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 "chrome/browser/themes/browser_theme_pack.h"
6
7#include <limits>
8
9#include "base/memory/ref_counted_memory.h"
10#include "base/memory/scoped_ptr.h"
11#include "base/stl_util.h"
12#include "base/strings/string_number_conversions.h"
13#include "base/strings/string_util.h"
14#include "base/strings/utf_string_conversions.h"
15#include "base/threading/sequenced_worker_pool.h"
16#include "base/threading/thread_restrictions.h"
17#include "base/values.h"
18#include "chrome/browser/themes/theme_properties.h"
19#include "chrome/common/extensions/manifest_handlers/theme_handler.h"
20#include "content/public/browser/browser_thread.h"
21#include "extensions/common/id_util.h"
22#include "grit/theme_resources.h"
23#include "grit/ui_resources.h"
24#include "net/base/file_stream.h"
25#include "net/base/net_errors.h"
26#include "third_party/skia/include/core/SkCanvas.h"
27#include "ui/base/resource/data_pack.h"
28#include "ui/base/resource/resource_bundle.h"
29#include "ui/gfx/canvas.h"
30#include "ui/gfx/codec/png_codec.h"
31#include "ui/gfx/image/canvas_image_source.h"
32#include "ui/gfx/image/image.h"
33#include "ui/gfx/image/image_skia.h"
34#include "ui/gfx/image/image_skia_operations.h"
35#include "ui/gfx/screen.h"
36#include "ui/gfx/size_conversions.h"
37#include "ui/gfx/skia_util.h"
38
39using content::BrowserThread;
40using extensions::Extension;
41
42namespace {
43
44// Version number of the current theme pack. We just throw out and rebuild
45// theme packs that aren't int-equal to this. Increment this number if you
46// change default theme assets.
47const int kThemePackVersion = 32;
48
49// IDs that are in the DataPack won't clash with the positive integer
50// uint16. kHeaderID should always have the maximum value because we want the
51// "header" to be written last. That way we can detect whether the pack was
52// successfully written and ignore and regenerate if it was only partially
53// written (i.e. chrome crashed on a different thread while writing the pack).
54const int kMaxID = 0x0000FFFF;  // Max unsigned 16-bit int.
55const int kHeaderID = kMaxID - 1;
56const int kTintsID = kMaxID - 2;
57const int kColorsID = kMaxID - 3;
58const int kDisplayPropertiesID = kMaxID - 4;
59const int kSourceImagesID = kMaxID - 5;
60const int kScaleFactorsID = kMaxID - 6;
61
62// The sum of kFrameBorderThickness and kNonClientRestoredExtraThickness from
63// OpaqueBrowserFrameView.
64const int kRestoredTabVerticalOffset = 15;
65
66// Persistent constants for the main images that we need. These have the same
67// names as their IDR_* counterparts but these values will always stay the
68// same.
69const int PRS_THEME_FRAME = 1;
70const int PRS_THEME_FRAME_INACTIVE = 2;
71const int PRS_THEME_FRAME_INCOGNITO = 3;
72const int PRS_THEME_FRAME_INCOGNITO_INACTIVE = 4;
73const int PRS_THEME_TOOLBAR = 5;
74const int PRS_THEME_TAB_BACKGROUND = 6;
75const int PRS_THEME_TAB_BACKGROUND_INCOGNITO = 7;
76const int PRS_THEME_TAB_BACKGROUND_V = 8;
77const int PRS_THEME_NTP_BACKGROUND = 9;
78const int PRS_THEME_FRAME_OVERLAY = 10;
79const int PRS_THEME_FRAME_OVERLAY_INACTIVE = 11;
80const int PRS_THEME_BUTTON_BACKGROUND = 12;
81const int PRS_THEME_NTP_ATTRIBUTION = 13;
82const int PRS_THEME_WINDOW_CONTROL_BACKGROUND = 14;
83
84struct PersistingImagesTable {
85  // A non-changing integer ID meant to be saved in theme packs. This ID must
86  // not change between versions of chrome.
87  int persistent_id;
88
89  // The IDR that depends on the whims of GRIT and therefore changes whenever
90  // someone adds a new resource.
91  int idr_id;
92
93  // String to check for when parsing theme manifests or NULL if this isn't
94  // supposed to be changeable by the user.
95  const char* key;
96};
97
98// IDR_* resource names change whenever new resources are added; use persistent
99// IDs when storing to a cached pack.
100PersistingImagesTable kPersistingImages[] = {
101  { PRS_THEME_FRAME, IDR_THEME_FRAME,
102    "theme_frame" },
103  { PRS_THEME_FRAME_INACTIVE, IDR_THEME_FRAME_INACTIVE,
104    "theme_frame_inactive" },
105  { PRS_THEME_FRAME_INCOGNITO, IDR_THEME_FRAME_INCOGNITO,
106    "theme_frame_incognito" },
107  { PRS_THEME_FRAME_INCOGNITO_INACTIVE, IDR_THEME_FRAME_INCOGNITO_INACTIVE,
108    "theme_frame_incognito_inactive" },
109  { PRS_THEME_TOOLBAR, IDR_THEME_TOOLBAR,
110    "theme_toolbar" },
111  { PRS_THEME_TAB_BACKGROUND, IDR_THEME_TAB_BACKGROUND,
112    "theme_tab_background" },
113  { PRS_THEME_TAB_BACKGROUND_INCOGNITO, IDR_THEME_TAB_BACKGROUND_INCOGNITO,
114    "theme_tab_background_incognito" },
115  { PRS_THEME_TAB_BACKGROUND_V, IDR_THEME_TAB_BACKGROUND_V,
116    "theme_tab_background_v"},
117  { PRS_THEME_NTP_BACKGROUND, IDR_THEME_NTP_BACKGROUND,
118    "theme_ntp_background" },
119  { PRS_THEME_FRAME_OVERLAY, IDR_THEME_FRAME_OVERLAY,
120    "theme_frame_overlay" },
121  { PRS_THEME_FRAME_OVERLAY_INACTIVE, IDR_THEME_FRAME_OVERLAY_INACTIVE,
122    "theme_frame_overlay_inactive" },
123  { PRS_THEME_BUTTON_BACKGROUND, IDR_THEME_BUTTON_BACKGROUND,
124    "theme_button_background" },
125  { PRS_THEME_NTP_ATTRIBUTION, IDR_THEME_NTP_ATTRIBUTION,
126    "theme_ntp_attribution" },
127  { PRS_THEME_WINDOW_CONTROL_BACKGROUND, IDR_THEME_WINDOW_CONTROL_BACKGROUND,
128    "theme_window_control_background"},
129
130  // The rest of these entries have no key because they can't be overridden
131  // from the json manifest.
132  { 15, IDR_BACK, NULL },
133  { 16, IDR_BACK_D, NULL },
134  { 17, IDR_BACK_H, NULL },
135  { 18, IDR_BACK_P, NULL },
136  { 19, IDR_FORWARD, NULL },
137  { 20, IDR_FORWARD_D, NULL },
138  { 21, IDR_FORWARD_H, NULL },
139  { 22, IDR_FORWARD_P, NULL },
140  { 23, IDR_HOME, NULL },
141  { 24, IDR_HOME_H, NULL },
142  { 25, IDR_HOME_P, NULL },
143  { 26, IDR_RELOAD, NULL },
144  { 27, IDR_RELOAD_H, NULL },
145  { 28, IDR_RELOAD_P, NULL },
146  { 29, IDR_STOP, NULL },
147  { 30, IDR_STOP_D, NULL },
148  { 31, IDR_STOP_H, NULL },
149  { 32, IDR_STOP_P, NULL },
150  { 33, IDR_BROWSER_ACTIONS_OVERFLOW, NULL },
151  { 34, IDR_BROWSER_ACTIONS_OVERFLOW_H, NULL },
152  { 35, IDR_BROWSER_ACTIONS_OVERFLOW_P, NULL },
153  { 36, IDR_TOOLS, NULL },
154  { 37, IDR_TOOLS_H, NULL },
155  { 38, IDR_TOOLS_P, NULL },
156  { 39, IDR_MENU_DROPARROW, NULL },
157  { 40, IDR_THROBBER, NULL },
158  { 41, IDR_THROBBER_WAITING, NULL },
159  { 42, IDR_THROBBER_LIGHT, NULL },
160  { 43, IDR_TOOLBAR_BEZEL_HOVER, NULL },
161  { 44, IDR_TOOLBAR_BEZEL_PRESSED, NULL },
162  { 45, IDR_TOOLS_BAR, NULL },
163};
164const size_t kPersistingImagesLength = arraysize(kPersistingImages);
165
166#if defined(OS_WIN) && defined(USE_AURA)
167// Persistent theme ids for Windows AURA.
168const int PRS_THEME_FRAME_WIN = 100;
169const int PRS_THEME_FRAME_INACTIVE_WIN = 101;
170const int PRS_THEME_FRAME_INCOGNITO_WIN = 102;
171const int PRS_THEME_FRAME_INCOGNITO_INACTIVE_WIN = 103;
172const int PRS_THEME_TOOLBAR_WIN = 104;
173const int PRS_THEME_TAB_BACKGROUND_WIN = 105;
174const int PRS_THEME_TAB_BACKGROUND_INCOGNITO_WIN = 106;
175
176// Persistent theme to resource id mapping for Windows AURA.
