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#ifndef STBI_INCLUDE_STB_IMAGE_H

#define STBI_INCLUDE_STB_IMAGE_H

// To get a header file for this, either cut and paste the header,

// or create stb_image.h, #define STBI_HEADER_FILE_ONLY, and

// then include stb_image.c from it.

////   begin header file  ////////////////////////////////////////////////////

//

// Limitations:

//    - no jpeg progressive support

//    - non-HDR formats support 8-bit samples only (jpeg, png)

//    - no delayed line count (jpeg) -- IJG doesn't support either

//    - no 1-bit BMP

//    - GIF always returns *comp=4

//

// Basic usage (see HDR discussion below):

//    int x,y,n;

//    unsigned char *data = stbi_load(filename, &x, &y, &n, 0);

//    // ... process data if not NULL ... 

//    // ... x = width, y = height, n = # 8-bit components per pixel ...

//    // ... replace '0' with '1'..'4' to force that many components per pixel

//    stbi_image_free(data)

//

// Standard parameters:

//    int *x       -- outputs image width in pixels

//    int *y       -- outputs image height in pixels

//    int *comp    -- outputs # of image components in image file

//    int req_comp -- if non-zero, # of image components requested in result

//

// The return value from an image loader is an 'unsigned char *' which points

// to the pixel data. The pixel data consists of *y scanlines of *x pixels,

// with each pixel consisting of N interleaved 8-bit components; the first

// pixel pointed to is top-left-most in the image. There is no padding between

// image scanlines or between pixels, regardless of format. The number of

// components N is 'req_comp' if req_comp is non-zero, or *comp otherwise.

// If req_comp is non-zero, *comp has the number of components that _would_

// have been output otherwise. E.g. if you set req_comp to 4, you will always

// get RGBA output, but you can check *comp to easily see if it's opaque.

//

// An output image with N components has the following components interleaved

// in this order in each pixel:

//

//     N=#comp     components

//       1           grey

//       2           grey, alpha

//       3           red, green, blue

//       4           red, green, blue, alpha

//

// If image loading fails for any reason, the return value will be NULL,

// and *x, *y, *comp will be unchanged. The function stbi_failure_reason()

// can be queried for an extremely brief, end-user unfriendly explanation

// of why the load failed. Define STBI_NO_FAILURE_STRINGS to avoid

// compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly

// more user-friendly ones.

//

// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized.

//

// ===========================================================================

//

// iPhone PNG support:

//

// By default we convert iphone-formatted PNGs back to RGB; nominally they

// would silently load as BGR, except the existing code should have just

// failed on such iPhone PNGs. But you can disable this conversion by

// by calling stbi_convert_iphone_png_to_rgb(0), in which case

// you will always just get the native iphone "format" through.

//

// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per

// pixel to remove any premultiplied alpha *only* if the image file explicitly

// says there's premultiplied data (currently only happens in iPhone images,

// and only if iPhone convert-to-rgb processing is on).

//

// ===========================================================================

//

// HDR image support   (disable by defining STBI_NO_HDR)

//

// stb_image now supports loading HDR images in general, and currently

// the Radiance .HDR file format, although the support is provided

// generically. You can still load any file through the existing interface;

// if you attempt to load an HDR file, it will be automatically remapped to

// LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1;

// both of these constants can be reconfigured through this interface:

//

//     stbi_hdr_to_ldr_gamma(2.2f);

//     stbi_hdr_to_ldr_scale(1.0f);

//

// (note, do not use _inverse_ constants; stbi_image will invert them

// appropriately).

//

// Additionally, there is a new, parallel interface for loading files as

// (linear) floats to preserve the full dynamic range:

//

//    float *data = stbi_loadf(filename, &x, &y, &n, 0);

// 

// If you load LDR images through this interface, those images will

// be promoted to floating point values, run through the inverse of

// constants corresponding to the above:

//

//     stbi_ldr_to_hdr_scale(1.0f);

//     stbi_ldr_to_hdr_gamma(2.2f);

//

// Finally, given a filename (or an open file or memory block--see header

// file for details) containing image data, you can query for the "most

// appropriate" interface to use (that is, whether the image is HDR or

// not), using:

//

//     stbi_is_hdr(char *filename);

#ifndef STBI_NO_STDIO

#include <stdio.h>

#endif

#define STBI_VERSION 1

enum

{

   STBI_default = 0, // only used for req_comp

   STBI_grey       = 1,

   STBI_grey_alpha = 2,

   STBI_rgb        = 3,

   STBI_rgb_alpha  = 4

};

typedef unsigned char stbi_uc;

#ifdef __cplusplus

extern "C" {

#endif

// PRIMARY API - works on images of any type

// load image by filename, open file, or memory buffer

extern stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);

