C++ (Cpp) ENFORCE2示例

示例#1

文件： SubtitleRenderer.cpp 项目： KevinJump/omxplayer

void SubtitleRenderer::
initialize_fonts(const std::string& font_path,
                 const std::string& italic_font_path,
                 unsigned int font_size) {
  ENFORCE(!FT_Init_FreeType(&ft_library_));
  ENFORCE2(!FT_New_Face(ft_library_, font_path.c_str(), 0, &ft_face_),
           "Unable to open font");
  ENFORCE2(!FT_New_Face(ft_library_, italic_font_path.c_str(), 0, &ft_face_italic_),
           "Unable to open italic font");
  ENFORCE(!FT_Set_Pixel_Sizes(ft_face_, 0, font_size));
  ENFORCE(!FT_Set_Pixel_Sizes(ft_face_italic_, 0, font_size));

  auto get_bbox = [this](char32_t cp) {
    auto glyph_index = FT_Get_Char_Index(ft_face_, cp);
    ENFORCE(!FT_Load_Glyph(ft_face_, glyph_index, FT_LOAD_NO_HINTING));
    FT_Glyph glyph;
    ENFORCE(!FT_Get_Glyph(ft_face_->glyph, &glyph));
    SCOPE_EXIT {FT_Done_Glyph(glyph);};
    FT_BBox bbox;
    FT_Glyph_Get_CBox(glyph, FT_GLYPH_BBOX_PIXELS, &bbox);
    return bbox;
  };

  constexpr float padding_factor = 0.05f;
  int y_min = get_bbox('g').yMin;
  int y_max = get_bbox('M').yMax;
  y_max += -y_min*0.7f;
  line_height_ = y_max - y_min;
  const int v_padding = line_height_*padding_factor + 0.5f;
  line_height_ += v_padding*2;
  box_offset_ = y_min-v_padding;
  box_h_padding_ = line_height_/5.0f + 0.5f;


  constexpr float border_thickness = 0.044f;
  ENFORCE(!FT_Stroker_New(ft_library_, &ft_stroker_));
  FT_Stroker_Set(ft_stroker_,
                 line_height_*border_thickness*64.0f,
                 FT_STROKER_LINECAP_ROUND,
                 FT_STROKER_LINEJOIN_ROUND,
                 0);
}

示例#2

文件： SubtitleRenderer.cpp 项目： JamesHarrison/omxplayer

void SubtitleRenderer::
initialize_fonts(const std::string& font_path, float font_size) {
  ENFORCE(!FT_Init_FreeType(&ft_library_));
  ENFORCE2(!FT_New_Face(ft_library_, font_path.c_str(), 0, &ft_face_),
           "Unable to open font");
  ENFORCE(!FT_Set_Pixel_Sizes(ft_face_, 0, font_size*screen_height_));

  auto get_bbox = [this](char32_t cp) {
    auto glyph_index = FT_Get_Char_Index(ft_face_, cp);
    ENFORCE(!FT_Load_Glyph(ft_face_, glyph_index, FT_LOAD_NO_HINTING));
    FT_Glyph glyph;
    ENFORCE(!FT_Get_Glyph(ft_face_->glyph, &glyph));
    SCOPE_EXIT {FT_Done_Glyph(glyph);};
    FT_BBox bbox;
    FT_Glyph_Get_CBox(glyph, FT_GLYPH_BBOX_PIXELS, &bbox);
    return bbox;
  };

  constexpr float padding_factor = 0.05f;
  int y_min = get_bbox('g').yMin;
  int y_max = get_bbox('M').yMax;
  y_max += -y_min*0.7f;
  line_height_ = y_max - y_min;
  const int v_padding = line_height_*padding_factor + 0.5f;
  line_height_ += v_padding*2;
  box_offset_ = y_min-v_padding;
  box_h_padding_ = line_height_/5.0f + 0.5f;


  constexpr float border_thickness = 0.045f;
  ENFORCE(!FT_Stroker_New(ft_library_, &ft_stroker_));
  FT_Stroker_Set(ft_stroker_,
                 line_height_*border_thickness*64.0f,
                 FT_STROKER_LINECAP_ROUND,
                 FT_STROKER_LINEJOIN_ROUND,
                 0);

  vgSeti(VG_FILTER_FORMAT_LINEAR, VG_TRUE);
  assert(!vgGetError());

  vgSeti(VG_IMAGE_QUALITY, VG_IMAGE_QUALITY_NONANTIALIASED);
  assert(!vgGetError());

  auto create_vg_font = [](VGFont& font) {
    font = vgCreateFont(128);
    ENFORCE(font);
  };

  create_vg_font(vg_font_);
  create_vg_font(vg_font_border_);
}