586 lines
18 KiB
C
586 lines
18 KiB
C
#ifndef __ETHUMB_H__
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#define __ETHUMB_H__ 1
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#include <Eina.h>
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#include <Efl_Config.h>
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#ifdef EAPI
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# undef EAPI
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#endif
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#ifdef _WIN32
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# ifdef EFL_BUILD
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# ifdef DLL_EXPORT
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# define EAPI __declspec(dllexport)
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# else
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# define EAPI
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# endif
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# else
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# define EAPI __declspec(dllimport)
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# endif
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#else
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# ifdef __GNUC__
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# if __GNUC__ >= 4
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# define EAPI __attribute__ ((visibility("default")))
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# else
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# define EAPI
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# endif
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# else
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# define EAPI
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# endif
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define ETHUMB_VERSION_MAJOR EFL_VERSION_MAJOR
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#define ETHUMB_VERSION_MINOR EFL_VERSION_MINOR
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/**
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* @typedef Ethumb_Version
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* Represents the current version of Ethumb
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*/
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typedef struct _Ethumb_Version
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{
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int major; /** < major (binary or source incompatible changes) */
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int minor; /** < minor (new features, bugfixes, major improvements version) */
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int micro; /** < micro (bugfix, internal improvements, no new features version) */
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int revision; /** < git revision (0 if a proper release or the git revision number Ethumb is built from) */
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} Ethumb_Version;
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EAPI extern Ethumb_Version *ethumb_version;
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/**
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* @page ethumb_main Ethumb
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*
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* @date 2009 (created)
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*
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* @section toc Table of Contents
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*
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* @li @ref ethumb_main_intro
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* @li @ref ethumb_main_compiling
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* @li @ref ethumb_main_next_steps
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*
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* @section ethumb_main_intro Introduction
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*
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* Ethumb will use @ref Evas to generate thumbnail images of given
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* files. The API allows great customization of the generated files
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* and also helps compling to FreeDesktop.Org Thumbnail Specification
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* (http://specifications.freedesktop.org/thumbnail-spec/thumbnail-spec-latest.html)
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*
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* However, thumbnailing can be an expensive process that will impact
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* your application experience, blocking animations and user
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* interaction during the generation. Another problem is that one
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* should try to cache the thumbnails in a place that other
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* applications can benefit from the file.
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*
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* @ref Ethumb_Client exists to solve this. It will communicate with a
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* server using standard D-Bus protocol. The server will use @ref
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* Ethumb itself to generate the thumbnail images and cache them using
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* FreeDesktop.Org standard. It is recommended that most applications
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* use @ref Ethumb_Client instead of @ref Ethumb directly.
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*
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* @section ethumb_main_compiling How to compile
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*
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* Ethumb is a library your application links to. The procedure for
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* this is very simple. Note that usually you want the D-Bus client
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* library. You simply have to compile your application with the
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* appropriate compiler flags that the @c pkg-config script
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* outputs. For example:
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*
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* Compiling C or C++ files into object files:
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*
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* @verbatim
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gcc -c -o main.o main.c `pkg-config --cflags ethumb_client`
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@endverbatim
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*
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* Linking object files into a binary executable:
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*
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* @verbatim
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gcc -o my_application main.o `pkg-config --libs ethumb_client`
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@endverbatim
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*
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* See @ref pkgconfig
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*
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* @section ethumb_main_next_steps Next Steps
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*
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* After you understood what Ethumb is and installed it in your system
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* you should proceed understanding the programming interface.
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*
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* Recommended reading:
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*
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* @li @ref Ethumb_Client to generate thumbnails using a server
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* (recommended).
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* @li @ref Ethumb to generate thumbnails in the local process.
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*
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*/
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/**
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* @defgroup Ethumb Ethumb
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*
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* @{
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*/
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/**
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* @defgroup Ethumb_Basics Ethumb Basics
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*
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* Functions that all users must know of to use Ethumb.
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*
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* @{
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*/
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/**
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* @brief thumbnailer handle.
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*
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* The handle is returned by ethumb_new() and destroyed by ethumb_free().
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*/
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typedef struct _Ethumb Ethumb;
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/**
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* @brief reports results of ethumb_generate().
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*
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* @param data extra context given to ethumb_generate().
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* @param e handle of the current thumbnailer.
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* @param success @c EINA_TRUE if generated or @c EINA_FALSE on errors.
