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| 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 |
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