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snesrev
2023-03-05 07:03:54 +01:00
committed by Snesrev
commit 09c1bdd874
100 changed files with 142957 additions and 0 deletions
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>
#include <SDL.h>
#ifdef _WIN32
#include "platform/win32/volume_control.h"
#include <direct.h>
#else
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#endif
#include "snes/ppu.h"
#include "types.h"
#include "sm_rtl.h"
#include "sm_cpu_infra.h"
#include "config.h"
#include "util.h"
#include "spc_player.h"
static void playAudio(Snes *snes, SDL_AudioDeviceID device, int16_t *audioBuffer);
static void renderScreen(Snes *snes, SDL_Renderer *renderer, SDL_Texture *texture);
static void SDLCALL AudioCallback(void *userdata, Uint8 *stream, int len);
static void SwitchDirectory();
static void RenderNumber(uint8 *dst, size_t pitch, int n, uint8 big);
static void OpenOneGamepad(int i);
static void HandleVolumeAdjustment(int volume_adjustment);
static void HandleGamepadAxisInput(int gamepad_id, int axis, int value);
static int RemapSdlButton(int button);
static void HandleGamepadInput(int button, bool pressed);
static void HandleInput(int keyCode, int keyMod, bool pressed);
void OpenGLRenderer_Create(struct RendererFuncs *funcs);
bool g_is_turbo;
bool g_is_turbo;
bool g_want_dump_memmap_flags;
bool g_new_ppu;
bool g_new_ppu = true;
bool g_other_image;
struct SpcPlayer *g_spc_player;
static uint32_t button_state;
static uint8_t g_pixels[256 * 4 * 240];
static uint8_t g_my_pixels[256 * 4 * 240];
int g_got_mismatch_count;
enum {
kDefaultFullscreen = 0,
kMaxWindowScale = 10,
kDefaultFreq = 44100,
kDefaultChannels = 2,
kDefaultSamples = 2048,
};
static const char kWindowTitle[] = "SuperMet";
static uint32 g_win_flags = SDL_WINDOW_RESIZABLE;
static SDL_Window *g_window;
static uint8 g_paused, g_turbo, g_replay_turbo = true, g_cursor = true;
static uint8 g_current_window_scale;
static uint8 g_gamepad_buttons;
static int g_input1_state;
static bool g_display_perf;
static int g_curr_fps;
static int g_ppu_render_flags = 0;
static int g_snes_width, g_snes_height;
static int g_sdl_audio_mixer_volume = SDL_MIX_MAXVOLUME;
static struct RendererFuncs g_renderer_funcs;
static uint32 g_gamepad_modifiers;
static uint16 g_gamepad_last_cmd[kGamepadBtn_Count];
extern Snes *g_snes;
void NORETURN Die(const char *error) {
#if defined(NDEBUG) && defined(_WIN32)
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, kWindowTitle, error, NULL);
#endif
fprintf(stderr, "Error: %s\n", error);
exit(1);
}
void ChangeWindowScale(int scale_step) {
if ((SDL_GetWindowFlags(g_window) & (SDL_WINDOW_FULLSCREEN_DESKTOP | SDL_WINDOW_FULLSCREEN | SDL_WINDOW_MINIMIZED | SDL_WINDOW_MAXIMIZED)) != 0)
return;
int screen = SDL_GetWindowDisplayIndex(g_window);
if (screen < 0) screen = 0;
int max_scale = kMaxWindowScale;
SDL_Rect bounds;
int bt = -1, bl, bb, br;
// note this takes into effect Windows display scaling, i.e., resolution is divided by scale factor
if (SDL_GetDisplayUsableBounds(screen, &bounds) == 0) {
// this call may take a while before it is reported by Windows (or not at all in my testing)
if (SDL_GetWindowBordersSize(g_window, &bt, &bl, &bb, &br) != 0) {
// guess based on Windows 10/11 defaults
