ui/gfx/ipc/gfx_param_traits.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 "ui/gfx/ipc/gfx_param_traits.h"
   6
   7 #include <string>
   8
   9 #include "third_party/skia/include/core/SkBitmap.h"
  10 #include "ui/gfx/rect.h"
  11 #include "ui/gfx/rect_f.h"
  12
  13 namespace {
  14
  15 struct SkBitmap_Data {
  16   // The color type for the bitmap (bits per pixel, etc).
  17   SkColorType fColorType;
  18
  19   // The alpha type for the bitmap (opaque, premul, unpremul).
  20   SkAlphaType fAlphaType;
  21
  22   // The width of the bitmap in pixels.
  23   uint32 fWidth;
  24
  25   // The height of the bitmap in pixels.
  26   uint32 fHeight;
  27
  28   void InitSkBitmapDataForTransfer(const SkBitmap& bitmap) {
  29     const SkImageInfo& info = bitmap.info();
  30     fColorType = info.fColorType;
  31     fAlphaType = info.fAlphaType;
  32     fWidth = info.fWidth;
  33     fHeight = info.fHeight;
  34   }
  35
  36   // Returns whether |bitmap| successfully initialized.
  37   bool InitSkBitmapFromData(SkBitmap* bitmap,
  38                             const char* pixels,
  39                             size_t pixels_size) const {
  40     if (!bitmap->tryAllocPixels(
  41             SkImageInfo::Make(fWidth, fHeight, fColorType, fAlphaType)))
  42       return false;
  43     if (pixels_size != bitmap->getSize())
  44       return false;
  45     memcpy(bitmap->getPixels(), pixels, pixels_size);
  46     return true;
  47   }
  48 };
  49
  50 }  // namespace
  51
  52 namespace IPC {
  53
  54 void ParamTraits<gfx::Point>::Write(Message* m, const gfx::Point& p) {
  55   m->WriteInt(p.x());
  56   m->WriteInt(p.y());
  57 }
  58
  59 bool ParamTraits<gfx::Point>::Read(const Message* m, PickleIterator* iter,
  60                                    gfx::Point* r) {
  61   int x, y;
  62   if (!m->ReadInt(iter, &x) ||
  63       !m->ReadInt(iter, &y))
  64     return false;
  65   r->set_x(x);
  66   r->set_y(y);
  67   return true;
  68 }
  69
  70 void ParamTraits<gfx::Point>::Log(const gfx::Point& p, std::string* l) {
  71   l->append(base::StringPrintf("(%d, %d)", p.x(), p.y()));
  72 }
  73
  74 void ParamTraits<gfx::PointF>::Write(Message* m, const gfx::PointF& v) {
  75   ParamTraits<float>::Write(m, v.x());
  76   ParamTraits<float>::Write(m, v.y());
  77 }
  78
  79 bool ParamTraits<gfx::PointF>::Read(const Message* m,
  80                                       PickleIterator* iter,
  81                                       gfx::PointF* r) {
  82   float x, y;
  83   if (!ParamTraits<float>::Read(m, iter, &x) ||
  84       !ParamTraits<float>::Read(m, iter, &y))
  85     return false;
  86   r->set_x(x);
  87   r->set_y(y);
  88   return true;
  89 }
  90
  91 void ParamTraits<gfx::PointF>::Log(const gfx::PointF& v, std::string* l) {
  92   l->append(base::StringPrintf("(%f, %f)", v.x(), v.y()));
  93 }
  94
  95 void ParamTraits<gfx::Size>::Write(Message* m, const gfx::Size& p) {
  96   DCHECK_GE(p.width(), 0);
  97   DCHECK_GE(p.height(), 0);
  98   int values[2] = { p.width(), p.height() };
  99   m->WriteBytes(&values, sizeof(int) * 2);
 100 }
 101
 102 bool ParamTraits<gfx::Size>::Read(const Message* m,
 103                                   PickleIterator* iter,
 104                                   gfx::Size* r) {
 105   const char* char_values;
 106   if (!m->ReadBytes(iter, &char_values, sizeof(int) * 2))
 107     return false;
 108   const int* values = reinterpret_cast<const int*>(char_values);
 109   if (values[0] < 0 || values[1] < 0)
 110     return false;
 111   r->set_width(values[0]);
 112   r->set_height(values[1]);
 113   return true;
 114 }
 115
 116 void ParamTraits<gfx::Size>::Log(const gfx::Size& p, std::string* l) {
 117   l->append(base::StringPrintf("(%d, %d)", p.width(), p.height()));
 118 }
 119
 120 void ParamTraits<gfx::SizeF>::Write(Message* m, const gfx::SizeF& p) {
 121   float values[2] = { p.width(), p.height() };
 122   m->WriteBytes(&values, sizeof(float) * 2);
 123 }
 124
 125 bool ParamTraits<gfx::SizeF>::Read(const Message* m,
 126                                    PickleIterator* iter,
 127                                    gfx::SizeF* r) {
 128   const char* char_values;
 129   if (!m->ReadBytes(iter, &char_values, sizeof(float) * 2))
 130     return false;
 131   const float* values = reinterpret_cast<const float*>(char_values);
 132   r->set_width(values[0]);
 133   r->set_height(values[1]);
 134   return true;
 135 }
 136
 137 void ParamTraits<gfx::SizeF>::Log(const gfx::SizeF& p, std::string* l) {
 138   l->append(base::StringPrintf("(%f, %f)", p.width(), p.height()));
 139 }
 140
 141 void ParamTraits<gfx::Vector2d>::Write(Message* m, const gfx::Vector2d& p) {
 142   int values[2] = { p.x(), p.y() };
 143   m->WriteBytes(&values, sizeof(int) * 2);
 144 }
 145
