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remove the echo interpreter, dissolve interpreter into gfx and Page

Andreas Gal 14 years ago
parent
bffedbb33c
commit
9521168b5c
2 changed files with 87 additions and 313 deletions
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  1. 397
      pdf.js
  2. 3
      test.html

397
pdf.js
Unescape View File

@ -1797,18 +1797,38 @@ var Page = (function() { @@ -1797,18 +1797,38 @@ var Page = (function() {
? obj
: null);
},
display: function(start, process) {
display: function(gfx) {
var xref = this.xref;
var contents = xref.fetchIfRef(this.contents);
var resources = xref.fetchIfRef(this.resources);
var mediaBox = xref.fetchIfRef(this.mediaBox);
if (!IsStream(contents) || !IsDict(resources))
error("invalid page contents or resources");
start(resources, mediaBox);
gfx.resources = resources;
gfx.beginDrawing({ x: mediaBox[0], y: mediaBox[1],
width: mediaBox[2] - mediaBox[0],
height: mediaBox[3] - mediaBox[1] });
var args = [];
var map = gfx.map;
var parser = new Parser(new Lexer(contents), false);
var obj;
while (!IsEOF(obj = parser.getObj()))
process(obj);
while (!IsEOF(obj = parser.getObj())) {
if (IsCmd(obj)) {
var cmd = obj.cmd;
var fn = map[cmd];
if (fn)
// TODO figure out how to type-check vararg functions
fn.apply(gfx, args);
else
error("Unknown command '" + cmd + "'");
args.length = 0;
} else {
if (args.length > 33)
error("Too many arguments '" + cmd + "'");
args.push(obj);
}
}
gfx.endDrawing();
}
};
@ -1988,312 +2008,6 @@ var PDFDoc = (function() { @@ -1988,312 +2008,6 @@ var PDFDoc = (function() {
return constructor;
})();
var Interpreter = (function() {
function constructor(gfx) {
this.gfx = gfx;
this.map = {
// Graphics state
w: gfx.setLineWidth,
J: gfx.setLineCap,
j: gfx.setLineJoin,
d: gfx.setDash,
ri: gfx.setRenderingIntent,
i: gfx.setFlatness,
q: gfx.save,
Q: gfx.restore,
cm: gfx.transform,
// Path
m: gfx.moveTo,
l: gfx.lineTo,
c: gfx.curveTo,
h: gfx.closePath,
re: gfx.rectangle,
S: gfx.stroke,
f: gfx.fill,
"f*": gfx.eoFill,
B: gfx.fillStroke,
b: gfx.closeFillStroke,
n: gfx.endPath,
// Clipping
W: gfx.clip,
"W*": gfx.eoClip,
// Text
BT: gfx.beginText,
ET: gfx.endText,
Tf: gfx.setFont,
Td: gfx.moveText,
Tm: gfx.setTextMatrix,
Tj: gfx.showText,
TJ: gfx.showSpacedText,
// Type3 fonts
// Color
CS: gfx.setStrokeColorSpace,
cs: gfx.setFillColorSpace,
SC: gfx.setStrokeColor,
SCN: gfx.setStrokeColorN,
sc: gfx.setFillColor,
scn: gfx.setFillColorN,
g: gfx.setFillGray,
RG: gfx.setStrokeRGBColor,
rg: gfx.setFillRGBColor,
// Shading
sh: gfx.shadingFill,
// Images
// XObjects
Do: gfx.paintXObject,
// Marked content
// Compatibility
};
}
constructor.prototype = {
interpret: function(page) {
var gfx = this.gfx;
var map = this.map;
var args = [];
page.display(
function(resources, mediaBox) {
gfx.resources = resources;
gfx.beginDrawing({ x: mediaBox[0], y: mediaBox[1],
width: mediaBox[2] - mediaBox[0],
height: mediaBox[3] - mediaBox[1] });
},
function(obj) {
if (IsCmd(obj)) {
var cmd = obj.cmd;
var fn = map[cmd];
if (fn)
// TODO figure out how to type-check vararg functions
fn.apply(gfx, args);
else
error("Unknown command '" + cmd + "'");
args.length = 0;
} else {
if (args.length > 33)
