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RetroArch/input/overlay.c

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2013 - Hans-Kristian Arntzen
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include "overlay.h"
#include "../general.h"
#include "../driver.h"
#include "../libretro.h"
#include "../gfx/image.h"
#include "../conf/config_file.h"
#include "../compat/posix_string.h"
#include "input_common.h"
#include "../file.h"
#include <stddef.h>
#include <math.h>
enum overlay_hitbox
{
OVERLAY_HITBOX_RADIAL = 0,
OVERLAY_HITBOX_RECT
};
enum overlay_type
{
OVERLAY_TYPE_BUTTONS = 0,
OVERLAY_TYPE_ANALOG_LEFT,
OVERLAY_TYPE_ANALOG_RIGHT
};
struct overlay_desc
{
float x;
float y;
enum overlay_hitbox hitbox;
float range_x, range_y;
enum overlay_type type;
uint64_t key_mask;
float analog_saturate_pct;
unsigned next_index;
char next_index_name[64];
};
struct overlay
{
struct overlay_desc *descs;
size_t size;
uint32_t *image;
unsigned width;
unsigned height;
bool block_scale;
float mod_x, mod_y, mod_w, mod_h;
float x, y, w, h;
float scale;
float center_x, center_y;
bool full_screen;
char name[64];
};
struct input_overlay
{
void *iface_data;
const video_overlay_interface_t *iface;
bool enable;
bool blocked;
struct overlay *overlays;
const struct overlay *active;
size_t index;
size_t size;
unsigned next_index;
};
struct str_to_bind_map
{
const char *str;
unsigned bind;
};
static const struct str_to_bind_map str_to_bind[] = {
{ "b", RETRO_DEVICE_ID_JOYPAD_B },
{ "y", RETRO_DEVICE_ID_JOYPAD_Y },
{ "select", RETRO_DEVICE_ID_JOYPAD_SELECT },
{ "start", RETRO_DEVICE_ID_JOYPAD_START },
{ "up", RETRO_DEVICE_ID_JOYPAD_UP },
{ "down", RETRO_DEVICE_ID_JOYPAD_DOWN },
{ "left", RETRO_DEVICE_ID_JOYPAD_LEFT },
{ "right", RETRO_DEVICE_ID_JOYPAD_RIGHT },
{ "a", RETRO_DEVICE_ID_JOYPAD_A },
{ "x", RETRO_DEVICE_ID_JOYPAD_X },
{ "l", RETRO_DEVICE_ID_JOYPAD_L },
{ "r", RETRO_DEVICE_ID_JOYPAD_R },
{ "l2", RETRO_DEVICE_ID_JOYPAD_L2 },
{ "r2", RETRO_DEVICE_ID_JOYPAD_R2 },
{ "l3", RETRO_DEVICE_ID_JOYPAD_L3 },
{ "r3", RETRO_DEVICE_ID_JOYPAD_R3 },
{ "turbo", RARCH_TURBO_ENABLE },
{ "l_x_plus", RARCH_ANALOG_LEFT_X_PLUS },
{ "l_x_minus", RARCH_ANALOG_LEFT_X_MINUS },
{ "l_y_plus", RARCH_ANALOG_LEFT_Y_PLUS },
{ "l_y_minus", RARCH_ANALOG_LEFT_Y_MINUS },
{ "r_x_plus", RARCH_ANALOG_RIGHT_X_PLUS },
{ "r_x_minus", RARCH_ANALOG_RIGHT_X_MINUS },
{ "r_y_plus", RARCH_ANALOG_RIGHT_Y_PLUS },
{ "r_y_minus", RARCH_ANALOG_RIGHT_Y_MINUS },
{ "toggle_fast_forward", RARCH_FAST_FORWARD_KEY },
{ "hold_fast_forward", RARCH_FAST_FORWARD_HOLD_KEY },
{ "load_state", RARCH_LOAD_STATE_KEY },
{ "save_state", RARCH_SAVE_STATE_KEY },
{ "toggle_fullscreen", RARCH_FULLSCREEN_TOGGLE_KEY },
{ "exit_emulator", RARCH_QUIT_KEY },
{ "state_slot_increase", RARCH_STATE_SLOT_PLUS },
{ "state_slot_decrease", RARCH_STATE_SLOT_MINUS },
{ "rewind", RARCH_REWIND },
