Merge pull request #63 from firefly-zero/tiling

draw_sub_tile and draw_nine_slice

Author: orsinium

example/audio/main.mbt

@@ -8,21 +8,5 @@ fn main {
 pub fn boot() -> Unit {
   @audio.out.add_file(b"pickupCoin") |> ignore
   let gain = @audio.out.add_gain(0.5)
-  gain.add_sine(@audio.A4, 1) |> ignore
-}
-
-///|
-/// update is called ~60 times per second.
-pub fn update() -> Unit {
-
-}
-
-///|
-/// render is called before updating the image on the screen.
-///
-/// It might be called less often than `update` if the device sees that the game
-/// is slow and needs more resources.
-/// This is the best place to call all drawing functions.
-pub fn render() -> Unit {
-
+  gain.add_sine(@audio.A4, 0) |> ignore
 }

src/graphics.mbt

@@ -263,6 +263,56 @@ pub fn draw_sub_image(sub_image : SubImage, point : Point) -> Unit {
   sub_image.image |> @memory.keep
 }
 
+///|
+/// Tile the given screen area with the provided sub-image.
+pub fn draw_sub_tile(sub_image : SubImage, point : Point, size : Size) -> Unit {
+  @ffi.draw_sub_tile(
+    @memory.fixedbytes_addr(sub_image.image.0),
+    @memory.fixedbytes_size(sub_image.image.0),
+    point.x,
+    point.y,
+    size.w,
+    size.h,
+    sub_image.point_x,
+    sub_image.point_y,
+    sub_image.size_w,
+    sub_image.size_h,
+  )
+  sub_image.image |> @memory.keep
+}
+
+///|
+/// Fill the given area with the given 9-slice.
+///
+/// A 9-slice is used to tile an area with 9 sub-images: 4 corners,
+/// 4 edges, and 1 middle segment. It is useful for speech bubbles
+/// and other stylish boxes.
+///
+/// The whole image is the 9-slice. The sub-image is the center area of the 9-slice.
+///
+/// If the target area is bigger than the 9-slice segments,
+/// all the segments (except corners) are repeated ("tiled")
+/// without stretching or mirroring.
+pub fn draw_nine_slice(
+  sub_image : SubImage,
+  point : Point,
+  size : Size,
+) -> Unit {
+  @ffi.draw_nine_slice(
+    @memory.fixedbytes_addr(sub_image.image.0),
+    @memory.fixedbytes_size(sub_image.image.0),
+    point.x,
+    point.y,
+    size.w,
+    size.h,
+    sub_image.point_x,
+    sub_image.point_y,
+    sub_image.size_w,
+    sub_image.size_h,
+  )
+  sub_image.image |> @memory.keep
+}
+
 ///|
 /// Reference to the current image. Kept to make sure the image doesn't
 /// get garbage collected.

src/internal/ffi/graphics.mbt

@@ -164,6 +164,34 @@ pub fn draw_sub_image(
   sub_height : Int,
 ) = "graphics" "draw_sub_image"
 
+///|
+pub fn draw_sub_tile(
+  image_ptr : UInt,
+  image_len : Int,
+  x : Int,
+  y : Int,
+  w : Int,
+  h : Int,
+  sub_x : Int,
+  sub_y : Int,
+  sub_width : Int,
+  sub_height : Int,
+) = "graphics" "draw_sub_tile"
+
+///|
+pub fn draw_nine_slice(
+  image_ptr : UInt,
+  image_len : Int,
+  x : Int,
+  y : Int,
+  w : Int,
+  h : Int,
+  sub_x : Int,
+  sub_y : Int,
+  sub_width : Int,
+  sub_height : Int,
+) = "graphics" "draw_nine_slice"
+
 ///|
 /// Set the target image for all subsequent drawing operations.
 ///