librsvg source for verification 2026-05-22

doc/load-and-render.c

@@ -0,0 +1,59 @@
+/* gcc -Wall -g -O2 -o load-and-render load-and-render.c `pkg-config --cflags --libs rsvg-2.0` */
+
+#include <stdlib.h>
+#include <librsvg/rsvg.h>
+
+#define WIDTH 640
+#define HEIGHT 480
+
+int
+main (void)
+{
+  /* First, load an SVG document into an RsvgHandle */
+
+  GError *error = NULL;
+  GFile *file = g_file_new_for_path ("hello.svg");
+  RsvgHandle *handle = rsvg_handle_new_from_gfile_sync (file, RSVG_HANDLE_FLAGS_NONE, NULL, &error);
+
+  if (!handle)
+    {
+      g_printerr ("could not load: %s", error->message);
+      exit (1);
+    }
+
+  /* Create a Cairo image surface and a rendering context for it */
+
+  cairo_surface_t *surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, WIDTH, HEIGHT);
+  cairo_t *cr = cairo_create (surface);
+
+  /* Render the handle scaled proportionally into that whole surface */
+
+  RsvgRectangle viewport = {
+    .x = 0.0,
+    .y = 0.0,
+    .width = WIDTH,
+    .height = HEIGHT,
+  };
+
+  if (!rsvg_handle_render_document (handle, cr, &viewport, &error))
+    {
+      g_printerr ("could not render: %s", error->message);
+      exit (1);
+    }
+
+  /* Write a PNG file */
+
+  if (cairo_surface_write_to_png (surface, "hello.png") != CAIRO_STATUS_SUCCESS)
+    {
+      g_printerr ("could not write output file");
+      exit (1);
+    }
+
+  /* Free our memory and we are done! */
+
+  cairo_destroy (cr);
+  cairo_surface_destroy (surface);
+  g_object_unref (handle);
+  g_object_unref (file);
+  return 0;
+}