1 #ifndef __DALI_INTEGRATION_PLATFORM_ABSTRACTION_H__
2 #define __DALI_INTEGRATION_PLATFORM_ABSTRACTION_H__
5 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
22 #include <dali/integration-api/glyph-set.h>
23 #include <dali/integration-api/resource-cache.h>
24 #include <dali/integration-api/text-array.h>
33 class DynamicsFactory;
37 * PlatformAbstraction is an abstract interface, used by Dali to access platform specific services.
38 * A concrete implementation must be created for each platform, and provided when creating the
39 * Dali::Integration::Core object.
41 class PlatformAbstraction
45 virtual ~PlatformAbstraction() {}
50 * Get the monotonic time since an unspecified reference point.
51 * This is used by Dali to calculate time intervals during animations; the interval is
52 * recalculated when Dali is resumed with Dali::Integration::Core::Resume().
53 * Multi-threading note: this method may be called from either the main or rendering thread.
54 * @param[out] seconds The time in seconds since the reference point.
55 * @param[out] microSeconds The remainder in microseconds.
57 virtual void GetTimeMicroseconds(unsigned int& seconds, unsigned int& microSeconds) = 0;
60 * Tell the platform abstraction that Dali is ready to pause, such as when the
61 * application enters a background state.
62 * Allows background threads to pause their work until Resume() is called.
63 * This is a good time to release recreatable data such as memory caches
64 * to cooperate with other apps and reduce the chance of this one being
65 * force-killed in a low memory situation.
67 virtual void Suspend() {} ///!ToDo: Make pure virtual once dali-adaptor patch is in place = 0;
70 * Tell the platform abstraction that Dali is resuming from a pause, such as
71 * when it has transitioned from a background state to a foreground one.
72 * It is time to wake up sleeping background threads and recreate memory
73 * caches and other temporary data.
75 virtual void Resume() {} ///!ToDo: Make pure virtual once dali-adaptor patch is in place = 0;
80 * Determine the size of an image the resource loaders will provide when given the same
82 * This is a synchronous request.
83 * This function is used to determine the size of an image before it has loaded.
84 * @param[in] filename name of the image.
85 * @param[in] attributes The attributes used to load the image
86 * @param[out] closestSize Size of the image that will be loaded.
88 virtual void GetClosestImageSize( const std::string& filename,
89 const ImageAttributes& attributes,
90 Vector2& closestSize ) = 0;
93 * Determine the size of an image the resource loaders will provide when given the same
95 * This is a synchronous request.
96 * This function is used to determine the size of an image before it has loaded.
97 * @param[in] resourceBuffer A pointer to an encoded image buffer
98 * @param[in] attributes The attributes used to load the image
99 * @param[out] closestSize Size of the image that will be loaded.
101 virtual void GetClosestImageSize( ResourcePointer resourceBuffer,
102 const ImageAttributes& attributes,
103 Vector2& closestSize ) = 0;
106 * Request a resource from the native filesystem. This is an asynchronous request.
107 * After this method returns, FillResourceCache() will be called to retrieve the result(s) of the
108 * resource loading operation. Loading resources in separate worker thread is recommended.
109 * Multi-threading note: this method will be called from the main thread only i.e. not
110 * from within the Core::Render() method.
111 * @param[in] request A unique resource request. This is not guaranteed to survive after LoadResource
112 * returns; the loading process should take a copy.
114 virtual void LoadResource(const ResourceRequest& request) = 0;
117 * Request a resource from the native filesystem. This is a synchronous request, i.e.
118 * it will block the main loop whilst executing. It should therefore be used sparingly.
120 * Multi-threading note: this method will be called from the main thread only i.e. not
121 * from within the Core::Render() method.
122 * @param[in] resourceType The type of resource to load
123 * @param[in] resourcePath The path to the resource
124 * @return A pointer to a ref-counted resource
126 virtual ResourcePointer LoadResourceSynchronously( const ResourceType& resourceType, const std::string& resourcePath ) = 0;
129 * Request that a resource be saved to the native filesystem.
130 * This is an asynchronous request.
132 virtual void SaveResource(const ResourceRequest& request) = 0;
134 * Cancel an ongoing LoadResource() request.
135 * Multi-threading note: this method will be called from the main thread only i.e. not
136 * from within the Core::Render() method.
137 * @param[in] id The ID of the resource to cancel.
138 * @param[in] typeId The ID type of the resource to cancel.
140 virtual void CancelLoad(ResourceId id, ResourceTypeId typeId) = 0;
143 * Query whether any asynchronous LoadResource() requests are ongoing.
144 * Multi-threading note: this method may be called from either the main or rendering thread.
145 * @return True if resources are being loaded.
147 virtual bool IsLoading() = 0;
150 * Retrieve newly loaded resources.
151 * If no resources have finished loading, then this method returns immediately.
152 * Multi-threading note: this method will be called from the update thread, from within
153 * the UpdateManager::Update() method.
154 * @param[in] cache The resource cache to fill.
156 virtual void GetResources(ResourceCache& cache) = 0;
159 * Waits for the asynchronous loader threads (if any) to finish.
160 * This will be only be called before Core destruction; no resource loading requests will be
161 * made following this method.
163 virtual void JoinLoaderThreads() = 0;
168 * Called by Dali to retrieve the default font family for the platform.
169 * Multi-threading note: this method will be called from the main thread only i.e. not
170 * from within the Core::Render() method.
171 * @return The default font family.
173 virtual const std::string& GetDefaultFontFamily() const = 0;
176 * Called by Dali to retrieve the default font size for the platform in points.
177 * Multi-threading note: this method will be called from the main thread only i.e. not
178 * from within the Core::Render() method.
179 * @return The default font size.
181 virtual float GetDefaultFontSize() const = 0;
184 * Gets a font line height to match a given caps-height
186 * @note fontFamily and fontStyle must have been validated previously.
187 * @see ValidateFontFamilyName().
189 * @param[in] fontFamily The name of the font's family
190 * @param[in] fontStyle The style of the font
191 * @param[in] capsHeight The caps-height in pixels
193 virtual PixelSize GetFontLineHeightFromCapsHeight(const std::string& fontFamily, const std::string& fontStyle, CapsHeight capsHeight) const = 0;
196 * Called by Font objects to synchronously query glyph data.
198 * @note fontFamily and font style, included in the resource request, must have been validated previously.
199 * @see ValidateFontFamilyName().
201 * @note Font's style goes inside the textRequest parameter
202 * @param[in] textRequest Resource request. Includes font's style.
203 * @param[in] fontFamily The name of the font's family
204 * @param[in] getBitmap Whether to load bitmaps for the symbols as well
205 * @return A GlyphSet pointer with a list of the requested glyph metrics.
207 virtual Integration::GlyphSet* GetGlyphData ( const Integration::TextResourceType& textRequest,
208 const std::string& fontFamily,
209 bool getBitmap) const = 0;
212 * Called by GlyphResourceManager to synchronously load glyph data.
214 * @note fontFamily and font style, included in the resource request, must have been validated previously.
215 * @see ValidateFontFamilyName().
217 * @param[in] textRequest resource request
218 * @param[in] fontFamily name of the font's family
219 * @return A GlyphSet pointer containing the requested glyph bitmaps.
221 virtual Integration::GlyphSet* GetCachedGlyphData( const TextResourceType& textRequest,
222 const std::string& fontFamily ) const = 0;
225 * Called by Font objects to synchronously query global font metrics.
227 * @note fontFamily and fontStyle, must have been validated previously.
228 * @see ValidateFontFamilyName().
230 * @param[in] fontFamily The name of the font's family
231 * @param[in] fontStyle The style of the font
232 * @param[out] globalMetrics font requested global metrics.
234 virtual void GetGlobalMetrics( const std::string& fontFamily,
235 const std::string& fontStyle,
236 Integration::GlobalMetrics& globalMetrics ) const = 0;
239 * Sets horizontal and vertical pixels per inch value that is used by the display
240 * @param[in] dpiHorizontal horizontal dpi value
241 * @param[in] dpiVertical vertical dpi value
243 virtual void SetDpi (unsigned int dpiHorizontal, unsigned int dpiVertical) = 0;
246 * Returns the name of the font's family for displayed text.
247 * If possible, the returned font name should be able to display all characters in text.
248 * Otherwise returns closest match.
249 * @param[in] charsRequested displayed text
251 virtual const std::string& GetFontFamilyForChars(const TextArray& charsRequested) const = 0;
254 * Checks whether all characters of text could be displayed with specified font family.
256 * @note fontFamily and fontStyle must have been validated previously.
257 * @see ValidateFontFamilyName().
259 * @param[in] fontFamily The name of the font's family
260 * @param[in] fontStyle The style of the font
261 * @param[in] text displayed text
263 virtual bool AllGlyphsSupported(const std::string& fontFamily, const std::string& fontStyle, const TextArray& text) const = 0;
266 * Checks whether fontName is a valid font family name and fontStyle is a valid font style.
267 * closestFontFamilyMatch and closestFontStyleMatch are always set to the best matching font
268 * or the system default font if no near match is detected.
269 * @param[in] fontFamily The name of the font's family
270 * @param[in] fontStyle The style of the font
271 * @param[out] isDefaultSystemFont Whether this font has been created with a default system font.
272 * @param[out] closestFontFamilyMatch Name of the font's family found based on the user input family's name
273 * @param[out] closestFontStyleMatch Name of the font's style found based on the user input font's style
274 * @return Whether a valid match has been found.
