extensions/common/image_util.cc

   1 // Copyright 2014 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 "extensions/common/image_util.h"
   6
   7 #include <stdint.h>
   8 #include <vector>
   9
  10 #include "base/strings/string_number_conversions.h"
  11 #include "base/strings/stringprintf.h"
  12 #include "third_party/skia/include/core/SkColor.h"
  13
  14 namespace extensions {
  15 namespace image_util {
  16
  17 bool ParseCSSColorString(const std::string& color_string, SkColor* result) {
  18   std::string formatted_color;
  19   // Check the string for incorrect formatting.
  20   if (color_string.empty() || color_string[0] != '#')
  21     return false;
  22
  23   // Convert the string from #FFF format to #FFFFFF format.
  24   if (color_string.length() == 4) {
  25     for (size_t i = 1; i < 4; ++i) {
  26       formatted_color += color_string[i];
  27       formatted_color += color_string[i];
  28     }
  29   } else if (color_string.length() == 7) {
  30     formatted_color = color_string.substr(1, 6);
  31   } else {
  32     return false;
  33   }
  34
  35   // Convert the string to an integer and make sure it is in the correct value
  36   // range.
  37   std::vector<uint8_t> color_bytes;
  38   if (!base::HexStringToBytes(formatted_color, &color_bytes))
  39     return false;
  40
  41   *result = SkColorSetARGB(255, color_bytes[0], color_bytes[1], color_bytes[2]);
  42   return true;
  43 }
  44
  45 std::string GenerateCSSColorString(SkColor color) {
  46   return base::StringPrintf("#%02X%02X%02X", SkColorGetR(color),
  47                             SkColorGetG(color), SkColorGetB(color));
  48 }
  49
  50 }  // namespace image_util
  51 }  // namespace extensions