132 lines
3.6 KiB
C
132 lines
3.6 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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* Copyright (C) 2011-2017 - Daniel De Matteis
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* Copyright (C) 2012-2015 - Michael Lelli
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _PLATFORM_EMSCRIPTEN_H
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#define _PLATFORM_EMSCRIPTEN_H
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#include <boolean.h>
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/**
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* Synchronously run a function on the browser thread.
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*
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* @param func Function to call
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* @param arg Argument to pass to \c func
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*/
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void platform_emscripten_run_on_browser_thread_sync(void (*func)(void*), void* arg);
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/**
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* Asynchronously run a function on the browser thread. Returns immediately.
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*
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* @param func Function to call
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* @param arg Argument to pass to \c func
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*/
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void platform_emscripten_run_on_browser_thread_async(void (*func)(void*), void* arg);
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/**
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* Asynchronously run a function on the program thread. Returns immediately.
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*
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* @param func Function to call
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* @param arg Argument to pass to \c func
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*/
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void platform_emscripten_run_on_program_thread_async(void (*func)(void*), void* arg);
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/**
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* Send command reply.
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*
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* @param msg Reply string
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* @param len Length of \c msg
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*/
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void platform_emscripten_command_reply(const char *msg, size_t len);
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/**
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* Read a command from the command queue.
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*
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* @param into Pointer to store command string
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* @param max_len Length of \c *into
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* @return Length of stored command.
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* Returns 0 if there are no commands in queue.
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*/
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size_t platform_emscripten_command_read(char **into, size_t max_len);
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/**
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* Get the real screen dimensions of the canvas on the page.
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*
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* @param width Pointer to store canvas width
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* @param height Pointer to store canvas height
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*/
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void platform_emscripten_get_canvas_size(int *width, int *height);
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/**
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* Get the ratio of CSS pixels to real screen pixels. Useful for input scaling.
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*
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* @return devicePixelRatio
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*/
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double platform_emscripten_get_dpr(void);
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/**
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* Check if the browser supports Atomics.waitAsync.
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*
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* @return True if async atomics are available.
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*/
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bool platform_emscripten_has_async_atomics(void);
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/**
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* Check if the window is hidden.
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*
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* @return True if the window is hidden.
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*/
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bool platform_emscripten_is_window_hidden(void);
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/**
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* Whether the frame should be dropped.
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* Currently returns true if the window is hidden and vsync is on.
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*
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* @return True if the frame should be dropped.
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*/
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bool platform_emscripten_should_drop_iter(void);
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/**
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* Block until a vsync interval, if vsync is enabled.
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* PROXY_TO_PTHREAD only.
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*/
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void platform_emscripten_wait_for_frame(void);
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/**
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* Enter a loop that blocks the main loop function.
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* !PROXY_TO_PTHREAD only.
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*
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* @param ms Milliseconds between iterations.
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* Use 1 for balanced performance and CPU usage.
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*/
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void platform_emscripten_enter_fake_block(int ms);
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/**
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* Exit the main loop blocking function.
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* !PROXY_TO_PTHREAD only.
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*/
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void platform_emscripten_exit_fake_block(void);
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/**
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* Set the vsync interval for the main loop.
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*
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* @param interval Vsync interval to set.
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* Use 0 to disable vsync.
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*/
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void platform_emscripten_set_main_loop_interval(int interval);
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#endif
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