mirror of
https://github.com/mozilla/pdf.js.git
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Implements shading types 4-7
This commit is contained in:
Yury Delendik
parent
59526a7cf1
commit
a583c319a1
6 changed files with 3587 additions and 9 deletions
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@ -15,13 +15,18 @@
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* limitations under the License.
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*/
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/* globals ColorSpace, PDFFunction, Util, error, warn, info, isArray, isStream,
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isPDFFunction, UnsupportedManager, UNSUPPORTED_FEATURES */
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assert, isPDFFunction, UnsupportedManager, UNSUPPORTED_FEATURES */
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'use strict';
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var PatternType = {
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FUNCTION_BASED: 1,
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AXIAL: 2,
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RADIAL: 3
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RADIAL: 3,
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FREE_FORM_MESH: 4,
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LATTICE_FORM_MESH: 5,
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COONS_PATCH_MESH: 6,
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TENSOR_PATCH_MESH: 7
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};
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var Pattern = (function PatternClosure() {
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@ -49,6 +54,11 @@ var Pattern = (function PatternClosure() {
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case PatternType.RADIAL:
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// Both radial and axial shadings are handled by RadialAxial shading.
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return new Shadings.RadialAxial(dict, matrix, xref, res);
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case PatternType.FREE_FORM_MESH:
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case PatternType.LATTICE_FORM_MESH:
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case PatternType.COONS_PATCH_MESH:
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case PatternType.TENSOR_PATCH_MESH:
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return new Shadings.Mesh(shading, matrix, xref, res);
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default:
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UnsupportedManager.notify(UNSUPPORTED_FEATURES.shadingPattern);
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return new Shadings.Dummy();
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@ -213,6 +223,537 @@ Shadings.RadialAxial = (function RadialAxialClosure() {
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return RadialAxial;
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})();
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// All mesh shading. For now, they will be presented as set of the triangles
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// to be drawn on the canvas and rgb color for each vertex.
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Shadings.Mesh = (function MeshClosure() {
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function MeshStreamReader(stream, context) {
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this.stream = stream;
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this.context = context;
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this.buffer = 0;
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this.bufferLength = 0;
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}
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MeshStreamReader.prototype = {
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get hasData() {
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if (this.stream.end) {
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return this.stream.pos < this.stream.end;
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}
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if (this.bufferLength > 0) {
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return true;
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}
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var nextByte = this.stream.getByte();
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if (nextByte < 0) {
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return false;
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}
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this.buffer = nextByte;
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this.bufferLength = 8;
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return true;
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},
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readBits: function MeshStreamReader_readBits(n) {
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var buffer = this.buffer;
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var bufferLength = this.bufferLength;
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if (n === 32) {
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if (bufferLength === 0) {
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return ((this.stream.getByte() << 24) |
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(this.stream.getByte() << 16) | (this.stream.getByte() << 8) |
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this.stream.getByte()) >>> 0;
