1 /* Copyright (c) 2013 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.
7 * This file defines the <code>PPB_TrueTypeFont_Dev</code> interface. This
8 * interface exposes font table data for 'sfnt' fonts on the host system. These
9 * include TrueType and OpenType fonts.
12 [generate_thunk,thunk_include="ppapi/thunk/ppb_truetype_font_singleton_api.h"]
19 * The PP_TrueTypeFontFamily_Dev defines generic font families. These can be
20 * used to create generic fonts consistent with the user's browser settings.
23 enum PP_TrueTypeFontFamily_Dev {
25 * For a description of these default families, see the
26 * <a href="http://www.w3.org/TR/css3-fonts/#generic-font-families">
27 * 3.1.1 Generic font families</a> documentation.
29 PP_TRUETYPEFONTFAMILY_SERIF = 0,
30 PP_TRUETYPEFONTFAMILY_SANSSERIF = 1,
31 PP_TRUETYPEFONTFAMILY_CURSIVE = 2,
32 PP_TRUETYPEFONTFAMILY_FANTASY = 3,
33 PP_TRUETYPEFONTFAMILY_MONOSPACE = 4
37 * The PP_TrueTypeFontStyle_Dev enum defines font styles.
40 enum PP_TrueTypeFontStyle_Dev {
41 PP_TRUETYPEFONTSTYLE_NORMAL = 0,
42 PP_TRUETYPEFONTSTYLE_ITALIC = 1
46 * The PP_TrueTypeFontWeight_Dev enum defines font weights.
49 enum PP_TrueTypeFontWeight_Dev {
50 PP_TRUETYPEFONTWEIGHT_THIN = 100,
51 PP_TRUETYPEFONTWEIGHT_ULTRALIGHT = 200,
52 PP_TRUETYPEFONTWEIGHT_LIGHT = 300,
53 PP_TRUETYPEFONTWEIGHT_NORMAL = 400,
54 PP_TRUETYPEFONTWEIGHT_MEDIUM = 500,
55 PP_TRUETYPEFONTWEIGHT_SEMIBOLD = 600,
56 PP_TRUETYPEFONTWEIGHT_BOLD = 700,
57 PP_TRUETYPEFONTWEIGHT_ULTRABOLD = 800,
58 PP_TRUETYPEFONTWEIGHT_HEAVY = 900
62 * The PP_TrueTypeFontWidth_Dev enum defines font widths.
65 enum PP_TrueTypeFontWidth_Dev {
66 PP_TRUETYPEFONTWIDTH_ULTRACONDENSED = 0,
67 PP_TRUETYPEFONTWIDTH_EXTRACONDENSED = 1,
68 PP_TRUETYPEFONTWIDTH_CONDENSED = 2,
69 PP_TRUETYPEFONTWIDTH_SEMICONDENSED = 3,
70 PP_TRUETYPEFONTWIDTH_NORMAL = 4,
71 PP_TRUETYPEFONTWIDTH_SEMIEXPANDED = 5,
72 PP_TRUETYPEFONTWIDTH_EXPANDED = 6,
73 PP_TRUETYPEFONTWIDTH_EXTRAEXPANDED = 7,
74 PP_TRUETYPEFONTWIDTH_ULTRAEXPANDED = 8
78 * The PP_TrueTypeFontCharset enum defines font character sets.
81 enum PP_TrueTypeFontCharset_Dev {
82 PP_TRUETYPEFONTCHARSET_ANSI = 0,
83 PP_TRUETYPEFONTCHARSET_DEFAULT = 1,
84 PP_TRUETYPEFONTCHARSET_SYMBOL = 2,
85 PP_TRUETYPEFONTCHARSET_MAC = 77,
86 PP_TRUETYPEFONTCHARSET_SHIFTJIS = 128,
87 PP_TRUETYPEFONTCHARSET_HANGUL = 129,
88 PP_TRUETYPEFONTCHARSET_JOHAB = 130,
89 PP_TRUETYPEFONTCHARSET_GB2312 =134,
90 PP_TRUETYPEFONTCHARSET_CHINESEBIG5 = 136,
91 PP_TRUETYPEFONTCHARSET_GREEK = 161,
92 PP_TRUETYPEFONTCHARSET_TURKISH = 162,
93 PP_TRUETYPEFONTCHARSET_VIETNAMESE = 163,
94 PP_TRUETYPEFONTCHARSET_HEBREW = 177,
95 PP_TRUETYPEFONTCHARSET_ARABIC = 178,
96 PP_TRUETYPEFONTCHARSET_BALTIC = 186,
97 PP_TRUETYPEFONTCHARSET_RUSSIAN = 204,
98 PP_TRUETYPEFONTCHARSET_THAI = 222,
99 PP_TRUETYPEFONTCHARSET_EASTEUROPE = 238,
100 PP_TRUETYPEFONTCHARSET_OEM = 255
104 * The <code>PP_TrueTypeFontDesc</code> struct describes a TrueType font. It is
105 * passed to Create(), and returned by Describe().
108 struct PP_TrueTypeFontDesc_Dev {
110 * Font family name as a string. This can also be an undefined var, in which
111 * case the generic family will be obeyed. If the face is not available on
112 * the system, the browser will attempt to do font fallback or pick a default
117 /** This value specifies a generic font family. If a family name string is
118 * provided when creating a font, this is ignored. */
119 PP_TrueTypeFontFamily_Dev generic_family;
121 /** This value specifies the font style. */
122 PP_TrueTypeFontStyle_Dev style;
124 /** This value specifies the font weight. */
125 PP_TrueTypeFontWeight_Dev weight;
127 /** This value specifies the font width, for condensed or expanded fonts */
128 PP_TrueTypeFontWidth_Dev width;
130 /** This value specifies a character set. */
131 PP_TrueTypeFontCharset_Dev charset;
134 * Ensure that this struct is 40-bytes wide by padding the end. In some
135 * compilers, PP_Var is 8-byte aligned, so those compilers align this struct
136 * on 8-byte boundaries as well and pad it to 16 bytes even without this
137 * padding attribute. This padding makes its size consistent across
143 interface PPB_TrueTypeFont_Dev {
145 * Gets an array of TrueType font family names available on the host.
