gg: fix draw_image on macos native; vcreate: vweb template

vlib/builtin/array.v

@@ -14,7 +14,7 @@ pub:
 	element_size int // size in bytes of one element in the array.
 pub mut:
 	data   voidptr
-	offset int // in bytes (should be `usize`)
+	offset int // in bytes (should be `usize`), to avoid copying data while making slices, unless it starts changing
 	len    int // length of the array in elements.
 	cap    int // capacity of the array in elements.
 	flags  ArrayFlags

vlib/gg/gg.c.v

@@ -307,6 +307,7 @@ fn gg_frame_fn(mut ctx Context) {
 	ctx.record_frame()
 
 	if ctx.ui_mode && !ctx.needs_refresh {
+		// println('ui mode, exiting')
 		// Draw 3 more frames after the "stop refresh" command
 		ctx.ticks++
 		if ctx.ticks > 3 {

vlib/gg/image.c.v

@@ -109,23 +109,6 @@ pub fn (mut img Image) init_sokol_image() &Image {
 
 // draw_image draws the provided image onto the screen.
 pub fn (ctx &Context) draw_image(x f32, y f32, width f32, height f32, img_ &Image) {
-	$if macos {
-		if img_.id >= ctx.image_cache.len {
-			eprintln('gg: draw_image() bad img id ${img_.id} (img cache len = ${ctx.image_cache.len})')
-			return
-		}
-		if ctx.native_rendering {
-			if img_.width == 0 {
-				return
-			}
-			if !os.exists(img_.path) {
-				return
-			}
-			C.darwin_draw_image(x, ctx.height - (y + height), width, height, img_)
-			return
-		}
-	}
-
 	ctx.draw_image_with_config(
 		img: img_
 		img_rect: Rect{x, y, width, height}
@@ -273,6 +256,41 @@ pub struct StreamingImageConfig {
 // draw_image_with_config takes in a config that details how the
 // provided image should be drawn onto the screen
 pub fn (ctx &Context) draw_image_with_config(config DrawImageConfig) {
+	$if macos {
+		unsafe {
+			mut img := config.img
+			if config.img == nil {
+				// Get image by id
+				if config.img_id > 0 {
+					img = &ctx.image_cache[config.img_id]
+				} else {
+					eprintln('gg: failed to get image to draw natively')
+					return
+				}
+			}
+			if img.id >= ctx.image_cache.len {
+				eprintln('gg: draw_image() bad img id ${img.id} (img cache len = ${ctx.image_cache.len})')
+				return
+			}
+			if ctx.native_rendering {
+				if img.width == 0 {
+					println('w=0')
+					return
+				}
+				if !os.exists(img.path) {
+					println('not exist path')
+					return
+				}
+				x := config.img_rect.x
+				y := config.img_rect.y
+				C.darwin_draw_image(x, ctx.height - (y + config.img_rect.height), config.img_rect.width,
+					config.img_rect.height, img)
+				println('ok')
+				return
+			}
+		}
+	}
+
 	id := if !isnil(config.img) { config.img.id } else { config.img_id }
 	if id >= ctx.image_cache.len {
 		eprintln('gg: draw_image() bad img id ${id} (img cache len = ${ctx.image_cache.len})')