1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "pdf/number_image_generator.h" 6 7 #include "base/logging.h" 8 #include "base/strings/string_util.h" 9 #include "pdf/draw_utils.h" 10 #include "pdf/instance.h" 11 12 namespace chrome_pdf { 13 14 const int kPageNumberSeparator = 0; 15 const int kPageNumberOriginX = 8; 16 const int kPageNumberOriginY = 4; 17 18 NumberImageGenerator::NumberImageGenerator(Instance* instance) 19 : instance_(instance), 20 device_scale_(1.0f) { 21 } 22 23 NumberImageGenerator::~NumberImageGenerator() { 24 } 25 26 void NumberImageGenerator::Configure(const pp::ImageData& number_background, 27 const std::vector<pp::ImageData>& number_images, float device_scale) { 28 number_background_ = number_background; 29 number_images_ = number_images; 30 device_scale_ = device_scale; 31 } 32 33 void NumberImageGenerator::GenerateImage( 34 int page_number, pp::ImageData* image) { 35 char buffer[12]; 36 base::snprintf(buffer, sizeof(buffer), "%u", page_number); 37 int extra_width = 0; 38 DCHECK(number_images_.size() >= 10); 39 DCHECK(!number_background_.is_null()); 40 for (size_t i = 1; i < strlen(buffer); ++i) { 41 int index = buffer[i] - '0'; 42 extra_width += number_images_[index].size().width(); 43 extra_width += static_cast<int>(kPageNumberSeparator * device_scale_); 44 } 45 46 *image = pp::ImageData( 47 instance_, 48 PP_IMAGEDATAFORMAT_BGRA_PREMUL, 49 pp::Size(number_background_.size().width() + extra_width, 50 number_background_.size().height()), 51 false); 52 53 int stretch_point = number_background_.size().width() / 2; 54 55 pp::Rect src_rc(0, 0, stretch_point, number_background_.size().height()); 56 pp::Rect dest_rc(src_rc); 57 CopyImage(number_background_, src_rc, image, dest_rc, false); 58 src_rc.Offset(number_background_.size().width() - stretch_point, 0); 59 dest_rc.Offset(image->size().width() - stretch_point, 0); 60 CopyImage(number_background_, src_rc, image, dest_rc, false); 61 src_rc = pp::Rect(stretch_point, 0, 1, number_background_.size().height()); 62 dest_rc = src_rc; 63 dest_rc.set_width(extra_width + 1); 64 CopyImage(number_background_, src_rc, image, dest_rc, true); 65 66 pp::Point origin(static_cast<int>(kPageNumberOriginX * device_scale_), 67 static_cast<int>(kPageNumberOriginY * device_scale_)); 68 for (size_t i = 0; i < strlen(buffer); ++i) { 69 int index = buffer[i] - '0'; 70 CopyImage( 71 number_images_[index], 72 pp::Rect(pp::Point(), number_images_[index].size()), 73 image, pp::Rect(origin, number_images_[index].size()), false); 74 origin += pp::Point( 75 number_images_[index].size().width() + 76 static_cast<int>(kPageNumberSeparator * device_scale_), 0); 77 } 78 } 79 80 } // namespace chrome_pdf 81 82
