f0560b8e78
Fixes #14993 (maybe). Adds a system ordering constraint that was missed in the refactor in #14833. The theory here is that the single threaded forces a topology that causes the prepare system to run before `prepare_windows` in a way that causes issues. For whatever reason, this appears to be unlikely when multi-threading is enabled.
957 lines
33 KiB
Rust
957 lines
33 KiB
Rust
pub mod visibility;
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pub mod window;
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use bevy_asset::{load_internal_asset, Handle};
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pub use visibility::*;
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pub use window::*;
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use crate::camera::NormalizedRenderTarget;
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use crate::extract_component::ExtractComponentPlugin;
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use crate::{
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camera::{
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CameraMainTextureUsages, ClearColor, ClearColorConfig, Exposure, ExtractedCamera,
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ManualTextureViews, MipBias, TemporalJitter,
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},
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prelude::Shader,
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primitives::Frustum,
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render_asset::RenderAssets,
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render_phase::ViewRangefinder3d,
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render_resource::{DynamicUniformBuffer, ShaderType, Texture, TextureView},
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renderer::{RenderDevice, RenderQueue},
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texture::{
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BevyDefault, CachedTexture, ColorAttachment, DepthAttachment, GpuImage,
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OutputColorAttachment, TextureCache,
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},
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Render, RenderApp, RenderSet,
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};
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use bevy_app::{App, Plugin};
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use bevy_color::LinearRgba;
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use bevy_derive::{Deref, DerefMut};
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use bevy_ecs::prelude::*;
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use bevy_math::{mat3, vec2, vec3, Mat3, Mat4, UVec4, Vec2, Vec3, Vec4, Vec4Swizzles};
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use bevy_reflect::{std_traits::ReflectDefault, Reflect};
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use bevy_render_macros::ExtractComponent;
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use bevy_transform::components::GlobalTransform;
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use bevy_utils::{hashbrown::hash_map::Entry, HashMap};
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use std::{
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ops::Range,
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sync::{
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atomic::{AtomicUsize, Ordering},
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Arc,
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},
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};
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use wgpu::{
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BufferUsages, Extent3d, RenderPassColorAttachment, RenderPassDepthStencilAttachment, StoreOp,
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TextureDescriptor, TextureDimension, TextureFormat, TextureUsages,
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};
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pub const VIEW_TYPE_HANDLE: Handle<Shader> = Handle::weak_from_u128(15421373904451797197);
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/// The matrix that converts from the RGB to the LMS color space.
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///
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/// To derive this, first we convert from RGB to [CIE 1931 XYZ]:
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///
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/// ```text
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/// ⎡ X ⎤ ⎡ 0.490 0.310 0.200 ⎤ ⎡ R ⎤
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/// ⎢ Y ⎥ = ⎢ 0.177 0.812 0.011 ⎥ ⎢ G ⎥
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/// ⎣ Z ⎦ ⎣ 0.000 0.010 0.990 ⎦ ⎣ B ⎦
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/// ```
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///
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/// Then we convert to LMS according to the [CAM16 standard matrix]:
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///
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/// ```text
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/// ⎡ L ⎤ ⎡ 0.401 0.650 -0.051 ⎤ ⎡ X ⎤
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/// ⎢ M ⎥ = ⎢ -0.250 1.204 0.046 ⎥ ⎢ Y ⎥
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/// ⎣ S ⎦ ⎣ -0.002 0.049 0.953 ⎦ ⎣ Z ⎦
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/// ```
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///
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/// The resulting matrix is just the concatenation of these two matrices, to do
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/// the conversion in one step.
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///
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/// [CIE 1931 XYZ]: https://en.wikipedia.org/wiki/CIE_1931_color_space
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/// [CAM16 standard matrix]: https://en.wikipedia.org/wiki/LMS_color_space
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static RGB_TO_LMS: Mat3 = mat3(
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vec3(0.311692, 0.0905138, 0.00764433),
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vec3(0.652085, 0.901341, 0.0486554),
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vec3(0.0362225, 0.00814478, 0.943700),
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);
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/// The inverse of the [`RGB_TO_LMS`] matrix, converting from the LMS color
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/// space back to RGB.
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static LMS_TO_RGB: Mat3 = mat3(
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vec3(4.06305, -0.40791, -0.0118812),
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vec3(-2.93241, 1.40437, -0.0486532),
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vec3(-0.130646, 0.00353630, 1.0605344),
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);
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/// The [CIE 1931] *xy* chromaticity coordinates of the [D65 white point].
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///
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/// [CIE 1931]: https://en.wikipedia.org/wiki/CIE_1931_color_space
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/// [D65 white point]: https://en.wikipedia.org/wiki/Standard_illuminant#D65_values
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static D65_XY: Vec2 = vec2(0.31272, 0.32903);
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/// The [D65 white point] in [LMS color space].
