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Always free staging buffers (#2961)
* Have `prepare_staging_buffer` take a raw hal Device. This helps the borrow checker understand that we can borrow `pending_writes`'s encoder and the raw Device at the same time. * Always free staging buffers. We must ensure that the staging buffer is not leaked when an error occurs, so allocate it as late as possible, and free it explicitly when those fallible operations we can't move it past go awry. Fixes #2959. * Some tests for texture and buffer copies. * Add CHANGELOG.md entry.
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@ -63,6 +63,7 @@ the same every time it is rendered, we now warn if it is missing.
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### Bug Fixes
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#### General
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- Free `StagingBuffers` even when an error occurs in the operation that consumes them. By @jimblandy in [#2961](https://github.com/gfx-rs/wgpu/pull/2961)
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- Improve the validation and error reporting of buffer mappings by @nical in [#2848](https://github.com/gfx-rs/wgpu/pull/2848)
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- Fix compilation errors when using wgpu-core in isolation while targetting `wasm32-unknown-unknown` by @Seamooo in [#2922](https://github.com/gfx-rs/wgpu/pull/2922)
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- Fixed opening of RenderDoc library by @abuffseagull in [#2930](https://github.com/gfx-rs/wgpu/pull/2930)
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@ -243,30 +243,28 @@ impl<A: hal::Api> PendingWrites<A> {
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}
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}
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impl<A: HalApi> super::Device<A> {
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fn prepare_staging_buffer(
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&mut self,
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size: wgt::BufferAddress,
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) -> Result<(StagingBuffer<A>, *mut u8), DeviceError> {
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profiling::scope!("prepare_staging_buffer");
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let stage_desc = hal::BufferDescriptor {
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label: Some("(wgpu internal) Staging"),
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size,
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usage: hal::BufferUses::MAP_WRITE | hal::BufferUses::COPY_SRC,
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memory_flags: hal::MemoryFlags::TRANSIENT,
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};
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fn prepare_staging_buffer<A: HalApi>(
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device: &mut A::Device,
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size: wgt::BufferAddress,
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) -> Result<(StagingBuffer<A>, *mut u8), DeviceError> {
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profiling::scope!("prepare_staging_buffer");
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let stage_desc = hal::BufferDescriptor {
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label: Some("(wgpu internal) Staging"),
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size,
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usage: hal::BufferUses::MAP_WRITE | hal::BufferUses::COPY_SRC,
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memory_flags: hal::MemoryFlags::TRANSIENT,
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};
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let buffer = unsafe { self.raw.create_buffer(&stage_desc)? };
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let mapping = unsafe { self.raw.map_buffer(&buffer, 0..size) }?;
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let buffer = unsafe { device.create_buffer(&stage_desc)? };
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let mapping = unsafe { device.map_buffer(&buffer, 0..size) }?;
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let staging_buffer = StagingBuffer {
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raw: buffer,
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size,
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is_coherent: mapping.is_coherent,
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};
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let staging_buffer = StagingBuffer {
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raw: buffer,
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size,
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is_coherent: mapping.is_coherent,
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};
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Ok((staging_buffer, mapping.ptr.as_ptr()))
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}
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Ok((staging_buffer, mapping.ptr.as_ptr()))
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}
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impl<A: hal::Api> StagingBuffer<A> {
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@ -350,21 +348,31 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
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return Ok(());
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}
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let (staging_buffer, staging_buffer_ptr) = device.prepare_staging_buffer(data_size)?;
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// Platform validation requires that the staging buffer always be
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// freed, even if an error occurs. All paths from here must call
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// `device.pending_writes.consume`.
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let (staging_buffer, staging_buffer_ptr) =
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prepare_staging_buffer(&mut device.raw, data_size)?;
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unsafe {
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if let Err(flush_error) = unsafe {
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profiling::scope!("copy");
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ptr::copy_nonoverlapping(data.as_ptr(), staging_buffer_ptr, data.len());
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staging_buffer.flush(&device.raw)?;
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};
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staging_buffer.flush(&device.raw)
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} {
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device.pending_writes.consume(staging_buffer);
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return Err(flush_error.into());
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}
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self.queue_write_staging_buffer_impl(
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let result = self.queue_write_staging_buffer_impl(
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device,
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device_token,
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staging_buffer,
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&staging_buffer,
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buffer_id,
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buffer_offset,
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)
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);
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device.pending_writes.consume(staging_buffer);
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result
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}
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pub fn queue_create_staging_buffer<A: HalApi>(
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@ -382,7 +390,7 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
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.map_err(|_| DeviceError::Invalid)?;
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let (staging_buffer, staging_buffer_ptr) =
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device.prepare_staging_buffer(buffer_size.get())?;
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prepare_staging_buffer(&mut device.raw, buffer_size.get())?;
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let fid = hub.staging_buffers.prepare(id_in);
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let id = fid.assign(staging_buffer, device_token);
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@ -413,15 +421,25 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
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.0
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.ok_or(TransferError::InvalidBuffer(buffer_id))?;
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unsafe { staging_buffer.flush(&device.raw)? };
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// At this point, we have taken ownership of the staging_buffer from the
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// user. Platform validation requires that the staging buffer always
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// be freed, even if an error occurs. All paths from here must call
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// `device.pending_writes.consume`.
