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VVVVVV/desktop_version/libretro/SDL_libretro.c
宋文武 e2eccdb216 add libretro port
2024-10-12 21:40:56 +08:00

330 lines
9.7 KiB
C
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#include "SDL_libretro.h"
#include "../../third_party/SDL/src/audio/SDL_sysaudio.h"
#include "../../third_party/SDL/src/events/SDL_keyboard_c.h"
#include "../../third_party/SDL/src/video/SDL_sysvideo.h"
static SDL_Surface* _surface = NULL;
static SDL_Surface* _surface_real = NULL;
static SDL_AudioDevice* _audio = NULL;
static int
VideoInit(SDL_VideoDevice* device)
{
SDL_DisplayMode mode;
SDL_zero(mode);
mode.format = SDL_PIXELFORMAT_RGB888;
mode.w = 320;
mode.h = 240;
mode.refresh_rate = 60;
mode.driverdata = NULL;
SDL_AddBasicVideoDisplay(&mode);
return 0;
}
static void
VideoQuit(SDL_VideoDevice* device)
{
}
static void
VideoFree(SDL_VideoDevice* device)
{
SDL_free(device);
}
static void
PumpEvents(SDL_VideoDevice* device)
{
}
void
DestroyWindowFramebuffer(SDL_VideoDevice* device, SDL_Window* window)
{
if (_surface != NULL) {
SDL_FreeSurface(_surface);
_surface = NULL;
}
if (_surface_real != NULL) {
SDL_FreeSurface(_surface_real);
_surface_real = NULL;
}
}
int
CreateWindowFramebuffer(SDL_VideoDevice* device,
SDL_Window* window,
Uint32* format,
void** pixels,
int* pitch)
{
const Uint32 surface_format = SDL_PIXELFORMAT_RGB888;
int w, h;
/* Free the old framebuffer surface */
DestroyWindowFramebuffer(device, window);
/* Create a new one */
SDL_GetWindowSizeInPixels(window, &w, &h);
_surface = SDL_CreateRGBSurfaceWithFormat(0, w, h, 0, surface_format);
_surface_real = SDL_CreateRGBSurfaceWithFormat(0, w, h, 0, surface_format);
if (!_surface_real) {
return -1;
}
/* Save the info and return! */
*format = surface_format;
*pixels = _surface->pixels;
*pitch = _surface->pitch;
return 0;
}
int
UpdateWindowFramebuffer(SDL_VideoDevice* device,
SDL_Window* window,
const SDL_Rect* rects,
int numrects)
{
for (int i = 0; i < numrects; i += 1) {
SDL_BlitSurface(_surface, (SDL_Rect*)&rects[i], _surface_real, (SDL_Rect*)&rects[i]);
}
return 0;
}
static SDL_VideoDevice*
VideoCreate(void)
{
SDL_VideoDevice* device = SDL_malloc(sizeof(SDL_VideoDevice));
if (device == NULL) {
SDL_OutOfMemory();
return NULL;
}
SDL_zerop(device);
device->is_dummy = SDL_FALSE;
device->VideoInit = VideoInit;
device->VideoQuit = VideoQuit;
device->PumpEvents = PumpEvents;
device->CreateWindowFramebuffer = CreateWindowFramebuffer;
device->UpdateWindowFramebuffer = UpdateWindowFramebuffer;
device->DestroyWindowFramebuffer = DestroyWindowFramebuffer;
device->free = VideoFree;
return device;
}
VideoBootStrap DUMMY_bootstrap = {
"libretro",
"SDL libretro video driver",
VideoCreate,
NULL,
};
static int
AudioOpen(SDL_AudioDevice* device, const char* devname)
