Add inital debug labels

- bind group
- bind group layout
- command encoder
- texture

examples/compute/main.c

@@ -69,6 +69,7 @@ int main(
 
     WGPUBufferId buffer = wgpu_device_create_buffer_mapped(device,
             &(WGPUBufferDescriptor){
+                .label = "buffer",
                 .size = size,
 				.usage = WGPUBufferUsage_STORAGE | WGPUBufferUsage_MAP_READ},
             &staging_memory);
@@ -80,6 +81,7 @@ int main(
     WGPUBindGroupLayoutId bind_group_layout =
         wgpu_device_create_bind_group_layout(device,
             &(WGPUBindGroupLayoutDescriptor){
+                .label = "bind group layout",
                 .entries = &(WGPUBindGroupLayoutEntry){
 					.binding = 0,
                     .visibility = WGPUShaderStage_COMPUTE,
@@ -94,7 +96,9 @@ int main(
 			.offset = 0}}};
 
     WGPUBindGroupId bind_group = wgpu_device_create_bind_group(device,
-            &(WGPUBindGroupDescriptor){.layout = bind_group_layout,
+            &(WGPUBindGroupDescriptor){
+                .label = "bind group",
+                .layout = bind_group_layout,
                 .entries = &(WGPUBindGroupEntry){
 					.binding = 0,
 					.resource = resource},
@@ -124,7 +128,7 @@ int main(
 
     WGPUCommandEncoderId encoder = wgpu_device_create_command_encoder(
         device, &(WGPUCommandEncoderDescriptor){
-            .todo = 0
+            .label = "command encoder",
         });
 
     WGPUComputePassId command_pass =

examples/triangle/main.c

@@ -79,12 +79,14 @@ int main() {
     WGPUBindGroupLayoutId bind_group_layout =
         wgpu_device_create_bind_group_layout(device,
             &(WGPUBindGroupLayoutDescriptor){
+                .label = "bind group layout",
                 .entries = NULL,
                 .entries_length = 0,
             });
     WGPUBindGroupId bind_group =
         wgpu_device_create_bind_group(device,
             &(WGPUBindGroupDescriptor){
+                .label = "bind group",
                 .layout = bind_group_layout,
                 .entries = NULL,
                 .entries_length = 0,
@@ -237,7 +239,7 @@ int main() {
         }
 
         WGPUCommandEncoderId cmd_encoder = wgpu_device_create_command_encoder(
-            device, &(WGPUCommandEncoderDescriptor){.todo = 0});
+            device, &(WGPUCommandEncoderDescriptor){.label = "command encoder"});
 
         WGPURenderPassColorAttachmentDescriptor
             color_attachments[ATTACHMENTS_LENGTH] = {

ffi/wgpu.h

@@ -470,6 +470,7 @@ typedef struct {
 } WGPUBindGroupEntry;
 
 typedef struct {
+  const char *label;
   WGPUBindGroupLayoutId layout;
   const WGPUBindGroupEntry *entries;
   uintptr_t entries_length;
@@ -493,6 +494,7 @@ typedef struct {
 } WGPUBindGroupLayoutEntry;
 
 typedef struct {
+  const char *label;
   const WGPUBindGroupLayoutEntry *entries;
   uintptr_t entries_length;
 } WGPUBindGroupLayoutDescriptor;
@@ -511,12 +513,13 @@ typedef uint32_t WGPUBufferUsage;
 #define WGPUBufferUsage_NONE 0
 
 typedef struct {
+  const char *label;
   WGPUBufferAddress size;
   WGPUBufferUsage usage;
 } WGPUBufferDescriptor;
 
 typedef struct {
-  uint32_t todo;
+  const char *label;
 } WGPUCommandEncoderDescriptor;
 
 typedef uint64_t WGPUId_PipelineLayout_Dummy;
@@ -671,6 +674,7 @@ typedef struct {
 } WGPUSwapChainDescriptor;
 
 typedef struct {
+  const char *label;
   WGPUExtent3d size;
   uint32_t array_layer_count;
   uint32_t mip_level_count;

wgpu-core/src/binding_model.rs

@@ -59,6 +59,7 @@ pub struct BindGroupLayoutEntry {
 #[repr(C)]
 #[derive(Debug)]
 pub struct BindGroupLayoutDescriptor {
+    pub label: *const std::os::raw::c_char,
     pub entries: *const BindGroupLayoutEntry,
     pub entries_length: usize,
 }
@@ -113,6 +114,7 @@ pub struct BindGroupEntry {
 #[repr(C)]
 #[derive(Debug)]
 pub struct BindGroupDescriptor {
+    pub label: *const std::os::raw::c_char,
     pub layout: BindGroupLayoutId,
     pub entries: *const BindGroupEntry,
     pub entries_length: usize,

wgpu-core/src/device/mod.rs

@@ -321,8 +321,11 @@ impl<B: GfxBackend> Device<B> {
         };
 
         let mut buffer = unsafe { self.raw.create_buffer(desc.size, usage).unwrap() };
-        if let Some(label) = desc.label {
-            unsafe { self.raw.set_buffer_name(&mut buffer, label) };
+        if !desc.label.is_null() {
+            unsafe {
+                let label = ffi::CStr::from_ptr(desc.label).to_string_lossy();
+                self.raw.set_buffer_name(&mut buffer, &label)
+            };
         }
         let requirements = unsafe { self.raw.get_buffer_requirements(&buffer) };
         let memory = self
@@ -398,16 +401,20 @@ impl<B: GfxBackend> Device<B> {
         // TODO: 2D arrays, cubemap arrays
 
