Re: Change TEXTURE_ACCESS from TARGET to STREAMING

Can you try the latest SDL snapshot? I think this is fixed:
http://www.libsdl.org/tmp/SDL-2.0.zip


On Sun, Oct 9, 2016 at 12:54 PM, stewambo <[email protected]> wrote:

> Hey,
> I need to change the TEXTURE_ACCESS of some textures from TARGET to
> STREAMING, because i want to access and change individual pixels. My best
> guess was to use SDL_RenderReadPixels of my TARGET-texture and write the
> pixel data into a new STREAMING-texture, but the resulting
> STREAMING-texture is flipped upside-down and i don't really know why that
> happens (maybe because open_gl has it's origin in the bottom-left and not
> top-left?) and how to fix it...
> My code looks like this:
>
>
>
> Code:
>
>
> SDL_Texture* targetTexture = SDL_CreateTexture(renderer,
> SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, width, height);
> SDL_SetRenderTarget(renderer, targetTexture);
> //render some things onto targetTexture
> SDL_Texture* streamingTexture = SDL_CreateTexture( renderer,
> SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_STREAMING, width, height );
> void* streamingPixels;
> int streamingPitch;
> SDL_LockTexture( streamingTexture, NULL, &streamingPixels, &streamingPitch
> );
> SDL_RenderReadPixels(renderer, NULL, SDL_PIXELFORMAT_RGBA8888,
> streamingPixels, streamingPitch);
> SDL_UnlockTexture( streamingTexture );
> SDL_SetRenderTarget(renderer, NULL);
>
>
>
>
> Any help is appreciated [image: Smile]
>
> _______________________________________________
> SDL mailing list
> [email protected]
> http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
>
>

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