mirror of
https://github.com/libretro/RetroArch.git
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62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2013 - Hans-Kristian Arntzen
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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 INPUT_OVERLAY_H__
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#define INPUT_OVERLAY_H__
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#include "../boolean.h"
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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// Overlay driver acts as a medium between input drivers and video driver.
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// Coordinates are fetched from input driver, and an overlay with pressable actions are
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// displayed on-screen.
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//
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// This interface requires that the video driver has support for the overlay interface.
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typedef struct input_overlay input_overlay_t;
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input_overlay_t *input_overlay_new(const char *overlay);
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void input_overlay_free(input_overlay_t *ol);
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void input_overlay_enable(input_overlay_t *ol, bool enable);
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bool input_overlay_full_screen(input_overlay_t *ol);
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// norm_x and norm_y are the result of input_translate_coord_viewport().
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// Resulting state is a bitmask of (1 << key_bind_id).
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uint64_t input_overlay_poll(input_overlay_t *ol, int16_t norm_x, int16_t norm_y);
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// Call when there is nothing to poll. Allows overlay to clear certain state.
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void input_overlay_poll_clear(input_overlay_t *ol);
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// Sets a modulating factor for alpha channel. Default is 1.0.
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// The alpha factor is applied for all overlays.
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void input_overlay_set_alpha_mod(input_overlay_t *ol, float mod);
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// Scales the overlay by a factor of scale.
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void input_overlay_set_scale_factor(input_overlay_t *ol, float scale);
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void input_overlay_next(input_overlay_t *ol);
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#ifdef __cplusplus
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}
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#endif
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#endif
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