First check in of the o3d implimentation in webgl. Classes work well enough to run the hellocube sample.

Review URL: http://codereview.chromium.org/561026

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@40133 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 96 insertions, 0 deletions

diff --git a/o3d/samples/o3d-webgl/viewport.js b/o3d/samples/o3d-webgl/viewport.js
new file mode 100644
index 0000000..6c082c0
--- /dev/null
+++ b/o3d/samples/o3d-webgl/viewport.js
@@ -0,0 +1,96 @@
+/*
+ * Copyright 2010, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+/**
+ * A Viewport is a render node that sets the render viewport and depth range
+ * for its children.  It uses an array in the format [left, top, width, height]
+ * where left, top, width and height are in a 0.0 to 1.0 range that represent
+ * positions and dimensions relative to the size of the client's rendering
+ * area. The depth range is represented by an array in the format
+ * [min Z, max Z]. The depth range provides the mapping of the clip space
+ * coordinates into normalized z buffer coordinates.
+ * 
+ * @param {o3d.math.Float4} viewport The viewport setting.
+ * @param {o3d.math.Float2} depthRange ParamFloat2 The depth range setting.
+ * @constructor
+ */
+o3d.Viewport = function(opt_viewport, opt_depthRange) {
+  this.viewport = opt_viewport || [0.0, 0.0, 1.0, 1.0];
+  this.depthRange = opt_depthRange || [0.0, 1.0];
+};
+o3d.inherit('Viewport', 'RenderNode');
+
+
+/**
+ * The position and size to set the viewport in
+ * [left, top, width, height] format.
+ * 
+ * Note: These values must describe a rectangle that is 100% inside the client
+ * area. In other words, [0.5, 0.0, 1.0, 1.0] would describe an area that is
+ * 1/2 off right side of the screen. That is an invalid value and will be
+ * clipped to [0.5, 0.0, 0.5, 1.0].
+ * 
+ * Default = [0.0, 0.0, 1.0, 1.0]. In other words, the full area.
+ * 
+ * @type {!Array.<number>}
+ */
+o3d.Viewport.prototype.viewport = [0.0, 0.0, 1.0, 1.0];
+
+
+
+/**
+ * The min Z and max Z depth range in [min Z, max Z] format.
+ * Default = [0.0, 1.0].
+ * 
+ * @type {!Array.<number>}
+ */
+o3d.Viewport.prototype.depthRange = [0.0, 1.0];
+
+
+/**
+ * Called before the children are rendered.  Sets up a viewport and
+ * scissor region in gl.
+ */
+o3d.Viewport.prototype.before = function() {
+  var x = this.viewport[0] * this.gl.canvas.width;
+  var y = this.viewport[1] * this.gl.canvas.height;
+  var width = this.viewport[2] * this.gl.canvas.width;
+  var height = this.viewport[3] * this.gl.canvas.height;
+  this.gl.viewport(x, y, width, height);
+  if (x != 0 || y != 0 || this.viewport[2] != 1 || this.viewport[3] != 1) {
+    this.gl.enable(this.gl.SCISSOR_TEST);
+    this.gl.scissor(x, y, width, height);
+  } else {
+    
+  }
+};
+