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// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module stbi
#flag -I @VEXEROOT/thirdparty/stb_image
#include "stb_image.h"
#flag @VEXEROOT/thirdparty/stb_image/stbi.o
pub struct Image {
pub mut:
width int
height int
nr_channels int
ok bool
data voidptr
ext string
}
fn C.stbi_load(filename &char, x &int, y &int, channels_in_file &int, desired_channels int) &byte
fn C.stbi_load_from_file(f voidptr, x &int, y &int, channels_in_file &int, desired_channels int) &byte
fn C.stbi_load_from_memory(buffer &byte, len int, x &int, y &int, channels_in_file &int, desired_channels int) &byte
fn C.stbi_image_free(retval_from_stbi_load &byte)
fn C.stbi_set_flip_vertically_on_load(should_flip int)
fn init() {
set_flip_vertically_on_load(false)
}
pub fn load(path string) ?Image {
ext := path.all_after_last('.')
mut res := Image{
ok: true
ext: ext
data: 0
}
// flag := if ext == 'png' { C.STBI_rgb_alpha } else { 0 }
desired_channels := if ext == 'png' { 4 } else { 0 }
res.data = C.stbi_load(&char(path.str), &res.width, &res.height, &res.nr_channels,
desired_channels)
if desired_channels == 4 && res.nr_channels == 3 {
// Fix an alpha png bug
res.nr_channels = 4
}
if isnil(res.data) {
return error('stbi image failed to load from "$path"')
}
return res
}
pub fn load_from_memory(buf &byte, bufsize int) ?Image {
mut res := Image{
ok: true
data: 0
}
flag := C.STBI_rgb_alpha
res.data = C.stbi_load_from_memory(buf, bufsize, &res.width, &res.height, &res.nr_channels,
flag)
if isnil(res.data) {
return error('stbi image failed to load from memory')
}
return res
}
pub fn (img &Image) free() {
C.stbi_image_free(img.data)
}
/*
pub fn (img Image) tex_image_2d() {
mut rgb_flag := C.GL_RGB
if img.ext == 'png' {
rgb_flag = C.GL_RGBA
}
C.glTexImage2D(C.GL_TEXTURE_2D, 0, rgb_flag, img.width, img.height, 0,
rgb_flag, C.GL_UNSIGNED_BYTE, img.data)
}
*/
pub fn set_flip_vertically_on_load(val bool) {
C.stbi_set_flip_vertically_on_load(val)
}
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