177PersistingImagesTable kPersistingImagesWinDesktopAura[] = {
178  { PRS_THEME_FRAME_WIN, IDR_THEME_FRAME_WIN,
179    "theme_frame" },
180  { PRS_THEME_FRAME_INACTIVE_WIN, IDR_THEME_FRAME_INACTIVE_WIN,
181    "theme_frame_inactive" },
182  { PRS_THEME_FRAME_INCOGNITO_WIN, IDR_THEME_FRAME_INCOGNITO_WIN,
183    "theme_frame_incognito" },
184  { PRS_THEME_FRAME_INCOGNITO_INACTIVE_WIN,
185    IDR_THEME_FRAME_INCOGNITO_INACTIVE_WIN,
186    "theme_frame_incognito_inactive" },
187  { PRS_THEME_TOOLBAR_WIN, IDR_THEME_TOOLBAR_WIN,
188    "theme_toolbar" },
189  { PRS_THEME_TAB_BACKGROUND_WIN, IDR_THEME_TAB_BACKGROUND_WIN,
190    "theme_tab_background" },
191  { PRS_THEME_TAB_BACKGROUND_INCOGNITO_WIN,
192    IDR_THEME_TAB_BACKGROUND_INCOGNITO_WIN,
193    "theme_tab_background_incognito" },
194};
195const size_t kPersistingImagesWinDesktopAuraLength =
196    arraysize(kPersistingImagesWinDesktopAura);
197#endif
198
199int GetPersistentIDByNameHelper(const std::string& key,
200                                const PersistingImagesTable* image_table,
201                                size_t image_table_size) {
202  for (size_t i = 0; i < image_table_size; ++i) {
203    if (image_table[i].key != NULL &&
204        base::strcasecmp(key.c_str(), image_table[i].key) == 0) {
205      return image_table[i].persistent_id;
206    }
207  }
208  return -1;
209}
210
211int GetPersistentIDByName(const std::string& key) {
212  return GetPersistentIDByNameHelper(key,
213                                     kPersistingImages,
214                                     kPersistingImagesLength);
215}
216
217int GetPersistentIDByIDR(int idr) {
218  static std::map<int,int>* lookup_table = new std::map<int,int>();
219  if (lookup_table->empty()) {
220    for (size_t i = 0; i < kPersistingImagesLength; ++i) {
221      int idr = kPersistingImages[i].idr_id;
222      int prs_id = kPersistingImages[i].persistent_id;
223      (*lookup_table)[idr] = prs_id;
224    }
225#if defined(OS_WIN) && defined(USE_AURA)
226    for (size_t i = 0; i < kPersistingImagesWinDesktopAuraLength; ++i) {
227      int idr = kPersistingImagesWinDesktopAura[i].idr_id;
228      int prs_id = kPersistingImagesWinDesktopAura[i].persistent_id;
229      (*lookup_table)[idr] = prs_id;
230    }
231#endif
232  }
233  std::map<int,int>::iterator it = lookup_table->find(idr);
234  return (it == lookup_table->end()) ? -1 : it->second;
235}
236
237// Returns true if the scales in |input| match those in |expected|.
238// The order must match as the index is used in determining the raw id.
239bool InputScalesValid(const base::StringPiece& input,
240                      const std::vector<ui::ScaleFactor>& expected) {
241  size_t scales_size = static_cast<size_t>(input.size() / sizeof(float));
242  if (scales_size != expected.size())
243    return false;
244  scoped_ptr<float[]> scales(new float[scales_size]);
245  // Do a memcpy to avoid misaligned memory access.
246  memcpy(scales.get(), input.data(), input.size());
247  for (size_t index = 0; index < scales_size; ++index) {
248    if (scales[index] != ui::GetImageScale(expected[index]))
249      return false;
250  }
251  return true;
252}
253
254// Returns |scale_factors| as a string to be written to disk.
255std::string GetScaleFactorsAsString(
256    const std::vector<ui::ScaleFactor>& scale_factors) {
257  scoped_ptr<float[]> scales(new float[scale_factors.size()]);
258  for (size_t i = 0; i < scale_factors.size(); ++i)
259    scales[i] = ui::GetImageScale(scale_factors[i]);
260  std::string out_string = std::string(
261      reinterpret_cast<const char*>(scales.get()),
262      scale_factors.size() * sizeof(float));
263  return out_string;
264}
265
266struct StringToIntTable {
267  const char* key;
268  ThemeProperties::OverwritableByUserThemeProperty id;
269};
270
271// Strings used by themes to identify tints in the JSON.
272StringToIntTable kTintTable[] = {
273  { "buttons", ThemeProperties::TINT_BUTTONS },
274  { "frame", ThemeProperties::TINT_FRAME },
275  { "frame_inactive", ThemeProperties::TINT_FRAME_INACTIVE },
276  { "frame_incognito", ThemeProperties::TINT_FRAME_INCOGNITO },
277  { "frame_incognito_inactive",
278    ThemeProperties::TINT_FRAME_INCOGNITO_INACTIVE },
279  { "background_tab", ThemeProperties::TINT_BACKGROUND_TAB },
280};
281const size_t kTintTableLength = arraysize(kTintTable);
282
283// Strings used by themes to identify colors in the JSON.
284StringToIntTable kColorTable[] = {
285  { "frame", ThemeProperties::COLOR_FRAME },
286  { "frame_inactive", ThemeProperties::COLOR_FRAME_INACTIVE },
287  { "frame_incognito", ThemeProperties::COLOR_FRAME_INCOGNITO },
288  { "frame_incognito_inactive",
289    ThemeProperties::COLOR_FRAME_INCOGNITO_INACTIVE },
290  { "toolbar", ThemeProperties::COLOR_TOOLBAR },
291  { "tab_text", ThemeProperties::COLOR_TAB_TEXT },
292  { "tab_background_text", ThemeProperties::COLOR_BACKGROUND_TAB_TEXT },
293  { "bookmark_text", ThemeProperties::COLOR_BOOKMARK_TEXT },
294  { "ntp_background", ThemeProperties::COLOR_NTP_BACKGROUND },
295  { "ntp_text", ThemeProperties::COLOR_NTP_TEXT },
296  { "ntp_link", ThemeProperties::COLOR_NTP_LINK },
297  { "ntp_link_underline", ThemeProperties::COLOR_NTP_LINK_UNDERLINE },
298  { "ntp_header", ThemeProperties::COLOR_NTP_HEADER },
299  { "ntp_section", ThemeProperties::COLOR_NTP_SECTION },
300  { "ntp_section_text", ThemeProperties::COLOR_NTP_SECTION_TEXT },
301  { "ntp_section_link", ThemeProperties::COLOR_NTP_SECTION_LINK },
302  { "ntp_section_link_underline",
303    ThemeProperties::COLOR_NTP_SECTION_LINK_UNDERLINE },
304  { "button_background", ThemeProperties::COLOR_BUTTON_BACKGROUND },
305};
306const size_t kColorTableLength = arraysize(kColorTable);
307
308// Strings used by themes to identify display properties keys in JSON.
309StringToIntTable kDisplayProperties[] = {
310  { "ntp_background_alignment",
311    ThemeProperties::NTP_BACKGROUND_ALIGNMENT },
312  { "ntp_background_repeat", ThemeProperties::NTP_BACKGROUND_TILING },
313  { "ntp_logo_alternate", ThemeProperties::NTP_LOGO_ALTERNATE },
314};
315const size_t kDisplayPropertiesSize = arraysize(kDisplayProperties);
316
317int GetIntForString(const std::string& key,
318                    StringToIntTable* table,
319                    size_t table_length) {
320  for (size_t i = 0; i < table_length; ++i) {
321    if (base::strcasecmp(key.c_str(), table[i].key) == 0) {
322      return table[i].id;
323    }
324  }
325
326  return -1;
327}
328
329struct IntToIntTable {
330  int key;
331  int value;
332};
333
334// Mapping used in CreateFrameImages() to associate frame images with the
335// tint ID that should maybe be applied to it.
336IntToIntTable kFrameTintMap[] = {
337  { PRS_THEME_FRAME, ThemeProperties::TINT_FRAME },
338  { PRS_THEME_FRAME_INACTIVE, ThemeProperties::TINT_FRAME_INACTIVE },
339  { PRS_THEME_FRAME_OVERLAY, ThemeProperties::TINT_FRAME },
340  { PRS_THEME_FRAME_OVERLAY_INACTIVE,
341    ThemeProperties::TINT_FRAME_INACTIVE },
342  { PRS_THEME_FRAME_INCOGNITO, ThemeProperties::TINT_FRAME_INCOGNITO },
343  { PRS_THEME_FRAME_INCOGNITO_INACTIVE,
344    ThemeProperties::TINT_FRAME_INCOGNITO_INACTIVE },
345#if defined(OS_WIN) && defined(USE_AURA)
346  { PRS_THEME_FRAME_WIN, ThemeProperties::TINT_FRAME },
347  { PRS_THEME_FRAME_INACTIVE_WIN, ThemeProperties::TINT_FRAME_INACTIVE },
348  { PRS_THEME_FRAME_INCOGNITO_WIN, ThemeProperties::TINT_FRAME_INCOGNITO },
349  { PRS_THEME_FRAME_INCOGNITO_INACTIVE_WIN,
350    ThemeProperties::TINT_FRAME_INCOGNITO_INACTIVE },
351#endif
352};
353
354// Mapping used in GenerateTabBackgroundImages() to associate what frame image
355// goes with which tab background.
