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Add PatternProxy; makes page 13 work

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This commit is contained in:
Julian Viereck 2011-06-22 21:17:32 +02:00
parent 897ac256fc
commit 34e79aca08
3 changed files with 53 additions and 20 deletions
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26
canvas_proxy.js
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@ -61,6 +61,20 @@ function GradientProxy(stack, x0, y0, x1, y1) {
}
}
var patternProxyCounter = 0;
function PatternProxy(stack, object, kind) {
this.id = patternProxyCounter++;
if (!(object instanceof CanvasProxy) ) {
throw "unkown type to createPattern";
}
// Flush the object here to ensure it's available on the main thread.
// TODO: Make some kind of dependency management, such that the object
// gets flushed only if needed.
object.flush();
stack.push(["$createPatternFromCanvas", [this.id, object.id, kind]]);
}
var canvasProxyCounter = 0;
function CanvasProxy(width, height) {
this.id = canvasProxyCounter++;
@ -76,10 +90,6 @@ function CanvasProxy(width, height) {
return ctx;
}
this.getCanvas = function() {
return this;
}
// Expose only the minimum of the canvas object - there is no dom to do
// more here.
this.width = width;
@ -105,7 +115,7 @@ function CanvasProxy(width, height) {
"transform",
"setTransform",
// "createLinearGradient",
"createPattern",
// "createPattern",
"clearRect",
"fillRect",
"strokeRect",
@ -129,6 +139,10 @@ function CanvasProxy(width, height) {
"$showText"
];
ctx.createPattern = function(object, kind) {
return new PatternProxy(stack, object, kind);
}
ctx.createLinearGradient = function(x0, y0, x1, y1) {
return new GradientProxy(stack, x0, y0, x1, y1);
}
@ -219,6 +233,8 @@ function CanvasProxy(width, height) {
return function(value) {
if (value instanceof GradientProxy) {
stack.push(["$" + name + "Gradient"]);
} else if (value instanceof PatternProxy) {
stack.push(["$" + name + "Pattern", [value.id]]);
} else {
stack.push(["$", name, value]);
return ctx["$" + name] = value;