Refactors optimization list
This commit is contained in:
Yury Delendik
parent
1c0e1cc591
commit
dbb3d17d8f
@ -1236,136 +1236,6 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
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}
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};
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PartialEvaluator.optimizeQueue =
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function PartialEvaluator_optimizeQueue(queue) {
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function squash(array, index, howMany, element) {
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if (isArray(array)) {
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array.splice(index, howMany, element);
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} else {
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// Replace the element.
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array[index] = element;
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// Shift everything after the element up.
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var sub = array.subarray(index + howMany);
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array.set(sub, index + 1);
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}
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}
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var fnArray = queue.fnArray, argsArray = queue.argsArray;
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// grouping paintInlineImageXObject's into paintInlineImageXObjectGroup
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// searching for (save, transform, paintInlineImageXObject, restore)+
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var MIN_IMAGES_IN_INLINE_IMAGES_BLOCK = 10;
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var MAX_IMAGES_IN_INLINE_IMAGES_BLOCK = 200;
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var MAX_WIDTH = 1000;
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var IMAGE_PADDING = 1;
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for (var i = 0, ii = argsArray.length; i < ii; i++) {
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if (fnArray[i] === OPS.paintInlineImageXObject &&
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fnArray[i - 2] === OPS.save && fnArray[i - 1] === OPS.transform &&
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fnArray[i + 1] === OPS.restore) {
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var j = i - 2;
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for (i += 2; i < ii && fnArray[i - 4] === fnArray[i]; i++) {
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}
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var count = Math.min((i - j) >> 2,
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MAX_IMAGES_IN_INLINE_IMAGES_BLOCK);
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if (count < MIN_IMAGES_IN_INLINE_IMAGES_BLOCK) {
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continue;
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}
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// assuming that heights of those image is too small (~1 pixel)
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// packing as much as possible by lines
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var maxX = 0;
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var map = [], maxLineHeight = 0;
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var currentX = IMAGE_PADDING, currentY = IMAGE_PADDING;
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for (var q = 0; q < count; q++) {
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var transform = argsArray[j + (q << 2) + 1];
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var img = argsArray[j + (q << 2) + 2][0];
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if (currentX + img.width > MAX_WIDTH) {
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// starting new line
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maxX = Math.max(maxX, currentX);
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currentY += maxLineHeight + 2 * IMAGE_PADDING;
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currentX = 0;
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maxLineHeight = 0;
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}
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map.push({
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transform: transform,
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x: currentX, y: currentY,
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w: img.width, h: img.height
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});
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currentX += img.width + 2 * IMAGE_PADDING;
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maxLineHeight = Math.max(maxLineHeight, img.height);
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}
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var imgWidth = Math.max(maxX, currentX) + IMAGE_PADDING;
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var imgHeight = currentY + maxLineHeight + IMAGE_PADDING;
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var imgData = new Uint8Array(imgWidth * imgHeight * 4);
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var imgRowSize = imgWidth << 2;
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for (var q = 0; q < count; q++) {
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var data = argsArray[j + (q << 2) + 2][0].data;
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// copy image by lines and extends pixels into padding
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var rowSize = map[q].w << 2;
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var dataOffset = 0;
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var offset = (map[q].x + map[q].y * imgWidth) << 2;
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imgData.set(
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data.subarray(0, rowSize), offset - imgRowSize);
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for (var k = 0, kk = map[q].h; k < kk; k++) {
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imgData.set(
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data.subarray(dataOffset, dataOffset + rowSize), offset);
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dataOffset += rowSize;
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offset += imgRowSize;
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}
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imgData.set(
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data.subarray(dataOffset - rowSize, dataOffset), offset);
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while (offset >= 0) {
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data[offset - 4] = data[offset];
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data[offset - 3] = data[offset + 1];
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data[offset - 2] = data[offset + 2];
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data[offset - 1] = data[offset + 3];
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data[offset + rowSize] = data[offset + rowSize - 4];
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data[offset + rowSize + 1] = data[offset + rowSize - 3];
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data[offset + rowSize + 2] = data[offset + rowSize - 2];
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data[offset + rowSize + 3] = data[offset + rowSize - 1];
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offset -= imgRowSize;
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}
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}
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// replacing queue items
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squash(fnArray, j, count * 4, OPS.paintInlineImageXObjectGroup);
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argsArray.splice(j, count * 4,
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[{width: imgWidth, height: imgHeight, kind: ImageKind.RGBA_32BPP,
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data: imgData}, map]);
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i = j;
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ii = argsArray.length;
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}
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}
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// grouping paintImageMaskXObject's into paintImageMaskXObjectGroup
