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-rw-r--r--gfx/wr/webrender/src/renderer/vertex.rs1154
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diff --git a/gfx/wr/webrender/src/renderer/vertex.rs b/gfx/wr/webrender/src/renderer/vertex.rs
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+++ b/gfx/wr/webrender/src/renderer/vertex.rs
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+//! Rendering logic related to the vertex shaders and their states, uncluding
+//! - Vertex Array Objects
+//! - vertex layout descriptors
+//! - textures bound at vertex stage
+
+use std::{marker::PhantomData, mem, num::NonZeroUsize, ops};
+use api::units::*;
+use crate::{
+ device::{
+ Device, Texture, TextureFilter, TextureUploader, UploadPBOPool, VertexUsageHint, VAO,
+ },
+ frame_builder::Frame,
+ gpu_types::{PrimitiveHeaderI, PrimitiveHeaderF, TransformData},
+ internal_types::Swizzle,
+ render_task::RenderTaskData,
+};
+
+pub const VERTEX_TEXTURE_EXTRA_ROWS: i32 = 10;
+
+pub const MAX_VERTEX_TEXTURE_WIDTH: usize = webrender_build::MAX_VERTEX_TEXTURE_WIDTH;
+
+pub mod desc {
+ use crate::device::{VertexAttribute, VertexAttributeKind, VertexDescriptor};
+
+ pub const PRIM_INSTANCES: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[VertexAttribute {
+ name: "aData",
+ count: 4,
+ kind: VertexAttributeKind::I32,
+ }],
+ };
+
+ pub const BLUR: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ VertexAttribute {
+ name: "aBlurRenderTaskAddress",
+ count: 1,
+ kind: VertexAttributeKind::U16,
+ },
+ VertexAttribute {
+ name: "aBlurSourceTaskAddress",
+ count: 1,
+ kind: VertexAttributeKind::U16,
+ },
+ VertexAttribute {
+ name: "aBlurDirection",
+ count: 1,
+ kind: VertexAttributeKind::I32,
+ },
+ ],
+ };
+
+ pub const LINE: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ VertexAttribute {
+ name: "aTaskRect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aLocalSize",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aWavyLineThickness",
+ count: 1,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aStyle",
+ count: 1,
+ kind: VertexAttributeKind::I32,
+ },
+ VertexAttribute {
+ name: "aAxisSelect",
+ count: 1,
+ kind: VertexAttributeKind::F32,
+ },
+ ],
+ };
+
+ pub const FAST_LINEAR_GRADIENT: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ VertexAttribute {
+ name: "aTaskRect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aColor0",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aColor1",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aAxisSelect",
+ count: 1,
+ kind: VertexAttributeKind::F32,
+ },
+ ],
+ };
+
+ pub const LINEAR_GRADIENT: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ VertexAttribute {
+ name: "aTaskRect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aStartPoint",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aEndPoint",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aScale",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aExtendMode",
+ count: 1,
+ kind: VertexAttributeKind::I32,
+ },
+ VertexAttribute {
+ name: "aGradientStopsAddress",
+ count: 1,
+ kind: VertexAttributeKind::I32,
+ },
+ ],
+ };
+
+ pub const RADIAL_GRADIENT: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ VertexAttribute {
+ name: "aTaskRect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aCenter",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aScale",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aStartRadius",
+ count: 1,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aEndRadius",
+ count: 1,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aXYRatio",
+ count: 1,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aExtendMode",
+ count: 1,
+ kind: VertexAttributeKind::I32,
+ },
+ VertexAttribute {
+ name: "aGradientStopsAddress",
+ count: 1,
+ kind: VertexAttributeKind::I32,
+ },
+ ],
+ };
+
+ pub const CONIC_GRADIENT: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ VertexAttribute {
+ name: "aTaskRect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aCenter",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aScale",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aStartOffset",
+ count: 1,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aEndOffset",
+ count: 1,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aAngle",
+ count: 1,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aExtendMode",
+ count: 1,
+ kind: VertexAttributeKind::I32,
+ },
+ VertexAttribute {
+ name: "aGradientStopsAddress",
+ count: 1,
+ kind: VertexAttributeKind::I32,
+ },
+ ],
+ };
+
+ pub const BORDER: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ VertexAttribute {