{ "movie_record_toggle", RARCH_MOVIE_RECORD_TOGGLE },
{ "pause_toggle", RARCH_PAUSE_TOGGLE },
{ "frame_advance", RARCH_FRAMEADVANCE },
{ "reset", RARCH_RESET },
{ "shader_next", RARCH_SHADER_NEXT },
{ "shader_prev", RARCH_SHADER_PREV },
{ "cheat_index_plus", RARCH_CHEAT_INDEX_PLUS },
{ "cheat_index_minus", RARCH_CHEAT_INDEX_MINUS },
{ "cheat_toggle", RARCH_CHEAT_TOGGLE },
{ "screenshot", RARCH_SCREENSHOT },
{ "dsp_config", RARCH_DSP_CONFIG },
{ "audio_mute", RARCH_MUTE },
{ "netplay_flip_players", RARCH_NETPLAY_FLIP },
{ "slowmotion", RARCH_SLOWMOTION },
{ "enable_hotkey", RARCH_ENABLE_HOTKEY },
{ "volume_up", RARCH_VOLUME_UP },
{ "volume_down", RARCH_VOLUME_DOWN },
{ "overlay_next", RARCH_OVERLAY_NEXT },
{ "disk_eject_toggle", RARCH_DISK_EJECT_TOGGLE },
{ "disk_next", RARCH_DISK_NEXT },
{ "grab_mouse_toggle", RARCH_GRAB_MOUSE_TOGGLE },
{ "menu_toggle", RARCH_MENU_TOGGLE },
};
static unsigned input_str_to_bind(const char *str)
{
for (unsigned i = 0; i < ARRAY_SIZE(str_to_bind); i++)
{
if (!strcmp(str_to_bind[i].str, str))
return str_to_bind[i].bind;
}
return RARCH_BIND_LIST_END;
}
static void input_overlay_scale(struct overlay *overlay, float scale)
{
if (overlay->block_scale)
{
overlay->mod_x = overlay->x;
overlay->mod_y = overlay->y;
overlay->mod_w = overlay->w;
overlay->mod_h = overlay->h;
}
else
{
overlay->scale = scale;
overlay->mod_w = overlay->w * scale;
overlay->mod_h = overlay->h * scale;
overlay->mod_x = overlay->center_x + (overlay->x - overlay->center_x) * scale;
overlay->mod_y = overlay->center_y + (overlay->y - overlay->center_y) * scale;
}
}
void input_overlay_set_scale_factor(input_overlay_t *ol, float scale)
{
for (size_t i = 0; i < ol->size; i++)
input_overlay_scale(&ol->overlays[i], scale);
ol->iface->vertex_geom(ol->iface_data,
ol->active->mod_x, ol->active->mod_y, ol->active->mod_w, ol->active->mod_h);
}
static void input_overlay_free_overlay(struct overlay *overlay)
{
free(overlay->descs);
free(overlay->image);
}
static void input_overlay_free_overlays(input_overlay_t *ol)
{
for (size_t i = 0; i < ol->size; i++)
input_overlay_free_overlay(&ol->overlays[i]);
free(ol->overlays);
}
static bool input_overlay_load_desc(config_file_t *conf, struct overlay_desc *desc,
unsigned ol_index, unsigned desc_index,
unsigned width, unsigned height)
{
bool ret = true;
char overlay_desc_key[64];
snprintf(overlay_desc_key, sizeof(overlay_desc_key), "overlay%u_desc%u", ol_index, desc_index);
char overlay[256];
if (!config_get_array(conf, overlay_desc_key, overlay, sizeof(overlay)))
{
RARCH_ERR("[Overlay]: Didn't find key: %s.\n", overlay_desc_key);
return false;
}
struct string_list *list = string_split(overlay, ", ");
if (!list)
{
RARCH_ERR("[Overlay]: Failed to split overlay desc.\n");
return false;
}
if (list->size < 6)
{
string_list_free(list);
RARCH_ERR("[Overlay]: Overlay desc is invalid. Requires at least 6 tokens.\n");
return false;
