fix: revert changs to ImageVolumeJSONGenerator and associated state

cryoet_data_portal_neuroglancer/models/json_generator.py

@@ -191,20 +191,24 @@ def generate_json(self) -> dict:
 class ImageVolumeJSONGenerator(RenderingJSONGenerator):
     """Generates JSON Neuroglancer config for volume rendering."""
 
-    rendering_depth: int  # Ideally, this should be a power of 2
-    contrast_limits: tuple[float, float] = (-64, 64)
-    threedee_contrast_limits: tuple[float, float] = (-64, 64)
-    is_visible: bool = True
+    color: str
+    rendering_depth: int
 
     def __post_init__(self):
         self._type = RenderingTypes.IMAGE
 
     def _get_shader(self) -> dict[str, Any]:
-        shader_builder = ImageShaderBuilder(
-            contrast_limits=self.contrast_limits,
-            threedee_contrast_limits=self.threedee_contrast_limits,
+        shader = (
+            f'#uicontrol vec3 color color(default="{self.color}")\n'
+            f"#uicontrol invlerp toRaw(range=[0, 1], window=[-1, 2])\n"
+            f"void main() {{\n"
+            f"  emitRGBA(vec4(color * toRaw(getDataValue()), toRaw(getDataValue())));\n"
+            f"}}"
         )
-        return shader_builder.build_shader()
+        return {
+            "shader": shader,
+            "shaderControls": {"color": self.color},
+        }
 
     def generate_json(self) -> dict:
         return {

cryoet_data_portal_neuroglancer/state_generator.py

@@ -103,14 +103,17 @@ def generate_image_volume_layer(
     source: str,
     name: str = None,
     url: str = None,
+    color: str = "#FFFFFF",
     scale: tuple[float, float, float] = (1.0, 1.0, 1.0),
     is_visible: bool = True,
     rendering_depth: int = 1024,
 ) -> dict[str, Any]:
     source, name, url, _, scale = _setup_creation(source, name, url, scale=scale)
+    _validate_color(color)
     return ImageVolumeJSONGenerator(
         source=source,
         name=name,
+        color=color,
         scale=scale,
         is_visible=is_visible,
         rendering_depth=rendering_depth,