src/ppapi/cpp/dev/font_dev.cc

   1 // Copyright (c) 2010 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 "ppapi/cpp/dev/font_dev.h"
   6
   7 #include <algorithm>
   8
   9 #include "ppapi/cpp/image_data.h"
  10 #include "ppapi/cpp/instance_handle.h"
  11 #include "ppapi/cpp/point.h"
  12 #include "ppapi/cpp/rect.h"
  13 #include "ppapi/cpp/module_impl.h"
  14
  15 namespace pp {
  16
  17 namespace {
  18
  19 template <> const char* interface_name<PPB_Font_Dev>() {
  20   return PPB_FONT_DEV_INTERFACE;
  21 }
  22
  23 }  // namespace
  24
  25 // FontDescription_Dev ---------------------------------------------------------
  26
  27 FontDescription_Dev::FontDescription_Dev() {
  28   pp_font_description_.face = face_.pp_var();
  29   set_family(PP_FONTFAMILY_DEFAULT);
  30   set_size(0);
  31   set_weight(PP_FONTWEIGHT_NORMAL);
  32   set_italic(false);
  33   set_small_caps(false);
  34   set_letter_spacing(0);
  35   set_word_spacing(0);
  36 }
  37
  38 FontDescription_Dev::FontDescription_Dev(const FontDescription_Dev& other) {
  39   set_face(other.face());
  40   set_family(other.family());
  41   set_size(other.size());
  42   set_weight(other.weight());
  43   set_italic(other.italic());
  44   set_small_caps(other.small_caps());
  45   set_letter_spacing(other.letter_spacing());
  46   set_word_spacing(other.word_spacing());
  47 }
  48
  49 FontDescription_Dev::~FontDescription_Dev() {
  50 }
  51
  52 FontDescription_Dev& FontDescription_Dev::operator=(
  53     const FontDescription_Dev& other) {
  54   pp_font_description_ = other.pp_font_description_;
  55
  56   // Be careful about the refcount of the string, the copy that operator= made
  57   // above didn't copy a ref.
  58   pp_font_description_.face = PP_MakeUndefined();
  59   set_face(other.face());
  60
  61   return *this;
  62 }
  63
  64 // TextRun_Dev -----------------------------------------------------------------
  65
  66 TextRun_Dev::TextRun_Dev() {
  67   pp_text_run_.text = text_.pp_var();
  68   pp_text_run_.rtl = PP_FALSE;
  69   pp_text_run_.override_direction = PP_FALSE;
  70 }
  71
  72 TextRun_Dev::TextRun_Dev(const std::string& text,
  73                          bool rtl,
  74                          bool override_direction)
  75     : text_(text) {
  76   pp_text_run_.text = text_.pp_var();
  77   pp_text_run_.rtl = PP_FromBool(rtl);
  78   pp_text_run_.override_direction = PP_FromBool(override_direction);
  79 }
  80
  81 TextRun_Dev::TextRun_Dev(const TextRun_Dev& other) : text_(other.text_) {
  82   pp_text_run_.text = text_.pp_var();
  83   pp_text_run_.rtl = other.pp_text_run_.rtl;
  84   pp_text_run_.override_direction = other.pp_text_run_.override_direction;
  85 }
  86
  87 TextRun_Dev::~TextRun_Dev() {
  88 }
  89
  90 TextRun_Dev& TextRun_Dev::operator=(const TextRun_Dev& other) {
  91   pp_text_run_ = other.pp_text_run_;
  92   text_ = other.text_;
  93   pp_text_run_.text = text_.pp_var();
  94   return *this;
  95 }
  96
  97 // Font ------------------------------------------------------------------------
  98
  99 Font_Dev::Font_Dev() : Resource() {
 100 }
 101
 102 Font_Dev::Font_Dev(PP_Resource resource) : Resource(resource) {
 103 }
 104
 105 Font_Dev::Font_Dev(const InstanceHandle& instance,
 106                    const FontDescription_Dev& description) {
 107   if (!has_interface<PPB_Font_Dev>())
 108     return;
 109   PassRefFromConstructor(get_interface<PPB_Font_Dev>()->Create(
