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Package: devil-1.7.99.tar.gz [view]
Upload User: wmy0603
Upload Date: 2022-05-02
Package Size: 1808k
Code Size: 5k
Category:
Compress-Decompress algrithms
Development Platform:
Visual C++
- Developer's Image Library version 1.7.8 Readme, Notes and Quick Use
- -------------------------------------------------------------------
- <DZA[afk]> DevIL song: "la la la, a cross-platform image library utilizing a
- simple syntax to load, save, convert, manipulate, filter and display
- a variety of images with ease, la la la"
- What is it?
- -----------
- DevIL is an Open Source image library whose distribution is done under the
- terms of the GNU LGPL license. See the COPYING file for more details.
- DevIL offers you a simple way to implement loading, manipulating, filtering,
- converting, displaying, saving from/to several different image formats in your
- own project.
- Where can I find it?
- --------------------
- DevIL can be found at http://openil.sourceforge.net
- How do I build and install the 3 libraries ?
- -----------------------------------------
- *nix users should read README.unix
- VisualC users should read README.win
- Cygwin users should read README.cygwin
- MacOSX users should read README.macosx
- PS: *nix stands for GNU/Linux, *BSD, SunOS/Solaris and perhaps some more.
- More Extensive Documentation
- ----------------------------
- This file is only a quick guide to point you to more detailed information on
- how to use DevIL. More extensive documentation can currently be found on the
- DevIL site at http://openil.sf.net and in the /Docs directory in a normal
- install.
- Why the hell another image library?
- -----------------------------------
- I have never seen an image library that can do everything DevIL does. Sure,
- various different libraries can do part of what DevIL can do as well or even
- better, but I wanted a simple to use library that encompassed all of these
- features. I also wanted an extremely portable image library that could be used
- from a variety of languages and utilized the OpenGL syntax.
- Basic Readme
- ------------
- Most anything stated in this document applies to DevIL as well as DevILU and
- DevILUT, unless otherwise stated. (This file is best viewed with word wrap on.)
- Errors:
- -------
- All errors generated inside DevIL, along with illegal parameters passed to
- DevIL functions are caught and passed to ilSetError(), an internal library
- function. The calling program can call ilGetError() to get the value of the
- error generated. Error types are defined in il.h, using the 0x501 - 0x5FF
- range. ilGetError() will return 0 (IL_NO_ERROR) if no error has occurred.
- Basic Usage:
- ------
- This demonstrates loading an image through DevIL for OpenGL. Don't forget to
- call ilInit before you before you do anything:
- #include <IL/il.h>
- #include <IL/ilu.h>
- #include <IL/ilut.h>
- ...
- ILuint devilError;
- ilInit();
- devilError = ilGetError();
- if (devilError != IL_NO_ERROR) {
- printf ("Devil Error (ilInit: %sn", iluGetErrorString (devilError));
- exit (2);
- }
- ....
- ILuint devilID;
- ilGenImages(1, &devilID);
- ilBindImage(devilID);
- ilLoadImage("default1.tga"); // Loads into the current bound image
- devilError = ilGetError();
- if (devilError != IL_NO_ERROR) {
- printf ("Devil Error (ilLoadImage: %sn", iluGetErrorString (devilError));
- exit (2);
- }
- ....
- ilutRenderer(IL_OPENGL); // Switch the renderer
- ....
- GLuint openglID, openglError;
- openglID = ilutGLBindTexImage(); // This generates the texture for you
- devilError = ilGetError();
- if (devilError != IL_NO_ERROR) {
- printf ("Error: %sn", iluGetErrorString (devilError));
- exit (2);
- }
- if (openglError != GL_NO_ERROR) {
- printf ("Opengl Error (ilutGLBindTexImage): %sn", gluGetErrorString (openglError));
- exit (2);
- }
- // Make sure to close the image when you are done with it (though DevIL
- // automatically deletes them when the program exits):
- glDeleteTextures(1, &openglID);
- ilDeleteImages (1, &devilID);
- More Examples:
- ---------
- The TestIL project is included to test features of DevIL.
- DevIL includes a project called GLTest. This is a simple test of DevIL's
- capabilities. All it does it load any image and displays it in a window
- created by FreeGlut, which is available on http://freeglut.sourceforge.net. It
- is also included to let the user have an idea of what the library can really
- be used for.
- Several other test projects are included to test support with various display
- APIs. The WindowsTest project is a basic image program that only runs in
- Windows right now but showcases several of DevIL's features through various
- menus.
- If you want more in-depth tutorials, you can find them on
- http://openil.sf.net, or they may be in your installation under the /examples
- directory. Documents are also available in the /docs directory.
- Additional Reading
- ------------------
- All image formats used in DevIL have corresponding documents on
- http://www.wotsit.org, under the Graphics Files section. These documents
- proved invaluable for the creation of this library when there was no library
- already available for that image format.
- Legalese
- --------
- All contents of this file are intellectual property of Denton Woods,
- copyright 2001-2008.