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display_sdl: Fix incorrect blend mode during display_read

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The blend mode was set in a way that multiplied pixels with the alpha
value during read, which caused tests to fail.

Signed-off-by: Martin Stumpf <finomnis@gmail.com>
This commit is contained in:
Martin Stumpf 2025-04-29 14:30:37 +02:00 • committed by Benjamin Cabé
commit 2c1cef9659
1 changed files with 2 additions and 0 deletions
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2
drivers/display/display_sdl_bottom.c
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@ -154,11 +154,13 @@ int sdl_display_read_bottom(const uint16_t height, const uint16_t width,
}
SDL_SetRenderTarget(renderer, read_texture);
SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_NONE);
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer, texture, NULL, NULL);
SDL_RenderReadPixels(renderer, &rect, SDL_PIXELFORMAT_ARGB8888, buf, width * 4);
SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_BLEND);
SDL_SetRenderTarget(renderer, NULL);
SDL_UnlockMutex(mutex);