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}
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buffer = (buffer << 24) | (this.stream.getByte() << 16) |
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(this.stream.getByte() << 8) | this.stream.getByte();
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var nextByte = this.stream.getByte();
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this.buffer = nextByte & ((1 << bufferLength) - 1);
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return ((buffer << (8 - bufferLength)) |
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((nextByte & 0xFF) >> bufferLength)) >>> 0;
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}
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if (n === 8 && bufferLength === 0) {
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return this.stream.getByte();
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}
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while (bufferLength < n) {
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buffer = (buffer << 8) | this.stream.getByte();
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bufferLength += 8;
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}
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bufferLength -= n;
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this.bufferLength = bufferLength;
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this.buffer = buffer & ((1 << bufferLength) - 1);
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return buffer >> bufferLength;
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},
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align: function MeshStreamReader_align() {
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this.buffer = 0;
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this.bufferLength = 0;
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},
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readFlag: function MeshStreamReader_readFlag() {
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return this.readBits(this.context.bitsPerFlag);
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},
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readCoordinate: function MeshStreamReader_readCoordinate() {
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var bitsPerCoordinate = this.context.bitsPerCoordinate;
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var xi = this.readBits(bitsPerCoordinate);
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var yi = this.readBits(bitsPerCoordinate);
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var decode = this.context.decode;
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var scale = bitsPerCoordinate < 32 ? 1 / ((1 << bitsPerCoordinate) - 1) :
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2.3283064365386963e-10; // 2 ^ -32
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return [
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xi * scale * (decode[1] - decode[0]) + decode[0],
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yi * scale * (decode[3] - decode[2]) + decode[2]
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];
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},
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readComponents: function MeshStreamReader_readComponents() {
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var numComps = this.context.numComps;
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var bitsPerComponent = this.context.bitsPerComponent;
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var scale = bitsPerComponent < 32 ? 1 / ((1 << bitsPerComponent) - 1) :
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2.3283064365386963e-10; // 2 ^ -32
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var decode = this.context.decode;
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var components = [];
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for (var i = 0, j = 4; i < numComps; i++, j += 2) {
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var ci = this.readBits(bitsPerComponent);
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components.push(ci * scale * (decode[j + 1] - decode[j]) + decode[j]);
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}
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if (this.context.colorFn) {
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components = this.context.colorFn(components);
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}
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return this.context.colorSpace.getRgb(components, 0);
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}
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};
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function decodeType4Shading(mesh, reader) {
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var coords = mesh.coords;
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var colors = mesh.colors;
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var operators = [];
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var ps = []; // not maintaining cs since that will match ps
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var verticesLeft = 0; // assuming we have all data to start a new triangle
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while (reader.hasData) {
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var f = reader.readFlag();
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var coord = reader.readCoordinate();
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var color = reader.readComponents();