356IntToIntTable kTabBackgroundMap[] = {
357  { PRS_THEME_TAB_BACKGROUND, PRS_THEME_FRAME },
358  { PRS_THEME_TAB_BACKGROUND_INCOGNITO, PRS_THEME_FRAME_INCOGNITO },
359#if defined(OS_WIN) && defined(USE_AURA)
360  { PRS_THEME_TAB_BACKGROUND_WIN, PRS_THEME_FRAME_WIN },
361  { PRS_THEME_TAB_BACKGROUND_INCOGNITO_WIN, PRS_THEME_FRAME_INCOGNITO_WIN },
362#endif
363};
364
365struct CropEntry {
366  int prs_id;
367
368  // The maximum useful height of the image at |prs_id|.
369  int max_height;
370
371  // Whether cropping the image at |prs_id| should be skipped on OSes which
372  // have a frame border to the left and right of the web contents.
373  // This should be true for images which can be used to decorate the border to
374  // the left and the right of the web contents.
375  bool skip_if_frame_border;
376};
377
378// The images which should be cropped before being saved to the data pack. The
379// maximum heights are meant to be conservative as to give room for the UI to
380// change without the maximum heights having to be modified.
381// |kThemePackVersion| must be incremented if any of the maximum heights below
382// are modified.
383struct CropEntry kImagesToCrop[] = {
384  { PRS_THEME_FRAME, 120, true },
385  { PRS_THEME_FRAME_INACTIVE, 120, true },
386  { PRS_THEME_FRAME_INCOGNITO, 120, true },
387  { PRS_THEME_FRAME_INCOGNITO_INACTIVE, 120, true },
388  { PRS_THEME_FRAME_OVERLAY, 120, true },
389  { PRS_THEME_FRAME_OVERLAY_INACTIVE, 120, true },
390  { PRS_THEME_TOOLBAR, 200, false },
391  { PRS_THEME_BUTTON_BACKGROUND, 60, false },
392  { PRS_THEME_WINDOW_CONTROL_BACKGROUND, 50, false },
393#if defined(OS_WIN) && defined(USE_AURA)
394  { PRS_THEME_TOOLBAR_WIN, 200, false }
395#endif
396};
397
398
399// A list of images that don't need tinting or any other modification and can
400// be byte-copied directly into the finished DataPack. This should contain the
401// persistent IDs for all themeable image IDs that aren't in kFrameTintMap,
402// kTabBackgroundMap or kImagesToCrop.
403const int kPreloadIDs[] = {
404  PRS_THEME_NTP_BACKGROUND,
405  PRS_THEME_NTP_ATTRIBUTION,
406};
407
408// Returns true if this OS uses a browser frame which has a non zero width to
409// the left and the right of the web contents.
410bool HasFrameBorder() {
411#if defined(OS_CHROMEOS) || defined(OS_MACOSX)
412  return false;
413#else
414  return true;
415#endif
416}
417
418// Returns a piece of memory with the contents of the file |path|.
419base::RefCountedMemory* ReadFileData(const base::FilePath& path) {
420  if (!path.empty()) {
421    net::FileStream file(NULL);
422    int flags = base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ;
423    if (file.OpenSync(path, flags) == net::OK) {
424      int64 avail = file.Available();
425      if (avail > 0 && avail < INT_MAX) {
426        size_t size = static_cast<size_t>(avail);
427        std::vector<unsigned char> raw_data;
428        raw_data.resize(size);
429        char* data = reinterpret_cast<char*>(&(raw_data.front()));
430        if (file.ReadUntilComplete(data, size) == avail)
431          return base::RefCountedBytes::TakeVector(&raw_data);
432      }
433    }
434  }
435
436  return NULL;
437}
438
439// Shifts an image's HSL values. The caller is responsible for deleting
440// the returned image.
441gfx::Image CreateHSLShiftedImage(const gfx::Image& image,
442                                 const color_utils::HSL& hsl_shift) {
443  const gfx::ImageSkia* src_image = image.ToImageSkia();
444  return gfx::Image(gfx::ImageSkiaOperations::CreateHSLShiftedImage(
445      *src_image, hsl_shift));
446}
447
448// Computes a bitmap at one scale from a bitmap at a different scale.
449SkBitmap CreateLowQualityResizedBitmap(const SkBitmap& source_bitmap,
450                                       ui::ScaleFactor source_scale_factor,
451                                       ui::ScaleFactor desired_scale_factor) {
452  gfx::Size scaled_size = gfx::ToCeiledSize(
453      gfx::ScaleSize(gfx::Size(source_bitmap.width(),
454                               source_bitmap.height()),
455                     ui::GetImageScale(desired_scale_factor) /
456                     ui::GetImageScale(source_scale_factor)));
457  SkBitmap scaled_bitmap;
458  scaled_bitmap.setConfig(SkBitmap::kARGB_8888_Config,
459                          scaled_size.width(),
460                          scaled_size.height());
461  if (!scaled_bitmap.allocPixels())
462    SK_CRASH();
463  scaled_bitmap.eraseARGB(0, 0, 0, 0);
464  SkCanvas canvas(scaled_bitmap);
465  SkRect scaled_bounds = RectToSkRect(gfx::Rect(scaled_size));
466  // Note(oshima): The following scaling code doesn't work with
467  // a mask image.
468  canvas.drawBitmapRect(source_bitmap, NULL, scaled_bounds);
469  return scaled_bitmap;
470}
471
472// A ImageSkiaSource that scales 100P image to the target scale factor
473// if the ImageSkiaRep for the target scale factor isn't available.
474class ThemeImageSource: public gfx::ImageSkiaSource {
475 public:
476  explicit ThemeImageSource(const gfx::ImageSkia& source) : source_(source) {
477  }
478  virtual ~ThemeImageSource() {}
479
480  virtual gfx::ImageSkiaRep GetImageForScale(float scale) OVERRIDE {
481    if (source_.HasRepresentation(scale))
482      return source_.GetRepresentation(scale);
483    const gfx::ImageSkiaRep& rep_100p = source_.GetRepresentation(1.0f);
484    SkBitmap scaled_bitmap = CreateLowQualityResizedBitmap(
485        rep_100p.sk_bitmap(),
486        ui::SCALE_FACTOR_100P,
487        ui::GetSupportedScaleFactor(scale));
488    return gfx::ImageSkiaRep(scaled_bitmap, scale);
489  }
490
491 private:
492  const gfx::ImageSkia source_;
493
494  DISALLOW_COPY_AND_ASSIGN(ThemeImageSource);
495};
496
497// An ImageSkiaSource that delays decoding PNG data into bitmaps until
498// needed. Missing data for a scale factor is computed by scaling data for an
499// available scale factor. Computed bitmaps are stored for future look up.
500class ThemeImagePngSource : public gfx::ImageSkiaSource {
501 public:
502  typedef std::map<ui::ScaleFactor,
503                   scoped_refptr<base::RefCountedMemory> > PngMap;
504
505  explicit ThemeImagePngSource(const PngMap& png_map) : png_map_(png_map) {}
506
507  virtual ~ThemeImagePngSource() {}
508
509 private:
510  virtual gfx::ImageSkiaRep GetImageForScale(float scale) OVERRIDE {
511    ui::ScaleFactor scale_factor = ui::GetSupportedScaleFactor(scale);
512    // Look up the bitmap for |scale factor| in the bitmap map. If found
513    // return it.
514    BitmapMap::const_iterator exact_bitmap_it = bitmap_map_.find(scale_factor);
515    if (exact_bitmap_it != bitmap_map_.end())
516      return gfx::ImageSkiaRep(exact_bitmap_it->second, scale);
517
518    // Look up the raw PNG data for |scale_factor| in the png map. If found,
519    // decode it, store the result in the bitmap map and return it.
520    PngMap::const_iterator exact_png_it = png_map_.find(scale_factor);
521    if (exact_png_it != png_map_.end()) {
522      SkBitmap bitmap;
523      if (!gfx::PNGCodec::Decode(exact_png_it->second->front(),
524                                 exact_png_it->second->size(),
525                                 &bitmap)) {
526        NOTREACHED();
527        return gfx::ImageSkiaRep();
528      }
529      bitmap_map_[scale_factor] = bitmap;
530      return gfx::ImageSkiaRep(bitmap, scale);
531    }
532
533    // Find an available PNG for another scale factor. We want to use the
534    // highest available scale factor.
535    PngMap::const_iterator available_png_it = png_map_.end();
536    for (PngMap::const_iterator png_it = png_map_.begin();
537         png_it != png_map_.end(); ++png_it) {
538      if (available_png_it == png_map_.end() ||
539          ui::GetImageScale(png_it->first) >
540          ui::GetImageScale(available_png_it->first)) {
541        available_png_it = png_it;
542      }
543    }
544    if (available_png_it == png_map_.end())
545      return gfx::ImageSkiaRep();
546    ui::ScaleFactor available_scale_factor = available_png_it->first;
547
548    // Look up the bitmap for |available_scale_factor| in the bitmap map.