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///
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/// [LMS color space]: https://en.wikipedia.org/wiki/LMS_color_space
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/// [D65 white point]: https://en.wikipedia.org/wiki/Standard_illuminant#D65_values
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static D65_LMS: Vec3 = vec3(0.975538, 1.01648, 1.08475);
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pub struct ViewPlugin;
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impl Plugin for ViewPlugin {
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fn build(&self, app: &mut App) {
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load_internal_asset!(app, VIEW_TYPE_HANDLE, "view.wgsl", Shader::from_wgsl);
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app.register_type::<InheritedVisibility>()
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.register_type::<ViewVisibility>()
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.register_type::<Msaa>()
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.register_type::<NoFrustumCulling>()
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.register_type::<RenderLayers>()
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.register_type::<Visibility>()
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.register_type::<VisibleEntities>()
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.register_type::<ColorGrading>()
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// NOTE: windows.is_changed() handles cases where a window was resized
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.add_plugins((
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ExtractComponentPlugin::<Msaa>::default(),
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VisibilityPlugin,
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VisibilityRangePlugin,
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));
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if let Some(render_app) = app.get_sub_app_mut(RenderApp) {
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render_app.add_systems(
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Render,
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(
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prepare_view_attachments
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.in_set(RenderSet::ManageViews)
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.before(prepare_view_targets)
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.after(prepare_windows),
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prepare_view_targets
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.in_set(RenderSet::ManageViews)
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.after(prepare_windows)
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.after(crate::render_asset::prepare_assets::<GpuImage>)
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.ambiguous_with(crate::camera::sort_cameras), // doesn't use `sorted_camera_index_for_target`
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prepare_view_uniforms.in_set(RenderSet::PrepareResources),
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),
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);
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}
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}
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fn finish(&self, app: &mut App) {
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if let Some(render_app) = app.get_sub_app_mut(RenderApp) {
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render_app
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.init_resource::<ViewUniforms>()
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.init_resource::<ViewTargetAttachments>();
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}
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}
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}
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/// Configuration resource for [Multi-Sample Anti-Aliasing](https://en.wikipedia.org/wiki/Multisample_anti-aliasing).
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///
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/// The number of samples to run for Multi-Sample Anti-Aliasing for a given camera. Higher numbers
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/// result in smoother edges.
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///
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/// Defaults to 4 samples. Some advanced rendering features may require that MSAA be disabled.
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///
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/// Note that web currently only supports 1 or 4 samples.
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#[derive(
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Component,
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Default,
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Clone,
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Copy,
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ExtractComponent,
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Reflect,
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PartialEq,
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PartialOrd,
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Eq,
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Hash,
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Debug,
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)]
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#[reflect(Component, Default)]
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pub enum Msaa {
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Off = 1,
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Sample2 = 2,
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#[default]
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Sample4 = 4,
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Sample8 = 8,
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}
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impl Msaa {
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#[inline]
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pub fn samples(&self) -> u32 {
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*self as u32
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}
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}
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#[derive(Component)]
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pub struct ExtractedView {
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pub clip_from_view: Mat4,
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pub world_from_view: GlobalTransform,
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// The view-projection matrix. When provided it is used instead of deriving it from
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// `projection` and `transform` fields, which can be helpful in cases where numerical
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// stability matters and there is a more direct way to derive the view-projection matrix.
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pub clip_from_world: Option<Mat4>,
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pub hdr: bool,
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// uvec4(origin.x, origin.y, width, height)
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pub viewport: UVec4,
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pub color_grading: ColorGrading,
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}
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impl ExtractedView {
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/// Creates a 3D rangefinder for a view
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pub fn rangefinder3d(&self) -> ViewRangefinder3d {
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ViewRangefinder3d::from_world_from_view(&self.world_from_view.compute_matrix())
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}
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}
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/// Configures filmic color grading parameters to adjust the image appearance.
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///
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/// Color grading is applied just before tonemapping for a given
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/// [`Camera`](crate::camera::Camera) entity, with the sole exception of the
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/// `post_saturation` value in [`ColorGradingGlobal`], which is applied after
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/// tonemapping.
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#[derive(Component, Reflect, Debug, Default, Clone)]
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#[reflect(Component, Default)]
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pub struct ColorGrading {
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/// Filmic color grading values applied to the image as a whole (as opposed
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/// to individual sections, like shadows and highlights).
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pub global: ColorGradingGlobal,
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/// Color grading values that are applied to the darker parts of the image.
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///
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/// The cutoff points can be customized with the
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/// [`ColorGradingGlobal::midtones_range`] field.
