Move some *Copy*Info types out of wgpu_core::command::transfer

In the future `transfer` will want to use the `Arc` versions of these
types. I have exported them from `wgpu_core::command::ffi`, to document
that these are used for FFI purposes, and from `wgpu_core::command`, for
backwards compatibility, although I also change the in-tree uses to
use them from `wgpu_types` instead of from `wgpu_core::command`.

wgpu-core/src/command/encoder_command.rs

@@ -15,18 +15,18 @@ pub enum Command {
         size: Option<wgt::BufferAddress>,
     },
     CopyBufferToTexture {
-        src: crate::command::TexelCopyBufferInfo,
-        dst: crate::command::TexelCopyTextureInfo,
+        src: wgt::TexelCopyBufferInfo<id::BufferId>,
+        dst: wgt::TexelCopyTextureInfo<id::TextureId>,
         size: wgt::Extent3d,
     },
     CopyTextureToBuffer {
-        src: crate::command::TexelCopyTextureInfo,
-        dst: crate::command::TexelCopyBufferInfo,
+        src: wgt::TexelCopyTextureInfo<id::TextureId>,
+        dst: wgt::TexelCopyBufferInfo<id::BufferId>,
         size: wgt::Extent3d,
     },
     CopyTextureToTexture {
-        src: crate::command::TexelCopyTextureInfo,
-        dst: crate::command::TexelCopyTextureInfo,
+        src: wgt::TexelCopyTextureInfo<id::TextureId>,
+        dst: wgt::TexelCopyTextureInfo<id::TextureId>,
         size: wgt::Extent3d,
     },
     ClearBuffer {

wgpu-core/src/command/ffi.rs

@@ -0,0 +1,7 @@
+//! Types that are useful for FFI bindings to `wgpu`.
+
+use crate::id;
+
+pub type TexelCopyBufferInfo = wgt::TexelCopyBufferInfo<id::BufferId>;
+pub type TexelCopyTextureInfo = wgt::TexelCopyTextureInfo<id::TextureId>;
+pub type CopyExternalImageDestInfo = wgt::CopyExternalImageDestInfo<id::TextureId>;

wgpu-core/src/command/mod.rs

@@ -7,6 +7,7 @@ mod compute_command;
 mod draw;
 mod encoder;
 mod encoder_command;
+pub mod ffi;
 mod memory_init;
 mod pass;
 mod query;
@@ -58,6 +59,10 @@ use thiserror::Error;
 #[cfg(feature = "trace")]
 type TraceCommand = Command;
 
+pub type TexelCopyBufferInfo = ffi::TexelCopyBufferInfo;
+pub type TexelCopyTextureInfo = ffi::TexelCopyTextureInfo;
+pub type CopyExternalImageDestInfo = ffi::CopyExternalImageDestInfo;
+
 const PUSH_CONSTANT_CLEAR_ARRAY: &[u32] = &[0_u32; 64];
 
 /// The current state of a command or pass encoder.

wgpu-core/src/command/transfer.rs

@@ -15,7 +15,7 @@ use crate::{
     command::{clear_texture, CommandEncoderError, EncoderStateError},
     device::{Device, MissingDownlevelFlags},
     global::Global,
-    id::{BufferId, CommandEncoderId, TextureId},
+    id::{BufferId, CommandEncoderId},
     init_tracker::{
         has_copy_partial_init_tracker_coverage, MemoryInitKind, TextureInitRange,
         TextureInitTrackerAction,
@@ -29,9 +29,8 @@ use crate::{
 
 use super::{ClearError, CommandBufferMutable};
 
-pub type TexelCopyBufferInfo = wgt::TexelCopyBufferInfo<BufferId>;
-pub type TexelCopyTextureInfo = wgt::TexelCopyTextureInfo<TextureId>;
-pub type CopyExternalImageDestInfo = wgt::CopyExternalImageDestInfo<TextureId>;
+use super::TexelCopyBufferInfo;
+use super::TexelCopyTextureInfo;
 
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 pub enum CopySide {

wgpu-core/src/device/queue.rs

@@ -22,7 +22,7 @@ use crate::{
         extract_texture_selector, validate_linear_texture_data, validate_texture_buffer_copy,
         validate_texture_copy_dst_format, validate_texture_copy_range, ClearError,
         CommandAllocator, CommandBuffer, CommandEncoder, CommandEncoderError, CopySide,
-        TexelCopyTextureInfo, TransferError,
+        TransferError,
     },
     device::{DeviceError, WaitIdleError},
     get_lowest_common_denom,
@@ -1617,7 +1617,7 @@ impl Global {
     pub fn queue_write_texture(
         &self,
         queue_id: QueueId,
-        destination: &TexelCopyTextureInfo,
+        destination: &wgt::TexelCopyTextureInfo<id::TextureId>,
         data: &[u8],
         data_layout: &wgt::TexelCopyBufferLayout,
         size: &wgt::Extent3d,

wgpu-core/src/device/trace.rs

@@ -140,7 +140,7 @@ pub enum Action<'a> {
         queued: bool,
     },
     WriteTexture {
-        to: crate::command::TexelCopyTextureInfo,
+        to: wgt::TexelCopyTextureInfo<id::TextureId>,
         data: FileName,
         layout: wgt::TexelCopyBufferLayout,
         size: wgt::Extent3d,

wgpu/src/backend/wgpu_core.rs

@@ -386,8 +386,10 @@ impl ContextWgpuCore {
     }
 }
 
-fn map_buffer_copy_view(view: crate::TexelCopyBufferInfo<'_>) -> wgc::command::TexelCopyBufferInfo {
-    wgc::command::TexelCopyBufferInfo {
+fn map_buffer_copy_view(
+    view: crate::TexelCopyBufferInfo<'_>,
+) -> wgt::TexelCopyBufferInfo<wgc::id::BufferId> {
+    wgt::TexelCopyBufferInfo {
         buffer: view.buffer.inner.as_core().id,
         layout: view.layout,
     }
@@ -407,8 +409,8 @@ fn map_texture_copy_view(
 #[cfg_attr(not(webgl), expect(unused))]
 fn map_texture_tagged_copy_view(
     view: crate::CopyExternalImageDestInfo<&api::Texture>,
-) -> wgc::command::CopyExternalImageDestInfo {
-    wgc::command::CopyExternalImageDestInfo {
+) -> wgt::CopyExternalImageDestInfo<wgc::id::TextureId> {
+    wgt::CopyExternalImageDestInfo {
         texture: view.texture.inner.as_core().id,
         mip_level: view.mip_level,
         origin: view.origin,