web: reduce mem used during drawing of board

1 files changed, 63 insertions, 82 deletions

diff --git a/web/web_svg.c b/web/web_svg.c
index 125f8a4..70dc900 100644
--- a/web/web_svg.c
+++ b/web/web_svg.c
@@ -14,8 +14,8 @@
 #define C_GREEN "#22912d"
 #define C_WIRE "#909ca0"
 #define C_WIRE_INNER "#d8e6ec"
-#define C_NUMBER_RING "#ddd"
 #define C_NUMBER "#fff"
+#define C_NUMBER_RING "#ddd"
 #define C_POINT "#33f"
 #define C_POINT_OUTLINE "#ff0"
 
@@ -31,7 +31,6 @@ static struct dom_elem *gen_circle(double r, char *col)
 	struct dom_elem *e = svg_elem_init("circle", 2);
 	dom_elem_add_attrd(e, "r", r);
 	dom_elem_add_attr(e, "fill", col);
-
 	return e;
 }
 
@@ -39,6 +38,8 @@ static struct dom_elem *gen_circle(double r, char *col)
 static struct dom_elem *gen_arc(double a1, double a2, double r1, double r2,
 	char *col)
 {
+	struct dom_elem *e = svg_elem_init("path", 2);
+
 	bool ring = (a1 == a2);
 	if (ring) {
 		// these values are not significant. the ring is drawn as two
@@ -53,9 +54,6 @@ static struct dom_elem *gen_arc(double a1, double a2, double r1, double r2,
 	struct ccoords cc3 = pol_to_cart((struct pcoords){ .a = a1, .r = r2 });
 	struct ccoords cc4 = pol_to_cart((struct pcoords){ .a = a2, .r = r2 });
 
-	struct dom_elem *e = svg_elem_init("path", 2);
-	dom_elem_add_attr(e, "fill", col);
-
 	// (arc)
 	// M - move to inner start
 	// A - draw arc to inner end
@@ -89,6 +87,7 @@ static struct dom_elem *gen_arc(double a1, double a2, double r1, double r2,
 			r2, r2, cc3.x, cc3.y);
 	dom_elem_add_attr(e, "d", buf);
 
+	dom_elem_add_attr(e, "fill", col);
 	return e;
 }
 
@@ -106,151 +105,133 @@ static struct dom_elem *gen_segment(double a, double r1, double r2, char *col)
 static struct dom_elem *gen_line(double a, double r1, double r2, double w,
 	char *col)
 {
+	struct dom_elem *e = svg_elem_init("line", 6);
+
 	struct ccoords cc1 = pol_to_cart((struct pcoords){ .a = a, .r = r1 });
 	struct ccoords cc2 = pol_to_cart((struct pcoords){ .a = a, .r = r2 });
-
-	struct dom_elem *e = svg_elem_init("line", 6);
 	dom_elem_add_attrd(e, "x1", cc1.x);
 	dom_elem_add_attrd(e, "y1", cc1.y);
 	dom_elem_add_attrd(e, "x2", cc2.x);
 	dom_elem_add_attrd(e, "y2", cc2.y);
+
 	dom_elem_add_attr(e, "stroke", col);
 	dom_elem_add_attrd(e, "stroke-width", w);
-
 	return e;
 }
 
-static int gen_segments(struct dom_elem **elemv)
+static void add_segments(struct dom_elem *e)
 {
-	int elemc = 0;
-
 	for (int i = R_DOUBLE; i > R_25; --i) {
 		for (int j = 0; j < NUM_SECTORS; ++j) {
 			double a = 90 - (j * SECTOR_WIDTH);
 			if (a < 0)
 				a += 360;
-			elemv[elemc++] = gen_segment(a, OUTER_DISTS[i - 1],
-				OUTER_DISTS[i],
-				i % 2 ? (j % 2 ? C_GREEN : C_RED) :
-					(j % 2 ? C_WHITE : C_BLACK));
+			dom_elem_add_child(e,
+				gen_segment(a, OUTER_DISTS[i - 1],
+					OUTER_DISTS[i],
+					i % 2 ? (j % 2 ? C_GREEN : C_RED) :
+						(j % 2 ? C_WHITE : C_BLACK)));
 		}
 	}
 