bl = br = bb = 1;
bt = 31;
}
// Allow a scale level slightly above the max that fits on screen
int mw = (bounds.w - bl - br + g_snes_width / 4) / g_snes_width;
int mh = (bounds.h - bt - bb + g_snes_height / 4) / g_snes_height;
max_scale = IntMin(mw, mh);
}
int new_scale = IntMax(IntMin(g_current_window_scale + scale_step, max_scale), 1);
g_current_window_scale = new_scale;
int w = new_scale * g_snes_width;
int h = new_scale * g_snes_height;
//SDL_RenderSetLogicalSize(g_renderer, w, h);
SDL_SetWindowSize(g_window, w, h);
if (bt >= 0) {
// Center the window on top of the mouse
int mx, my;
SDL_GetGlobalMouseState(&mx, &my);
int wx = IntMax(IntMin(mx - w / 2, bounds.x + bounds.w - bl - br - w), bounds.x + bl);
int wy = IntMax(IntMin(my - h / 2, bounds.y + bounds.h - bt - bb - h), bounds.y + bt);
SDL_SetWindowPosition(g_window, wx, wy);
} else {
SDL_SetWindowPosition(g_window, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED);
}
}
#define RESIZE_BORDER 20
static SDL_HitTestResult HitTestCallback(SDL_Window *win, const SDL_Point *pt, void *data) {
uint32 flags = SDL_GetWindowFlags(win);
if ((flags & SDL_WINDOW_FULLSCREEN_DESKTOP) != 0 || (flags & SDL_WINDOW_FULLSCREEN) != 0)
return SDL_HITTEST_NORMAL;
if ((SDL_GetModState() & KMOD_CTRL) != 0)
return SDL_HITTEST_DRAGGABLE;
int w, h;
SDL_GetWindowSize(win, &w, &h);
if (pt->y < RESIZE_BORDER) {
return (pt->x < RESIZE_BORDER) ? SDL_HITTEST_RESIZE_TOPLEFT :
(pt->x >= w - RESIZE_BORDER) ? SDL_HITTEST_RESIZE_TOPRIGHT : SDL_HITTEST_RESIZE_TOP;
} else if (pt->y >= h - RESIZE_BORDER) {
return (pt->x < RESIZE_BORDER) ? SDL_HITTEST_RESIZE_BOTTOMLEFT :
(pt->x >= w - RESIZE_BORDER) ? SDL_HITTEST_RESIZE_BOTTOMRIGHT : SDL_HITTEST_RESIZE_BOTTOM;
} else {
if (pt->x < RESIZE_BORDER) {
return SDL_HITTEST_RESIZE_LEFT;
} else if (pt->x >= w - RESIZE_BORDER) {
return SDL_HITTEST_RESIZE_RIGHT;
}
}
return SDL_HITTEST_NORMAL;
}
void RtlDrawPpuFrame(uint8 *pixel_buffer, size_t pitch, uint32 render_flags) {
uint8 *ppu_pixels = g_other_image ? g_my_pixels : g_pixels;
for (size_t y = 0; y < 240; y++)
memcpy((uint8_t *)pixel_buffer + y * pitch, ppu_pixels + y * 256 * 4, 256 * 4);
}
static void DrawPpuFrameWithPerf(void) {
int render_scale = PpuGetCurrentRenderScale(g_snes->ppu, g_ppu_render_flags);
uint8 *pixel_buffer = 0;
int pitch = 0;
g_renderer_funcs.BeginDraw(g_snes_width * render_scale,
g_snes_height * render_scale,
&pixel_buffer, &pitch);
if (g_display_perf || g_config.display_perf_title) {
static float history[64], average;
static int history_pos;
uint64 before = SDL_GetPerformanceCounter();
RtlDrawPpuFrame(pixel_buffer, pitch, g_ppu_render_flags);
uint64 after = SDL_GetPerformanceCounter();
float v = (double)SDL_GetPerformanceFrequency() / (after - before);
average += v - history[history_pos];
history[history_pos] = v;
history_pos = (history_pos + 1) & 63;
g_curr_fps = average * (1.0f / 64);
} else {
RtlDrawPpuFrame(pixel_buffer, pitch, g_ppu_render_flags);
}
if (g_display_perf)
RenderNumber(pixel_buffer + pitch * render_scale, pitch, g_curr_fps, render_scale == 4);
if (g_got_mismatch_count)
RenderNumber(pixel_buffer + pitch * render_scale, pitch, g_got_mismatch_count, render_scale == 4);
g_renderer_funcs.EndDraw();
}
static SDL_mutex *g_audio_mutex;