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if (verticesLeft === 0) { // ignoring flags if we started a triangle
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assert(0 <= f && f <= 2, 'Unknown type4 flag');
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switch (f) {
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case 0:
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verticesLeft = 3;
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break;
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case 1:
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ps.push(ps[ps.length - 2], ps[ps.length - 1]);
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verticesLeft = 1;
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break;
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case 2:
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ps.push(ps[ps.length - 3], ps[ps.length - 1]);
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verticesLeft = 1;
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break;
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}
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operators.push(f);
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}
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ps.push(coords.length);
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coords.push(coord);
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colors.push(color);
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verticesLeft--;
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reader.align();
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}
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var psPacked = new Int32Array(ps);
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mesh.figures.push({
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type: 'triangles',
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coords: psPacked,
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colors: psPacked
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});
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}
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function decodeType5Shading(mesh, reader, verticesPerRow) {
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var coords = mesh.coords;
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var colors = mesh.colors;
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var operators = [];
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var ps = []; // not maintaining cs since that will match ps
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while (reader.hasData) {
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var coord = reader.readCoordinate();
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var color = reader.readComponents();
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ps.push(coords.length);
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coords.push(coord);
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colors.push(color);
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}
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var psPacked = new Int32Array(ps);
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mesh.figures.push({
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type: 'lattice',
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coords: psPacked,
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colors: psPacked,
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verticesPerRow: verticesPerRow
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});
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}
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var SPLIT_PATCH_CHUNKS_AMOUNT = 4;
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var B = (function buildB() {
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var lut = [];
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for (var i = 0; i <= SPLIT_PATCH_CHUNKS_AMOUNT; i++) {
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var t = i / SPLIT_PATCH_CHUNKS_AMOUNT, t_ = 1 - t;
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lut.push(new Float32Array([t_ * t_ * t_, 3 * t * t_ * t_,
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3 * t * t * t_, t * t * t]));
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}
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return lut;
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})();
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function buildFigureFromPatch(mesh, pi, ci) {
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if (SPLIT_PATCH_CHUNKS_AMOUNT < 3) {
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mesh.figures.push({
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type: 'lattice',
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coords: new Int32Array([pi[0], pi[3], pi[12], pi[15]]),
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colors: new Int32Array(ci),
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verticesPerRow: 2
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});
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return;
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}
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var coords = mesh.coords, colors = mesh.colors;
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var verticesPerRow = SPLIT_PATCH_CHUNKS_AMOUNT + 1;
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var figureCoords = new Int32Array((SPLIT_PATCH_CHUNKS_AMOUNT + 1) *
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verticesPerRow);