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pub shadows: ColorGradingSection,
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/// Color grading values that are applied to the parts of the image with
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/// intermediate brightness.
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///
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/// The cutoff points can be customized with the
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/// [`ColorGradingGlobal::midtones_range`] field.
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pub midtones: ColorGradingSection,
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/// Color grading values that are applied to the lighter parts of the image.
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///
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/// The cutoff points can be customized with the
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/// [`ColorGradingGlobal::midtones_range`] field.
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pub highlights: ColorGradingSection,
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}
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/// Filmic color grading values applied to the image as a whole (as opposed to
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/// individual sections, like shadows and highlights).
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#[derive(Clone, Debug, Reflect)]
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#[reflect(Default)]
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pub struct ColorGradingGlobal {
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/// Exposure value (EV) offset, measured in stops.
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pub exposure: f32,
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/// An adjustment made to the [CIE 1931] chromaticity *x* value.
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///
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/// Positive values make the colors redder. Negative values make the colors
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/// bluer. This has no effect on luminance (brightness).
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///
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/// [CIE 1931]: https://en.wikipedia.org/wiki/CIE_1931_color_space#CIE_xy_chromaticity_diagram_and_the_CIE_xyY_color_space
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pub temperature: f32,
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/// An adjustment made to the [CIE 1931] chromaticity *y* value.
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///
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/// Positive values make the colors more magenta. Negative values make the
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/// colors greener. This has no effect on luminance (brightness).
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///
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/// [CIE 1931]: https://en.wikipedia.org/wiki/CIE_1931_color_space#CIE_xy_chromaticity_diagram_and_the_CIE_xyY_color_space
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pub tint: f32,
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/// An adjustment to the [hue], in radians.
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///
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/// Adjusting this value changes the perceived colors in the image: red to
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/// yellow to green to blue, etc. It has no effect on the saturation or
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/// brightness of the colors.
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///
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/// [hue]: https://en.wikipedia.org/wiki/HSL_and_HSV#Formal_derivation
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pub hue: f32,
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/// Saturation adjustment applied after tonemapping.
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/// Values below 1.0 desaturate, with a value of 0.0 resulting in a grayscale image
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/// with luminance defined by ITU-R BT.709
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/// Values above 1.0 increase saturation.
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pub post_saturation: f32,
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/// The luminance (brightness) ranges that are considered part of the
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/// "midtones" of the image.
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///
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/// This affects which [`ColorGradingSection`]s apply to which colors. Note
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/// that the sections smoothly blend into one another, to avoid abrupt
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/// transitions.
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///
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/// The default value is 0.2 to 0.7.
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pub midtones_range: Range<f32>,
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}
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/// The [`ColorGrading`] structure, packed into the most efficient form for the
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/// GPU.
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#[derive(Clone, Copy, Debug, ShaderType)]
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pub struct ColorGradingUniform {
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pub balance: Mat3,
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pub saturation: Vec3,
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pub contrast: Vec3,
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pub gamma: Vec3,
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pub gain: Vec3,
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pub lift: Vec3,
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pub midtone_range: Vec2,
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pub exposure: f32,
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pub hue: f32,
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pub post_saturation: f32,
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}
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/// A section of color grading values that can be selectively applied to
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/// shadows, midtones, and highlights.
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#[derive(Reflect, Debug, Copy, Clone, PartialEq)]
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pub struct ColorGradingSection {
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/// Values below 1.0 desaturate, with a value of 0.0 resulting in a grayscale image
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/// with luminance defined by ITU-R BT.709.
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/// Values above 1.0 increase saturation.
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pub saturation: f32,
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/// Adjusts the range of colors.
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///
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/// A value of 1.0 applies no changes. Values below 1.0 move the colors more
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/// toward a neutral gray. Values above 1.0 spread the colors out away from
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/// the neutral gray.
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pub contrast: f32,
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/// A nonlinear luminance adjustment, mainly affecting the high end of the
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/// range.
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///
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/// This is the *n* exponent in the standard [ASC CDL] formula for color
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/// correction:
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///
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/// ```text
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/// out = (i × s + o)ⁿ
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/// ```
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///
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/// [ASC CDL]: https://en.wikipedia.org/wiki/ASC_CDL#Combined_Function
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pub gamma: f32,
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/// A linear luminance adjustment, mainly affecting the middle part of the
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/// range.
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///
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/// This is the *s* factor in the standard [ASC CDL] formula for color
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/// correction:
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///
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/// ```text
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/// out = (i × s + o)ⁿ
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/// ```
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///
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/// [ASC CDL]: https://en.wikipedia.org/wiki/ASC_CDL#Combined_Function
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pub gain: f32,
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/// A fixed luminance adjustment, mainly affecting the lower part of the
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/// range.
