2 * Copyright (c) 2021 Samsung Electronics Co., Ltd.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include <dali/internal/text/text-abstraction/plugin/font-client-utils.h>
19 #include <dali/integration-api/debug.h>
20 #include <dali/internal/imaging/common/image-operations.h>
24 extern Dali::Integration::Log::Filter* gFontClientLogFilter;
26 namespace Dali::TextAbstraction::Internal
30 // http://www.freedesktop.org/software/fontconfig/fontconfig-user.html
32 // NONE -1 --> DEFAULT_FONT_WIDTH (NORMAL) will be used.
42 const int FONT_WIDTH_TYPE_TO_INT[] = {-1, 50, 63, 75, 87, 100, 113, 125, 150, 200};
43 const unsigned int NUM_FONT_WIDTH_TYPE = sizeof(FONT_WIDTH_TYPE_TO_INT) / sizeof(int);
45 // NONE -1 --> DEFAULT_FONT_WEIGHT (NORMAL) will be used.
47 // ULTRA_LIGHT, EXTRA_LIGHT 40
49 // DEMI_LIGHT, SEMI_LIGHT 55
53 // DEMI_BOLD, SEMI_BOLD 180
55 // ULTRA_BOLD, EXTRA_BOLD 205
56 // BLACK, HEAVY, EXTRA_BLACK 210
57 const int FONT_WEIGHT_TYPE_TO_INT[] = {-1, 0, 40, 50, 55, 75, 80, 100, 180, 200, 205, 210};
58 const unsigned int NUM_FONT_WEIGHT_TYPE = sizeof(FONT_WEIGHT_TYPE_TO_INT) / sizeof(int);
60 // NONE -1 --> DEFAULT_FONT_SLANT (NORMAL) will be used.
64 const int FONT_SLANT_TYPE_TO_INT[] = {-1, 0, 100, 110};
65 const unsigned int NUM_FONT_SLANT_TYPE = sizeof(FONT_SLANT_TYPE_TO_INT) / sizeof(int);
70 * @brief Returns the FontWidth's enum index for the given width value.
72 * @param[in] width The width value.
74 * @return The FontWidth's enum index.
76 const FontWidth::Type IntToWidthType(int width)
78 return static_cast<FontWidth::Type>(ValueToIndex(width, FONT_WIDTH_TYPE_TO_INT, NUM_FONT_WIDTH_TYPE - 1u));
82 * @brief Returns the FontWeight's enum index for the given weight value.
84 * @param[in] weight The weight value.
86 * @return The FontWeight's enum index.
88 const FontWeight::Type IntToWeightType(int weight)
90 return static_cast<FontWeight::Type>(ValueToIndex(weight, FONT_WEIGHT_TYPE_TO_INT, NUM_FONT_WEIGHT_TYPE - 1u));
94 * @brief Returns the FontSlant's enum index for the given slant value.
96 * @param[in] slant The slant value.
98 * @return The FontSlant's enum index.
100 const FontSlant::Type IntToSlantType(int slant)
102 return static_cast<FontSlant::Type>(ValueToIndex(slant, FONT_SLANT_TYPE_TO_INT, NUM_FONT_SLANT_TYPE - 1u));
105 const int DEFAULT_FONT_WIDTH(100);
106 const int DEFAULT_FONT_WEIGHT(80);
107 const int DEFAULT_FONT_SLANT(0);
109 const FontWidth::Type DefaultFontWidth()
111 return IntToWidthType(DEFAULT_FONT_WIDTH);
113 const FontWeight::Type DefaultFontWeight()
115 return IntToWeightType(DEFAULT_FONT_WEIGHT);
117 const FontSlant::Type DefaultFontSlant()
119 return IntToSlantType(DEFAULT_FONT_SLANT);
123 * @brief Copy the color bitmap given in @p srcBuffer to @p data.
125 * @param[out] data The bitmap data.
126 * @param[in] srcWidth The width of the bitmap.
127 * @param[in] srcHeight The height of the bitmap.
128 * @param[in] srcBuffer The buffer of the bitmap.
130 void ConvertBitmap(TextAbstraction::FontClient::GlyphBufferData& data, unsigned int srcWidth, unsigned int srcHeight, const unsigned char* const srcBuffer)
132 // Set the input dimensions.
133 const ImageDimensions inputDimensions(srcWidth, srcHeight);
135 // Set the output dimensions.
136 // If the output dimension is not given, the input dimension is set
137 // and won't be downscaling.
138 data.width = (data.width == 0) ? srcWidth : data.width;
139 data.height = (data.height == 0) ? srcHeight : data.height;
140 const ImageDimensions desiredDimensions(data.width, data.height);
142 // Creates the output buffer
143 const unsigned int bufferSize = data.width * data.height * 4u;
144 data.buffer = new unsigned char[bufferSize]; // @note The caller is responsible for deallocating the bitmap data using delete[].
146 if(inputDimensions == desiredDimensions)
148 // There isn't downscaling.
149 memcpy(data.buffer, srcBuffer, bufferSize);
153 Dali::Internal::Platform::LanczosSample4BPP(srcBuffer,
161 * @brief Copy the FreeType bitmap to the given buffer.
163 * @param[out] data The bitmap data.
164 * @param[in] srcBitmap The FreeType bitmap.
