1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
/*
* Copyright (c) 2021-2024 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import WebGPU_Internal
extension WebGPU.Buffer {
func copy(from data: Span<UInt8>, offset: Int) {
// FIXME: Use a bounds-checking implementation when one is available.
var bufferContents = unsafe MutableSpan<UInt8>(_unsafeCxxSpan: getBufferContents());
precondition(bufferContents.count >= offset + data.count)
for i in 0..<data.count {
bufferContents[offset + i] = data[i]
}
}
}
// FIXME(emw): Find a way to generate thunks like these, maybe via a macro?
@_expose(Cxx)
public func Buffer_copyFrom_thunk(_ buffer: WebGPU.Buffer, from data: SpanConstUInt8, offset: Int) {
buffer.copy(from: unsafe Span<UInt8>(_unsafeCxxSpan: data), offset: offset)
}
@_expose(Cxx)
public func Buffer_getMappedRange_thunk(_ buffer: WebGPU.Buffer, offset: Int, size: Int) -> SpanUInt8 {
return buffer.getMappedRange(offset: offset, size: size)
}
internal func computeRangeSize(size: Int, offset: Int) -> Int
{
let result = WebGPU_Internal.checkedDifferenceSizeT(size, offset)
if result.hasOverflowed() {
return 0
}
return result.value()
}
extension WebGPU.Buffer {
public func getMappedRange(offset: Int, size: Int) -> SpanUInt8
{
if !isValid() {
return unsafe SpanUInt8()
}
var rangeSize = size
if size == WGPU_WHOLE_MAP_SIZE {
rangeSize = computeRangeSize(size: Int(currentSize()), offset: offset)
}
if !validateGetMappedRange(offset, rangeSize) {
return unsafe SpanUInt8()
}
m_mappedRanges.add(WTFRangeSizeT(UInt(offset), UInt(offset + rangeSize)))
m_mappedRanges.compact()
if m_buffer.storageMode == .private || m_buffer.storageMode == .memoryless || m_buffer.length == 0 {
return unsafe SpanUInt8()
}
return unsafe getBufferContents().subspan(offset, rangeSize)
}
}
|