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if let Err(flush_error) = unsafe { staging_buffer.flush(&device.raw) } {
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device.pending_writes.consume(staging_buffer);
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return Err(flush_error.into());
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}
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self.queue_write_staging_buffer_impl(
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let result = self.queue_write_staging_buffer_impl(
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device,
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device_token,
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staging_buffer,
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&staging_buffer,
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buffer_id,
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buffer_offset,
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)
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);
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device.pending_writes.consume(staging_buffer);
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result
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}
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pub fn queue_validate_write_buffer<A: HalApi>(
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@ -481,7 +499,7 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
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&self,
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device: &mut super::Device<A>,
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device_token: &mut Token<super::Device<A>>,
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staging_buffer: StagingBuffer<A>,
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staging_buffer: &StagingBuffer<A>,
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buffer_id: id::BufferId,
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buffer_offset: u64,
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) -> Result<(), QueueWriteError> {
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@ -520,7 +538,6 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
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encoder.copy_buffer_to_buffer(&staging_buffer.raw, dst_raw, region.into_iter());
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}
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device.pending_writes.consume(staging_buffer);
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device.pending_writes.dst_buffers.insert(buffer_id);
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// Ensure the overwritten bytes are marked as initialized so they don't need to be nulled prior to mapping or binding.
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@ -613,7 +630,6 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
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let block_rows_in_copy =
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(size.depth_or_array_layers - 1) * block_rows_per_image + height_blocks;
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let stage_size = stage_bytes_per_row as u64 * block_rows_in_copy as u64;
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let (staging_buffer, staging_buffer_ptr) = device.prepare_staging_buffer(stage_size)?;
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let dst = texture_guard.get_mut(destination.texture).unwrap();
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if !dst.desc.usage.contains(wgt::TextureUsages::COPY_DST) {
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@ -676,12 +692,23 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
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validate_texture_copy_range(destination, &dst.desc, CopySide::Destination, size)?;
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dst.life_guard.use_at(device.active_submission_index + 1);
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let dst_raw = dst
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.inner
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.as_raw()
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.ok_or(TransferError::InvalidTexture(destination.texture))?;
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let bytes_per_row = if let Some(bytes_per_row) = data_layout.bytes_per_row {
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bytes_per_row.get()
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} else {
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width_blocks * format_desc.block_size as u32
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};
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// Platform validation requires that the staging buffer always be
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// freed, even if an error occurs. All paths from here must call
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// `device.pending_writes.consume`.
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let (staging_buffer, staging_buffer_ptr) =
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prepare_staging_buffer(&mut device.raw, stage_size)?;
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if stage_bytes_per_row == bytes_per_row {
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profiling::scope!("copy aligned");
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// Fast path if the data is already being aligned optimally.
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@ -715,7 +742,10 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
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}
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}
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unsafe { staging_buffer.flush(&device.raw) }?;
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if let Err(e) = unsafe { staging_buffer.flush(&device.raw) } {
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device.pending_writes.consume(staging_buffer);
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return Err(e.into());
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}
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let regions = (0..array_layer_count).map(|rel_array_layer| {
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let mut texture_base = dst_base.clone();
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@ -737,11 +767,6 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
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usage: hal::BufferUses::MAP_WRITE..hal::BufferUses::COPY_SRC,
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};
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let dst_raw = dst
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.inner
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.as_raw()
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.ok_or(TransferError::InvalidTexture(destination.texture))?;
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unsafe {
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encoder
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.transition_textures(transition.map(|pending| pending.into_hal(dst)).into_iter());
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42
wgpu/tests/buffer_copy.rs
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42
wgpu/tests/buffer_copy.rs
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@ -0,0 +1,42 @@
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//! Tests for buffer copy validation.