549    // If not found, decode the corresponging png data, store the result
550    // in the bitmap map.
551    BitmapMap::const_iterator available_bitmap_it =
552        bitmap_map_.find(available_scale_factor);
553    if (available_bitmap_it == bitmap_map_.end()) {
554      SkBitmap available_bitmap;
555      if (!gfx::PNGCodec::Decode(available_png_it->second->front(),
556                                 available_png_it->second->size(),
557                                 &available_bitmap)) {
558        NOTREACHED();
559        return gfx::ImageSkiaRep();
560      }
561      bitmap_map_[available_scale_factor] = available_bitmap;
562      available_bitmap_it = bitmap_map_.find(available_scale_factor);
563    }
564
565    // Scale the available bitmap to the desired scale factor, store the result
566    // in the bitmap map and return it.
567    SkBitmap scaled_bitmap = CreateLowQualityResizedBitmap(
568        available_bitmap_it->second,
569        available_scale_factor,
570        scale_factor);
571    bitmap_map_[scale_factor] = scaled_bitmap;
572    return gfx::ImageSkiaRep(scaled_bitmap, scale);
573  }
574
575  PngMap png_map_;
576
577  typedef std::map<ui::ScaleFactor, SkBitmap> BitmapMap;
578  BitmapMap bitmap_map_;
579
580  DISALLOW_COPY_AND_ASSIGN(ThemeImagePngSource);
581};
582
583class TabBackgroundImageSource: public gfx::CanvasImageSource {
584 public:
585  TabBackgroundImageSource(const gfx::ImageSkia& image_to_tint,
586                           const gfx::ImageSkia& overlay,
587                           const color_utils::HSL& hsl_shift,
588                           int vertical_offset)
589      : gfx::CanvasImageSource(image_to_tint.size(), false),
590        image_to_tint_(image_to_tint),
591        overlay_(overlay),
592        hsl_shift_(hsl_shift),
593        vertical_offset_(vertical_offset) {
594  }
595
596  virtual ~TabBackgroundImageSource() {
597  }
598
599  // Overridden from CanvasImageSource:
600  virtual void Draw(gfx::Canvas* canvas) OVERRIDE {
601    gfx::ImageSkia bg_tint =
602        gfx::ImageSkiaOperations::CreateHSLShiftedImage(image_to_tint_,
603            hsl_shift_);
604    canvas->TileImageInt(bg_tint, 0, vertical_offset_, 0, 0,
605        size().width(), size().height());
606
607    // If they've provided a custom image, overlay it.
608    if (!overlay_.isNull()) {
609      canvas->TileImageInt(overlay_, 0, 0, size().width(),
610                           overlay_.height());
611    }
612  }
613
614 private:
615  const gfx::ImageSkia image_to_tint_;
616  const gfx::ImageSkia overlay_;
617  const color_utils::HSL hsl_shift_;
618  const int vertical_offset_;
619
620  DISALLOW_COPY_AND_ASSIGN(TabBackgroundImageSource);
621};
622
623}  // namespace
624
625BrowserThemePack::~BrowserThemePack() {
626  if (!data_pack_.get()) {
627    delete header_;
628    delete [] tints_;
629    delete [] colors_;
630    delete [] display_properties_;
631    delete [] source_images_;
632  }
633}
634
635// static
636scoped_refptr<BrowserThemePack> BrowserThemePack::BuildFromExtension(
637    const Extension* extension) {
638  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
639  DCHECK(extension);
640  DCHECK(extension->is_theme());
641
642  scoped_refptr<BrowserThemePack> pack(new BrowserThemePack);
643  pack->BuildHeader(extension);
644  pack->BuildTintsFromJSON(extensions::ThemeInfo::GetTints(extension));
645  pack->BuildColorsFromJSON(extensions::ThemeInfo::GetColors(extension));
646  pack->BuildDisplayPropertiesFromJSON(
647      extensions::ThemeInfo::GetDisplayProperties(extension));
648
649  // Builds the images. (Image building is dependent on tints).
650  FilePathMap file_paths;
651  pack->ParseImageNamesFromJSON(
652      extensions::ThemeInfo::GetImages(extension),
653      extension->path(),
654      &file_paths);
655  pack->BuildSourceImagesArray(file_paths);
656
657  if (!pack->LoadRawBitmapsTo(file_paths, &pack->images_on_ui_thread_))
658    return NULL;
659
660  pack->CreateImages(&pack->images_on_ui_thread_);
661
662  // Make sure the |images_on_file_thread_| has bitmaps for supported
663  // scale factors before passing to FILE thread.
664  pack->images_on_file_thread_ = pack->images_on_ui_thread_;
665  for (ImageCache::iterator it = pack->images_on_file_thread_.begin();
666       it != pack->images_on_file_thread_.end(); ++it) {
667    gfx::ImageSkia* image_skia =
668        const_cast<gfx::ImageSkia*>(it->second.ToImageSkia());
669    image_skia->MakeThreadSafe();
670  }
671
672  // Set ThemeImageSource on |images_on_ui_thread_| to resample the source
673  // image if a caller of BrowserThemePack::GetImageNamed() requests an
674  // ImageSkiaRep for a scale factor not specified by the theme author.
675  // Callers of BrowserThemePack::GetImageNamed() to be able to retrieve
676  // ImageSkiaReps for all supported scale factors.
677  for (ImageCache::iterator it = pack->images_on_ui_thread_.begin();
678       it != pack->images_on_ui_thread_.end(); ++it) {
679    const gfx::ImageSkia source_image_skia = it->second.AsImageSkia();
680    ThemeImageSource* source = new ThemeImageSource(source_image_skia);
681    // image_skia takes ownership of source.
682    gfx::ImageSkia image_skia(source, source_image_skia.size());
683    it->second = gfx::Image(image_skia);
684  }
685
686  // Generate raw images (for new-tab-page attribution and background) for
687  // any missing scale from an available scale image.
688  for (size_t i = 0; i < arraysize(kPreloadIDs); ++i) {
689    pack->GenerateRawImageForAllSupportedScales(kPreloadIDs[i]);
690  }
691
692  // The BrowserThemePack is now in a consistent state.
693  return pack;
694}
695
696// static
697scoped_refptr<BrowserThemePack> BrowserThemePack::BuildFromDataPack(
698    const base::FilePath& path, const std::string& expected_id) {
699  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
700  // Allow IO on UI thread due to deep-seated theme design issues.
701  // (see http://crbug.com/80206)
702  base::ThreadRestrictions::ScopedAllowIO allow_io;
703  scoped_refptr<BrowserThemePack> pack(new BrowserThemePack);
704  // Scale factor parameter is moot as data pack has image resources for all
705  // supported scale factors.
706  pack->data_pack_.reset(
707      new ui::DataPack(ui::SCALE_FACTOR_NONE));
708
709  if (!pack->data_pack_->LoadFromPath(path)) {
710    LOG(ERROR) << "Failed to load theme data pack.";
711    return NULL;
712  }
713
714  base::StringPiece pointer;
715  if (!pack->data_pack_->GetStringPiece(kHeaderID, &pointer))
716    return NULL;
717  pack->header_ = reinterpret_cast<BrowserThemePackHeader*>(const_cast<char*>(
718      pointer.data()));
719
720  if (pack->header_->version != kThemePackVersion) {
721    DLOG(ERROR) << "BuildFromDataPack failure! Version mismatch!";
722    return NULL;
723  }
724  // TODO(erg): Check endianess once DataPack works on the other endian.
725  std::string theme_id(reinterpret_cast<char*>(pack->header_->theme_id),
726                       extensions::id_util::kIdSize);
727  std::string truncated_id =
728      expected_id.substr(0, extensions::id_util::kIdSize);
729  if (theme_id != truncated_id) {
730    DLOG(ERROR) << "Wrong id: " << theme_id << " vs " << expected_id;
731    return NULL;
732  }
733
734  if (!pack->data_pack_->GetStringPiece(kTintsID, &pointer))
735    return NULL;
736  pack->tints_ = reinterpret_cast<TintEntry*>(const_cast<char*>(
737      pointer.data()));
738
739  if (!pack->data_pack_->GetStringPiece(kColorsID, &pointer))
740    return NULL;
741  pack->colors_ =
742      reinterpret_cast<ColorPair*>(const_cast<char*>(pointer.data()));
743
744  if (!pack->data_pack_->GetStringPiece(kDisplayPropertiesID, &pointer))
745    return NULL;
746  pack->display_properties_ = reinterpret_cast<DisplayPropertyPair*>(
747      const_cast<char*>(pointer.data()));
748
749  if (!pack->data_pack_->GetStringPiece(kSourceImagesID, &pointer))
750    return NULL;
751  pack->source_images_ = reinterpret_cast<int*>(
752      const_cast<char*>(pointer.data()));
753
754  if (!pack->data_pack_->GetStringPiece(kScaleFactorsID, &pointer))
755    return NULL;
756
757  if (!InputScalesValid(pointer, pack->scale_factors_)) {
758    DLOG(ERROR) << "BuildFromDataPack failure! The pack scale factors differ "
759                << "from those supported by platform.";
760  }
761  return pack;
762}
763
764// static
765void BrowserThemePack::GetThemeableImageIDRs(std::set<int>* result) {
766  if (!result)
767    return;
768
769  result->clear();
770  for (size_t i = 0; i < kPersistingImagesLength; ++i)
771    result->insert(kPersistingImages[i].idr_id);
772
773#if defined(OS_WIN) && defined(USE_AURA)
774  for (size_t i = 0; i < kPersistingImagesWinDesktopAuraLength; ++i)
775    result->insert(kPersistingImagesWinDesktopAura[i].idr_id);
776#endif
777}
778
779bool BrowserThemePack::WriteToDisk(const base::FilePath& path) const {
780  // Add resources for each of the property arrays.