+ name: "aTaskOrigin",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aRect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aColor0",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aColor1",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aFlags",
+ count: 1,
+ kind: VertexAttributeKind::I32,
+ },
+ VertexAttribute {
+ name: "aWidths",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aRadii",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipParams1",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipParams2",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ ],
+ };
+
+ pub const SCALE: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ VertexAttribute {
+ name: "aScaleTargetRect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aScaleSourceRect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ ],
+ };
+
+ pub const CLIP_RECT: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ // common clip attributes
+ VertexAttribute {
+ name: "aClipDeviceArea",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipOrigins",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aDevicePixelScale",
+ count: 1,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aTransformIds",
+ count: 2,
+ kind: VertexAttributeKind::I32,
+ },
+ // specific clip attributes
+ VertexAttribute {
+ name: "aClipLocalPos",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipLocalRect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipMode",
+ count: 1,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipRect_TL",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipRadii_TL",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipRect_TR",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipRadii_TR",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipRect_BL",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipRadii_BL",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipRect_BR",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipRadii_BR",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ ],
+ };
+
+ pub const CLIP_BOX_SHADOW: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ // common clip attributes
+ VertexAttribute {
+ name: "aClipDeviceArea",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipOrigins",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aDevicePixelScale",
+ count: 1,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aTransformIds",
+ count: 2,
+ kind: VertexAttributeKind::I32,
+ },
+ // specific clip attributes
+ VertexAttribute {
+ name: "aClipDataResourceAddress",
+ count: 2,
+ kind: VertexAttributeKind::U16,
+ },
+ VertexAttribute {
+ name: "aClipSrcRectSize",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipMode",
+ count: 1,
+ kind: VertexAttributeKind::I32,
+ },
+ VertexAttribute {
+ name: "aStretchMode",
+ count: 2,
+ kind: VertexAttributeKind::I32,
+ },
+ VertexAttribute {
+ name: "aClipDestRect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ ],
+ };
+
+ pub const CLIP_IMAGE: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ // common clip attributes
+ VertexAttribute {
+ name: "aClipDeviceArea",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipOrigins",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aDevicePixelScale",
+ count: 1,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aTransformIds",
+ count: 2,
+ kind: VertexAttributeKind::I32,
+ },
+ // specific clip attributes
+ VertexAttribute {
+ name: "aClipTileRect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aClipDataResourceAddress",
+ count: 2,
+ kind: VertexAttributeKind::U16,
+ },
+ VertexAttribute {
+ name: "aClipLocalRect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ ],
+ };
+
+ pub const GPU_CACHE_UPDATE: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[
+ VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U16Norm,
+ },
+ VertexAttribute {
+ name: "aValue",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ ],
+ instance_attributes: &[],
+ };
+
+ pub const RESOLVE: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[VertexAttribute {
+ name: "aRect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ }],
+ };
+
+ pub const SVG_FILTER: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ VertexAttribute {
+ name: "aFilterRenderTaskAddress",
+ count: 1,
+ kind: VertexAttributeKind::U16,
+ },
+ VertexAttribute {
+ name: "aFilterInput1TaskAddress",
+ count: 1,
+ kind: VertexAttributeKind::U16,
+ },
+ VertexAttribute {
+ name: "aFilterInput2TaskAddress",
+ count: 1,
+ kind: VertexAttributeKind::U16,
+ },
+ VertexAttribute {
+ name: "aFilterKind",
+ count: 1,
+ kind: VertexAttributeKind::U16,
+ },
+ VertexAttribute {
+ name: "aFilterInputCount",
+ count: 1,