-	elemv[elemc++] = gen_circle(OUTER_DISTS[R_25], C_GREEN);
-	elemv[elemc++] = gen_circle(OUTER_DISTS[R_BULL], C_RED);
-
-	return elemc;
+	dom_elem_add_child(e, gen_circle(OUTER_DISTS[R_25], C_GREEN));
+	dom_elem_add_child(e, gen_circle(OUTER_DISTS[R_BULL], C_RED));
 }
 
-static int gen_wires(struct dom_elem **elemv)
+static void add_wires(struct dom_elem *e)
 {
-	int elemc = 0;
-
 	for (int i = R_DOUBLE; i > R_25; --i) {
-		elemv[elemc++] = gen_ring(OUTER_DISTS[i], WIRE_WIDTH, C_WIRE);
-		elemv[elemc++] = gen_ring(OUTER_DISTS[i], WIRE_WIDTH / 2,
-			C_WIRE_INNER);
+		dom_elem_add_child(e,
+			gen_ring(OUTER_DISTS[i], WIRE_WIDTH, C_WIRE));
+		dom_elem_add_child(e,
+			gen_ring(OUTER_DISTS[i], WIRE_WIDTH / 2,
+				C_WIRE_INNER));
 	}
 
 	for (int i = 0; i < NUM_SECTORS; ++i) {
 		double a = 90 - (i * SECTOR_WIDTH) - (SECTOR_WIDTH / 2);
 		if (a < 0)
 			a += 360;
-		elemv[elemc++] = gen_line(a, OUTER_DISTS[R_25],
-			OUTER_DISTS[R_DOUBLE] + 10, WIRE_WIDTH, C_WIRE);
-		elemv[elemc++] = gen_line(a, OUTER_DISTS[R_25],
-			OUTER_DISTS[R_DOUBLE] + 10, WIRE_WIDTH / 2,
-			C_WIRE_INNER);
+		dom_elem_add_child(e,
+			gen_line(a, OUTER_DISTS[R_25],
+				OUTER_DISTS[R_DOUBLE] + 10,
+				WIRE_WIDTH, C_WIRE));
+		dom_elem_add_child(e,
+			gen_line(a, OUTER_DISTS[R_25],
+				OUTER_DISTS[R_DOUBLE] + 10,
+				WIRE_WIDTH / 2, C_WIRE_INNER));
 	}
 
 	for (int i = R_25; i >= R_BULL; --i) {
-		elemv[elemc++] = gen_ring(OUTER_DISTS[i], WIRE_WIDTH, C_WIRE);
-		elemv[elemc++] = gen_ring(OUTER_DISTS[i], WIRE_WIDTH / 2,
-			C_WIRE_INNER);
+		dom_elem_add_child(e,
+			gen_ring(OUTER_DISTS[i], WIRE_WIDTH, C_WIRE));
+		dom_elem_add_child(e,
+			gen_ring(OUTER_DISTS[i], WIRE_WIDTH / 2,
+				C_WIRE_INNER));
 	}
-
-	return elemc;
 }
 
-static int gen_numbers(struct dom_elem **elemv)
+static void add_numbers(struct dom_elem *e)
 {
-	int elemc = 0;
-
-	elemv[elemc++] = gen_ring((DIAMETER / 2) - (WIRE_WIDTH * 4),
-		WIRE_WIDTH, C_NUMBER_RING);
+	dom_elem_add_child(e,
+		gen_ring((DIAMETER / 2) - (WIRE_WIDTH * 4),
+			WIRE_WIDTH, C_NUMBER_RING));
 