276 virtual bool ValidateFontFamilyName(const std::string& fontFamily, const std::string& fontStyle, bool& isDefaultSystemFont, std::string& closestFontFamilyMatch, std::string& closestFontStyleMatch) const = 0;
279 * The mode for GetFontList()
284 LIST_APPLICATION_FONTS,
289 * Gets a list of fonts installed on the system.
290 * @param[in] mode which fonts to include in the list.
291 * @param[out] fontList The list of font family names.
293 virtual void GetFontList( FontListMode mode, std::vector<std::string>& fontList ) const = 0;
296 * Load a file into a buffer
297 * @param[in] filename The filename to load
298 * @param[out] buffer A buffer to receive the file.
299 * @result true if the file is loaded.
301 virtual bool LoadFile( const std::string& filename, std::vector< unsigned char >& buffer ) const = 0;
304 * Load a file into a buffer
305 * @param[in] filename The filename to save
306 * @param[out] buffer A buffer containing some data
307 * The buffer is implemeneted with a std::vector. The size() member specifies the buffer length.
308 * @result true if the file is saved.
310 virtual bool SaveFile(const std::string& filename, std::vector< unsigned char >& buffer) const = 0;
313 * This method re-loads the device defaults that Dali uses. Adaptor will call this
314 * when devices settings change.
316 virtual void UpdateDefaultsFromDevice() = 0;
319 * Get a pointer to the DynamicsFactory.
321 virtual DynamicsFactory* GetDynamicsFactory() = 0;
324 * Read from the metrics cache into the global metrics parameter
326 * @note fontFamily and fontStyle must have been validated previously.
327 * @see ValidateFontFamilyName().
329 * @param[in] fontFamily The name of the font family
330 * @param[in] fontStyle The name of the font style
331 * @param[out] globalMetrics The data store to write into
332 * @return \e true if the operation succeeded
334 virtual bool ReadGlobalMetricsFromCache( const std::string& fontFamily,
335 const std::string& fontStyle,
336 Integration::GlobalMetrics& globalMetrics ) = 0;
340 * @note fontFamily and fontStyle must have been validated previously.
341 * @see ValidateFontFamilyName().
343 * Write the global metrics parameter to the metrics cache
344 * @param[in] fontFamily The name of the font family
345 * @param[in] fontStyle The name of the font style
346 * @param[out] globalMetrics The data store to write
348 virtual void WriteGlobalMetricsToCache( const std::string& fontFamily,
349 const std::string& fontStyle,
350 const Integration::GlobalMetrics& globalMetrics ) = 0;
353 * Read the metrics from the cache into the supplied vector
355 * @note fontFamily and fontStyle must have been validated previously.
356 * @see ValidateFontFamilyName().
358 * @param[in] fontFamily The name of the font family
359 * @param[in] fontStyle The name of the font style
360 * @param[out] glyphMetricsContainer The vector of metrics to write
361 * @return true if the operation succeeded
363 virtual bool ReadMetricsFromCache( const std::string& fontFamily,
364 const std::string& fontStyle,
365 std::vector<Integration::GlyphMetrics>& glyphMetricsContainer ) = 0;
368 * Write the metrics to the cache
370 * @note fontFamily and fontStyle must have been validated previously.
371 * @see ValidateFontFamilyName().
373 * @param[in] fontFamily The name of the font family
374 * @param[in] fontStyle The name of the font style
375 * @param[in] glyphSet The set of metrics to write
377 virtual void WriteMetricsToCache( const std::string& fontFamily,
378 const std::string& fontStyle,
379 const Integration::GlyphSet& glyphSet ) = 0;
382 * Retrieves file names from the given directory.
384 * @param[in] directoryName The directory name.
385 * @param[out] fileNames The file names in the given directory.
387 virtual void GetFileNamesFromDirectory( const std::string& directoryName,
388 std::vector<std::string>& fileNames ) = 0;
391 * Retrieves the glyph image which represents the character.
393 * @param[in] fontFamily The font's family name.
394 * @param[in] fontStyle The font's style.
395 * @param[in] fontSize The font's size (in points).
396 * @param[in] character The given character.
398 * @return A bitmap representing the character.
400 virtual Integration::BitmapPtr GetGlyphImage( const std::string& fontFamily, const std::string& fontStyle, float fontSize, uint32_t character ) const = 0;
403 * Load a shader binary file into a buffer
404 * @param[in] filename The shader binary filename to load
405 * @param[out] buffer A buffer to receive the file.
406 * @result true if the file is loaded.
408 virtual bool LoadShaderBinFile( const std::string& filename, std::vector< unsigned char >& buffer ) const = 0;
410 }; // class PlatformAbstraction
412 } // namespace Integration
416 #endif // __DALI_INTEGRATION_PLATFORM_ABSTRACTION_H__