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use SerializedFontTemplate and IpcBytesReceiver to send font template when responding to GetFontTemplate

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Signed-off-by: s-maurice <51819025+s-maurice@users.noreply.github.com>
This commit is contained in:
s-maurice 2022-03-08 13:57:07 +01:00
parent d551e63b29
commit 58920c7550
1 changed files with 54 additions and 3 deletions
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57
components/gfx/font_cache_thread.rs
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@ -37,6 +37,25 @@ pub struct FontTemplateInfo {
pub font_key: webrender_api::FontKey,
}
#[derive(Debug, Deserialize, Serialize)]
pub struct SerializedFontTemplateInfo {
pub serialized_font_template: SerializedFontTemplate,
pub font_key: webrender_api::FontKey,
}
#[derive(Debug, Deserialize, Serialize)]
pub struct SerializedFontTemplate {
identifier: Atom,
bytes_receiver: ipc_channel::ipc::IpcBytesReceiver,
}
impl SerializedFontTemplate {
pub fn to_font_template_data(&self) -> FontTemplateData {
let font_data = self.bytes_receiver.recv().ok();
FontTemplateData::new(self.identifier.clone(), font_data).unwrap()
}
}
impl FontTemplates {
pub fn new() -> FontTemplates {
FontTemplates { templates: vec![] }
@ -123,7 +142,7 @@ pub enum Command {
/// Reply messages sent from the font cache thread to the FontContext caller.
#[derive(Debug, Deserialize, Serialize)]
pub enum Reply {
GetFontTemplateReply(Option<FontTemplateInfo>),
GetFontTemplateReply(Option<SerializedFontTemplateInfo>),
}
/// The font cache thread itself. It maintains a list of reference counted
@ -177,7 +196,27 @@ impl FontCache {
Command::GetFontTemplate(template_descriptor, family_descriptor, result) => {
let maybe_font_template =
self.find_font_template(&template_descriptor, &family_descriptor);
let _ = result.send(Reply::GetFontTemplateReply(maybe_font_template));
match maybe_font_template {
None => {
let _ = result.send(Reply::GetFontTemplateReply(None));
},
Some(font_template_info) => {
let (bytes_sender, bytes_receiver) =
ipc::bytes_channel().expect("failed to create IPC channel");
let serialized_font_template = SerializedFontTemplate {
identifier: font_template_info.font_template.identifier.clone(),
bytes_receiver,
};
let _ = result.send(Reply::GetFontTemplateReply(Some(
SerializedFontTemplateInfo {
serialized_font_template,
font_key: font_template_info.font_key,
},
)));
let _ = bytes_sender.send(&*font_template_info.font_template.bytes());
},
};
},
Command::GetFontInstance(font_key, size, result) => {
let webrender_api = &self.webrender_api;
@ -545,7 +584,19 @@ impl FontSource for FontCacheThread {
}
match reply.unwrap() {
Reply::GetFontTemplateReply(data) => data,
Reply::GetFontTemplateReply(maybe_serialized_font_template_info) => {
match maybe_serialized_font_template_info {
None => None,
Some(serialized_font_template_info) => Some(FontTemplateInfo {
font_template: Arc::new(
serialized_font_template_info
.serialized_font_template
.to_font_template_data(),
),
font_key: serialized_font_template_info.font_key,
}),
}
},
}
}
}