Revert of adding gm to use random scaler context (patchset #4 id:60001 of https://codereview.chromium.org/1268853008/)

Reason for revert:
breaking bots

Original issue's description:
> adding gm to use random scaler context
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/853336c532504b3436d7dcbf252419f00c79066d

TBR=bsalomon@google.com,joshualitt@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1259033004

1 files changed, 50 insertions, 1 deletions

diff --git a/src/fonts/SkRandomScalerContext.cpp b/src/fonts/SkRandomScalerContext.cpp
index 0693682faa..34392d6ed3 100644
--- a/src/fonts/SkRandomScalerContext.cpp
+++ b/src/fonts/SkRandomScalerContext.cpp
@@ -28,6 +28,7 @@ protected:
 private:
     SkRandomTypeface*     fFace;
     SkScalerContext* fProxy;
+    SkMatrix         fMatrix;
     bool fFakeIt;
 };
 
@@ -40,7 +41,28 @@ SkRandomScalerContext::SkRandomScalerContext(SkRandomTypeface* face, const SkDes
         : SkScalerContext(face, desc)
         , fFace(face)
         , fFakeIt(fakeIt) {
-    fProxy = face->proxy()->createScalerContext(desc);
+    size_t  descSize = SkDescriptor::ComputeOverhead(1) + sizeof(SkScalerContext::Rec);
+    SkAutoDescriptor ad(descSize);
+    SkDescriptor*    newDesc = ad.getDesc();
+
+    newDesc->init();
+    void* entry = newDesc->addEntry(kRec_SkDescriptorTag,
+                                    sizeof(SkScalerContext::Rec), &fRec);
+    {
+        SkScalerContext::Rec* rec = (SkScalerContext::Rec*)entry;
+        rec->fTextSize = STD_SIZE;
+        rec->fPreScaleX = SK_Scalar1;
+        rec->fPreSkewX = 0;
+        rec->fPost2x2[0][0] = rec->fPost2x2[1][1] = SK_Scalar1;
+        rec->fPost2x2[1][0] = rec->fPost2x2[0][1] = 0;
+    }
+    SkASSERT(descSize == newDesc->getLength());
+    newDesc->computeChecksum();
+
+    fProxy = face->proxy()->createScalerContext(newDesc);
+
+    fRec.getSingleMatrix(&fMatrix);
+    fMatrix.preScale(SK_Scalar1 / STD_SIZE, SK_Scalar1 / STD_SIZE);
 }
 
 SkRandomScalerContext::~SkRandomScalerContext() {
@@ -57,6 +79,12 @@ uint16_t SkRandomScalerContext::generateCharToGlyph(SkUnichar uni) {
 
 void SkRandomScalerContext::generateAdvance(SkGlyph* glyph) {
     fProxy->getAdvance(glyph);
+
+    SkVector advance;
+    fMatrix.mapXY(SkFixedToScalar(glyph->fAdvanceX),
+                  SkFixedToScalar(glyph->fAdvanceY), &advance);
+    glyph->fAdvanceX = SkScalarToFixed(advance.fX);
+    glyph->fAdvanceY = SkScalarToFixed(advance.fY);
 }
 
 void SkRandomScalerContext::generateMetrics(SkGlyph* glyph) {
@@ -82,8 +110,15 @@ void SkRandomScalerContext::generateMetrics(SkGlyph* glyph) {
         return;
     }
     if (SkMask::kARGB32_Format == format) {
+        SkVector advance;
+        fMatrix.mapXY(SkFixedToScalar(glyph->fAdvanceX),
+                      SkFixedToScalar(glyph->fAdvanceY), &advance);
+        glyph->fAdvanceX = SkScalarToFixed(advance.fX);
+        glyph->fAdvanceY = SkScalarToFixed(advance.fY);
+
         SkPath path;
         fProxy->getPath(*glyph, &path);
+        path.transform(fMatrix);
 
         SkRect storage;
         const SkPaint& paint = fFace->paint();
@@ -160,6 +195,7 @@ void SkRandomScalerContext::generateImage(const SkGlyph& glyph) {
             SkCanvas canvas(bm);
             canvas.translate(-SkIntToScalar(glyph.fLeft),
                              -SkIntToScalar(glyph.fTop));
+            canvas.concat(fMatrix);
             canvas.drawPath(path, fFace->paint());
         } else {
             fProxy->forceGenerateImageFromPath();
@@ -173,10 +209,23 @@ void SkRandomScalerContext::generateImage(const SkGlyph& glyph) {
 
 void SkRandomScalerContext::generatePath(const SkGlyph& glyph, SkPath* path) {
     fProxy->getPath(glyph, path);
+    path->transform(fMatrix);
 }
 
 void SkRandomScalerContext::generateFontMetrics(SkPaint::FontMetrics* metrics) {
     fProxy->getFontMetrics(metrics);
+    if (metrics) {
+        SkScalar scale = fMatrix.getScaleY();
+        metrics->fTop = SkScalarMul(metrics->fTop, scale);
+        metrics->fAscent = SkScalarMul(metrics->fAscent, scale);
+        metrics->fDescent = SkScalarMul(metrics->fDescent, scale);
+        metrics->fBottom = SkScalarMul(metrics->fBottom, scale);
+        metrics->fLeading = SkScalarMul(metrics->fLeading, scale);
+        metrics->fAvgCharWidth = SkScalarMul(metrics->fAvgCharWidth, scale);
+        metrics->fXMin = SkScalarMul(metrics->fXMin, scale);
+        metrics->fXMax = SkScalarMul(metrics->fXMax, scale);
+        metrics->fXHeight = SkScalarMul(metrics->fXHeight, scale);
+    }
 }
 
 ///////////////////////////////////////////////////////////////////////////////