v/vlib/stbi/stbi.v

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// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
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module stbi
import gl
#flag -I @VROOT/thirdparty/stb_image
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#define STB_IMAGE_IMPLEMENTATION
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#include "stb_image.h"
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struct Image {
mut:
width int
height int
nr_channels int
ok bool
data voidptr
ext string
}
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pub fn load(path string) Image {
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ext := path.all_after('.')
mut res := Image {
ok: true
ext: ext
data: 0
}
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flag := if ext == 'png' { C.STBI_rgb_alpha } else { 0 }
res.data = C.stbi_load(path.str, &res.width, &res.height, &res.nr_channels, flag)
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if isnil(res.data) {
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println('stbi image failed to load')
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exit(1)
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}
return res
}
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pub fn (img Image) free() {
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C.stbi_image_free(img.data)
}
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pub fn (img Image) tex_image_2d() {
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mut rgb_flag := C.GL_RGB
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if img.ext == 'png' {
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rgb_flag = C.GL_RGBA
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}
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C.glTexImage2D(C.GL_TEXTURE_2D, 0, rgb_flag, img.width, img.height, 0,
rgb_flag, C.GL_UNSIGNED_BYTE, img.data)
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}
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pub fn set_flip_vertically_on_load(val bool) {
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C.stbi_set_flip_vertically_on_load(val)
}