mirror of
https://github.com/libretro/RetroArch.git
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280 lines
9.8 KiB
C
280 lines
9.8 KiB
C
/* Copyright (C) 2010-2019 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (gfx_thumbnail.c).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __GFX_THUMBNAIL_H
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#define __GFX_THUMBNAIL_H
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#include <retro_common_api.h>
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#include <libretro.h>
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#include <boolean.h>
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#include "gfx_thumbnail_path.h"
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RETRO_BEGIN_DECLS
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/* Defines the current status of an entry
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* thumbnail texture */
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enum gfx_thumbnail_status
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{
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GFX_THUMBNAIL_STATUS_UNKNOWN = 0,
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GFX_THUMBNAIL_STATUS_PENDING,
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GFX_THUMBNAIL_STATUS_AVAILABLE,
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GFX_THUMBNAIL_STATUS_MISSING
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};
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/* Defines thumbnail alignment within
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* gfx_thumbnail_draw() bounding box */
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enum gfx_thumbnail_alignment
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{
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GFX_THUMBNAIL_ALIGN_CENTRE = 0,
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GFX_THUMBNAIL_ALIGN_TOP,
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GFX_THUMBNAIL_ALIGN_BOTTOM,
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GFX_THUMBNAIL_ALIGN_LEFT,
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GFX_THUMBNAIL_ALIGN_RIGHT
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};
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/* Defines all possible thumbnail shadow
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* effect types */
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enum gfx_thumbnail_shadow_type
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{
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GFX_THUMBNAIL_SHADOW_NONE = 0,
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GFX_THUMBNAIL_SHADOW_DROP,
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GFX_THUMBNAIL_SHADOW_OUTLINE
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};
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/* Holds all runtime parameters associated with
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* an entry thumbnail */
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typedef struct
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{
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enum gfx_thumbnail_status status;
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uintptr_t texture;
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unsigned width;
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unsigned height;
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float alpha;
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float delay_timer;
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bool fade_active;
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} gfx_thumbnail_t;
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/* Holds all configuration parameters associated
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* with a thumbnail shadow effect */
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typedef struct
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{
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enum gfx_thumbnail_shadow_type type;
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float alpha;
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struct
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{
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float x_offset;
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float y_offset;
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} drop;
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struct
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{
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unsigned width;
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} outline;
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} gfx_thumbnail_shadow_t;
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/* Structure containing all gfx_thumbnail
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* global variables */
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struct gfx_thumbnail_state
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{
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/* When streaming thumbnails, to minimise the processing
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* of unnecessary images (i.e. when scrolling rapidly through
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* playlists), we delay loading until an entry has been on screen
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* for at least gfx_thumbnail_delay ms */
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float stream_delay;
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/* Duration in ms of the thumbnail 'fade in' animation */
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float fade_duration;
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/* When true, 'fade in' animation will also be
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* triggered for missing thumbnails */
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bool fade_missing;
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/* Due to the asynchronous nature of thumbnail
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* loading, it is quite possible to trigger a load
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* then navigate to a different menu list before
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* the load is complete/handled. As an additional
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* safety check, we therefore tag the current menu
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* list with counter value that is incremented whenever
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* a list is cleared/set. This is sent as userdata when
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* requesting a thumbnail, and the upload is only
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* handled if the tag matches the most recent value
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* at the time when the load completes */
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uint64_t list_id;
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};
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typedef struct gfx_thumbnail_state gfx_thumbnail_state_t;
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/* Setters */
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/* When streaming thumbnails, sets time in ms that an
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* entry must be on screen before an image load is
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* requested
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* > if 'delay' is negative, default value is set */
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void gfx_thumbnail_set_stream_delay(float delay);
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/* Sets duration in ms of the thumbnail 'fade in'
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* animation
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* > If 'duration' is negative, default value is set */
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void gfx_thumbnail_set_fade_duration(float duration);
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/* Specifies whether 'fade in' animation should be
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* triggered for missing thumbnails
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* > When 'true', allows menu driver to animate
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* any 'thumbnail unavailable' notifications */
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void gfx_thumbnail_set_fade_missing(bool fade_missing);
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/* Getters */
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/* Fetches current streaming thumbnails request delay */
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float gfx_thumbnail_get_stream_delay(void);
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/* Fetches current 'fade in' animation duration */
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float gfx_thumbnail_get_fade_duration(void);
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/* Fetches current enable state for missing
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* thumbnail 'fade in' animations */
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bool gfx_thumbnail_get_fade_missing(bool fade_missing);
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/* Core interface */
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/* When called, prevents the handling of any pending
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* thumbnail load requests
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* >> **MUST** be called before deleting any gfx_thumbnail_t