static uint8 *g_audiobuffer, *g_audiobuffer_cur, *g_audiobuffer_end;
static int g_frames_per_block;
static uint8 g_audio_channels;
static SDL_AudioDeviceID g_audio_device;
void RtlApuLock(void) {
SDL_LockMutex(g_audio_mutex);
}
void RtlApuUnlock(void) {
SDL_UnlockMutex(g_audio_mutex);
}
static void SDLCALL AudioCallback(void *userdata, Uint8 *stream, int len) {
if (SDL_LockMutex(g_audio_mutex)) Die("Mutex lock failed!");
while (len != 0) {
if (g_audiobuffer_end - g_audiobuffer_cur == 0) {
RtlRenderAudio((int16 *)g_audiobuffer, g_frames_per_block, g_audio_channels);
g_audiobuffer_cur = g_audiobuffer;
g_audiobuffer_end = g_audiobuffer + g_frames_per_block * g_audio_channels * sizeof(int16);
}
int n = IntMin(len, g_audiobuffer_end - g_audiobuffer_cur);
if (g_sdl_audio_mixer_volume == SDL_MIX_MAXVOLUME) {
memcpy(stream, g_audiobuffer_cur, n);
} else {
SDL_memset(stream, 0, n);
SDL_MixAudioFormat(stream, g_audiobuffer_cur, AUDIO_S16, n, g_sdl_audio_mixer_volume);
}
g_audiobuffer_cur += n;
stream += n;
len -= n;
}
SDL_UnlockMutex(g_audio_mutex);
}
// State for sdl renderer
static SDL_Renderer *g_renderer;
static SDL_Texture *g_texture;
static SDL_Rect g_sdl_renderer_rect;
static bool SdlRenderer_Init(SDL_Window *window) {
if (g_config.shader)
fprintf(stderr, "Warning: Shaders are supported only with the OpenGL backend\n");
SDL_Renderer *renderer = SDL_CreateRenderer(g_window, -1,
g_config.output_method == kOutputMethod_SDLSoftware ? SDL_RENDERER_SOFTWARE :
SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
if (renderer == NULL) {
printf("Failed to create renderer: %s\n", SDL_GetError());
return false;
}
SDL_RendererInfo renderer_info;
SDL_GetRendererInfo(renderer, &renderer_info);
if (kDebugFlag) {
printf("Supported texture formats:");
for (Uint32 i = 0; i < renderer_info.num_texture_formats; i++)
printf(" %s", SDL_GetPixelFormatName(renderer_info.texture_formats[i]));
printf("\n");
}
g_renderer = renderer;
if (!g_config.ignore_aspect_ratio)
SDL_RenderSetLogicalSize(renderer, g_snes_width, g_snes_height);
if (g_config.linear_filtering)
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "best");
int tex_mult = (g_ppu_render_flags & kPpuRenderFlags_4x4Mode7) ? 4 : 1;
g_texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING,
g_snes_width * tex_mult, g_snes_height * tex_mult);
if (g_texture == NULL) {
printf("Failed to create texture: %s\n", SDL_GetError());
return false;
}
return true;
}
static void SdlRenderer_Destroy(void) {
SDL_DestroyTexture(g_texture);
SDL_DestroyRenderer(g_renderer);
}
static void SdlRenderer_BeginDraw(int width, int height, uint8 **pixels, int *pitch) {
g_sdl_renderer_rect.w = width;
g_sdl_renderer_rect.h = height;
if (SDL_LockTexture(g_texture, &g_sdl_renderer_rect, (void **)pixels, pitch) != 0) {
printf("Failed to lock texture: %s\n", SDL_GetError());
return;
}
}
static void SdlRenderer_EndDraw(void) {
// uint64 before = SDL_GetPerformanceCounter();
SDL_UnlockTexture(g_texture);
// uint64 after = SDL_GetPerformanceCounter();
// float v = (double)(after - before) / SDL_GetPerformanceFrequency();
// printf("%f ms\n", v * 1000);
SDL_RenderClear(g_renderer);
SDL_RenderCopy(g_renderer, g_texture, &g_sdl_renderer_rect, NULL);
SDL_RenderPresent(g_renderer); // vsyncs to 60 FPS?