+ kind: VertexAttributeKind::U16,
+ },
+ VertexAttribute {
+ name: "aFilterGenericInt",
+ count: 1,
+ kind: VertexAttributeKind::U16,
+ },
+ VertexAttribute {
+ name: "aFilterExtraDataAddress",
+ count: 2,
+ kind: VertexAttributeKind::U16,
+ },
+ ],
+ };
+
+ pub const MASK: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ VertexAttribute {
+ name: "aData",
+ count: 4,
+ kind: VertexAttributeKind::I32,
+ },
+ VertexAttribute {
+ name: "aClipData",
+ count: 4,
+ kind: VertexAttributeKind::I32,
+ },
+ ],
+ };
+
+ pub const VECTOR_STENCIL: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ VertexAttribute {
+ name: "aFromPosition",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aCtrlPosition",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aToPosition",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aFromNormal",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aCtrlNormal",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aToNormal",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aPathID",
+ count: 1,
+ kind: VertexAttributeKind::U16,
+ },
+ VertexAttribute {
+ name: "aPad",
+ count: 1,
+ kind: VertexAttributeKind::U16,
+ },
+ ],
+ };
+
+ pub const VECTOR_COVER: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ VertexAttribute {
+ name: "aTargetRect",
+ count: 4,
+ kind: VertexAttributeKind::I32,
+ },
+ VertexAttribute {
+ name: "aStencilOrigin",
+ count: 2,
+ kind: VertexAttributeKind::I32,
+ },
+ VertexAttribute {
+ name: "aSubpixel",
+ count: 1,
+ kind: VertexAttributeKind::U16,
+ },
+ VertexAttribute {
+ name: "aPad",
+ count: 1,
+ kind: VertexAttributeKind::U16,
+ },
+ ],
+ };
+
+ pub const COMPOSITE: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ VertexAttribute {
+ name: "aLocalRect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aDeviceClipRect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aColor",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aParams",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aUvRect0",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aUvRect1",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aUvRect2",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aTransform",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ ],
+ };
+
+ pub const CLEAR: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ VertexAttribute {
+ name: "aRect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "aColor",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ ],
+ };
+
+ pub const COPY: VertexDescriptor = VertexDescriptor {
+ vertex_attributes: &[VertexAttribute {
+ name: "aPosition",
+ count: 2,
+ kind: VertexAttributeKind::U8Norm,
+ }],
+ instance_attributes: &[
+ VertexAttribute {
+ name: "a_src_rect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "a_dst_rect",
+ count: 4,
+ kind: VertexAttributeKind::F32,
+ },
+ VertexAttribute {
+ name: "a_dst_texture_size",
+ count: 2,
+ kind: VertexAttributeKind::F32,
+ },
+ ],
+ };
+}
+
+#[derive(Debug, Copy, Clone, PartialEq)]
+pub enum VertexArrayKind {
+ Primitive,
+ Blur,
+ ClipImage,
+ ClipRect,
+ ClipBoxShadow,
+ VectorStencil,
+ VectorCover,
+ Border,
+ Scale,
+ LineDecoration,
+ FastLinearGradient,
+ LinearGradient,
+ RadialGradient,
+ ConicGradient,
+ Resolve,
+ SvgFilter,
+ Composite,
+ Clear,
+ Copy,
+ Mask,
+}
+
+pub struct VertexDataTexture<T> {
+ texture: Option<Texture>,
+ format: api::ImageFormat,
+ _marker: PhantomData<T>,
+}
+
+impl<T> VertexDataTexture<T> {
+ pub fn new(format: api::ImageFormat) -> Self {
+ Self {
+ texture: None,
+ format,
+ _marker: PhantomData,
+ }
+ }
+
+ /// Returns a borrow of the GPU texture. Panics if it hasn't been initialized.
+ pub fn texture(&self) -> &Texture {
+ self.texture.as_ref().unwrap()
+ }
+
+ /// Returns an estimate of the GPU memory consumed by this VertexDataTexture.
+ pub fn size_in_bytes(&self) -> usize {
+ self.texture.as_ref().map_or(0, |t| t.size_in_bytes())
+ }
+
+ pub fn update<'a>(
+ &'a mut self,
+ device: &mut Device,
+ texture_uploader: &mut TextureUploader<'a>,
+ data: &mut Vec<T>,
+ ) {
+ debug_assert!(mem::size_of::<T>() % 16 == 0);
+ let texels_per_item = mem::size_of::<T>() / 16;
+ let items_per_row = MAX_VERTEX_TEXTURE_WIDTH / texels_per_item;
+ debug_assert_ne!(items_per_row, 0);
+
+ // Ensure we always end up with a texture when leaving this method.
+ let mut len = data.len();
+ if len == 0 {
+ if self.texture.is_some() {
+ return;
+ }
+ data.reserve(items_per_row);
+ len = items_per_row;
+ } else {
+ // Extend the data array to have enough capacity to upload at least
+ // a multiple of the row size. This ensures memory safety when the
+ // array is passed to OpenGL to upload to the GPU.
