Telegram-Android/TMessagesProj/jni/rlottie/inc/rlottie_capi.h

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2019-07-18 15:01:39 +02:00
/*
* Copyright (c) 2018 Samsung Electronics Co., Ltd. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _RLOTTIE_CAPI_H_
#define _RLOTTIE_CAPI_H_
#include <stddef.h>
#include <stdint.h>
#include <rlottiecommon.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct Lottie_Animation_S Lottie_Animation;
/**
* @brief Constructs an animation object from file path.
*
* @param[in] path Lottie resource file path
*
* @return Animation object that can build the contents of the
* Lottie resource represented by file path.
*
* @see lottie_animation_destroy()
*
* @ingroup Lottie_Animation
* @internal
*/
LOT_EXPORT Lottie_Animation *lottie_animation_from_file(const char *path);
/**
* @brief Constructs an animation object from JSON string data.
*
* @param[in] data The JSON string data.
* @param[in] key the string that will be used to cache the JSON string data.
* @param[in] resource_path the path that will be used to load external resource needed by the JSON data.
*
* @return Animation object that can build the contents of the
* Lottie resource represented by JSON string data.
*
* @ingroup Lottie_Animation
* @internal
*/
LOT_EXPORT Lottie_Animation *lottie_animation_from_data(const char *data, const char *key, const char *resource_path);
/**
* @brief Free given Animation object resource.
*
* @param[in] animation Animation object to free.
*
* @see lottie_animation_from_file()
* @see lottie_animation_from_data()
*
* @ingroup Lottie_Animation
* @internal
*/
LOT_EXPORT void lottie_animation_destroy(Lottie_Animation *animation);
/**
* @brief Returns default viewport size of the Lottie resource.
*
* @param[in] animation Animation object.
* @param[out] w default width of the viewport.
* @param[out] h default height of the viewport.
*
* @ingroup Lottie_Animation
* @internal
*/
LOT_EXPORT void lottie_animation_get_size(const Lottie_Animation *animation, size_t *width, size_t *height);
/**
* @brief Returns total animation duration of Lottie resource in second.
* it uses totalFrame() and frameRate() to calculate the duration.
* duration = totalFrame() / frameRate().
*
* @param[in] animation Animation object.
*
* @return total animation duration in second.
* @c 0 if the Lottie resource has no animation.
*
* @see lottie_animation_get_totalframe()
* @see lottie_animation_get_framerate()
*
* @ingroup Lottie_Animation
* @internal
*/
LOT_EXPORT double lottie_animation_get_duration(const Lottie_Animation *animation);
/**
* @brief Returns total number of frames present in the Lottie resource.
*
* @param[in] animation Animation object.
*
* @return frame count of the Lottie resource.*
*
* @note frame number starts with 0.
*
* @see lottie_animation_get_duration()
* @see lottie_animation_get_framerate()
*
* @ingroup Lottie_Animation
* @internal
*/
LOT_EXPORT size_t lottie_animation_get_totalframe(const Lottie_Animation *animation);
/**
* @brief Returns default framerate of the Lottie resource.
*
* @param[in] animation Animation object.
*
* @return framerate of the Lottie resource
*
* @ingroup Lottie_Animation
* @internal
*
*/
LOT_EXPORT double lottie_animation_get_framerate(const Lottie_Animation *animation);
/**
* @brief Get the render tree which contains the snapshot of the animation object
* at frame = @c frame_num, the content of the animation in that frame number.
*
* @param[in] animation Animation object.
* @param[in] frame_num Content corresponds to the @p frame_num needs to be drawn
* @param[in] width requested snapshot viewport width.
* @param[in] height requested snapshot viewport height.
*
* @return Animation snapshot tree.
*
* @note: User has to traverse the tree for rendering.
*
* @see LOTLayerNode
* @see LOTNode
*
* @ingroup Lottie_Animation
* @internal
*/
LOT_EXPORT const LOTLayerNode * lottie_animation_render_tree(Lottie_Animation *animation,
size_t frame_num,
size_t width, size_t height);
/**
* @brief Maps position to frame number and returns it.
*
* @param[in] animation Animation object.
* @param[in] pos position in the range [ 0.0 .. 1.0 ].
*
* @return mapped frame numbe in the range [ start_frame .. end_frame ].
* @c 0 if the Lottie resource has no animation.
*
*
* @ingroup Lottie_Animation
* @internal
*/
LOT_EXPORT size_t lottie_animation_get_frame_at_pos(const Lottie_Animation *animation, float pos);
/**
* @brief Request to render the content of the frame @p frame_num to buffer @p buffer.
*
* @param[in] animation Animation object.
* @param[in] frame_num the frame number needs to be rendered.
* @param[in] buffer surface buffer use for rendering.
* @param[in] width width of the surface
* @param[in] height height of the surface
* @param[in] bytes_per_line stride of the surface in bytes.
*
*
* @ingroup Lottie_Animation
* @internal
*/
LOT_EXPORT void
lottie_animation_render(Lottie_Animation *animation,
size_t frame_num,
uint32_t *buffer,
size_t width,
size_t height,
size_t bytes_per_line);
/**
* @brief Request to render the content of the frame @p frame_num to buffer @p buffer asynchronously.
*
* @param[in] animation Animation object.
* @param[in] frame_num the frame number needs to be rendered.
* @param[in] buffer surface buffer use for rendering.
* @param[in] width width of the surface
* @param[in] height height of the surface
* @param[in] bytes_per_line stride of the surface in bytes.
*
* @note user must call lottie_animation_render_flush() to make sure render is finished.
*
* @ingroup Lottie_Animation
* @internal
*/
LOT_EXPORT void
lottie_animation_render_async(Lottie_Animation *animation,
size_t frame_num,
uint32_t *buffer,
size_t width,
size_t height,
size_t bytes_per_line);
/**
* @brief Request to finish the current async renderer job for this animation object.
* If render is finished then this call returns immidiately.
* If not, it waits till render job finish and then return.
*
* @param[in] animation Animation object.
*
* @warning User must call lottie_animation_render_async() and lottie_animation_render_flush()
* in pair to get the benefit of async rendering.
*
* @return the pixel buffer it finished rendering.
*
* @ingroup Lottie_Animation
* @internal
*/
LOT_EXPORT uint32_t *
lottie_animation_render_flush(Lottie_Animation *animation);
#ifdef __cplusplus
}
#endif
#endif //_RLOTTIE_CAPI_H_