Add cairo_interaction

Gir.toml

@@ -108,6 +108,10 @@ status = "generate"
         name = "surface"
         const = true
     [[object.function]]
+    pattern = "cairo_.+"
+    #manual trait
+    ignore = true
+    [[object.function]]
     name = "pango_layout_get_clip_region"
     #manual
     ignore = true

src/cairo_interaction.rs

@@ -0,0 +1,133 @@
+// Copyright 2013-2019, The Gtk-rs Project Developers.
+// See the COPYRIGHT file at the top-level directory of this distribution.
+// Licensed under the MIT license, see the LICENSE file or <http://opensource.org/licenses/MIT>
+
+use cairo::{Context, Region};
+use gdk_pixbuf::Pixbuf;
+use gdk_sys;
+use glib::translate::*;
+use {GLContext, Rectangle, Surface, RGBA};
+
+pub trait SurfaceExt {
+    fn create_region(&self) -> Option<Region>;
+    fn upload_to_gl(&self, target: i32, width: i32, height: i32, context: Option<&GLContext>);
+}
+
+impl SurfaceExt for cairo::Surface {
+    fn create_region(&self) -> Option<Region> {
+        unsafe {
+            from_glib_full(gdk_sys::gdk_cairo_region_create_from_surface(
+                self.to_glib_none().0,
+            ))
+        }
+    }
+
+    fn upload_to_gl(&self, target: i32, width: i32, height: i32, context: Option<&GLContext>) {
+        assert_initialized_main_thread!();
+        unsafe {
+            gdk_sys::gdk_cairo_surface_upload_to_gl(
+                mut_override(self.to_glib_none().0),
+                target,
+                width,
+                height,
+                context.to_glib_none().0,
+            );
+        }
+    }
+}
+
+pub trait ContextExt {
+    fn draw_from_gl(
+        &self,
+        surface: &Surface,
+        source: i32,
+        source_type: i32,
+        buffer_scale: i32,
+        x: i32,
+        y: i32,
+        width: i32,
+        height: i32,
+    );
+
+    fn get_clip_rectangle(&self) -> Option<Rectangle>;
+
+    fn set_source_rgba(&self, rgba: &RGBA);
+
+    fn set_source_pixbuf(&self, pixbuf: &Pixbuf, x: f64, y: f64);
+
+    fn rectangle(&self, rectangle: &Rectangle);
+
+    fn add_region(&self, region: &Region);
+}
+
+impl ContextExt for Context {
+    fn draw_from_gl(
+        &self,
+        surface: &Surface,
+        source: i32,
+        source_type: i32,
+        buffer_scale: i32,
+        x: i32,
+        y: i32,
+        width: i32,
+        height: i32,
+    ) {
+        skip_assert_initialized!();
+        unsafe {
+            gdk_sys::gdk_cairo_draw_from_gl(
+                mut_override(self.to_glib_none().0),
+                surface.to_glib_none().0,
+                source,
+                source_type,
+                buffer_scale,
+                x,
+                y,
+                width,
+                height,
+            );
+        }
+    }
+
+    fn get_clip_rectangle(&self) -> Option<Rectangle> {
+        unsafe {
+            let mut rectangle = Rectangle::uninitialized();
+            if from_glib(gdk_sys::gdk_cairo_get_clip_rectangle(
+                self.to_glib_none().0,
+                rectangle.to_glib_none_mut().0,
+            )) {
+                Some(rectangle)
+            } else {
+                None
+            }
+        }
+    }
+
+    fn set_source_rgba(&self, rgba: &RGBA) {
+        unsafe {
+            gdk_sys::gdk_cairo_set_source_rgba(self.to_glib_none().0, rgba.to_glib_none().0);
+        }
+    }
+
+    fn set_source_pixbuf(&self, pixbuf: &Pixbuf, x: f64, y: f64) {
+        unsafe {
+            gdk_sys::gdk_cairo_set_source_pixbuf(
+                self.to_glib_none().0,
+                pixbuf.to_glib_none().0,
+                x,
+                y,
+            );
+        }
+    }
+
+    fn rectangle(&self, rectangle: &Rectangle) {
+        unsafe {
+            gdk_sys::gdk_cairo_rectangle(self.to_glib_none().0, rectangle.to_glib_none().0);
+        }
+    }
+
+    fn add_region(&self, region: &Region) {
+        unsafe {
+            gdk_sys::gdk_cairo_region(self.to_glib_none().0, region.to_glib_none().0);
+        }
+    }
+}

src/lib.rs

@@ -44,6 +44,7 @@ mod auto;
 mod alias;
 pub mod prelude;
 
+mod cairo_interaction;
 mod clipboard;
 mod content_deserializer;
 mod draw_context;

src/prelude.rs

@@ -6,4 +6,5 @@
 
 pub use auto::traits::*;
 
+pub use cairo_interaction::{ContextExt, SurfaceExt};
 pub use draw_context::DrawContextExtManual;