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wg_engine: fix strokes failers and visual atrifacts

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Ignoring rezo-width strokes, single point strokes.
Fix visual artifacts in case of mitter joints.
This commit is contained in:
Sergii Liebodkin 2024-06-13 16:51:27 +03:00 • committed by Hermet Park
parent 43464ceba4
commit 419fa93989
2 changed files with 18 additions and 30 deletions
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23
src/renderer/wg_engine/tvgWgGeometry.cpp
View file

@ -310,11 +310,9 @@ void WgGeometryData::appendStrokeDashed(const WgPolyline* polyline, const Render
assert(polyline);
static WgPolyline dashed;
dashed.clear();
// append single point polyline
if (polyline->pts.count == 1)
appendStroke(polyline, stroke);
// ignore singpe points polyline
// append multy points dashed polyline
else if (polyline->pts.count >= 2) {
if (polyline->pts.count >= 2) {
auto& pts = polyline->pts;
auto& dist = polyline->dist;
// starting state
@ -357,21 +355,6 @@ void WgGeometryData::appendStroke(const WgPolyline* polyline, const RenderStroke
assert(stroke);
assert(polyline);
float wdt = stroke->width / 2;
// single point sub-path
if (polyline->pts.count == 1) {
if (stroke->cap == StrokeCap::Round) {
appendCircle(polyline->pts[0], wdt);
} else if (stroke->cap == StrokeCap::Butt) {
// for zero length sub-paths no stroke is rendered
} else if (stroke->cap == StrokeCap::Square) {
appendRect(
polyline->pts[0] + WgPoint(+wdt, +wdt),
polyline->pts[0] + WgPoint(+wdt, -wdt),
polyline->pts[0] + WgPoint(-wdt, +wdt),
polyline->pts[0] + WgPoint(-wdt, -wdt)
);
}
} else
// single line sub-path
if (polyline->pts.count == 2) {
@ -474,7 +457,7 @@ void WgGeometryData::appendStroke(const WgPolyline* polyline, const RenderStroke
} else if (stroke->join == StrokeJoin::Miter) {
WgPoint nrm = (nrm0 + nrm1).normal();
float cosine = nrm.dot(nrm0);
if ((cosine != 0.0f) && (abs(cosine) != 1.0f) && (abs(wdt / cosine) <= stroke->miterlimit * 2)) {
if ((cosine != 0.0f) && (abs(cosine) < 1.0f) && (abs(wdt / cosine) <= stroke->miterlimit * 2)) {
appendRect(v1 + nrm * (wdt / cosine), v1 + offset0, v1 + offset1, v1);
appendRect(v1 - nrm * (wdt / cosine), v1 - offset0, v1 - offset1, v1);
} else {

15
src/renderer/wg_engine/tvgWgRenderData.cpp
View file

@ -321,16 +321,19 @@ void WgRenderDataShape::updateMeshes(WgContext& context, const WgPolyline* polyl
updateBBox(pmin, pmax);
}
// generate strokes geometry
if ((polyline->pts.count >= 1) && rstroke) {
if ((polyline->pts.count >= 1) && rstroke && (rstroke->width > 0.0f)) {
static WgGeometryData geometryData; geometryData.clear();
static WgPolyline trimmed;
// trim -> split -> stroke
if ((rstroke->dashPattern) && ((rstroke->trim.begin != 0.0f) || (rstroke->trim.end != 1.0f))) {
polyline->trim(&trimmed, rstroke->trim.begin, rstroke->trim.end);
float trimBegin = rstroke->trim.begin < rstroke->trim.end ? rstroke->trim.begin : rstroke->trim.end;
float trimEnd = rstroke->trim.begin < rstroke->trim.end ? rstroke->trim.end : rstroke->trim.begin;
if (trimBegin == trimEnd) return;
if ((rstroke->dashPattern) && ((trimBegin != 0.0f) || (trimEnd != 1.0f))) {
polyline->trim(&trimmed, trimBegin, trimEnd);
geometryData.appendStrokeDashed(&trimmed, rstroke);
} else // trim -> stroke
if ((rstroke->trim.begin != 0.0f) || (rstroke->trim.end != 1.0f)) {
polyline->trim(&trimmed, rstroke->trim.begin, rstroke->trim.end);
if ((trimBegin != 0.0f) || (trimEnd != 1.0f)) {
polyline->trim(&trimmed, trimBegin, trimEnd);
geometryData.appendStroke(&trimmed, rstroke);
} else // split -> stroke
if (rstroke->dashPattern) {
@ -339,11 +342,13 @@ void WgRenderDataShape::updateMeshes(WgContext& context, const WgPolyline* polyl
geometryData.appendStroke(polyline, rstroke);
}
// append render meshes and bboxes
if(geometryData.positions.pts.count >= 3) {
WgPoint pmin{}, pmax{};
geometryData.positions.getBBox(pmin, pmax);
meshGroupStrokes.append(context, &geometryData);
meshGroupStrokesBBox.append(context, pmin, pmax);
}
}
}