Apply bounding box before using shading patterns.

Fixes #8092

src/core/pattern.js

@@ -96,6 +96,12 @@ Shadings.RadialAxial = (function RadialAxialClosure() {
     var cs = dict.get('ColorSpace', 'CS');
     cs = ColorSpace.parse(cs, xref, res, pdfFunctionFactory);
     this.cs = cs;
+    const bbox = dict.getArray('BBox');
+    if (Array.isArray(bbox) && bbox.length === 4) {
+      this.bbox = Util.normalizeRect(bbox);
+    } else {
+      this.bbox = null;
+    }
 
     var t0 = 0.0, t1 = 1.0;
     if (dict.has('Domain')) {
@@ -213,7 +219,7 @@ Shadings.RadialAxial = (function RadialAxialClosure() {
         }
       }
 
-      return ['RadialAxial', type, this.colorStops, p0, p1, r0, r1];
+      return ['RadialAxial', type, this.bbox, this.colorStops, p0, p1, r0, r1];
     },
   };
 
@@ -719,7 +725,12 @@ Shadings.Mesh = (function MeshClosure() {
     this.matrix = matrix;
     this.shadingType = dict.get('ShadingType');
     this.type = 'Pattern';
-    this.bbox = dict.getArray('BBox');
+    const bbox = dict.getArray('BBox');
+    if (Array.isArray(bbox) && bbox.length === 4) {
+      this.bbox = Util.normalizeRect(bbox);
+    } else {
+      this.bbox = null;
+    }
     var cs = dict.get('ColorSpace', 'CS');
     cs = ColorSpace.parse(cs, xref, res, pdfFunctionFactory);
     this.cs = cs;

src/display/pattern_helper.js

@@ -17,17 +17,30 @@ import { FormatError, info, Util } from '../shared/util';
 
 var ShadingIRs = {};
 
+function applyBoundingBox(ctx, bbox) {
+  if (!bbox || typeof Path2D === 'undefined') {
+    return;
+  }
+  const width = bbox[2] - bbox[0];
+  const height = bbox[3] - bbox[1];
+  const region = new Path2D();
+  region.rect(bbox[0], bbox[1], width, height);
+  ctx.clip(region);
+}
+
 ShadingIRs.RadialAxial = {
   fromIR: function RadialAxial_fromIR(raw) {
     var type = raw[1];
-    var colorStops = raw[2];
+    var bbox = raw[2];
-    var p0 = raw[3];
+    var colorStops = raw[3];
-    var p1 = raw[4];
+    var p0 = raw[4];
-    var r0 = raw[5];
+    var p1 = raw[5];
-    var r1 = raw[6];
+    var r0 = raw[6];
+    var r1 = raw[7];
     return {
       type: 'Pattern',
       getPattern: function RadialAxial_getPattern(ctx) {
+        applyBoundingBox(ctx, bbox);
         var grad;
         if (type === 'axial') {
           grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]);
@@ -233,11 +246,12 @@ ShadingIRs.Mesh = {
     var figures = raw[4];
     var bounds = raw[5];
     var matrix = raw[6];
-    // var bbox = raw[7];
+    var bbox = raw[7];
     var background = raw[8];
     return {
       type: 'Pattern',
       getPattern: function Mesh_getPattern(ctx, owner, shadingFill) {
+        applyBoundingBox(ctx, bbox);
         var scale;
         if (shadingFill) {
           scale = Util.singularValueDecompose2dScale(ctx.mozCurrentTransform);

test/pdfs/.gitignore

@@ -14,6 +14,7 @@
 !issue3214.pdf
 !issue4665.pdf
 !issue4684.pdf
+!issue8092.pdf
 !issue5256.pdf
 !issue5801.pdf
 !issue5946.pdf