#ifndef STBI_NO_STDIO

extern stbi_uc *stbi_load            (char const *filename,     int *x, int *y, int *comp, int req_comp);

extern stbi_uc *stbi_load_from_file  (FILE *f,                  int *x, int *y, int *comp, int req_comp);

// for stbi_load_from_file, file pointer is left pointing immediately after image

#endif

#ifndef STBI_NO_HDR

   extern float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);

   #ifndef STBI_NO_STDIO

   extern float *stbi_loadf            (char const *filename,   int *x, int *y, int *comp, int req_comp);

   extern float *stbi_loadf_from_file  (FILE *f,                int *x, int *y, int *comp, int req_comp);

   #endif

   extern void   stbi_hdr_to_ldr_gamma(float gamma);

   extern void   stbi_hdr_to_ldr_scale(float scale);

   extern void   stbi_ldr_to_hdr_gamma(float gamma);

   extern void   stbi_ldr_to_hdr_scale(float scale);

#endif // STBI_NO_HDR

// get a VERY brief reason for failure

// NOT THREADSAFE

extern const char *stbi_failure_reason  (void); 

// free the loaded image -- this is just free()

extern void     stbi_image_free      (void *retval_from_stbi_load);

// get image dimensions & components without fully decoding

extern int      stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp);

extern int      stbi_is_hdr_from_memory(stbi_uc const *buffer, int len);

#ifndef STBI_NO_STDIO

extern int      stbi_info            (char const *filename,     int *x, int *y, int *comp);

extern int      stbi_info_from_file  (FILE *f,                  int *x, int *y, int *comp);

extern int      stbi_is_hdr          (char const *filename);

extern int      stbi_is_hdr_from_file(FILE *f);

#endif

// for image formats that explicitly notate that they have premultiplied alpha,

// we just return the colors as stored in the file. set this flag to force

// unpremultiplication. results are undefined if the unpremultiply overflow.

extern void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply);

// indicate whether we should process iphone images back to canonical format,

// or just pass them through "as-is"

extern void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert);

// ZLIB client - used by PNG, available for other purposes

extern char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen);

extern char *stbi_zlib_decode_malloc(const char *buffer, int len, int *outlen);

extern int   stbi_zlib_decode_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);

extern char *stbi_zlib_decode_noheader_malloc(const char *buffer, int len, int *outlen);

extern int   stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);

// define new loaders

typedef struct

{

   int       (*test_memory)(stbi_uc const *buffer, int len);

   stbi_uc * (*load_from_memory)(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);

   #ifndef STBI_NO_STDIO

   int       (*test_file)(FILE *f);

   stbi_uc * (*load_from_file)(FILE *f, int *x, int *y, int *comp, int req_comp);

   #endif

} stbi_loader;

// register a loader by filling out the above structure (you must define ALL functions)

// returns 1 if added or already added, 0 if not added (too many loaders)

// NOT THREADSAFE

extern int stbi_register_loader(stbi_loader *loader);

// define faster low-level operations (typically SIMD support)

#ifdef STBI_SIMD

typedef void (*stbi_idct_8x8)(stbi_uc *out, int out_stride, short data[64], unsigned short *dequantize);

// compute an integer IDCT on "input"

//     input[x] = data[x] * dequantize[x]

//     write results to 'out': 64 samples, each run of 8 spaced by 'out_stride'

//                             CLAMP results to 0..255

typedef void (*stbi_YCbCr_to_RGB_run)(stbi_uc *output, stbi_uc const  *y, stbi_uc const *cb, stbi_uc const *cr, int count, int step);

// compute a conversion from YCbCr to RGB

//     'count' pixels

//     write pixels to 'output'; each pixel is 'step' bytes (either 3 or 4; if 4, write '255' as 4th), order R,G,B

//     y: Y input channel

//     cb: Cb input channel; scale/biased to be 0..255

//     cr: Cr input channel; scale/biased to be 0..255

extern void stbi_install_idct(stbi_idct_8x8 func);

extern void stbi_install_YCbCr_to_RGB(stbi_YCbCr_to_RGB_run func);

#endif // STBI_SIMD

// TYPE-SPECIFIC ACCESS

// is it a jpeg?

extern int      stbi_jpeg_test_memory     (stbi_uc const *buffer, int len);

extern stbi_uc *stbi_jpeg_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);

extern int      stbi_jpeg_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp);

#ifndef STBI_NO_STDIO

extern stbi_uc *stbi_jpeg_load            (char const *filename,     int *x, int *y, int *comp, int req_comp);

extern int      stbi_jpeg_test_file       (FILE *f);

extern stbi_uc *stbi_jpeg_load_from_file  (FILE *f,                  int *x, int *y, int *comp, int req_comp);

extern int      stbi_jpeg_info            (char const *filename,     int *x, int *y, int *comp);

extern int      stbi_jpeg_info_from_file  (FILE *f,                  int *x, int *y, int *comp);

