fix: now we are faster again (special-case get_transformed_bound)

TODO.md

@@ -1,7 +1,8 @@
 ## PLAYA 0.2.x
 - [ ] update `pdfplumber` branch and run `pdfplumber` tests in CI
   - [ ] make a separate directory for third party tests
-- [ ] fix incorrect bboxes when rotation/skewing is applied (performance hit...)
+- [x] fix incorrect bboxes when rotation is applied
+- [x] return more useful names for custom colorspaces/patterns
 - [ ] `decode_text` is remarkably slow
 - [ ] `render_char` and `render_string` are also quite slow
 - [ ] remove the rest of the meaningless abuses of `cast`

playa/page.py

@@ -1419,10 +1419,10 @@ def make_path(
             linewidth=gstate.linewidth,
             dash_pattern=gstate.dash.dash,
             dash_phase=gstate.dash.phase,
-            stroking_colorspace=str(gstate.scs),
+            stroking_colorspace=gstate.scs.name,
             stroking_color=gstate.scolor.values,
             stroking_pattern=gstate.scolor.pattern,
-            non_stroking_colorspace=str(gstate.ncs),
+            non_stroking_colorspace=gstate.ncs.name,
             non_stroking_color=gstate.ncolor.values,
             non_stroking_pattern=gstate.ncolor.pattern,
         )
@@ -1604,10 +1604,10 @@ def render_char(
             render_mode=self.textstate.render_mode,
             dash_pattern=self.graphicstate.dash.dash,
             dash_phase=self.graphicstate.dash.phase,
-            stroking_colorspace=str(self.graphicstate.scs),
+            stroking_colorspace=self.graphicstate.scs.name,
             stroking_color=self.graphicstate.scolor.values,
             stroking_pattern=self.graphicstate.scolor.pattern,
-            non_stroking_colorspace=str(self.graphicstate.ncs),
+            non_stroking_colorspace=self.graphicstate.ncs.name,
             non_stroking_color=self.graphicstate.ncolor.values,
             non_stroking_pattern=self.graphicstate.ncolor.pattern,
             mcid=None if self.mcs is None else self.mcs.mcid,

playa/utils.py

@@ -273,6 +273,14 @@ def get_transformed_bound(matrix: Matrix, bbox: Rect) -> Rect:
     """Transform a bounding box and return the rectangle that covers
     the points of the resulting shape."""
     x0, y0, x1, y1 = bbox
+    # No rotation involved, corners are still valid.  FIXME: proof
+    if matrix[1] >= 0 and matrix[2] >= 0:
+        return get_bound(
+            (
+                apply_matrix_pt(matrix, (x0, y0)),
+                apply_matrix_pt(matrix, (x1, y1)),
+            )
+        )
     return get_bound(
         (
             apply_matrix_pt(matrix, (x0, y0)),