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Avoid drawing while canvases without contexts.

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This commit is contained in:
Daosheng Mu 2016-04-28 07:03:45 +08:00
parent 77553ab42c
commit b7e05b4a9d
1 changed files with 3 additions and 9 deletions
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12
components/layout/display_list_builder.rs
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@ -13,7 +13,7 @@
use app_units::{Au, AU_PER_PX};
use azure::azure_hl::Color;
use block::{BlockFlow, BlockStackingContextType};
use canvas_traits::{CanvasMsg, CanvasPixelData, CanvasData, FromLayoutMsg};
use canvas_traits::{CanvasMsg, CanvasData, FromLayoutMsg};
use context::LayoutContext;
use euclid::num::Zero;
use euclid::{Matrix4D, Point2D, Point3D, Rect, SideOffsets2D, Size2D};
@ -34,7 +34,7 @@ use gfx::paint_thread::THREAD_TINT_COLORS;
use gfx::text::glyph::CharIndex;
use gfx_traits::{color, ScrollPolicy};
use inline::{FIRST_FRAGMENT_OF_ELEMENT, InlineFlow, LAST_FRAGMENT_OF_ELEMENT};
use ipc_channel::ipc::{self, IpcSharedMemory};
use ipc_channel::ipc::{self};
use list_item::ListItemFlow;
use model::{self, MaybeAuto, ToGfxMatrix};
use net_traits::image::base::PixelFormat;
@ -1259,13 +1259,7 @@ impl FragmentDisplayListBuilding for Fragment {
FromLayoutMsg::SendData(sender))).unwrap();
receiver.recv().unwrap()
},
None => CanvasData::Pixels(CanvasPixelData {
image_data: IpcSharedMemory::from_byte(0xFFu8,
(computed_width *
computed_height * 4)
as usize),
image_key: None,
}),
None => return,
};
let base = state.create_base_display_item(