 146 bool ParamTraits<gfx::Vector2d>::Read(const Message* m,
 147                                       PickleIterator* iter,
 148                                       gfx::Vector2d* r) {
 149   const char* char_values;
 150   if (!m->ReadBytes(iter, &char_values, sizeof(int) * 2))
 151     return false;
 152   const int* values = reinterpret_cast<const int*>(char_values);
 153   r->set_x(values[0]);
 154   r->set_y(values[1]);
 155   return true;
 156 }
 157
 158 void ParamTraits<gfx::Vector2d>::Log(const gfx::Vector2d& v, std::string* l) {
 159   l->append(base::StringPrintf("(%d, %d)", v.x(), v.y()));
 160 }
 161
 162 void ParamTraits<gfx::Vector2dF>::Write(Message* m, const gfx::Vector2dF& p) {
 163   float values[2] = { p.x(), p.y() };
 164   m->WriteBytes(&values, sizeof(float) * 2);
 165 }
 166
 167 bool ParamTraits<gfx::Vector2dF>::Read(const Message* m,
 168                                       PickleIterator* iter,
 169                                       gfx::Vector2dF* r) {
 170   const char* char_values;
 171   if (!m->ReadBytes(iter, &char_values, sizeof(float) * 2))
 172     return false;
 173   const float* values = reinterpret_cast<const float*>(char_values);
 174   r->set_x(values[0]);
 175   r->set_y(values[1]);
 176   return true;
 177 }
 178
 179 void ParamTraits<gfx::Vector2dF>::Log(const gfx::Vector2dF& v, std::string* l) {
 180   l->append(base::StringPrintf("(%f, %f)", v.x(), v.y()));
 181 }
 182
 183 void ParamTraits<gfx::Rect>::Write(Message* m, const gfx::Rect& p) {
 184   int values[4] = { p.x(), p.y(), p.width(), p.height() };
 185   m->WriteBytes(&values, sizeof(int) * 4);
 186 }
 187
 188 bool ParamTraits<gfx::Rect>::Read(const Message* m,
 189                                   PickleIterator* iter,
 190                                   gfx::Rect* r) {
 191   const char* char_values;
 192   if (!m->ReadBytes(iter, &char_values, sizeof(int) * 4))
 193     return false;
 194   const int* values = reinterpret_cast<const int*>(char_values);
 195   if (values[2] < 0 || values[3] < 0)
 196     return false;
 197   r->SetRect(values[0], values[1], values[2], values[3]);
 198   return true;
 199 }
 200
 201 void ParamTraits<gfx::Rect>::Log(const gfx::Rect& p, std::string* l) {
 202   l->append(base::StringPrintf("(%d, %d, %d, %d)", p.x(), p.y(),
 203                                p.width(), p.height()));
 204 }
 205
 206 void ParamTraits<gfx::RectF>::Write(Message* m, const gfx::RectF& p) {
 207   float values[4] = { p.x(), p.y(), p.width(), p.height() };
 208   m->WriteBytes(&values, sizeof(float) * 4);
 209 }
 210
 211 bool ParamTraits<gfx::RectF>::Read(const Message* m,
 212                                    PickleIterator* iter,
 213                                    gfx::RectF* r) {
 214   const char* char_values;
 215   if (!m->ReadBytes(iter, &char_values, sizeof(float) * 4))
 216     return false;
 217   const float* values = reinterpret_cast<const float*>(char_values);
 218   r->SetRect(values[0], values[1], values[2], values[3]);
 219   return true;
 220 }
 221
 222 void ParamTraits<gfx::RectF>::Log(const gfx::RectF& p, std::string* l) {
 223   l->append(base::StringPrintf("(%f, %f, %f, %f)", p.x(), p.y(),
 224                                p.width(), p.height()));
 225 }
 226
 227 void ParamTraits<SkBitmap>::Write(Message* m, const SkBitmap& p) {
 228   size_t fixed_size = sizeof(SkBitmap_Data);
 229   SkBitmap_Data bmp_data;
 230   bmp_data.InitSkBitmapDataForTransfer(p);
 231   m->WriteData(reinterpret_cast<const char*>(&bmp_data),
 232                static_cast<int>(fixed_size));
 233   size_t pixel_size = p.getSize();
 234   SkAutoLockPixels p_lock(p);
 235   m->WriteData(reinterpret_cast<const char*>(p.getPixels()),
 236                static_cast<int>(pixel_size));
 237 }
 238
 239 bool ParamTraits<SkBitmap>::Read(const Message* m,
 240                                  PickleIterator* iter,
 241                                  SkBitmap* r) {
 242   const char* fixed_data;
 243   int fixed_data_size = 0;
 244   if (!m->ReadData(iter, &fixed_data, &fixed_data_size) ||
 245      (fixed_data_size <= 0)) {
 246     NOTREACHED();
 247     return false;
 248   }
 249   if (fixed_data_size != sizeof(SkBitmap_Data))
 250     return false;  // Message is malformed.
 251
 252   const char* variable_data;
 253   int variable_data_size = 0;
 254   if (!m->ReadData(iter, &variable_data, &variable_data_size) ||
 255      (variable_data_size < 0)) {
 256     NOTREACHED();
 257     return false;
 258   }
 259   const SkBitmap_Data* bmp_data =
 260       reinterpret_cast<const SkBitmap_Data*>(fixed_data);
 261   return bmp_data->InitSkBitmapFromData(r, variable_data, variable_data_size);
 262 }
 263
 264 void ParamTraits<SkBitmap>::Log(const SkBitmap& p, std::string* l) {
 265   l->append("<SkBitmap>");
 266 }
 267
 268 }  // namespace IPC