}
const char *x = list->elems[1].data;
const char *y = list->elems[2].data;
const char *box = list->elems[3].data;
char *key = list->elems[0].data;
char *save;
desc->key_mask = 0;
if (strcmp(key, "analog_left") == 0)
desc->type = OVERLAY_TYPE_ANALOG_LEFT;
else if (strcmp(key, "analog_right") == 0)
desc->type = OVERLAY_TYPE_ANALOG_RIGHT;
else
{
desc->type = OVERLAY_TYPE_BUTTONS;
for (const char *tmp = strtok_r(key, "|", &save); tmp; tmp = strtok_r(NULL, "|", &save))
desc->key_mask |= UINT64_C(1) << input_str_to_bind(tmp);
if (desc->key_mask & (UINT64_C(1) << RARCH_OVERLAY_NEXT))
{
char overlay_target_key[64];
snprintf(overlay_target_key, sizeof(overlay_target_key), "overlay%u_desc%u_next_target", ol_index, desc_index);
config_get_array(conf, overlay_target_key, desc->next_index_name, sizeof(desc->next_index_name));
}
}
desc->x = strtod(x, NULL) / width;
desc->y = strtod(y, NULL) / height;
if (!strcmp(box, "radial"))
desc->hitbox = OVERLAY_HITBOX_RADIAL;
else if (!strcmp(box, "rect"))
desc->hitbox = OVERLAY_HITBOX_RECT;
else
{
RARCH_ERR("[Overlay]: Hitbox type (%s) is invalid. Use \"radial\" or \"rect\".\n", box);
ret = false;
goto end;
}
if (desc->type != OVERLAY_TYPE_BUTTONS)
{
if (desc->hitbox != OVERLAY_HITBOX_RADIAL)
{
RARCH_ERR("[Overlay]: Analog hitbox type must be \"radial\".\n");
ret = false;
goto end;
}
char overlay_analog_saturate_key[64];
snprintf(overlay_analog_saturate_key, sizeof(overlay_analog_saturate_key), "overlay%u_desc%u_saturate_pct", ol_index, desc_index);
if (!config_get_float(conf, overlay_analog_saturate_key, &desc->analog_saturate_pct))
desc->analog_saturate_pct = 1.0f;
}
desc->range_x = strtod(list->elems[4].data, NULL) / width;
desc->range_y = strtod(list->elems[5].data, NULL) / height;
end:
if (list)
string_list_free(list);
return ret;
}
static bool input_overlay_load_overlay(config_file_t *conf, const char *config_path,
struct overlay *overlay, unsigned index)
{
char overlay_path_key[64];
char overlay_name_key[64];
char overlay_path[PATH_MAX];
char overlay_resolved_path[PATH_MAX];
snprintf(overlay_path_key, sizeof(overlay_path_key), "overlay%u_overlay", index);
if (!config_get_path(conf, overlay_path_key, overlay_path, sizeof(overlay_path)))
{
RARCH_ERR("[Overlay]: Config key: %s is not set.\n", overlay_path_key);
return false;
}
snprintf(overlay_name_key, sizeof(overlay_name_key), "overlay%u_name", index);
config_get_array(conf, overlay_name_key, overlay->name, sizeof(overlay->name));
fill_pathname_resolve_relative(overlay_resolved_path, config_path,
overlay_path, sizeof(overlay_resolved_path));
struct texture_image img = {0};
if (!texture_image_load(overlay_resolved_path, &img))
{
RARCH_ERR("Failed to load image: %s.\n", overlay_path);
return false;
}
overlay->image = img.pixels;
overlay->width = img.width;
overlay->height = img.height;
// By default, we stretch the overlay out in full.