{
device->hidden = (void*)0x1;
device->spec.freq = 44100;
device->spec.format = AUDIO_S16SYS;
device->spec.channels = 2;
device->spec.silence = 0;
device->spec.samples = 44100 / 60;
SDL_CalculateAudioSpec(&device->spec);
_audio = device;
return 0;
}
static void
AudioClose(SDL_AudioDevice* device)
{
_audio = NULL;
}
static SDL_bool
AudioInit(SDL_AudioDriverImpl* impl)
{
impl->OpenDevice = AudioOpen;
impl->CloseDevice = AudioClose;
impl->HasCaptureSupport = SDL_FALSE;
impl->AllowsArbitraryDeviceNames = SDL_TRUE;
impl->ProvidesOwnCallbackThread = SDL_TRUE;
impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
impl->SupportsNonPow2Samples = SDL_TRUE;
return SDL_TRUE;
}
AudioBootStrap DUMMYAUDIO_bootstrap = { "libretro",
"SDL libretro audio driver",
AudioInit,
SDL_FALSE };
void
SDL_libretro_RefreshVideo(retro_video_refresh_t video_cb)
{
if (_surface_real == NULL)
return;
video_cb(_surface_real->pixels,
_surface_real->w,
_surface_real->h,
_surface_real->pitch);
}
void
SDL_libretro_ProduceAudio(retro_audio_sample_batch_t audio_batch_cb)
{
if (_audio == NULL)
return;
while (SDL_AudioStreamAvailable(_audio->stream) < _audio->spec.size) {
_audio->callbackspec.callback(_audio->callbackspec.userdata,
_audio->work_buffer,
_audio->callbackspec.size);
SDL_AudioStreamPut(_audio->stream, _audio->work_buffer, _audio->callbackspec.size);
}
SDL_AudioStreamGet(_audio->stream, _audio->work_buffer, _audio->spec.size);
audio_batch_cb((const int16_t *)_audio->work_buffer, _audio->spec.samples);
}
void
SDL_libretro_KeyboardCallback(bool down,
unsigned keycode,
uint32_t character,
uint16_t key_modifiers)
{
static const SDL_Keycode keycodes[RETROK_LAST] = {
[RETROK_UNKNOWN] = SDLK_UNKNOWN,
[RETROK_BACKSPACE] = SDLK_BACKSPACE,
[RETROK_TAB] = SDLK_TAB,
[RETROK_CLEAR] = SDLK_CLEAR,
[RETROK_RETURN] = SDLK_RETURN,
[RETROK_PAUSE] = SDLK_PAUSE,
[RETROK_ESCAPE] = SDLK_ESCAPE,
[RETROK_SPACE] = SDLK_SPACE,
[RETROK_EXCLAIM] = SDLK_EXCLAIM,
[RETROK_QUOTEDBL] = SDLK_QUOTEDBL,
[RETROK_HASH] = SDLK_HASH,
[RETROK_DOLLAR] = SDLK_DOLLAR,
[RETROK_AMPERSAND] = SDLK_AMPERSAND,
[RETROK_QUOTE] = SDLK_QUOTE,
[RETROK_LEFTPAREN] = SDLK_LEFTPAREN,
[RETROK_RIGHTPAREN] = SDLK_RIGHTPAREN,
[RETROK_ASTERISK] = SDLK_ASTERISK,
[RETROK_PLUS] = SDLK_PLUS,
[RETROK_COMMA] = SDLK_COMMA,
[RETROK_MINUS] = SDLK_MINUS,
[RETROK_PERIOD] = SDLK_PERIOD,
[RETROK_SLASH] = SDLK_SLASH,
[RETROK_0] = SDLK_0,
[RETROK_1] = SDLK_1,
[RETROK_2] = SDLK_2,
[RETROK_3] = SDLK_3,
[RETROK_4] = SDLK_4,
[RETROK_5] = SDLK_5,
[RETROK_6] = SDLK_6,
[RETROK_7] = SDLK_7,
[RETROK_8] = SDLK_8,
[RETROK_9] = SDLK_9,
[RETROK_COLON] = SDLK_COLON,
[RETROK_SEMICOLON] = SDLK_SEMICOLON,
[RETROK_LESS] = SDLK_LESS,
[RETROK_EQUALS] = SDLK_EQUALS,
[RETROK_GREATER] = SDLK_GREATER,
[RETROK_QUESTION] = SDLK_QUESTION,
