78 lines
1.6 KiB
V
78 lines
1.6 KiB
V
// Copyright (c) 2019-2020 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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// note we might need special case for this
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// import gl
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#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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pub 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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fn C.stbi_load() voidptr
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fn C.stbi_load_from_memory() voidptr
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fn C.stbi_image_free()
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fn C.stbi_set_flip_vertically_on_load()
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pub 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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flag := if ext == 'png' { C.STBI_rgb_alpha } else { 0 }
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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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}
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return res
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}
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//pub fn load_from_memory(buf []byte) Image {
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pub fn load_from_memory(buf byteptr) 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, 3812, &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 from memory')
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exit(1)
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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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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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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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