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///
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/// This is the *o* term in the standard [ASC CDL] formula for color
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/// correction:
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///
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/// ```text
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/// out = (i × s + o)ⁿ
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/// ```
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///
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/// [ASC CDL]: https://en.wikipedia.org/wiki/ASC_CDL#Combined_Function
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pub lift: f32,
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}
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impl Default for ColorGradingGlobal {
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fn default() -> Self {
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Self {
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exposure: 0.0,
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temperature: 0.0,
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tint: 0.0,
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hue: 0.0,
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post_saturation: 1.0,
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midtones_range: 0.2..0.7,
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}
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}
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}
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impl Default for ColorGradingSection {
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fn default() -> Self {
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Self {
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saturation: 1.0,
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contrast: 1.0,
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gamma: 1.0,
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gain: 1.0,
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lift: 0.0,
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}
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}
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}
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impl ColorGrading {
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/// Creates a new [`ColorGrading`] instance in which shadows, midtones, and
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/// highlights all have the same set of color grading values.
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pub fn with_identical_sections(
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global: ColorGradingGlobal,
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section: ColorGradingSection,
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) -> ColorGrading {
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ColorGrading {
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global,
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highlights: section,
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midtones: section,
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shadows: section,
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}
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}
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/// Returns an iterator that visits the shadows, midtones, and highlights
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/// sections, in that order.
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pub fn all_sections(&self) -> impl Iterator<Item = &ColorGradingSection> {
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[&self.shadows, &self.midtones, &self.highlights].into_iter()
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}
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/// Applies the given mutating function to the shadows, midtones, and
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/// highlights sections, in that order.
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///
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/// Returns an array composed of the results of such evaluation, in that
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/// order.
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pub fn all_sections_mut(&mut self) -> impl Iterator<Item = &mut ColorGradingSection> {
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[&mut self.shadows, &mut self.midtones, &mut self.highlights].into_iter()
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}
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}
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#[derive(Clone, ShaderType)]
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pub struct ViewUniform {
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pub clip_from_world: Mat4,
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pub unjittered_clip_from_world: Mat4,
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pub world_from_clip: Mat4,
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pub world_from_view: Mat4,
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pub view_from_world: Mat4,
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pub clip_from_view: Mat4,
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pub view_from_clip: Mat4,
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pub world_position: Vec3,
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pub exposure: f32,
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// viewport(x_origin, y_origin, width, height)
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pub viewport: Vec4,
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pub frustum: [Vec4; 6],
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pub color_grading: ColorGradingUniform,
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pub mip_bias: f32,
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}
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#[derive(Resource)]
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pub struct ViewUniforms {
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pub uniforms: DynamicUniformBuffer<ViewUniform>,
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}
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impl FromWorld for ViewUniforms {
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fn from_world(world: &mut World) -> Self {
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let mut uniforms = DynamicUniformBuffer::default();
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uniforms.set_label(Some("view_uniforms_buffer"));
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let render_device = world.resource::<RenderDevice>();
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if render_device.limits().max_storage_buffers_per_shader_stage > 0 {
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uniforms.add_usages(BufferUsages::STORAGE);
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}
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Self { uniforms }
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}
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}
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#[derive(Component)]
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pub struct ViewUniformOffset {
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pub offset: u32,
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}
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#[derive(Component)]
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pub struct ViewTarget {
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main_textures: MainTargetTextures,
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main_texture_format: TextureFormat,
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/// 0 represents `main_textures.a`, 1 represents `main_textures.b`
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/// This is shared across view targets with the same render target
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main_texture: Arc<AtomicUsize>,
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out_texture: OutputColorAttachment,
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}
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/// Contains [`OutputColorAttachment`] used for each target present on any view in the current
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/// frame, after being prepared by [`prepare_view_attachments`]. Users that want to override
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/// the default output color attachment for a specific target can do so by adding a
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/// [`OutputColorAttachment`] to this resource before [`prepare_view_targets`] is called.
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#[derive(Resource, Default, Deref, DerefMut)]
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pub struct ViewTargetAttachments(HashMap<NormalizedRenderTarget, OutputColorAttachment>);
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pub struct PostProcessWrite<'a> {
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pub source: &'a TextureView,
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pub destination: &'a TextureView,
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}
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impl From<ColorGrading> for ColorGradingUniform {
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fn from(component: ColorGrading) -> Self {
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// Compute the balance matrix that will be used to apply the white
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// balance adjustment to an RGB color. Our general approach will be to
|
||
// convert both the color and the developer-supplied white point to the
|
||
// LMS color space, apply the conversion, and then convert back.
|
||
//
|
||
// First, we start with the CIE 1931 *xy* values of the standard D65
|
||
// illuminant:
|
||
// <https://en.wikipedia.org/wiki/Standard_illuminant#D65_values>
|
||
//
|
||
// We then adjust them based on the developer's requested white balance.
