From 80eb42ba9ee8b09a71d229ae8422c93e5c59f201 Mon Sep 17 00:00:00 2001
From: Herb Derby <herb@google.com>
Date: Fri, 27 Jul 2018 16:46:49 -0400
Subject: Take advantage of newly const ref text stack

Change-Id: Ib09669cbacc7b466c268af7a7bc1341b7d9e9916
Reviewed-on: https://skia-review.googlesource.com/144124
Commit-Queue: Herb Derby <herb@google.com>
Auto-Submit: Herb Derby <herb@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
---
 src/core/SkGlyphRun.cpp | 31 +++++++------------------------
 src/core/SkGlyphRun.h   |  2 +-
 2 files changed, 8 insertions(+), 25 deletions(-)

diff --git a/src/core/SkGlyphRun.cpp b/src/core/SkGlyphRun.cpp
index 7683325c5b..006a4ba067 100644
--- a/src/core/SkGlyphRun.cpp
+++ b/src/core/SkGlyphRun.cpp
@@ -465,7 +465,7 @@ void SkGlyphRunBuilder::drawPosText(const SkPaint& paint, const void* bytes,
     if (!glyphIDs.empty()) {
         this->initialize(glyphIDs.size());
         this->simplifyDrawPosText(paint, glyphIDs, pos,
-                fUniqueGlyphIDIndices, fUniqueGlyphIDs, fPositions);
+                fUniqueGlyphIDIndices, fUniqueGlyphIDs);
     }
 
     this->makeGlyphRunList(paint, nullptr, SkPoint::Make(0, 0));
@@ -521,7 +521,7 @@ void SkGlyphRunBuilder::drawTextBlob(const SkPaint& paint, const SkTextBlob& blo
             case SkTextBlobRunIterator::kFull_Positioning:
                 uniqueGlyphIDsSize = this->simplifyDrawPosText(
                         runPaint, glyphIDs, (const SkPoint*)it.pos(),
-                        currentDenseIndices, currentUniqueGlyphIDs, currentPositions,
+                        currentDenseIndices, currentUniqueGlyphIDs,
                         text, clusters);
                 break;
         }
@@ -678,35 +678,20 @@ size_t SkGlyphRunBuilder::simplifyDrawPosTextH(
         const SkScalar* xpos, SkScalar constY,
         uint16_t* uniqueGlyphIDIndicesBuffer, SkGlyphID* uniqueGlyphIDsBuffer, SkPoint* positions,
         SkSpan<const char> text, SkSpan<const uint32_t> clusters) {
-    auto runSize = glyphIDs.size();
 
     auto posCursor = positions;
     for (auto x : SkSpan<const SkScalar>{xpos, glyphIDs.size()}) {
         *posCursor++ = SkPoint::Make(x, constY);
     }
 
-    // The dense indices are not used by the rest of the stack yet.
-    SkSpan<const SkGlyphID> uniqueGlyphIDs;
-    #ifdef SK_DEBUG
-        uniqueGlyphIDs = this->addDenseAndUnique(
-                paint, glyphIDs, uniqueGlyphIDIndicesBuffer, uniqueGlyphIDsBuffer);
-    #endif
-
-    this->makeGlyphRun(
-            paint,
-            glyphIDs,
-            SkSpan<const SkPoint>{positions, runSize},
-            SkSpan<const SkGlyphID>{uniqueGlyphIDIndicesBuffer, runSize},
-            uniqueGlyphIDs,
-            text,
-            clusters);
-
-    return uniqueGlyphIDs.size();
+    return simplifyDrawPosText(paint, glyphIDs, positions,
+            uniqueGlyphIDIndicesBuffer, uniqueGlyphIDsBuffer,
+            text, clusters);
 }
 
 size_t SkGlyphRunBuilder::simplifyDrawPosText(
         const SkPaint& paint, SkSpan<const SkGlyphID> glyphIDs, const SkPoint* pos,
-        uint16_t* uniqueGlyphIDIndicesBuffer, SkGlyphID* uniqueGlyphIDsBuffer, SkPoint* positions,
+        uint16_t* uniqueGlyphIDIndicesBuffer, SkGlyphID* uniqueGlyphIDsBuffer,
         SkSpan<const char> text, SkSpan<const uint32_t> clusters) {
     auto runSize = glyphIDs.size();
 
@@ -717,14 +702,12 @@ size_t SkGlyphRunBuilder::simplifyDrawPosText(
                 paint, glyphIDs, uniqueGlyphIDIndicesBuffer, uniqueGlyphIDsBuffer);
     #endif
 
-    memcpy(positions, pos, runSize * sizeof(SkPoint));
-
     // TODO: when using the unique glyph system have a guard that there are actually glyphs like
     // drawText above.
     this->makeGlyphRun(
             paint,
             glyphIDs,
-            SkSpan<const SkPoint>{positions, runSize},
+            SkSpan<const SkPoint>{pos, runSize},
             SkSpan<const SkGlyphID>{uniqueGlyphIDIndicesBuffer, runSize},
             uniqueGlyphIDs,
             text,
diff --git a/src/core/SkGlyphRun.h b/src/core/SkGlyphRun.h
index fc85c3ec03..003c13c91c 100644
--- a/src/core/SkGlyphRun.h
+++ b/src/core/SkGlyphRun.h
@@ -279,7 +279,7 @@ private:
             SkSpan<const uint32_t> clusters = SkSpan<const uint32_t>{});
     size_t simplifyDrawPosText(
             const SkPaint& paint, SkSpan<const SkGlyphID> glyphIDs, const SkPoint* pos,
-            uint16_t* uniqueGlyphIDIndices, SkGlyphID* uniqueGlyphIDs, SkPoint* positions,
+            uint16_t* uniqueGlyphIDIndices, SkGlyphID* uniqueGlyphIDs,
             SkSpan<const char> text = SkSpan<const char>{},
             SkSpan<const uint32_t> clusters = SkSpan<const uint32_t>{});
 
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