overlay->x = overlay->y = 0.0f;
overlay->w = overlay->h = 1.0f;
char overlay_rect_key[64];
snprintf(overlay_rect_key, sizeof(overlay_rect_key), "overlay%u_rect", index);
char overlay_rect[256];
if (config_get_array(conf, overlay_rect_key, overlay_rect, sizeof(overlay_rect)))
{
struct string_list *list = string_split(overlay_rect, ", ");
if (list->size < 4)
{
RARCH_ERR("[Overlay]: Failed to split rect \"%s\" into at least four tokens.\n", overlay_rect);
return false;
}
overlay->x = strtod(list->elems[0].data, NULL);
overlay->y = strtod(list->elems[1].data, NULL);
overlay->w = strtod(list->elems[2].data, NULL);
overlay->h = strtod(list->elems[3].data, NULL);
string_list_free(list);
}
char overlay_full_screen_key[64];
snprintf(overlay_full_screen_key, sizeof(overlay_full_screen_key),
"overlay%u_full_screen", index);
overlay->full_screen = false;
config_get_bool(conf, overlay_full_screen_key, &overlay->full_screen);
char overlay_descs_key[64];
snprintf(overlay_descs_key, sizeof(overlay_descs_key), "overlay%u_descs", index);
unsigned descs = 0;
if (!config_get_uint(conf, overlay_descs_key, &descs))
{
RARCH_ERR("[Overlay]: Failed to read number of descs from config key: %s.\n", overlay_descs_key);
return false;
}
overlay->descs = (struct overlay_desc*)calloc(descs, sizeof(*overlay->descs));
if (!overlay->descs)
{
RARCH_ERR("[Overlay]: Failed to allocate descs.\n");
return false;
}
overlay->size = descs;
for (size_t i = 0; i < overlay->size; i++)
{
if (!input_overlay_load_desc(conf, &overlay->descs[i], index, i, img.width, img.height))
{
RARCH_ERR("[Overlay]: Failed to load overlay descs for overlay #%u.\n", (unsigned)i);
return false;
}
}
// Assume for now that scaling center is in the middle.
// TODO: Make this configurable.
overlay->block_scale = false;
overlay->center_x = overlay->x + 0.5f * overlay->w;
overlay->center_y = overlay->y + 0.5f * overlay->h;
return true;
}
static ssize_t input_overlay_find_index(const struct overlay *ol, const char *name, size_t size)
{
for (size_t i = 0; i < size; i++)
{
if (strcmp(ol[i].name, name) == 0)
return i;
}
return -1;
}
static bool input_overlay_resolve_targets(struct overlay *ol, size_t index, size_t size)
{
struct overlay *current = &ol[index];
for (size_t i = 0; i < current->size; i++)
{
const char *next = current->descs[i].next_index_name;
if (*next)
{
ssize_t index = input_overlay_find_index(ol, next, size);
if (index < 0)
{
RARCH_ERR("[Overlay]: Couldn't find overlay called: \"%s\".\n", next);
return false;
}
current->descs[i].next_index = index;
}
else
current->descs[i].next_index = (index + 1) % size;
}
return true;
}
static bool input_overlay_load_overlays(input_overlay_t *ol, const char *path)
{
bool ret = true;
config_file_t *conf = config_file_new(path);
if (!conf)
{
RARCH_ERR("Failed to load config file: %s.\n", path);
return false;
}
unsigned overlays = 0;
if (!config_get_uint(conf, "overlays", &overlays))
{
RARCH_ERR("overlays variable not defined in config.\n");
ret = false;
goto end;
}
if (!overlays)
{
ret = false;
goto end;
}
ol->overlays = (struct overlay*)calloc(overlays, sizeof(*ol->overlays));
if (!ol->overlays)
{
ret = false;
goto end;
}
ol->size = overlays;
for (size_t i = 0; i < ol->size; i++)
{
if (!input_overlay_load_overlay(conf, path, &ol->overlays[i], i))
{
RARCH_ERR("[Overlay]: Failed to load overlay #%u.\n", (unsigned)i);
ret = false;
goto end;
}
}
for (size_t i = 0; i < ol->size; i++)
{
if (!input_overlay_resolve_targets(ol->overlays, i, ol->size))
{
RARCH_ERR("[Overlay]: Failed to resolve next targets.\n");
ret = false;
goto end;
}
}
end:
config_file_free(conf);
return ret;
}
input_overlay_t *input_overlay_new(const char *overlay)
{
input_overlay_t *ol = (input_overlay_t*)calloc(1, sizeof(*ol));
if (!ol)
goto error;
if (!driver.video->overlay_interface)
{
RARCH_ERR("Overlay interface is not present in video driver.\n");
goto error;
}
video_overlay_interface_func(&ol->iface);
ol->iface_data = driver.video_data;
if (!ol->iface)
goto error;
if (!input_overlay_load_overlays(ol, overlay))
goto error;
ol->active = &ol->overlays[0];
ol->iface->load(ol->iface_data, ol->active->image, ol->active->width, ol->active->height);
ol->iface->vertex_geom(ol->iface_data,
ol->active->mod_x, ol->active->mod_y, ol->active->mod_w, ol->active->mod_h);
ol->iface->full_screen(ol->iface_data, ol->active->full_screen);
ol->iface->enable(ol->iface_data, true);
ol->enable = true;
input_overlay_set_alpha_mod(ol, g_settings.input.overlay_opacity);
input_overlay_set_scale_factor(ol, 1.0f);
ol->next_index = (ol->index + 1) % ol->size;
return ol;
error:
input_overlay_free(ol);
return NULL;
}
void input_overlay_enable(input_overlay_t *ol, bool enable)
{
ol->enable = enable;
ol->iface->enable(ol->iface_data, enable);
}
static bool inside_hitbox(const struct overlay_desc *desc, float x, float y)
{
switch (desc->hitbox)
{
case OVERLAY_HITBOX_RADIAL:
{
// Ellipsis.
float x_dist = (x - desc->x) / desc->range_x;
float y_dist = (y - desc->y) / desc->range_y;
float sq_dist = x_dist * x_dist + y_dist * y_dist;
return sq_dist <= 1.0f;
}
case OVERLAY_HITBOX_RECT:
return (fabs(x - desc->x) <= desc->range_x) &&
(fabs(y - desc->y) <= desc->range_y);
default:
return false;
}
}
void input_overlay_poll(input_overlay_t *ol, input_overlay_state_t *out, int16_t norm_x, int16_t norm_y)
{
memset(out, 0, sizeof(*out));
if (!ol->enable)
{
ol->blocked = false;
return;
}
// norm_x and norm_y is in [-0x7fff, 0x7fff] range, like RETRO_DEVICE_POINTER.
float x = (float)(norm_x + 0x7fff) / 0xffff;
float y = (float)(norm_y + 0x7fff) / 0xffff;
x -= ol->active->mod_x;
y -= ol->active->mod_y;
x /= ol->active->mod_w;
y /= ol->active->mod_h;
for (size_t i = 0; i < ol->active->size; i++)
{
if (!inside_hitbox(&ol->active->descs[i], x, y))
continue;
if (ol->active->descs[i].type == OVERLAY_TYPE_BUTTONS)
{
uint64_t mask = ol->active->descs[i].key_mask;
out->buttons |= mask;
if (mask & (UINT64_C(1) << RARCH_OVERLAY_NEXT))
ol->next_index = ol->active->descs[i].next_index;
}
else
{
float x_val = (x - ol->active->descs[i].x) / ol->active->descs[i].range_x / ol->active->descs[i].analog_saturate_pct;
float y_val = (y - ol->active->descs[i].y) / ol->active->descs[i].range_y / ol->active->descs[i].analog_saturate_pct;
if (fabs(x_val) > 1.0f)
x_val = (x_val > 0.0f) ? 1.0f : -1.0f;
if (fabs(y_val) > 1.0f)
y_val = (y_val > 0.0f) ? 1.0f : -1.0f;
unsigned int base = (ol->active->descs[i].type == OVERLAY_TYPE_ANALOG_RIGHT) ? 2 : 0;
out->analog[base + 0] = x_val * 32767.0f;
out->analog[base + 1] = y_val * 32767.0f;
}
}
if (!out->buttons)
ol->blocked = false;
else if (ol->blocked)
memset(out, 0, sizeof(*out));
}
void input_overlay_poll_clear(input_overlay_t *ol)
{
ol->blocked = false;
}
void input_overlay_next(input_overlay_t *ol)
{
ol->index = ol->next_index;
ol->active = &ol->overlays[ol->index];
ol->iface->load(ol->iface_data, ol->active->image, ol->active->width, ol->active->height);
ol->iface->vertex_geom(ol->iface_data,
ol->active->mod_x, ol->active->mod_y, ol->active->mod_w, ol->active->mod_h);
ol->iface->full_screen(ol->iface_data, ol->active->full_screen);
ol->blocked = true;
ol->next_index = (ol->index + 1) % ol->size;
}
bool input_overlay_full_screen(input_overlay_t *ol)
{
return ol->active->full_screen;
}
void input_overlay_free(input_overlay_t *ol)
{
if (!ol)
return;
input_overlay_free_overlays(ol);
if (ol->iface)
ol->iface->enable(ol->iface_data, false);
free(ol);
}
void input_overlay_set_alpha_mod(input_overlay_t *ol, float mod)
{
ol->iface->set_alpha(ol->iface_data, mod);
}
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