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use gfx;
use gfx_core::{self, handle, format};
#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
pub(crate) enum TextureFormat {
F32,
RGBA8,
SRGBA,
}
pub(crate) enum TextureArray<R: gfx::Resources> {
F32 {
texture: handle::Texture<R, format::R32>,
view: handle::ShaderResourceView<R, f32>,
},
RGBA8 {
texture: handle::Texture<R, format::R8_G8_B8_A8>,
view: handle::ShaderResourceView<R, [f32; 4]>,
},
SRGBA {
texture: handle::Texture<R, format::R8_G8_B8_A8>,
view: handle::ShaderResourceView<R, [f32; 4]>,
},
}
impl<R: gfx::Resources> TextureArray<R> {
pub fn new<F: gfx::Factory<R>>(
format: TextureFormat,
resolution: u16,
depth: u16,
factory: &mut F,
) -> Self {
match format {
TextureFormat::F32 => {
let texture = factory
.create_texture::<gfx::format::R32>(
gfx::texture::Kind::D2Array(
resolution,
resolution,
depth,
gfx::texture::AaMode::Single,
),
1,
gfx::SHADER_RESOURCE,
gfx::memory::Usage::Dynamic,
Some(gfx::format::ChannelType::Float),
)
.unwrap();
let view = factory
.view_texture_as_shader_resource::<f32>(
&texture,
(0, 0),
gfx::format::Swizzle::new(),
)
.unwrap();
TextureArray::F32 { texture, view }
}
TextureFormat::RGBA8 => {
let texture = factory
.create_texture::<gfx::format::R8_G8_B8_A8>(
gfx::texture::Kind::D2Array(
resolution,
resolution,
depth,
gfx::texture::AaMode::Single,
),
1,
gfx::SHADER_RESOURCE,
gfx::memory::Usage::Dynamic,
Some(gfx::format::ChannelType::Unorm),
)
.unwrap();
let view = factory
.view_texture_as_shader_resource::<gfx::format::Rgba8>(
&texture,
(0, 0),
gfx::format::Swizzle::new(),
)
.unwrap();
TextureArray::RGBA8 { texture, view }
}
TextureFormat::SRGBA => {
let texture = factory
.create_texture::<gfx::format::R8_G8_B8_A8>(
gfx::texture::Kind::D2Array(
resolution,
resolution,
depth,
gfx::texture::AaMode::Single,
),
1,
gfx::SHADER_RESOURCE,
gfx::memory::Usage::Dynamic,
Some(gfx::format::ChannelType::Srgb),
)
.unwrap();
let view = factory
.view_texture_as_shader_resource::<gfx::format::Srgba8>(
&texture,
(0, 0),
gfx::format::Swizzle::new(),
)
.unwrap();
TextureArray::SRGBA { texture, view }
}
}
}
pub fn update_layer<C: gfx_core::command::Buffer<R>>(
&self,
layer: u16,
resolution: u16,
data: &[u8],
encoder: &mut gfx::Encoder<R, C>,
) {
let new_image_info = gfx_core::texture::NewImageInfo {
xoffset: 0,
yoffset: 0,
zoffset: layer,
width: resolution,
height: resolution,
depth: 1,
format: (),
mipmap: 0,
};
match *self {
TextureArray::F32 { ref texture, .. } => {
encoder
.update_texture::<gfx::format::R32, f32>(
texture,
None,
new_image_info,
gfx::memory::cast_slice(data),
)
.unwrap();
}
TextureArray::RGBA8 { ref texture, .. } => {
encoder
.update_texture::<format::R8_G8_B8_A8, gfx::format::Rgba8>(
texture,
None,
new_image_info,
gfx::memory::cast_slice(data),
)
.unwrap();
}
TextureArray::SRGBA { ref texture, .. } => {
encoder
.update_texture::<format::R8_G8_B8_A8, gfx::format::Srgba8>(
texture,
None,
new_image_info,
gfx::memory::cast_slice(data),
)
.unwrap();
}
}
}
}