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sw_engine: optimize rle clipping

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We don't need to copy the rle data unecessarily,
we can just replace the completed clip rle.
This commit is contained in:
Hermet Park 2021-03-16 10:23:11 +09:00 • committed by GitHub
parent 0faea8a9ab
commit 105a59b5b3
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 13 additions and 34 deletions
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47
src/lib/sw_engine/tvgSwRle.cpp
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@ -772,6 +772,15 @@ SwSpan* _intersectSpansRect(const SwBBox *bbox, const SwRleData *targetRle, SwSp
return out;
}
void _replaceClipSpan(SwRleData *rle, SwSpan* clippedSpans, uint32_t size)
{
free(rle->spans);
rle->spans = clippedSpans;
rle->size = rle->alloc = size;
}
/************************************************************************/
/* External Class Implementation */
/************************************************************************/
@ -915,28 +924,6 @@ void rleFree(SwRleData* rle)
free(rle);
}
void updateRleSpans(SwRleData *rle, const SwSpan* curSpans, uint32_t size)
{
if (size == 0) {
rle->size = 0;
return;
}
if (!rle->spans || !curSpans) return;
rle->alloc = size * 2;
rle->spans = static_cast<SwSpan*>(realloc(rle->spans, rle->alloc * sizeof(SwSpan)));
rle->size = size;
if (!rle->spans) return;
for (int i = 0; i < (int)rle->size ; i++)
{
rle->spans[i].x = curSpans[i].x;
rle->spans[i].y = curSpans[i].y;
rle->spans[i].len = curSpans[i].len;
rle->spans[i].coverage = curSpans[i].coverage;
}
}
void rleClipPath(SwRleData *rle, const SwRleData *clip)
{
@ -946,16 +933,14 @@ void rleClipPath(SwRleData *rle, const SwRleData *clip)
if (!spans) return;
auto spansEnd = _intersectSpansRegion(clip, rle, spans, spanCnt);
//Update Spans
updateRleSpans(rle, spans, spansEnd - spans);
if (spans) free(spans);
_replaceClipSpan(rle, spans, spansEnd - spans);
#ifdef THORVG_LOG_ENABLED
cout << "SW_ENGINE: Using ClipPath!" << endl;
#endif
}
void rleClipRect(SwRleData *rle, const SwBBox* clip)
{
if (rle->size == 0) return;
@ -963,10 +948,7 @@ void rleClipRect(SwRleData *rle, const SwBBox* clip)
if (!spans) return;
auto spansEnd = _intersectSpansRect(clip, rle, spans, rle->size);
//Update Spans
updateRleSpans(rle, spans, spansEnd - spans);
if (spans) free(spans);
_replaceClipSpan(rle, spans, spansEnd - spans);
#ifdef THORVG_LOG_ENABLED
cout <<"SW_ENGINE: Using ClipRect!" << endl;
@ -984,9 +966,6 @@ void rleAlphaMask(SwRleData *rle, const SwRleData *clip)
if (!spans) return;
auto spansEnd = _intersectMaskRegion(clip, rle, spans, spanCnt);
//Update Spans
updateRleSpans(rle, spans, spansEnd - spans);
if (spans) free(spans);
_replaceClipSpan(rle, spans, spansEnd - spans);
}