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fix to colorspaces

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This commit is contained in:
sbarman 2011-07-09 16:58:25 -07:00
parent f2a4756c77
commit d38a5488d4
1 changed files with 52 additions and 41 deletions
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93
pdf.js
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@ -4,7 +4,7 @@
'use strict';
var ERRORS = 0, WARNINGS = 1, TODOS = 5;
var verbosity = WARNINGS;
var verbosity = TODOS;
function log(msg) {
if (console && console.log)
@ -4078,9 +4078,13 @@ var CanvasGraphics = (function() {
this.setStrokeRGBColor.apply(this, color);
},
setStrokeColorN: function(/*...*/) {
// TODO real impl
TODO('check for special color spaces');
this.setStrokeColor.apply(this, arguments);
var cs = this.getStrokeColorSpace();
if (cs.name == 'Pattern') {
this.ctx.strokeStyle = this.getPattern(cs, arguments);
} else {
this.setStrokeColor.apply(this, arguments);
}
},
setFillColor: function(/*...*/) {
var cs = this.getFillColorSpace();
@ -4091,28 +4095,28 @@ var CanvasGraphics = (function() {
var cs = this.getFillColorSpace();
if (cs.name == 'Pattern') {
var length = arguments.length;
var base = cs.base;
if (base) {
var baseComps = base.numComps;
if (baseComps != length - 1)
error("invalid base color for pattern colorspace");
var color = [];
for (var i = 0; i < baseComps; ++i)
color.push(arguments[i]);
color = base.getRgb(color);
}
var patternName = arguments[length - 1];
this.setFillPattern(patternName, base, color);
this.ctx.fillStyle = this.getPattern(cs, arguments);
} else {
// TODO real impl
this.setFillColor.apply(this, arguments);
}
},
setFillPattern: function(patternName, baseCS, color) {
getPattern: function(cs, args) {
var length = args.length;
var base = cs.base;
if (base) {
var baseComps = base.numComps;
if (baseComps != length - 1)
error("invalid base color for pattern colorspace");
var color = [];
for (var i = 0; i < baseComps; ++i)
color.push(args[i]);
color = base.getRgb(color);
}
var patternName = args[length - 1];
if (!IsName(patternName))
error("Bad args to getPattern");
@ -4124,17 +4128,17 @@ var CanvasGraphics = (function() {
var pattern = xref.fetchIfRef(patternRes.get(patternName.name));
var dict = IsStream(pattern) ? pattern.dict : pattern;
var types = [null, this.setTilingPattern, this.setShadingPattern];
var types = [null, this.getTilingPattern, this.getShadingPattern];
var typeNum = dict.get("PatternType");
var patternFn = types[typeNum];
if (!patternFn)
error("Unhandled pattern type");
patternFn.call(this, pattern, dict, baseCS, color);
return patternFn.call(this, pattern, dict, color);
},
setShadingPattern: function(pattern, dict) {
getShadingPattern: function(pattern, dict) {
var matrix = dict.get("Matrix");
/*
var inv = [0,0,0,0,0,0];
var det = 1 / (matrix[0] * matrix[3] - matrix[1] * matrix[2]);
inv[0] = matrix[3] * det;
@ -4145,15 +4149,17 @@ var CanvasGraphics = (function() {
inv[5] = det * (matrix[1] * matrix[4] - matrix[0] * matrix[5]);
this.transform.apply(this, matrix);
var shading = this.getShading(pattern.get("Shading"));
this.ctx.fillStyle = shading;
//var shading = this.getShading(pattern.get("Shading"));
*/ return this.getShading(pattern.get("Shading"));
/* this.ctx.fillStyle = shading;
// HACK to get the gradient to show at the right location. If
// removed, the gradient will show at the pre-transform coordinates.
this.ctx.fillRect(0,0,0,0);
this.transform.apply(this, inv);
},
setTilingPattern: function(pattern, dict, baseCS, color) {
*/ },
getTilingPattern: function(pattern, dict, color) {
function multiply(m, tm) {
var a = m[0] * tm[0] + m[1] * tm[2];
var b = m[0] * tm[1] + m[1] * tm[3];
@ -4205,8 +4211,8 @@ var CanvasGraphics = (function() {
tmpCtx.strokeStyle = this.makeCssRgb(0, 0, 0);
break;
case PAINT_TYPE_UNCOLORED:
tmpCtx.fillStyle = this.makeCssRgb.apply(this, baseCS.getRgb(color));
tmpCtx.strokeStyle = this.makeCssRgb.apply(this, baseCS.getRgb(color));
tmpCtx.fillStyle = this.makeCssRgb.apply(this, color);
tmpCtx.strokeStyle = this.makeCssRgb.apply(this, color);
break;
default:
error('Unsupported paint type');
@ -4241,8 +4247,7 @@ var CanvasGraphics = (function() {
this.restore();
TODO('Inverse pattern is painted');
pattern = this.ctx.createPattern(tmpCanvas, 'repeat');
this.ctx.fillStyle = pattern;
return this.ctx.createPattern(tmpCanvas, 'repeat');
},
setStrokeGray: function(gray) {
this.setStrokeRGBColor(gray, gray, gray);
@ -4312,20 +4317,23 @@ var CanvasGraphics = (function() {
this.restore();
},
getShading: function(shading) {
this.save();
shading = this.xref.fetchIfRef(shading);
var dict = IsStream(shading) ? shading.dict : shading;
var bbox = shading.get('BBox');
var bbox = dict.get('BBox');
if (bbox && IsArray(bbox) && 4 == bbox.length) {
this.rectangle.apply(this, bbox);
this.clip();
this.endPath();
}
var background = shading.get('Background');
var background = dict.get('Background');
if (background)
TODO('handle background colors');
var cs = shading.get('ColorSpace', 'CS');
var cs = dict.get('ColorSpace', 'CS');
cs = ColorSpace.parse(cs, this.xref, this.res);
var types = [null,
@ -4333,16 +4341,20 @@ var CanvasGraphics = (function() {
this.getAxialShading,
this.getRadialShading];
var typeNum = shading.get('ShadingType');
var typeNum = dict.get('ShadingType');
var shadingFn = types[typeNum];
this.restore();
// Most likely we will not implement other types of shading
// unless the browser supports them
if (!shadingFn)
if (!shadingFn) {
TODO("Unknown or NYI type of shading '"+ typeNum +"'");
return this.makeCssRgb(0, 0, 0);
}
return shadingFn.call(this, shading, cs);
},
},
getAxialShading: function(sh, cs) {
var coordsArr = sh.get('Coords');
var x0 = coordsArr[0], y0 = coordsArr[1],
@ -4425,7 +4437,6 @@ var CanvasGraphics = (function() {
gradient.addColorStop((i - t0) / diff,
this.makeCssRgb.apply(this, rgbColor));
}
return gradient;
},