mirror of
https://github.com/libretro/RetroArch.git
synced 2024-11-25 00:49:47 +00:00
357 lines
8.7 KiB
C
357 lines
8.7 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2012 - 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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#include "overlay.h"
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#include "../general.h"
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#include "../driver.h"
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#include "../libretro.h"
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#include "../gfx/image.h"
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#include "../conf/config_file.h"
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#include "input_common.h"
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#include "../file.h"
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#include <stddef.h>
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#include <math.h>
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enum overlay_hitbox
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{
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OVERLAY_HITBOX_RADIAL = 0,
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OVERLAY_HITBOX_RECT
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};
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struct overlay_desc
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{
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float x;
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float y;
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enum overlay_hitbox hitbox;
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float range_x, range_y;
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unsigned key;
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};
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struct overlay
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{
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struct overlay_desc *descs;
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size_t size;
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uint32_t *image;
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unsigned width;
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unsigned height;
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float x, y, w, h;
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};
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struct input_overlay
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{
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void *iface_data;
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const video_overlay_interface_t *iface;
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bool enable;
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struct overlay *overlays;
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const struct overlay *active;
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size_t index;
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size_t size;
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};
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static void input_overlay_free_overlay(struct overlay *overlay)
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{
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free(overlay->descs);
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free(overlay->image);
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}
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static void input_overlay_free_overlays(input_overlay_t *ol)
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{
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for (size_t i = 0; i < ol->size; i++)
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input_overlay_free_overlay(&ol->overlays[i]);
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free(ol->overlays);
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}
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static bool input_overlay_load_desc(config_file_t *conf, struct overlay_desc *desc,
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unsigned ol_index, unsigned desc_index,
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unsigned width, unsigned height)
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{
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bool ret = true;
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char overlay_desc_key[64];
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snprintf(overlay_desc_key, sizeof(overlay_desc_key), "overlay%u_desc%u", ol_index, desc_index);
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char overlay[256];
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if (!config_get_array(conf, overlay_desc_key, overlay, sizeof(overlay)))
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return false;
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struct string_list *list = string_split(overlay, ", ");
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if (!list)
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return false;
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if (list->size < 6)
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{
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string_list_free(list);
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return false;
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}
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const char *key = list->elems[0].data;
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const char *x = list->elems[1].data;
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const char *y = list->elems[2].data;
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const char *box = list->elems[3].data;
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desc->key = input_str_to_bind(key);
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desc->x = strtod(x, NULL) / width;
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desc->y = strtod(y, NULL) / height;
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if (!strcmp(box, "radial"))
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desc->hitbox = OVERLAY_HITBOX_RADIAL;
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else if (!strcmp(box, "rect"))
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desc->hitbox = OVERLAY_HITBOX_RECT;
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else
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{
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ret = false;
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goto end;
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}
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desc->range_x = strtod(list->elems[4].data, NULL) / width;
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desc->range_y = strtod(list->elems[5].data, NULL) / height;
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end:
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if (list)
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string_list_free(list);
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return ret;
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}
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static bool input_overlay_load_overlay(config_file_t *conf, const char *config_path,
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struct overlay *overlay, unsigned index)
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{
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char overlay_path_key[64];
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char overlay_path[PATH_MAX];
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char overlay_resolved_path[PATH_MAX];
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snprintf(overlay_path_key, sizeof(overlay_path_key), "overlay%u_overlay", index);
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if (!config_get_path(conf, overlay_path_key, overlay_path, sizeof(overlay_path)))
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return false;
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fill_pathname_resolve_relative(overlay_resolved_path, config_path,
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overlay_path, sizeof(overlay_resolved_path));
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struct texture_image img = {0};
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if (!texture_image_load(overlay_resolved_path, &img))
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{
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RARCH_ERR("Failed to load image: %s.\n", overlay_path);
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return false;
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}
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overlay->image = img.pixels;
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overlay->width = img.width;
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overlay->height = img.height;
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// By default, we stretch the overlay out in full.
