Mac: Infrastructure for serialization of OS fonts over IPC.

chrome/common/sandbox_mac_fontloading_unittest.mm

+// Copyright (c) 2010 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.
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/file_util.h"
+#include "base/logging.h"
+#include "base/scoped_cftyperef.h"
+#include "base/scoped_ptr.h"
+#include "base/shared_memory.h"
+#include "chrome/common/font_loader_mac.h"
+#include "chrome/common/sandbox_mac_unittest_helper.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+using sandboxtest::MacSandboxTest;
+
+class FontLoadingTestCase : public sandboxtest::MacSandboxTestCase {
+ public:
+  FontLoadingTestCase() : font_data_length_(-1) {}
+  virtual bool BeforeSandboxInit();
+  virtual bool SandboxedTest();
+ private:
+  scoped_ptr<base::SharedMemory> font_shmem_;
+  size_t font_data_length_;
+};
+REGISTER_SANDBOX_TEST_CASE(FontLoadingTestCase);
+
+
+// Load raw font data into shared memory object.
+bool FontLoadingTestCase::BeforeSandboxInit() {
+  std::string font_data;
+  if (!file_util::ReadFileToString(FilePath(test_data_.c_str()), &font_data)) {
+    LOG(ERROR) << "Failed to read font data from file (" << test_data_ << ")";
+    return false;
+  }
+
+  font_data_length_ = font_data.length();
+  if (font_data_length_ <= 0) {
+    LOG(ERROR) << "No font data: " << font_data_length_;
+    return false;
+  }
+
+  font_shmem_.reset(new base::SharedMemory);
+  if (!font_shmem_.get()) {
+    LOG(ERROR) << "Failed to create shared memory object.";
+    return false;
+  }
+
+  if (!font_shmem_->Create(L"", false, false, font_data_length_)) {
+    LOG(ERROR) << "SharedMemory::Create failed";
+    return false;
+  }
+
+  if (!font_shmem_->Map(font_data_length_)) {
+    LOG(ERROR) << "SharedMemory::Map failed";
+    return false;
+  }
+
+  memcpy(font_shmem_->memory(), font_data.c_str(), font_data_length_);
+  if (!font_shmem_->Unmap())  {
+    LOG(ERROR) << "SharedMemory::Unmap failed";
+    return false;
+  }
+  return true;
+}
+
+bool FontLoadingTestCase::SandboxedTest() {
+  base::SharedMemoryHandle shmem_handle;
+  if (!font_shmem_->ShareToProcess(NULL, &shmem_handle)) {
+    LOG(ERROR) << "SharedMemory::ShareToProcess failed";
+    return false;
+  }
+
+  CGFontRef font_ref;
+  if (!FontLoader::CreateCGFontFromBuffer(shmem_handle, font_data_length_,
+          &font_ref)) {
+    LOG(ERROR) << "Call to CreateCGFontFromBuffer() failed";
+    return false;
+  }
+
+  scoped_cftyperef<CGFontRef> cgfont;
+
+  if (!font_ref) {
+    LOG(ERROR) << "Got NULL CGFontRef";
+    return false;
+  }
+  cgfont.reset(font_ref);
+
+  const NSFont* nsfont = reinterpret_cast<const NSFont*>(
+                         CTFontCreateWithGraphicsFont(cgfont.get(), 16.0,
+                            NULL, NULL));
+  if (!nsfont) {
+    LOG(ERROR) << "CTFontCreateWithGraphicsFont() failed";
+    return false;
+  }
+
+  // Do something with the font to make sure it's loaded.
+  CGFloat cap_height = [nsfont capHeight];
+
+  if (cap_height <= 0.0) {
+    LOG(ERROR) << "Got bad value for [NSFont capHeight] " << cap_height;
+    return false;
+  }
+
+  return true;
+}
+
+TEST_F(MacSandboxTest, FontLoadingTest) {
+  FilePath temp_file_path;
+  FILE* temp_file = file_util::CreateAndOpenTemporaryFile(&temp_file_path);
+  ASSERT_TRUE(temp_file);
+  file_util::ScopedFILE temp_file_closer(temp_file);
+
+  base::SharedMemory font_data;
+  uint32 font_data_size;
+  EXPECT_TRUE(FontLoader::LoadFontIntoBuffer(ASCIIToUTF16("Geeza Pro"), 16.0,
+                  &font_data, &font_data_size));
+  EXPECT_GT(font_data_size, 0U);
+
+  file_util::WriteFileDescriptor(fileno(temp_file),
+      static_cast<const char *>(font_data.memory()), font_data_size);
+
+  ASSERT_TRUE(RunTestInSandbox(sandbox::SANDBOX_TYPE_RENDERER,
+                  "FontLoadingTestCase", temp_file_path.value().c_str()));
+  temp_file_closer.reset();
+  ASSERT_TRUE(file_util::Delete(temp_file_path, false));
+}
+
+}  // namespace