error("Too many arguments '" + cmd + "'");
args.push(obj);
}
}
);
this.gfx.endDrawing();
}
};
return constructor;
})();
var EchoGraphics = (function() {
function constructor() {
this.out = "";
this.indentation = 0;
this.indentationStr = "";
}
constructor.prototype = {
beginDrawing: function(mediaBox) {
this.printdentln("/MediaBox ["+
mediaBox.x +" "+ mediaBox.y +" "+
mediaBox.width +" "+ mediaBox.height +" ]");
},
endDrawing: function() {
},
// Graphics state
setLineWidth: function(width) {
this.printdentln(width +" w");
},
setLineCap: function(style) {
this.printdentln(style +" J");
},
setLineJoin: function(style) {
this.printdentln(style +" j");
},
setDash: function(dashArray, dashPhase) {
this.printdentln(""+ dashArray +" "+ dashPhase +" d");
},
setRenderingIntent: function(intent) {
this.printdentln("/"+ intent.name + " ri");
},
setFlatness: function(flatness) {
this.printdentln(""+ flatness +" i");
},
save: function() {
this.printdentln("q");
},
restore: function() {
this.printdentln("Q");
},
transform: function(a, b, c, d, e, f) {
this.printdentln(""+ a +" "+ b +" "+ c +
" "+d +" "+ e +" "+ f + " cm");
},
// Path
moveTo: function(x, y) {
this.printdentln(""+ x +" "+ y +" m");
},
lineTo: function(x, y) {
this.printdentln(""+ x +" "+ y +" l");
},
curveTo: function(x1, y1, x2, y2, x3, y3) {
this.printdentln(""+ x1 +" "+ y1 +
" "+ x2 +" "+ y2 +
" "+ x3 +" "+ y3 + " c");
},
closePath: function() {
this.printdentln("h");
},
rectangle: function(x, y, width, height) {
this.printdentln(""+ x +" "+ y + " "+ width +" "+ height +" re");
},
stroke: function() {
this.printdentln("S");
},
fill: function() {
this.printdentln("f");
},
eoFill: function() {
this.printdentln("f*");
},
fillStroke: function() {
this.printdentln("B");
},
closeFillStroke: function() {
this.printdentln("b");
},
endPath: function() {
this.printdentln("n");
},
// Clipping
clip: function() {
this.printdentln("W");
},
eoClip: function() {
this.printdentln("W*");
},
// Text
beginText: function() {
this.printdentln("BT");
this.indent();
},
endText: function() {
this.dedent();
this.printdentln("ET");
},
setFont: function(fontRef, size) {
var font = this.resources.get("Font").get(fontRef.name);
this.printdentln("/"+ font.name +" "+ size +" Tf");
},
moveText: function (x, y) {
this.printdentln(""+ x +" "+ y +" Td");
},
setTextMatrix: function(a, b, c, d, e, f) {
this.printdentln(""+ a +" "+ b +" "+ c +
" "+d +" "+ e +" "+ f + " Tm");
},
showText: function(text) {
this.printdentln("( "+ text +" ) Tj");
},
showSpacedText: function(arr) {
this.printdentln(""+ arr +" TJ");
},
// Type3 fonts
// Color
setStrokeColorSpace: function(space) {
this.printdentln("/"+ space.name +" CS");
},
setFillColorSpace: function(space) {
this.printdentln("/"+ space.name +" cs");
},
setStrokeColor: function(/*...*/) {
this.printdent("");
for (var i = 0; i < arguments.length; ++i)
this.print(""+ arguments[i] +" ");
this.printdentln("SC");
},
setStrokeColorN: function(/*...*/) {
this.printdent("");
for (var i = 0; i < arguments.length; ++i)
this.print(""+ arguments[i] +" ");
this.printdentln("SCN");
},
setFillColor: function(/*...*/) {
this.printdent("");
for (var i = 0; i < arguments.length; ++i)