#endif

// is it a png?

extern int      stbi_png_test_memory      (stbi_uc const *buffer, int len);

extern stbi_uc *stbi_png_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);

extern int      stbi_png_info_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp);

#ifndef STBI_NO_STDIO

extern stbi_uc *stbi_png_load             (char const *filename,     int *x, int *y, int *comp, int req_comp);

extern int      stbi_png_info             (char const *filename,     int *x, int *y, int *comp);

extern int      stbi_png_test_file        (FILE *f);

extern stbi_uc *stbi_png_load_from_file   (FILE *f,                  int *x, int *y, int *comp, int req_comp);

extern int      stbi_png_info_from_file   (FILE *f,                  int *x, int *y, int *comp);

#endif

// is it a bmp?

extern int      stbi_bmp_test_memory      (stbi_uc const *buffer, int len);

extern stbi_uc *stbi_bmp_load             (char const *filename,     int *x, int *y, int *comp, int req_comp);

extern stbi_uc *stbi_bmp_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);

#ifndef STBI_NO_STDIO

extern int      stbi_bmp_test_file        (FILE *f);

extern stbi_uc *stbi_bmp_load_from_file   (FILE *f,                  int *x, int *y, int *comp, int req_comp);

#endif

// is it a tga?

extern int      stbi_tga_test_memory      (stbi_uc const *buffer, int len);

extern stbi_uc *stbi_tga_load             (char const *filename,     int *x, int *y, int *comp, int req_comp);

extern stbi_uc *stbi_tga_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);

#ifndef STBI_NO_STDIO

extern int      stbi_tga_test_file        (FILE *f);

extern stbi_uc *stbi_tga_load_from_file   (FILE *f,                  int *x, int *y, int *comp, int req_comp);

#endif

// is it a psd?

extern int      stbi_psd_test_memory      (stbi_uc const *buffer, int len);

extern stbi_uc *stbi_psd_load             (char const *filename,     int *x, int *y, int *comp, int req_comp);

extern stbi_uc *stbi_psd_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);

#ifndef STBI_NO_STDIO

extern int      stbi_psd_test_file        (FILE *f);

extern stbi_uc *stbi_psd_load_from_file   (FILE *f,                  int *x, int *y, int *comp, int req_comp);

#endif

// is it an hdr?

extern int      stbi_hdr_test_memory      (stbi_uc const *buffer, int len);

extern float *  stbi_hdr_load             (char const *filename,     int *x, int *y, int *comp, int req_comp);

extern float *  stbi_hdr_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);

extern stbi_uc *stbi_hdr_load_rgbe        (char const *filename,           int *x, int *y, int *comp, int req_comp);

#ifndef STBI_NO_STDIO

extern int      stbi_hdr_test_file        (FILE *f);

extern float *  stbi_hdr_load_from_file   (FILE *f,                  int *x, int *y, int *comp, int req_comp);

extern stbi_uc *stbi_hdr_load_rgbe_file   (FILE *f,                  int *x, int *y, int *comp, int req_comp);

#endif

// is it a pic?

extern int      stbi_pic_test_memory      (stbi_uc const *buffer, int len);

extern stbi_uc *stbi_pic_load             (char const *filename,     int *x, int *y, int *comp, int req_comp);

extern stbi_uc *stbi_pic_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);

#ifndef STBI_NO_STDIO

extern int      stbi_pic_test_file        (FILE *f);

extern stbi_uc *stbi_pic_load_from_file   (FILE *f,                  int *x, int *y, int *comp, int req_comp);

#endif

// is it a gif?

extern int      stbi_gif_test_memory      (stbi_uc const *buffer, int len);

extern stbi_uc *stbi_gif_load             (char const *filename,     int *x, int *y, int *comp, int req_comp);

extern stbi_uc *stbi_gif_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);

extern int      stbi_gif_info_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp);

#ifndef STBI_NO_STDIO

extern int      stbi_gif_test_file        (FILE *f);

extern stbi_uc *stbi_gif_load_from_file   (FILE *f,                  int *x, int *y, int *comp, int req_comp);

extern int      stbi_gif_info             (char const *filename,     int *x, int *y, int *comp);

extern int      stbi_gif_info_from_file   (FILE *f,                  int *x, int *y, int *comp);

#endif

#ifdef __cplusplus

}

#endif

//

//

////   end header file   /////////////////////////////////////////////////////

#endif // STBI_INCLUDE_STB_IMAGE_H