|
||
let white_point_xy = D65_XY + vec2(-component.global.temperature, component.global.tint);
|
||
|
||
// Convert the white point from CIE 1931 *xy* to LMS. First, we convert to XYZ:
|
||
//
|
||
// Y Y
|
||
// Y = 1 X = ─ x Z = ─ (1 - x - y)
|
||
// y y
|
||
//
|
||
// Then we convert from XYZ to LMS color space, using the CAM16 matrix
|
||
// from <https://en.wikipedia.org/wiki/LMS_color_space#Later_CIECAMs>:
|
||
//
|
||
// ⎡ L ⎤ ⎡ 0.401 0.650 -0.051 ⎤ ⎡ X ⎤
|
||
// ⎢ M ⎥ = ⎢ -0.250 1.204 0.046 ⎥ ⎢ Y ⎥
|
||
// ⎣ S ⎦ ⎣ -0.002 0.049 0.953 ⎦ ⎣ Z ⎦
|
||
//
|
||
// The following formula is just a simplification of the above.
|
||
|
||
let white_point_lms = vec3(0.701634, 1.15856, -0.904175)
|
||
+ (vec3(-0.051461, 0.045854, 0.953127)
|
||
+ vec3(0.452749, -0.296122, -0.955206) * white_point_xy.x)
|
||
/ white_point_xy.y;
|
||
|
||
// Now that we're in LMS space, perform the white point scaling.
|
||
let white_point_adjustment = Mat3::from_diagonal(D65_LMS / white_point_lms);
|
||
|
||
// Finally, combine the RGB → LMS → corrected LMS → corrected RGB
|
||
// pipeline into a single 3×3 matrix.
|
||
let balance = LMS_TO_RGB * white_point_adjustment * RGB_TO_LMS;
|
||
|
||
Self {
|
||
balance,
|
||
saturation: vec3(
|
||
component.shadows.saturation,
|
||
component.midtones.saturation,
|
||
component.highlights.saturation,
|
||
),
|
||
contrast: vec3(
|
||
component.shadows.contrast,
|
||
component.midtones.contrast,
|
||
component.highlights.contrast,
|
||
),
|
||
gamma: vec3(
|
||
component.shadows.gamma,
|
||
component.midtones.gamma,
|
||
component.highlights.gamma,
|
||
),
|
||
gain: vec3(
|
||
component.shadows.gain,
|
||
component.midtones.gain,
|
||
component.highlights.gain,
|
||
),
|
||
lift: vec3(
|
||
component.shadows.lift,
|
||
component.midtones.lift,
|
||
component.highlights.lift,
|
||
),
|
||
midtone_range: vec2(
|
||
component.global.midtones_range.start,
|
||
component.global.midtones_range.end,
|
||
),
|
||
exposure: component.global.exposure,
|
||
hue: component.global.hue,
|
||
post_saturation: component.global.post_saturation,
|
||
}
|
||
}
|
||
}
|
||
|
||
#[derive(Component)]
|
||
pub struct GpuCulling;
|
||
|
||
#[derive(Component)]
|
||
pub struct NoCpuCulling;
|
||
|
||
impl ViewTarget {
|
||
pub const TEXTURE_FORMAT_HDR: TextureFormat = TextureFormat::Rgba16Float;
|
||
|
||
/// Retrieve this target's main texture's color attachment.
|
||
pub fn get_color_attachment(&self) -> RenderPassColorAttachment {
|
||
if self.main_texture.load(Ordering::SeqCst) == 0 {
|
||
self.main_textures.a.get_attachment()
|
||
} else {
|
||
self.main_textures.b.get_attachment()
|
||
}
|
||
}
|
||
|
||
/// Retrieve this target's "unsampled" main texture's color attachment.
|
||
pub fn get_unsampled_color_attachment(&self) -> RenderPassColorAttachment {
|
||
if self.main_texture.load(Ordering::SeqCst) == 0 {
|
||
self.main_textures.a.get_unsampled_attachment()
|
||
} else {
|
||
self.main_textures.b.get_unsampled_attachment()
|
||
}
|
||
}
|
||
|
||
/// The "main" unsampled texture.
|
||
pub fn main_texture(&self) -> &Texture {
|
||
if self.main_texture.load(Ordering::SeqCst) == 0 {
|
||
&self.main_textures.a.texture.texture
|
||
} else {
|
||
&self.main_textures.b.texture.texture
|
||
}
|
||
}
|
||
|
||
/// The _other_ "main" unsampled texture.
|
||
/// In most cases you should use [`Self::main_texture`] instead and never this.
|
||
/// The textures will naturally be swapped when [`Self::post_process_write`] is called.
