Working example

sdl3/ttf/sdl3_textengine.odin

@@ -0,0 +1,62 @@
+package sdl3_ttf
+
+import "core:c"
+import SDL "vendor:sdl3"
+
+DrawCommand :: enum c.int {
+	NOOP,
+	FILL,
+	COPY,
+}
+
+FillOperation :: struct {
+	cmd:  DrawCommand,
+	rect: SDL.Rect,
+}
+
+CopyOperation :: struct {
+	cmd:         DrawCommand,
+	text_offset: c.int,
+	glyph_font:  ^Font,
+	glyph_index: u32,
+	src:         SDL.Rect,
+	dst:         SDL.Rect,
+	reserved:    rawptr,
+}
+
+DrawOperation :: struct #raw_union {
+	cmd:  DrawCommand,
+	fill: FillOperation,
+	copy: CopyOperation,
+}
+
+TextLayout :: struct {}
+
+TextData :: struct {
+	font:                ^Font,
+	color:               SDL.FColor,
+	needs_layout_update: bool,
+	layout:              ^TextLayout,
+	x, y:                c.int,
+	w, h:                c.int,
+	num_ops:             c.int,
+	ops:                 [^]DrawOperation `fmt:"v,num_ops"`,
+	num_clusters:        c.int,
+	clusters:            [^]SubString     `fmt:"v,num_clusters"`,
+	props:               SDL.PropertiesID,
+	needs_engine_update: bool,
+	engine:              ^TextEngine,
+	engine_text:         rawptr,
+}
+
+TextEngine :: struct {
+	version:     u32,
+	userdata:    rawptr,
+	CreateText:  proc "c" (userdata: rawptr, text: ^Text) -> bool,
+	DestroyText: proc "c" (userdata: rawptr, Textext: ^Text),
+}
+
+#assert(
+	(size_of(TextEngine) == 16 && size_of(rawptr) == 4) ||
+	(size_of(TextEngine) == 32 && size_of(rawptr) == 8),
+)