2010-11-26 Helder Correia <helder@sencha.com>

        Reviewed by Kenneth Rohde Christiansen.

        New fast canvas test: createPattern + fillRect with shadow
        https://bugs.webkit.org/show_bug.cgi?id=50104

        Ensure that fillRect works correctly with an image pattern with
        transparency set as the fillStyle.

        * fast/canvas/canvas-createPattern-fillRect-shadow-expected.txt: Added.
        * fast/canvas/canvas-createPattern-fillRect-shadow.html: Added.
        * fast/canvas/script-tests/canvas-createPattern-fillRect-shadow.js: Added.

git-svn-id: svn://svn.chromium.org/blink/trunk@72756 bbb929c8-8fbe-4397-9dbb-9b2b20218538

1 files changed, 166 insertions, 0 deletions

diff --git a/third_party/WebKit/LayoutTests/fast/canvas/script-tests/canvas-createPattern-fillRect-shadow.js b/third_party/WebKit/LayoutTests/fast/canvas/script-tests/canvas-createPattern-fillRect-shadow.js
new file mode 100644
index 0000000..bb47648
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/fast/canvas/script-tests/canvas-createPattern-fillRect-shadow.js
@@ -0,0 +1,166 @@
+description("Ensure correct behavior of canvas with createPattern + fillRect with shadow.");
+
+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', '200');
+aCanvas.setAttribute('height', '200');
+var aCtx = aCanvas.getContext('2d');
+
+// Draw a circle on the same canvas.
+aCtx.beginPath();
+aCtx.fillStyle = 'blue';
+aCtx.arc(100, 100, 100, 0, Math.PI*2, false);
+aCtx.fill();
+
+// 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 enconded image as the source
+
+// Create master canvas.
+var canvas = document.createElement('canvas');
+document.body.appendChild(canvas);
+canvas.setAttribute('width', '700');
+canvas.setAttribute('height', '1100');
+var ctx = canvas.getContext('2d');
+
+function drawImageToCanvasAndCheckPixels() {
+    ctx.shadowOffsetX = 250;
+    ctx.fillStyle = ctx.createPattern(img, 'repeat');
+
+    ctx.shadowColor = 'rgba(255, 0, 0, 1.0)';
+    ctx.fillRect(50, 50, 200, 200);
+
+    ctx.shadowColor = 'rgba(255, 0, 0, 0.2)';
+    ctx.fillRect(50, 300, 200, 200);
+
+    ctx.shadowBlur = 10;
+    ctx.shadowColor = 'rgba(255, 0, 0, 1.0)';
+    ctx.fillRect(50, 550, 200, 200);
+
+    ctx.shadowColor = 'rgba(255, 0, 0, 0.2)';
+    ctx.fillRect(50, 800, 200, 200);
+
+    checkPixels();
+}
+
+function checkPixels() {
+    var imageData, data;
+
+    // Verify solid shadow.
+    imageData = ctx.getImageData(300, 50, 1, 1);
+    d = imageData.data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBe('d[3]', '255');
+
+    imageData = ctx.getImageData(300, 249, 1, 1);
+    d = imageData.data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBe('d[3]', '255');
+
+    imageData = ctx.getImageData(490, 240, 1, 1);
+    d = imageData.data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBe('d[3]', '255');
+
+    // Verify solid alpha shadow.
+    imageData = ctx.getImageData(310, 350, 1, 1);
+    d = imageData.data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '51');
+
+    imageData = ctx.getImageData(490, 490, 1, 1);
+    d = imageData.data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '51');
+
+    imageData = ctx.getImageData(300, 499, 1, 1);
+    d = imageData.data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '51');
+
+    // Verify blurry shadow.
+    imageData = ctx.getImageData(310, 550, 1, 1);
+    d = imageData.data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '141');
+
+    imageData = ctx.getImageData(490, 750, 1, 1);
+    d = imageData.data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '113');
+
+    imageData = ctx.getImageData(499, 499, 1, 1);
+    d = imageData.data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '51');
+
+    // Verify blurry alpha shadow.
+    imageData = ctx.getImageData(300, 850, 1, 1);
+    d = imageData.data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '29');
+
+    imageData = ctx.getImageData(500, 875, 1, 1);
+    d = imageData.data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '23');
+
+    imageData = ctx.getImageData(300, 900, 1, 1);
+    d = imageData.data;
+    shouldBe('d[0]', '255');
+    shouldBe('d[1]', '0');
+    shouldBe('d[2]', '0');
+    shouldBeAround('d[3]', '29');
+}
+
+var successfullyParsed = true;