}
static const struct RendererFuncs kSdlRendererFuncs = {
&SdlRenderer_Init,
&SdlRenderer_Destroy,
&SdlRenderer_BeginDraw,
&SdlRenderer_EndDraw,
};
#undef main
int main(int argc, char** argv) {
argc--, argv++;
const char *config_file = NULL;
if (argc >= 2 && strcmp(argv[0], "--config") == 0) {
config_file = argv[1];
argc -= 2, argv += 2;
} else {
SwitchDirectory();
}
ParseConfigFile(config_file);
g_snes_width = (g_config.extended_aspect_ratio * 2 + 256);
g_snes_height = 240;// (g_config.extend_y ? 240 : 224);
g_ppu_render_flags = g_config.new_renderer * kPpuRenderFlags_NewRenderer |
g_config.enhanced_mode7 * kPpuRenderFlags_4x4Mode7 |
g_config.extend_y * kPpuRenderFlags_Height240 |
g_config.no_sprite_limits * kPpuRenderFlags_NoSpriteLimits;
if (g_config.fullscreen == 1)
g_win_flags ^= SDL_WINDOW_FULLSCREEN_DESKTOP;
else if (g_config.fullscreen == 2)
g_win_flags ^= SDL_WINDOW_FULLSCREEN;
// Window scale (1=100%, 2=200%, 3=300%, etc.)
g_current_window_scale = (g_config.window_scale == 0) ? 2 : IntMin(g_config.window_scale, kMaxWindowScale);
// audio_freq: Use common sampling rates (see user config file. values higher than 48000 are not supported.)
if (g_config.audio_freq < 11025 || g_config.audio_freq > 48000)
g_config.audio_freq = kDefaultFreq;
// Currently, the SPC/DSP implementation only supports up to stereo.
if (g_config.audio_channels < 1 || g_config.audio_channels > 2)
g_config.audio_channels = kDefaultChannels;
// audio_samples: power of 2
if (g_config.audio_samples <= 0 || ((g_config.audio_samples & (g_config.audio_samples - 1)) != 0))
g_config.audio_samples = kDefaultSamples;
// set up SDL
if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_GAMECONTROLLER) != 0) {
printf("Failed to init SDL: %s\n", SDL_GetError());
return 1;
}
bool custom_size = g_config.window_width != 0 && g_config.window_height != 0;
int window_width = custom_size ? g_config.window_width : g_current_window_scale * g_snes_width;
int window_height = custom_size ? g_config.window_height : g_current_window_scale * g_snes_height;
if (g_config.output_method == kOutputMethod_OpenGL) {
g_win_flags |= SDL_WINDOW_OPENGL;
OpenGLRenderer_Create(&g_renderer_funcs);
} else {
g_renderer_funcs = kSdlRendererFuncs;
}
SDL_Window *window = SDL_CreateWindow(kWindowTitle, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, window_width, window_height, g_win_flags);
if(window == NULL) {
printf("Failed to create window: %s\n", SDL_GetError());
return 1;
}
g_window = window;
SDL_SetWindowHitTest(window, HitTestCallback, NULL);
if (!g_renderer_funcs.Initialize(window))
return 1;
g_audio_mutex = SDL_CreateMutex();
if (!g_audio_mutex) Die("No mutex");
g_spc_player = SpcPlayer_Create();
SpcPlayer_Initialize(g_spc_player);
bool enable_audio = true;
if (enable_audio) {
SDL_AudioSpec want = { 0 }, have;
want.freq = 44100;
want.format = AUDIO_S16;
want.channels = 2;
want.samples = 2048;
want.callback = &AudioCallback;
g_audio_device = SDL_OpenAudioDevice(NULL, 0, &want, &have, 0);
if (g_audio_device == 0) {
printf("Failed to open audio device: %s\n", SDL_GetError());
return 1;
}
g_audio_channels = 2;
g_frames_per_block = (534 * have.freq) / 32000;
g_audiobuffer = (uint8 *)malloc(g_frames_per_block * have.channels * sizeof(int16));
