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add example for compressing bc6h #30

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add example for compressing bc6h #30

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df024b1
Update main.rs
ScanMountGoat Dec 18, 2024
ad9b7d8
Update Cargo.toml
ScanMountGoat Dec 18, 2024
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1 change: 1 addition & 0 deletions Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,7 @@ ispc = ["ispc_compile", "cc"]
[dev-dependencies]
ddsfile = "0.5.0"
image = "0.25.1"
half = "2.4.1"

[profile.release]
lto = true
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30 changes: 30 additions & 0 deletions examples/main.rs
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Expand Up @@ -5,6 +5,7 @@ use image::LumaA;
use image::Pixel;
use intel_tex_2::bc4;
use intel_tex_2::bc5;
use intel_tex_2::bc6h;
use intel_tex_2::bc7;
use std::fs::File;
use std::path::Path;
Expand Down Expand Up @@ -93,6 +94,35 @@ fn main() {
let mut dds_file = File::create("examples/lambertian_bc5.dds").unwrap();
dds.write(&mut dds_file).expect("Failed to write dds file");
}
// BC6
{
let mut dds = Dds::new_dxgi(NewDxgiParams {
format: DxgiFormat::BC6H_UF16,
..dds_defaults
})
.unwrap();
let rgba_f16_data: Vec<u8> = rgba_img
.iter()
.flat_map(|c| half::f16::from_f32(*c as f32 / 255.0).to_le_bytes())
.collect();
let surface = intel_tex_2::RgbaSurface {
width,
height,
stride: width * 4 * std::mem::size_of::<half::f16>() as u32,
data: &rgba_f16_data,
};

println!("Compressing to BC6...");
bc6h::compress_blocks_into(
&bc6h::very_fast_settings(),
&surface,
dds.get_mut_data(0 /* layer */).unwrap(),
);
println!(" Done!");
println!("Saving lambertian_bc6.dds file");
let mut dds_file = File::create("examples/lambertian_bc6.dds").unwrap();
dds.write(&mut dds_file).expect("Failed to write dds file");
}
// BC7
{
let mut dds = Dds::new_dxgi(NewDxgiParams {
Expand Down
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