781  RawDataForWriting resources;
782  resources[kHeaderID] = base::StringPiece(
783      reinterpret_cast<const char*>(header_), sizeof(BrowserThemePackHeader));
784  resources[kTintsID] = base::StringPiece(
785      reinterpret_cast<const char*>(tints_),
786      sizeof(TintEntry[kTintTableLength]));
787  resources[kColorsID] = base::StringPiece(
788      reinterpret_cast<const char*>(colors_),
789      sizeof(ColorPair[kColorTableLength]));
790  resources[kDisplayPropertiesID] = base::StringPiece(
791      reinterpret_cast<const char*>(display_properties_),
792      sizeof(DisplayPropertyPair[kDisplayPropertiesSize]));
793
794  int source_count = 1;
795  int* end = source_images_;
796  for (; *end != -1 ; end++)
797    source_count++;
798  resources[kSourceImagesID] = base::StringPiece(
799      reinterpret_cast<const char*>(source_images_),
800      source_count * sizeof(*source_images_));
801
802  // Store results of GetScaleFactorsAsString() in std::string as
803  // base::StringPiece does not copy data in constructor.
804  std::string scale_factors_string = GetScaleFactorsAsString(scale_factors_);
805  resources[kScaleFactorsID] = scale_factors_string;
806
807  AddRawImagesTo(image_memory_, &resources);
808
809  RawImages reencoded_images;
810  RepackImages(images_on_file_thread_, &reencoded_images);
811  AddRawImagesTo(reencoded_images, &resources);
812
813  return ui::DataPack::WritePack(path, resources, ui::DataPack::BINARY);
814}
815
816bool BrowserThemePack::GetTint(int id, color_utils::HSL* hsl) const {
817  if (tints_) {
818    for (size_t i = 0; i < kTintTableLength; ++i) {
819      if (tints_[i].id == id) {
820        hsl->h = tints_[i].h;
821        hsl->s = tints_[i].s;
822        hsl->l = tints_[i].l;
823        return true;
824      }
825    }
826  }
827
828  return false;
829}
830
831bool BrowserThemePack::GetColor(int id, SkColor* color) const {
832  if (colors_) {
833    for (size_t i = 0; i < kColorTableLength; ++i) {
834      if (colors_[i].id == id) {
835        *color = colors_[i].color;
836        return true;
837      }
838    }
839  }
840
841  return false;
842}
843
844bool BrowserThemePack::GetDisplayProperty(int id, int* result) const {
845  if (display_properties_) {
846    for (size_t i = 0; i < kDisplayPropertiesSize; ++i) {
847      if (display_properties_[i].id == id) {
848        *result = display_properties_[i].property;
849        return true;
850      }
851    }
852  }
853
854  return false;
855}
856
857gfx::Image BrowserThemePack::GetImageNamed(int idr_id) {
858  int prs_id = GetPersistentIDByIDR(idr_id);
859  if (prs_id == -1)
860    return gfx::Image();
861
862  // Check if the image is cached.
863  ImageCache::const_iterator image_iter = images_on_ui_thread_.find(prs_id);
864  if (image_iter != images_on_ui_thread_.end())
865    return image_iter->second;
866
867  ThemeImagePngSource::PngMap png_map;
868  for (size_t i = 0; i < scale_factors_.size(); ++i) {
869    scoped_refptr<base::RefCountedMemory> memory =
870        GetRawData(idr_id, scale_factors_[i]);
871    if (memory.get())
872      png_map[scale_factors_[i]] = memory;
873  }
874  if (!png_map.empty()) {
875    gfx::ImageSkia image_skia(new ThemeImagePngSource(png_map),
876                              ui::SCALE_FACTOR_100P);
877    // |image_skia| takes ownership of ThemeImagePngSource.
878    gfx::Image ret = gfx::Image(image_skia);
879    images_on_ui_thread_[prs_id] = ret;
880    return ret;
881  }
882
883  return gfx::Image();
884}
885
886base::RefCountedMemory* BrowserThemePack::GetRawData(
887    int idr_id,
888    ui::ScaleFactor scale_factor) const {
889  base::RefCountedMemory* memory = NULL;
890  int prs_id = GetPersistentIDByIDR(idr_id);
891  int raw_id = GetRawIDByPersistentID(prs_id, scale_factor);
892
893  if (raw_id != -1) {
894    if (data_pack_.get()) {
895      memory = data_pack_->GetStaticMemory(raw_id);
896    } else {
897      RawImages::const_iterator it = image_memory_.find(raw_id);
898      if (it != image_memory_.end()) {
899        memory = it->second.get();
900      }
901    }
902  }
903
904  return memory;
905}
906
907bool BrowserThemePack::HasCustomImage(int idr_id) const {
908  int prs_id = GetPersistentIDByIDR(idr_id);
909  if (prs_id == -1)
910    return false;
911
912  int* img = source_images_;
913  for (; *img != -1; ++img) {
914    if (*img == prs_id)
915      return true;
916  }
917
918  return false;
919}
920
921// private:
922
923BrowserThemePack::BrowserThemePack()
924    : CustomThemeSupplier(EXTENSION),
925      header_(NULL),
926      tints_(NULL),
927      colors_(NULL),
928      display_properties_(NULL),
929      source_images_(NULL) {
930  scale_factors_ = ui::GetSupportedScaleFactors();
931}
932
933void BrowserThemePack::BuildHeader(const Extension* extension) {
934  header_ = new BrowserThemePackHeader;
935  header_->version = kThemePackVersion;
936
937  // TODO(erg): Need to make this endian safe on other computers. Prerequisite
938  // is that ui::DataPack removes this same check.
939#if defined(__BYTE_ORDER)
940  // Linux check
941  COMPILE_ASSERT(__BYTE_ORDER == __LITTLE_ENDIAN,
942                 datapack_assumes_little_endian);
943#elif defined(__BIG_ENDIAN__)
944  // Mac check
945  #error DataPack assumes little endian
946#endif
947  header_->little_endian = 1;
948
949  const std::string& id = extension->id();
950  memcpy(header_->theme_id, id.c_str(), extensions::id_util::kIdSize);
951}
952
953void BrowserThemePack::BuildTintsFromJSON(
954    const base::DictionaryValue* tints_value) {
955  tints_ = new TintEntry[kTintTableLength];
956  for (size_t i = 0; i < kTintTableLength; ++i) {
957    tints_[i].id = -1;
958    tints_[i].h = -1;
959    tints_[i].s = -1;
960    tints_[i].l = -1;
961  }
962
963  if (!tints_value)
964    return;
965
966  // Parse the incoming data from |tints_value| into an intermediary structure.
967  std::map<int, color_utils::HSL> temp_tints;
968  for (DictionaryValue::Iterator iter(*tints_value); !iter.IsAtEnd();
969       iter.Advance()) {
970    const ListValue* tint_list;
971    if (iter.value().GetAsList(&tint_list) &&
972        (tint_list->GetSize() == 3)) {
973      color_utils::HSL hsl = { -1, -1, -1 };
974
975      if (tint_list->GetDouble(0, &hsl.h) &&
976          tint_list->GetDouble(1, &hsl.s) &&
977          tint_list->GetDouble(2, &hsl.l)) {
978        int id = GetIntForString(iter.key(), kTintTable, kTintTableLength);
979        if (id != -1) {
980          temp_tints[id] = hsl;
981        }
982      }
983    }
984  }
985
986  // Copy data from the intermediary data structure to the array.
987  size_t count = 0;
988  for (std::map<int, color_utils::HSL>::const_iterator it =
989           temp_tints.begin();
990       it != temp_tints.end() && count < kTintTableLength;
991       ++it, ++count) {
992    tints_[count].id = it->first;
993    tints_[count].h = it->second.h;
994    tints_[count].s = it->second.s;
995    tints_[count].l = it->second.l;
996  }
997}
998
999void BrowserThemePack::BuildColorsFromJSON(
1000    const base::DictionaryValue* colors_value) {
1001  colors_ = new ColorPair[kColorTableLength];
1002  for (size_t i = 0; i < kColorTableLength; ++i) {
1003    colors_[i].id = -1;
1004    colors_[i].color = SkColorSetRGB(0, 0, 0);
1005  }
1006
1007  std::map<int, SkColor> temp_colors;
1008  if (colors_value)
1009    ReadColorsFromJSON(colors_value, &temp_colors);
1010  GenerateMissingColors(&temp_colors);
1011
1012  // Copy data from the intermediary data structure to the array.
1013  size_t count = 0;
1014  for (std::map<int, SkColor>::const_iterator it = temp_colors.begin();
1015       it != temp_colors.end() && count < kColorTableLength; ++it, ++count) {
1016    colors_[count].id = it->first;
1017    colors_[count].color = it->second;
1018  }
1019}
1020
1021void BrowserThemePack::ReadColorsFromJSON(
1022    const base::DictionaryValue* colors_value,
1023    std::map<int, SkColor>* temp_colors) {
1024  // Parse the incoming data from |colors_value| into an intermediary structure.