}
// init snes, load rom
Snes *snes = SnesInit(argv[0] ? argv[0] : "sm.smc");
PpuBeginDrawing(snes->snes_ppu, g_pixels, 256 * 4, 0);
PpuBeginDrawing(snes->my_ppu, g_my_pixels, 256 * 4, 0);
#if defined(_WIN32)
_mkdir("saves");
#else
mkdir("saves", 0755);
#endif
RtlReadSram();
for (int i = 0; i < SDL_NumJoysticks(); i++)
OpenOneGamepad(i);
bool running = true;
uint32 lastTick = SDL_GetTicks();
uint32 curTick = 0;
uint32 frameCtr = 0;
uint8 audiopaused = true;
bool has_bug_in_title = false;
while (running) {
SDL_Event event;
while (SDL_PollEvent(&event)) {
switch (event.type) {
case SDL_CONTROLLERDEVICEADDED:
OpenOneGamepad(event.cdevice.which);
break;
case SDL_CONTROLLERAXISMOTION:
HandleGamepadAxisInput(event.caxis.which, event.caxis.axis, event.caxis.value);
break;
case SDL_CONTROLLERBUTTONDOWN:
case SDL_CONTROLLERBUTTONUP: {
int b = RemapSdlButton(event.cbutton.button);
if (b >= 0)
HandleGamepadInput(b, event.type == SDL_CONTROLLERBUTTONDOWN);
break;
}
case SDL_MOUSEWHEEL:
if (SDL_GetModState() & KMOD_CTRL && event.wheel.y != 0)
ChangeWindowScale(event.wheel.y > 0 ? 1 : -1);
break;
case SDL_MOUSEBUTTONDOWN:
if (event.button.button == SDL_BUTTON_LEFT && event.button.state == SDL_PRESSED && event.button.clicks == 2) {
if ((g_win_flags & SDL_WINDOW_FULLSCREEN_DESKTOP) == 0 && (g_win_flags & SDL_WINDOW_FULLSCREEN) == 0 && SDL_GetModState() & KMOD_SHIFT) {
g_win_flags ^= SDL_WINDOW_BORDERLESS;
SDL_SetWindowBordered(g_window, (g_win_flags & SDL_WINDOW_BORDERLESS) == 0 ? SDL_TRUE : SDL_FALSE);
}
}
break;
case SDL_KEYDOWN:
HandleInput(event.key.keysym.sym, event.key.keysym.mod, true);
break;
case SDL_KEYUP:
HandleInput(event.key.keysym.sym, event.key.keysym.mod, false);
break;
case SDL_QUIT:
running = false;
break;
}
}
if (g_paused != audiopaused) {
audiopaused = g_paused;
if (g_audio_device)
SDL_PauseAudioDevice(g_audio_device, audiopaused);
}
if (g_paused) {
SDL_Delay(16);
continue;
}
// Clear gamepad inputs when joypad directional inputs to avoid wonkiness
int inputs = g_input1_state;
if (g_input1_state & 0xf0)
g_gamepad_buttons = 0;
inputs |= g_gamepad_buttons;
uint8 is_replay = RtlRunFrame(inputs);
frameCtr++;
g_snes->disableRender = (g_turbo ^ (is_replay & g_replay_turbo)) && (frameCtr & (g_turbo ? 0xf : 0x7f)) != 0;
if (!g_snes->disableRender)
DrawPpuFrameWithPerf();
bool want_bug_in_title = (g_got_mismatch_count != 0);
if (want_bug_in_title != has_bug_in_title) {
has_bug_in_title = want_bug_in_title;
char title[60];
if (want_bug_in_title) {
snprintf(title, sizeof(title), "%s | BUG FOUND!", kWindowTitle);
SDL_SetWindowTitle(g_window, title);
} else {
SDL_SetWindowTitle(g_window, kWindowTitle);
}
}
// if vsync isn't working, delay manually
curTick = SDL_GetTicks();
if (!g_snes->disableRender && !g_config.disable_frame_delay) {
static const uint8 delays[3] = { 17, 17, 16 }; // 60 fps
lastTick += delays[frameCtr % 3];
if (lastTick > curTick) {
uint32 delta = lastTick - curTick;
if (delta > 500) {
lastTick = curTick - 500;
delta = 500;
}
// printf("Sleeping %d\n", delta);
SDL_Delay(delta);
} else if (curTick - lastTick > 500) {
lastTick = curTick;
}
}
}
// clean sdl
SDL_PauseAudioDevice(g_audio_device, 1);
SDL_CloseAudioDevice(g_audio_device);
