♻️ Refactor into render submodules

render-wasm/src/render/gpu_state.rs

@@ -0,0 +1,45 @@
+use skia_safe as skia;
+use skia_safe::gpu::{self, gl::FramebufferInfo, DirectContext};
+
+pub struct GpuState {
+    pub context: DirectContext,
+    framebuffer_info: FramebufferInfo,
+}
+
+impl GpuState {
+    pub fn new() -> Self {
+        let interface = gpu::gl::Interface::new_native().unwrap();
+        let context = gpu::direct_contexts::make_gl(interface, None).unwrap();
+        let framebuffer_info = {
+            let mut fboid: gl::types::GLint = 0;
+            unsafe { gl::GetIntegerv(gl::FRAMEBUFFER_BINDING, &mut fboid) };
+
+            FramebufferInfo {
+                fboid: fboid.try_into().unwrap(),
+                format: gpu::gl::Format::RGBA8.into(),
+                protected: gpu::Protected::No,
+            }
+        };
+
+        GpuState {
+            context,
+            framebuffer_info,
+        }
+    }
+
+    /// Create a Skia surface that will be used for rendering.
+    pub fn create_target_surface(&mut self, width: i32, height: i32) -> skia::Surface {
+        let backend_render_target =
+            gpu::backend_render_targets::make_gl((width, height), 1, 8, self.framebuffer_info);
+
+        gpu::surfaces::wrap_backend_render_target(
+            &mut self.context,
+            &backend_render_target,
+            gpu::SurfaceOrigin::BottomLeft,
+            skia::ColorType::RGBA8888,
+            None,
+            None,
+        )
+        .unwrap()
+    }
+}