|
||
///
|
||
/// A use case for this is to be able to prepare a bind group for all main textures
|
||
/// ahead of time.
|
||
pub fn main_texture_other(&self) -> &Texture {
|
||
if self.main_texture.load(Ordering::SeqCst) == 0 {
|
||
&self.main_textures.b.texture.texture
|
||
} else {
|
||
&self.main_textures.a.texture.texture
|
||
}
|
||
}
|
||
|
||
/// The "main" unsampled texture.
|
||
pub fn main_texture_view(&self) -> &TextureView {
|
||
if self.main_texture.load(Ordering::SeqCst) == 0 {
|
||
&self.main_textures.a.texture.default_view
|
||
} else {
|
||
&self.main_textures.b.texture.default_view
|
||
}
|
||
}
|
||
|
||
/// The _other_ "main" unsampled texture view.
|
||
/// In most cases you should use [`Self::main_texture_view`] instead and never this.
|
||
/// The textures will naturally be swapped when [`Self::post_process_write`] is called.
|
||
///
|
||
/// A use case for this is to be able to prepare a bind group for all main textures
|
||
/// ahead of time.
|
||
pub fn main_texture_other_view(&self) -> &TextureView {
|
||
if self.main_texture.load(Ordering::SeqCst) == 0 {
|
||
&self.main_textures.b.texture.default_view
|
||
} else {
|
||
&self.main_textures.a.texture.default_view
|
||
}
|
||
}
|
||
|
||
/// The "main" sampled texture.
|
||
pub fn sampled_main_texture(&self) -> Option<&Texture> {
|
||
self.main_textures
|
||
.a
|
||
.resolve_target
|
||
.as_ref()
|
||
.map(|sampled| &sampled.texture)
|
||
}
|
||
|
||
/// The "main" sampled texture view.
|
||
pub fn sampled_main_texture_view(&self) -> Option<&TextureView> {
|
||
self.main_textures
|
||
.a
|
||
.resolve_target
|
||
.as_ref()
|
||
.map(|sampled| &sampled.default_view)
|
||
}
|
||
|
||
#[inline]
|
||
pub fn main_texture_format(&self) -> TextureFormat {
|
||
self.main_texture_format
|
||
}
|
||
|
||
/// Returns `true` if and only if the main texture is [`Self::TEXTURE_FORMAT_HDR`]
|
||
#[inline]
|
||
pub fn is_hdr(&self) -> bool {
|
||
self.main_texture_format == ViewTarget::TEXTURE_FORMAT_HDR
|
||
}
|
||
|
||
/// The final texture this view will render to.
|
||
#[inline]
|
||
pub fn out_texture(&self) -> &TextureView {
|
||
&self.out_texture.view
|
||
}
|
||
|
||
pub fn out_texture_color_attachment(
|
||
&self,
|
||
clear_color: Option<LinearRgba>,
|
||
) -> RenderPassColorAttachment {
|
||
self.out_texture.get_attachment(clear_color)
|
||
}
|
||
|
||
/// The format of the final texture this view will render to
|
||
#[inline]
|
||
pub fn out_texture_format(&self) -> TextureFormat {
|
||
self.out_texture.format
|
||
}
|
||
|
||
/// This will start a new "post process write", which assumes that the caller
|
||
/// will write the [`PostProcessWrite`]'s `source` to the `destination`.
|
||
///
|
||
/// `source` is the "current" main texture. This will internally flip this
|
||
/// [`ViewTarget`]'s main texture to the `destination` texture, so the caller
|
||
/// _must_ ensure `source` is copied to `destination`, with or without modifications.
|
||
/// Failing to do so will cause the current main texture information to be lost.
