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tvg: support dash offset property

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properly store/restore the dash offset property
from the tvg loader and saver

Issue: https://github.com/thorvg/thorvg/issues/1617
This commit is contained in:
Hermet Park 2023-09-26 11:08:12 +09:00 • committed by Hermet Park
parent c7123a1547
commit ed23b432bb
3 changed files with 15 additions and 1 deletions
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7
src/loaders/tvg/tvgTvgBinInterpreter.cpp
View file

@ -322,6 +322,13 @@ static bool _parseShapeStroke(const char *ptr, const char *end, Shape *shape)
shape->strokeMiterlimit(miterlimit);
break;
}
case TVG_TAG_SHAPE_STROKE_DASH_OFFSET: {
if (block.length != SIZE(float)) return false;
float offset;
READ_FLOAT(&offset, block.data);
P(shape)->rs.stroke->dashOffset = offset;
break;
}
default: {
TVGLOG("TVG", "Unsupported tag %d (0x%x) used as one of stroke properties, %d bytes skipped", block.type, block.type, block.length);
break;

1
src/renderer/tvgBinaryDesc.h
View file

@ -82,6 +82,7 @@ using TvgBinFlag = TvgBinByte;
#define TVG_TAG_SHAPE_STROKE_DASHPTRN (TvgBinTag)0x55
#define TVG_TAG_SHAPE_STROKE_MITERLIMIT (TvgBinTag)0x56
#define TVG_TAG_SHAPE_STROKE_ORDER (TvgBinTag)0x57
#define TVG_TAG_SHAPE_STROKE_DASH_OFFSET (TvgBinTag)0x58
//Fill

8
src/savers/tvg/tvgTvgSaver.cpp
View file

@ -469,7 +469,8 @@ TvgBinCounter TvgSaver::serializeStroke(const Shape* shape, const Matrix* pTrans
//dash
const float* dashPattern = nullptr;
auto dashCnt = shape->strokeDash(&dashPattern);
float offset = 0.0f;
auto dashCnt = P(shape)->rs.strokeDash(&dashPattern, &offset);
if (dashPattern && dashCnt > 0) {
TvgBinCounter dashCntSize = SIZE(dashCnt);
TvgBinCounter dashPtrnSize = dashCnt * SIZE(dashPattern[0]);
@ -487,6 +488,11 @@ TvgBinCounter TvgSaver::serializeStroke(const Shape* shape, const Matrix* pTrans
cnt += writeTagProperty(TVG_TAG_SHAPE_STROKE_MITERLIMIT, SIZE(miterlimit), &miterlimit);
}
//dash offset
if (!mathZero(offset)) {
cnt += writeTagProperty(TVG_TAG_SHAPE_STROKE_DASH_OFFSET, SIZE(offset), &offset);
}
writeReservedCount(cnt);
return SERIAL_DONE(cnt);