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var figureColors = new Int32Array((SPLIT_PATCH_CHUNKS_AMOUNT + 1) *
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verticesPerRow);
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var k = 0;
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var cl = new Uint8Array(3), cr = new Uint8Array(3);
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var c0 = colors[ci[0]], c1 = colors[ci[1]],
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c2 = colors[ci[2]], c3 = colors[ci[3]];
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for (var row = 0; row <= SPLIT_PATCH_CHUNKS_AMOUNT; row++) {
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cl[0] = ((c0[0] * (SPLIT_PATCH_CHUNKS_AMOUNT - row) +
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c2[0] * row) / SPLIT_PATCH_CHUNKS_AMOUNT) | 0;
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cl[1] = ((c0[1] * (SPLIT_PATCH_CHUNKS_AMOUNT - row) +
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c2[1] * row) / SPLIT_PATCH_CHUNKS_AMOUNT) | 0;
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cl[2] = ((c0[2] * (SPLIT_PATCH_CHUNKS_AMOUNT - row) +
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c2[2] * row) / SPLIT_PATCH_CHUNKS_AMOUNT) | 0;
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cr[0] = ((c1[0] * (SPLIT_PATCH_CHUNKS_AMOUNT - row) +
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c3[0] * row) / SPLIT_PATCH_CHUNKS_AMOUNT) | 0;
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cr[1] = ((c1[1] * (SPLIT_PATCH_CHUNKS_AMOUNT - row) +
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c3[1] * row) / SPLIT_PATCH_CHUNKS_AMOUNT) | 0;
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cr[2] = ((c1[2] * (SPLIT_PATCH_CHUNKS_AMOUNT - row) +
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c3[2] * row) / SPLIT_PATCH_CHUNKS_AMOUNT) | 0;
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for (var col = 0; col <= SPLIT_PATCH_CHUNKS_AMOUNT; col++, k++) {
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if ((row === 0 || row === SPLIT_PATCH_CHUNKS_AMOUNT) &&
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(col === 0 || col === SPLIT_PATCH_CHUNKS_AMOUNT)) {
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continue;
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}
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var x = 0, y = 0;
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var q = 0;
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for (var i = 0; i <= 3; i++) {
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for (var j = 0; j <= 3; j++, q++) {
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var m = B[row][i] * B[col][j];
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x += coords[pi[q]][0] * m;
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y += coords[pi[q]][1] * m;
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}
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}
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figureCoords[k] = coords.length;
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coords.push([x, y]);
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figureColors[k] = colors.length;
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var newColor = new Uint8Array(3);
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newColor[0] = ((cl[0] * (SPLIT_PATCH_CHUNKS_AMOUNT - col) +
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cr[0] * col) / SPLIT_PATCH_CHUNKS_AMOUNT) | 0;
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newColor[1] = ((cl[1] * (SPLIT_PATCH_CHUNKS_AMOUNT - col) +
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cr[1] * col) / SPLIT_PATCH_CHUNKS_AMOUNT) | 0;
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newColor[2] = ((cl[2] * (SPLIT_PATCH_CHUNKS_AMOUNT - col) +
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cr[2] * col) / SPLIT_PATCH_CHUNKS_AMOUNT) | 0;
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colors.push(newColor);
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}
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}
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figureCoords[0] = pi[0];
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figureColors[0] = ci[0];
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figureCoords[SPLIT_PATCH_CHUNKS_AMOUNT] = pi[3];
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figureColors[SPLIT_PATCH_CHUNKS_AMOUNT] = ci[1];
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figureCoords[verticesPerRow * SPLIT_PATCH_CHUNKS_AMOUNT] = pi[12];
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figureColors[verticesPerRow * SPLIT_PATCH_CHUNKS_AMOUNT] = ci[2];
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figureCoords[verticesPerRow * verticesPerRow - 1] = pi[15];
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figureColors[verticesPerRow * verticesPerRow - 1] = ci[3];
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mesh.figures.push({
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type: 'lattice',
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coords: figureCoords,
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colors: figureColors,
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verticesPerRow: verticesPerRow
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});
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}
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function decodeType6Shading(mesh, reader) {
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// A special case of Type 7. The p11, p12, p21, p22 automatically filled
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var coords = mesh.coords;