|
||
pub fn post_process_write(&self) -> PostProcessWrite {
|
||
let old_is_a_main_texture = self.main_texture.fetch_xor(1, Ordering::SeqCst);
|
||
// if the old main texture is a, then the post processing must write from a to b
|
||
if old_is_a_main_texture == 0 {
|
||
self.main_textures.b.mark_as_cleared();
|
||
PostProcessWrite {
|
||
source: &self.main_textures.a.texture.default_view,
|
||
destination: &self.main_textures.b.texture.default_view,
|
||
}
|
||
} else {
|
||
self.main_textures.a.mark_as_cleared();
|
||
PostProcessWrite {
|
||
source: &self.main_textures.b.texture.default_view,
|
||
destination: &self.main_textures.a.texture.default_view,
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
#[derive(Component)]
|
||
pub struct ViewDepthTexture {
|
||
pub texture: Texture,
|
||
attachment: DepthAttachment,
|
||
}
|
||
|
||
impl ViewDepthTexture {
|
||
pub fn new(texture: CachedTexture, clear_value: Option<f32>) -> Self {
|
||
Self {
|
||
texture: texture.texture,
|
||
attachment: DepthAttachment::new(texture.default_view, clear_value),
|
||
}
|
||
}
|
||
|
||
pub fn get_attachment(&self, store: StoreOp) -> RenderPassDepthStencilAttachment {
|
||
self.attachment.get_attachment(store)
|
||
}
|
||
|
||
pub fn view(&self) -> &TextureView {
|
||
&self.attachment.view
|
||
}
|
||
}
|
||
|
||
pub fn prepare_view_uniforms(
|
||
mut commands: Commands,
|
||
render_device: Res<RenderDevice>,
|
||
render_queue: Res<RenderQueue>,
|
||
mut view_uniforms: ResMut<ViewUniforms>,
|
||
views: Query<(
|
||
Entity,
|
||
Option<&ExtractedCamera>,
|
||
&ExtractedView,
|
||
Option<&Frustum>,
|
||
Option<&TemporalJitter>,
|
||
Option<&MipBias>,
|
||
)>,
|
||
) {
|
||
let view_iter = views.iter();
|
||
let view_count = view_iter.len();
|
||
let Some(mut writer) =
|
||
view_uniforms
|
||
.uniforms
|
||
.get_writer(view_count, &render_device, &render_queue)
|
||
else {
|
||
return;
|
||
};
|
||
for (entity, extracted_camera, extracted_view, frustum, temporal_jitter, mip_bias) in &views {
|
||
let viewport = extracted_view.viewport.as_vec4();
|
||
let unjittered_projection = extracted_view.clip_from_view;
|
||
let mut clip_from_view = unjittered_projection;
|
||
|
||
if let Some(temporal_jitter) = temporal_jitter {
|
||
temporal_jitter.jitter_projection(&mut clip_from_view, viewport.zw());
|
||
}
|
||
|
||
let view_from_clip = clip_from_view.inverse();
|
||
let world_from_view = extracted_view.world_from_view.compute_matrix();
|
||
let view_from_world = world_from_view.inverse();
|
||
|
||
let clip_from_world = if temporal_jitter.is_some() {
|
||
clip_from_view * view_from_world
|
||
} else {
|
||
extracted_view
|
||
.clip_from_world
|
||
.unwrap_or_else(|| clip_from_view * view_from_world)
|
||
};
|
||
|
||
// Map Frustum type to shader array<vec4<f32>, 6>
|
||
let frustum = frustum
|
||
.map(|frustum| frustum.half_spaces.map(|h| h.normal_d()))
|
||
.unwrap_or([Vec4::ZERO; 6]);
|
||
|
||
let view_uniforms = ViewUniformOffset {
|
||
offset: writer.write(&ViewUniform {
|
||
clip_from_world,
|
||
unjittered_clip_from_world: unjittered_projection * view_from_world,
|
||
world_from_clip: world_from_view * view_from_clip,
|
||
world_from_view,
|
||
view_from_world,
|
||
clip_from_view,
|
||
view_from_clip,
|
||
world_position: extracted_view.world_from_view.translation(),
|
||
exposure: extracted_camera
|
||
.map(|c| c.exposure)
|
||
.unwrap_or_else(|| Exposure::default().exposure()),
|
||
viewport,
|
||
frustum,
|
||
color_grading: extracted_view.color_grading.clone().into(),
|
||
mip_bias: mip_bias.unwrap_or(&MipBias(0.0)).0,
|
||
}),
|
||
};
|
||
|
||
commands.entity(entity).insert(view_uniforms);
|
||
}
|
||
}
|
||
|
||
#[derive(Clone)]
|
||
struct MainTargetTextures {
|
||
a: ColorAttachment,
|
||
b: ColorAttachment,
|
||
/// 0 represents `main_textures.a`, 1 represents `main_textures.b`
|
||
/// This is shared across view targets with the same render target
|
||
main_texture: Arc<AtomicUsize>,
|
||
}
|
||
|
||
/// Prepares the view target [`OutputColorAttachment`] for each view in the current frame.
