linux: Add tests for FontRenderParams on Linux.

ui/gfx/test/fontconfig_util_linux.cc

+// Copyright 2014 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 "ui/gfx/test/fontconfig_util_linux.h"
+
+#include <fontconfig/fontconfig.h>
+
+#include "base/file_util.h"
+#include "base/logging.h"
+#include "base/strings/stringprintf.h"
+
+namespace gfx {
+
+const char* const kSystemFontsForFontconfig[] = {
+  "/usr/share/fonts/truetype/kochi/kochi-gothic.ttf",
+  "/usr/share/fonts/truetype/kochi/kochi-mincho.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Arial.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Arial_Bold.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Arial_Bold_Italic.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Arial_Italic.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Comic_Sans_MS.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Comic_Sans_MS_Bold.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Courier_New.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Courier_New_Bold.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Courier_New_Bold_Italic.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Courier_New_Italic.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Georgia.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Georgia_Bold.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Georgia_Bold_Italic.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Georgia_Italic.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Impact.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Trebuchet_MS.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Trebuchet_MS_Bold.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Trebuchet_MS_Bold_Italic.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Trebuchet_MS_Italic.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Times_New_Roman.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Times_New_Roman_Bold.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Times_New_Roman_Bold_Italic.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Times_New_Roman_Italic.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Verdana.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Verdana_Bold.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Verdana_Bold_Italic.ttf",
+  "/usr/share/fonts/truetype/msttcorefonts/Verdana_Italic.ttf",
+  // The DejaVuSans font is used by the css2.1 tests.
+  "/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf",
+  "/usr/share/fonts/truetype/ttf-indic-fonts-core/lohit_hi.ttf",
+  "/usr/share/fonts/truetype/ttf-indic-fonts-core/lohit_ta.ttf",
+  "/usr/share/fonts/truetype/ttf-indic-fonts-core/MuktiNarrow.ttf",
+};
+
+const size_t kNumSystemFontsForFontconfig =
+    arraysize(kSystemFontsForFontconfig);
+
+const char kFontconfigFileHeader[] =
+    "<?xml version=\"1.0\"?>\n"
+    "<!DOCTYPE fontconfig SYSTEM \"fonts.dtd\">\n"
+    "<fontconfig>\n";
+const char kFontconfigFileFooter[] = "</fontconfig>";
+const char kFontconfigMatchHeader[] = "  <match>\n";
+const char kFontconfigMatchFooter[] = "  </match>\n";
+
+void SetUpFontconfig() {
+  FcInit();
+
+  // A primer on undocumented FcConfig reference-counting:
+  //
+  // - FcConfigCreate() creates a config with a refcount of 1.
+  // - FcConfigReference() increments a config's refcount.
+  // - FcConfigDestroy() decrements a config's refcount, deallocating the
+  //   config when the count reaches 0.
+  // - FcConfigSetCurrent() calls FcConfigDestroy() on the old config, but
+  //   interestingly does not call FcConfigReference() on the new config.
+  CHECK(FcConfigSetCurrent(FcConfigCreate()));
+}
+
+void TearDownFontconfig() {
+  FcFini();
+}
+
+bool LoadFontIntoFontconfig(const base::FilePath& path) {
+  if (!base::PathExists(path)) {
+    LOG(ERROR) << "You are missing " << path.value() << ". Try re-running "
+               << "build/install-build-deps.sh. Also see "
+               << "http://code.google.com/p/chromium/wiki/LayoutTestsLinux";
+    return false;
+  }
+
+  if (!FcConfigAppFontAddFile(
+          NULL, reinterpret_cast<const FcChar8*>(path.value().c_str()))) {
+    LOG(ERROR) << "Failed to load font " << path.value();
+    return false;
+  }
+
+  return true;
+}
+
+bool LoadConfigFileIntoFontconfig(const base::FilePath& path) {
+  // Unlike other FcConfig functions, FcConfigParseAndLoad() doesn't default to
+  // the current config when passed NULL. So that's cool.
+  if (!FcConfigParseAndLoad(FcConfigGetCurrent(),
+          reinterpret_cast<const FcChar8*>(path.value().c_str()), FcTrue)) {
+    LOG(ERROR) << "Fontconfig failed to load " << path.value();
+    return false;
+  }
+  return true;
+}
+
+bool LoadConfigDataIntoFontconfig(const base::FilePath& temp_dir,
+                                  const std::string& data) {
+  base::FilePath path;
+  if (!CreateTemporaryFileInDir(temp_dir, &path)) {
+    PLOG(ERROR) << "Unable to create temporary file in " << temp_dir.value();
+    return false;
+  }
+  if (base::WriteFile(path, data.data(), data.size()) !=
+      static_cast<int>(data.size())) {
+    PLOG(ERROR) << "Unable to write config data to " << path.value();
+    return false;
+  }
+  return LoadConfigFileIntoFontconfig(path);
+}
+
+std::string CreateFontconfigEditStanza(const std::string& name,
+                                       const std::string& type,
+                                       const std::string& value) {
+  return base::StringPrintf(
+      "    <edit name=\"%s\" mode=\"assign\">\n"
+      "      <%s>%s</%s>\n"
+      "    </edit>\n",
+      name.c_str(), type.c_str(), value.c_str(), type.c_str());
+}
+
+std::string CreateFontconfigTestStanza(const std::string& name,
+                                       const std::string& op,
+                                       const std::string& type,
+                                       const std::string& value) {
+  return base::StringPrintf(
+      "    <test name=\"%s\" compare=\"%s\" qual=\"any\">\n"
+      "      <%s>%s</%s>\n"
+      "    </test>\n",
+      name.c_str(), op.c_str(), type.c_str(), value.c_str(), type.c_str());
+}
+
+}  // namespace gfx