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*/
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typedef void (*Ethumb_Generate_Cb)(void *data, Ethumb *e, Eina_Bool success);
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/**
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* @brief Initialize ethumb.
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* @return 1 or greater on success, 0 otherwise.
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*/
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EAPI int ethumb_init(void);
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/**
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* @brief Shutdown ethumb, unloading all currently-loaded modules.
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* @return 0 if ethumb shuts down, an integer greater than 0 otherwise.
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*/
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EAPI int ethumb_shutdown(void);
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/**
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* @brief Create a new ethumb object.
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* return The newly-created ethumb object
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*/
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EAPI Ethumb * ethumb_new(void) EINA_MALLOC EINA_WARN_UNUSED_RESULT;
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/**
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* @brief Free an ethumb object.
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*/
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EAPI void ethumb_free(Ethumb *e);
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/**
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* @}
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*/
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/**
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* @defgroup Ethumb_Setup Ethumb Fine Tune Setup
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*
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* How to fine tune thumbnail generation, setting size, aspect,
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* frames, quality and so on.
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*
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* @{
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*/
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/**
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*
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* @brief Set the Ethumb Frame
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*
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* This can be used to simulate wood frames in the Thumbnails
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*
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* @param e handle of the current thumbnailer.
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* @param theme_file the edje theme file
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* @param group the edje group in theme
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* @param swallow the edje swallow in theme
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*
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* @return EINA_TRUE on success and EINA_FALSE on failure
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*/
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EAPI Eina_Bool ethumb_frame_set(Ethumb *e, const char *theme_file, const char *group, const char *swallow) EINA_ARG_NONNULL(1);
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/**
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* @brief Retreives the current ethumb frame of and Ethumb instance.
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*
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* @param e handle of the current thumbnailer.
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* @param theme_file will be setted with the edje theme
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* @param group will be setted with the edje group
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* @param swallow will be setted with the edje swallow
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*/
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EAPI void ethumb_frame_get(const Ethumb *e, const char **theme_file, const char **group, const char **swallow) EINA_ARG_NONNULL(1);
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/**
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* @brief Set the ethumb thumbnails path
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*
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* @param e handle of the current thumbnailer.
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* @param path The thumbnails path
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*
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*/
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EAPI void ethumb_thumb_dir_path_set(Ethumb *e, const char *path) EINA_ARG_NONNULL(1);
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/**
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* @brief Get the ethumb thumbnails path
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*
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* @param e handle of the current thumbnailer.
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*
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* @return The thumbnails path for the current thumbnailer
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*/
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EAPI const char *ethumb_thumb_dir_path_get(const Ethumb *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_PURE;
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/**
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* @brief Set the thumbnails category
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*
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* @param e handle of the current thumbnailer.
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* @param category the category to set
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*/
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EAPI void ethumb_thumb_category_set(Ethumb *e, const char *category) EINA_ARG_NONNULL(1);
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/**
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* @brief Get the thumbnails category
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*
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* @param e handle of the current thumbnailer
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*
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* @return the current thumbnailer thumbnails category
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*/
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EAPI const char *ethumb_thumb_category_get(const Ethumb *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_PURE;
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EAPI void ethumb_thumb_path_set(Ethumb *e, const char *path, const char *key) EINA_ARG_NONNULL(1);
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EAPI void ethumb_thumb_path_get(Ethumb *e, const char **path, const char **key) EINA_ARG_NONNULL(1);
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EAPI void ethumb_thumb_hash(Ethumb *e) EINA_ARG_NONNULL(1);
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EAPI void ethumb_thumb_hash_copy(Ethumb *dst, const Ethumb *src) EINA_ARG_NONNULL(1, 2);
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typedef enum _Ethumb_Thumb_FDO_Size
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{
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ETHUMB_THUMB_NORMAL, /**< 128x128 as defined by FreeDesktop.Org standard */
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ETHUMB_THUMB_LARGE /**< 256x256 as defined by FreeDesktop.Org standard */
