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Make instructions responsible for incrementing the instruction index

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This paves the way for skipping features (where both the instruction and
data indexes will need to be advanced).
This commit is contained in:
Tom Payne
2013-11-12 22:40:57 +01:00
parent 19758b6268
commit f9282c90e4
1 changed files with 12 additions and 1 deletions
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13
src/ol/render/canvas/canvasreplay.js
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@@ -102,13 +102,15 @@ ol.render.canvas.Replay.prototype.draw = function(context, transform) {
var ii = instructions.length; // end of instructions
var d = 0; // data index
var dd; // end of per-instruction data
for (; i < ii; ++i) {
while (i < ii) {
var instruction = instructions[i];
var type = /** @type {ol.render.canvas.Instruction} */ (instruction[0]);
if (type == ol.render.canvas.Instruction.BEGIN_PATH) {
context.beginPath();
++i;
} else if (type == ol.render.canvas.Instruction.CLOSE_PATH) {
context.closePath();
++i;
} else if (type == ol.render.canvas.Instruction.DRAW_IMAGE) {
dd = /** @type {number} */ (instruction[1]);
var imageStyle = /** @type {ol.style.Image} */ (instruction[2]);
@@ -121,8 +123,10 @@ ol.render.canvas.Replay.prototype.draw = function(context, transform) {
}
context.drawImage(imageStyle.image, x, y);
}
++i;
} else if (type == ol.render.canvas.Instruction.FILL) {
context.fill();
++i;
} else if (type == ol.render.canvas.Instruction.MOVE_TO_LINE_TO) {
context.moveTo(pixelCoordinates[d], pixelCoordinates[d + 1]);
goog.asserts.assert(goog.isNumber(instruction[1]));
@@ -130,17 +134,24 @@ ol.render.canvas.Replay.prototype.draw = function(context, transform) {
for (d += 2; d < dd; d += 2) {
context.lineTo(pixelCoordinates[d], pixelCoordinates[d + 1]);
}
++i;
} else if (type == ol.render.canvas.Instruction.SET_FILL_STYLE) {
goog.asserts.assert(goog.isObject(instruction[1]));
var fillStyle = /** @type {ol.style.Fill} */ (instruction[1]);
context.fillStyle = fillStyle.color;
++i;
} else if (type == ol.render.canvas.Instruction.SET_STROKE_STYLE) {
goog.asserts.assert(goog.isObject(instruction[1]));
var strokeStyle = /** @type {ol.style.Stroke} */ (instruction[1]);
context.strokeStyle = strokeStyle.color;
context.lineWidth = strokeStyle.width;
++i;
} else if (type == ol.render.canvas.Instruction.STROKE) {
context.stroke();
++i;
} else {
goog.asserts.fail();
++i; // consume the instruction anyway, to avoid an infite loop
}
}
// assert that all data were consumed