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Implement enough of 3d transforms spec to run the CSS FPS demo.

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This commit is contained in:
Glenn Watson 2015-06-18 13:06:31 +10:00
parent d86c587925
commit 39ddbbb0e1
19 changed files with 894 additions and 145 deletions
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74
components/gfx/display_list/mod.rs
View file

@ -32,7 +32,7 @@ use euclid::approxeq::ApproxEq;
use euclid::num::Zero;
use libc::uintptr_t;
use paint_task::PaintLayer;
use msg::compositor_msg::LayerId;
use msg::compositor_msg::{LayerId, LayerKind};
use net_traits::image::base::Image;
use util::opts;
use util::cursor::Cursor;
@ -246,6 +246,12 @@ pub struct StackingContext {
/// A transform to be applied to this stacking context.
pub transform: Matrix4,
/// The perspective matrix to be applied to children.
pub perspective: Matrix4,
/// Whether this stacking context creates a new 3d rendering context.
pub establishes_3d_context: bool,
}
impl StackingContext {
@ -255,30 +261,40 @@ impl StackingContext {
bounds: &Rect<Au>,
overflow: &Rect<Au>,
z_index: i32,
transform: &Matrix4,
filters: filter::T,
blend_mode: mix_blend_mode::T,
layer: Option<Arc<PaintLayer>>)
layer: Option<Arc<PaintLayer>>,
transform: Matrix4,
perspective: Matrix4,
establishes_3d_context: bool)
-> StackingContext {
StackingContext {
display_list: display_list,
layer: layer,
bounds: *bounds,
overflow: *overflow,
z_index: z_index,
transform: *transform,
filters: filters,
blend_mode: blend_mode,
layer: layer,
transform: transform,
perspective: perspective,
establishes_3d_context: establishes_3d_context,
}
}
/// Draws the stacking context in the proper order according to the steps in CSS 2.1 § E.2.
pub fn optimize_and_draw_into_context(&self,
paint_context: &mut PaintContext,
tile_bounds: &Rect<AzFloat>,
transform: &Matrix4,
clip_rect: Option<&Rect<Au>>) {
let transform = transform.mul(&self.transform);
pub fn draw_into_context(&self,
display_list: &DisplayList,
paint_context: &mut PaintContext,
tile_bounds: &Rect<AzFloat>,
transform: &Matrix4,
clip_rect: Option<&Rect<Au>>) {
// If a layer is being used, the transform for this layer
// will be handled by the compositor.
let transform = match self.layer {
Some(..) => *transform,
None => transform.mul(&self.transform),
};
let temporary_draw_target =
paint_context.get_or_create_temporary_draw_target(&self.filters, self.blend_mode);
{
@ -289,12 +305,9 @@ impl StackingContext {
screen_rect: paint_context.screen_rect,
clip_rect: clip_rect.map(|clip_rect| *clip_rect),
transient_clip: None,
layer_kind: paint_context.layer_kind,
};
// Optimize the display list to throw out out-of-bounds display items and so forth.
let display_list =
DisplayListOptimizer::new(tile_bounds).optimize(&*self.display_list);
if opts::get().dump_display_list_optimized {
println!("**** optimized display list. Tile bounds: {:?}", tile_bounds);
display_list.print_items("*".to_owned());
@ -409,6 +422,35 @@ impl StackingContext {
paint_context.draw_temporary_draw_target_if_necessary(&temporary_draw_target,
&self.filters,
self.blend_mode)
}
/// Optionally optimize and then draws the stacking context.
pub fn optimize_and_draw_into_context(&self,
paint_context: &mut PaintContext,
tile_bounds: &Rect<AzFloat>,
transform: &Matrix4,
clip_rect: Option<&Rect<Au>>) {
// TODO(gw): This is a hack to avoid running the DL optimizer
// on 3d transformed tiles. We should have a better solution
// than just disabling the opts here.
if paint_context.layer_kind == LayerKind::Layer3D {
self.draw_into_context(&self.display_list,
paint_context,
tile_bounds,
transform,
clip_rect);
} else {
// Optimize the display list to throw out out-of-bounds display items and so forth.
let display_list = DisplayListOptimizer::new(tile_bounds).optimize(&*self.display_list);
self.draw_into_context(&display_list,
paint_context,
tile_bounds,
transform,
clip_rect);
}
}
/// Translate the given tile rect into the coordinate system of a child stacking context.
@ -1005,7 +1047,7 @@ impl<'a> Iterator for DisplayItemIterator<'a> {
impl DisplayItem {
/// Paints this display item into the given painting context.
fn draw_into_context(&self, paint_context: &mut PaintContext) {
{
if paint_context.layer_kind == LayerKind::Layer2D {
let this_clip = &self.base().clip;
match paint_context.transient_clip {
Some(ref transient_clip) if transient_clip == this_clip => {}