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// searching for (save, transform, paintImageMaskXObject, restore)+
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var MIN_IMAGES_IN_MASKS_BLOCK = 10;
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var MAX_IMAGES_IN_MASKS_BLOCK = 100;
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for (var i = 0, ii = argsArray.length; i < ii; i++) {
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if (fnArray[i] === OPS.paintImageMaskXObject &&
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fnArray[i - 2] === OPS.save && fnArray[i - 1] === OPS.transform &&
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fnArray[i + 1] === OPS.restore) {
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var j = i - 2;
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for (i += 2; i < ii && fnArray[i - 4] === fnArray[i]; i++) {
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}
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var count = Math.min((i - j) >> 2,
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MAX_IMAGES_IN_MASKS_BLOCK);
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if (count < MIN_IMAGES_IN_MASKS_BLOCK) {
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continue;
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}
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var images = [];
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for (var q = 0; q < count; q++) {
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var transform = argsArray[j + (q << 2) + 1];
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var maskParams = argsArray[j + (q << 2) + 2][0];
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images.push({data: maskParams.data, width: maskParams.width,
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height: maskParams.height, transform: transform});
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}
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// replacing queue items
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squash(fnArray, j, count * 4, OPS.paintImageMaskXObjectGroup);
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argsArray.splice(j, count * 4, [images]);
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i = j;
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ii = argsArray.length;
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}
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}
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};
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return PartialEvaluator;
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})();
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@ -1454,7 +1324,7 @@ var OperatorList = (function OperatorListClosure() {
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},
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flush: function(lastChunk) {
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PartialEvaluator.optimizeQueue(this);
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new QueueOptimizer().optimize(this);
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var transfers = getTransfers(this);
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this.messageHandler.send('RenderPageChunk', {
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operatorList: {
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@ -1758,3 +1628,173 @@ var EvaluatorPreprocessor = (function EvaluatorPreprocessor() {
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};
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return EvaluatorPreprocessor;
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})();
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var QueueOptimizer = (function QueueOptimizerClosure() {
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function squash(array, index, howMany, element) {
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if (isArray(array)) {
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array.splice(index, howMany, element);
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} else {
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// Replace the element.
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array[index] = element;
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// Shift everything after the element up.
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var sub = array.subarray(index + howMany);
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array.set(sub, index + 1);
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}
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}
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function addState(parentState, pattern, fn) {
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var state = parentState;
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for (var i = 0, ii = pattern.length - 1; i < ii; i++) {
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var item = pattern[i];
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state = state[item] || (state[item] = []);
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}
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state[pattern[pattern.length - 1]] = fn;
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}
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var InitialState = [];
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addState(InitialState,
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[OPS.save, OPS.transform, OPS.paintInlineImageXObject, OPS.restore],
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function foundInlineImageGroup(context) {
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// grouping paintInlineImageXObject's into paintInlineImageXObjectGroup
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// searching for (save, transform, paintInlineImageXObject, restore)+
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var MIN_IMAGES_IN_INLINE_IMAGES_BLOCK = 10;
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var MAX_IMAGES_IN_INLINE_IMAGES_BLOCK = 200;
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var MAX_WIDTH = 1000;
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var IMAGE_PADDING = 1;
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var fnArray = context.fnArray, argsArray = context.argsArray;
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var j = context.currentOperation - 3, i = j + 4;
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var ii = context.operationsLength;
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for (; i < ii && fnArray[i - 4] === fnArray[i]; i++) {
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}
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var count = Math.min((i - j) >> 2, MAX_IMAGES_IN_INLINE_IMAGES_BLOCK);
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if (count < MIN_IMAGES_IN_INLINE_IMAGES_BLOCK) {
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context.currentOperation = i - 1;
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return;
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}
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// assuming that heights of those image is too small (~1 pixel)
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// packing as much as possible by lines
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var maxX = 0;
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var map = [], maxLineHeight = 0;
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var currentX = IMAGE_PADDING, currentY = IMAGE_PADDING;
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for (var q = 0; q < count; q++) {
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var transform = argsArray[j + (q << 2) + 1];
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var img = argsArray[j + (q << 2) + 2][0];
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if (currentX + img.width > MAX_WIDTH) {
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// starting new line
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maxX = Math.max(maxX, currentX);
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currentY += maxLineHeight + 2 * IMAGE_PADDING;
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currentX = 0;
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maxLineHeight = 0;
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}
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map.push({
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transform: transform,
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x: currentX, y: currentY,