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use wgt::BufferAddress;
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use crate::common::{initialize_test, TestParameters};
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#[test]
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fn copy_alignment() {
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fn try_copy(offset: BufferAddress, size: BufferAddress, should_panic: bool) {
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let mut parameters = TestParameters::default();
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if should_panic {
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parameters = parameters.failure();
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}
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initialize_test(parameters, |ctx| {
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let buffer = ctx.device.create_buffer(&BUFFER_DESCRIPTOR);
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let data = vec![255; size as usize];
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ctx.queue.write_buffer(&buffer, offset, &data);
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});
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}
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try_copy(0, 0, false);
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try_copy(4, 16 + 1, true);
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try_copy(64, 20 + 2, true);
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try_copy(256, 44 + 3, true);
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try_copy(1024, 8 + 4, false);
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try_copy(0, 4, false);
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try_copy(4 + 1, 8, true);
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try_copy(64 + 2, 12, true);
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try_copy(256 + 3, 16, true);
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try_copy(1024 + 4, 4, false);
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}
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const BUFFER_SIZE: BufferAddress = 1234;
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const BUFFER_DESCRIPTOR: wgpu::BufferDescriptor = wgpu::BufferDescriptor {
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label: None,
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size: BUFFER_SIZE,
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usage: wgpu::BufferUsages::COPY_SRC.union(wgpu::BufferUsages::COPY_DST),
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mapped_at_creation: false,
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};
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@ -1,6 +1,7 @@
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// All files containing tests
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mod common;
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mod buffer_copy;
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mod clear_texture;
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mod device;
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mod example_wgsl;
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@ -8,5 +9,6 @@ mod instance;
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mod poll;
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mod resource_descriptor_accessor;
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mod shader_primitive_index;
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mod texture_bounds;
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mod vertex_indices;
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mod zero_init_texture_after_discard;
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61
wgpu/tests/texture_bounds.rs
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61
wgpu/tests/texture_bounds.rs
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@ -0,0 +1,61 @@
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//! Tests for texture copy bounds checks.
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use crate::common::{initialize_test, TestParameters};
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use std::num::NonZeroU32;
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#[test]
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fn bad_copy_origin() {
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fn try_origin(origin: wgpu::Origin3d, should_panic: bool) {
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let mut parameters = TestParameters::default();
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if should_panic {
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parameters = parameters.failure();
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}
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initialize_test(parameters, |ctx| {
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let texture = ctx.device.create_texture(&TEXTURE_DESCRIPTOR);
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let data = vec![255; BUFFER_SIZE as usize];
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ctx.queue.write_texture(
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wgpu::ImageCopyTexture {
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texture: &texture,
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mip_level: 0,
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origin,
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aspect: wgpu::TextureAspect::All,
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},
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&data,
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BUFFER_COPY_LAYOUT,
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TEXTURE_SIZE,
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);
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});
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}
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try_origin(wgpu::Origin3d { x: 0, y: 0, z: 0 }, false);
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try_origin(wgpu::Origin3d { x: 1, y: 0, z: 0 }, true);
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try_origin(wgpu::Origin3d { x: 0, y: 1, z: 0 }, true);
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try_origin(wgpu::Origin3d { x: 0, y: 0, z: 1 }, true);
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}
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const TEXTURE_SIZE: wgpu::Extent3d = wgpu::Extent3d {
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width: 64,
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height: 64,
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depth_or_array_layers: 1,
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};
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const TEXTURE_DESCRIPTOR: wgpu::TextureDescriptor = wgpu::TextureDescriptor {
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label: Some("CopyOrigin"),
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size: TEXTURE_SIZE,
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mip_level_count: 1,
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sample_count: 1,
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dimension: wgpu::TextureDimension::D2,
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format: wgpu::TextureFormat::Rgba8UnormSrgb,
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usage: wgpu::TextureUsages::COPY_DST.union(wgpu::TextureUsages::COPY_SRC),
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};
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const BYTES_PER_PIXEL: u32 = 4;
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const BUFFER_SIZE: u32 = TEXTURE_SIZE.width * TEXTURE_SIZE.height * BYTES_PER_PIXEL;
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const BUFFER_COPY_LAYOUT: wgpu::ImageDataLayout = wgpu::ImageDataLayout {
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offset: 0,
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bytes_per_row: NonZeroU32::new(TEXTURE_SIZE.width * BYTES_PER_PIXEL),
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rows_per_image: None,
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};
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