+ let extra = len % items_per_row;
+ if extra != 0 {
+ let padding = items_per_row - extra;
+ data.reserve(padding);
+ len += padding;
+ }
+ }
+
+ let needed_height = (len / items_per_row) as i32;
+ let existing_height = self
+ .texture
+ .as_ref()
+ .map_or(0, |t| t.get_dimensions().height);
+
+ // Create a new texture if needed.
+ //
+ // These textures are generally very small, which is why we don't bother
+ // with incremental updates and just re-upload every frame. For most pages
+ // they're one row each, and on stress tests like css-francine they end up
+ // in the 6-14 range. So we size the texture tightly to what we need (usually
+ // 1), and shrink it if the waste would be more than `VERTEX_TEXTURE_EXTRA_ROWS`
+ // rows. This helps with memory overhead, especially because there are several
+ // instances of these textures per Renderer.
+ if needed_height > existing_height
+ || needed_height + VERTEX_TEXTURE_EXTRA_ROWS < existing_height
+ {
+ // Drop the existing texture, if any.
+ if let Some(t) = self.texture.take() {
+ device.delete_texture(t);
+ }
+
+ let texture = device.create_texture(
+ api::ImageBufferKind::Texture2D,
+ self.format,
+ MAX_VERTEX_TEXTURE_WIDTH as i32,
+ // Ensure height is at least two to work around
+ // https://bugs.chromium.org/p/angleproject/issues/detail?id=3039
+ needed_height.max(2),
+ TextureFilter::Nearest,
+ None,
+ );
+ self.texture = Some(texture);
+ }
+
+ // Note: the actual width can be larger than the logical one, with a few texels
+ // of each row unused at the tail. This is needed because there is still hardware
+ // (like Intel iGPUs) that prefers power-of-two sizes of textures ([1]).
+ //
+ // [1] https://software.intel.com/en-us/articles/opengl-performance-tips-power-of-two-textures-have-better-performance
+ let logical_width = if needed_height == 1 {
+ data.len() * texels_per_item
+ } else {
+ MAX_VERTEX_TEXTURE_WIDTH - (MAX_VERTEX_TEXTURE_WIDTH % texels_per_item)
+ };
+
+ let rect = DeviceIntRect::from_size(
+ DeviceIntSize::new(logical_width as i32, needed_height),
+ );
+
+ debug_assert!(len <= data.capacity(), "CPU copy will read out of bounds");
+ texture_uploader.upload(
+ device,
+ self.texture(),
+ rect,
+ None,
+ None,
+ data.as_ptr(),
+ len,
+ );
+ }
+
+ pub fn deinit(mut self, device: &mut Device) {
+ if let Some(t) = self.texture.take() {
+ device.delete_texture(t);
+ }
+ }
+}
+
+pub struct VertexDataTextures {
+ prim_header_f_texture: VertexDataTexture<PrimitiveHeaderF>,
+ prim_header_i_texture: VertexDataTexture<PrimitiveHeaderI>,
+ transforms_texture: VertexDataTexture<TransformData>,
+ render_task_texture: VertexDataTexture<RenderTaskData>,
+}
+
+impl VertexDataTextures {
+ pub fn new() -> Self {
+ VertexDataTextures {
+ prim_header_f_texture: VertexDataTexture::new(api::ImageFormat::RGBAF32),
+ prim_header_i_texture: VertexDataTexture::new(api::ImageFormat::RGBAI32),
+ transforms_texture: VertexDataTexture::new(api::ImageFormat::RGBAF32),
+ render_task_texture: VertexDataTexture::new(api::ImageFormat::RGBAF32),
+ }
+ }
+
+ pub fn update(&mut self, device: &mut Device, pbo_pool: &mut UploadPBOPool, frame: &mut Frame) {
+ let mut texture_uploader = device.upload_texture(pbo_pool);
+ self.prim_header_f_texture.update(
+ device,
+ &mut texture_uploader,
+ &mut frame.prim_headers.headers_float,
+ );
+ self.prim_header_i_texture.update(
+ device,
+ &mut texture_uploader,
+ &mut frame.prim_headers.headers_int,
+ );
+ self.transforms_texture
+ .update(device, &mut texture_uploader, &mut frame.transform_palette);
+ self.render_task_texture.update(
+ device,
+ &mut texture_uploader,
+ &mut frame.render_tasks.task_data,
+ );
+
+ // Flush and drop the texture uploader now, so that
+ // we can borrow the textures to bind them.
