Improve HDR support (#75)

Author: almarklein

rendercanvas/offscreen.py

@@ -36,7 +36,7 @@ def _rc_gui_poll(self):
     def _rc_get_present_methods(self):
         return {
             "bitmap": {
-                "formats": ["rgba-u8"],
+                "formats": ["rgba-u8", "rgba-f16", "rgba-f32", "rgba-u16"],
             }
         }
 

rendercanvas/utils/cube.py

@@ -12,7 +12,9 @@
 # %% Entrypoints (sync and async)
 
 
-def setup_drawing_sync(canvas, power_preference="high-performance", limits=None):
+def setup_drawing_sync(
+    canvas, power_preference="high-performance", limits=None, format=None
+):
     """Setup to draw a rotating cube on the given canvas.
 
     The given canvas must implement WgpuCanvasInterface, but nothing more.
@@ -23,7 +25,9 @@ def setup_drawing_sync(canvas, power_preference="high-performance", limits=None)
     device = adapter.request_device_sync(required_limits=limits)
 
     pipeline_layout, uniform_buffer, bind_groups = create_pipeline_layout(device)
-    pipeline_kwargs = get_render_pipeline_kwargs(canvas, device, pipeline_layout)
+    pipeline_kwargs = get_render_pipeline_kwargs(
+        canvas, device, pipeline_layout, format
+    )
 
     render_pipeline = device.create_render_pipeline(**pipeline_kwargs)
 
@@ -32,7 +36,7 @@ def setup_drawing_sync(canvas, power_preference="high-performance", limits=None)
     )
 
 
-async def setup_drawing_async(canvas, limits=None):
+async def setup_drawing_async(canvas, limits=None, format=None):
     """Setup to async-draw a rotating cube on the given canvas.
 
     The given canvas must implement WgpuCanvasInterface, but nothing more.
@@ -43,7 +47,9 @@ async def setup_drawing_async(canvas, limits=None):
     device = await adapter.request_device_async(required_limits=limits)
 
     pipeline_layout, uniform_buffer, bind_groups = create_pipeline_layout(device)
-    pipeline_kwargs = get_render_pipeline_kwargs(canvas, device, pipeline_layout)
+    pipeline_kwargs = get_render_pipeline_kwargs(
+        canvas, device, pipeline_layout, format
+    )
 
     render_pipeline = await device.create_render_pipeline_async(**pipeline_kwargs)
 
@@ -55,9 +61,10 @@ async def setup_drawing_async(canvas, limits=None):
 # %% Functions to create wgpu objects
 
 
-def get_render_pipeline_kwargs(canvas, device, pipeline_layout):
+def get_render_pipeline_kwargs(canvas, device, pipeline_layout, render_texture_format):
     context = canvas.get_context("wgpu")
-    render_texture_format = context.get_preferred_format(device.adapter)
+    if render_texture_format is None:
+        render_texture_format = context.get_preferred_format(device.adapter)
     context.configure(device=device, format=render_texture_format)
 
     shader = device.create_shader_module(code=shader_source)