165 * @param[in] isShearRequired Whether the bitmap needs a shear transform (for software italics).
167 void ConvertBitmap(TextAbstraction::FontClient::GlyphBufferData& data, FT_Bitmap srcBitmap, bool isShearRequired)
169 if(srcBitmap.width * srcBitmap.rows > 0)
171 switch(srcBitmap.pixel_mode)
173 case FT_PIXEL_MODE_GRAY:
175 if(srcBitmap.pitch == static_cast<int>(srcBitmap.width))
177 uint8_t* pixelsIn = srcBitmap.buffer;
178 unsigned int width = srcBitmap.width;
179 unsigned height = srcBitmap.rows;
181 std::unique_ptr<uint8_t, void (*)(void*)> pixelsOutPtr(nullptr, free);
186 * Glyphs' bitmaps with no slant retrieved from FreeType:
196 * Expected glyphs' bitmaps with italic slant:
197 * ____________ ______
204 * ------------ ------
206 * Glyphs' bitmaps with software italic slant retrieved from FreeType:
216 * This difference in some bitmaps' width causes an overlap of some glyphs. This is the reason why a shear operation is done here instead of relying on the experimental FT_GlyphSlot_Oblique() implementation.
218 unsigned int widthOut = 0u;
219 unsigned int heightOut = 0u;
220 uint8_t* pixelsOut = nullptr;
222 Dali::Internal::Platform::HorizontalShear(pixelsIn,
226 -TextAbstraction::FontClient::DEFAULT_ITALIC_ANGLE,
233 pixelsIn = pixelsOut;
234 pixelsOutPtr.reset(pixelsOut);
237 const unsigned int bufferSize = width * height;
238 data.buffer = new unsigned char[bufferSize]; // @note The caller is responsible for deallocating the bitmap data using delete[].
240 data.height = height;
241 data.format = Pixel::L8; // Sets the pixel format.
242 memcpy(data.buffer, pixelsIn, bufferSize);
247 #ifdef FREETYPE_BITMAP_SUPPORT
248 case FT_PIXEL_MODE_BGRA:
250 if(srcBitmap.pitch == static_cast<int>(srcBitmap.width << 2u))
252 ConvertBitmap(data, srcBitmap.width, srcBitmap.rows, srcBitmap.buffer);
254 // Sets the pixel format.
255 data.format = Pixel::BGRA8888;
262 DALI_LOG_INFO(gFontClientLogFilter, Debug::General, "FontClient::Plugin::ConvertBitmap. FontClient Unable to create Bitmap of this PixelType\n");
269 FcPattern* CreateFontFamilyPattern(const FontDescription& fontDescription)
271 // create the cached font family lookup pattern
272 // a pattern holds a set of names, each name refers to a property of the font
273 FcPattern* fontFamilyPattern = FcPatternCreate(); // FcPatternCreate creates a new pattern that needs to be destroyed by calling FcPatternDestroy.
275 if(!fontFamilyPattern)
280 // add a property to the pattern for the font family
281 FcPatternAddString(fontFamilyPattern, FC_FAMILY, reinterpret_cast<const FcChar8*>(fontDescription.family.c_str()));
283 // add a property to the pattern for local setting.
284 const char* locale = setlocale(LC_MESSAGES, nullptr);
285 if(locale != nullptr)
287 FcPatternAddString(fontFamilyPattern, FC_LANG, reinterpret_cast<const FcChar8*>(locale));
290 int width = FONT_WIDTH_TYPE_TO_INT[fontDescription.width];
294 width = DEFAULT_FONT_WIDTH;
297 int weight = FONT_WEIGHT_TYPE_TO_INT[fontDescription.weight];
301 weight = DEFAULT_FONT_WEIGHT;
304 int slant = FONT_SLANT_TYPE_TO_INT[fontDescription.slant];
308 slant = DEFAULT_FONT_SLANT;
311 FcPatternAddInteger(fontFamilyPattern, FC_WIDTH, width);
312 FcPatternAddInteger(fontFamilyPattern, FC_WEIGHT, weight);
313 FcPatternAddInteger(fontFamilyPattern, FC_SLANT, slant);
315 // modify the config, with the mFontFamilyPatterm
316 FcConfigSubstitute(nullptr /* use default configure */, fontFamilyPattern, FcMatchPattern);
318 // provide default values for unspecified properties in the font pattern
319 // e.g. patterns without a specified style or weight are set to Medium
320 FcDefaultSubstitute(fontFamilyPattern);
322 return fontFamilyPattern;
325 FcCharSet* CreateCharacterSetFromDescription(const FontDescription& description)
327 FcCharSet* characterSet = nullptr;
329 FcPattern* pattern = CreateFontFamilyPattern(description); // Creates a new pattern that needs to be destroyed by calling FcPatternDestroy.
331 if(nullptr != pattern)
333 FcResult result = FcResultMatch;
334 FcPattern* match = FcFontMatch(nullptr, pattern, &result); // FcFontMatch creates a new pattern that needs to be destroyed by calling FcPatternDestroy.
336 FcPatternGetCharSet(match, FC_CHARSET, 0u, &characterSet);
338 // Destroys the created patterns.
339 FcPatternDestroy(match);
340 FcPatternDestroy(pattern);
346 } // namespace Dali::TextAbstraction::Internal