+ texture_uploader.flush(device);
+
+ device.bind_texture(
+ super::TextureSampler::PrimitiveHeadersF,
+ &self.prim_header_f_texture.texture(),
+ Swizzle::default(),
+ );
+ device.bind_texture(
+ super::TextureSampler::PrimitiveHeadersI,
+ &self.prim_header_i_texture.texture(),
+ Swizzle::default(),
+ );
+ device.bind_texture(
+ super::TextureSampler::TransformPalette,
+ &self.transforms_texture.texture(),
+ Swizzle::default(),
+ );
+ device.bind_texture(
+ super::TextureSampler::RenderTasks,
+ &self.render_task_texture.texture(),
+ Swizzle::default(),
+ );
+ }
+
+ pub fn size_in_bytes(&self) -> usize {
+ self.prim_header_f_texture.size_in_bytes()
+ + self.prim_header_i_texture.size_in_bytes()
+ + self.transforms_texture.size_in_bytes()
+ + self.render_task_texture.size_in_bytes()
+ }
+
+ pub fn deinit(self, device: &mut Device) {
+ self.transforms_texture.deinit(device);
+ self.prim_header_f_texture.deinit(device);
+ self.prim_header_i_texture.deinit(device);
+ self.render_task_texture.deinit(device);
+ }
+}
+
+pub struct RendererVAOs {
+ prim_vao: VAO,
+ blur_vao: VAO,
+ clip_rect_vao: VAO,
+ clip_box_shadow_vao: VAO,
+ clip_image_vao: VAO,
+ border_vao: VAO,
+ line_vao: VAO,
+ scale_vao: VAO,
+ fast_linear_gradient_vao: VAO,
+ linear_gradient_vao: VAO,
+ radial_gradient_vao: VAO,
+ conic_gradient_vao: VAO,
+ resolve_vao: VAO,
+ svg_filter_vao: VAO,
+ composite_vao: VAO,
+ clear_vao: VAO,
+ copy_vao: VAO,
+ mask_vao: VAO,
+}
+
+impl RendererVAOs {
+ pub fn new(device: &mut Device, indexed_quads: Option<NonZeroUsize>) -> Self {
+ const QUAD_INDICES: [u16; 6] = [0, 1, 2, 2, 1, 3];
+ const QUAD_VERTICES: [[u8; 2]; 4] = [[0, 0], [0xFF, 0], [0, 0xFF], [0xFF, 0xFF]];
+
+ let instance_divisor = if indexed_quads.is_some() { 0 } else { 1 };
+ let prim_vao = device.create_vao(&desc::PRIM_INSTANCES, instance_divisor);
+
+ device.bind_vao(&prim_vao);
+ match indexed_quads {
+ Some(count) => {
+ assert!(count.get() < u16::MAX as usize);
+ let quad_indices = (0 .. count.get() as u16)
+ .flat_map(|instance| QUAD_INDICES.iter().map(move |&index| instance * 4 + index))
+ .collect::<Vec<_>>();
+ device.update_vao_indices(&prim_vao, &quad_indices, VertexUsageHint::Static);
+ let quad_vertices = (0 .. count.get() as u16)
+ .flat_map(|_| QUAD_VERTICES.iter().cloned())
+ .collect::<Vec<_>>();
+ device.update_vao_main_vertices(&prim_vao, &quad_vertices, VertexUsageHint::Static);
+ }
+ None => {
+ device.update_vao_indices(&prim_vao, &QUAD_INDICES, VertexUsageHint::Static);
+ device.update_vao_main_vertices(&prim_vao, &QUAD_VERTICES, VertexUsageHint::Static);
+ }
+ }
+
+ RendererVAOs {
+ blur_vao: device.create_vao_with_new_instances(&desc::BLUR, &prim_vao),
+ clip_rect_vao: device.create_vao_with_new_instances(&desc::CLIP_RECT, &prim_vao),
+ clip_box_shadow_vao: device
+ .create_vao_with_new_instances(&desc::CLIP_BOX_SHADOW, &prim_vao),
+ clip_image_vao: device.create_vao_with_new_instances(&desc::CLIP_IMAGE, &prim_vao),
+ border_vao: device.create_vao_with_new_instances(&desc::BORDER, &prim_vao),