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var colors = mesh.colors;
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var ps = new Int32Array(16); // p00, p10, ..., p30, p01, ..., p33
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var cs = new Int32Array(4); // c00, c30, c03, c33
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while (reader.hasData) {
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var f = reader.readFlag();
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assert(0 <= f && f <= 3, 'Unknown type6 flag');
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var i, ii;
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var pi = coords.length;
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for (i = 0, ii = (f !== 0 ? 8 : 12); i < ii; i++) {
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coords.push(reader.readCoordinate());
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}
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var ci = colors.length;
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for (i = 0, ii = (f !== 0 ? 2 : 4); i < ii; i++) {
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colors.push(reader.readComponents());
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}
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var tmp1, tmp2, tmp3, tmp4;
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switch (f) {
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case 0:
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ps[12] = pi + 3; ps[13] = pi + 4; ps[14] = pi + 5; ps[15] = pi + 6;
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ps[ 8] = pi + 2; /* values for 5, 6, 9, 10 are */ ps[11] = pi + 7;
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ps[ 4] = pi + 1; /* calculated below */ ps[ 7] = pi + 8;
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ps[ 0] = pi; ps[ 1] = pi + 11; ps[ 2] = pi + 10; ps[ 3] = pi + 9;
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cs[2] = ci + 1; cs[3] = ci + 2;
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cs[0] = ci; cs[1] = ci + 3;
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break;
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case 1:
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tmp1 = ps[12]; tmp2 = ps[13]; tmp3 = ps[14]; tmp4 = ps[15];
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ps[12] = pi + 5; ps[13] = pi + 4; ps[14] = pi + 3; ps[15] = pi + 2;
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ps[ 8] = pi + 6; /* values for 5, 6, 9, 10 are */ ps[11] = pi + 1;
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ps[ 4] = pi + 7; /* calculated below */ ps[ 7] = pi;
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ps[ 0] = tmp1; ps[ 1] = tmp2; ps[ 2] = tmp3; ps[ 3] = tmp4;
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tmp1 = cs[2]; tmp2 = cs[3];
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cs[2] = ci + 1; cs[3] = ci;
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cs[0] = tmp1; cs[1] = tmp2;
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break;
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case 2:
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ps[12] = ps[15]; ps[13] = pi + 7; ps[14] = pi + 6; ps[15] = pi + 5;
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ps[ 8] = ps[11]; /* values for 5, 6, 9, 10 are */ ps[11] = pi + 4;
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ps[ 4] = ps[7]; /* calculated below */ ps[ 7] = pi + 3;
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ps[ 0] = ps[3]; ps[ 1] = pi; ps[ 2] = pi + 1; ps[ 3] = pi + 2;
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cs[2] = cs[3]; cs[3] = ci + 1;
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cs[0] = cs[1]; cs[1] = ci;
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break;
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case 3:
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ps[12] = ps[0]; ps[13] = ps[1]; ps[14] = ps[2]; ps[15] = ps[3];
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ps[ 8] = pi; /* values for 5, 6, 9, 10 are */ ps[11] = pi + 7;
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ps[ 4] = pi + 1; /* calculated below */ ps[ 7] = pi + 6;
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ps[ 0] = pi + 2; ps[ 1] = pi + 3; ps[ 2] = pi + 4; ps[ 3] = pi + 5;
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cs[2] = cs[0]; cs[3] = cs[1];
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cs[0] = ci; cs[1] = ci + 1;
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break;
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}
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// set p11, p12, p21, p22
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ps[5] = coords.length;
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coords.push([
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(-4 * coords[ps[0]][0] - coords[ps[15]][0] +
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6 * (coords[ps[4]][0] + coords[ps[1]][0]) -
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2 * (coords[ps[12]][0] + coords[ps[3]][0]) +
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3 * (coords[ps[13]][0] + coords[ps[7]][0])) / 9,
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(-4 * coords[ps[0]][1] - coords[ps[15]][1] +
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6 * (coords[ps[4]][1] + coords[ps[1]][1]) -
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2 * (coords[ps[12]][1] + coords[ps[3]][1]) +
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3 * (coords[ps[13]][1] + coords[ps[7]][1])) / 9
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]);
