• Announcements

    • khawk

      Download the Game Design and Indie Game Marketing Freebook   07/19/17

      GameDev.net and CRC Press have teamed up to bring a free ebook of content curated from top titles published by CRC Press. The freebook, Practices of Game Design & Indie Game Marketing, includes chapters from The Art of Game Design: A Book of Lenses, A Practical Guide to Indie Game Marketing, and An Architectural Approach to Level Design. The GameDev.net FreeBook is relevant to game designers, developers, and those interested in learning more about the challenges in game development. We know game development can be a tough discipline and business, so we picked several chapters from CRC Press titles that we thought would be of interest to you, the GameDev.net audience, in your journey to design, develop, and market your next game. The free ebook is available through CRC Press by clicking here. The Curated Books The Art of Game Design: A Book of Lenses, Second Edition, by Jesse Schell Presents 100+ sets of questions, or different lenses, for viewing a game’s design, encompassing diverse fields such as psychology, architecture, music, film, software engineering, theme park design, mathematics, anthropology, and more. Written by one of the world's top game designers, this book describes the deepest and most fundamental principles of game design, demonstrating how tactics used in board, card, and athletic games also work in video games. It provides practical instruction on creating world-class games that will be played again and again. View it here. A Practical Guide to Indie Game Marketing, by Joel Dreskin Marketing is an essential but too frequently overlooked or minimized component of the release plan for indie games. A Practical Guide to Indie Game Marketing provides you with the tools needed to build visibility and sell your indie games. With special focus on those developers with small budgets and limited staff and resources, this book is packed with tangible recommendations and techniques that you can put to use immediately. As a seasoned professional of the indie game arena, author Joel Dreskin gives you insight into practical, real-world experiences of marketing numerous successful games and also provides stories of the failures. View it here. An Architectural Approach to Level Design This is one of the first books to integrate architectural and spatial design theory with the field of level design. The book presents architectural techniques and theories for level designers to use in their own work. It connects architecture and level design in different ways that address the practical elements of how designers construct space and the experiential elements of how and why humans interact with this space. Throughout the text, readers learn skills for spatial layout, evoking emotion through gamespaces, and creating better levels through architectural theory. View it here. Learn more and download the ebook by clicking here. Did you know? GameDev.net and CRC Press also recently teamed up to bring GDNet+ Members up to a 20% discount on all CRC Press books. Learn more about this and other benefits here.
Sign in to follow this  
Followers 0
sitedude

Blob (Bmp 5-5-5) Image help needed

6 posts in this topic

I am trying to find a simple way to replace images on an Innotab (kids vtech device)

The images are stored in a SQLite database in Blob Format.

The images are Bmp 5-5-5 (without a header)

I am able to view them using an AutoIT script

[url="http://pastebin.com/v2dyRyBG"]http://pastebin.com/v2dyRyBG[/url]

The above link is the auto it script

the [b]"SELECT thumbnail FROM Games_info where pkey='3'"[/b] pulls the blob file from the database

Here is the blob file I saved directly from the database

[url="http://wikisend.com/download/239802/blobthumbnail"]http://wikisend.com/download/239802/blobthumbnail[/url]

Does anyone know an easy way to possible edit this blob file? Or a way I can make a 57x57 a 5-5-5 bmp blob without a header so i can insert it into the SQLite db?
0

Share this post


Link to post
Share on other sites
The file contains two dwords with width and height, and then the plain image data (2 bytes per pixel).

If you don't have a program that can work with that kind of data, the simplest way would be to write a programm to append/remove a image header of a format than can store that data.

I'd suggest BMP or TGA, both allow the pixel data in exactly that format.
1

Share this post


Link to post
Share on other sites
Thats a great idea! Would Paint Brush do the trick? I have Gimp also. I heard that the header of a bmp is the first 54 bytes. So If I some how made a 5-5-5 image then used a hex editor to remove the first 54 bytes that would work?

Can you recommend a program to save in bmp 555 format?
0

Share this post


Link to post
Share on other sites
Also I think I could use this command to trim the first 54 on a modified image

tail -c +54 image > image2
0

Share this post


Link to post
Share on other sites
The problem is that most paint programs do not cater to 16 bit 5-5-5 (or 5-6-5 ) color depth.

Here, try this, it's a hex dump of 16bit bitmap header for a 57x57 image. Since you seem to do Linux/Unix I think you can use one of the shell tools to convert it to binary. The problem I fear is that bitmaps do use padding (4 bytes per line), so that probably won't work.

42 4D 0A 1A 00 00 00 00 00 00 36 00 00 00 28 00
00 00 39 00 00 00 39 00 00 00 01 00 10 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 Edited by Endurion
1

Share this post


Link to post
Share on other sites
[quote name='Endurion' timestamp='1354996359' post='5008580']
The problem I fear is that bitmaps do use padding (4 bytes per line), so that probably won't work.
[/quote]
Just 'cause I'm curious, are you saying every bitmap format aligns each line of pixels to 4 bytes?
Or that, regardless of the length of a line, there are 4 empty bytes at the end of each one?

And is the first bit or the last bit of a 16-bit 555 bitmap pixel the ignored bit?
0

Share this post


Link to post
Share on other sites
[quote name='Servant of the Lord' timestamp='1355000105' post='5008599']
[quote name='Endurion' timestamp='1354996359' post='5008580']
The problem I fear is that bitmaps do use padding (4 bytes per line), so that probably won't work.
[/quote]
Just 'cause I'm curious, are you saying every bitmap format aligns each line of pixels to 4 bytes?
Or that, regardless of the length of a line, there are 4 empty bytes at the end of each one?

And is the first bit or the last bit of a 16-bit 555 bitmap pixel the ignored bit?
[/quote]

Not every bitmap format, only the Windows BMP format AFAIK.

Every line of pixels is padded to a full multiple of four bytes. The padding bytes are added at the end of a line. 16-bit bitmaps are always stored as 5-5-5, xRRRRRGGGGGBBBBB, unless the color masks in the header say otherwise. For simplicity sake the color masks in the sample hex dump are set to 0, then xRRRRRGGGGGBBBBB is the default. Edited by Endurion
1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0