shaders will draw exactly the same (to the right by 100).
-    SkShader::TileMode mode[2];
-    SkMatrix matrix;
-    SkImage* image = redLocalMatrixShader->isAImage(&matrix, mode);
-    paint.setShader(image->makeShader(mode[0], mode[1], &matrix));
-    canvas->drawIRect(SkIRect::MakeWH(250, 250), paint);
-    image = blueLocalMatrixShader->isAImage(&matrix, mode);
-    paint.setShader(image->makeShader(mode[0], mode[1], &matrix));
-    canvas->drawIRect(SkIRect::MakeWH(250, 250), paint);
-}
diff --git a/gn/gm.gni b/gn/gm.gni
index 67d2ced10a..65c6766ebb 100644
--- a/gn/gm.gni
+++ b/gn/gm.gni
@@ -188,7 +188,6 @@ gm_sources = [
   "$_gm/lightingshaderbevel.cpp",
   "$_gm/linepaths.cpp",
   "$_gm/localmatriximagefilter.cpp",
-  "$_gm/localmatriximageshader.cpp",
   "$_gm/lumafilter.cpp",
   "$_gm/manypaths.cpp",
   "$_gm/matrixconvolution.cpp",
diff --git a/src/core/SkLocalMatrixShader.cpp b/src/core/SkLocalMatrixShader.cpp
index 22eb0fec93..9d9e109fcb 100644
--- a/src/core/SkLocalMatrixShader.cpp
+++ b/src/core/SkLocalMatrixShader.cpp
@@ -51,17 +51,6 @@ SkShader::Context* SkLocalMatrixShader::onMakeContext(
     return fProxyShader->makeContext(newRec, alloc);
 }
 
-SkImage* SkLocalMatrixShader::onIsAImage(SkMatrix* outMatrix, enum TileMode* mode) const {
-    SkMatrix imageMatrix;
-    SkImage* image = fProxyShader->isAImage(&imageMatrix, mode);
-    if (outMatrix) {
-        // Local matrix must be applied first so it is on the right side of the concat.
-        *outMatrix = SkMatrix::Concat(imageMatrix, this->getLocalMatrix());
-    }
-
-    return image;
-}
-
 bool SkLocalMatrixShader::onAppendStages(SkRasterPipeline* p,
                                          SkColorSpace* dst,
                                          SkArenaAlloc* scratch,
diff --git a/src/core/SkLocalMatrixShader.h b/src/core/SkLocalMatrixShader.h
index cba140906b..5c0424053b 100644
--- a/src/core/SkLocalMatrixShader.h
+++ b/src/core/SkLocalMatrixShader.h
@@ -45,7 +45,9 @@ protected:
 
     Context* onMakeContext(const ContextRec&, SkArenaAlloc*) const override;
 
-    SkImage* onIsAImage(SkMatrix* matrix, TileMode* mode) const override;
+    SkImage* onIsAImage(SkMatrix* matrix, TileMode* mode) const override {
+        return fProxyShader->isAImage(matrix, mode);
+    }
 
     bool onAppendStages(SkRasterPipeline*, SkColorSpace*, SkArenaAlloc*,
                         const SkMatrix&, const SkPaint&, const SkMatrix*) const override;