         let mut image = unsafe {
-            self.raw.create_image(
+            let mut image = self.raw.create_image(
                 kind,
                 desc.mip_level_count as hal::image::Level,
                 format,
                 hal::image::Tiling::Optimal,
                 usage,
                 view_capabilities,
-            )
-        }
-        .unwrap();
+            ).unwrap();
+            if !desc.label.is_null() {
+                let label = ffi::CStr::from_ptr(desc.label).to_string_lossy();
+                self.raw.set_image_name(&mut image, &label);
+            }
+            image
+        };
         let requirements = unsafe { self.raw.get_image_requirements(&image) };
 
         let memory = self
@@ -913,10 +920,16 @@ impl<F: IdentityFilter<id::BindGroupLayoutId>> Global<F> {
 
         let raw = unsafe {
             let (device_guard, _) = hub.devices.read(&mut token);
-            device_guard[device_id]
+            let device = &device_guard[device_id];
+            let mut raw_layout = device
                 .raw
                 .create_descriptor_set_layout(&raw_bindings, &[])
-                .unwrap()
+                .unwrap();
+            if !desc.label.is_null() {
+                let label = ffi::CStr::from_ptr(desc.label).to_string_lossy();
+                device.raw.set_descriptor_set_layout_name(&mut raw_layout, &label);
+            }
+            raw_layout
         };
 
         let layout = binding_model::BindGroupLayout {
@@ -1005,7 +1018,7 @@ impl<F: IdentityFilter<id::BindGroupId>> Global<F> {
             unsafe { slice::from_raw_parts(desc.entries, desc.entries_length as usize) };
         assert_eq!(entries.len(), bind_group_layout.entries.len());
 
-        let desc_set = unsafe {
+        let mut desc_set = unsafe {
             let mut desc_sets = ArrayVec::<[_; 1]>::new();
             device
                 .desc_allocator
@@ -1021,6 +1034,13 @@ impl<F: IdentityFilter<id::BindGroupId>> Global<F> {
             desc_sets.pop().unwrap()
         };
 
+        if !desc.label.is_null() {
+            unsafe {
+                let label = ffi::CStr::from_ptr(desc.label).to_string_lossy();
+                device.raw.set_descriptor_set_name(desc_set.raw_mut(), &label);
+            }
+        }
+
         // fill out the descriptors
         let mut used = TrackerSet::new(B::VARIANT);
         {
@@ -1238,7 +1258,7 @@ impl<F: IdentityFilter<id::CommandEncoderId>> Global<F> {
     pub fn device_create_command_encoder<B: GfxBackend>(
         &self,
         device_id: id::DeviceId,
-        _desc: &wgt::CommandEncoderDescriptor,
+        desc: &wgt::CommandEncoderDescriptor,
         id_in: F::Input,
     ) -> id::CommandEncoderId {
         let hub = B::hub(self);
@@ -1256,17 +1276,22 @@ impl<F: IdentityFilter<id::CommandEncoderId>> Global<F> {
             .lock_life(&mut token)
             .lowest_active_submission();
 
-        let mut comb = device
+        let mut command_buffer = device
             .com_allocator
             .allocate(dev_stored, &device.raw, device.features, lowest_active_index);
         unsafe {
-            comb.raw.last_mut().unwrap().begin_primary(
+            let raw_command_buffer = command_buffer.raw.last_mut().unwrap();
+            if !desc.label.is_null() {
+                let label = ffi::CStr::from_ptr(desc.label).to_string_lossy();
+                device.raw.set_command_buffer_name(raw_command_buffer, &label);
+            }
+            raw_command_buffer.begin_primary(
                 hal::command::CommandBufferFlags::ONE_TIME_SUBMIT,
             );
         }
 
         hub.command_buffers
-            .register_identity(id_in, comb, &mut token)
+            .register_identity(id_in, command_buffer, &mut token)
     }
 
     pub fn command_encoder_destroy<B: GfxBackend>(

wgpu-types/src/lib.rs

@@ -536,20 +536,26 @@ bitflags::bitflags! {
 }
 
 #[repr(C)]
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 #[derive(Clone, Debug)]
-pub struct BufferDescriptor<'a> {
-    pub label: Option<&'a str>,
+pub struct BufferDescriptor {
+    pub label: *const std::os::raw::c_char,
     pub size: BufferAddress,
     pub usage: BufferUsage,
 }
 
 #[repr(C)]
-#[derive(Clone, Debug, Default)]
+#[derive(Clone, Debug)]
 pub struct CommandEncoderDescriptor {
     // MSVC doesn't allow zero-sized structs
     // We can remove this when we actually have a field
-    pub todo: u32,
+    // pub todo: u32,
+    pub label: *const std::os::raw::c_char,
+}
+
+impl Default for CommandEncoderDescriptor {
+    fn default() -> CommandEncoderDescriptor {
+        unsafe { std::mem::zeroed() }
+    }
 }
 
 pub type DynamicOffset = u32;
@@ -734,6 +740,7 @@ pub struct Extent3d {
 #[repr(C)]
 #[derive(Clone, Debug, PartialEq)]
 pub struct TextureDescriptor {
+    pub label: *const std::os::raw::c_char,
     pub size: Extent3d,
     pub array_layer_count: u32,
     pub mip_level_count: u32,