Horizontal lines and PDF drawing on iPhone/iPad Quartz 2D

Posted by aron on Stack Overflow See other posts from Stack Overflow or by aron
Published on 2010-04-06T00:34:59Z Indexed on 2010/04/06 0:43 UTC
Read the original article Hit count: 783

Filed under:

iphone

|

quartz

|

graphics

|

horizontal

|

lines

I'm trying to display a PDF of music using the Quartz 2D calls:

CGPDFDocumentGetPage and CGPDFPageGetDrawingTransform

The problem is that some horizontal lines in the PDF get drawn thicker than others. The biggest problem is that I notice this in Preview on the Mac and on iPhone/iPad. Even when viewing this PDF in the iPhone/iPad mail, I get the same problem.

Here is the example: http://aronnelson.com/problem/pdfproblem.jpg

Note that the PDF on the left is preview, the PDF on the right is the same file but in Google Docs. See how clean the Google Docs version is?

Is there any way to fix this problem? Would it help to draw the PDF larger and zoom down using a UIScrollView?

Any help appreciated. I can't find much info re: this problem.

Aron

© Stack Overflow or respective owner

Related posts about iphone

iphone - direct link to iPhone review form from inside iphone

as seen on Stack Overflow - Search for 'Stack Overflow'
I am trying to link directly to the review link of one of my Apps. I know that it is possible because Appirater did it in the past, but some change in iTunes turned the API down. Appirater uses this URL NSString *templateReviewURL = @"itms-apps://itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews… >>> More
Buy iPhone 4 Without Contract: $599 (AT&T) and $699 (Verizon)

as seen on Tech Dreams - Search for 'Tech Dreams'
Purchasing iPhone without a contract is a good option when you are planning to gift it to someone or going to use it outside US. Both AT&T and Verizon lets you iPhone 4 without a contract but this information is buried deep under blurred text in FAQs and agreements. Here is the pricing… >>> More
Is it possible to download and run IPhone apps on an IPhone emulator

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am tasked to provide an IPhone client app for our SaaS website. I have never written an IPhone application, nor do I have an IPhone at the moment. Before I can decide whether or not I want to do this myself or outsource this, I'd like to try a few apps myself to get a feeling for the UI. Is… >>> More
iPhone web app from dashcode rss feed template works deployed on simulator but not on iphone

as seen on Stack Overflow - Search for 'Stack Overflow'
iPhone web app from dashcode rss feed template works deployed on simulator but not on iphone. The web app is deployed at; http://www.alila.se/wordpress/index.html If i run the simulator and enter that adress, it fetches the rss feed and displays it. Everything fine. When i enter the adress into… >>> More
Problem running iPhone application on iPhone from Xcode (and in Instruments)

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi I have a problem running one application on the iPhone from Xcode (or Instruments). When I try to run the app I get the error message Failed to upload XXX.app in the bottom left corner of Xcode. The strange thing is it actually uploaded the app to the iPhone but it doesn't start it (after this… >>> More

Related posts about quartz

Quartz.Net Writing your first Hello World Job

as seen on Geeks with Blogs - Search for 'Geeks with Blogs'
In this blog post I’ll be covering, 01: A few things to consider before you should schedule a Job using Quartz.Net 02: Setting up your solution to use Quartz.Net API 03: Quartz.Net configuration 04: Writing & scheduling a hello world job with Quartz.Net If you are new to Quartz… >>> More
Install Quartz.Net as a windows service and Test installation

as seen on Geeks with Blogs - Search for 'Geeks with Blogs'
In this blog post I’ll be covering, 01: Where to download Quartz.net from 02: How to install Quartz.net as a Windows service 03: Test the Quartz.net Installation If you are new to Quartz.net I would recommend reading the blog post on a brief introduction to Quartz.net. 01 – Where… >>> More
JBoss Seam - Quartz - single Quartz instance shared between 2 web applications

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi all, Is it possible to have a single Quartz scheduler using its own datasource that can be shared between web applications? Thanks, Walter >>> More
using quartz with out the quartz plugin in grails

as seen on Stack Overflow - Search for 'Stack Overflow'
i'm trying to use quartz to schedule jobs in grails with out using the plugin. this is the code: RunMeTask.java package tt; public class RunMeTask { public void printMe() { System.out.println("Run Me ~"); }} resources.groovy (under conf/spring) import org.springframework.scheduling.quartz.JobDetailFactoryBean; import… >>> More
Quartz.Net Windows Service Configure Logging

as seen on Geeks with Blogs - Search for 'Geeks with Blogs'
In this blog post I’ll be covering, Logging for Quartz.Net Windows Service 01 – Why doesn’t Quartz.Net Windows Service log by default 02 – Configuring Quartz.Net windows service for logging to eventlog, file, console, etc 03 – Results: Logging in action … >>> More