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Texture atlas format and conversion #1365

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merged 6 commits into from
Feb 1, 2021
Merged

Texture atlas format and conversion #1365

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0aa7a65
can specify texture format for a texture atlas
mockersf Feb 1, 2021
85e5be8
add automatic conversion
mockersf Feb 1, 2021
b32cd09
clippy
mockersf Feb 1, 2021
137985b
set convert behind cfg, as it uses methods from image that are behind…
mockersf Feb 1, 2021
3f130e8
reuse code
cart Feb 1, 2021
6c494c8
spelling
mockersf Feb 1, 2021
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264 changes: 150 additions & 114 deletions crates/bevy_render/src/texture/image_texture_loader.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -16,8 +16,6 @@ impl AssetLoader for ImageTextureLoader {
load_context: &'a mut LoadContext,
) -> BoxedFuture<'a, Result<()>> {
Box::pin(async move {
use bevy_core::AsBytes;

// Find the image type we expect. A file with the extension "png" should
// probably load as a PNG.

Expand All @@ -41,118 +39,7 @@ impl AssetLoader for ImageTextureLoader {

let dyn_img = image::load_from_memory_with_format(bytes, img_format)?;

let width;
let height;

let data: Vec<u8>;
let format: TextureFormat;

match dyn_img {
image::DynamicImage::ImageLuma8(i) => {
width = i.width();
height = i.height();
format = TextureFormat::R8Unorm;

data = i.into_raw();
}
image::DynamicImage::ImageLumaA8(i) => {
width = i.width();
height = i.height();
format = TextureFormat::Rg8Unorm;

data = i.into_raw();
}
image::DynamicImage::ImageRgb8(i) => {
let i = image::DynamicImage::ImageRgb8(i).into_rgba8();
width = i.width();
height = i.height();
format = TextureFormat::Rgba8UnormSrgb;

data = i.into_raw();
}
image::DynamicImage::ImageRgba8(i) => {
width = i.width();
height = i.height();
format = TextureFormat::Rgba8UnormSrgb;

data = i.into_raw();
}
image::DynamicImage::ImageBgr8(i) => {
let i = image::DynamicImage::ImageBgr8(i).into_bgra8();

width = i.width();
height = i.height();
format = TextureFormat::Bgra8UnormSrgb;

data = i.into_raw();
}
image::DynamicImage::ImageBgra8(i) => {
width = i.width();
height = i.height();
format = TextureFormat::Bgra8UnormSrgb;

data = i.into_raw();
}
image::DynamicImage::ImageLuma16(i) => {
width = i.width();
height = i.height();
format = TextureFormat::R16Uint;

let raw_data = i.into_raw();

data = raw_data.as_slice().as_bytes().to_owned();
}
image::DynamicImage::ImageLumaA16(i) => {
width = i.width();
height = i.height();
format = TextureFormat::Rg16Uint;

let raw_data = i.into_raw();

data = raw_data.as_slice().as_bytes().to_owned();
}

image::DynamicImage::ImageRgb16(image) => {
width = image.width();
height = image.height();
format = TextureFormat::Rgba16Uint;

let mut local_data =
Vec::with_capacity(width as usize * height as usize * format.pixel_size());

for pixel in image.into_raw().chunks_exact(3) {
// TODO unsafe_get in release builds?
let r = pixel[0];
let g = pixel[1];
let b = pixel[2];
let a = u16::max_value();

local_data.extend_from_slice(&r.to_ne_bytes());
local_data.extend_from_slice(&g.to_ne_bytes());
local_data.extend_from_slice(&b.to_ne_bytes());
local_data.extend_from_slice(&a.to_ne_bytes());
}

data = local_data;
}
image::DynamicImage::ImageRgba16(i) => {
width = i.width();
height = i.height();
format = TextureFormat::Rgba16Uint;

let raw_data = i.into_raw();

data = raw_data.as_slice().as_bytes().to_owned();
}
}

let texture = Texture::new(
Extent3d::new(width, height, 1),
TextureDimension::D2,
data,
format,
);
load_context.set_default_asset(LoadedAsset::new(texture));
load_context.set_default_asset(LoadedAsset::new(image_to_texture(dyn_img)));
Ok(())
})
}
Expand All @@ -173,3 +60,152 @@ mod tests {
}
}
}

/// Helper method to convert a `DynamicImage` to a `Texture`
pub(crate) fn image_to_texture(dyn_img: image::DynamicImage) -> Texture {
use bevy_core::AsBytes;

let width;
let height;

let data: Vec<u8>;
let format: TextureFormat;

match dyn_img {
image::DynamicImage::ImageLuma8(i) => {
width = i.width();
height = i.height();
format = TextureFormat::R8Unorm;

data = i.into_raw();
}
image::DynamicImage::ImageLumaA8(i) => {
width = i.width();
height = i.height();
format = TextureFormat::Rg8Unorm;

data = i.into_raw();
}
image::DynamicImage::ImageRgb8(i) => {
let i = image::DynamicImage::ImageRgb8(i).into_rgba8();
width = i.width();
height = i.height();
format = TextureFormat::Rgba8UnormSrgb;

data = i.into_raw();
}
image::DynamicImage::ImageRgba8(i) => {
width = i.width();
height = i.height();
format = TextureFormat::Rgba8UnormSrgb;

