update to_pygfx (#31)

* update to_pygfx

* try pyside2

* more stuff

* add more drivers

* skip again

* update docs and overload

* update test

* back to pyqt6

Author: tlambert03

.github/workflows/ci.yml

@@ -32,14 +32,14 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.12"]
+        python-version: ["3.8", "3.11"]
         platform: [ubuntu-latest, macos-latest, windows-latest]
         include:
           - python-version: "3.9"
             platform: ubuntu-latest
           - python-version: "3.10"
             platform: ubuntu-latest
-          - python-version: "3.11"
+          - python-version: "3.12"
             platform: ubuntu-latest
 
     steps:
@@ -66,6 +66,7 @@ jobs:
         run: |
           python -m pip install -U pip
           python -m pip install -e .[test,thirdparty] ${{ github.event_name == 'schedule' && '--pre' || ''  }}
+          python -m pip install pyqt6
 
       - name: Run test
         uses: aganders3/headless-gui@v1.2

docs/colormaps.md

@@ -199,8 +199,7 @@ external visualization libraries.  To that end, `cmap.Colormap` provides
     Colormap("viridis").to_pygfx()
     ```
 
-    Returns an instance of `pygfx.TextureView` (unless `as_view` is `False`, in which case
-    a `pygfx.Texture` is returned).
+    Returns an instance of `pygfx.Texture`.
 
 - [plotly](https://plotly.com/python/)
 

pyproject.toml

@@ -54,7 +54,6 @@ thirdparty = [
     "plotly",
     "pydantic",
     "pygfx",
-    "pyqt6",
     "pytest-qt",
     "rich",
     "viscm",

src/cmap/_colormap.py

@@ -472,25 +472,15 @@ def to_vispy(self) -> vispy.color.Colormap:
         """Return a vispy colormap."""
         return _external.to_vispy(self)
 
-    @overload
-    def to_pygfx(
-        self, N: int = ..., *, as_view: Literal[True] = ...
-    ) -> pygfx.TextureView:
-        ...
-
-    @overload
-    def to_pygfx(self, N: int = ..., *, as_view: Literal[False]) -> pygfx.Texture:
-        ...
-
-    def to_pygfx(
-        self, N: int = 256, *, as_view: bool = True
-    ) -> pygfx.TextureView | pygfx.Texture:
-        """Return a pygfx TextureView, or Texture if as_view is False.
-
-        If you want to customize the TextureView, use `as_view == False` and then
-        call `get_view()` on the returned Texture, providing the desired arguments.
-        """
-        return _external.to_pygfx(self, N=N, as_view=as_view)
+    def to_pygfx(self, N: int = 256, *, as_view: bool | None = None) -> pygfx.Texture:
+        """Return a pygfx Texture."""
+        if as_view is not None:
+            warnings.warn(
+                "as_view argument is deprecated and does nothing",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+        return _external.to_pygfx(self, N=N)
 
     def to_napari(self) -> napari.utils.colormaps.Colormap:
         """Return a napari colormap.

src/cmap/_external.py

@@ -52,22 +52,15 @@ def to_vispy(cm: Colormap) -> VispyColormap:
     return Colormap(colors=cm.color_stops.color_array, controls=cm.color_stops.stops)
 
 
-def to_pygfx(
-    cm: Colormap, N: int = 256, *, as_view: bool = True
-) -> pygfx.TextureView | pygfx.Texture:
-    """Return a pygfx TextureView, or Texture if as_view is False.
-
-    If you want to customize the TextureView, use `as_view == False` and then
-    call `get_view()` on the returned Texture, providing the desired arguments.
-    """
+def to_pygfx(cm: Colormap, N: int = 256) -> pygfx.Texture:
+    """Return a pygfx Texture."""
     import pygfx
 
     # TODO: check whether pygfx has it's own stop-aware interpolation,
     # and if so, use that instead of .lut()
     # (get_view has a filter argument... but I don't know whether it will take
     # care of the stops)
-    tex = pygfx.Texture(cm.lut(N).astype(np.float32), dim=1)
-    return tex.get_view() if as_view else tex
+    return pygfx.Texture(cm.lut(N).astype(np.float32), dim=1)
 
 
 def to_plotly(cm: Colormap) -> list[list[float | str]]:

tests/test_third_party.py

@@ -19,6 +19,8 @@
 
 CMAP = Colormap(["black", (0, 1, 0), "00FFFF33", "w"])
 IMG = np.random.rand(10, 10).astype("float32")
+CI = bool(os.getenv("CI"))
+LINUX = sys.platform.startswith("linux")
 
 
 def test_colour_support() -> None:
@@ -79,19 +81,20 @@ def test_plotly() -> None:
     px.imshow(IMG, color_continuous_scale=CMAP.to_plotly())
 
 
-@pytest.mark.skipif(bool(os.getenv("CI")), reason="segfaults")
+@pytest.mark.skipif(CI and LINUX, reason="need to fix drivers")
 def test_pygfx(qapp: "QApplication") -> None:
     from qtpy.QtWidgets import QWidget
 
-    gfx = pytest.importorskip("pygfx")
+    pytest.importorskip("pygfx")
     auto = pytest.importorskip("wgpu.gui.auto")
+    import pygfx as gfx
 
     canvas = auto.WgpuCanvas(size=IMG.shape)
     renderer = gfx.renderers.WgpuRenderer(canvas)
     camera = gfx.OrthographicCamera(*IMG.shape)
-    camera.position.y = IMG.shape[0] / 2
-    camera.position.x = IMG.shape[1] / 2
-    camera.scale.y = -1
+    # camera.position.y = IMG.shape[0] / 2
+    # camera.position.x = IMG.shape[1] / 2
+    # camera.scale.y = -1
 
     scene = gfx.Scene()
     scene.add(