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Auto merge of #9589 - glennw:webrender, r=pcwalton

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Add WebRender integration to Servo.

WebRender is an experimental GPU accelerated rendering backend for Servo.

The WebRender backend can be specified by running Servo with the -w option (otherwise the default rendering backend will be used).

WebRender has many bugs, and missing features - but it is usable to browse most websites - please report any WebRender specific rendering bugs you encounter!

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This commit is contained in:
bors-servo 2016-02-19 00:54:06 +05:30
commit ab07b06823
74 changed files with 2862 additions and 886 deletions
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20
components/net_traits/image/base.rs
View file

@ -5,6 +5,7 @@
use ipc_channel::ipc::IpcSharedMemory;
use piston_image::{self, DynamicImage, GenericImage, ImageFormat};
use stb_image::image as stb_image2;
use util::opts;
use util::vec::byte_swap;
pub use msg::constellation_msg::{Image, ImageMetadata, PixelFormat};
@ -15,14 +16,25 @@ pub use msg::constellation_msg::{Image, ImageMetadata, PixelFormat};
// TODO(pcwalton): Speed up with SIMD, or better yet, find some way to not do this.
fn byte_swap_and_premultiply(data: &mut [u8]) {
let length = data.len();
// No need to pre-multiply alpha when using direct GPU rendering.
let premultiply_alpha = !opts::get().use_webrender;
for i in (0..length).step_by(4) {
let r = data[i + 2];
let g = data[i + 1];
let b = data[i + 0];
let a = data[i + 3];
data[i + 0] = ((r as u32) * (a as u32) / 255) as u8;
data[i + 1] = ((g as u32) * (a as u32) / 255) as u8;
data[i + 2] = ((b as u32) * (a as u32) / 255) as u8;
if premultiply_alpha {
data[i + 0] = ((r as u32) * (a as u32) / 255) as u8;
data[i + 1] = ((g as u32) * (a as u32) / 255) as u8;
data[i + 2] = ((b as u32) * (a as u32) / 255) as u8;
} else {
data[i + 0] = r;
data[i + 1] = g;
data[i + 2] = b;
}
}
}
@ -58,6 +70,7 @@ pub fn load_from_memory(buffer: &[u8]) -> Option<Image> {
height: image.height as u32,
format: PixelFormat::RGBA8,
bytes: IpcSharedMemory::from_bytes(&image.data[..]),
id: None,
})
}
stb_image2::LoadResult::ImageF32(_image) => {
@ -83,6 +96,7 @@ pub fn load_from_memory(buffer: &[u8]) -> Option<Image> {
height: rgba.height(),
format: PixelFormat::RGBA8,
bytes: IpcSharedMemory::from_bytes(&*rgba),
id: None,
})
}
Err(e) => {