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} Ethumb_Thumb_FDO_Size;
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typedef enum _Ethumb_Thumb_Format
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{
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ETHUMB_THUMB_FDO, /**< PNG as defined by FreeDesktop.Org standard */
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ETHUMB_THUMB_JPEG, /**< JPEGs are often smaller and faster to read/write */
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ETHUMB_THUMB_EET /**< EFL's own storage system, supports key parameter */
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} Ethumb_Thumb_Format;
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typedef enum _Ethumb_Thumb_Aspect
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{
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ETHUMB_THUMB_KEEP_ASPECT, /**< keep original proportion between width and height */
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ETHUMB_THUMB_IGNORE_ASPECT, /**< ignore aspect and foce it to match thumbnail's width and height */
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ETHUMB_THUMB_CROP /**< keep aspect but crop (cut) the largest dimension */
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} Ethumb_Thumb_Aspect;
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typedef enum _Ethumb_Thumb_Orientation
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{
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ETHUMB_THUMB_ORIENT_NONE, /**< keep orientation as pixel data is */
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ETHUMB_THUMB_ROTATE_90_CW, /**< rotate 90° clockwise */
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ETHUMB_THUMB_ROTATE_180, /**< rotate 180° */
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ETHUMB_THUMB_ROTATE_90_CCW, /**< rotate 90° counter-clockwise */
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ETHUMB_THUMB_FLIP_HORIZONTAL, /**< flip horizontally */
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ETHUMB_THUMB_FLIP_VERTICAL, /**< flip vertically */
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ETHUMB_THUMB_FLIP_TRANSPOSE, /**< transpose */
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ETHUMB_THUMB_FLIP_TRANSVERSE, /**< transverse */
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ETHUMB_THUMB_ORIENT_ORIGINAL /**< use orientation from metadata (EXIF-only currently) */
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} Ethumb_Thumb_Orientation;
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EAPI void ethumb_thumb_fdo_set(Ethumb *e, Ethumb_Thumb_FDO_Size s) EINA_ARG_NONNULL(1);
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/**
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* @brief Set the size of thumbnails.
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*
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* @param e A pointer to an Ethumb object.
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* @param tw Thumbnail width.
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* @param th Thumbnail height.
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*/
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EAPI void ethumb_thumb_size_set(Ethumb *e, int tw, int th) EINA_ARG_NONNULL(1);
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/**
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* @brief Get the size of thumbnails.
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*
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* @param e A pointer to an Ethumb object.
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* @param[out] tw Pointer to an int to store the thumbnail width.
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* @param[out] th Pointer to an int to store the thumbnail height.
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*/
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EAPI void ethumb_thumb_size_get(const Ethumb *e, int *tw, int *th) EINA_ARG_NONNULL(1);
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/**
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* @brief Set the fileformat of the thumbnails
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*
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* Thumbnails are sent compressed; possible formats are PNG, JPEG and EET.
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*
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* @param e A pointer to an Ethumb object.
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*/
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EAPI void ethumb_thumb_format_set(Ethumb *e, Ethumb_Thumb_Format f) EINA_ARG_NONNULL(1);
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/**
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* @brief Get the fileformat of the thumbnails
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*
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* @param e A pointer to an Ethumb object.
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* @return The thumbnail fileformat
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*
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* @see ethumb_thumb_format_set
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*/
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EAPI Ethumb_Thumb_Format ethumb_thumb_format_get(const Ethumb *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_PURE;
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/**
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* @brief Set the aspect ratio policy.
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*
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* When the source and thumbnail aspect ratios don't match, this policy sets
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* how to adapt from the former to the latter: resize keeping source aspect
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* ratio, resize ignoring it or crop.
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*
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* @param e A pointer to an Ethumb object.
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* @param aspect The new aspect ratio policy.
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*/
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EAPI void ethumb_thumb_aspect_set(Ethumb *e, Ethumb_Thumb_Aspect aspect) EINA_ARG_NONNULL(1);
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/**
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* @brief Get the aspect ratio policy.
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*
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* @param e A pointer to an Ethumb object.
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* @return The aspect ratio policy.
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*/
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EAPI Ethumb_Thumb_Aspect ethumb_thumb_aspect_get(const Ethumb *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_PURE;
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/**
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* @brief Set the thumbnail rotation or flip.
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*
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* @param e A pointer to an Ethumb object.
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* @param orientation The new orientation.
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*/
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EAPI void ethumb_thumb_orientation_set(Ethumb *e, Ethumb_Thumb_Orientation orientation) EINA_ARG_NONNULL(1);
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/**
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* @brief Get the thumbnail rotation.
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*
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* @param e A pointer to an Ethumb object.
