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Added hack to display gradients

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sbarman 2011-07-05 22:51:58 -07:00
parent 8621e1c358
commit 493fb45efd
1 changed files with 26 additions and 15 deletions
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pdf.js
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@ -3948,13 +3948,13 @@ var CanvasGraphics = (function() {
if (cs.name == "Pattern") {
var patternName = arguments[0];
this.ctx.fillStyle = this.getPattern(patternName);
this.setFillPattern(patternName);
} else {
// TODO real impl
this.setFillColor.apply(this, arguments);
}
},
getPattern: function(patternName) {
setFillPattern: function(patternName) {
if (!IsName(patternName))
error("Bad args to getPattern");
@ -3964,27 +3964,40 @@ var CanvasGraphics = (function() {
error("Unable to find pattern resource");
var pattern = xref.fetchIfRef(patternRes.get(patternName.name));
var patternDict = IsStream(pattern) ? pattern.dict : pattern;
var dict = IsStream(pattern) ? pattern.dict : pattern;
var types = [null, this.getTilingPattern,
this.getShadingPattern];
var typeNum = patternDict.get("PatternType");
var types = [null, this.setTilingPattern,
this.setShadingPattern];
var typeNum = dict.get("PatternType");
var patternFn = types[typeNum];
if (!patternFn)
error("Unhandled pattern type");
return patternFn.call(this, pattern, patternDict);
patternFn.call(this, pattern, dict);
},
getShadingPattern: function(pattern) {
var matrix = pattern.get("Matrix");
setShadingPattern: 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;
inv[1] = -matrix[1] * det;
inv[2] = -matrix[2] * det;
inv[3] = matrix[0] * det;
inv[4] = det * (matrix[2] * matrix[5] - matrix[3] * matrix[4]);
inv[5] = det * (matrix[1] * matrix[4] - matrix[0] * matrix[5]);
this.save();
this.transform.apply(this, matrix);
var shading = this.getShading(pattern.get("Shading"));
this.restore();
this.ctx.fillStyle = shading;
return 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);
},
getTilingPattern: function(pattern) {
setTilingPattern: function(pattern, dict) {
function applyMatrix(point, m) {
var x = point[0] * m[0] + point[1] * m[2] + m[4];
var y = point[0] * m[1] + point[1] * m[3] + m[5];
@ -4002,7 +4015,6 @@ var CanvasGraphics = (function() {
};
this.save();
var dict = pattern.dict;
var ctx = this.ctx;
var paintType = dict.get("PaintType");
@ -4075,8 +4087,7 @@ var CanvasGraphics = (function() {
this.restore();
TODO("Inverse pattern is painted");
pattern = this.ctx.createPattern(tmpCanvas, "repeat");
return pattern;
this.ctx.fillStyle = this.ctx.createPattern(tmpCanvas, "repeat");
},
setStrokeGray: function(gray) {
this.setStrokeRGBColor(gray, gray, gray);