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87 lines
2.1 KiB
V
87 lines
2.1 KiB
V
// Copyright (c) 2019-2021 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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#flag -I @VEXEROOT/thirdparty/stb_image
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#include "stb_image.h"
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#flag @VEXEROOT/thirdparty/stb_image/stbi.o
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pub struct Image {
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pub 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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fn C.stbi_load(filename charptr, x &int, y &int, channels_in_file &int, desired_channels int) byteptr
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fn C.stbi_load_from_file(f voidptr, x &int, y &int, channels_in_file &int, desired_channels int) byteptr
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fn C.stbi_load_from_memory(buffer byteptr, len int, x &int, y &int, channels_in_file &int, desired_channels int) byteptr
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fn C.stbi_image_free(retval_from_stbi_load byteptr)
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fn C.stbi_set_flip_vertically_on_load(should_flip int)
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fn init() {
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set_flip_vertically_on_load(false)
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}
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pub fn load(path string) ?Image {
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ext := path.all_after_last('.')
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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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// flag := if ext == 'png' { C.STBI_rgb_alpha } else { 0 }
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desired_channels := if ext == 'png' { 4 } else { 0 }
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res.data = C.stbi_load(&char(path.str), &res.width, &res.height, &res.nr_channels, desired_channels)
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if desired_channels == 4 && res.nr_channels == 3 {
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// Fix an alpha png bug
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res.nr_channels = 4
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}
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if isnil(res.data) {
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return error('stbi image failed to load from "$path"')
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}
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return res
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}
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pub fn load_from_memory(buf byteptr, bufsize int) ?Image {
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mut res := Image{
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ok: true
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data: 0
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}
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flag := C.STBI_rgb_alpha
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res.data = C.stbi_load_from_memory(buf, bufsize, &res.width, &res.height, &res.nr_channels,
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flag)
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if isnil(res.data) {
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return error('stbi image failed to load from memory')
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}
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return res
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}
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pub fn (img &Image) free() {
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C.stbi_image_free(img.data)
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}
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/*
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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,
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rgb_flag, C.GL_UNSIGNED_BYTE, img.data)
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}
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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)
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}
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