Revert "Alloc glyph image correctly for SkMask::k3D_Format."

This reverts commit 6b26deb8d6067589ce9b7853ab8e8d39de1a45de.

Reason for revert: GPU bots failing

Original change's description:
> Alloc glyph image correctly for SkMask::k3D_Format.
> 
> This removes the no longer used outside Skia
> SK_SUPPORT_LEGACY_EMBOSSMASKFILTER define, and either deletes the code
> it guards or updates it to use the new emboss mask filter factory. This
> re-enables the code to test the emboss mask filter. Also added is a test
> to ensure that embossed text is drawn correctly, as before this glyphs
> did not allocate the proper amount of memory for the k3D_Format which
> this mask filter produces. This also fixes SkEmbossMask::Emboss to write
> the whole of the mul and add planes to avoid pixel differences and
> MemorySanitizer errors.
> 
> Change-Id: Ib492c72a19d6a27d140e3cd48179a3ca9ce313f5
> Reviewed-on: https://skia-review.googlesource.com/70260
> Commit-Queue: Ben Wagner <bungeman@google.com>
> Reviewed-by: Herb Derby <herb@google.com>

TBR=djsollen@google.com,bungeman@google.com,herb@google.com,reed@google.com

Change-Id: I8a9db6c00e0cb84bdd4833474a9ffffa6ecc606c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/70920
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/effects/SkBlurMaskFilter.h b/include/effects/SkBlurMaskFilter.h
index e000732a85..8b032e50ee 100644
--- a/include/effects/SkBlurMaskFilter.h
+++ b/include/effects/SkBlurMaskFilter.h
@@ -48,6 +48,19 @@ public:
         return Make(style, sigma, SkRect::MakeEmpty(), flags);
     }
 
+#ifdef SK_SUPPORT_LEGACY_EMBOSSMASKFILTER
+    /** Create an emboss maskfilter
+        @param blurSigma    standard deviation of the Gaussian blur to apply
+                            before applying lighting (e.g. 3)
+        @param direction    array of 3 scalars [x, y, z] specifying the direction of the light source
+        @param ambient      0...1 amount of ambient light
+        @param specular     coefficient for specular highlights (e.g. 8)
+        @return the emboss maskfilter
+    */
+    static sk_sp<SkMaskFilter> MakeEmboss(SkScalar blurSigma, const SkScalar direction[3],
+                                          SkScalar ambient, SkScalar specular);
+#endif
+
     static const int kMaxDivisions = 6;
 
     // This method computes all the parameters for drawing a partially occluded nine-patched