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ps[6] = coords.length;
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coords.push([
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(-4 * coords[ps[3]][0] - coords[ps[12]][0] +
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6 * (coords[ps[2]][0] + coords[ps[7]][0]) -
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2 * (coords[ps[0]][0] + coords[ps[15]][0]) +
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3 * (coords[ps[4]][0] + coords[ps[14]][0])) / 9,
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(-4 * coords[ps[3]][1] - coords[ps[12]][1] +
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6 * (coords[ps[2]][1] + coords[ps[7]][1]) -
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2 * (coords[ps[0]][1] + coords[ps[15]][1]) +
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3 * (coords[ps[4]][1] + coords[ps[14]][1])) / 9
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]);
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ps[9] = coords.length;
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coords.push([
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(-4 * coords[ps[12]][0] - coords[ps[3]][0] +
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6 * (coords[ps[8]][0] + coords[ps[13]][0]) -
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2 * (coords[ps[0]][0] + coords[ps[15]][0]) +
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3 * (coords[ps[11]][0] + coords[ps[1]][0])) / 9,
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(-4 * coords[ps[12]][1] - coords[ps[3]][1] +
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6 * (coords[ps[8]][1] + coords[ps[13]][1]) -
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2 * (coords[ps[0]][1] + coords[ps[15]][1]) +
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3 * (coords[ps[11]][1] + coords[ps[1]][1])) / 9
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]);
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ps[10] = coords.length;
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coords.push([
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(-4 * coords[ps[15]][0] - coords[ps[0]][0] +
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6 * (coords[ps[11]][0] + coords[ps[14]][0]) -
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2 * (coords[ps[12]][0] + coords[ps[3]][0]) +
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3 * (coords[ps[2]][0] + coords[ps[8]][0])) / 9,
|
||||
(-4 * coords[ps[15]][1] - coords[ps[0]][1] +
|
||||
6 * (coords[ps[11]][1] + coords[ps[14]][1]) -
|
||||
2 * (coords[ps[12]][1] + coords[ps[3]][1]) +
|
||||
3 * (coords[ps[2]][1] + coords[ps[8]][1])) / 9
|
||||
]);
|
||||
buildFigureFromPatch(mesh, ps, cs);
|
||||
}
|
||||
}
|
||||
|
||||
function decodeType7Shading(mesh, reader) {
|
||||
var coords = mesh.coords;
|
||||
var colors = mesh.colors;
|
||||
var ps = new Int32Array(16); // p00, p10, ..., p30, p01, ..., p33
|
||||
var cs = new Int32Array(4); // c00, c30, c03, c33
|
||||
while (reader.hasData) {
|
||||
var f = reader.readFlag();
|
||||
assert(0 <= f && f <= 3, 'Unknown type7 flag');
|
||||
var i, ii;
|
||||
var pi = coords.length;
|
||||
for (i = 0, ii = (f !== 0 ? 12 : 16); i < ii; i++) {
|
||||
coords.push(reader.readCoordinate());
|
||||
}
|
||||
var ci = colors.length;
|
||||
for (i = 0, ii = (f !== 0 ? 2 : 4); i < ii; i++) {
|
||||
colors.push(reader.readComponents());
|
||||
}
|
||||
var tmp1, tmp2, tmp3, tmp4;
|
||||
switch (f) {
|
||||
case 0:
|
||||
ps[12] = pi + 3; ps[13] = pi + 4; ps[14] = pi + 5; ps[15] = pi + 6;
|
||||
ps[ 8] = pi + 2; ps[ 9] = pi + 13; ps[10] = pi + 14; ps[11] = pi + 7;
|
||||
ps[ 4] = pi + 1; ps[ 5] = pi + 12; ps[ 6] = pi + 15; ps[ 7] = pi + 8;
|
||||
ps[ 0] = pi; ps[ 1] = pi + 11; ps[ 2] = pi + 10; ps[ 3] = pi + 9;
|
||||
cs[2] = ci + 1; cs[3] = ci + 2;
|
||||
cs[0] = ci; cs[1] = ci + 3;
|
||||
break;
|
||||
case 1:
|
||||
tmp1 = ps[12]; tmp2 = ps[13]; tmp3 = ps[14]; tmp4 = ps[15];
|
||||
ps[12] = pi + 5; ps[13] = pi + 4; ps[14] = pi + 3; ps[15] = pi + 2;
|
||||
ps[ 8] = pi + 6; ps[ 9] = pi + 11; ps[10] = pi + 10; ps[11] = pi + 1;
|
||||
ps[ 4] = pi + 7; ps[ 5] = pi + 8; ps[ 6] = pi + 9; ps[ 7] = pi;
|
||||
ps[ 0] = tmp1; ps[ 1] = tmp2; ps[ 2] = tmp3; ps[ 3] = tmp4;
|
||||
tmp1 = cs[2]; tmp2 = cs[3];
|
||||
cs[2] = ci + 1; cs[3] = ci;
|
||||
cs[0] = tmp1; cs[1] = tmp2;
|
||||
break;
|
||||
case 2:
|
||||
ps[12] = ps[15]; ps[13] = pi + 7; ps[14] = pi + 6; ps[15] = pi + 5;
|
||||
ps[ 8] = ps[11]; ps[ 9] = pi + 8; ps[10] = pi + 11; ps[11] = pi + 4;
|
||||
ps[ 4] = ps[7]; ps[ 5] = pi + 9; ps[ 6] = pi + 10; ps[ 7] = pi + 3;
|
||||
ps[ 0] = ps[3]; ps[ 1] = pi; ps[ 2] = pi + 1; ps[ 3] = pi + 2;
|
||||
cs[2] = cs[3]; cs[3] = ci + 1;
|
||||
cs[0] = cs[1]; cs[1] = ci;
|
||||
break;
|
||||
case 3:
|
||||
ps[12] = ps[0]; ps[13] = ps[1]; ps[14] = ps[2]; ps[15] = ps[3];
|
||||
ps[ 8] = pi; ps[ 9] = pi + 9; ps[10] = pi + 8; ps[11] = pi + 7;
|
||||
ps[ 4] = pi + 1; ps[ 5] = pi + 10; ps[ 6] = pi + 11; ps[ 7] = pi + 6;
|
||||
ps[ 0] = pi + 2; ps[ 1] = pi + 3; ps[ 2] = pi + 4; ps[ 3] = pi + 5;
|
||||
cs[2] = cs[0]; cs[3] = cs[1];
|
||||
cs[0] = ci; cs[1] = ci + 1;
|
||||
break;
|
||||
}
|
||||
buildFigureFromPatch(mesh, ps, cs);
|
||||
}
|
||||
}
|
||||
|
||||
function Mesh(stream, matrix, xref, res) {
|
||||
assert(isStream(stream), 'Mesh data is not a stream');
|
||||
var dict = stream.dict;
|
||||
this.matrix = matrix;
|
||||
this.shadingType = dict.get('ShadingType');
|
||||
this.type = 'Pattern';
|
||||
this.bbox = dict.get('BBox');
|
||||
var cs = dict.get('ColorSpace', 'CS');
|
||||
cs = ColorSpace.parse(cs, xref, res);
|
||||
this.cs = cs;
|
||||
this.background = dict.has('Background') ?
