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Cleaned up code for tiling

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sbarman 2011-06-17 17:35:56 -07:00
parent 4a5e1329c2
commit 4593fb3949
1 changed files with 26 additions and 44 deletions
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pdf.js
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@ -1609,38 +1609,8 @@ var CanvasExtraState = (function() {
// Start of text line (in text coordinates)
this.lineX = 0.0;
this.lineY = 0.0;
this.transMatrix = IDENTITY_MATRIX;
}
constructor.prototype = {
applyTransform: function(point) {
var m = this.transMatrix
var x = point[0] * m[0] + point[1] * m[2] + m[4];
var y = point[0] * m[1] + point[1] * m[3] + m[5];
return [x,y];
},
concatTransform: function(m) {
var tm = this.transMatrix;
var a = m[0] * tm[0] + m[1] * tm[2];
var b = m[0] * tm[1] + m[1] * tm[3];
var c = m[2] * tm[0] + m[3] * tm[2];
var d = m[2] * tm[1] + m[3] * tm[3];
var e = m[4] * tm[0] + m[5] * tm[2] + tm[4];
var f = m[4] * tm[1] + m[5] * tm[3] + tm[5];
this.transMatrix = [a, b, c, d, e, f]
},
getInvTransform: function(matrix) {
var m = this.transMatrix;
var det = 1 / (m[0] * m[3] - m[1] * m[2]);
var a = m[3] * det;
var b = -m[1] * det;
var c = -m[2] * det;
var d = m[0] * det;
var e = (m[2] * m[5] - m[3] * m[4]) * det;
var f = (m[1] * m[4] - m[0] * m[5]) * det;
return [a, b, c, d, e, f]
}
};
return constructor;
})();
@ -1942,7 +1912,6 @@ var CanvasGraphics = (function() {
},
transform: function(a, b, c, d, e, f) {
this.ctx.transform(a, b, c, d, e, f);
this.current.concatTransform([a,b,c,d,e,f]);
},
// Path
@ -2181,6 +2150,22 @@ var CanvasGraphics = (function() {
}
},
tilingFill: function(pattern) {
function applyMatrix(point, m) {
var x = point[0] * m[0] + point[1] * m[2] + m[4];
var y = point[0] * m[1] + point[1] * m[3] + m[5];
return [x,y];
};
function multiply(m, tm) {
var a = m[0] * tm[0] + m[1] * tm[2];
var b = m[0] * tm[1] + m[1] * tm[3];
var c = m[2] * tm[0] + m[3] * tm[2];
var d = m[2] * tm[1] + m[3] * tm[3];
var e = m[4] * tm[0] + m[5] * tm[2] + tm[4];
var f = m[4] * tm[1] + m[5] * tm[3] + tm[5];
return [a, b, c, d, e, f]
};
this.save();
var dict = pattern.dict;
@ -2196,10 +2181,9 @@ var CanvasGraphics = (function() {
// not sure what to do with this
var tilingType = dict.get("TilingType");
var tempExtra = new CanvasExtraState();
var matrix = dict.get("Matrix");
if (matrix && IsArray(matrix) && 6 == matrix.length)
tempExtra.transMatrix = matrix;
if (!matrix)
matrix = [1, 0, 0, 1, 0, 0];
var bbox = dict.get("BBox");
var x0 = bbox[0], y0 = bbox[1], x1 = bbox[2], y1 = bbox[3];
@ -2208,9 +2192,9 @@ var CanvasGraphics = (function() {
var ystep = dict.get("YStep");
// top left corner should correspond to the top left of the bbox
var topLeft = tempExtra.applyTransform([x0,y0]);
var topLeft = applyMatrix([x0,y0], matrix);
// we want the canvas to be as large as the step size
var botRight = tempExtra.applyTransform([x0 + xstep, y0 + ystep]);
var botRight = applyMatrix([x0 + xstep, y0 + ystep], matrix);
var tmpCanvas = document.createElement("canvas");
tmpCanvas.width = Math.ceil(botRight[0] - topLeft[0]);
@ -2221,19 +2205,16 @@ var CanvasGraphics = (function() {
var oldCtx = this.ctx;
this.ctx = tmpCtx;
// normalize matrix transform so each step
// takes up the entire tmpCanvas
// normalize transform matrix so each step
// takes up the entire tmpCanvas (no white borders)
if (matrix[1] === 0 && matrix[2] === 0) {
matrix[0] = tmpCanvas.width / xstep;
matrix[3] = tmpCanvas.height / ystep;
tempExtra.transMatrix = matrix;
topLeft = tempExtra.applyTransform([x0,y0]);
topLeft = applyMatrix([x0,y0], matrix);
}
// move the top left corner of bounding box to [0,0]
tempExtra.transMatrix = [1, 0, 0, 1, -topLeft[0], -topLeft[1]];
tempExtra.concatTransform(matrix);
matrix = tempExtra.transMatrix;
matrix = multiply(matrix, [1, 0, 0, 1, -topLeft[0], -topLeft[1]]);
this.transform.apply(this, matrix);
@ -2253,6 +2234,7 @@ var CanvasGraphics = (function() {
this.ctx = oldCtx;
this.restore();
warn("Inverse pattern is painted");
var pattern = this.ctx.createPattern(tmpCanvas, "repeat");
this.ctx.fillStyle = pattern;
},