source code

libs/scrap/src/quartz/config.rs

@@ -0,0 +1,75 @@
+use std::ptr;
+
+use libc::c_void;
+
+use super::ffi::*;
+
+//TODO: Color space, YCbCr matrix.
+pub struct Config {
+    /// Whether the cursor is visible.
+    pub cursor: bool,
+    /// Whether it should letterbox or stretch.
+    pub letterbox: bool,
+    /// Minimum seconds per frame.
+    pub throttle: f64,
+    /// How many frames are allocated.
+    /// 3 is the recommended value.
+    /// 8 is the maximum value.
+    pub queue_length: i8,
+}
+
+impl Config {
+    /// Don't forget to CFRelease this!
+    pub fn build(self) -> CFDictionaryRef {
+        unsafe {
+            let throttle = CFNumberCreate(
+                ptr::null_mut(),
+                CFNumberType::Float64,
+                &self.throttle as *const _ as *const c_void,
+            );
+            let queue_length = CFNumberCreate(
+                ptr::null_mut(),
+                CFNumberType::SInt8,
+                &self.queue_length as *const _ as *const c_void,
+            );
+
+            let keys: [CFStringRef; 4] = [
+                kCGDisplayStreamShowCursor,
+                kCGDisplayStreamPreserveAspectRatio,
+                kCGDisplayStreamMinimumFrameTime,
+                kCGDisplayStreamQueueDepth,
+            ];
+            let values: [*mut c_void; 4] = [
+                cfbool(self.cursor),
+                cfbool(self.letterbox),
+                throttle,
+                queue_length,
+            ];
+
+            let res = CFDictionaryCreate(
+                ptr::null_mut(),
+                keys.as_ptr(),
+                values.as_ptr(),
+                4,
+                &kCFTypeDictionaryKeyCallBacks,
+                &kCFTypeDictionaryValueCallBacks,
+            );
+
+            CFRelease(throttle);
+            CFRelease(queue_length);
+
+            res
+        }
+    }
+}
+
+impl Default for Config {
+    fn default() -> Config {
+        Config {
+            cursor: false,
+            letterbox: true,
+            throttle: 0.0,
+            queue_length: 3,
+        }
+    }
+}