Fixing LaTeX rendering on windows.

runtime-pyside6/LogarithmPlotter/util/latex.py

@@ -195,7 +195,7 @@ class Latex(QObject):
             # self.convert_dvi_to_png(latex_path, export_path+"@4", font_size*4, color)
         img = QImage(export_path)
         # Small hack, not very optimized since we load the image twice, but you can't pass a QImage to QML and expect it to be loaded
-        return f'{export_path}.png,{img.width()},{img.height()}'
+        return f'file:///{export_path}.png,{img.width()},{img.height()}'
 
     @Slot(str, float, QColor, result=str)
     def findPrerendered(self, latex_markup: str, font_size: float, color: QColor) -> str:
@@ -206,7 +206,7 @@ class Latex(QObject):
         data = ""
         if path.exists(export_path + ".png"):
             img = QImage(export_path)
-            data = f'{export_path}.png,{img.width()},{img.height()}'
+            data = f'file:///{export_path}.png,{img.width()},{img.height()}'
         return data
 
     def create_export_path(self, latex_markup: str, font_size: float, color: QColor):

runtime-pyside6/tests/test_latex.py

@@ -47,7 +47,8 @@ def check_render_results(result):
         result = result.toVariant()
     assert type(result) == str
     [path, width, height] = result.split(",")
-    assert exists(path)
+    assert path.startswith("file:///")
+    assert exists(path[len("file:///"):])
     assert match(r"\d+", width)
     assert match(r"\d+", height)
     return True
@@ -92,10 +93,7 @@ class TestLatex:
         latex_obj.renderSync(*args)
         prerendered = latex_obj.findPrerendered(*args)
         assert type(prerendered) == str
-        [path, width, height] = prerendered.split(",")
-        assert exists(path)
-        assert match(r"\d+", width)
-        assert match(r"\d+", height)
+        check_render_results(prerendered)
         prerendered2 = latex_obj.findPrerendered(args[0], args[1]+2, args[2])
         assert prerendered2 == ""