wgpu: Instead of asking for large resolution limits, use the reported…

… available limits.

This is a reasonable choice for us because our texture usage is all
either dynamic (block textures) or window-size-dependent; we have no
fixed sizes.

This makes All is Cubes compatible with (at least my own) phone browser
which it had not been before (because the 2D texture size limit was
4096, but `Limits::default()` contains 8192).

all-is-cubes-gpu/src/in_wgpu.rs

@@ -85,7 +85,10 @@ impl<I: time::Instant> SurfaceRenderer<I> {
         adapter: &wgpu::Adapter,
     ) -> Result<Self, GraphicsResourceError> {
         let (device, queue) = adapter
-            .request_device(&EverythingRenderer::<I>::device_descriptor(), None)
+            .request_device(
+                &EverythingRenderer::<I>::device_descriptor(adapter.limits()),
+                None,
+            )
             .await
             .map_err(|e| {
                 GraphicsResourceError::new(
@@ -232,13 +235,12 @@ pub struct EverythingRenderer<I> {
 
 impl<I: time::Instant> EverythingRenderer<I> {
     /// A device descriptor suitable for the expectations of [`EverythingRenderer`].
-    pub fn device_descriptor() -> wgpu::DeviceDescriptor<'static> {
+    pub fn device_descriptor(available_limits: wgpu::Limits) -> wgpu::DeviceDescriptor<'static> {
         wgpu::DeviceDescriptor {
             features: wgpu::Features::empty(),
             limits: wgpu::Limits {
                 max_inter_stage_shader_components: 32, // number used by blocks-and-lines shader
-                ..wgpu::Limits::downlevel_webgl2_defaults()
-                    .using_resolution(wgpu::Limits::default())
+                ..wgpu::Limits::downlevel_webgl2_defaults().using_resolution(available_limits)
             },
             label: None,
         }

all-is-cubes-gpu/src/in_wgpu/headless.rs

@@ -26,7 +26,7 @@ impl Builder {
     ) -> Result<Self, wgpu::RequestDeviceError> {
         let (device, queue) = adapter
             .request_device(
-                &in_wgpu::EverythingRenderer::<AdaptedInstant>::device_descriptor(),
+                &in_wgpu::EverythingRenderer::<AdaptedInstant>::device_descriptor(adapter.limits()),
                 None,
             )
             .await?;

all-is-cubes-gpu/src/in_wgpu/shader_testing.rs

@@ -41,7 +41,7 @@ where
 {
     let (device, queue) = adapter
         .request_device(
-            &in_wgpu::EverythingRenderer::<time::NoTime>::device_descriptor(),
+            &in_wgpu::EverythingRenderer::<time::NoTime>::device_descriptor(adapter.limits()),
             None,
         )
         .await