1 files changed, 155 insertions, 0 deletions
diff --git a/third_party/WebKit/LayoutTests/fast/canvas/script-tests/canvas-scale-drawImage-shadow.js b/third_party/WebKit/LayoutTests/fast/canvas/script-tests/canvas-scale-drawImage-shadow.js
new file mode 100644
index 0000000..a5c5e77
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/fast/canvas/script-tests/canvas-scale-drawImage-shadow.js
@@ -0,0 +1,155 @@
+description("Ensure correct behavior of canvas with drawImage+shadow after scaling. A blue and red checkered pattern should be displayed.");
+
+function print(message, color)
+{
+    var paragraph = document.createElement("div");
+    paragraph.appendChild(document.createTextNode(message));
+    paragraph.style.fontFamily = "monospace";
+    if (color)
+        paragraph.style.color = color;
+    document.getElementById("console").appendChild(paragraph);
+}
+
+function shouldBeAround(a, b)
+{
+    var evalA;
+    try {
+        evalA = eval(a);
+    } catch(e) {
+        evalA = e;
+    }
+
+    if (Math.abs(evalA - b) < 10)
+        print("PASS " + a + " is around " + b , "green")
+    else
+        print("FAIL " + a + " is not around " + b + " (actual: " + evalA + ")", "red");
+}
+
+// Create auxiliary canvas to draw to and create an image from.
+// This is done instead of simply loading an image from the file system
+// because that would throw a SECURITY_ERR DOM Exception.
+var aCanvas = document.createElement('canvas');
+aCanvas.setAttribute('width', '50');
+aCanvas.setAttribute('height', '50');
+var aCtx = aCanvas.getContext('2d');
+
+// Fill the same canvas.
+aCtx.fillStyle = 'rgba(0, 0, 255, 1)';
+aCtx.fillRect(0, 0, 50, 50);
+
+// Create the image object to be drawn on the master canvas.
+var img = new Image();
+img.onload = drawImageToCanvasAndCheckPixels;
+img.src = aCanvas.toDataURL(); // set a data URI of the base64 encoded image as the source
+
+// Create master canvas.
+var canvas = document.createElement('canvas');
+document.body.appendChild(canvas);
+canvas.setAttribute('width', '1000');
+canvas.setAttribute('height', '1000');
+var ctx = canvas.getContext('2d');
+
+function drawImageToCanvasAndCheckPixels() {
+    ctx.scale(2, 2);
+    ctx.shadowOffsetX = 100;
+    ctx.shadowOffsetY = 100;
+    ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+
+    ctx.shadowColor = 'rgba(255, 0, 0, 1.0)';
+    ctx.drawImage(img, 50, 50);
+
+    ctx.shadowColor = 'rgba(255, 0, 0, 0.3)';
+    ctx.drawImage(img, 50, 150);
+
+    ctx.shadowColor = 'rgba(255, 0, 0, 1.0)';
+    ctx.shadowBlur = 10;
+    ctx.drawImage(img, 150, 50);
+
+    ctx.shadowColor = 'rgba(255, 0, 0, 0.3)';
+    ctx.drawImage(img, 150, 150);
+
+    checkPixels();
+}
+
+var d; // imageData.data
+
+function checkPixels() {
+
+    // Verify solid shadow.
+    d = ctx.getImageData(205, 205, 1, 1).data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBe('d[3]', '255');
+
+    d = ctx.getImageData(295, 295, 1, 1).data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBe('d[3]', '255');
+
+    d = ctx.getImageData(205, 295, 1, 1).data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBe('d[3]', '255');
+
+    // Verify solid alpha shadow.
+    d = ctx.getImageData(201, 401, 1, 1).data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '76');
+
+    d = ctx.getImageData(290, 401, 1, 1).data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '76');
+
+    d = ctx.getImageData(290, 498, 1, 1).data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '76');
+
+    // Verify blurry shadow.
+    d = ctx.getImageData(398, 205, 1, 1).data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '83');
+
+    d = ctx.getImageData(501, 205, 1, 1).data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '83');
+
+    d = ctx.getImageData(500, 300, 1, 1).data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '53');
+
+    // Verify blurry alpha shadow.
+    d = ctx.getImageData(398, 405, 1, 1).data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '24');
+
+    d = ctx.getImageData(405, 501, 1, 1).data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '24');
+
+    d = ctx.getImageData(405, 501, 1, 1).data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '24');
+}
+
+var successfullyParsed = true;