3
components/gfx/paint_context.rs
View file

@ -29,6 +29,7 @@ use euclid::rect::Rect;
use euclid::side_offsets::SideOffsets2D;
use euclid::size::Size2D;
use libc::types::common::c99::uint32_t;
use msg::compositor_msg::LayerKind;
use net_traits::image::base::Image;
use png::PixelsByColorType;
use std::default::Default;
@ -54,6 +55,8 @@ pub struct PaintContext<'a> {
/// clipping region used by the last display item. We cache the last value so that we avoid
/// pushing and popping clipping regions unnecessarily.
pub transient_clip: Option<ClippingRegion>,
/// A temporary hack to disable clipping optimizations on 3d layers.
pub layer_kind: LayerKind,
}
#[derive(Copy, Clone)]

117
components/gfx/paint_task.rs
View file

@ -21,7 +21,7 @@ use layers::platform::surface::NativeSurface;
use layers::layers::{BufferRequest, LayerBuffer, LayerBufferSet};
use layers;
use canvas_traits::CanvasMsg;
use msg::compositor_msg::{Epoch, FrameTreeId, LayerId};
use msg::compositor_msg::{Epoch, FrameTreeId, LayerId, LayerKind};
use msg::compositor_msg::{LayerProperties, PaintListener, ScrollPolicy};
use msg::constellation_msg::Msg as ConstellationMsg;
use msg::constellation_msg::{ConstellationChan, Failure, PipelineId};
@ -69,6 +69,7 @@ pub struct PaintRequest {
pub scale: f32,
pub layer_id: LayerId,
pub epoch: Epoch,
pub layer_kind: LayerKind,
}
pub enum Msg {
@ -272,10 +273,10 @@ impl<C> PaintTask<C> where C: PaintListener + Send + 'static {
}
let mut replies = Vec::new();
for PaintRequest { buffer_requests, scale, layer_id, epoch }
for PaintRequest { buffer_requests, scale, layer_id, epoch, layer_kind }
in requests.into_iter() {
if self.current_epoch == Some(epoch) {
self.paint(&mut replies, buffer_requests, scale, layer_id);
self.paint(&mut replies, buffer_requests, scale, layer_id, layer_kind);
} else {
debug!("painter epoch mismatch: {:?} != {:?}", self.current_epoch, epoch);
}
@ -405,7 +406,8 @@ impl<C> PaintTask<C> where C: PaintListener + Send + 'static {
replies: &mut Vec<(LayerId, Box<LayerBufferSet>)>,
mut tiles: Vec<BufferRequest>,
scale: f32,
layer_id: LayerId) {
layer_id: LayerId,
layer_kind: LayerKind) {
time::profile(time::ProfilerCategory::Painting, None, self.time_profiler_chan.clone(), || {
// Bail out if there is no appropriate stacking context.
let stacking_context = if let Some(ref stacking_context) = self.root_stacking_context {
@ -429,7 +431,8 @@ impl<C> PaintTask<C> where C: PaintListener + Send + 'static {
tile,
layer_buffer,
stacking_context.clone(),
scale);
scale,
layer_kind);
}
let new_buffers = (0..tile_count).map(|i| {
let thread_id = i % self.worker_threads.len();
@ -450,32 +453,72 @@ impl<C> PaintTask<C> where C: PaintListener + Send + 'static {
};
let mut properties = Vec::new();
build(&mut properties, &**root_stacking_context, &ZERO_POINT);
build(&mut properties,
&**root_stacking_context,
&ZERO_POINT,
&Matrix4::identity(),
&Matrix4::identity(),
None);
self.compositor.initialize_layers_for_pipeline(self.id, properties, self.current_epoch.unwrap());
fn build(properties: &mut Vec<LayerProperties>,
stacking_context: &StackingContext,
page_position: &Point2D<Au>) {
let page_position = stacking_context.bounds.origin + *page_position;
if let Some(ref paint_layer) = stacking_context.layer {
// Layers start at the top left of their overflow rect, as far as the info we give to
// the compositor is concerned.
let overflow_relative_page_position = page_position + stacking_context.overflow.origin;
let layer_position =
Rect::new(Point2D::new(overflow_relative_page_position.x.to_nearest_px() as f32,
overflow_relative_page_position.y.to_nearest_px() as f32),
Size2D::new(stacking_context.overflow.size.width.to_nearest_px() as f32,
stacking_context.overflow.size.height.to_nearest_px() as f32));