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w: img.width, h: img.height
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});
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currentX += img.width + 2 * IMAGE_PADDING;
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maxLineHeight = Math.max(maxLineHeight, img.height);
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}
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var imgWidth = Math.max(maxX, currentX) + IMAGE_PADDING;
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var imgHeight = currentY + maxLineHeight + IMAGE_PADDING;
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var imgData = new Uint8Array(imgWidth * imgHeight * 4);
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var imgRowSize = imgWidth << 2;
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for (var q = 0; q < count; q++) {
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var data = argsArray[j + (q << 2) + 2][0].data;
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// copy image by lines and extends pixels into padding
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var rowSize = map[q].w << 2;
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var dataOffset = 0;
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var offset = (map[q].x + map[q].y * imgWidth) << 2;
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imgData.set(
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data.subarray(0, rowSize), offset - imgRowSize);
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for (var k = 0, kk = map[q].h; k < kk; k++) {
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imgData.set(
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data.subarray(dataOffset, dataOffset + rowSize), offset);
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dataOffset += rowSize;
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offset += imgRowSize;
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}
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imgData.set(
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data.subarray(dataOffset - rowSize, dataOffset), offset);
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while (offset >= 0) {
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data[offset - 4] = data[offset];
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data[offset - 3] = data[offset + 1];
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data[offset - 2] = data[offset + 2];
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data[offset - 1] = data[offset + 3];
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data[offset + rowSize] = data[offset + rowSize - 4];
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data[offset + rowSize + 1] = data[offset + rowSize - 3];
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data[offset + rowSize + 2] = data[offset + rowSize - 2];
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data[offset + rowSize + 3] = data[offset + rowSize - 1];
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offset -= imgRowSize;
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}
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}
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// replacing queue items
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squash(fnArray, j, count * 4, OPS.paintInlineImageXObjectGroup);
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argsArray.splice(j, count * 4,
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[{width: imgWidth, height: imgHeight, kind: ImageKind.RGBA_32BPP,
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data: imgData}, map]);
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context.currentOperation = j;
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context.operationsLength -= count * 4 - 1;
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});
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addState(InitialState,
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[OPS.save, OPS.transform, OPS.paintImageMaskXObject, OPS.restore],
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function foundImageMaskGroup(context) {
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// grouping paintImageMaskXObject's into paintImageMaskXObjectGroup
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// searching for (save, transform, paintImageMaskXObject, restore)+
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var MIN_IMAGES_IN_MASKS_BLOCK = 10;
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var MAX_IMAGES_IN_MASKS_BLOCK = 100;
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var fnArray = context.fnArray, argsArray = context.argsArray;
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var j = context.currentOperation - 3, i = j + 4;
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var ii = context.operationsLength;
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for (; i < ii && fnArray[i - 4] === fnArray[i]; i++) {
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}
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var count = Math.min((i - j) >> 2, MAX_IMAGES_IN_MASKS_BLOCK);
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if (count < MIN_IMAGES_IN_MASKS_BLOCK) {
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context.currentOperation = i - 1;
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return;
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}
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var images = [];
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for (var q = 0; q < count; q++) {
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var transform = argsArray[j + (q << 2) + 1];
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var maskParams = argsArray[j + (q << 2) + 2][0];
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images.push({data: maskParams.data, width: maskParams.width,
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height: maskParams.height, transform: transform});
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}
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// replacing queue items
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squash(fnArray, j, count * 4, OPS.paintImageMaskXObjectGroup);
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argsArray.splice(j, count * 4, [images]);
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context.currentOperation = j;
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context.operationsLength -= count * 4 - 1;
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});
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function QueueOptimizer() {
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}
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QueueOptimizer.prototype = {
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optimize: function QueueOptimizer_optimize(queue) {
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var fnArray = queue.fnArray, argsArray = queue.argsArray;
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var context = {
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currentOperation: 0,
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operationsLength: argsArray.length,
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fnArray: fnArray,
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argsArray: argsArray
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};
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var i, ii = argsArray.length;
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var state;
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for (i = 0; i < ii; i++) {
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state = (state || InitialState)[fnArray[i]];
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if (typeof state === 'function') { // we found some handler
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context.currentOperation = i;
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state = state(context);
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i = context.currentOperation;
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ii = context.operationsLength;
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}
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}
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}
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};
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return QueueOptimizer;
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})();
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