|
||||
cs.getRgb(dict.get('Background'), 0) : null;
|
||||
|
||||
var fnObj = dict.get('Function');
|
||||
var fn;
|
||||
if (!fnObj) {
|
||||
fn = null;
|
||||
} else if (isArray(fnObj)) {
|
||||
var fnArray = [];
|
||||
for (var j = 0, jj = fnObj.length; j < jj; j++) {
|
||||
var obj = xref.fetchIfRef(fnObj[j]);
|
||||
if (!isPDFFunction(obj)) {
|
||||
error('Invalid function');
|
||||
}
|
||||
fnArray.push(PDFFunction.parse(xref, obj));
|
||||
}
|
||||
fn = function radialAxialColorFunction(arg) {
|
||||
var out = [];
|
||||
for (var i = 0, ii = fnArray.length; i < ii; i++) {
|
||||
out.push(fnArray[i](arg)[0]);
|
||||
}
|
||||
return out;
|
||||
};
|
||||
} else {
|
||||
if (!isPDFFunction(fnObj)) {
|
||||
error('Invalid function');
|
||||
}
|
||||
fn = PDFFunction.parse(xref, fnObj);
|
||||
}
|
||||
|
||||
this.coords = [];
|
||||
this.colors = [];
|
||||
this.figures = [];
|
||||
|
||||
var decodeContext = {
|
||||
bitsPerCoordinate: dict.get('BitsPerCoordinate'),
|
||||
bitsPerComponent: dict.get('BitsPerComponent'),
|
||||
bitsPerFlag: dict.get('BitsPerFlag'),
|
||||
decode: dict.get('Decode'),
|
||||
colorFn: fn,
|
||||
colorSpace: cs,
|
||||
numComps: fn ? 1 : cs.numComps
|
||||
};
|
||||
var reader = new MeshStreamReader(stream, decodeContext);
|
||||
|
||||
switch (this.shadingType) {
|
||||
case PatternType.FREE_FORM_MESH:
|
||||
decodeType4Shading(this, reader);
|
||||
break;
|
||||
case PatternType.LATTICE_FORM_MESH:
|
||||
var verticesPerRow = dict.get('VerticesPerRow') | 0;
|
||||
assert(verticesPerRow >= 2, 'Invalid VerticesPerRow');
|
||||
decodeType5Shading(this, reader, verticesPerRow);
|
||||
break;
|
||||
case PatternType.COONS_PATCH_MESH:
|
||||
decodeType6Shading(this, reader);
|
||||
break;
|
||||
case PatternType.TENSOR_PATCH_MESH:
|
||||
decodeType7Shading(this, reader);
|
||||
break;
|
||||
default:
|
||||
error('Unsupported mesh type.');
|
||||
break;
|
||||
}
|
||||
|
||||
// calculate bounds
|
||||
var minX = this.coords[0][0], minY = this.coords[0][1],
|
||||
maxX = minX, maxY = minY;
|
||||
for (var i = 1, ii = this.coords.length; i < ii; i++) {
|
||||
var x = this.coords[i][0], y = this.coords[i][1];
|
||||
minX = minX > x ? x : minX;
|
||||
minY = minY > y ? y : minY;
|
||||
maxX = maxX < x ? x : maxX;
|
||||
maxY = maxY < y ? y : maxY;
|
||||
}
|
||||
this.bounds = [minX, minY, maxX, maxY];
|
||||
}
|
||||
|
||||
Mesh.prototype = {
|
||||
getIR: function Mesh_getIR() {
|
||||
var type = this.shadingType;
|
||||
var i, ii, j;
|
||||
var coords = this.coords;
|
||||
var coordsPacked = new Float32Array(coords.length * 2);
|
||||
for (i = 0, j = 0, ii = coords.length; i < ii; i++) {
|
||||
var xy = coords[i];
|
||||
coordsPacked[j++] = xy[0];
|
||||
coordsPacked[j++] = xy[1];
|
||||
}
|
||||
var colors = this.colors;
|
||||
var colorsPacked = new Uint8Array(colors.length * 3);
|
||||
for (i = 0, j = 0, ii = colors.length; i < ii; i++) {
|
||||
var c = colors[i];
|
||||
colorsPacked[j++] = c[0];
|
||||
colorsPacked[j++] = c[1];
|
||||
colorsPacked[j++] = c[2];
|
||||
}
|
||||
var figures = this.figures;
|
||||
var bbox = this.bbox;
|
||||
var bounds = this.bounds;
|
||||
var matrix = this.matrix;
|
||||
var background = this.background;
|
||||
|
||||
return ['Mesh', type, coordsPacked, colorsPacked, figures, bounds,
|
||||
matrix, bbox, background];
|
||||
}
|
||||
};
|
||||
|
||||
return Mesh;
|
||||
})();
|
||||
|
||||
Shadings.Dummy = (function DummyClosure() {
|
||||
function Dummy() {
|
||||
this.type = 'Pattern';
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue