implement brush changing

abletk-common/src/brush.rs

@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2022 Umut İnan Erdoğan <umutinanerdogan@pm.me>
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#[cfg(windows)]
+use abletk_direct2d::brush::Brush as RawBrush;
+
+use crate::color::Color;
+
+#[derive(Copy, Clone, Debug)]
+pub enum Brush {
+    Solid(Color),
+}
+
+impl From<Brush> for RawBrush {
+    fn from(brush: Brush) -> Self {
+        match brush {
+            Brush::Solid(color) => RawBrush::Solid(color.into()),
+        }
+    }
+}

abletk-common/src/lib.rs

@@ -6,9 +6,11 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  */
 
+pub mod brush;
 pub mod color;
 pub mod rect;
 
+use brush::Brush;
 use raw_window_handle::RawWindowHandle;
 use color::Color;
 use rect::Rect;
@@ -56,6 +58,10 @@ impl Renderer {
         self.renderer.resized(width, height)
     }
     
+    pub fn set_brush(&mut self, brush: Brush) {
+        self.renderer.set_brush(brush.into())
+    }
+
     pub fn size(&self) -> (f32, f32) {
         self.renderer.size()
     }

abletk-direct2d/src/brush.rs

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2022 Umut İnan Erdoğan <umutinanerdogan@pm.me>
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+use std::mem;
+
+use windows::{
+    Foundation::Numerics::*,
+    Win32::Graphics::Direct2D::Common::*, Win32::Graphics::Direct2D::*,
+};
+
+/// The default brush color is black.
+pub(crate) const DEFAULT_BRUSH_COLOR: D2D1_COLOR_F = D2D1_COLOR_F {
+    r: 0.0,
+    g: 0.0,
+    b: 0.0,
+    a: 1.0,
+};
+
+pub(crate) const DEFAULT_BRUSH_PROPERTIES: D2D1_BRUSH_PROPERTIES = D2D1_BRUSH_PROPERTIES {
+    opacity: 1.0,
+    // Matrix3x2::identity() is not a const fn but it could be
+    //
+    // I (TheOddGarlic) sent windows-rs a PR and it got merged but now we wait
+    // for it to be included in the next release
+    transform: Matrix3x2 {
+        M11: 1.0, M12: 0.0, M21: 0.0, M22: 1.0, M31: 0.0, M32: 0.0
+    }
+};
+
+
+#[derive(Copy, Clone, Debug)]
+pub enum Brush {
+    Solid(D2D1_COLOR_F),
+}
+
+impl Brush {
+    pub(crate) fn to_brush(&self, target: &ID2D1HwndRenderTarget) -> ID2D1Brush {
+        match self {
+            Brush::Solid(color) => unsafe {
+                mem::transmute(
+                    target.CreateSolidColorBrush(
+                        color,
+                        &DEFAULT_BRUSH_PROPERTIES,
+                    ).unwrap()
+                )
+            },
+        }
+    }
+}

abletk-direct2d/src/lib.rs

@@ -6,39 +6,23 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  */
 
+pub mod brush;
+
 use std::mem;
+use brush::{Brush, DEFAULT_BRUSH_COLOR};
 use raw_window_handle::Win32Handle;
 use windows::{
-    core::Interface, Foundation::Numerics::*, Win32::Foundation::*,
+    core::Interface, Win32::Foundation::*,
     Win32::Graphics::Direct2D::Common::*, Win32::Graphics::Direct2D::*,
     Win32::Graphics::DirectWrite::*, Win32::UI::WindowsAndMessaging::*,
 };
 
-/// The default brush color is black.
-const DEFAULT_BRUSH_COLOR: D2D1_COLOR_F = D2D1_COLOR_F {
-    r: 0.0,
-    g: 0.0,
-    b: 0.0,
-    a: 1.0,
-};
-
-const DEFAULT_BRUSH_PROPERTIES: D2D1_BRUSH_PROPERTIES = D2D1_BRUSH_PROPERTIES {
-    opacity: 1.0,
-    // Matrix3x2::identity() is not a const fn but it could be
-    //
-    // I (TheOddGarlic) sent windows-rs a PR and it got merged but now we wait
-    // for it to be included in the next release
-    transform: Matrix3x2 {
-        M11: 1.0, M12: 0.0, M21: 0.0, M22: 1.0, M31: 0.0, M32: 0.0
-    }
-};
-
 pub struct Renderer {
     handle: Win32Handle,
     factory: ID2D1Factory1,
     dw_factory: IDWriteFactory,
     target: Option<ID2D1HwndRenderTarget>,
-    brush: Option<ID2D1SolidColorBrush>,
+    brush: Option<ID2D1Brush>,
     stroke_style: ID2D1StrokeStyle,
     system_fonts: IDWriteFontCollection,
     text_format: IDWriteTextFormat
@@ -124,6 +108,10 @@ impl Renderer {
         }
     }
     
+    pub fn set_brush(&mut self, brush: Brush) {
+        self.brush = Some(brush.to_brush(self.target.as_ref().unwrap()))
+    }
+    
     pub fn size(&self) -> (f32, f32) {
         let size = unsafe {
             self.target.as_ref().unwrap().GetSize()
@@ -161,13 +149,8 @@ impl Renderer {
                     .unwrap()
             }; 
 
-            let brush = unsafe {
-                target.CreateSolidColorBrush(&DEFAULT_BRUSH_COLOR, &DEFAULT_BRUSH_PROPERTIES)
-                    .unwrap()
-            };
-
+            self.brush = Some(Brush::Solid(DEFAULT_BRUSH_COLOR).to_brush(&target));
             self.target = Some(target);
-            self.brush = Some(brush);
         }
     }
 }

src/window.rs

@@ -206,7 +206,7 @@ impl WindowBuilder {
             self.events,
             // todo: make this the application name
             self.always_on_top,
-            self.background.unwrap_or(Color::RGB(255.0, 255.0, 255.0)),
+            self.background.unwrap_or(Color::RGB(1.0, 1.0, 1.0)),
             self.decorations,
             self.maximized,
             self.resizable,