|
||
pub fn prepare_view_attachments(
|
||
windows: Res<ExtractedWindows>,
|
||
images: Res<RenderAssets<GpuImage>>,
|
||
manual_texture_views: Res<ManualTextureViews>,
|
||
cameras: Query<&ExtractedCamera>,
|
||
mut view_target_attachments: ResMut<ViewTargetAttachments>,
|
||
) {
|
||
view_target_attachments.clear();
|
||
for camera in cameras.iter() {
|
||
let Some(target) = &camera.target else {
|
||
continue;
|
||
};
|
||
|
||
match view_target_attachments.entry(target.clone()) {
|
||
Entry::Occupied(_) => {}
|
||
Entry::Vacant(entry) => {
|
||
let Some(attachment) = target
|
||
.get_texture_view(&windows, &images, &manual_texture_views)
|
||
.cloned()
|
||
.zip(target.get_texture_format(&windows, &images, &manual_texture_views))
|
||
.map(|(view, format)| {
|
||
OutputColorAttachment::new(view.clone(), format.add_srgb_suffix())
|
||
})
|
||
else {
|
||
continue;
|
||
};
|
||
entry.insert(attachment);
|
||
}
|
||
};
|
||
}
|
||
}
|
||
|
||
pub fn prepare_view_targets(
|
||
mut commands: Commands,
|
||
clear_color_global: Res<ClearColor>,
|
||
render_device: Res<RenderDevice>,
|
||
mut texture_cache: ResMut<TextureCache>,
|
||
cameras: Query<(
|
||
Entity,
|
||
&ExtractedCamera,
|
||
&ExtractedView,
|
||
&CameraMainTextureUsages,
|
||
&Msaa,
|
||
)>,
|
||
view_target_attachments: Res<ViewTargetAttachments>,
|
||
) {
|
||
let mut textures = HashMap::default();
|
||
for (entity, camera, view, texture_usage, msaa) in cameras.iter() {
|
||
let (Some(target_size), Some(target)) = (camera.physical_target_size, &camera.target)
|
||
else {
|
||
continue;
|
||
};
|
||
|
||
let Some(out_attachment) = view_target_attachments.get(target) else {
|
||
continue;
|
||
};
|
||
|
||
let size = Extent3d {
|
||
width: target_size.x,
|
||
height: target_size.y,
|
||
depth_or_array_layers: 1,
|
||
};
|
||
|
||
let main_texture_format = if view.hdr {
|
||
ViewTarget::TEXTURE_FORMAT_HDR
|
||
} else {
|
||
TextureFormat::bevy_default()
|
||
};
|
||
|
||
let clear_color = match camera.clear_color {
|
||
ClearColorConfig::Custom(color) => Some(color),
|
||
ClearColorConfig::None => None,
|
||
_ => Some(clear_color_global.0),
|
||
};
|
||
|
||
let (a, b, sampled, main_texture) = textures
|
||
.entry((camera.target.clone(), view.hdr, msaa))
|
||
.or_insert_with(|| {
|
||
let descriptor = TextureDescriptor {
|
||
label: None,
|
||
size,
|
||
mip_level_count: 1,
|
||
sample_count: 1,
|
||
dimension: TextureDimension::D2,
|
||
format: main_texture_format,
|
||
usage: texture_usage.0,
|
||
view_formats: match main_texture_format {
|
||
TextureFormat::Bgra8Unorm => &[TextureFormat::Bgra8UnormSrgb],
|
||
TextureFormat::Rgba8Unorm => &[TextureFormat::Rgba8UnormSrgb],
|
||
_ => &[],
|
||
},
|
||
};
|
||
let a = texture_cache.get(
|
||
&render_device,
|
||
TextureDescriptor {
|
||
label: Some("main_texture_a"),
|
||
..descriptor
|
||
},
|
||
);
|
||
let b = texture_cache.get(
|
||
&render_device,
|
||
TextureDescriptor {
|
||
label: Some("main_texture_b"),
|
||
..descriptor
|
||
},
|
||
);
|
||
let sampled = if msaa.samples() > 1 {
|
||
let sampled = texture_cache.get(
|
||
&render_device,
|
||
TextureDescriptor {
|
||
label: Some("main_texture_sampled"),
|
||
size,
|
||
mip_level_count: 1,
|
||
sample_count: msaa.samples(),
|
||
dimension: TextureDimension::D2,
|
||
format: main_texture_format,
|
||
usage: TextureUsages::RENDER_ATTACHMENT,
|
||
view_formats: descriptor.view_formats,
|
||
},
|
||
);
|
||
Some(sampled)
|
||
} else {
|
||
None
|
||
};
|
||
let main_texture = Arc::new(AtomicUsize::new(0));
|
||
(a, b, sampled, main_texture)
|
||
});
|
||
|
||
let converted_clear_color = clear_color.map(Into::into);
|
||
|
||
let main_textures = MainTargetTextures {
|
||
a: ColorAttachment::new(a.clone(), sampled.clone(), converted_clear_color),
|
||
b: ColorAttachment::new(b.clone(), sampled.clone(), converted_clear_color),
|
||
main_texture: main_texture.clone(),
|
||
};
|
||
|
||
commands.entity(entity).insert(ViewTarget {
|
||
main_texture: main_textures.main_texture.clone(),
|
||
main_textures,
|
||
main_texture_format,
|
||
out_texture: out_attachment.clone(),
|
||
});
|
||
}
|
||
}
|