SDL_DestroyMutex(g_audio_mutex);
free(g_audiobuffer);
g_renderer_funcs.Destroy();
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}
static void RenderDigit(uint8 *dst, size_t pitch, int digit, uint32 color, bool big) {
static const uint8 kFont[] = {
0x1c, 0x36, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x36, 0x1c,
0x18, 0x1c, 0x1e, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x7e,
0x3e, 0x63, 0x60, 0x30, 0x18, 0x0c, 0x06, 0x03, 0x63, 0x7f,
0x3e, 0x63, 0x60, 0x60, 0x3c, 0x60, 0x60, 0x60, 0x63, 0x3e,
0x30, 0x38, 0x3c, 0x36, 0x33, 0x7f, 0x30, 0x30, 0x30, 0x78,
0x7f, 0x03, 0x03, 0x03, 0x3f, 0x60, 0x60, 0x60, 0x63, 0x3e,
0x1c, 0x06, 0x03, 0x03, 0x3f, 0x63, 0x63, 0x63, 0x63, 0x3e,
0x7f, 0x63, 0x60, 0x60, 0x30, 0x18, 0x0c, 0x0c, 0x0c, 0x0c,
0x3e, 0x63, 0x63, 0x63, 0x3e, 0x63, 0x63, 0x63, 0x63, 0x3e,
0x3e, 0x63, 0x63, 0x63, 0x7e, 0x60, 0x60, 0x60, 0x30, 0x1e,
};
const uint8 *p = kFont + digit * 10;
if (!big) {
for (int y = 0; y < 10; y++, dst += pitch) {
int v = *p++;
for (int x = 0; v; x++, v >>= 1) {
if (v & 1)
((uint32 *)dst)[x] = color;
}
}
} else {
for (int y = 0; y < 10; y++, dst += pitch * 2) {
int v = *p++;
for (int x = 0; v; x++, v >>= 1) {
if (v & 1) {
((uint32 *)dst)[x * 2 + 1] = ((uint32 *)dst)[x * 2] = color;
((uint32 *)(dst + pitch))[x * 2 + 1] = ((uint32 *)(dst + pitch))[x * 2] = color;
}
}
}
}
}
static void RenderNumber(uint8 *dst, size_t pitch, int n, uint8 big) {
char buf[32], *s;
int i;
sprintf(buf, "%d", n);
for (s = buf, i = 2 * 4; *s; s++, i += 8 * 4)
RenderDigit(dst + ((pitch + i + 4) << big), pitch, *s - '0', 0x404040, big);
for (s = buf, i = 2 * 4; *s; s++, i += 8 * 4)
RenderDigit(dst + (i << big), pitch, *s - '0', 0xffffff, big);
}
static void HandleCommand_Locked(uint32 j, bool pressed);
static void HandleCommand(uint32 j, bool pressed) {
if (j <= kKeys_Controls_Last) {
static const uint8 kKbdRemap[] = { 0, 4, 5, 6, 7, 2, 3, 8, 0, 9, 1, 10, 11 };
if (pressed)
g_input1_state |= 1 << kKbdRemap[j];
else
g_input1_state &= ~(1 << kKbdRemap[j]);
return;
}
if (j == kKeys_Turbo) {
g_turbo = pressed;
return;
}
if (!pressed)
return;
if (j <= kKeys_Load_Last) {
RtlSaveLoad(kSaveLoad_Load, j - kKeys_Load);
} else if (j <= kKeys_Save_Last) {
RtlSaveLoad(kSaveLoad_Save, j - kKeys_Save);
} else if (j <= kKeys_Replay_Last) {
RtlSaveLoad(kSaveLoad_Replay, j - kKeys_Replay);
} else if (j <= kKeys_LoadRef_Last) {
RtlSaveLoad(kSaveLoad_Load, 256 + j - kKeys_LoadRef);
} else if (j <= kKeys_ReplayRef_Last) {
RtlSaveLoad(kSaveLoad_Replay, 256 + j - kKeys_ReplayRef);
} else {
switch (j) {
case kKeys_CheatLife: RtlCheat('w'); break;
case kKeys_CheatJump: RtlCheat('q'); break;
case kKeys_ToggleWhichFrame:
g_other_image = !g_other_image;
break;
case kKeys_ClearKeyLog: RtlClearKeyLog(); break;
case kKeys_StopReplay: RtlStopReplay(); break;
case kKeys_Fullscreen:
g_win_flags ^= SDL_WINDOW_FULLSCREEN_DESKTOP;
SDL_SetWindowFullscreen(g_window, g_win_flags & SDL_WINDOW_FULLSCREEN_DESKTOP);
g_cursor = !g_cursor;
SDL_ShowCursor(g_cursor);
break;
case kKeys_Reset:
//RtlReset(true);
break;
case kKeys_Pause: g_paused = !g_paused; break;
case kKeys_PauseDimmed:
g_paused = !g_paused;
// SDL_RenderPresent may not be called more than once per frame.
