Implemented some additional API functions related to crate::core_types::Color

Signed-off-by: Jacobsky <cael.jacobsen@gmail.com>

Author: jacobsky

gdnative-core/src/core_types/color.rs

@@ -2,6 +2,7 @@ use crate::private::get_api;
 use crate::sys;
 use std::mem::transmute;
 
+use crate::core_types::GodotString;
 /// RGBA color with 32 bits floating point components.
 #[repr(C)]
 #[derive(Copy, Clone, Debug, PartialEq)]
@@ -47,6 +48,68 @@ impl Color {
             a: self.a + (weight * (other.a - self.a)),
         }
     }
+    #[inline]
+    pub fn blend(&self, other: &Color) -> Color {
+        Color::from_sys(unsafe { (get_api().godot_color_blend)(self.sys(), other.sys()) })
+    }
+
+    #[inline]
+    pub fn contrasted(&self) -> Color {
+        Color::from_sys(unsafe { (get_api().godot_color_contrasted)(self.sys()) })
+    }
+    #[inline]
+    pub fn darkened(&self, amount: f32) -> Color {
+        Color::from_sys(unsafe { (get_api().godot_color_darkened)(self.sys(), amount) })
+    }
+    #[inline]
+    pub fn from_hsv(h: f32, s: f32, v: f32, a: f32) -> Color {
+        let color = Color::rgba(0.0, 0.0, 0.0, 0.0);
+        Color::from_sys(unsafe { (get_api().godot_color_from_hsv)(color.sys(), h, s, v, a) })
+    }
+    #[inline]
+    pub fn gray(&self) -> f32 {
+        // Implemented as described in godot docs
+        (self.r + self.b + self.g) / 3.0
+    }
+
+    #[inline]
+    pub fn inverted(&self) -> Color {
+        // Implementation as described in godot docs.
+        Color {
+            r: 1.0f32 - self.r,
+            g: 1.0f32 - self.g,
+            b: 1.0f32 - self.b,
+            a: self.a,
+        }
+    }
+
+    pub fn to_abgr32(&self) -> i32 {
+        unsafe { (get_api().godot_color_to_abgr32)(self.sys()) }
+    }
+
+    pub fn to_abgr64(&self) -> i32 {
+        unsafe { (get_api().godot_color_to_abgr64)(self.sys()) }
+    }
+
+    pub fn to_argb32(&self) -> i32 {
+        unsafe { (get_api().godot_color_to_argb32)(self.sys()) }
+    }
+
+    pub fn to_argb64(&self) -> i32 {
+        unsafe { (get_api().godot_color_to_argb64)(self.sys()) }
+    }
+
+    pub fn to_html(&self, with_alpha: bool) -> GodotString {
+        GodotString::from_sys(unsafe { (get_api().godot_color_to_html)(self.sys(), with_alpha) })
+    }
+
+    pub fn to_rgba32(&self) -> i32 {
+        unsafe { (get_api().godot_color_to_rgba32)(self.sys()) }
+    }
+
+    pub fn to_rgba64(&self) -> i32 {
+        unsafe { (get_api().godot_color_to_rgba64)(self.sys()) }
+    }
 
     #[doc(hidden)]
     #[inline]
@@ -72,3 +135,49 @@ fn color_repr() {
     use std::mem::size_of;
     assert_eq!(size_of::<Color>(), size_of::<sys::godot_color>());
 }
+
+godot_test!(test_color {
+    // Test to_html
+    assert_eq!("ffffffff", Color::rgba(1.0, 1.0, 1.0, 1.0).to_html(true).to_string());
+    assert_eq!("ffffff", Color::rgba(1.0, 1.0, 1.0, 1.0).to_html(false).to_string());
+    assert_eq!("80ffffff", Color::rgba(1.0, 1.0, 1.0, 0.5).to_html(true).to_string());
+    assert_eq!("ffffff", Color::rgba(1.0, 1.0, 1.0, 0.5).to_html(false).to_string());
+    assert_eq!("ff8000", Color::rgb(1.0, 0.5, 0.0).to_html(false).to_string());
+    assert_eq!("ff0080ff", Color::rgb(0.0, 0.5, 1.0).to_html(true).to_string());
+    // Test Gray
+    // String comparison due to non-trivial way to truncate floats
+    use crate::core_types::IsEqualApprox;
+    assert!(0.4f32.is_equal_approx(Color::rgb(0.2, 0.4, 0.6).gray()));
+    assert!(0.5f32.is_equal_approx(Color::rgb(0.1, 0.5, 0.9).gray()));
+    assert!(0.9f32.is_equal_approx(Color::rgb(1.0, 1.0, 0.7).gray()));
+    assert!(0.42f32.is_equal_approx(Color::rgb(0.6, 0.6, 0.06).gray()));
+    // Test invert
+    let inverted = Color::rgb(1.0, 1.0,1.0).inverted();
+    assert!(0f32.is_equal_approx(inverted.r));
+    assert!(0f32.is_equal_approx(inverted.g));
+    assert!(0f32.is_equal_approx(inverted.b));
+
+    let inverted = Color::rgb(0.95, 0.95,0.95).inverted();
+    assert!(0.05f32.is_equal_approx(inverted.r));
+    assert!(0.05f32.is_equal_approx(inverted.g));
+    assert!(0.05f32.is_equal_approx(inverted.b));
+
+    let inverted = Color::rgb(0.05, 0.95,0.55).inverted();
+    assert!(0.95f32.is_equal_approx(inverted.r));
+    assert!(0.05f32.is_equal_approx(inverted.g));
+    assert!(0.45f32.is_equal_approx(inverted.b));
+
+    // This is a series of sanity checks to test that the API bounds work properly.
+    let color = Color::from_hsv(1.0, 1.0, 1.0, 1.0);
+    color.darkened(0.20);
+    color.contrasted();
+    color.inverted();
+    color.to_rgba32();
+    color.to_rgba64();
+    color.to_abgr32();
+    color.to_abgr64();
+    color.to_argb32();
+    color.to_argb64();
+    let other_color = Color::rgba(1.0, 1.0, 1.0, 1.0);
+    color.blend(&other_color);
+});

test/src/lib.rs

@@ -22,7 +22,7 @@ pub extern "C" fn run_tests(
 
     status &= gdnative::core_types::dictionary::test_dictionary();
     // status &= gdnative::test_dictionary_clone_clear();
-
+    status &= gdnative::core_types::test_color();
     status &= gdnative::core_types::test_array();
     status &= gdnative::core_types::test_array_debug();
     // status &= gdnative::test_array_clone_clear();