Reading the properties of a PNG image

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Reading the properties of a PNG image

chuacw

Wed, 7 Oct 2020 @ 12:31 PM

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How do you read and write to the properties of a PNG image?

Let the following image show you how.

Delphi

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Chee Wee's discoveries and tech blog

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Chee Wee's discoveries and tech blog

Bluetooth discovery on Android with Delphi

Posted over 10 years ago

by chuacw
- 0 Comments
With the BroadcastReceiver plugin , it is easy to write a Bluetooth discovery application with Delphi. Drop the BroadcastReceiver component onto the form...
Chee Wee's discoveries and tech blog

Undocumented Delphi directives to set PE OS headers

Posted over 10 years ago

by chuacw
- 0 Comments
I recently stumbled across undocumented Delphi directives that were used to set the PE OS headers. They are as follows: Compiler directive usage SETPEOSVERSION...
Chee Wee's discoveries and tech blog

Meeting fellow entrepreneurs at a VC funding talk...

Posted over 12 years ago

by chuacw
- 1 Comments
I was at Fusionopolis this morning, attending a Venture Capital (VC) funding talk, and met some entrepreneurs. Roger Yuen of Clozette , talked about how...
Chee Wee's discoveries and tech blog

The genesis for FixAndroidLogger: fixing a RAD Studio mistake.

Posted over 4 years ago

by chuacw
- 0 Comments
When FireMonkey became available for Android, one of the things I looked at was how logging was done. The API to Android logging are located in Androidapi...
Chee Wee's discoveries and tech blog

Using ICMP and SNMP to detect the dynamic IP address of your router

Posted over 20 years ago

by chuacw
- 4 Comments
The following Delphi code uses ICMP and SNMP to detect the dynamic IP address of your router when it is connected to a WAN. It first gets the IP address...
Chee Wee's discoveries and tech blog

Things to do before upgrading an Android phone

Posted over 8 years ago

by chuacw
- 0 Comments
The things to do before upgrading an Android phone, or changing the firmware on your Android phone: Enable ADB debugging Turn on USB and mobile network...
Chee Wee's discoveries and tech blog

Reverse engineering software - ChatJet

Posted over 12 years ago

by chuacw
- 0 Comments
Many years ago, around 2003-2004, I stumbled upon ChatJet when Borland used it for its online chat. I was fascinated by the software, which allowed users...
Chee Wee's discoveries and tech blog

A self-contained TypeScript library demo

Posted over 3 years ago

by chuacw
- 0 Comments
In case I forget, I've created a self-contained TypeScript library demo on my Github repo. It's a simple TypeScript project, and very minimal....
Chee Wee's discoveries and tech blog

Aligning a record or a native type declared on the stack/heap with Delphi

Posted over 4 years ago

by chuacw
- 0 Comments
A method to design records so that they're allocated on a specific byte boundary, such as 16 bytes, 512 bytes, 4096 bytes, etc.
...
Chee Wee's discoveries and tech blog

Look where I passed by today!

Posted over 16 years ago

by chuacw
- 1 Comments
I'm currently in San Jose, and I have been commuting between San Jose and Cupertino for the past 3 weeks...