= SDL_CreateTextureFromSurface =

Create a texture from an existing surface.

== Syntax ==

<syntaxhighlight lang='c'>
SDL_Texture * SDL_CreateTextureFromSurface(SDL_Renderer * renderer, SDL_Surface * surface);
</syntaxhighlight>

== Function Parameters ==

{|
|'''renderer'''
|the rendering context
|-
|'''surface'''
|the [[SDL_Surface]] structure containing pixel data used to fill the texture
|}

== Return Value ==

Returns the created texture or NULL on failure; call [[SDL_GetError]]() for
more information.

== Remarks ==

The surface is not modified or freed by this function.

The [[SDL_TextureAccess]] hint for the created texture is
<code>[[SDL_TEXTUREACCESS_STATIC]]</code>.

The pixel format of the created texture may be different from the pixel
format of the surface. Use [[SDL_QueryTexture]]() to query the pixel format
of the texture.

== Version ==

This function is available since SDL 2.0.0.

== Code Examples ==

<syntaxhighlight lang='c++'>
Uint32 rmask, gmask, bmask, amask;

/* SDL interprets each pixel as a 32-bit number, so our masks must depend
   on the endianness (byte order) of the machine */
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
    rmask = 0xff000000;
    gmask = 0x00ff0000;
    bmask = 0x0000ff00;
    amask = 0x000000ff;
#else
    rmask = 0x000000ff;
    gmask = 0x0000ff00;
    bmask = 0x00ff0000;
    amask = 0xff000000;
#endif

SDL_Surface *surface = SDL_CreateRGBSurface(0, 640, 480, 32, rmask, gmask, bmask, amask);

if (surface == NULL) {
    fprintf(stderr, "CreateRGBSurface failed: %s\n", SDL_GetError());
    exit(1);
}


SDL_Texture *texture = SDL_CreateTextureFromSurface(renderer, surface);

if (texture == NULL) {
    fprintf(stderr, "CreateTextureFromSurface failed: %s\n", SDL_GetError());
    exit(1);
}

SDL_FreeSurface(surface);
surface = NULL;

</syntaxhighlight>

== Related Functions ==

:[[SDL_CreateTexture]]
:[[SDL_DestroyTexture]]
:[[SDL_QueryTexture]]

----
[[CategoryAPI]], [[CategoryRender]]