RetroArch/gfx/ext.c
Themaister 44c52ca4f8 Add -pedantic for shits 'n giggles.
Fix portability issues with void* -> void (*)(void) casts.
Use a more ... bizarre technique ;)
2011-05-31 15:03:59 +02:00

315 lines
7.8 KiB
C

/* SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
* Copyright (C) 2010-2011 - Hans-Kristian Arntzen
*
* Some code herein may be based on code found in BSNES.
*
* SSNES 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.
*
* SSNES 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 SSNES.
* If not, see <http://www.gnu.org/licenses/>.
*/
// Loader for external API plugins.
#define SSNES_DLL_IMPORT
#include "ext/ssnes_video.h"
#include <stdbool.h>
#include <stdlib.h>
#include <stdint.h>
#include "dynamic.h"
#include "general.h"
static bool g_input_dead = true;
static bool g_video_dead = true;
static dylib_t g_lib = NULL;
/////////// Input hook
typedef struct
{
const ssnes_input_driver_t *driver;
void *handle;
} input_ext_t;
static void* input_ext_init(void)
{
g_input_dead = false;
return calloc(1, sizeof(input_ext_t));
}
static void input_ext_poll(void *data)
{
input_ext_t *ext = data;
ext->driver->poll(ext->handle);
}
static int16_t input_ext_input_state(void *data, const struct snes_keybind **snes_keybinds, bool port, unsigned device, unsigned index, unsigned id)
{
input_ext_t *ext = data;
unsigned player = 0;
if (device == SNES_DEVICE_MULTITAP)
player = (port == SNES_PORT_1) ? 1 : index + 2;
else
player = (port == SNES_PORT_1) ? 1 : 2;
const struct snes_keybind *ssnes_bind = NULL;
for (unsigned i = 0; g_settings.input.binds[player - 1][i].id != -1; i++)
{
if (g_settings.input.binds[player - 1][i].id == id)
{
ssnes_bind = &g_settings.input.binds[player - 1][i];
break;
}
}
if (ssnes_bind)
{
struct ssnes_keybind bind = {
.key = ssnes_bind->key,
.joykey = ssnes_bind->joykey,
.joyaxis = ssnes_bind->joyaxis
};
return ext->driver->input_state(ext->handle, &bind, player);
}
else
return 0;
}
static bool input_ext_key_pressed(void *data, int key)
{
input_ext_t *ext = data;
const struct snes_keybind *ssnes_bind = NULL;
for (unsigned i = 0; g_settings.input.binds[0][i].id != -1; i++)
{
if (g_settings.input.binds[0][i].id == key)
{
ssnes_bind = &g_settings.input.binds[0][i];
break;
}
}
if (ssnes_bind)
{
struct ssnes_keybind bind = {
.key = ssnes_bind->key,
.joykey = ssnes_bind->joykey,
.joyaxis = ssnes_bind->joyaxis
};
return ext->driver->input_state(ext->handle, &bind, 1);
}
else
return false;
}
static void input_ext_free(void *data)
{
input_ext_t *ext = data;
if (ext)
{
if (ext->driver && ext->handle)
ext->driver->free(ext->handle);
if (g_video_dead)
{
dylib_close(g_lib);
g_lib = NULL;
}
g_input_dead = true;
free(ext);
}
}
static const input_driver_t input_ext = {
.init = input_ext_init,
.poll = input_ext_poll,
.input_state = input_ext_input_state,
.key_pressed = input_ext_key_pressed,
.free = input_ext_free,
.ident = "ext"
};
//////////// Video hook
typedef struct
{
const ssnes_video_driver_t *driver;
void *handle;
} ext_t;
static void video_ext_free(void *data)
{
ext_t *ext = data;
if (ext)
{
if (ext->driver && ext->handle)
ext->driver->free(ext->handle);
if (g_input_dead)
{
dylib_close(g_lib);
g_lib = NULL;
}
g_video_dead = true;
free(ext);
}
}
static bool video_ext_focus(void *data)
{
ext_t *ext = data;
return ext->driver->focus(ext->handle);
}
static bool video_ext_alive(void *data)
{
ext_t *ext = data;
return ext->driver->alive(ext->handle);
