perf!: faster image preview with optimized magick arguments (#2533)

Co-authored-by: sxyazi <sxyazi@gmail.com>

yazi-config/preset/yazi-default.toml

@@ -98,7 +98,8 @@ spotters = [
 	{ mime = "text/*", run = "code" },
 	{ mime = "application/{mbox,javascript,wine-extension-ini}", run = "code" },
 	# Image
-	{ mime = "image/{avif,hei?,jxl,svg+xml}", run = "magick" },
+	{ mime = "image/{avif,hei?,jxl}", run = "magick" },
+	{ mime = "image/svg+xml", run = "svg" },
 	{ mime = "image/*", run = "image" },
 	# Video
 	{ mime = "video/*", run = "video" },
@@ -107,7 +108,8 @@ spotters = [
 ]
 preloaders = [
 	# Image
-	{ mime = "image/{avif,hei?,jxl,svg+xml}", run = "magick" },
+	{ mime = "image/{avif,hei?,jxl}", run = "magick" },
+	{ mime = "image/svg+xml", run = "svg" },
 	{ mime = "image/*", run = "image" },
 	# Video
 	{ mime = "video/*", run = "video" },
@@ -125,7 +127,8 @@ previewers = [
 	# JSON
 	{ mime = "application/{json,ndjson}", run = "json" },
 	# Image
-	{ mime = "image/{avif,hei?,jxl,svg+xml}", run = "magick" },
+	{ mime = "image/{avif,hei?,jxl}", run = "magick" },
+	{ mime = "image/svg+xml", run = "svg" },
 	{ mime = "image/*", run = "image" },
 	# Video
 	{ mime = "video/*", run = "video" },

yazi-plugin/preset/plugins/magick.lua

@@ -24,24 +24,19 @@ function M:preload(job)
 		return true
 	end
 
-	local cmd = Command("magick"):args {
+	local cmd = M.with_env()
-		"-density",
+	if job.args.flatten then
-		200,
+		cmd = cmd:arg("-flatten")
-		tostring(job.file.url),
-		"-flatten",
-		"-resize",
-		string.format("%dx%d^", rt.preview.max_width, rt.preview.max_height),
-		"-quality",
-		rt.preview.image_quality,
-		"-auto-orient",
-		"JPG:" .. tostring(cache),
-	}
-
-	if rt.tasks.image_alloc > 0 then
-		cmd = cmd:env("MAGICK_MEMORY_LIMIT", rt.tasks.image_alloc)
 	end
 
-	local status, err = cmd:env("MAGICK_THREAD_LIMIT", 1):status()
+	-- stylua: ignore
+	local status, err = cmd:args {
+		tostring(job.file.url), "-auto-orient", "-strip",
+		"-sample", string.format("%dx%d>", rt.preview.max_width, rt.preview.max_height),
+		"-quality", rt.preview.image_quality,
+		string.format("JPG:%s", cache),
+	}:status()
+
 	if status then
 		return status.success
 	else
@@ -51,4 +46,12 @@ end
 
 function M:spot(job) require("file"):spot(job) end
 
+function M.with_env()
+	local cmd = Command("magick"):env("MAGICK_THREAD_LIMIT", 1)
+	if rt.tasks.image_alloc > 0 then
+		cmd = cmd:env("MAGICK_MEMORY_LIMIT", rt.tasks.image_alloc)
+	end
+	return cmd
+end
+
 return M

yazi-plugin/preset/plugins/svg.lua

@@ -0,0 +1,46 @@
+local M = {}
+
+function M:peek(job)
+	local start, cache = os.clock(), ya.file_cache(job)
+	if not cache then
+		return
+	end
+
+	local ok, err = self:preload(job)
+	if not ok or err then
+		return
+	end
+
+	ya.sleep(math.max(0, rt.preview.image_delay / 1000 + start - os.clock()))
+	ya.image_show(cache, job.area)
+	ya.preview_widgets(job, {})
+end
+
+function M:seek() end
+
+function M:preload(job)
+	local cache = ya.file_cache(job)
+	if not cache or fs.cha(cache) then
+		return true
+	end
+
+	-- stylua: ignore
+	local cmd = require("magick").with_env():args {
+		"-density", 200,
+		tostring(job.file.url), "-strip",
+		"-resize", string.format("%dx%d^", rt.preview.max_width, rt.preview.max_height),
+		"-quality", rt.preview.image_quality,
+		string.format("JPG:%s", cache),
+	}
+
+	local status, err = cmd:status()
+	if status then
+		return status.success
+	else
+		return true, Err("Failed to start `magick`, error: %s", err)
+	end
+end
+
+function M:spot(job) require("file"):spot(job) end
+
+return M

yazi-plugin/src/loader/loader.rs

@@ -42,6 +42,7 @@ impl Default for Loader {
 			("noop".to_owned(), preset!("plugins/noop").into()),
 			("pdf".to_owned(), preset!("plugins/pdf").into()),
 			("session".to_owned(), preset!("plugins/session").into()),
+			("svg".to_owned(), preset!("plugins/svg").into()),
 			("video".to_owned(), preset!("plugins/video").into()),
 			("zoxide".to_owned(), preset!("plugins/zoxide").into()),
 		]);