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Merge pull request #1814 from kocsis1david/write-texture-data-offset

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write_texture data offset
This commit is contained in:
Connor Fitzgerald 2021-08-18 02:29:15 -04:00 committed by GitHub
commit 80ec65e892
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1 changed files with 10 additions and 4 deletions
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14
wgpu-core/src/device/queue.rs
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@ -445,8 +445,12 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
unsafe {
profiling::scope!("copy");
if stage_bytes_per_row == bytes_per_row {
// Fast path if the data isalready being aligned optimally.
ptr::copy_nonoverlapping(data.as_ptr(), mapping.ptr.as_ptr(), stage_size as usize);
// Fast path if the data is already being aligned optimally.
ptr::copy_nonoverlapping(
data.as_ptr().offset(data_layout.offset as isize),
mapping.ptr.as_ptr(),
stage_size as usize,
);
} else {
// Copy row by row into the optimal alignment.
let copy_bytes_per_row = stage_bytes_per_row.min(bytes_per_row) as usize;
@ -454,8 +458,10 @@ impl<G: GlobalIdentityHandlerFactory> Global<G> {
let rows_offset = layer * block_rows_per_image;
for row in 0..height_blocks {
ptr::copy_nonoverlapping(
data.as_ptr()
.offset((rows_offset + row) as isize * bytes_per_row as isize),
data.as_ptr().offset(
data_layout.offset as isize
+ (rows_offset + row) as isize * bytes_per_row as isize,
),
mapping.ptr.as_ptr().offset(
(rows_offset + row) as isize * stage_bytes_per_row as isize,
),