this.print(""+ arguments[i] +" ");
this.printdentln("sc");
},
setFillColorN: function(/*...*/) {
this.printdent("");
for (var i = 0; i < arguments.length; ++i)
this.print(""+ arguments[i] +" ");
this.printdentln("scn");
},
setFillGray: function(gray) {
this.printdentln(""+ gray +" g");
},
setStrokeRGBColor: function(r, g, b) {
this.printdentln(""+ r +" "+ g +" "+ b +" RG");
},
setFillRGBColor: function(r, g, b) {
this.printdentln(""+ r +" "+ g +" "+ b +" rg");
},
// Shading
shadingFill: function(entry) {
this.printdentln("/"+ entry.name +" sh");
},
// Images
// XObjects
paintXObject: function(obj) {
this.printdentln("/"+ obj.name +" Do");
},
// Marked content
// Compatibility
// Output state
print: function(str) {
this.out += str;
},
println: function(str) {
this.print(str);
this.out += "\n";
},
printdent: function(str) {
this.print(this.indentationStr);
this.print(str);
},
printdentln: function(str) {
this.printdent(str);
this.println("");
},
indent: function() {
this.indentation += 2;
this.indentationStr += " ";
},
dedent: function() {
this.indentation -= 2;
this.indentationStr = this.indentationStr.slice(0, -2);
},
};
return constructor;
})();
// <canvas> contexts store most of the state we need natively.
// However, PDF needs a bit more state, which we store here.
var CanvasExtraState = (function() {
@ -2317,6 +2031,67 @@ var CanvasGraphics = (function() { @@ -2317,6 +2031,67 @@ var CanvasGraphics = (function() {
this.current = new CanvasExtraState();
this.stateStack = [ ];
this.pendingClip = null;
this.map = {
// Graphics state
w: this.setLineWidth,
J: this.setLineCap,
j: this.setLineJoin,
d: this.setDash,
ri: this.setRenderingIntent,
i: this.setFlatness,
q: this.save,
Q: this.restore,
cm: this.transform,
// Path
m: this.moveTo,
l: this.lineTo,
c: this.curveTo,
h: this.closePath,
re: this.rectangle,
S: this.stroke,
f: this.fill,
"f*": this.eoFill,
B: this.fillStroke,
b: this.closeFillStroke,
n: this.endPath,
// Clipping
W: this.clip,
"W*": this.eoClip,
// Text
BT: this.beginText,
ET: this.endText,
Tf: this.setFont,
Td: this.moveText,
Tm: this.setTextMatrix,
Tj: this.showText,
TJ: this.showSpacedText,
// Type3 fonts
// Color
CS: this.setStrokeColorSpace,
cs: this.setFillColorSpace,
SC: this.setStrokeColor,
SCN: this.setStrokeColorN,
sc: this.setFillColor,
scn: this.setFillColorN,
g: this.setFillGray,
RG: this.setStrokeRGBColor,
rg: this.setFillRGBColor,
// Shading
sh: this.shadingFill,
// Images
// XObjects
Do: this.paintXObject,
// Marked content
// Compatibility
};
}
var LINE_CAP_STYLES = [ "butt", "round", "square" ];
@ -2525,7 +2300,7 @@ function runParseTests() { @@ -2525,7 +2300,7 @@ function runParseTests() {
var data = snarf("/tmp/paper.pdf", "binary");
var pdf = new PDFDoc(new Stream(data));
var page = pdf.getPage(1);
page.display();
//page.display();
}
if ("arguments" in this) {

3
test.html
Unescape View File

@ -52,8 +52,7 @@ function displayPage(num) { @@ -52,8 +52,7 @@ function displayPage(num) {
ctx.restore();
var gfx = new CanvasGraphics(ctx);
var interp = new Interpreter(gfx);
interp.interpret(page);
page.display(gfx);
}
function nextPage() {

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