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* @return The current rotation.
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*/
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EAPI Ethumb_Thumb_Orientation ethumb_thumb_orientation_get(const Ethumb *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_PURE;
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EAPI void ethumb_thumb_crop_align_set(Ethumb *e, float x, float y) EINA_ARG_NONNULL(1);
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EAPI void ethumb_thumb_crop_align_get(const Ethumb *e, float *x, float *y) EINA_ARG_NONNULL(1);
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/**
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* @brief Set the thumbnail compression quality.
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*
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* @param e A pointer to an Ethumb object.
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* @param quality Compression quality (from 0 to 100, 100 being the best; default is 80)
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*/
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EAPI void ethumb_thumb_quality_set(Ethumb *e, int quality) EINA_ARG_NONNULL(1);
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/**
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* @brief Get the thumbnail compression quality.
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*
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* @param e A pointer to an Ethumb object.
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* @return The current compression quality (from 0 to 100, 100 being the best)
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*/
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EAPI int ethumb_thumb_quality_get(const Ethumb *e) EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT EINA_PURE;
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/**
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* @brief Set the compression rate
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*
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* @param e handle of the current thumbnailer.
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* @param compress the compression rate (in percentage)
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*
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*/
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EAPI void ethumb_thumb_compress_set(Ethumb *e, int compress) EINA_ARG_NONNULL(1);
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/**
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* @brief Get the compression rate
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*
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* @param e handle of the current thumbnailer.
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*
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* @return the compression rate (in percentage)
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*/
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EAPI int ethumb_thumb_compress_get(const Ethumb *e) EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT EINA_PURE;
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/**
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* @brief set the video play start point
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*
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* Set the start point of video thumbnail
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*
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* @param e handle of the current thumbnailer.
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* @param start the start point (float from 0.0 to 1.0)
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*/
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EAPI void ethumb_video_start_set(Ethumb *e, float start) EINA_ARG_NONNULL(1);
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/**
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* @brief get the video play start point
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*
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* Get the start point of video thumbnail
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*
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* @param e handle of the current thumbnailer.
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*
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* @return the start point (float from 0.0 to 1.0)
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*/
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EAPI float ethumb_video_start_get(const Ethumb *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_PURE;
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/**
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* @brief Set the video time (duration) in seconds.
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*
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* @param e handle of the current thumbnailer.
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* @param time the video duration in seconds
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*/
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EAPI void ethumb_video_time_set(Ethumb *e, float time) EINA_ARG_NONNULL(1);
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/**
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* @brief Get the video time (duration) in seconds.
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*
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* @param e handle of the current thumbnailer.
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* @return the video duration in seconds
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*/
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EAPI float ethumb_video_time_get(const Ethumb *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_PURE;
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/**
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* @brief Set the video frame interval, in seconds
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*
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* This is useful for animated thumbnail and will define skip time
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* before going to the next frame. Note that video backends might not
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* be able to precisely skip that amount as it will depend on various
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* factors, including video encoding.
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*
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* @param e handle of the current thumbnailer.
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* @param interval the frame display interval in seconds
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*/
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EAPI void ethumb_video_interval_set(Ethumb *e, float interval) EINA_ARG_NONNULL(1);
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/**
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* @brief Get the video frame interval, in seconds
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*
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* @param e handle of the current thumbnailer.
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* @return the frame display interval in seconds
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*/
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EAPI float ethumb_video_interval_get(const Ethumb *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_PURE;
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/**
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* @brief Set the number of times the video loops (if applicable).
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*
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* @param e A pointer to an Ethumb object.
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* @param ntimes The number of times the video loops.
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*/
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EAPI void ethumb_video_ntimes_set(Ethumb *e, unsigned int ntimes) EINA_ARG_NONNULL(1);
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/**
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* @brief Get the number of times the video loops (if applicable).
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*
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* @param e A pointer to an Ethumb object.
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* @return The number of times the video loops.
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*/
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EAPI unsigned int ethumb_video_ntimes_get(const Ethumb *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_PURE;
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/**
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* @brief Set the thumbnail framerate.
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*
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* @param e A pointer to an Ethumb object.
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* @param fps New framerate of the thumbnail (default 10).
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*/
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EAPI void ethumb_video_fps_set(Ethumb *e, unsigned int fps) EINA_ARG_NONNULL(1);
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/**
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* @brief Get the thumbnail framerate.
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*
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* @param e A pointer to an Ethumb object.
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* @return Current framerate of the thumbnail.
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*/
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EAPI unsigned int ethumb_video_fps_get(const Ethumb *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_PURE;
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/**
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* @brief Set the page number to thumbnail in paged documents
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*
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* @param e handle of the current thumbnailer.
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* @param page the page number.
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*/
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EAPI void ethumb_document_page_set(Ethumb *e, unsigned int page) EINA_ARG_NONNULL(1);
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/**
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* @brief Get the page number thumbnailed in paged documents
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*
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* @param e handle of the current thumbnailer.
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* @return the page number.
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*/
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EAPI unsigned int ethumb_document_page_get(const Ethumb *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_PURE;
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/**
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* @}
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*/
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/**
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* @addtogroup Ethumb_Basics Ethumb Basics
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* @{
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*/
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/**
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* @brief Set the file for which to generate thumbnails.
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*
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* @param e A pointer to an Ethumb object.
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* @param path The file to use.
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* @param key If @a path allows storing multiple resources in a single file
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* (EET or Edje for instance), @a key is the key used to locate the
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* right resource inside the file. NULL if not applicable.
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*/
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EAPI Eina_Bool ethumb_file_set(Ethumb *e, const char *path, const char *key) EINA_ARG_NONNULL(1, 2);
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/**
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* @brief Get the file for which to generate thumbnails.
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*
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* @param e A pointer to an Ethumb object.
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* @param[out] path The file being used.
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* @param[out] key The key used to locate the right resource in case the file
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* can store several of them. NULL if not applicable.
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* @see ethumb_file_set
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*/
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EAPI void ethumb_file_get(const Ethumb *e, const char **path, const char **key) EINA_ARG_NONNULL(1);
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/**
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* @brief Reset the source file information.
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*
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* @param e A pointer to an Ethumb object.
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|
*/
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EAPI void ethumb_file_free(Ethumb *e) EINA_ARG_NONNULL(1);
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/**
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* @brief Generate the thumbnail.
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*
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* @param e handle of the current thumbnailer.
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* @param finished_cb The callback function to run on opertaion end
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* @param free_data The callback function to run on free data.
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*
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* @return EINA_TRUE on success and EINA_FALSE on failure
|
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*/
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EAPI Eina_Bool ethumb_generate(Ethumb *e, Ethumb_Generate_Cb finished_cb, const void *data, Eina_Free_Cb free_data) EINA_ARG_NONNULL(1, 2);
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/**
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* @brief test if the thumbnailer exists
|
|
*
|
|
* @param e handle of the thumbnailer to test.
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*
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* @return EINA_TRUE if thumbnailer exists and EINA_FALSE otherwise.
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|
*/
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EAPI Eina_Bool ethumb_exists(Ethumb *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_PURE;
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/**
|
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* @brief Duplicate an thumbnailer
|
|
*
|
|
* @param e Handle of the thumbnailer to duplicate
|
|
*
|
|
* @return a new allocated copy of the thumbnailer.
|
|
*/
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EAPI Ethumb *ethumb_dup(const Ethumb *e) EINA_ARG_NONNULL(1);
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/**
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|
* @brief Compare two thumbnailers.
|
|
*
|
|
* @param e1 First handle of thumbnailer to compare
|
|
* @param e2 Second handle of thumbnailer to compare
|
|
*
|
|
* @return EINA_TRUE if the thumbnailers are equal and EINA_FALSE otherwise
|
|
*/
|
|
EAPI Eina_Bool ethumb_cmp(const Ethumb *e1, const Ethumb *e2) EINA_ARG_NONNULL(1, 2) EINA_WARN_UNUSED_RESULT EINA_PURE;
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EAPI int ethumb_hash(const void *key, int key_length) EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT EINA_PURE;
|
|
EAPI int ethumb_key_cmp(const void *key1, int key1_length,
|
|
const void *key2, int key2_length) EINA_ARG_NONNULL(1, 3) EINA_WARN_UNUSED_RESULT EINA_PURE;
|
|
EAPI unsigned int ethumb_length(const void *key) EINA_PURE EINA_WARN_UNUSED_RESULT;
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|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
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|
|
#undef EAPI
|
|
#define EAPI
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|
|
#endif /* __ETHUMB_H__ */
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