+ scale_vao: device.create_vao_with_new_instances(&desc::SCALE, &prim_vao),
+ line_vao: device.create_vao_with_new_instances(&desc::LINE, &prim_vao),
+ fast_linear_gradient_vao: device.create_vao_with_new_instances(&desc::FAST_LINEAR_GRADIENT, &prim_vao),
+ linear_gradient_vao: device.create_vao_with_new_instances(&desc::LINEAR_GRADIENT, &prim_vao),
+ radial_gradient_vao: device.create_vao_with_new_instances(&desc::RADIAL_GRADIENT, &prim_vao),
+ conic_gradient_vao: device.create_vao_with_new_instances(&desc::CONIC_GRADIENT, &prim_vao),
+ resolve_vao: device.create_vao_with_new_instances(&desc::RESOLVE, &prim_vao),
+ svg_filter_vao: device.create_vao_with_new_instances(&desc::SVG_FILTER, &prim_vao),
+ composite_vao: device.create_vao_with_new_instances(&desc::COMPOSITE, &prim_vao),
+ clear_vao: device.create_vao_with_new_instances(&desc::CLEAR, &prim_vao),
+ copy_vao: device.create_vao_with_new_instances(&desc::COPY, &prim_vao),
+ mask_vao: device.create_vao_with_new_instances(&desc::MASK, &prim_vao),
+ prim_vao,
+ }
+ }
+
+ pub fn deinit(self, device: &mut Device) {
+ device.delete_vao(self.prim_vao);
+ device.delete_vao(self.resolve_vao);
+ device.delete_vao(self.clip_rect_vao);
+ device.delete_vao(self.clip_box_shadow_vao);
+ device.delete_vao(self.clip_image_vao);
+ device.delete_vao(self.fast_linear_gradient_vao);
+ device.delete_vao(self.linear_gradient_vao);
+ device.delete_vao(self.radial_gradient_vao);
+ device.delete_vao(self.conic_gradient_vao);
+ device.delete_vao(self.blur_vao);
+ device.delete_vao(self.line_vao);
+ device.delete_vao(self.border_vao);
+ device.delete_vao(self.scale_vao);
+ device.delete_vao(self.svg_filter_vao);
+ device.delete_vao(self.composite_vao);
+ device.delete_vao(self.clear_vao);
+ device.delete_vao(self.copy_vao);
+ device.delete_vao(self.mask_vao);
+ }
+}
+
+impl ops::Index<VertexArrayKind> for RendererVAOs {
+ type Output = VAO;
+ fn index(&self, kind: VertexArrayKind) -> &VAO {
+ match kind {
+ VertexArrayKind::Primitive => &self.prim_vao,
+ VertexArrayKind::ClipImage => &self.clip_image_vao,
+ VertexArrayKind::ClipRect => &self.clip_rect_vao,
+ VertexArrayKind::ClipBoxShadow => &self.clip_box_shadow_vao,
+ VertexArrayKind::Blur => &self.blur_vao,
+ VertexArrayKind::VectorStencil | VertexArrayKind::VectorCover => unreachable!(),
+ VertexArrayKind::Border => &self.border_vao,
+ VertexArrayKind::Scale => &self.scale_vao,
+ VertexArrayKind::LineDecoration => &self.line_vao,
+ VertexArrayKind::FastLinearGradient => &self.fast_linear_gradient_vao,
+ VertexArrayKind::LinearGradient => &self.linear_gradient_vao,
+ VertexArrayKind::RadialGradient => &self.radial_gradient_vao,
+ VertexArrayKind::ConicGradient => &self.conic_gradient_vao,
+ VertexArrayKind::Resolve => &self.resolve_vao,
+ VertexArrayKind::SvgFilter => &self.svg_filter_vao,
+ VertexArrayKind::Composite => &self.composite_vao,
+ VertexArrayKind::Clear => &self.clear_vao,
+ VertexArrayKind::Copy => &self.copy_vao,
+ VertexArrayKind::Mask => &self.mask_vao,
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-13 21:33:05 +0000