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Lua Game Development Cookbook

You're reading from   Lua Game Development Cookbook Over 70 recipes that will help you master the elements and best practices required to build a modern game engine using Lua

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Product type Paperback
Published in Jul 2015
Publisher
ISBN-13 9781849515504
Length 360 pages
Edition 1st Edition
Languages
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Author (1):
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Mário Kašuba Mário Kašuba
Author Profile Icon Mário Kašuba
Mário Kašuba
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Toc

Table of Contents (11) Chapters Close

Preface 1. Basics of the Game Engine 2. Events FREE CHAPTER 3. Graphics – Common Methods 4. Graphics – Legacy Method with OpenGL 1.x–2.1 5. Graphics – Modern Method with OpenGL 3.0+ 6. The User Interface 7. Physics and Game Mechanics 8. Artificial Intelligence 9. Sounds and Networking Index

Creating surfaces


Surfaces are an object representation of image data buffers. They play the main role in the texture management process. Every image you load needs to be placed onto the surface first. After this, you can use this surface to render your image onto the screen, store it into graphical memory, or do some image manipulation.

Getting ready

Every surface consists of a pixel format description and binary data. The surface object structure is shown in the following table:

Field names

Description

flags

This is the bit mask description of surface properties.

format

This is the surface pixel format.

w

This is the surface width in pixels.

h

This is the surface height in pixels.

pitch

This is the length of the surface scanline in bytes. It specifies how many bytes are used to store a single line surface content and it's used mostly in surface blitting operations. The pitch value is always dividable by 4 to optimize surface processing speed.

pixels

This is the pointer...

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