146 * These names can be used to create a font from a specific family.
148 * @param[in] instance A <code>PP_Instance</code> requesting the family names.
149 * @param[in] output A <code>PP_ArrayOutput</code> to hold the names.
150 * The output is an array of PP_Vars, each holding a family name.
151 * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
152 * completion of GetFontFamilies.
154 * @return If >= 0, the number of family names returned, otherwise an error
155 * code from <code>pp_errors.h</code>.
157 [singleton,api=PPB_TrueTypeFont_Singleton_API]
158 int32_t GetFontFamilies([in] PP_Instance instance,
159 [in] PP_ArrayOutput output,
160 [in] PP_CompletionCallback callback);
163 * Gets an array of TrueType font descriptors for a given font family. These
164 * descriptors can be used to create a font in that family and matching the
165 * descriptor attributes.
167 * @param[in] instance A <code>PP_Instance</code> requesting the font
169 * @param[in] family A <code>PP_Var</code> holding a string specifying the
171 * @param[in] output A <code>PP_ArrayOutput</code> to hold the descriptors.
172 * The output is an array of <code>PP_TrueTypeFontDesc</code> structs. Each
173 * desc contains a PP_Var for the family name which must be released.
174 * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
175 * completion of GetFontsInFamily.
177 * @return If >= 0, the number of font descriptors returned, otherwise an
178 * error code from <code>pp_errors.h</code>.
180 [singleton,api=PPB_TrueTypeFont_Singleton_API]
181 int32_t GetFontsInFamily([in] PP_Instance instance,
183 [in] PP_ArrayOutput output,
184 [in] PP_CompletionCallback callback);
187 * Creates a font resource matching the given font characteristics. The
188 * resource id will be non-zero on success, or zero on failure.
190 * @param[in] instance A <code>PP_Instance</code> to own the font.
191 * @param[in] desc A pointer to a <code>PP_TrueTypeFontDesc</code> describing
194 PP_Resource Create([in] PP_Instance instance,
195 [in] PP_TrueTypeFontDesc_Dev desc);
198 * Determines if the given resource is a TrueType font.
200 * @param[in] resource A <code>PP_Resource</code> corresponding to a resource.
202 * @return <code>PP_TRUE</code> if the resource is a
203 * <code>PPB_TrueTypeFont_Dev</code>, <code>PP_FALSE</code> otherwise.
205 PP_Bool IsTrueTypeFont([in] PP_Resource resource);
208 * Returns a description of the given font resource. This description may
209 * differ from the description passed to Create, reflecting the host's font
210 * matching and fallback algorithm.
212 * @param[in] font A <code>PP_Resource</code> corresponding to a font.
213 * @param[out] desc A pointer to a <code>PP_TrueTypeFontDesc</code> to hold
214 * the description. The internal 'family' PP_Var should be set to undefined,
215 * since this function overwrites the <code>PP_TrueTypeFontDesc</code>. After
216 * successful completion, the family will be set to a PP_Var with a single
217 * reference, which the caller must release after use.
218 * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
219 * completion of Describe.
221 * @return A return code from <code>pp_errors.h</code>. If an error code is
222 * returned, the <code>PP_TrueTypeFontDesc</code> will be unchanged.
224 int32_t Describe([in] PP_Resource font,
225 [out] PP_TrueTypeFontDesc_Dev desc,
226 [in] PP_CompletionCallback callback);
229 * Gets an array of identifying tags for each table in the font. These tags
230 * can be used to request specific tables using GetTable.
232 * @param[in] font A <code>PP_Resource</code> corresponding to a font.
233 * @param[in] output A <code>PP_ArrayOutput</code> to hold the tags.
234 * The output is an array of 4 byte integers, each representing a table tag.
235 * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
236 * completion of GetTableTags.
238 * @return If >= 0, the number of table tags returned, otherwise an error
239 * code from <code>pp_errors.h</code>.
241 int32_t GetTableTags([in] PP_Resource font,
242 [in] PP_ArrayOutput output,
243 [in] PP_CompletionCallback callback);
246 * Copies the given font table into client memory.
248 * @param[in] font A <code>PP_Resource</code> corresponding to a font.
249 * @param[in] table A 4 byte value indicating which table to copy.
250 * For example, 'glyf' will cause the outline table to be copied into the
251 * output array. A zero tag value will cause the entire font to be copied.
252 * @param[in] offset The offset into the font table. Passing an offset
253 * greater than or equal to the table size will succeed with 0 bytes copied.
254 * @param[in] max_data_length The maximum number of bytes to transfer from
255 * <code>offset</code>.
256 * @param[in] output A <code>PP_ArrayOutput</code> to hold the font data.
257 * The output is an array of bytes.
258 * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
259 * completion of GetTable.
261 * @return If >= 0, the table size in bytes, otherwise an error code from
262 * <code>pp_errors.h</code>.
264 int32_t GetTable([in] PP_Resource font,
267 [in] int32_t max_data_length,
268 [in] PP_ArrayOutput output,
269 [in] PP_CompletionCallback callback);