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example.py
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example.py
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import sys, os
os.environ["PYSDL3_ENABLE_INSTANCE_TRACKING"] = "1"
os.environ["PYSDL3_ENABLE_FORCE_CLOSE"] = "1"
import sdl3, ctypes, colorsys, time
def countLines() -> int:
lines = 0
for i in os.listdir("sdl3"):
if i.endswith(".py"):
with open(f"sdl3/{i}", "r") as file:
lines += file.read().count("\n") + 1
return lines
def main(argv: list[str]) -> int:
print(f"total lines of code: {countLines()}.")
print(f"loaded {sum(len(v) for k, v in sdl3.functions.items())} functions.")
if not sdl3.SDL_Init(sdl3.SDL_INIT_VIDEO | sdl3.SDL_INIT_EVENTS | sdl3.SDL_INIT_TIMER | sdl3.SDL_INIT_AUDIO):
print(f"failed to initialize library: {sdl3.SDL_GetError().decode().lower()}.")
return -1
window = sdl3.SDL_CreateWindow("Aermoss".encode(), 1200, 600, sdl3.SDL_WINDOW_RESIZABLE)
renderDrivers = [sdl3.SDL_GetRenderDriver(i).decode() for i in range(sdl3.SDL_GetNumRenderDrivers())]
tryGetDriver, tryUseVulkan = lambda order, drivers: next((i for i in order if i in drivers), None), False
renderDriver = tryGetDriver((["vulkan"] if tryUseVulkan else []) + ["opengl", "software"], renderDrivers)
print(f"available render drivers: {', '.join(renderDrivers)}. (current: {renderDriver})")
renderer = sdl3.SDL_CreateRenderer(window, renderDriver.encode())
if not renderer:
print(f"failed to create renderer: {sdl3.SDL_GetError().decode().lower()}.")
return -1
audioDrivers = [sdl3.SDL_GetAudioDriver(i).decode() for i in range(sdl3.SDL_GetNumAudioDrivers())]
print(f"available audio drivers: {', '.join(audioDrivers)}. (current: {sdl3.SDL_GetCurrentAudioDriver().decode().lower()})")
audioDevices = sdl3.SDL_GetAudioPlaybackDevices(None)
if not audioDevices:
print(f"failed to get audio devices: {sdl3.SDL_GetError().decode().lower()}.")
return -1
currentAudioDevice = sdl3.SDL_OpenAudioDevice(audioDevices[0], None)
if currentAudioDevice:
print(f"current audio device: {sdl3.SDL_GetAudioDeviceName(currentAudioDevice).decode().lower()}.")
sdl3.IMG_Init(sdl3.IMG_INIT_JPG | sdl3.IMG_INIT_PNG)
surface = sdl3.IMG_Load("res/example.png".encode())
texture = sdl3.SDL_CreateTextureFromSurface(renderer, surface)
rect = sdl3.SDL_Rect()
sdl3.SDL_GetSurfaceClipRect(surface, ctypes.byref(rect))
frect = sdl3.SDL_FRect()
sdl3.SDL_RectToFRect(ctypes.byref(rect), ctypes.byref(frect))
running, hue, lastTime, scale = True, 0.0, time.time(), 0.75
sdl3.TTF_Init()
font = sdl3.TTF_OpenFont("res/example.ttf".encode(), 32)
if currentAudioDevice:
sdl3.Mix_Init(sdl3.MIX_INIT_WAVPACK)
audioSpec = sdl3.SDL_AudioSpec()
sdl3.Mix_OpenAudio(currentAudioDevice, ctypes.byref(audioSpec))
chunks = [sdl3.Mix_LoadWAV(f"res/voice/{i}".encode()) for i in os.listdir("res/voice")]
currentIndex, channel = 0, 0
frames, frameCooldown = 0.0, 1.0
textTexture, textFRect = None, sdl3.SDL_FRect()
sinceLastFrame = frameCooldown
event = sdl3.SDL_Event()
while running:
while sdl3.SDL_PollEvent(ctypes.byref(event)):
match event.type:
case sdl3.SDL_EVENT_QUIT:
running = False
case sdl3.SDL_EVENT_KEY_DOWN:
if event.key.key == sdl3.SDLK_ESCAPE:
running = False
width, height = ctypes.c_int(), ctypes.c_int()
sdl3.SDL_GetWindowSize(window, width, height)
frect.w, frect.h = frect.w * width.value / frect.w * scale, frect.h * width.value / frect.w * scale
frect.x, frect.y = width.value / 2 - frect.w / 2, height.value / 2 - frect.h / 2
if currentAudioDevice and not sdl3.Mix_Playing(channel):
channel = sdl3.Mix_PlayChannel(-1, chunks[currentIndex], 1)
currentIndex += 1
if currentIndex >= len(chunks):
currentIndex = 0
lastTime, deltaTime = \
time.time(), time.time() - lastTime
hue, frames = (hue + 0.5 * deltaTime) % 1.0, frames + 1.0
sdl3.SDL_SetRenderDrawColorFloat(renderer, *colorsys.hsv_to_rgb(hue, 1.0, 0.1), 255.0)
sdl3.SDL_RenderClear(renderer)
sdl3.SDL_RenderTexture(renderer, texture, None, ctypes.byref(frect))
sinceLastFrame += deltaTime
if sinceLastFrame >= frameCooldown:
framesPerSecond = int(frames / sinceLastFrame)
sinceLastFrame, frames = 0.0, 0.0
if textTexture is not None:
sdl3.SDL_DestroySurface(textSurface)
sdl3.SDL_DestroyTexture(textTexture)
textSurface = sdl3.TTF_RenderText_Solid(font, f"FPS: {framesPerSecond}".encode(), sdl3.SDL_Color(255, 255, 255, 255))
textTexture = sdl3.SDL_CreateTextureFromSurface(renderer, textSurface)
textRect = sdl3.SDL_Rect()
sdl3.SDL_GetSurfaceClipRect(textSurface, ctypes.byref(textRect))
sdl3.SDL_RectToFRect(ctypes.byref(textRect), ctypes.byref(textFRect))
error = sdl3.SDL_GetError()
if error:
print(f"error: {error.decode().lower()}.")
return -1
if textTexture is not None:
sdl3.SDL_RenderTexture(renderer, textTexture, None, ctypes.byref(textFRect))
sdl3.SDL_RenderPresent(renderer)
if textTexture is not None:
sdl3.SDL_DestroySurface(textSurface)
sdl3.SDL_DestroyTexture(textTexture)
if currentAudioDevice:
for i in chunks:
sdl3.Mix_FreeChunk(i)
sdl3.Mix_CloseAudio()
sdl3.Mix_Quit()
sdl3.TTF_CloseFont(font)
sdl3.TTF_Quit()
sdl3.SDL_DestroySurface(surface)
sdl3.SDL_DestroyTexture(texture)
sdl3.IMG_Quit()
sdl3.SDL_DestroyRenderer(renderer)
sdl3.SDL_DestroyWindow(window)
sdl3.SDL_Quit()
return 0
if __name__ == "__main__":
sys.exit(main(sys.argv))