 110       instance.pp_instance(), &description.pp_font_description()));
 111 }
 112
 113 Font_Dev::Font_Dev(const Font_Dev& other) : Resource(other) {
 114 }
 115
 116 Font_Dev& Font_Dev::operator=(const Font_Dev& other) {
 117   Resource::operator=(other);
 118   return *this;
 119 }
 120
 121 // static
 122 Var Font_Dev::GetFontFamilies(const InstanceHandle& instance) {
 123   if (!has_interface<PPB_Font_Dev>())
 124     return Var();
 125   return Var(PASS_REF, get_interface<PPB_Font_Dev>()->GetFontFamilies(
 126                  instance.pp_instance()));
 127 }
 128
 129 bool Font_Dev::Describe(FontDescription_Dev* description,
 130                         PP_FontMetrics_Dev* metrics) const {
 131   if (!has_interface<PPB_Font_Dev>())
 132     return false;
 133
 134   // Be careful with ownership of the |face| string. It will come back with
 135   // a ref of 1, which we want to assign to the |face_| member of the C++ class.
 136   if (!get_interface<PPB_Font_Dev>()->Describe(
 137       pp_resource(), &description->pp_font_description_, metrics))
 138     return false;
 139   description->face_ = Var(PASS_REF,
 140                            description->pp_font_description_.face);
 141
 142   return true;
 143 }
 144
 145 bool Font_Dev::DrawTextAt(ImageData* dest,
 146                           const TextRun_Dev& text,
 147                           const Point& position,
 148                           uint32_t color,
 149                           const Rect& clip,
 150                           bool image_data_is_opaque) const {
 151   if (!has_interface<PPB_Font_Dev>())
 152     return false;
 153   return PP_ToBool(get_interface<PPB_Font_Dev>()->DrawTextAt(
 154       pp_resource(),
 155       dest->pp_resource(),
 156       &text.pp_text_run(),
 157       &position.pp_point(),
 158       color,
 159       &clip.pp_rect(),
 160       PP_FromBool(image_data_is_opaque)));
 161 }
 162
 163 int32_t Font_Dev::MeasureText(const TextRun_Dev& text) const {
 164   if (!has_interface<PPB_Font_Dev>())
 165     return -1;
 166   return get_interface<PPB_Font_Dev>()->MeasureText(pp_resource(),
 167                                                     &text.pp_text_run());
 168 }
 169
 170 uint32_t Font_Dev::CharacterOffsetForPixel(const TextRun_Dev& text,
 171                                            int32_t pixel_position) const {
 172   if (!has_interface<PPB_Font_Dev>())
 173     return 0;
 174   return get_interface<PPB_Font_Dev>()->CharacterOffsetForPixel(
 175       pp_resource(), &text.pp_text_run(), pixel_position);
 176
 177 }
 178
 179 int32_t Font_Dev::PixelOffsetForCharacter(const TextRun_Dev& text,
 180                                           uint32_t char_offset) const {
 181   if (!has_interface<PPB_Font_Dev>())
 182     return 0;
 183   return get_interface<PPB_Font_Dev>()->PixelOffsetForCharacter(
 184       pp_resource(), &text.pp_text_run(), char_offset);
 185 }
 186
 187 bool Font_Dev::DrawSimpleText(ImageData* dest,
 188                               const std::string& text,
 189                               const Point& position,
 190                               uint32_t color,
 191                               bool image_data_is_opaque) const {
 192   return DrawTextAt(dest, TextRun_Dev(text), position, color,
 193                     Rect(dest->size()), image_data_is_opaque);
 194 }
 195
 196 int32_t Font_Dev::MeasureSimpleText(const std::string& text) const {
 197   return MeasureText(TextRun_Dev(text));
 198 }
 199
 200 }  // namespace pp