This software is provided 'as-is', without any express or implied

warranty. In no event will the authors be held liable for any damages

arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,

including commercial applications, and to alter it and redistribute it

freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not

claim that you wrote the original software. If you use this software

in a product, an acknowledgment in the product documentation would be

appreciated but is not required.

2. Altered source versions must be plainly marked as such, and must not be

misrepresented as being the original software.

3. This notice may not be removed or altered from any source distribution.

*/

/* A simple library to load images of various formats as SDL surfaces */

#include <stdio.h>

#include <string.h>

#include <ctype.h>

#include "SDL_image.h"

#define ARRAYSIZE(a) (sizeof(a) / sizeof((a)[0]))

/* Table of image detection and loading functions */

static struct {

char *type;

int (SDLCALL *is)(SDL_RWops *src);

SDL_Surface *(SDLCALL *load)(SDL_RWops *src);

/* keep magicless formats first */

{ "TGA", NULL, IMG_LoadTGA_RW },

{ "CUR", IMG_isCUR, IMG_LoadCUR_RW },

{ "ICO", IMG_isICO, IMG_LoadICO_RW },

{ "BMP", IMG_isBMP, IMG_LoadBMP_RW },

{ "GIF", IMG_isGIF, IMG_LoadGIF_RW },

{ "JPG", IMG_isJPG, IMG_LoadJPG_RW },

{ "LBM", IMG_isLBM, IMG_LoadLBM_RW },

{ "PCX", IMG_isPCX, IMG_LoadPCX_RW },

{ "PNG", IMG_isPNG, IMG_LoadPNG_RW },

{ "PNM", IMG_isPNM, IMG_LoadPNM_RW }, /* P[BGP]M share code */

{ "TIF", IMG_isTIF, IMG_LoadTIF_RW },

{ "XCF", IMG_isXCF, IMG_LoadXCF_RW },

{ "XPM", IMG_isXPM, IMG_LoadXPM_RW },

{ "XV", IMG_isXV, IMG_LoadXV_RW },

{ "WEBP", IMG_isWEBP, IMG_LoadWEBP_RW },

};

const SDL_version *IMG_Linked_Version(void)

{

static SDL_version linked_version;

SDL_IMAGE_VERSION(&linked_version);

return(&linked_version);

}

extern int IMG_InitWEBP();

extern void IMG_QuitWEBP();

static int initialized = 0;

int IMG_Init(int flags)

{

int result = 0;

/* Passing 0 returns the currently initialized loaders */

if (!flags) {

return initialized;

}

if (flags & IMG_INIT_JPG) {

if ((initialized & IMG_INIT_JPG) || IMG_InitJPG() == 0) {

result |= IMG_INIT_JPG;

}

}

if (flags & IMG_INIT_PNG) {

if ((initialized & IMG_INIT_PNG) || IMG_InitPNG() == 0) {

result |= IMG_INIT_PNG;

}

}

if (flags & IMG_INIT_TIF) {

if ((initialized & IMG_INIT_TIF) || IMG_InitTIF() == 0) {

result |= IMG_INIT_TIF;

}

}

if (flags & IMG_INIT_WEBP) {

if ((initialized & IMG_INIT_WEBP) || IMG_InitWEBP() == 0) {

result |= IMG_INIT_WEBP;

}

}

initialized |= result;

}

void IMG_Quit()

{

if (initialized & IMG_INIT_JPG) {

IMG_QuitJPG();

}

if (initialized & IMG_INIT_PNG) {

IMG_QuitPNG();

}

if (initialized & IMG_INIT_TIF) {

IMG_QuitTIF();

}

if (initialized & IMG_INIT_WEBP) {

IMG_QuitWEBP();

}

initialized = 0;

}

/* Load an image from a file */

SDL_Surface *IMG_Load(const char *file)

{

SDL_RWops *src = SDL_RWFromFile(file, "rb");

if(ext) {

ext++;

}

if(!src) {

/* The error message has been set in SDL_RWFromFile */

return NULL;

}

return IMG_LoadTyped_RW(src, 1, ext);

}

/* Load an image from an SDL datasource (for compatibility) */

SDL_Surface *IMG_Load_RW(SDL_RWops *src, int freesrc)

{

return IMG_LoadTyped_RW(src, freesrc, NULL);

}

/* Portable case-insensitive string compare function */

if ( SDL_toupper((unsigned char)*str1) !=

SDL_toupper((unsigned char)*str2) )

break;

++str1;

++str2;

}

return (!*str1 && !*str2);

}

/* Load an image from an SDL datasource, optionally specifying the type */

int i;

SDL_Surface *image;

/* Make sure there is something to do.. */

if ( src == NULL ) {

IMG_SetError("Passed a NULL data source");

return(NULL);

}

/* See whether or not this data source can handle seeking */

if ( SDL_RWseek(src, 0, RW_SEEK_CUR) < 0 ) {

IMG_SetError("Can't seek in this data source");

if(freesrc)

SDL_RWclose(src);

return(NULL);

}

/* Detect the type of image being loaded */

image = NULL;

for ( i=0; i < ARRAYSIZE(supported); ++i ) {

if(supported[i].is) {

if(!supported[i].is(src))

continue;

} else {

/* magicless format */

if(!type

|| !IMG_string_equals(type, supported[i].type))

continue;

}

fprintf(stderr, "IMGLIB: Loading image as %s\n",

supported[i].type);

image = supported[i].load(src);

if(freesrc)

SDL_RWclose(src);

return image;

}

if ( freesrc ) {

SDL_RWclose(src);

}

IMG_SetError("Unsupported image format");

return NULL;

}

SDL_Texture *IMG_LoadTexture(SDL_Renderer *renderer, const char *file)

{

SDL_Texture *texture = NULL;

SDL_Surface *surface = IMG_Load(file);

if (surface) {

texture = SDL_CreateTextureFromSurface(renderer, surface);

SDL_FreeSurface(surface);

}

return texture;

}

SDL_Texture *IMG_LoadTexture_RW(SDL_Renderer *renderer, SDL_RWops *src, int freesrc)

{

SDL_Texture *texture = NULL;

SDL_Surface *surface = IMG_Load_RW(src, freesrc);

if (surface) {

texture = SDL_CreateTextureFromSurface(renderer, surface);

SDL_FreeSurface(surface);

}

return texture;

}

SDL_Texture *IMG_LoadTextureTyped_RW(SDL_Renderer *renderer, SDL_RWops *src, int freesrc, const char *type)

{

SDL_Texture *texture = NULL;

SDL_Surface *surface = IMG_LoadTyped_RW(src, freesrc, type);

if (surface) {

texture = SDL_CreateTextureFromSurface(renderer, surface);

SDL_FreeSurface(surface);

}

return texture;

}