Remove GlyphBuffer

third_party/WebKit/Source/platform/fonts/shaping/ShapeResultBloberizer.cpp

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "platform/fonts/shaping/ShapeResultBloberizer.h"
+
+#include "platform/fonts/Font.h"
+#include "platform/fonts/shaping/CachingWordShaper.h"
+#include "platform/text/TextRun.h"
+
+namespace blink {
+
+ShapeResultBloberizer::ShapeResultBloberizer(const Font& font,
+                                             float deviceScaleFactor,
+                                             Type type)
+    : m_font(font), m_deviceScaleFactor(deviceScaleFactor), m_type(type) {}
+
+bool ShapeResultBloberizer::hasPendingVerticalOffsets() const {
+  // We exclusively store either horizontal/x-only ofssets -- in which case
+  // m_offsets.size == size, or vertical/xy offsets -- in which case
+  // m_offsets.size == size * 2.
+  DCHECK(m_pendingGlyphs.size() == m_pendingOffsets.size() ||
+         m_pendingGlyphs.size() * 2 == m_pendingOffsets.size());
+  return m_pendingGlyphs.size() != m_pendingOffsets.size();
+}
+
+void ShapeResultBloberizer::commitPendingRun() {
+  if (m_pendingGlyphs.isEmpty())
+    return;
+
+  const auto pendingRotation = blobRotation(m_pendingFontData);
+  if (pendingRotation != m_builderRotation) {
+    // The pending run rotation doesn't match the current blob; start a new
+    // blob.
+    commitPendingBlob();
+    m_builderRotation = pendingRotation;
+  }
+
+  SkPaint runPaint;
+  runPaint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
+  m_pendingFontData->platformData().setupPaint(&runPaint, m_deviceScaleFactor,
+                                               &m_font);
+
+  const auto runSize = m_pendingGlyphs.size();
+  const auto& buffer = hasPendingVerticalOffsets()
+                           ? m_builder.allocRunPos(runPaint, runSize)
+                           : m_builder.allocRunPosH(runPaint, runSize, 0);
+
+  std::copy(m_pendingGlyphs.begin(), m_pendingGlyphs.end(), buffer.glyphs);
+  std::copy(m_pendingOffsets.begin(), m_pendingOffsets.end(), buffer.pos);
+
+  m_builderRunCount += 1;
+  m_pendingGlyphs.shrink(0);
+  m_pendingOffsets.shrink(0);
+}
+
+void ShapeResultBloberizer::commitPendingBlob() {
+  if (!m_builderRunCount)
+    return;
+
+  m_blobs.emplace_back(m_builder.make(), m_builderRotation);
+  m_builderRunCount = 0;
+}
+
+const ShapeResultBloberizer::BlobBuffer& ShapeResultBloberizer::blobs() {
+  commitPendingRun();
+  commitPendingBlob();
+  DCHECK(m_pendingGlyphs.isEmpty());
+  DCHECK_EQ(m_builderRunCount, 0u);
+
+  return m_blobs;
+}
+
+ShapeResultBloberizer::BlobRotation ShapeResultBloberizer::blobRotation(
+    const SimpleFontData* fontData) {
+  // For vertical upright text we need to compensate the inherited 90deg CW
+  // rotation (using a 90deg CCW rotation).
+  return (fontData->platformData().isVerticalAnyUpright() &&
+          fontData->verticalData())
+             ? BlobRotation::CCWRotation
+             : BlobRotation::NoRotation;
+}
+
+}  // namespace blink