ZenBrowserMirrors/pdf.js
1
0
Fork 0
mirror of https://github.com/zen-browser/pdf.js.git synced 2025-07-10 10:15:37 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

Removing the rotatePoint, width, height from the API

Browse source
This commit is contained in:
Yury Delendik 2012-04-11 08:29:44 -07:00
parent 737ed84174
commit 47c43b5779
5 changed files with 160 additions and 149 deletions
Download patch file Download diff file Expand all files Collapse all files

88
src/util.js
View file

@ -97,6 +97,19 @@ var Util = (function UtilClosure() {
return [xt, yt];
};
Util.applyInverseTransform = function Util_applyTransform(p, m) {
var d = m[0] * m[3] - m[1] * m[2];
var xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d;
var yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d;
return [xt, yt];
};
Util.inverseTransform = function Util_inverseTransform(m) {
var d = m[0] * m[3] - m[1] * m[2];
return [m[3] / d, -m[1] / d, -m[2] / d, m[0] / d,
(m[2] * m[5] - m[4] * m[3]) / d, (m[4] * m[1] - m[5] * m[0]) / d];
};
// Apply a generic 3d matrix M on a 3-vector v:
// | a b c | | X |
// | d e f | x | Y |
@ -165,7 +178,7 @@ var Util = (function UtilClosure() {
}
return result;
}
};
Util.sign = function Util_sign(num) {
return num < 0 ? -1 : 1;
@ -174,6 +187,79 @@ var Util = (function UtilClosure() {
return Util;
})();
var PageViewport = PDFJS.PageViewport = (function PageViewportClosure() {
function PageViewport(viewBox, scale, rotate, offsetX, offsetY) {
// creating transform to convert pdf coordinate system to the normal
// canvas like coordinates taking in account scale and rotation
var centerX = (viewBox[2] + viewBox[0]) / 2;
var centerY = (viewBox[3] + viewBox[1]) / 2;
var rotateA, rotateB, rotateC, rotateD;
switch (rotate) {
case -180:
case 180:
rotateA = -1; rotateB = 0; rotateC = 0; rotateD = 1;
break;
case -270:
case 90:
rotateA = 0; rotateB = 1; rotateC = 1; rotateD = 0;
break;
case -90:
case 270:
rotateA = 0; rotateB = -1; rotateC = -1; rotateD = 0;
break;
case 360:
case 0:
default:
rotateA = 1; rotateB = 0; rotateC = 0; rotateD = -1;
break;
}
var offsetCanvasX, offsetCanvasY;
var width, height;
if (rotateA == 0) {
offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX;
offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY;
width = Math.abs(viewBox[3] - viewBox[1]) * scale;
height = Math.abs(viewBox[2] - viewBox[0]) * scale;
} else {
offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX;
offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY;
width = Math.abs(viewBox[2] - viewBox[0]) * scale;
height = Math.abs(viewBox[3] - viewBox[1]) * scale;
}
// creating transform for the following operations:
// translate(-centerX, -centerY), rotate and flip vertically,
// scale, and translate(offsetCanvasX, offsetCanvasY)
this.transform = [
rotateA * scale,
rotateB * scale,
rotateC * scale,
rotateD * scale,
offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY,
offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY
];
this.offsetX = offsetX;
this.offsetY = offsetY;
this.width = width;
this.height = height;
}
PageViewport.prototype = {
convertPointToViewport: function PageViewport_convertPointToViewport(x, y) {
return Util.applyTransform([x, y], this.transform);
},
convertRectangleToViewport:
function PageViewport_convertRectangeToViewport(rect) {
var tl = Util.applyTransform([rect[0], rect[1]], this.transform);
var br = Util.applyTransform([rect[2], rect[3]], this.transform);
return [tl[0], tl[1], br[0], br[1]];
},
convertViewportToPoint: function PageViewport_convertViewportToPoint(x, y) {
return Util.applyInverseTransform([x, y], this.transform);
}
};
return PageViewport;
})();
var PDFStringTranslateTable = [
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0x2D8, 0x2C7, 0x2C6, 0x2D9, 0x2DD, 0x2DB, 0x2DA, 0x2DC, 0, 0, 0, 0, 0, 0, 0,