test/pdfs/issue8092.pdf

@@ -0,0 +1,151 @@
+%PDF-1.5
+%Çì<C387>¢
+5 0 obj
+<</Length 6 0 R/Filter /FlateDecode>>
+stream
+xœUÌË‚0Ðý|Å]ê°@,Å q)ôHyÕ`ËËÈçÛÆ•¹ÉÌd&gf0œl~U¾((ô«m)ä”V©ÉÝxÆ‘Æ!––:»èi¦Š\XÆB°¢#E~ÈÁcˆ†ç]Õ#ª¡n”î¡4Ê[Ž‹Í‚jªe{Oò¢ÄOÒŒÁs,ú¨m@±OF·zsþ®·v™ÌXoÊh\ßZºÁÙBÐÃæ,²6åendstream
+endobj
+6 0 obj
+166
+endobj
+4 0 obj
+<</Type/Page/MediaBox [0 0 595 842]
+/Rotate 0/Parent 3 0 R
+/Resources<</ProcSet[/PDF /Text]
+/ColorSpace 13 0 R
+/ExtGState 14 0 R
+/Pattern 15 0 R
+/Shading 16 0 R
+/Font 17 0 R
+>>
+/Contents 5 0 R
+>>
+endobj
+3 0 obj
+<< /Type /Pages /Kids [
+4 0 R
+] /Count 1
+>>
+endobj
+1 0 obj
+<</Type /Catalog /Pages 3 0 R
+/Metadata 18 0 R
+>>
+endobj
+7 0 obj
+<</Type/ExtGState
+/OPM 1>>endobj
+8 0 obj
+[/Pattern]
+endobj
+13 0 obj
+<</R8
+8 0 R>>
+endobj
+14 0 obj
+<</R7
+7 0 R>>
+endobj
+15 0 obj
+<</R9
+9 0 R>>
+endobj
+9 0 obj
+<</PatternType 2
+/Shading 10 0 R
+/Matrix[1
+0
+0
+1
+0
+0]>>endobj
+16 0 obj
+<</R10
+10 0 R>>
+endobj
+10 0 obj
+<</ShadingType 2
+/ColorSpace/DeviceRGB
+/BBox[72
+72
+540
+720]
+/Coords[216
+216
+396
+576]
+/Function 11 0 R
+/Extend [true false]>>endobj
+17 0 obj
+<</R12
+12 0 R>>
+endobj
+11 0 obj
+<</FunctionType 2
+/Domain[0
+1]
+/C0[1
+0
+1]
+/C1[0
+1
+1]
+/N 1>>endobj
+12 0 obj
+<</BaseFont/Courier-Bold/Type/Font
+/Subtype/Type1>>
+endobj
+18 0 obj
+<</Type/Metadata
+/Subtype/XML/Length 1371>>stream
+<?xpacket begin='' id='W5M0MpCehiHzreSzNTczkc9d'?>
+<?adobe-xap-filters esc="CRLF"?>
+<x:xmpmeta xmlns:x='adobe:ns:meta/' x:xmptk='XMP toolkit 2.9.1-13, framework 1.6'>
+<rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#' xmlns:iX='http://ns.adobe.com/iX/1.0/'>
+<rdf:Description rdf:about='uuid:5f8db3e5-1ae5-11e4-0000-a95b86321679' xmlns:pdf='http://ns.adobe.com/pdf/1.3/' pdf:Producer='GPL Ghostscript 9.06'/>
+<rdf:Description rdf:about='uuid:5f8db3e5-1ae5-11e4-0000-a95b86321679' xmlns:xmp='http://ns.adobe.com/xap/1.0/'><xmp:ModifyDate>2014-07-31T04:08:37-04:00</xmp:ModifyDate>
+<xmp:CreateDate>2014-07-31T04:08:37-04:00</xmp:CreateDate>
+<xmp:CreatorTool>Henry McGilton for Adobe Systems Incorporated</xmp:CreatorTool></rdf:Description>
+<rdf:Description rdf:about='uuid:5f8db3e5-1ae5-11e4-0000-a95b86321679' xmlns:xapMM='http://ns.adobe.com/xap/1.0/mm/' xapMM:DocumentID='uuid:5f8db3e5-1ae5-11e4-0000-a95b86321679'/>
+<rdf:Description rdf:about='uuid:5f8db3e5-1ae5-11e4-0000-a95b86321679' xmlns:dc='http://purl.org/dc/elements/1.1/' dc:format='application/pdf'><dc:title><rdf:Alt><rdf:li xml:lang='x-default'>Ash02.ps</rdf:li></rdf:Alt></dc:title></rdf:Description>
+</rdf:RDF>
+</x:xmpmeta>
+                                                                        
+                                                                        
+<?xpacket end='w'?>
+endstream
+endobj
+2 0 obj
+<</Producer(GPL Ghostscript 9.06)
+/CreationDate(D:20140731040837-04'00')
+/ModDate(D:20140731040837-04'00')
+/Title(Ash02.ps)
+/Creator(Henry McGilton for Adobe Systems Incorporated)>>endobj
+xref
+0 19
+0000000000 65535 f 
+0000000540 00000 n 
+0000002627 00000 n 
+0000000481 00000 n 
+0000000270 00000 n 
+0000000015 00000 n 
+0000000251 00000 n 
+0000000605 00000 n 
+0000000646 00000 n 
+0000000762 00000 n 
+0000000864 00000 n 
+0000001036 00000 n 
+0000001111 00000 n 
+0000000672 00000 n 
+0000000702 00000 n 
+0000000732 00000 n 
+0000000832 00000 n 
+0000001004 00000 n 
+0000001179 00000 n 
+trailer
+<< /Size 19 /Root 1 0 R /Info 2 0 R
+/ID [<DBD6B1FC3282E2424AD4E053FFD653D0><DBD6B1FC3282E2424AD4E053FFD653D0>]
+>>
+startxref
+2823
+%%EOF

test/test_manifest.json

@@ -654,6 +654,12 @@
        "type": "eq",
        "about": "Type1 font with |Ref|s in the Differences array of the Encoding dictionary."
     },
+    {  "id": "issue8092",
+       "file": "pdfs/issue8092.pdf",
+       "md5": "e4f3376b35fd132580246c3db1fbd738",
+       "rounds": 1,
+       "type": "eq"
+    },
     {  "id": "franz_2",
        "file": "pdfs/franz_2.pdf",
        "md5": "9d301ed8816e879891115b5cc3c39559",