// Seems to work on Windows still. Temporary measure until it's fixed.
#ifdef _WIN32
if (g_paused) {
SDL_SetRenderDrawBlendMode(g_renderer, SDL_BLENDMODE_BLEND);
SDL_SetRenderDrawColor(g_renderer, 0, 0, 0, 159);
SDL_RenderFillRect(g_renderer, NULL);
SDL_RenderPresent(g_renderer);
}
#endif
break;
case kKeys_ReplayTurbo: g_replay_turbo = !g_replay_turbo; break;
case kKeys_WindowBigger: ChangeWindowScale(1); break;
case kKeys_WindowSmaller: ChangeWindowScale(-1); break;
case kKeys_DisplayPerf: g_display_perf ^= 1; break;
case kKeys_ToggleRenderer:
g_ppu_render_flags ^= kPpuRenderFlags_NewRenderer;
g_new_ppu = (g_ppu_render_flags & kPpuRenderFlags_NewRenderer) != 0;
break;
case kKeys_VolumeUp:
case kKeys_VolumeDown: HandleVolumeAdjustment(j == kKeys_VolumeUp ? 1 : -1); break;
default: assert(0);
}
}
}
static void HandleInput(int keyCode, int keyMod, bool pressed) {
int j = FindCmdForSdlKey(keyCode, (SDL_Keymod)keyMod);
if (j != 0)
HandleCommand(j, pressed);
}
static void OpenOneGamepad(int i) {
if (SDL_IsGameController(i)) {
SDL_GameController *controller = SDL_GameControllerOpen(i);
if (!controller)
fprintf(stderr, "Could not open gamepad %d: %s\n", i, SDL_GetError());
}
}
static int RemapSdlButton(int button) {
switch (button) {
case SDL_CONTROLLER_BUTTON_A: return kGamepadBtn_A;
case SDL_CONTROLLER_BUTTON_B: return kGamepadBtn_B;
case SDL_CONTROLLER_BUTTON_X: return kGamepadBtn_X;
case SDL_CONTROLLER_BUTTON_Y: return kGamepadBtn_Y;
case SDL_CONTROLLER_BUTTON_BACK: return kGamepadBtn_Back;
case SDL_CONTROLLER_BUTTON_GUIDE: return kGamepadBtn_Guide;
case SDL_CONTROLLER_BUTTON_START: return kGamepadBtn_Start;
case SDL_CONTROLLER_BUTTON_LEFTSTICK: return kGamepadBtn_L3;
case SDL_CONTROLLER_BUTTON_RIGHTSTICK: return kGamepadBtn_R3;
case SDL_CONTROLLER_BUTTON_LEFTSHOULDER: return kGamepadBtn_L1;
case SDL_CONTROLLER_BUTTON_RIGHTSHOULDER: return kGamepadBtn_R1;
case SDL_CONTROLLER_BUTTON_DPAD_UP: return kGamepadBtn_DpadUp;
case SDL_CONTROLLER_BUTTON_DPAD_DOWN: return kGamepadBtn_DpadDown;
case SDL_CONTROLLER_BUTTON_DPAD_LEFT: return kGamepadBtn_DpadLeft;
case SDL_CONTROLLER_BUTTON_DPAD_RIGHT: return kGamepadBtn_DpadRight;
default: return -1;
}
}
static void HandleGamepadInput(int button, bool pressed) {
if (!!(g_gamepad_modifiers & (1 << button)) == pressed)
return;
g_gamepad_modifiers ^= 1 << button;
if (pressed)
g_gamepad_last_cmd[button] = FindCmdForGamepadButton(button, g_gamepad_modifiers);
if (g_gamepad_last_cmd[button] != 0)
HandleCommand(g_gamepad_last_cmd[button], pressed);
}
static void HandleVolumeAdjustment(int volume_adjustment) {
#if SYSTEM_VOLUME_MIXER_AVAILABLE
int current_volume = GetApplicationVolume();
int new_volume = IntMin(IntMax(0, current_volume + volume_adjustment * 5), 100);
SetApplicationVolume(new_volume);
printf("[System Volume]=%i\n", new_volume);
#else
g_sdl_audio_mixer_volume = IntMin(IntMax(0, g_sdl_audio_mixer_volume + volume_adjustment * (SDL_MIX_MAXVOLUME >> 4)), SDL_MIX_MAXVOLUME);
printf("[SDL mixer volume]=%i\n", g_sdl_audio_mixer_volume);
#endif
}
// Approximates atan2(y, x) normalized to the [0,4) range
// with a maximum error of 0.1620 degrees
// normalized_atan(x) ~ (b x + x^2) / (1 + 2 b x + x^2)
static float ApproximateAtan2(float y, float x) {
uint32 sign_mask = 0x80000000;
float b = 0.596227f;
// Extract the sign bits
uint32 ux_s = sign_mask & *(uint32 *)&x;
uint32 uy_s = sign_mask & *(uint32 *)&y;
// Determine the quadrant offset
float q = (float)((~ux_s & uy_s) >> 29 | ux_s >> 30);
// Calculate the arctangent in the first quadrant
float bxy_a = b * x * y;
if (bxy_a < 0.0f) bxy_a = -bxy_a; // avoid fabs
float num = bxy_a + y * y;
float atan_1q = num / (x * x + bxy_a + num + 0.000001f);
// Translate it to the proper quadrant
uint32_t uatan_2q = (ux_s ^ uy_s) | *(uint32 *)&atan_1q;
return q + *(float *)&uatan_2q;
}
static void HandleGamepadAxisInput(int gamepad_id, int axis, int value) {
static int last_gamepad_id, last_x, last_y;
if (axis == SDL_CONTROLLER_AXIS_LEFTX || axis == SDL_CONTROLLER_AXIS_LEFTY) {
// ignore other gamepads unless they have a big input
if (last_gamepad_id != gamepad_id) {
if (value > -16000 && value < 16000)
return;
last_gamepad_id = gamepad_id;
last_x = last_y = 0;
}
*(axis == SDL_CONTROLLER_AXIS_LEFTX ? &last_x : &last_y) = value;
int buttons = 0;
if (last_x * last_x + last_y * last_y >= 10000 * 10000) {
// in the non deadzone part, divide the circle into eight 45 degree
// segments rotated by 22.5 degrees that control which direction to move.
// todo: do this without floats?
static const uint8 kSegmentToButtons[8] = {
1 << 4, // 0 = up
1 << 4 | 1 << 7, // 1 = up, right
1 << 7, // 2 = right
1 << 7 | 1 << 5, // 3 = right, down
1 << 5, // 4 = down
1 << 5 | 1 << 6, // 5 = down, left
1 << 6, // 6 = left
1 << 6 | 1 << 4, // 7 = left, up
};
uint8 angle = (uint8)(int)(ApproximateAtan2(last_y, last_x) * 64.0f + 0.5f);
buttons = kSegmentToButtons[(uint8)(angle + 16 + 64) >> 5];
}
g_gamepad_buttons = buttons;
} else if ((axis == SDL_CONTROLLER_AXIS_TRIGGERLEFT || axis == SDL_CONTROLLER_AXIS_TRIGGERRIGHT)) {
if (value < 12000 || value >= 16000) // hysteresis
HandleGamepadInput(axis == SDL_CONTROLLER_AXIS_TRIGGERLEFT ? kGamepadBtn_L2 : kGamepadBtn_R2, value >= 12000);
}
}
// Go some steps up and find sm.ini
static void SwitchDirectory(void) {
char buf[4096];
if (!getcwd(buf, sizeof(buf) - 32))
return;
size_t pos = strlen(buf);
for (int step = 0; pos != 0 && step < 3; step++) {
memcpy(buf + pos, "/sm.ini", 8);
FILE *f = fopen(buf, "rb");
if (f) {
fclose(f);
buf[pos] = 0;
if (step != 0) {
printf("Found sm.ini in %s\n", buf);
int err = chdir(buf);
(void)err;
}
return;
}
pos--;
while (pos != 0 && buf[pos] != '/' && buf[pos] != '\\')
pos--;
}
}