[Pkg-javascript-commits] [pdf.js] 71/139: removed rounding of values in composeSMaskLuminosity

[David Prévot]

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taffit pushed a commit to branch master
in repository pdf.js.

commit b049119d149f4c30a09a7d825140547cb2c5650c
Author: Fabian Lange <lange.fabian at gmail.com>
Date:   Tue Dec 2 22:13:03 2014 +0100

    removed rounding of values in composeSMaskLuminosity
    
    maskData comes out of maskCtx.getImageData, so is 0..255 clamped, and
    the used multiplications will not create fractions needing rounding,
    neither would addition.
---
 src/display/canvas.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/display/canvas.js b/src/display/canvas.js
index 688f643..c57ef32 100644
--- a/src/display/canvas.js
+++ b/src/display/canvas.js
@@ -639,9 +639,9 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
   function composeSMaskLuminosity(maskData, layerData) {
     var length = maskData.length;
     for (var i = 3; i < length; i += 4) {
-      var y = ((maskData[i - 3] * 77) +     // * 0.3 / 255 * 0x10000
-               (maskData[i - 2] * 152) +    // * 0.59 ....
-               (maskData[i - 1] * 28)) | 0; // * 0.11 ....
+      var y = (maskData[i - 3] * 77) +  // * 0.3 / 255 * 0x10000
+              (maskData[i - 2] * 152) + // * 0.59 ....
+              (maskData[i - 1] * 28);   // * 0.11 ....
       layerData[i] = (layerData[i] * y) >> 16;
     }
   }

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