[gjs/cairo: 4/12] [cairo] Add examples

[Johan Dahlin <johan src gnome org>]

commit e615aa99c5f4c20ae178a3b7ad6159bcb9b0ce2e
Author: Johan Dahlin <johan gnome org>
Date:   Sun Feb 21 16:00:11 2010 -0300

    [cairo] Add examples

 Makefile-examples.am            |    4 ++++
 examples/cairo/fill.js          |   11 +++++++++++
 examples/cairo/paint.js         |   10 ++++++++++
 examples/cairo/poppler-gdk.js   |   32 ++++++++++++++++++++++++++++++++
 examples/cairo/setsourcergba.js |   28 ++++++++++++++++++++++++++++
 examples/cairo/showtext.js      |   17 +++++++++++++++++
 examples/cairo/stroke.js        |   13 +++++++++++++
 7 files changed, 115 insertions(+), 0 deletions(-)
---
diff --git a/Makefile-examples.am b/Makefile-examples.am
index 70d59a0..e8d045d 100644
--- a/Makefile-examples.am
+++ b/Makefile-examples.am
@@ -1,4 +1,8 @@
 EXTRA_DIST +=			        \
+	examples/cairo/fill.js                 \
+	examples/cairo/poppler-gdk.js                 \
+	examples/cairo/setsourcergba.js                 \
+	examples/cairo/stroke.js                 \
 	examples/clutter.js		\
 	examples/gio-cat.js                 \
 	examples/gtk.js                 \
diff --git a/examples/cairo/fill.js b/examples/cairo/fill.js
new file mode 100644
index 0000000..cc2a036
--- /dev/null
+++ b/examples/cairo/fill.js
@@ -0,0 +1,11 @@
+const Cairo = imports.cairo;
+
+let surface = new Cairo.ImageSurface(Cairo.Format.ARGB32, 120, 120);
+let cr = new Cairo.Context(surface);
+cr.scale(120, 120);
+
+cr.setSourceRGB(0, 0, 0);
+cr.rectangle(0.25, 0.25, 0.5, 0.5);
+cr.fill();
+
+surface.writeToPNG("fill.png");
diff --git a/examples/cairo/paint.js b/examples/cairo/paint.js
new file mode 100644
index 0000000..4c53280
--- /dev/null
+++ b/examples/cairo/paint.js
@@ -0,0 +1,10 @@
+const Cairo = imports.cairo;
+
+let surface = new Cairo.ImageSurface(Cairo.Format.ARGB32, 120, 120);
+let cr = new Cairo.Context(surface);
+cr.scale(120, 120);
+
+cr.setSourceRGB(0.0, 0.0, 0.0);
+cr.paintWithAlpha(0.5);
+
+surface.writeToPNG("paint.png");
diff --git a/examples/cairo/poppler-gdk.js b/examples/cairo/poppler-gdk.js
new file mode 100644
index 0000000..1463e68
--- /dev/null
+++ b/examples/cairo/poppler-gdk.js
@@ -0,0 +1,32 @@
+const Gdk = imports.gi.Gdk;
+const Gtk = imports.gi.Gtk;
+const Poppler = imports.gi.Poppler;
+const Cairo = imports.cairo;
+
+function onExpose(window, event) {
+  var cr = Gdk.cairo_create(window.window);
+  page.render(cr);
+}
+
+function onDestroy() {
+  Gtk.main_quit();
+}
+
+Gtk.init(0, null);
+
+var doc = Poppler.Document.new_from_file("file://" + ARGV[0], "");
+var page = doc.get_page(0); 
+
+var win = new Gtk.Window({
+  'type': Gtk.WindowType.TOPLEVEL
+});
+
+var draw = new Gtk.DrawingArea();
+win.add(draw);
+
+win.connect("destroy", onDestroy);
+draw.connect("expose-event", onExpose);
+
+win.show_all();
+
+Gtk.main();
diff --git a/examples/cairo/setsourcergba.js b/examples/cairo/setsourcergba.js
new file mode 100644
index 0000000..99a064d
--- /dev/null
+++ b/examples/cairo/setsourcergba.js
@@ -0,0 +1,28 @@
+const Cairo = imports.cairo;
+
+let surface = new Cairo.ImageSurface(Cairo.Format.ARGB32, 120, 120);
+let cr = new Cairo.Context(surface);
+cr.scale(120, 120);
+
+cr.setSourceRGB(0, 0, 0);
+cr.moveTo(0, 0);
+cr.lineTo(1, 1);
+cr.moveTo(1, 0);
+cr.lineTo(0, 1);
+cr.setLineWidth(0.2);
+cr.stroke();
+
+cr.rectangle(0, 0, 0.5, 0.5);
+cr.setSourceRGBA(1, 0, 0, 0.80);
+cr.fill();
+
+cr.rectangle(0, 0.5, 0.5, 0.5);
+cr.setSourceRGBA(0, 1, 0, 0.60);
+cr.fill();
+
+cr.rectangle(0.5, 0, 0.5, 0.5);
+cr.setSourceRGBA(0, 0, 1, 0.40);
+cr.fill();
+
+surface.writeToPNG("setsourcergba.png");
+
diff --git a/examples/cairo/showtext.js b/examples/cairo/showtext.js
new file mode 100644
index 0000000..6fb364c
--- /dev/null
+++ b/examples/cairo/showtext.js
@@ -0,0 +1,17 @@
+const Cairo = imports.cairo;
+
+let surface = new Cairo.ImageSurface(Cairo.Format.ARGB32, 120, 120);
+let cr = new Cairo.Context(surface);
+cr.scale(120, 120);
+
+cr.setSourceRGB(0, 0, 0);
+cr.selectFontFace("Georgia", Cairo.FontSlant.NORMAL, Cairo.FontWeight.BOLD);
+cr.setFontSize(1.2);
+
+//let te = cr.text_extents("a");
+//cr.moveTo(0.5 - te.width / 2 - te.xBearing,
+//          0.5 - te.height / 2 - te.yBearing);
+cr.showText("a");
+
+surface.writeToPNG("showtext.png");
+
diff --git a/examples/cairo/stroke.js b/examples/cairo/stroke.js
new file mode 100644
index 0000000..821d55a
--- /dev/null
+++ b/examples/cairo/stroke.js
@@ -0,0 +1,13 @@
+const Cairo = imports.cairo;
+
+let surface = new Cairo.ImageSurface(Cairo.Format.ARGB32, 120, 120);
+let cr = new Cairo.Context(surface);
+cr.scale(120, 120);
+
+cr.setLineWidth(0.1);
+cr.setSourceRGB(0, 0, 0);
+cr.rectangle(0.25, 0.25, 0.5, 0.5);
+cr.stroke();
+
+surface.writeToPNG("stroke.png");
+