1025  for (DictionaryValue::Iterator iter(*colors_value); !iter.IsAtEnd();
1026       iter.Advance()) {
1027    const ListValue* color_list;
1028    if (iter.value().GetAsList(&color_list) &&
1029        ((color_list->GetSize() == 3) || (color_list->GetSize() == 4))) {
1030      SkColor color = SK_ColorWHITE;
1031      int r, g, b;
1032      if (color_list->GetInteger(0, &r) &&
1033          color_list->GetInteger(1, &g) &&
1034          color_list->GetInteger(2, &b)) {
1035        if (color_list->GetSize() == 4) {
1036          double alpha;
1037          int alpha_int;
1038          if (color_list->GetDouble(3, &alpha)) {
1039            color = SkColorSetARGB(static_cast<int>(alpha * 255), r, g, b);
1040          } else if (color_list->GetInteger(3, &alpha_int) &&
1041                     (alpha_int == 0 || alpha_int == 1)) {
1042            color = SkColorSetARGB(alpha_int ? 255 : 0, r, g, b);
1043          } else {
1044            // Invalid entry for part 4.
1045            continue;
1046          }
1047        } else {
1048          color = SkColorSetRGB(r, g, b);
1049        }
1050
1051        int id = GetIntForString(iter.key(), kColorTable, kColorTableLength);
1052        if (id != -1) {
1053          (*temp_colors)[id] = color;
1054        }
1055      }
1056    }
1057  }
1058}
1059
1060void BrowserThemePack::GenerateMissingColors(
1061    std::map<int, SkColor>* colors) {
1062  // Generate link colors, if missing. (See GetColor()).
1063  if (!colors->count(ThemeProperties::COLOR_NTP_HEADER) &&
1064      colors->count(ThemeProperties::COLOR_NTP_SECTION)) {
1065    (*colors)[ThemeProperties::COLOR_NTP_HEADER] =
1066        (*colors)[ThemeProperties::COLOR_NTP_SECTION];
1067  }
1068
1069  if (!colors->count(ThemeProperties::COLOR_NTP_SECTION_LINK_UNDERLINE) &&
1070      colors->count(ThemeProperties::COLOR_NTP_SECTION_LINK)) {
1071    SkColor color_section_link =
1072        (*colors)[ThemeProperties::COLOR_NTP_SECTION_LINK];
1073    (*colors)[ThemeProperties::COLOR_NTP_SECTION_LINK_UNDERLINE] =
1074        SkColorSetA(color_section_link, SkColorGetA(color_section_link) / 3);
1075  }
1076
1077  if (!colors->count(ThemeProperties::COLOR_NTP_LINK_UNDERLINE) &&
1078      colors->count(ThemeProperties::COLOR_NTP_LINK)) {
1079    SkColor color_link = (*colors)[ThemeProperties::COLOR_NTP_LINK];
1080    (*colors)[ThemeProperties::COLOR_NTP_LINK_UNDERLINE] =
1081        SkColorSetA(color_link, SkColorGetA(color_link) / 3);
1082  }
1083
1084  // Generate frame colors, if missing. (See GenerateFrameColors()).
1085  SkColor frame;
1086  std::map<int, SkColor>::const_iterator it =
1087      colors->find(ThemeProperties::COLOR_FRAME);
1088  if (it != colors->end()) {
1089    frame = it->second;
1090  } else {
1091    frame = ThemeProperties::GetDefaultColor(
1092        ThemeProperties::COLOR_FRAME);
1093  }
1094
1095  if (!colors->count(ThemeProperties::COLOR_FRAME)) {
1096    (*colors)[ThemeProperties::COLOR_FRAME] =
1097        HSLShift(frame, GetTintInternal(ThemeProperties::TINT_FRAME));
1098  }
1099  if (!colors->count(ThemeProperties::COLOR_FRAME_INACTIVE)) {
1100    (*colors)[ThemeProperties::COLOR_FRAME_INACTIVE] =
1101        HSLShift(frame, GetTintInternal(
1102            ThemeProperties::TINT_FRAME_INACTIVE));
1103  }
1104  if (!colors->count(ThemeProperties::COLOR_FRAME_INCOGNITO)) {
1105    (*colors)[ThemeProperties::COLOR_FRAME_INCOGNITO] =
1106        HSLShift(frame, GetTintInternal(
1107            ThemeProperties::TINT_FRAME_INCOGNITO));
1108  }
1109  if (!colors->count(ThemeProperties::COLOR_FRAME_INCOGNITO_INACTIVE)) {
1110    (*colors)[ThemeProperties::COLOR_FRAME_INCOGNITO_INACTIVE] =
1111        HSLShift(frame, GetTintInternal(
1112            ThemeProperties::TINT_FRAME_INCOGNITO_INACTIVE));
1113  }
1114}
1115
1116void BrowserThemePack::BuildDisplayPropertiesFromJSON(
1117    const base::DictionaryValue* display_properties_value) {
1118  display_properties_ = new DisplayPropertyPair[kDisplayPropertiesSize];
1119  for (size_t i = 0; i < kDisplayPropertiesSize; ++i) {
1120    display_properties_[i].id = -1;
1121    display_properties_[i].property = 0;
1122  }
1123
1124  if (!display_properties_value)
1125    return;
1126
1127  std::map<int, int> temp_properties;
1128  for (DictionaryValue::Iterator iter(*display_properties_value);
1129       !iter.IsAtEnd(); iter.Advance()) {
1130    int property_id = GetIntForString(iter.key(), kDisplayProperties,
1131                                      kDisplayPropertiesSize);
1132    switch (property_id) {
1133      case ThemeProperties::NTP_BACKGROUND_ALIGNMENT: {
1134        std::string val;
1135        if (iter.value().GetAsString(&val)) {
1136          temp_properties[ThemeProperties::NTP_BACKGROUND_ALIGNMENT] =
1137              ThemeProperties::StringToAlignment(val);
1138        }
1139        break;
1140      }
1141      case ThemeProperties::NTP_BACKGROUND_TILING: {
1142        std::string val;
1143        if (iter.value().GetAsString(&val)) {
1144          temp_properties[ThemeProperties::NTP_BACKGROUND_TILING] =
1145              ThemeProperties::StringToTiling(val);
1146        }
1147        break;
1148      }
1149      case ThemeProperties::NTP_LOGO_ALTERNATE: {
1150        int val = 0;
1151        if (iter.value().GetAsInteger(&val))
1152          temp_properties[ThemeProperties::NTP_LOGO_ALTERNATE] = val;
1153        break;
1154      }
1155    }
1156  }
1157
1158  // Copy data from the intermediary data structure to the array.
1159  size_t count = 0;
1160  for (std::map<int, int>::const_iterator it = temp_properties.begin();
1161       it != temp_properties.end() && count < kDisplayPropertiesSize;
1162       ++it, ++count) {
1163    display_properties_[count].id = it->first;
1164    display_properties_[count].property = it->second;
1165  }
1166}
1167
1168void BrowserThemePack::ParseImageNamesFromJSON(
1169    const base::DictionaryValue* images_value,
1170    const base::FilePath& images_path,
1171    FilePathMap* file_paths) const {
1172  if (!images_value)
1173    return;
1174
1175  for (DictionaryValue::Iterator iter(*images_value); !iter.IsAtEnd();
1176       iter.Advance()) {
1177    if (iter.value().IsType(Value::TYPE_DICTIONARY)) {
1178      const DictionaryValue* inner_value = NULL;
1179      if (iter.value().GetAsDictionary(&inner_value)) {
1180        for (DictionaryValue::Iterator inner_iter(*inner_value);
1181             !inner_iter.IsAtEnd();
1182             inner_iter.Advance()) {
1183          std::string name;
1184          ui::ScaleFactor scale_factor = ui::SCALE_FACTOR_NONE;
1185          if (GetScaleFactorFromManifestKey(inner_iter.key(), &scale_factor) &&
1186              inner_iter.value().IsType(Value::TYPE_STRING) &&
1187              inner_iter.value().GetAsString(&name)) {
1188            AddFileAtScaleToMap(iter.key(),
1189                                scale_factor,
1190                                images_path.AppendASCII(name),
1191                                file_paths);
1192          }
1193        }
1194      }
1195    } else if (iter.value().IsType(Value::TYPE_STRING)) {
1196      std::string name;
1197      if (iter.value().GetAsString(&name)) {
1198        AddFileAtScaleToMap(iter.key(),
1199                            ui::SCALE_FACTOR_100P,
1200                            images_path.AppendASCII(name),
1201                            file_paths);
1202      }
1203    }
1204  }
1205}
1206
1207void BrowserThemePack::AddFileAtScaleToMap(const std::string& image_name,
1208                                           ui::ScaleFactor scale_factor,
1209                                           const base::FilePath& image_path,
1210                                           FilePathMap* file_paths) const {
1211  int id = GetPersistentIDByName(image_name);
1212  if (id != -1)
1213    (*file_paths)[id][scale_factor] = image_path;
1214#if defined(OS_WIN) && defined(USE_AURA)
1215  id = GetPersistentIDByNameHelper(image_name,
1216                                   kPersistingImagesWinDesktopAura,
1217                                   kPersistingImagesWinDesktopAuraLength);
1218  if (id != -1)
1219    (*file_paths)[id][scale_factor] = image_path;
1220#endif
1221}
1222
1223void BrowserThemePack::BuildSourceImagesArray(const FilePathMap& file_paths) {
1224  std::vector<int> ids;
1225  for (FilePathMap::const_iterator it = file_paths.begin();
1226       it != file_paths.end(); ++it) {
1227    ids.push_back(it->first);
1228  }
1229
1230  source_images_ = new int[ids.size() + 1];
1231  std::copy(ids.begin(), ids.end(), source_images_);
1232  source_images_[ids.size()] = -1;
1233}
1234
1235bool BrowserThemePack::LoadRawBitmapsTo(
1236    const FilePathMap& file_paths,
1237    ImageCache* image_cache) {
1238  // Themes should be loaded on the file thread, not the UI thread.
