Frox/Vektor
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feat(experimental): add rectangle shape support

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This commit is contained in:
Beriff
2026-03-10 02:02:22 +07:00
parent 2bdcbfae1f
commit 61f9f1eed0
7 changed files with 112 additions and 18 deletions
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26
src/core/raster.c
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@@ -12,7 +12,7 @@ void vektor_edgebuffer_add_edge(EdgeBuffer* buffer, Edge edge) {
buffer->edges[buffer->count++] = edge;
}
void vektor_polyline_flatten(EdgeBuffer* buffer, VektorPolyline* line,
void vektor_polyline_tessellate(EdgeBuffer* buffer, VektorPolyline* line,
size_t j) {
for (size_t i = 0; i + 1 < line->count; i++) {
vektor_edgebuffer_add_edge(
@@ -20,7 +20,7 @@ void vektor_polyline_flatten(EdgeBuffer* buffer, VektorPolyline* line,
}
}
void vektor_polygon_flatten(EdgeBuffer* buffer, VektorPolygon* polygon,
void vektor_polygon_tessellate(EdgeBuffer* buffer, VektorPolygon* polygon,
size_t j) {
for (size_t i = 0; i + 1 < polygon->count; i++) {
vektor_edgebuffer_add_edge(
@@ -30,6 +30,20 @@ void vektor_polygon_flatten(EdgeBuffer* buffer, VektorPolygon* polygon,
buffer, (Edge){polygon->points[polygon->count - 1], polygon->points[0], 0, j});
}
void vektor_rectangle_tessellate(EdgeBuffer* buffer, VektorRectangle* rct, size_t j) {
if (vec2_equals(rct->end, rct->start)) {return;}
Edge top = (Edge){rct->start, (V2){rct->end.x, rct->start.y}, 0, j };
Edge right = (Edge){(V2){rct->end.x, rct->start.y}, rct->end, 0, j};
Edge bottom = (Edge){(V2){rct->start.x, rct->end.y}, rct->end, 0, j};
Edge left = (Edge){rct->start, (V2){rct->start.x, rct->end.y}, 0, j };
vektor_edgebuffer_add_edge(buffer, top);
vektor_edgebuffer_add_edge(buffer, right);
vektor_edgebuffer_add_edge(buffer, bottom);
vektor_edgebuffer_add_edge(buffer, left);
}
void vektor_rasterize(VertexBuffer* vb, VektorShapeBuffer* shapes) {
EdgeBuffer edges = {0};
for (size_t i = 0; i < shapes->count; i++) {
@@ -37,11 +51,15 @@ void vektor_rasterize(VertexBuffer* vb, VektorShapeBuffer* shapes) {
switch (p->kind) {
case VEKTOR_POLYLINE:
vektor_polyline_flatten(&edges, p->polyline, i);
vektor_polyline_tessellate(&edges, p->polyline, i);
break;
case VEKTOR_POLYGON:
vektor_polygon_flatten(&edges, p->polygon, i);
vektor_polygon_tessellate(&edges, p->polygon, i);
break;
case VEKTOR_RECTANGLE:
vektor_rectangle_tessellate(&edges, &p->rectangle, i);
break;
default: