doc: Fix a problem which causes the SVG to be blurry.

docs/ldoc.css

@@ -569,3 +569,8 @@ pre .url { color: #272fc2; text-decoration: underline; }
 .summary_row:hover {
     background-color: #f7fbff;
 }
+
+/* CSS for beautiful.fg_normal */
+.svg_stroke, .svg_fill {
+    color: black;
+}

tests/examples/CMakeLists.txt

@@ -237,7 +237,7 @@ function(run_test test_path namespace escaped_content)
         set(OUTPUT_RAW_IMAGE_PATH "${RAW_IMAGE_PATH}.svg")
         set(OUTPUT_IMAGE_PATH "${IMAGE_PATH}.svg")
         escape_string(
-            "![Usage example](../images/AUTOGEN${namespace}_${TEST_FILE_NAME}.svg)\n"
+            "<object data=\"../images/AUTOGEN${namespace}_${TEST_FILE_NAME}.svg\" alt=\"Usage example\" type=\"image/svg+xml\"></object>\n"
             "${TEST_DOC_CONTENT}" TEST_DOC_CONTENT ""
         )
     else()

tests/examples/_postprocess.lua

@@ -25,6 +25,8 @@ if (not i) or (not o) then return end
 
 local line, count = i:read("*line"), 0
 
+local add_link = false
+
 while line do
     -- Deduplicate and concatenate the classes.
     local classes = {}
@@ -60,6 +62,13 @@ while line do
     end
 
     o:write(line .. "\n")
+
+    -- Add the stylesheet.
+    if line:sub(1, 6) == "<?xml " then
+        o:write('<?xml-stylesheet href="../ldoc.css" type="text/css"?>\n')
+    end
+
+    -- Next line.
     line = i:read("*line")
 end