ZenBrowserMirrors/pdf.js
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Second stage, smasks now working. Still needs optimization.

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This commit is contained in:
Brendan Dahl 2011-12-08 12:50:34 -08:00
parent 2a632d4ab2
commit 146cd8c861
4 changed files with 88 additions and 101 deletions
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69
src/evaluator.js
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@ -183,38 +183,42 @@ var PartialEvaluator = (function partialEvaluator() {
var dict = image.dict;
var w = dict.get('Width', 'W');
var h = dict.get('Height', 'H');
fn = 'paintImageXObject';
if (image instanceof JpegStream && image.isNative) {
var objId = 'img_' + uniquePrefix + (++self.objIdCounter);
debugger;
handler.send('jpeg_decode', [image.getIR()], function(data) {
handler.send('obj', [objId, 'Jpeg', data]);
});
var imageMask = dict.get('ImageMask', 'IM') || false;
if (imageMask) {
// This depends on a tmpCanvas beeing filled with the
// current fillStyle, such that processing the pixel
// data can't be done here. Instead of creating a
// complete PDFImage, only read the information needed
// for later.
// Add the dependency on the image object.
insertDependency([objId]);
// The normal fn.
args = ['jpeg', [objId, w, h]];
var width = dict.get('Width', 'W');
var height = dict.get('Height', 'H');
var bitStrideLength = (width + 7) >> 3;
var imgArray = image.getBytes(bitStrideLength * height);
var decode = dict.get('Decode', 'D');
var inverseDecode = !!decode && decode[0] > 0;
fn = 'paintImageMaskXObject';
args = [imgArray, inverseDecode, width, height];
return;
}
// Needs to be rendered ourself.
// Figure out if the image has an imageMask.
var imageMask = dict.get('ImageMask', 'IM') || false;
// If there is no imageMask, create the PDFImage and a lot
// of image processing can be done here.
if (!imageMask) {
var imageObj = new PDFImage(xref, resources, image, inline);
var objId = 'img_' + uniquePrefix + (++self.objIdCounter);
insertDependency([objId]);
fn = 'paintImageXObject';
args = [objId, w, h];
var resolve = (function(objId) {
return function resolve(data) {
handler.send('obj', [objId, 'Image', data]);
};
})(objId);
if (imageObj.imageMask) {
throw 'Can\'t handle this in the web worker :/';
}
var imageObj = new PDFImage(xref, resources, image, inline, handler);
imageObj.ready(function() {
var imgData = {
width: w,
height: h,
@ -222,25 +226,8 @@ var PartialEvaluator = (function partialEvaluator() {
};
var pixels = imgData.data;
imageObj.fillRgbaBuffer(pixels, imageObj.decode);
args = ['normal', [imgData]];
return;
}
// This depends on a tmpCanvas beeing filled with the
// current fillStyle, such that processing the pixel
// data can't be done here. Instead of creating a
// complete PDFImage, only read the information needed
// for later.
var width = dict.get('Width', 'W');
var height = dict.get('Height', 'H');
var bitStrideLength = (width + 7) >> 3;
var imgArray = image.getBytes(bitStrideLength * height);
var decode = dict.get('Decode', 'D');
var inverseDecode = !!decode && decode[0] > 0;
args = ['imageMask', [imgArray, inverseDecode, width, height]];
resolve(imgData);
});
}
uniquePrefix = uniquePrefix || '';