data = i.into_raw();
}
image::DynamicImage::ImageBgr8(i) => {
let i = image::DynamicImage::ImageBgr8(i).into_bgra8();

width = i.width();
height = i.height();
format = TextureFormat::Bgra8UnormSrgb;

data = i.into_raw();
}
image::DynamicImage::ImageBgra8(i) => {
width = i.width();
height = i.height();
format = TextureFormat::Bgra8UnormSrgb;

data = i.into_raw();
}
image::DynamicImage::ImageLuma16(i) => {
width = i.width();
height = i.height();
format = TextureFormat::R16Uint;

let raw_data = i.into_raw();

data = raw_data.as_slice().as_bytes().to_owned();
}
image::DynamicImage::ImageLumaA16(i) => {
width = i.width();
height = i.height();
format = TextureFormat::Rg16Uint;

let raw_data = i.into_raw();

data = raw_data.as_slice().as_bytes().to_owned();
}

image::DynamicImage::ImageRgb16(image) => {
width = image.width();
height = image.height();
format = TextureFormat::Rgba16Uint;

let mut local_data =
Vec::with_capacity(width as usize * height as usize * format.pixel_size());

for pixel in image.into_raw().chunks_exact(3) {
// TODO unsafe_get in release builds?
let r = pixel[0];
let g = pixel[1];
let b = pixel[2];
let a = u16::max_value();

local_data.extend_from_slice(&r.to_ne_bytes());
local_data.extend_from_slice(&g.to_ne_bytes());
local_data.extend_from_slice(&b.to_ne_bytes());
local_data.extend_from_slice(&a.to_ne_bytes());
}

data = local_data;
}
image::DynamicImage::ImageRgba16(i) => {
width = i.width();
height = i.height();
format = TextureFormat::Rgba16Uint;

let raw_data = i.into_raw();

data = raw_data.as_slice().as_bytes().to_owned();
}
}

Texture::new(
Extent3d::new(width, height, 1),
TextureDimension::D2,
data,
format,
)
}

/// Helper method to convert a `Texture` to a `DynamicImage`. Not all `Texture` formats are
/// covered, it will return `None` if the format is not supported
pub(crate) fn texture_to_image(texture: &Texture) -> Option<image::DynamicImage> {
match texture.format {
TextureFormat::R8Unorm => image::ImageBuffer::from_raw(
texture.size.width,
texture.size.height,
texture.data.clone(),
)
.map(image::DynamicImage::ImageLuma8),
TextureFormat::Rg8Unorm => image::ImageBuffer::from_raw(
texture.size.width,
texture.size.height,
texture.data.clone(),
)
.map(image::DynamicImage::ImageLumaA8),
TextureFormat::Rgba8UnormSrgb => image::ImageBuffer::from_raw(
texture.size.width,
texture.size.height,
texture.data.clone(),
)
.map(image::DynamicImage::ImageRgba8),
TextureFormat::Bgra8UnormSrgb => image::ImageBuffer::from_raw(
texture.size.width,
texture.size.height,
texture.data.clone(),
)
.map(image::DynamicImage::ImageBgra8),
_ => None,
}
}
31 changes: 31 additions & 0 deletions crates/bevy_render/src/texture/texture.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -125,6 +125,37 @@ impl Texture {
});
}

/// Convert a texture from a format to another
/// Only a few formats are supported as input and output:
/// - `TextureFormat::R8Unorm`
/// - `TextureFormat::Rg8Unorm`
/// - `TextureFormat::Rgba8UnormSrgb`
/// - `TextureFormat::Bgra8UnormSrgb`
#[cfg(any(
feature = "png",
feature = "dds",
feature = "tga",
feature = "jpeg",
feature = "bmp"
))]
pub fn convert(&self, new_format: TextureFormat) -> Option<Self> {
super::texture_to_image(self)
.and_then(|img| match new_format {
TextureFormat::R8Unorm => Some(image::DynamicImage::ImageLuma8(img.into_luma8())),
TextureFormat::Rg8Unorm => {
Some(image::DynamicImage::ImageLumaA8(img.into_luma_alpha8()))
}
TextureFormat::Rgba8UnormSrgb => {
Some(image::DynamicImage::ImageRgba8(img.into_rgba8()))
}
TextureFormat::Bgra8UnormSrgb => {
Some(image::DynamicImage::ImageBgra8(img.into_bgra8()))
}
_ => None,
})
.map(super::image_to_texture)
}

pub fn texture_resource_system(
render_resource_context: Res<Box<dyn RenderResourceContext>>,
textures: Res<Assets<Texture>>,
Expand Down
1 change: 1 addition & 0 deletions crates/bevy_sprite/Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@ bevy_app = { path = "../bevy_app", version = "0.4.0" }
bevy_asset = { path = "../bevy_asset", version = "0.4.0" }
bevy_core = { path = "../bevy_core", version = "0.4.0" }
bevy_ecs = { path = "../bevy_ecs", version = "0.4.0" }
bevy_log = { path = "../bevy_log", version = "0.4.0" }
bevy_math = { path = "../bevy_math", version = "0.4.0" }
bevy_reflect = { path = "../bevy_reflect", version = "0.4.0", features = ["bevy"] }
bevy_render = { path = "../bevy_render", version = "0.4.0" }
Expand Down
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