[RETROK_AT] = SDLK_AT,
[RETROK_LEFTBRACKET] = SDLK_LEFTBRACKET,
[RETROK_BACKSLASH] = SDLK_BACKSLASH,
[RETROK_RIGHTBRACKET] = SDLK_RIGHTBRACKET,
[RETROK_CARET] = SDLK_CARET,
[RETROK_UNDERSCORE] = SDLK_UNDERSCORE,
[RETROK_BACKQUOTE] = SDLK_BACKQUOTE,
[RETROK_a] = SDLK_a,
[RETROK_b] = SDLK_b,
[RETROK_c] = SDLK_c,
[RETROK_d] = SDLK_d,
[RETROK_e] = SDLK_e,
[RETROK_f] = SDLK_f,
[RETROK_g] = SDLK_g,
[RETROK_h] = SDLK_h,
[RETROK_i] = SDLK_i,
[RETROK_j] = SDLK_j,
[RETROK_k] = SDLK_k,
[RETROK_l] = SDLK_l,
[RETROK_m] = SDLK_m,
[RETROK_n] = SDLK_n,
[RETROK_o] = SDLK_o,
[RETROK_p] = SDLK_p,
[RETROK_q] = SDLK_q,
[RETROK_r] = SDLK_r,
[RETROK_s] = SDLK_s,
[RETROK_t] = SDLK_t,
[RETROK_u] = SDLK_u,
[RETROK_v] = SDLK_v,
[RETROK_w] = SDLK_w,
[RETROK_x] = SDLK_x,
[RETROK_y] = SDLK_y,
[RETROK_z] = SDLK_z,
[RETROK_DELETE] = SDLK_DELETE,
[RETROK_KP0] = SDLK_KP_0,
[RETROK_KP1] = SDLK_KP_1,
[RETROK_KP2] = SDLK_KP_2,
[RETROK_KP3] = SDLK_KP_3,
[RETROK_KP4] = SDLK_KP_4,
[RETROK_KP5] = SDLK_KP_5,
[RETROK_KP6] = SDLK_KP_6,
[RETROK_KP7] = SDLK_KP_7,
[RETROK_KP8] = SDLK_KP_8,
[RETROK_KP9] = SDLK_KP_9,
[RETROK_KP_PERIOD] = SDLK_KP_PERIOD,
[RETROK_KP_DIVIDE] = SDLK_KP_DIVIDE,
[RETROK_KP_MULTIPLY] = SDLK_KP_MULTIPLY,
[RETROK_KP_MINUS] = SDLK_KP_MINUS,
[RETROK_KP_PLUS] = SDLK_KP_PLUS,
[RETROK_KP_ENTER] = SDLK_KP_ENTER,
[RETROK_KP_EQUALS] = SDLK_KP_EQUALS,
[RETROK_UP] = SDLK_UP,
[RETROK_DOWN] = SDLK_DOWN,
[RETROK_RIGHT] = SDLK_RIGHT,
[RETROK_LEFT] = SDLK_LEFT,
[RETROK_INSERT] = SDLK_INSERT,
[RETROK_HOME] = SDLK_HOME,
[RETROK_END] = SDLK_END,
[RETROK_PAGEUP] = SDLK_PAGEUP,
[RETROK_PAGEDOWN] = SDLK_PAGEDOWN,
[RETROK_F1] = SDLK_F1,
[RETROK_F2] = SDLK_F2,
[RETROK_F3] = SDLK_F3,
[RETROK_F4] = SDLK_F4,
[RETROK_F5] = SDLK_F5,
[RETROK_F6] = SDLK_F6,
[RETROK_F7] = SDLK_F7,
[RETROK_F8] = SDLK_F8,
[RETROK_F9] = SDLK_F9,
[RETROK_F10] = SDLK_F10,
[RETROK_F11] = SDLK_F11,
[RETROK_F12] = SDLK_F12,
[RETROK_F13] = SDLK_F13,
[RETROK_F14] = SDLK_F14,
[RETROK_F15] = SDLK_F15,
[RETROK_NUMLOCK] = SDLK_NUMLOCKCLEAR,
[RETROK_CAPSLOCK] = SDLK_CAPSLOCK,
[RETROK_SCROLLOCK] = SDLK_SCROLLLOCK,
[RETROK_RSHIFT] = SDLK_RSHIFT,
[RETROK_LSHIFT] = SDLK_LSHIFT,
[RETROK_RCTRL] = SDLK_RCTRL,
[RETROK_LCTRL] = SDLK_LCTRL,
[RETROK_RALT] = SDLK_RALT,
[RETROK_LALT] = SDLK_LALT,
[RETROK_LSUPER] = SDLK_LGUI,
[RETROK_RSUPER] = SDLK_RGUI,
[RETROK_MODE] = SDLK_MODE,
[RETROK_HELP] = SDLK_HELP,
[RETROK_PRINT] = SDLK_PRINTSCREEN,
[RETROK_SYSREQ] = SDLK_SYSREQ,
[RETROK_BREAK] = SDLK_PAUSE,
[RETROK_MENU] = SDLK_MENU,
[RETROK_POWER] = SDLK_POWER,
[RETROK_UNDO] = SDLK_UNDO,
[RETROK_OEM_102] = SDLK_LESS,
};
SDL_Scancode scancode = SDL_GetScancodeFromKey(keycodes[keycode]);
SDL_SendKeyboardKey(down ? SDL_PRESSED : SDL_RELEASED, scancode);
}
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