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Removes "too many inline images" limit

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Yury Delendik 2012-12-07 12:19:43 -06:00
parent 0910c5e68e
commit d71c702dcf
5 changed files with 230 additions and 53 deletions
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117
src/canvas.js
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@ -224,6 +224,27 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
}
}
function applyStencilMask(imgArray, width, height, inverseDecode, buffer) {
var imgArrayPos = 0;
var i, j, mask, buf;
// removing making non-masked pixels transparent
var bufferPos = 3; // alpha component offset
for (i = 0; i < height; i++) {
mask = 0;
for (j = 0; j < width; j++) {
if (!mask) {
buf = imgArray[imgArrayPos++];
mask = 128;
}
if (!(buf & mask) == inverseDecode) {
buffer[bufferPos] = 0;
}
bufferPos += 4;
mask >>= 1;
}
}
}
function rescaleImage(pixels, width, height, widthScale, heightScale) {
var scaledWidth = Math.ceil(width / widthScale);
var scaledHeight = Math.ceil(height / heightScale);
@ -1213,44 +1234,58 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(
imgArray, inverseDecode, width, height) {
function applyStencilMask(buffer, inverseDecode) {
var imgArrayPos = 0;
var i, j, mask, buf;
// removing making non-masked pixels transparent
var bufferPos = 3; // alpha component offset
for (i = 0; i < height; i++) {
mask = 0;
for (j = 0; j < width; j++) {
if (!mask) {
buf = imgArray[imgArrayPos++];
mask = 128;
}
if (!(buf & mask) == inverseDecode) {
buffer[bufferPos] = 0;
}
bufferPos += 4;
mask >>= 1;
}
}
}
var w = width, h = height;
var tmpCanvas = createScratchCanvas(w, h);
var ctx = this.ctx;
var tmpCanvas = createScratchCanvas(width, height);
var tmpCtx = tmpCanvas.getContext('2d');
var fillColor = this.current.fillColor;
tmpCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') &&
fillColor.type === 'Pattern') ?
fillColor.getPattern(tmpCtx) : fillColor;
tmpCtx.fillRect(0, 0, w, h);
tmpCtx.fillRect(0, 0, width, height);
var imgData = tmpCtx.getImageData(0, 0, w, h);
var imgData = tmpCtx.getImageData(0, 0, width, height);
var pixels = imgData.data;
applyStencilMask(pixels, inverseDecode);
applyStencilMask(imgArray, width, height, inverseDecode, pixels);
this.paintImage(imgData);
this.paintInlineImageXObject(imgData);
},
paintImageMaskXObjectGroup:
function CanvasGraphics_paintImageMaskXObjectGroup(images) {
var ctx = this.ctx;
var tmpCanvasWidth = 0, tmpCanvasHeight = 0, tmpCanvas, tmpCtx;
for (var i = 0, ii = images.length; i < ii; i++) {
var image = images[i];
var w = image.width, h = image.height;
if (w > tmpCanvasWidth || h > tmpCanvasHeight) {
tmpCanvasWidth = Math.max(w, tmpCanvasWidth);
tmpCanvasHeight = Math.max(h, tmpCanvasHeight);
tmpCanvas = createScratchCanvas(tmpCanvasWidth, tmpCanvasHeight);
tmpCtx = tmpCanvas.getContext('2d');
var fillColor = this.current.fillColor;
tmpCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') &&
fillColor.type === 'Pattern') ?
fillColor.getPattern(tmpCtx) : fillColor;
}
tmpCtx.fillRect(0, 0, w, h);
var imgData = tmpCtx.getImageData(0, 0, w, h);
var pixels = imgData.data;
applyStencilMask(image.data, w, h, image.inverseDecode, pixels);
tmpCtx.putImageData(imgData, 0, 0);
ctx.save();
ctx.transform.apply(ctx, image.transform);
ctx.scale(1, -1);
ctx.drawImage(tmpCanvas, 0, 0, w, h,
0, -1, 1, 1);
ctx.restore();
}
},
paintImageXObject: function CanvasGraphics_paintImageXObject(objId) {
@ -1258,10 +1293,11 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
if (!imgData)
error('Dependent image isn\'t ready yet');
this.paintImage(imgData);
this.paintInlineImageXObject(imgData);
},
paintImage: function CanvasGraphics_paintImage(imgData) {
paintInlineImageXObject:
function CanvasGraphics_paintInlineImageXObject(imgData) {
var width = imgData.width;
var height = imgData.height;
var ctx = this.ctx;
@ -1294,6 +1330,27 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
this.restore();
},
paintInlineImageXObjectGroup:
function CanvasGraphics_paintInlineImageXObjectGroup(imgData, map) {
var ctx = this.ctx;
var w = imgData.width;
var h = imgData.height;
var tmpCanvas = createScratchCanvas(w, h);
var tmpCtx = tmpCanvas.getContext('2d');
this.putBinaryImageData(tmpCtx, imgData);
for (var i = 0, ii = map.length; i < ii; i++) {
var entry = map[i];
ctx.save();
ctx.transform.apply(ctx, entry.transform);
ctx.scale(1, -1);
ctx.drawImage(tmpCanvas, entry.x, entry.y, entry.w, entry.h,
0, -1, 1, 1);
ctx.restore();
}
},
putBinaryImageData: function CanvasGraphics_putBinaryImageData(ctx,
imgData) {
var w = imgData.width, h = imgData.height;