0c583af06d
Bug: skia:7901 Change-Id: I46fec08711b8b483cf58ccae733e4dc2a9689231 Reviewed-on: https://skia-review.googlesource.com/c/162280 Commit-Queue: Jim Van Verth <jvanverth@google.com> Reviewed-by: Brian Salomon <bsalomon@google.com>
74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
/*
|
|
* Copyright 2016 Google Inc.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
#ifndef SkYUVSizeInfo_DEFINED
|
|
#define SkYUVSizeInfo_DEFINED
|
|
|
|
#include "SkImageInfo.h"
|
|
#include "SkSize.h"
|
|
#include "SkYUVAIndex.h"
|
|
|
|
struct SkYUVSizeInfo {
|
|
static constexpr auto kMaxCount = 4;
|
|
|
|
SkColorType fColorTypes[kMaxCount];
|
|
SkISize fSizes[kMaxCount];
|
|
|
|
/**
|
|
* While the widths of the Y, U, V and A planes are not restricted, the
|
|
* implementation often requires that the width of the memory allocated
|
|
* for each plane be a multiple of 8.
|
|
*
|
|
* This struct allows us to inform the client how many "widthBytes"
|
|
* that we need. Note that we use the new idea of "widthBytes"
|
|
* because this idea is distinct from "rowBytes" (used elsewhere in
|
|
* Skia). "rowBytes" allow the last row of the allocation to not
|
|
* include any extra padding, while, in this case, every single row of
|
|
* the allocation must be at least "widthBytes".
|
|
*/
|
|
size_t fWidthBytes[kMaxCount];
|
|
|
|
bool operator==(const SkYUVSizeInfo& that) const {
|
|
for (int i = 0; i < kMaxCount; ++i) {
|
|
if (fColorTypes[i] != that.fColorTypes[i]) {
|
|
return false;
|
|
}
|
|
|
|
if (kUnknown_SkColorType == fColorTypes[i]) {
|
|
SkASSERT(!fSizes[i].fWidth && !fSizes[i].fHeight && !fWidthBytes[i]);
|
|
SkASSERT(!that.fSizes[i].fWidth && !that.fSizes[i].fHeight && !that.fWidthBytes[i]);
|
|
continue;
|
|
}
|
|
|
|
SkASSERT(fSizes[i].fWidth && fSizes[i].fHeight && fWidthBytes[i]);
|
|
if (fSizes[i] != that.fSizes[i] || fWidthBytes[i] != that.fWidthBytes[i]) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
size_t computeTotalBytes() const {
|
|
size_t totalBytes = 0;
|
|
|
|
for (int i = 0; i < kMaxCount; ++i) {
|
|
SkASSERT(kUnknown_SkColorType != fColorTypes[i] ||
|
|
(!fSizes[i].fWidth && !fSizes[i].fHeight && !fWidthBytes[i]));
|
|
|
|
totalBytes += fWidthBytes[i] * fSizes[i].height();
|
|
}
|
|
|
|
return totalBytes;
|
|
}
|
|
|
|
void computePlanes(void* base, void* planes[kMaxCount]) const;
|
|
|
|
};
|
|
|
|
#endif // SkYUVSizeInfo_DEFINED
|