lsm/PdfPig
1
0
Fork 0
mirror of https://github.com/UglyToad/PdfPig.git synced 2025-09-20 03:17:57 +08:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

#55 move support for images to page and add inline images

Browse Source 
support both xobject and inline images. adds unsupported filters so that exceptions are only thrown when accessing lazily evaluated image.bytes property rather than when opening the page.

treat all warnings as errors.
This commit is contained in:
Eliot Jones
2019-10-08 14:04:36 +01:00
parent e02e130947
commit 68bcaf3901
41 changed files with 1083 additions and 169 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
src/UglyToad.PdfPig/Content/PageContent.cs
View File

@@ -1,14 +1,17 @@
namespace UglyToad.PdfPig.Content
{
using System;
using System.Collections.Generic;
using Filters;
using Graphics;
using Graphics.Operations;
using Tokenization.Scanner;
using XObjects;
using UglyToad.PdfPig.Geometry;
using Geometry;
using Util;
/// <summary>
///
/// Wraps content parsed from a page content stream for access.
/// </summary>
/// <remarks>
/// This should contain a replayable stack of drawing instructions for page content
@@ -16,36 +19,46 @@
/// </remarks>
internal class PageContent
{
private readonly IReadOnlyDictionary<XObjectType, List<XObjectContentRecord>> xObjects;
private readonly IReadOnlyList<Union<XObjectContentRecord, InlineImage>> images;
private readonly IPdfTokenScanner pdfScanner;
private readonly XObjectFactory xObjectFactory;
private readonly IFilterProvider filterProvider;
private readonly IResourceStore resourceStore;
private readonly bool isLenientParsing;
internal IReadOnlyList<IGraphicsStateOperation> GraphicsStateOperations { get; }
public IReadOnlyList<Letter> Letters { get; }
public IReadOnlyList<PdfPath> Paths { get; }
internal PageContent(IReadOnlyList<IGraphicsStateOperation> graphicsStateOperations, IReadOnlyList<Letter> letters, List<PdfPath> paths,
IReadOnlyDictionary<XObjectType, List<XObjectContentRecord>> xObjects,
internal PageContent(IReadOnlyList<IGraphicsStateOperation> graphicsStateOperations, IReadOnlyList<Letter> letters,
IReadOnlyList<PdfPath> paths,
IReadOnlyList<Union<XObjectContentRecord, InlineImage>> images,
IPdfTokenScanner pdfScanner,
XObjectFactory xObjectFactory,
IFilterProvider filterProvider,
IResourceStore resourceStore,
bool isLenientParsing)
{
GraphicsStateOperations = graphicsStateOperations;
Letters = letters;
Paths = paths;
this.xObjects = xObjects;
this.pdfScanner = pdfScanner;
this.xObjectFactory = xObjectFactory;
this.images = images;
this.pdfScanner = pdfScanner ?? throw new ArgumentNullException(nameof(pdfScanner));
this.filterProvider = filterProvider ?? throw new ArgumentNullException(nameof(filterProvider));
this.resourceStore = resourceStore ?? throw new ArgumentNullException(nameof(resourceStore));
this.isLenientParsing = isLenientParsing;
}
public IEnumerable<XObjectImage> GetImages()
public IEnumerable<IPdfImage> GetImages()
{
foreach (var contentRecord in xObjects[XObjectType.Image])
foreach (var image in images)
{
yield return xObjectFactory.CreateImage(contentRecord, pdfScanner, isLenientParsing);
IPdfImage result = null;
image.Match(x => { result = XObjectFactory.ReadImage(x, pdfScanner, filterProvider, resourceStore, isLenientParsing); },
x => { result = x; });
yield return result;
}
}
}