 	int r = (DIAMETER / 2) - (33 / 2);
 	for (int i = 0; i < NUM_SECTORS; ++i) {
-		struct dom_elem *e = svg_elem_init("text", 5);
-		elemv[elemc++] = e;
-
-		dom_elem_add_attr(e, "font-size", "33");
-		dom_elem_add_attr(e, "text-anchor", "middle");
-		dom_elem_add_attr(e, "dominant-baseline", "central");
-		dom_elem_add_attr(e, "fill", C_NUMBER);
+		struct dom_elem *c = svg_elem_init("text", 5);
+		asprintf(&c->content, "%d", SECTORS[i]);
 
 		double a = 90 - (i * SECTOR_WIDTH);
 		if (a < 0)
 			a += 360;
 		struct ccoords cc = pol_to_cart(
 			(struct pcoords){ .a = a, .r = r });
-		dom_elem_add_attrf(e, "transform",
+		dom_elem_add_attrf(c, "transform",
 			"scale(1 -1) translate(%f %f) rotate(%f)",
 			cc.x, -cc.y, a <= 180 ? 90 - a : 270 - a);
 
-		asprintf(&e->content, "%d", SECTORS[i]);
+		dom_elem_add_attr(c, "font-size", "33");
+		dom_elem_add_attr(c, "text-anchor", "middle");
+		dom_elem_add_attr(c, "dominant-baseline", "central");
+		dom_elem_add_attr(c, "fill", C_NUMBER);
+		dom_elem_add_child(e, c);
 	}
-
-	return elemc;
 }
 
-static void draw_board()
+static void add_board(struct dom_elem *e)
 {
-	struct dom_elem **elemv = malloc(200 * sizeof(*elemv));
-	int elemc = 0;
-
-	elemv[elemc++] = gen_circle(DIAMETER / 2, C_BLACK);
-	elemc += gen_segments(elemv + elemc);
-	elemc += gen_wires(elemv + elemc);
-	elemc += gen_numbers(elemv + elemc);
-
-	dom_append_elemv("#dartboard .base", elemc, elemv);
-
-	for (int i = 0; i < elemc; ++i)
-		dom_elem_free(elemv[i]);
-	free(elemv);
+	dom_elem_add_child(e, gen_circle(DIAMETER / 2, C_BLACK));
+	add_segments(e);
+	add_wires(e);
+	add_numbers(e);
 }
 
-static void create_board()
+static void draw_board()
 {
-	struct dom_elem *e = svg_elem_init("svg", 2);
-	dom_elem_add_attr(e, "id", "dartboard");
-	dom_elem_add_attrf(e, "viewBox", "0 0 %f %f", DIAMETER, DIAMETER);
-	dom_append_elemv("#dartboard-container", 1, &e);
-	free(e);
-
-	struct dom_elem **elemv = malloc(2 * sizeof(*elemv));
-	int elemc = 0;
+	struct dom_elem *svg = svg_elem_init("svg", 2);
+	dom_elem_add_attr(svg, "id", "dartboard");
+	dom_elem_add_attrf(svg, "viewBox", "0 0 %f %f", DIAMETER, DIAMETER);
 
 	for (int i = 0; i < 2; ++i) {
 		struct dom_elem *e = svg_elem_init("g", 2);
-		dom_elem_add_attr(e, "class", i ? "overlay" : "base");
+		dom_elem_add_attr(e, "class", i ? "overlay" : "board");
 		dom_elem_add_attrf(e, "transform",
 			"translate(%f %f) scale(1 -1)",
 			DIAMETER / 2, DIAMETER / 2);
-		elemv[elemc++] = e;
-	}
 
-	dom_append_elemv("#dartboard", elemc, elemv);
+		if (!i)
+			add_board(e);
+
+		dom_elem_add_child(svg, e);
+	}
 
-	for (int i = 0; i < elemc; ++i)
-		dom_elem_free(elemv[i]);
-	free(elemv);
+	dom_append_elemv("#dartboard-container", 1, &svg);
+	dom_elem_free(svg);
 }
 
 void svg_init()
 {
-	create_board();
 	draw_board();
 }