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* objects passed to gfx_thumbnail_request() or
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* gfx_thumbnail_process_stream(), otherwise
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* heap-use-after-free errors *will* occur */
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void gfx_thumbnail_cancel_pending_requests(void);
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/* Requests loading of the specified thumbnail
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* - If operation fails, 'thumbnail->status' will be set to
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* MUI_THUMBNAIL_STATUS_MISSING
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* - If operation is successful, 'thumbnail->status' will be
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* set to MUI_THUMBNAIL_STATUS_PENDING
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* 'thumbnail' will be populated with texture info/metadata
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* once the image load is complete
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* NOTE 1: Must be called *after* gfx_thumbnail_set_system()
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* and gfx_thumbnail_set_content*()
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* NOTE 2: 'playlist' and 'idx' are only required here for
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* on-demand thumbnail download support
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* (an annoyance...) */
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void gfx_thumbnail_request(
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gfx_thumbnail_path_data_t *path_data, enum gfx_thumbnail_id thumbnail_id,
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playlist_t *playlist, size_t idx, gfx_thumbnail_t *thumbnail,
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unsigned gfx_thumbnail_upscale_threshold,
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bool network_on_demand_thumbnails
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);
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/* Requests loading of a specific thumbnail image file
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* (may be used, for example, to load savestate images)
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* - If operation fails, 'thumbnail->status' will be set to
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* MUI_THUMBNAIL_STATUS_MISSING
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* - If operation is successful, 'thumbnail->status' will be
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* set to MUI_THUMBNAIL_STATUS_PENDING
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* 'thumbnail' will be populated with texture info/metadata
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* once the image load is complete */
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void gfx_thumbnail_request_file(
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const char *file_path, gfx_thumbnail_t *thumbnail,
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unsigned gfx_thumbnail_upscale_threshold);
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/* Resets (and free()s the current texture of) the
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* specified thumbnail */
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void gfx_thumbnail_reset(gfx_thumbnail_t *thumbnail);
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/* Stream processing */
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/* Handles streaming of the specified thumbnail as it moves
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* on/off screen
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* - Must be called each frame for every on-screen entry
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* - Must be called once for each entry as it moves off-screen
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* (or can be called each frame - overheads are small)
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* NOTE 1: Must be called *after* gfx_thumbnail_set_system()
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* NOTE 2: This function calls gfx_thumbnail_set_content*()
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* NOTE 3: This function is intended for use in situations
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* where each menu entry has a *single* thumbnail.
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* If each entry has two thumbnails, use
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* gfx_thumbnail_process_streams() for improved
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* performance */
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void gfx_thumbnail_process_stream(
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gfx_thumbnail_path_data_t *path_data, enum gfx_thumbnail_id thumbnail_id,
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playlist_t *playlist, size_t idx, gfx_thumbnail_t *thumbnail, bool on_screen,
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unsigned gfx_thumbnail_upscale_threshold,
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bool network_on_demand_thumbnails
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);
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/* Handles streaming of the specified thumbnails as they move
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* on/off screen
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* - Must be called each frame for every on-screen entry
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* - Must be called once for each entry as it moves off-screen
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* (or can be called each frame - overheads are small)
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* NOTE 1: Must be called *after* gfx_thumbnail_set_system()
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* NOTE 2: This function calls gfx_thumbnail_set_content*()
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* NOTE 3: This function is intended for use in situations
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* where each menu entry has *two* thumbnails.
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* If each entry only has a single thumbnail, use
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* gfx_thumbnail_process_stream() for improved
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* performance */
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void gfx_thumbnail_process_streams(
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gfx_thumbnail_path_data_t *path_data,
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playlist_t *playlist, size_t idx,
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gfx_thumbnail_t *right_thumbnail, gfx_thumbnail_t *left_thumbnail,
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bool on_screen,
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unsigned gfx_thumbnail_upscale_threshold,
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bool network_on_demand_thumbnails
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);
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/* Thumbnail rendering */
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/* Determines the actual screen dimensions of a
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* thumbnail when centred with aspect correct
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* scaling within a rectangle of (width x height) */
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void gfx_thumbnail_get_draw_dimensions(
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gfx_thumbnail_t *thumbnail,
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unsigned width, unsigned height, float scale_factor,
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float *draw_width, float *draw_height);
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/* Draws specified thumbnail with specified alignment
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* (and aspect correct scaling) within a rectangle of
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* (width x height).
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* 'shadow' defines an optional shadow effect (may be
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* set to NULL if a shadow effect is not required).
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* NOTE: Setting scale_factor > 1.0f will increase the
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* size of the thumbnail beyond the limits of the
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* (width x height) rectangle (alignment + aspect
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* correct scaling is preserved). Use with caution */
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void gfx_thumbnail_draw(
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void *userdata,
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unsigned video_width,
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unsigned video_height,
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gfx_thumbnail_t *thumbnail,
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float x, float y, unsigned width, unsigned height,
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enum gfx_thumbnail_alignment alignment,
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float alpha, float scale_factor,
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gfx_thumbnail_shadow_t *shadow);
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gfx_thumbnail_state_t *gfx_thumb_get_ptr(void);
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RETRO_END_DECLS
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#endif
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