properties.push(LayerProperties {
id: paint_layer.id,
rect: layer_position,
background_color: paint_layer.background_color,
scroll_policy: paint_layer.scroll_policy,
})
}
page_position: &Point2D<Au>,
transform: &Matrix4,
perspective: &Matrix4,
parent_id: Option<LayerId>) {
let transform = transform.mul(&stacking_context.transform);
let perspective = perspective.mul(&stacking_context.perspective);
let (next_parent_id, page_position, transform, perspective) = match stacking_context.layer {
Some(ref paint_layer) => {
// Layers start at the top left of their overflow rect, as far as the info we give to
// the compositor is concerned.
let overflow_relative_page_position = *page_position +
stacking_context.bounds.origin +
stacking_context.overflow.origin;
let layer_position =
Rect::new(Point2D::new(overflow_relative_page_position.x.to_nearest_px() as f32,
overflow_relative_page_position.y.to_nearest_px() as f32),
Size2D::new(stacking_context.overflow.size.width.to_nearest_px() as f32,
stacking_context.overflow.size.height.to_nearest_px() as f32));
let establishes_3d_context = stacking_context.establishes_3d_context;
properties.push(LayerProperties {
id: paint_layer.id,
parent_id: parent_id,
rect: layer_position,
background_color: paint_layer.background_color,
scroll_policy: paint_layer.scroll_policy,
transform: transform,
perspective: perspective,
establishes_3d_context: establishes_3d_context,
});
// When there is a new layer, the transforms and origin
// are handled by the compositor.
(Some(paint_layer.id),
Point2D::zero(),
Matrix4::identity(),
Matrix4::identity())
}
None => {
(parent_id,
stacking_context.bounds.origin + *page_position,
transform,
perspective)
}
};
for kid in stacking_context.display_list.children.iter() {
build(properties, &**kid, &page_position)
build(properties,
&**kid,
&page_position,
&transform,
&perspective,
next_parent_id);
}
}
}
@ -522,8 +565,14 @@ impl WorkerThreadProxy {
tile: BufferRequest,
layer_buffer: Option<Box<LayerBuffer>>,
stacking_context: Arc<StackingContext>,
scale: f32) {
let msg = MsgToWorkerThread::PaintTile(thread_id, tile, layer_buffer, stacking_context, scale);
scale: f32,
layer_kind: LayerKind) {
let msg = MsgToWorkerThread::PaintTile(thread_id,
tile,
layer_buffer,
stacking_context,
scale,
layer_kind);
self.sender.send(msg).unwrap()
}
@ -568,8 +617,12 @@ impl WorkerThread {
loop {
match self.receiver.recv().unwrap() {
MsgToWorkerThread::Exit => break,
MsgToWorkerThread::PaintTile(thread_id, tile, layer_buffer, stacking_context, scale) => {
let draw_target = self.optimize_and_paint_tile(thread_id, &tile, stacking_context, scale);
MsgToWorkerThread::PaintTile(thread_id, tile, layer_buffer, stacking_context, scale, layer_kind) => {
let draw_target = self.optimize_and_paint_tile(thread_id,
&tile,
stacking_context,
scale,
layer_kind);
let buffer = self.create_layer_buffer_for_painted_tile(&tile,
layer_buffer,
draw_target,
@ -584,7 +637,8 @@ impl WorkerThread {
thread_id: usize,
tile: &BufferRequest,
stacking_context: Arc<StackingContext>,
scale: f32)
scale: f32,
layer_kind: LayerKind)
-> DrawTarget {
let size = Size2D::new(tile.screen_rect.size.width as i32, tile.screen_rect.size.height as i32);
let draw_target = if !opts::get().gpu_painting {
@ -612,6 +666,7 @@ impl WorkerThread {
screen_rect: tile.screen_rect,
clip_rect: None,
transient_clip: None,
layer_kind: layer_kind,
};
// Apply a translation to start at the boundaries of the stacking context, since the
@ -708,7 +763,7 @@ impl WorkerThread {
enum MsgToWorkerThread {
Exit,
PaintTile(usize, BufferRequest, Option<Box<LayerBuffer>>, Arc<StackingContext>, f32),
PaintTile(usize, BufferRequest, Option<Box<LayerBuffer>>, Arc<StackingContext>, f32, LayerKind),
}
enum MsgFromWorkerThread {