Add the pdf plugin's source in src\pdf.

pdf/number_image_generator.cc

+// Copyright (c) 2012 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 "pdf/number_image_generator.h"
+
+#include "base/logging.h"
+#include "base/strings/string_util.h"
+#include "pdf/draw_utils.h"
+#include "pdf/instance.h"
+
+namespace chrome_pdf {
+
+const int kPageNumberSeparator = 0;
+const int kPageNumberOriginX = 8;
+const int kPageNumberOriginY = 4;
+
+NumberImageGenerator::NumberImageGenerator(Instance* instance)
+    : instance_(instance),
+      device_scale_(1.0f) {
+}
+
+NumberImageGenerator::~NumberImageGenerator() {
+}
+
+void NumberImageGenerator::Configure(const pp::ImageData& number_background,
+    const std::vector<pp::ImageData>& number_images, float device_scale) {
+  number_background_ = number_background;
+  number_images_ = number_images;
+  device_scale_ = device_scale;
+}
+
+void NumberImageGenerator::GenerateImage(
+    int page_number, pp::ImageData* image) {
+  char buffer[12];
+  base::snprintf(buffer, sizeof(buffer), "%u", page_number);
+  int extra_width = 0;
+  DCHECK(number_images_.size() >= 10);
+  DCHECK(!number_background_.is_null());
+  for (size_t i = 1; i < strlen(buffer); ++i) {
+    int index = buffer[i] - '0';
+    extra_width += number_images_[index].size().width();
+    extra_width += static_cast<int>(kPageNumberSeparator * device_scale_);
+  }
+
+  *image = pp::ImageData(
+      instance_,
+      PP_IMAGEDATAFORMAT_BGRA_PREMUL,
+      pp::Size(number_background_.size().width() + extra_width,
+               number_background_.size().height()),
+      false);
+
+  int stretch_point = number_background_.size().width() / 2;
+
+  pp::Rect src_rc(0, 0, stretch_point, number_background_.size().height());
+  pp::Rect dest_rc(src_rc);
+  CopyImage(number_background_, src_rc, image, dest_rc, false);
+  src_rc.Offset(number_background_.size().width() - stretch_point, 0);
+  dest_rc.Offset(image->size().width() - stretch_point, 0);
+  CopyImage(number_background_, src_rc, image, dest_rc, false);
+  src_rc = pp::Rect(stretch_point, 0, 1, number_background_.size().height());
+  dest_rc = src_rc;
+  dest_rc.set_width(extra_width + 1);
+  CopyImage(number_background_, src_rc, image, dest_rc, true);
+
+  pp::Point origin(static_cast<int>(kPageNumberOriginX * device_scale_),
+                   static_cast<int>(kPageNumberOriginY * device_scale_));
+  for (size_t i = 0; i < strlen(buffer); ++i) {
+    int index = buffer[i] - '0';
+    CopyImage(
+        number_images_[index],
+        pp::Rect(pp::Point(), number_images_[index].size()),
+        image, pp::Rect(origin, number_images_[index].size()), false);
+    origin += pp::Point(
+        number_images_[index].size().width() +
+        static_cast<int>(kPageNumberSeparator * device_scale_), 0);
+  }
+}
+
+}  // namespace chrome_pdf
+