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overlay->x = overlay->y = 0.0f;
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overlay->w = overlay->h = 1.0f;
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char overlay_rect_key[64];
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snprintf(overlay_rect_key, sizeof(overlay_rect_key), "overlay%u_rect", index);
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char overlay_rect[256];
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if (config_get_array(conf, overlay_rect_key, overlay_rect, sizeof(overlay_rect)))
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{
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struct string_list *list = string_split(overlay_rect, ", ");
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if (list->size < 4)
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return false;
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overlay->x = strtod(list->elems[0].data, NULL);
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overlay->y = strtod(list->elems[1].data, NULL);
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overlay->w = strtod(list->elems[2].data, NULL);
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overlay->h = strtod(list->elems[3].data, NULL);
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string_list_free(list);
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}
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char overlay_descs_key[64];
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snprintf(overlay_descs_key, sizeof(overlay_descs_key), "overlay%u_descs", index);
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unsigned descs = 0;
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if (!config_get_uint(conf, overlay_descs_key, &descs))
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return false;
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overlay->descs = (struct overlay_desc*)calloc(descs, sizeof(*overlay->descs));
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if (!overlay->descs)
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return false;
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overlay->size = descs;
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for (size_t i = 0; i < overlay->size; i++)
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{
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if (!input_overlay_load_desc(conf, &overlay->descs[i], index, i, img.width, img.height))
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return false;
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}
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return true;
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}
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static bool input_overlay_load_overlays(input_overlay_t *ol, const char *path)
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{
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bool ret = true;
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config_file_t *conf = config_file_new(path);
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if (!conf)
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{
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RARCH_ERR("Failed to load config file: %s.\n", path);
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return false;
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}
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unsigned overlays = 0;
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if (!config_get_uint(conf, "overlays", &overlays))
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{
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RARCH_ERR("overlays variable not defined in config.\n");
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ret = false;
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goto end;
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}
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if (!overlays)
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{
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ret = false;
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goto end;
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}
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ol->overlays = (struct overlay*)calloc(overlays, sizeof(*ol->overlays));
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if (!ol->overlays)
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{
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ret = false;
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goto end;
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}
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ol->size = overlays;
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for (size_t i = 0; i < ol->size; i++)
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{
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if (!input_overlay_load_overlay(conf, path, &ol->overlays[i], i))
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{
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ret = false;
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goto end;
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}
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}
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end:
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config_file_free(conf);
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return ret;
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}
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input_overlay_t *input_overlay_new(const char *overlay)
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{
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input_overlay_t *ol = (input_overlay_t*)calloc(1, sizeof(*ol));
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if (!ol)
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goto error;
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if (!driver.video->overlay_interface)
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{
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RARCH_ERR("Overlay interface is not present in video driver.\n");
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goto error;
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}
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video_overlay_interface_func(&ol->iface);
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ol->iface_data = driver.video_data;
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if (!ol->iface)
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goto error;
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if (!input_overlay_load_overlays(ol, overlay))
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goto error;
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ol->active = &ol->overlays[0];
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ol->iface->load(ol->iface_data, ol->active->image, ol->active->width, ol->active->height);
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ol->iface->vertex_geom(ol->iface_data,
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ol->active->x, ol->active->y, ol->active->w, ol->active->h);
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ol->iface->enable(ol->iface_data, true);
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ol->enable = true;
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return ol;
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error:
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input_overlay_free(ol);
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return NULL;
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}
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void input_overlay_enable(input_overlay_t *ol, bool enable)
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{
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ol->enable = enable;
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ol->iface->enable(ol->iface_data, enable);
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}
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static bool inside_hitbox(const struct overlay_desc *desc, float x, float y)
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{
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switch (desc->hitbox)
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{
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case OVERLAY_HITBOX_RADIAL:
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{
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// Ellipsis.
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float x_dist = (x - desc->x) / desc->range_x;
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float y_dist = (y - desc->y) / desc->range_y;
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float sq_dist = x_dist * x_dist + y_dist * y_dist;
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return sq_dist <= 1.0f;
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}
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case OVERLAY_HITBOX_RECT:
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return (fabs(x - desc->x) <= desc->range_x) &&
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(fabs(y - desc->y) <= desc->range_y);
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default:
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return false;
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}
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}
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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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{
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if (!ol->enable)
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return 0;
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// norm_x and norm_y is in [-0x7fff, 0x7fff] range, like RETRO_DEVICE_POINTER.
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float x = (float)(norm_x + 0x7fff) / 0xffff;
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float y = (float)(norm_y + 0x7fff) / 0xffff;
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x -= ol->active->x;
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y -= ol->active->y;
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x /= ol->active->w;
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y /= ol->active->h;
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uint64_t state = 0;
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for (size_t i = 0; i < ol->active->size; i++)
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{
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if (inside_hitbox(&ol->active->descs[i], x, y))
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state |= UINT64_C(1) << ol->active->descs[i].key;
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}
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return state;
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}
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void input_overlay_next(input_overlay_t *ol)
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{
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ol->index = (ol->index + 1) % ol->size;
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ol->active = &ol->overlays[ol->index];
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ol->iface->load(ol->iface_data, ol->active->image, ol->active->width, ol->active->height);
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ol->iface->vertex_geom(ol->iface_data,
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ol->active->x, ol->active->y, ol->active->w, ol->active->h);
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}
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void input_overlay_free(input_overlay_t *ol)
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{
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if (!ol)
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return;
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input_overlay_free_overlays(ol);
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if (ol->iface)
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ol->iface->enable(ol->iface_data, false);
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free(ol);
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}
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