stb_image.odin

#foreign_library "stb_image"

DEFAULT    :: 0
GREY       :: 1
GREY_ALPHA :: 2
RGB        :: 3
RGB_ALPHA  :: 4

io_callbacks :: struct #ordered {
	read: proc(user: rawptr, data: ^byte, size: i32) -> i32 // fill 'data' with 'size' bytes.  return number of bytes actually read
	skip: proc(user: rawptr, n: i32)                        // skip the next 'n' bytes, or 'unget' the last -n bytes if negative
	eof:  proc(user: rawptr) -> i32                         // returns nonzero if we are at end of file/data
}

load                :: proc(filename: ^byte,                   x, y, comp: ^i32, req_comp: i32) -> ^byte #foreign "stbi_load"
load_from_memory    :: proc(buffer: ^byte,       len: i32,     x, y, comp: ^i32, req_comp: i32) -> ^byte #foreign "stbi_load_from_memory"
load_from_callbacks :: proc(clbk: ^io_callbacks, user: rawptr, x, y, comp: ^i32, req_comp: i32) -> ^byte #foreign "stbi_load_from_callbacks"


hdr_to_ldr_gamma :: proc(gamma: f32) #foreign "stbi_hdr_to_ldr_gamma"
hdr_to_ldr_scale :: proc(scale: f32) #foreign "stbi_hdr_to_ldr_scale"

ldr_to_hdr_gamma :: proc(gamma: f32) #foreign "stbi_ldr_to_hdr_gamma"
ldr_to_hdr_scale :: proc(scale: f32) #foreign "stbi_ldr_to_hdr_scale"

is_hdr_from_memory    :: proc(buffer: ^byte, len: i32) -> i32           #foreign "stbi_is_hdr_from_memory"
is_hdr_from_callbacks :: proc(clbk: ^io_callbacks, user: rawptr) -> i32 #foreign "stbi_is_hdr_from_callbacks"

is_hdr :: proc(filename: ^byte) -> i32 #foreign "stbi_is_hdr"

// get a VERY brief reason for failure
// NOT THREADSAFE
failure_reason :: proc() -> ^byte #foreign "stbi_failure_reason"

image_free :: proc(retval_from_stbi_load: rawptr) #foreign "stbi_image_free"

info                :: proc(filename: ^byte,                   x, y, comp: ^i32) -> i32 #foreign "stbi_info"
info_from_memory    :: proc(buffer: ^byte,       len: i32,     x, y, comp: ^i32) -> i32 #foreign "stbi_info_from_memory"
info_from_callbacks :: proc(clbk: ^io_callbacks, user: rawptr, x, y, comp: ^i32) -> i32 #foreign "stbi_info_from_callbacks"

set_unpremultiply_on_load   :: proc(flag_true_if_should_unpremultiply: i32) #foreign "stbi_set_unpremultiply_on_load"
convert_iphone_png_to_rgb   :: proc(flag_true_if_should_convert: i32)       #foreign "stbi_convert_iphone_png_to_rgb"
set_flip_vertically_on_load :: proc(flag_true_if_should_flip: i32)          #foreign "stbi_set_flip_vertically_on_load"


zlib_decode_malloc_guesssize            :: proc(buffer: ^byte, len, initial_size: i32, outlen: ^i32) -> ^byte #foreign "stbi_zlib_decode_malloc_guesssize"
zlib_decode_malloc_guesssize_headerflag :: proc(buffer: ^byte, len, initial_size: i32, outlen: ^i32, parse_header: i32) -> ^byte #foreign "stbi_zlib_decode_malloc_guesssize_headerflag"
zlib_decode_malloc                      :: proc(buffer: ^byte, len: i32, outlen: ^i32) -> ^byte #foreign "stbi_zlib_decode_malloc"
zlib_decode_buffer                      :: proc(obuffer: ^byte, olen: i32, ibuffer: ^byte, ilen: i32) -> i32 #foreign "stbi_zlib_decode_buffer"

zlib_decode_noheader_malloc :: proc(buffer: ^byte, len: i32, outlen: ^i32) -> ^byte #foreign "stbi_zlib_decode_noheader_malloc"
zlib_decode_noheader_buffer :: proc(obuffer: ^byte, olen: i32, ibuffer: ^byte, ilen: i32) -> i32 #foreign "stbi_zlib_decode_noheader_buffer"