}
static void video_ext_set_nonblock_state(void *data, bool state)
{
ext_t *ext = data;
ext->driver->set_nonblock_state(ext->handle, state);
}
static bool video_ext_frame(void *data, const void *frame, unsigned width, unsigned height, unsigned pitch, const char *msg)
{
ext_t *ext = data;
return ext->driver->frame(ext->handle, frame, width, height, pitch, msg);
}
static void* setup_input(ext_t *ext, const ssnes_input_driver_t *driver)
{
int joypad_index[5];
for (unsigned i = 0; i < 5; i++)
joypad_index[i] = g_settings.input.joypad_map[i] == SSNES_NO_JOYPAD ? -1 : g_settings.input.joypad_map[i];
void *handle = driver->init(joypad_index, g_settings.input.axis_threshold);
if (!handle)
return NULL;
input_ext_t *wrap_handle = input_ext.init();
if (!wrap_handle)
return NULL;
wrap_handle->handle = handle;
wrap_handle->driver = driver;
return wrap_handle;
}
static bool setup_video(ext_t *ext, const video_info_t *video, const input_driver_t **input, void **input_data)
{
SSNES_LOG("Loaded driver: \"%s\"\n", ext->driver->ident ? ext->driver->ident : "Unknown");
if (SSNES_GRAPHICS_API_VERSION != ext->driver->api_version)
{
SSNES_ERR("API version mismatch detected!\n");
SSNES_ERR("Required API version: %d, Library version: %d\n", SSNES_GRAPHICS_API_VERSION, ext->driver->api_version);
return false;
}
ssnes_video_info_t info = {
.width = video->width,
.height = video->height,
.fullscreen = video->fullscreen,
.vsync = video->vsync,
.force_aspect = video->force_aspect,
.aspect_ratio = g_settings.video.aspect_ratio,
.smooth = video->smooth,
.input_scale = video->input_scale,
.color_format = video->rgb32 ? SSNES_COLOR_FORMAT_ARGB8888 : SSNES_COLOR_FORMAT_XRGB1555,
.xml_shader = g_settings.video.bsnes_shader_path,
.cg_shader = g_settings.video.cg_shader_path,
.ttf_font = *g_settings.video.font_path ? g_settings.video.font_path : NULL,
.ttf_font_size = g_settings.video.font_size
};
const ssnes_input_driver_t *input_driver = NULL;
ext->handle = ext->driver->init(&info, &input_driver);
if (!ext->handle)
return false;
*input = input_driver ? &input_ext : NULL;
if (input_driver)
*input_data = setup_input(ext, input_driver);
else
*input_data = NULL;
return true;
}
static void* video_ext_init(const video_info_t *video, const input_driver_t **input, void **input_data)
{
ext_t *ext = calloc(1, sizeof(*ext));
if (!ext)
return NULL;
if (!(*g_settings.video.external_driver))
{
SSNES_ERR("External driver needs video_external_driver path to be set!\n");
goto error;
}
g_lib = dylib_load(g_settings.video.external_driver);
if (!g_lib)
{
SSNES_ERR("Failed to open library: \"%s\"\n", g_settings.video.external_driver);
goto error;
}
const ssnes_video_driver_t* (*video_init)(void) =
(const ssnes_video_driver_t *(*)(void))dylib_proc(g_lib, "ssnes_video_init");
if (!video_init)
{
SSNES_ERR("Couldn't find function ssnes_video_init in library ...\n");
goto error;
}
ext->driver = video_init();
if (!ext->driver)
{
SSNES_ERR("External driver returned invalid driver handle.\n");
goto error;
}
if (!setup_video(ext, video, input, input_data))
{
SSNES_ERR("Failed to start driver.\n");
goto error;
}
g_video_dead = false;
return ext;
error:
video_ext_free(ext);
return NULL;
}
const video_driver_t video_ext = {
.init = video_ext_init,
.frame = video_ext_frame,
.alive = video_ext_alive,
.set_nonblock_state = video_ext_set_nonblock_state,
.focus = video_ext_focus,
.free = video_ext_free,
.ident = "ext"
};