1239  // http://crbug.com/61838
1240  base::ThreadRestrictions::ScopedAllowIO allow_io;
1241
1242  for (FilePathMap::const_iterator it = file_paths.begin();
1243       it != file_paths.end(); ++it) {
1244    int prs_id = it->first;
1245    // Some images need to go directly into |image_memory_|. No modification is
1246    // necessary or desirable.
1247    bool is_copyable = false;
1248    for (size_t i = 0; i < arraysize(kPreloadIDs); ++i) {
1249      if (kPreloadIDs[i] == prs_id) {
1250        is_copyable = true;
1251        break;
1252      }
1253    }
1254    gfx::ImageSkia image_skia;
1255    for (int pass = 0; pass < 2; ++pass) {
1256      // Two passes: In the first pass, we process only scale factor
1257      // 100% and in the second pass all other scale factors. We
1258      // process scale factor 100% first because the first image added
1259      // in image_skia.AddRepresentation() determines the DIP size for
1260      // all representations.
1261      for (ScaleFactorToFileMap::const_iterator s2f = it->second.begin();
1262           s2f != it->second.end(); ++s2f) {
1263        ui::ScaleFactor scale_factor = s2f->first;
1264        if ((pass == 0 && scale_factor != ui::SCALE_FACTOR_100P) ||
1265            (pass == 1 && scale_factor == ui::SCALE_FACTOR_100P)) {
1266          continue;
1267        }
1268        scoped_refptr<base::RefCountedMemory> raw_data(
1269            ReadFileData(s2f->second));
1270        if (!raw_data.get() || !raw_data->size()) {
1271          LOG(ERROR) << "Could not load theme image"
1272                     << " prs_id=" << prs_id
1273                     << " scale_factor_enum=" << scale_factor
1274                     << " file=" << s2f->second.value()
1275                     << (raw_data.get() ? " (zero size)" : " (read error)");
1276          return false;
1277        }
1278        if (is_copyable) {
1279          int raw_id = GetRawIDByPersistentID(prs_id, scale_factor);
1280          image_memory_[raw_id] = raw_data;
1281        } else {
1282          SkBitmap bitmap;
1283          if (gfx::PNGCodec::Decode(raw_data->front(), raw_data->size(),
1284                                    &bitmap)) {
1285            image_skia.AddRepresentation(
1286                gfx::ImageSkiaRep(bitmap,
1287                                  ui::GetImageScale(scale_factor)));
1288          } else {
1289            NOTREACHED() << "Unable to decode theme image resource "
1290                         << it->first;
1291          }
1292        }
1293      }
1294    }
1295    if (!is_copyable && !image_skia.isNull())
1296      (*image_cache)[prs_id] = gfx::Image(image_skia);
1297  }
1298
1299  return true;
1300}
1301
1302void BrowserThemePack::CreateImages(ImageCache* images) const {
1303  CropImages(images);
1304  CreateFrameImages(images);
1305  CreateTintedButtons(GetTintInternal(ThemeProperties::TINT_BUTTONS), images);
1306  CreateTabBackgroundImages(images);
1307}
1308
1309void BrowserThemePack::CropImages(ImageCache* images) const {
1310  bool has_frame_border = HasFrameBorder();
1311  for (size_t i = 0; i < arraysize(kImagesToCrop); ++i) {
1312    if (has_frame_border && kImagesToCrop[i].skip_if_frame_border)
1313      continue;
1314
1315    int prs_id = kImagesToCrop[i].prs_id;
1316    ImageCache::iterator it = images->find(prs_id);
1317    if (it == images->end())
1318      continue;
1319
1320    int crop_height = kImagesToCrop[i].max_height;
1321    gfx::ImageSkia image_skia = it->second.AsImageSkia();
1322    (*images)[prs_id] = gfx::Image(gfx::ImageSkiaOperations::ExtractSubset(
1323        image_skia, gfx::Rect(0, 0, image_skia.width(), crop_height)));
1324  }
1325}
1326
1327void BrowserThemePack::CreateFrameImages(ImageCache* images) const {
1328  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
1329
1330  // Create all the output images in a separate cache and move them back into
1331  // the input images because there can be name collisions.
1332  ImageCache temp_output;
1333
1334  for (size_t i = 0; i < arraysize(kFrameTintMap); ++i) {
1335    int prs_id = kFrameTintMap[i].key;
1336    gfx::Image frame;
1337    // If there's no frame image provided for the specified id, then load
1338    // the default provided frame. If that's not provided, skip this whole
1339    // thing and just use the default images.
1340    int prs_base_id = 0;
1341
1342#if defined(OS_WIN) && defined(USE_AURA)
1343    if (prs_id == PRS_THEME_FRAME_INCOGNITO_INACTIVE_WIN) {
1344      prs_base_id = images->count(PRS_THEME_FRAME_INCOGNITO_WIN) ?
1345                    PRS_THEME_FRAME_INCOGNITO_WIN : PRS_THEME_FRAME_WIN;
1346    } else if (prs_id == PRS_THEME_FRAME_INACTIVE_WIN) {
1347      prs_base_id = PRS_THEME_FRAME_WIN;
1348    } else if (prs_id == PRS_THEME_FRAME_INCOGNITO_WIN &&
1349                !images->count(PRS_THEME_FRAME_INCOGNITO_WIN)) {
1350      prs_base_id = PRS_THEME_FRAME_WIN;
1351    }
1352#endif
1353    if (!prs_base_id) {
1354      if (prs_id == PRS_THEME_FRAME_INCOGNITO_INACTIVE) {
1355        prs_base_id = images->count(PRS_THEME_FRAME_INCOGNITO) ?
1356                      PRS_THEME_FRAME_INCOGNITO : PRS_THEME_FRAME;
1357      } else if (prs_id == PRS_THEME_FRAME_OVERLAY_INACTIVE) {
1358        prs_base_id = PRS_THEME_FRAME_OVERLAY;
1359      } else if (prs_id == PRS_THEME_FRAME_INACTIVE) {
1360        prs_base_id = PRS_THEME_FRAME;
1361      } else if (prs_id == PRS_THEME_FRAME_INCOGNITO &&
1362                 !images->count(PRS_THEME_FRAME_INCOGNITO)) {
1363        prs_base_id = PRS_THEME_FRAME;
1364      } else {
1365        prs_base_id = prs_id;
1366      }
1367    }
1368    if (images->count(prs_id)) {
1369      frame = (*images)[prs_id];
1370    } else if (prs_base_id != prs_id && images->count(prs_base_id)) {
1371      frame = (*images)[prs_base_id];
1372    } else if (prs_base_id == PRS_THEME_FRAME_OVERLAY) {
1373#if defined(OS_WIN) && defined(USE_AURA)
1374      if (images->count(PRS_THEME_FRAME_WIN)) {
1375#else
1376      if (images->count(PRS_THEME_FRAME)) {
1377#endif
1378        // If there is no theme overlay, don't tint the default frame,
1379        // because it will overwrite the custom frame image when we cache and
1380        // reload from disk.
1381        frame = gfx::Image();
1382      }
1383    } else {
1384      // If the theme doesn't specify an image, then apply the tint to
1385      // the default frame.
1386      frame = rb.GetImageNamed(IDR_THEME_FRAME);
1387#if defined(OS_WIN) && defined(USE_AURA)
1388      if (prs_id >= PRS_THEME_FRAME_WIN &&
1389          prs_id <= PRS_THEME_FRAME_INCOGNITO_INACTIVE_WIN) {
1390        frame = rb.GetImageNamed(IDR_THEME_FRAME_WIN);
1391      }
1392#endif
1393    }
1394    if (!frame.IsEmpty()) {
1395      temp_output[prs_id] = CreateHSLShiftedImage(
1396          frame, GetTintInternal(kFrameTintMap[i].value));
1397    }
1398  }
1399  MergeImageCaches(temp_output, images);
1400}
1401
1402void BrowserThemePack::CreateTintedButtons(
1403    const color_utils::HSL& button_tint,
1404    ImageCache* processed_images) const {
1405  if (button_tint.h != -1 || button_tint.s != -1 || button_tint.l != -1) {
1406    ResourceBundle& rb = ResourceBundle::GetSharedInstance();
1407    const std::set<int>& idr_ids =
1408        ThemeProperties::GetTintableToolbarButtons();
1409    for (std::set<int>::const_iterator it = idr_ids.begin();
1410         it != idr_ids.end(); ++it) {
1411      int prs_id = GetPersistentIDByIDR(*it);
1412      DCHECK(prs_id > 0);
1413
1414      // Fetch the image by IDR...
