odin-nanosvg

commit c527a753aca14569d4261e89eb60175264ee8f3f
parent 8c19a63e3cb9bdd8a6545b0ddad936d60fa2759a
Author: Jack Mordaunt <jackmordaunt.dev@gmail.com>
Date:   Mon,  7 Jul 2025 12:42:31 -0300

example: rasterize the svg to png

This is a more complete and useful demonstration.

Diffstat:
M
example/example.odin
 | 
46
+++++++++++++++++++++++++++++++++-------------

1 file changed, 33 insertions(+), 13 deletions(-)
diff --git a/example/example.odin b/example/example.odin
@@ -1,9 +1,12 @@
 package main
 
+import "core:c"
 import "core:fmt"
+import "core:math"
 import "core:os/os2"
 import "core:path/filepath"
-import "core:slice"
+
+import "vendor:stb/image"
 
 import nanosvg "../"
 
@@ -24,20 +27,37 @@ main :: proc() {
 		name = "example/sample.svg"
 	}
 
+	// Parse the svg.
 	img := nanosvg.ParseFromFile(name, "px", 96)
 	defer nanosvg.Delete(img)
 
-	fmt.println(img)
-
-	for shape := img.shapes; shape != nil; shape = shape.next {
-		fmt.println()
-		fmt.println(shape)
-		for path := shape.paths; path != nil; path = path.next {
-			fmt.println(path)
-			for path in slice.from_ptr(path.pts, int(path.npts)) {
-				fmt.println(path)
-			}
-		}
-	}
+	// Rasterize the svg.
+	r := nanosvg.CreateRasterizer()
+	defer nanosvg.DeleteRasterizer(r)
+
+	buf := make([]byte, int(math.ceil(img.width) * img.height) * 4)
+	defer delete(buf)
+
+	nanosvg.Rasterize(
+		r,
+		img,
+		0,
+		0,
+		1,
+		raw_data(buf),
+		c.int(img.width),
+		c.int(img.height),
+		c.int(math.ceil(img.width) * 4),
+	)
+
+	// Write png to disk.
+	image.write_png(
+		"out.png",
+		c.int(img.width),
+		c.int(img.height),
+		4,
+		raw_data(buf),
+		c.int(math.ceil(img.width) * 4),
+	)
 }