I cannot draw a PNG-file

[ivan-enzhaev]

Hello,

I try to draw a PNG-file but it draws nothing:

draw-png-image-pysdl3.zip

# pip install PySDL3
# py main.py

import ctypes
import os
import time

os.environ["SDL_MAIN_USE_CALLBACKS"] = "1"

import sdl3

renderer = ctypes.POINTER(sdl3.SDL_Renderer)()
window = ctypes.POINTER(sdl3.SDL_Window)()
spriteTexture = None

@sdl3.SDL_AppInit_func
def SDL_AppInit(appstate, argc, argv):
    global spriteTexture

    if not sdl3.SDL_Init(sdl3.SDL_INIT_VIDEO):
        sdl3.SDL_Log("Couldn't initialize SDL: %s".encode() % sdl3.SDL_GetError())
        return sdl3.SDL_APP_FAILURE

    if not sdl3.SDL_CreateWindowAndRenderer("Sprite animation, PySDL3".encode(), 380, 380, 0, window, renderer):
        sdl3.SDL_Log("Couldn't create window/renderer: %s".encode() % sdl3.SDL_GetError())
        return sdl3.SDL_APP_FAILURE

    sdl3.SDL_SetRenderVSync(renderer, 1) # Turn on vertical sync

    texturePath = "./assets/sprites/warrior/idle.png".encode()
    spriteTexture = sdl3.IMG_LoadTexture(renderer, texturePath)
    if not spriteTexture:
        sdl3.SDL_Log("Error: %s".encode() % sdl3.SDL_GetError())
        return sdl3.SDL_APP_FAILURE

    return sdl3.SDL_APP_CONTINUE

@sdl3.SDL_AppEvent_func
def SDL_AppEvent(appstate, event):
    if sdl3.SDL_DEREFERENCE(event).type == sdl3.SDL_EVENT_QUIT:
        return sdl3.SDL_APP_SUCCESS
    
    return sdl3.SDL_APP_CONTINUE

@sdl3.SDL_AppIterate_func
def SDL_AppIterate(appstate):
    global frames
    global frameIndex
    global spriteTexture

    sdl3.SDL_SetRenderDrawColor(renderer, 33, 33, 33, sdl3.SDL_ALPHA_OPAQUE)
    sdl3.SDL_RenderClear(renderer) # Start with a blank canvas

    srcRect = sdl3.SDL_FRect(0, 0, 96, 96)
    destRect = sdl3.SDL_FRect(100, 100, 96, 96)
    sdl3.SDL_RenderTexture(renderer, spriteTexture, srcRect, destRect)

    sdl3.SDL_RenderPresent(renderer)
    return sdl3.SDL_APP_CONTINUE

@sdl3.SDL_AppQuit_func
def SDL_AppQuit(appstate, result):
    global spriteTexture
    sdl3.SDL_DestroyTexture(spriteTexture)

When I add a colored rectangle it draws a texture with a white color:

    srcRect = sdl3.SDL_FRect(0, 0, 96, 96)
    destRect = sdl3.SDL_FRect(100, 100, 96, 96)
    sdl3.SDL_RenderTexture(renderer, spriteTexture, srcRect, destRect)

    sdl3.SDL_SetRenderDrawColor(renderer, 100, 255, 100, sdl3.SDL_ALPHA_OPAQUE)
    rect = sdl3.SDL_FRect(50, 200, 280, 30)
    sdl3.SDL_RenderFillRect(renderer, rect)

    sdl3.SDL_RenderPresent(renderer)
    return sdl3.SDL_APP_CONTINUE

I call SDL_GetError():

    sdl3.SDL_RenderTexture(renderer, spriteTexture, srcRect, destRect)
    print(sdl3.SDL_GetError())

It prints: b'__FUNCTION__, ID3D11Device1::CreatePixelShader: The parameter is incorrect.'

[Aermoss]

Try using an another render driver by setting 'SDL_RENDER_DRIVER' envrionment variable to 'opengl', 'vulkan', 'software', etc.

import os

os.environ["SDL_RENDER_DRIVER"] = "opengl"

[ivan-enzhaev]

Thank you very much!

draw-png-image-pysdl3.zip

pip install PySDL3
py main.py