1415      gfx::Image& button = rb.GetImageNamed(*it);
1416
1417      // but save a version with the persistent ID.
1418      (*processed_images)[prs_id] =
1419          CreateHSLShiftedImage(button, button_tint);
1420    }
1421  }
1422}
1423
1424void BrowserThemePack::CreateTabBackgroundImages(ImageCache* images) const {
1425  ImageCache temp_output;
1426  for (size_t i = 0; i < arraysize(kTabBackgroundMap); ++i) {
1427    int prs_id = kTabBackgroundMap[i].key;
1428    int prs_base_id = kTabBackgroundMap[i].value;
1429
1430    // We only need to generate the background tab images if we were provided
1431    // with a PRS_THEME_FRAME.
1432    ImageCache::const_iterator it = images->find(prs_base_id);
1433    if (it != images->end()) {
1434      gfx::ImageSkia image_to_tint = (it->second).AsImageSkia();
1435      color_utils::HSL hsl_shift = GetTintInternal(
1436          ThemeProperties::TINT_BACKGROUND_TAB);
1437      int vertical_offset = images->count(prs_id)
1438                            ? kRestoredTabVerticalOffset : 0;
1439
1440      gfx::ImageSkia overlay;
1441      ImageCache::const_iterator overlay_it = images->find(prs_id);
1442      if (overlay_it != images->end())
1443        overlay = overlay_it->second.AsImageSkia();
1444
1445      gfx::ImageSkiaSource* source = new TabBackgroundImageSource(
1446          image_to_tint, overlay, hsl_shift, vertical_offset);
1447      // ImageSkia takes ownership of |source|.
1448      temp_output[prs_id] = gfx::Image(gfx::ImageSkia(source,
1449          image_to_tint.size()));
1450    }
1451  }
1452  MergeImageCaches(temp_output, images);
1453}
1454
1455void BrowserThemePack::RepackImages(const ImageCache& images,
1456                                    RawImages* reencoded_images) const {
1457  typedef std::vector<ui::ScaleFactor> ScaleFactors;
1458  for (ImageCache::const_iterator it = images.begin();
1459       it != images.end(); ++it) {
1460    gfx::ImageSkia image_skia = *it->second.ToImageSkia();
1461
1462    typedef std::vector<gfx::ImageSkiaRep> ImageSkiaReps;
1463    ImageSkiaReps image_reps = image_skia.image_reps();
1464    if (image_reps.empty()) {
1465      NOTREACHED() << "No image reps for resource " << it->first << ".";
1466    }
1467    for (ImageSkiaReps::iterator rep_it = image_reps.begin();
1468         rep_it != image_reps.end(); ++rep_it) {
1469      std::vector<unsigned char> bitmap_data;
1470      if (!gfx::PNGCodec::EncodeBGRASkBitmap(rep_it->sk_bitmap(), false,
1471                                             &bitmap_data)) {
1472        NOTREACHED() << "Image file for resource " << it->first
1473                     << " could not be encoded.";
1474      }
1475      int raw_id = GetRawIDByPersistentID(
1476          it->first,
1477          ui::GetSupportedScaleFactor(rep_it->scale()));
1478      (*reencoded_images)[raw_id] =
1479          base::RefCountedBytes::TakeVector(&bitmap_data);
1480    }
1481  }
1482}
1483
1484void BrowserThemePack::MergeImageCaches(
1485    const ImageCache& source, ImageCache* destination) const {
1486  for (ImageCache::const_iterator it = source.begin(); it != source.end();
1487       ++it) {
1488    (*destination)[it->first] = it->second;
1489  }
1490}
1491
1492void BrowserThemePack::AddRawImagesTo(const RawImages& images,
1493                                      RawDataForWriting* out) const {
1494  for (RawImages::const_iterator it = images.begin(); it != images.end();
1495       ++it) {
1496    (*out)[it->first] = base::StringPiece(
1497        reinterpret_cast<const char*>(it->second->front()), it->second->size());
1498  }
1499}
1500
1501color_utils::HSL BrowserThemePack::GetTintInternal(int id) const {
1502  if (tints_) {
1503    for (size_t i = 0; i < kTintTableLength; ++i) {
1504      if (tints_[i].id == id) {
1505        color_utils::HSL hsl;
1506        hsl.h = tints_[i].h;
1507        hsl.s = tints_[i].s;
1508        hsl.l = tints_[i].l;
1509        return hsl;
1510      }
1511    }
1512  }
1513
1514  return ThemeProperties::GetDefaultTint(id);
1515}
1516
1517int BrowserThemePack::GetRawIDByPersistentID(
1518    int prs_id,
1519    ui::ScaleFactor scale_factor) const {
1520  if (prs_id < 0)
1521    return -1;
1522
1523  for (size_t i = 0; i < scale_factors_.size(); ++i) {
1524    if (scale_factors_[i] == scale_factor)
1525      return static_cast<int>(kPersistingImagesLength * i) + prs_id;
1526  }
1527  return -1;
1528}
1529
1530bool BrowserThemePack::GetScaleFactorFromManifestKey(
1531    const std::string& key,
1532    ui::ScaleFactor* scale_factor) const {
1533  int percent = 0;
1534  if (base::StringToInt(key, &percent)) {
1535    float scale = static_cast<float>(percent) / 100.0f;
1536    for (size_t i = 0; i < scale_factors_.size(); ++i) {
1537      if (fabs(ui::GetImageScale(scale_factors_[i]) - scale) < 0.001) {
1538        *scale_factor = scale_factors_[i];
1539        return true;
1540      }
1541    }
1542  }
1543  return false;
1544}
1545
1546void BrowserThemePack::GenerateRawImageForAllSupportedScales(int prs_id) {
1547  // Compute (by scaling) bitmaps for |prs_id| for any scale factors
1548  // for which the theme author did not provide a bitmap. We compute
1549  // the bitmaps using the highest scale factor that theme author
1550  // provided.
1551  // Note: We use only supported scale factors. For example, if scale
1552  // factor 2x is supported by the current system, but 1.8x is not and
1553  // if the theme author did not provide an image for 2x but one for
1554  // 1.8x, we will not use the 1.8x image here. Here we will only use
1555  // images provided for scale factors supported by the current system.
1556
1557  // See if any image is missing. If not, we're done.
1558  bool image_missing = false;
1559  for (size_t i = 0; i < scale_factors_.size(); ++i) {
1560    int raw_id = GetRawIDByPersistentID(prs_id, scale_factors_[i]);
1561    if (image_memory_.find(raw_id) == image_memory_.end()) {
1562      image_missing = true;
1563      break;
1564    }
1565  }
1566  if (!image_missing)
1567    return;
1568
1569  // Find available scale factor with highest scale.
1570  ui::ScaleFactor available_scale_factor = ui::SCALE_FACTOR_NONE;
1571  for (size_t i = 0; i < scale_factors_.size(); ++i) {
1572    int raw_id = GetRawIDByPersistentID(prs_id, scale_factors_[i]);
1573    if ((available_scale_factor == ui::SCALE_FACTOR_NONE ||
1574         (ui::GetImageScale(scale_factors_[i]) >
1575          ui::GetImageScale(available_scale_factor))) &&
1576        image_memory_.find(raw_id) != image_memory_.end()) {
1577      available_scale_factor = scale_factors_[i];
1578    }
1579  }
1580  // If no scale factor is available, we're done.
1581  if (available_scale_factor == ui::SCALE_FACTOR_NONE)
1582    return;
1583
1584  // Get bitmap for the available scale factor.
1585  int available_raw_id = GetRawIDByPersistentID(prs_id, available_scale_factor);
1586  RawImages::const_iterator it = image_memory_.find(available_raw_id);
1587  SkBitmap available_bitmap;
1588  if (!gfx::PNGCodec::Decode(it->second->front(),
1589                             it->second->size(),
1590                             &available_bitmap)) {
1591    NOTREACHED() << "Unable to decode theme image for prs_id="
1592                 << prs_id << " for scale_factor=" << available_scale_factor;
1593    return;
1594  }
1595
1596  // Fill in all missing scale factors by scaling the available bitmap.
1597  for (size_t i = 0; i < scale_factors_.size(); ++i) {
1598    int scaled_raw_id = GetRawIDByPersistentID(prs_id, scale_factors_[i]);
1599    if (image_memory_.find(scaled_raw_id) != image_memory_.end())
1600      continue;
1601    SkBitmap scaled_bitmap =
1602        CreateLowQualityResizedBitmap(available_bitmap,
1603                                      available_scale_factor,
1604                                      scale_factors_[i]);
1605    std::vector<unsigned char> bitmap_data;
1606    if (!gfx::PNGCodec::EncodeBGRASkBitmap(scaled_bitmap,
1607                                           false,
1608                                           &bitmap_data)) {
1609      NOTREACHED() << "Unable to encode theme image for prs_id="
1610                   << prs_id << " for scale_factor=" << scale_factors_[i];
1611      break;
1612    }
1613    image_memory_[scaled_raw_id] =
1614        base::RefCountedBytes::TakeVector(&bitmap_data);
1615  }
1616}
1617