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use super::FromValue;
use crate::object::Value;
use anyhow::{Result, bail};
use image::{DynamicImage, Rgb, Rgba};
use serde::Serialize;
use std::mem::transmute;
#[derive(Debug, Serialize)]
pub struct Texture2d {
pub width: i32,
pub height: i32,
pub mip_count: i32,
pub name: String,
pub image_data: Vec<u8>,
pub texture_format: TextureFormat,
pub texture_dimension: i32,
}
impl FromValue for Texture2d {
fn from_value(v: Value) -> Result<Self> {
let mut fields = v.as_class("Texture2D").unwrap();
Ok(Texture2d {
width: fields.remove("m_Width").unwrap().as_i32().unwrap(),
height: fields.remove("m_Height").unwrap().as_i32().unwrap(),
mip_count: fields.remove("m_MipCount").unwrap().as_i32().unwrap(),
texture_dimension: fields
.remove("m_TextureDimension")
.unwrap()
.as_i32()
.unwrap(),
texture_format: unsafe {
transmute::<_, TextureFormat>(
fields.remove("m_TextureFormat").unwrap().as_i32().unwrap(),
)
},
name: fields.remove("m_Name").unwrap().as_string().unwrap(),
image_data: fields.remove("image data").unwrap().as_typeless().unwrap(),
})
}
}
impl Texture2d {
pub fn to_image(&self) -> Result<DynamicImage> {
let w = self.width as usize;
let h = self.height as usize;
use TextureFormat::*;
match self.texture_format {
DXT5 => {
let mut buf = vec![0u8; w * h * 4];
texpresso::Format::Bc3.decompress(&self.image_data, w, h, &mut buf);
let im = image::ImageBuffer::<Rgba<u8>, Vec<_>>::from_raw(w as u32, h as u32, buf)
.unwrap();
Ok(im.into())
}
RGB24 => {
let im = image::ImageBuffer::<Rgb<u8>, Vec<_>>::from_raw(
w as u32,
h as u32,
self.image_data.clone(),
)
.unwrap();
Ok(im.into())
}
ARGB32 => {
let mut buf = self.image_data.clone();
for pix in buf.array_chunks_mut::<4>() {
let a = pix[0];
pix[0] = pix[1];
pix[1] = pix[2];
pix[2] = pix[3];
pix[3] = a;
}
let im = image::ImageBuffer::<Rgba<u8>, Vec<_>>::from_raw(w as u32, h as u32, buf)
.unwrap();
Ok(im.into())
}
x => bail!("texture format {x:?} not supported"),
}
}
}
#[allow(non_camel_case_types)]
#[repr(i32)]
#[derive(Debug, Serialize, PartialEq, Clone, Copy)]
pub enum TextureFormat {
Alpha8 = 1,
ARGB4444,
RGB24,
RGBA32,
ARGB32,
ARGBFloat,
RGB565,
BGR24,
R16,
DXT1, // Bc1
DXT3, // Bc2
DXT5, // Bc3
RGBA4444,
BGRA32,
RHalf,
RGHalf,
RGBAHalf,
RFloat,
RGFloat,
RGBAFloat,
YUY2,
RGB9e5Float,
RGBFloat,
BC6H,
BC7,
BC4,
BC5,
DXT1Crunched,
DXT5Crunched,
PVRTC_RGB2,
PVRTC_RGBA2,
PVRTC_RGB4,
PVRTC_RGBA4,
ETC_RGB4,
ATC_RGB4,
ATC_RGBA8,
EAC_R = 41,
EAC_R_SIGNED,
EAC_RG,
EAC_RG_SIGNED,
ETC2_RGB,
ETC2_RGBA1,
ETC2_RGBA8,
ASTC_RGB_4x4,
ASTC_RGB_5x5,
ASTC_RGB_6x6,
ASTC_RGB_8x8,
ASTC_RGB_10x10,
ASTC_RGB_12x12,
ASTC_RGBA_4x4,
ASTC_RGBA_5x5,
ASTC_RGBA_6x6,
ASTC_RGBA_8x8,
ASTC_RGBA_10x10,
ASTC_RGBA_12x12,
ETC_RGB4_3DS,
ETC_RGBA8_3DS,
RG16,
R8,
ETC_RGB4Crunched,
ETC2_RGBA8Crunched,
R16_Alt,
ASTC_HDR_4x4,
ASTC_HDR_5x5,
ASTC_HDR_6x6,
ASTC_HDR_8x8,
ASTC_HDR_10x10,
ASTC_HDR_12x12,
RG32,
RGB48,
RGBA64,
}
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