69 lines
1.3 KiB
Go
69 lines
1.3 KiB
Go
// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module stbi
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import gl
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#flag linux -I$HOME/code/v/thirdparty/stb_image
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#flag darwin -I$HOME/code/v/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 {
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mut:
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width int
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height int
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nr_channels int
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ok bool
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data voidptr
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ext string
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}
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import const (
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GL_RGBA
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GL_RGB
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GL_UNSIGNED_BYTE
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GL_TEXTURE_2D
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STBI_rgb_alpha
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)
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fn load(path string) Image {
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ext := path.all_after('.')
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mut res := Image {
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ok: true
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ext: ext
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data: 0
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}
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if ext == 'png' {
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res.data = C.stbi_load(path.str, &res.width, &res.height, &res.nr_channels, STBI_rgb_alpha)
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}
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else {
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res.data = C.stbi_load(path.str, &res.width, &res.height, &res.nr_channels, 0)
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}
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if isnil(res.data) {
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println('stbi cant load')
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exit(1)
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}
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return res
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}
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fn (img Image) free() {
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C.stbi_image_free(img.data)
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}
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fn (img Image) tex_image_2d() {
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mut rgb_flag := GL_RGB
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if img.ext == 'png' {
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rgb_flag = GL_RGBA
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}
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C.glTexImage2D(GL_TEXTURE_2D, 0, rgb_flag, img.width, img.height, 0, rgb_flag, GL_UNSIGNED_BYTE,
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img.data)
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}
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fn set_flip_vertically_on_load(val bool) {
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C.stbi_set_flip_vertically_on_load(val)
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}
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