mirror of
https://github.com/libretro/RetroArch.git
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76 lines
2.7 KiB
C
76 lines
2.7 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - 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 "../libretro.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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typedef struct input_overlay_state
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{
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uint64_t buttons; // This is a bitmask of (1 << key_bind_id).
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int16_t analog[4]; // Left X, Left Y, Right X, Right Y
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uint32_t keys[RETROK_LAST / 32 + 1];
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} input_overlay_state_t;
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#define OVERLAY_GET_KEY(state, key) (((state)->keys[(key) / 32] >> ((key) % 32)) & 1)
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#define OVERLAY_SET_KEY(state, key) (state)->keys[(key) / 32] |= 1 << ((key) % 32)
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#define OVERLAY_CLEAR_KEY(state, key) (state)->keys[(key) / 32] &= ~(1 << ((key) % 32))
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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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void input_overlay_poll(input_overlay_t *ol, input_overlay_state_t *out, int16_t norm_x, int16_t norm_y);
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// called after all the input_overlay_poll calls to update the range modifiers for pressed/unpressed regions and alpha mods
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void input_overlay_post_poll(input_overlay_t *ol);
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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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