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v/vlib/stbi/stbi.v
2020-01-23 21:04:46 +01:00

78 lines
1.6 KiB
V

// Copyright (c) 2019-2020 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
// note we might need special case for this
// import gl
#flag -I @VROOT/thirdparty/stb_image
#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"
pub struct Image {
mut:
width int
height int
nr_channels int
ok bool
data voidptr
ext string
}
fn C.stbi_load() voidptr
fn C.stbi_load_from_memory() voidptr
fn C.stbi_image_free()
fn C.stbi_set_flip_vertically_on_load()
pub fn load(path string) Image {
ext := path.all_after('.')
mut res := Image {
ok: true
ext: ext
data: 0
}
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)
if isnil(res.data) {
println('stbi image failed to load')
exit(1)
}
return res
}
//pub fn load_from_memory(buf []byte) Image {
pub fn load_from_memory(buf byteptr) Image {
mut res := Image {
ok: true
data: 0
}
flag := C.STBI_rgb_alpha
res.data = C.stbi_load_from_memory(buf, 3812, &res.width, &res.height, &res.nr_channels, flag)
if isnil(res.data) {
println('stbi image failed to load from memory')
exit(1)
}
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)
}