1 files changed, 57 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/js/tests/offscreencanvas-transfer-image-bitmap.js b/dom/canvas/test/webgl-conf/checkout/js/tests/offscreencanvas-transfer-image-bitmap.js
new file mode 100644
index 0000000000..b25a7dd026
--- /dev/null
+++ b/dom/canvas/test/webgl-conf/checkout/js/tests/offscreencanvas-transfer-image-bitmap.js
@@ -0,0 +1,57 @@
+function testTransferToImageBitmap(webglContextVersion, bitmap) {
+    var internalFormat = "RGBA";
+    var pixelFormat = "RGBA";
+    var pixelType = "UNSIGNED_BYTE";
+
+    var width = 32;
+    var height = 32;
+    var canvas = document.createElement("canvas");
+    canvas.width = width;
+    canvas.height = height;
+    var gl = WebGLTestUtils.create3DContext(canvas);
+    gl.clearColor(0,0,0,1);
+    gl.clearDepth(1);
+    gl.disable(gl.BLEND);
+
+    TexImageUtils.setupTexturedQuad(gl, internalFormat);
+
+    gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
+    // Enable writes to the RGBA channels
+    gl.colorMask(1, 1, 1, 0);
+    var texture = gl.createTexture();
+    // Bind the texture to texture unit 0
+    gl.bindTexture(gl.TEXTURE_2D, texture);
+    // Set up texture parameters
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+
+    var targets = [gl.TEXTURE_2D];
+    // Upload the image into the texture
+    for (var tt = 0; tt < targets.length; ++tt) {
+        gl.texImage2D(targets[tt], 0, gl[internalFormat], gl[pixelFormat], gl[pixelType], bitmap);
+    }
+    for (var tt = 0; tt < targets.length; ++tt) {
+        // Draw the triangles
+        gl.clearColor(0, 0, 0, 1);
+        gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
+        gl.drawArrays(gl.TRIANGLES, 0, 6);
+
+        var buf = new Uint8Array(width * height * 4);
+        gl.readPixels(0, 0, width, height, gl.RGBA, gl.UNSIGNED_BYTE, buf);
+        _checkCanvas(buf, width, height, webglContextVersion);
+    }
+}
+
+function _checkCanvas(buf, width, height, webglContextVersion)
+{
+    for (var i = 0; i < width * height; i++) {
+        if (buf[i * 4] != 255 || buf[i * 4 + 1] != 255 ||
+            buf[i * 4 + 2] != 0 || buf[i * 4 + 3] != 255) {
+            testFailed("OffscreenCanvas." + webglContextVersion +
+                ": This pixel should be [255, 255, 0, 255], but it is: [" + buf[i * 4] + ", " +
+                buf[i * 4 + 1] + ", " + buf[i * 4 + 2] + ", " + buf[i * 4 + 3] + "].");
+            return;
+        }
+    }
+    testPassed("TransferToImageBitmap test on OffscreenCanvas." + webglContextVersion + " passed");
+}