1 files changed, 121 insertions, 0 deletions
diff --git a/core/fxge/fx_ge_text.cpp b/core/fxge/fx_ge_text.cpp
new file mode 100644
index 0000000000..0832f7a020
--- /dev/null
+++ b/core/fxge/fx_ge_text.cpp
@@ -0,0 +1,121 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include <algorithm>
+#include <limits>
+#include <vector>
+
+#include "core/fxcodec/fx_codec.h"
+#include "core/fxcrt/fx_safe_types.h"
+#include "core/fxge/cfx_pathdata.h"
+#include "core/fxge/fx_freetype.h"
+#include "core/fxge/fx_text_int.h"
+#include "core/fxge/ifx_renderdevicedriver.h"
+
+namespace {
+
+void ResetTransform(FT_Face face) {
+  FXFT_Matrix matrix;
+  matrix.xx = 0x10000L;
+  matrix.xy = 0;
+  matrix.yx = 0;
+  matrix.yy = 0x10000L;
+  FXFT_Set_Transform(face, &matrix, 0);
+}
+
+}  // namespace
+
+FXTEXT_GLYPHPOS::FXTEXT_GLYPHPOS() : m_pGlyph(nullptr) {}
+
+FXTEXT_GLYPHPOS::FXTEXT_GLYPHPOS(const FXTEXT_GLYPHPOS&) = default;
+
+FXTEXT_GLYPHPOS::~FXTEXT_GLYPHPOS(){};
+
+ScopedFontTransform::ScopedFontTransform(FT_Face face, FXFT_Matrix* matrix)
+    : m_Face(face) {
+  FXFT_Set_Transform(m_Face, matrix, 0);
+}
+
+ScopedFontTransform::~ScopedFontTransform() {
+  ResetTransform(m_Face);
+}
+
+FX_RECT FXGE_GetGlyphsBBox(const std::vector<FXTEXT_GLYPHPOS>& glyphs,
+                           int anti_alias,
+                           float retinaScaleX,
+                           float retinaScaleY) {
+  FX_RECT rect(0, 0, 0, 0);
+  bool bStarted = false;
+  for (const FXTEXT_GLYPHPOS& glyph : glyphs) {
+    const CFX_GlyphBitmap* pGlyph = glyph.m_pGlyph;
+    if (!pGlyph)
+      continue;
+
+    FX_SAFE_INT32 char_left = glyph.m_Origin.x;
+    char_left += pGlyph->m_Left;
+    if (!char_left.IsValid())
+      continue;
+
+    FX_SAFE_INT32 char_width = pGlyph->m_pBitmap->GetWidth();
+    char_width /= retinaScaleX;
+    if (anti_alias == FXFT_RENDER_MODE_LCD)
+      char_width /= 3;
+    if (!char_width.IsValid())
+      continue;
+
+    FX_SAFE_INT32 char_right = char_left + char_width;
+    if (!char_right.IsValid())
+      continue;
+
+    FX_SAFE_INT32 char_top = glyph.m_Origin.y;
+    char_top -= pGlyph->m_Top;
+    if (!char_top.IsValid())
+      continue;
+
+    FX_SAFE_INT32 char_height = pGlyph->m_pBitmap->GetHeight();
+    char_height /= retinaScaleY;
+    if (!char_height.IsValid())
+      continue;
+
+    FX_SAFE_INT32 char_bottom = char_top + char_height;
+    if (!char_bottom.IsValid())
+      continue;
+
+    if (bStarted) {
+      rect.left = pdfium::base::ValueOrDieForType<int32_t>(
+          pdfium::base::CheckMin(rect.left, char_left));
+      rect.right = pdfium::base::ValueOrDieForType<int32_t>(
+          pdfium::base::CheckMax(rect.right, char_right));
+      rect.top = pdfium::base::ValueOrDieForType<int32_t>(
+          pdfium::base::CheckMin(rect.top, char_top));
+      rect.bottom = pdfium::base::ValueOrDieForType<int32_t>(
+          pdfium::base::CheckMax(rect.bottom, char_bottom));
+      continue;
+    }
+
+    rect.left = char_left.ValueOrDie();
+    rect.right = char_right.ValueOrDie();
+    rect.top = char_top.ValueOrDie();
+    rect.bottom = char_bottom.ValueOrDie();
+    bStarted = true;
+  }
+  return rect;
+}
+
+CFX_SizeGlyphCache::CFX_SizeGlyphCache() {}
+
+CFX_SizeGlyphCache::~CFX_SizeGlyphCache() {}
+
+void CFX_UniqueKeyGen::Generate(int count, ...) {
+  va_list argList;
+  va_start(argList, count);
+  for (int i = 0; i < count; i++) {
+    int p = va_arg(argList, int);
+    ((uint32_t*)m_Key)[i] = p;
+  }
+  va_end(argList);
+  m_KeyLen = count * sizeof(uint32_t);
+}