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| Use this function to create SDL_RWops structures from files. | Use this function to *create a new SDL_RWops structure for reading from and/or writing to a named file*. |
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| A pointer to the SDL_RWops structure that is created, *or NULL on failure*. | Returns a pointer to the SDL_RWops structure that is created, *or NULL on failure*. |
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| You can add your code example here | SDL_RWops *file; SDL_Surface *image; file = SDL_RWFromFile("myimage.bmp", "rb"); image = SDL_LoadBMP_RW(file, 1); // 1 means the file will be automatically closed. // Do something with image here. |
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| *Available '''mode''' strings: | *The '''mode''' string is treated the same as in a call to the C library's fopen(). Available '''mode''' strings: |
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SDL_RWFromFile
Use this function to *create a new SDL_RWops structure for reading from and/or writing to a named file*.
Contents
Syntax
SDL_RWops* SDL_RWFromFile(const char* file,
const char* mode)
Function Parameters
file |
a pointer to the file containing the information to fill an SDL_RWops structure with |
mode |
a pointer to the mode to be used for/in the SDL_RWops structure; see Remarks for details |
Return Value
Returns a pointer to the SDL_RWops structure that is created, *or NULL on failure*.
Code Examples
SDL_RWops *file;
SDL_Surface *image;
file = SDL_RWFromFile("myimage.bmp", "rb");
image = SDL_LoadBMP_RW(file, 1); // 1 means the file will be automatically closed.
// Do something with image here.
Remarks
*The mode string is treated the same as in a call to the C library's fopen().
Available mode strings:
r |
Open a file for reading. The file must exist. |
w |
Create an empty file for writing. If a file with the same name already exists its content is erased and the file is treated as a new empty file. |
a |
Append to a file. Writing operations append data at the end of the file. The file is created if it does not exist. |
r+ |
Open a file for update both reading and writing. The file must exist. |
w+ |
Create an empty file for both reading and writing. If a file with the same name already exists its content is erased and the file is treated as a new empty file. |
a+ |
Open a file for reading and appending. All writing operations are performed at the end of the file, protecting the previous content to be overwritten. You can reposition (fseek, rewind) the internal pointer to anywhere in the file for reading, but writing operations will move it back to the end of file. The file is created if it does not exist. |
NOTE: In order to open a file as a binary file, a "b" character has to be included in the mode string. This additional "b" character can either be appended at the end of the string (thus making the following compound modes: "rb", "wb", "ab", "r+b", "w+b", "a+b") or be inserted between the letter and the "+" sign for the mixed modes ("rb+", "wb+", "ab+"). Additional characters may follow the sequence, although they should have no effect. For example, "t" is sometimes appended to make explicit the file is a text file. *
Related Functions
SDL_RWFromFP ???
SDL_RWFromMem ???
