Delphi OpenGL Community - OpenGL 1.5-Header

Delphi OpenGL1.5-Header -Readme-

(obtained and maintained through www.delphigl.com)

This is the readme for the OpenGL1.5-Headers for Delphi that has been developed by DGL's OpenGL2.0-Portteam. Please read carefully through this file before using the header to avoid common problems and faults.

Description :

OpenGL 1.5-Header for Borland Delphi 4 and above (tested with Delphi 7).
Containts the translations of glext.h, gl_1_1.h, glu.h and weglext.h.
It also contains some helperfunctions that were inspired by those found in Mike Lischke's OpenGL12.pas.

Also contains the new OpenGL1.5-Extensions :

GL_ARB_occlusion_query (Specs)

GL_ARB_shader_objects (Specs)

GL_ARB_vertex_shader (Specs)

GL_ARB_fragment_shader (Specs)

GL_ARB_shading_language_100 (Specs)

GL_ARB_texture_non_power_of_two (Specs)

GL_ARB_point_sprite (Specs)

How to use :

Before you can use any of the gl-functions contained in the header, you'll have to call InitOpenGL to initialize the functionpointers. In your app it should look something like that :

procedure MyGLInit;
begin
InitOpenGL; // Don't forget, or first gl-Call will result in an access violation!
MyDC := GetDC(...);
MyRC := CreateRenderingContext(...);
ActivateRenderingContext(MyDC, MyRC); // Necessary, will also read some extension
...
end;

After doing the above initialisation, you're ready to use all OpenGL-Functions and extensions your card supports. And also don't forget to release your context properly when exiting :

procedure MyDeInit;
begin
DeactivateRenderingContext; // Deactivates the current context
wglDeleteContext(myRC);
ReleaseDC(Handle, myDC);
end;

If you have any problems concerning the how-to use of this header, just download the according Template, where you'll see how to exactly write a simple gl app with our header.

Support :

If you have problems, want to ask a question or think you may have encountered a bug in the header, please feel free to use the support-threads in our forums :
English support
German support

History :

Version 1.0 - Initial Release

Version 1.1 - Added PPointer in Tpyessection for compatiblity with Delphi
              versions lower than 7                                    (SW)
            - Added a function named RaiseLastOSError including a comment
              on how to make it run under Delphi versions lower than 7 (SW)
            - Added some data types according to the GL-Syntax         (SW)

Version 1.2 - Fixed some problems with getting the addresses of some
              Extensions (e.g. glTexImage3D) where the EXT/ARB did work
              but not the core-functions                               (SW)

Version 1.3 - A second call to ReadimplementationProperties won't
              revert to the default libs anymore                       (MW)
            - Libraries now will be released if necessary              (MW)

Credits :

Converted and maintained by DGL's GL2.0-Team :
Sascha Willems (Son of Satan, http://www.delphigl.de)
Steffen Xonna (LossyEx, http://www.dev-center.de)
Lars Middendorf (http://www.3d-seite.de)
Additional input :
Martin Waldegger (Mars, http://www.martinscad.cjb.net)

Copyright :

The contents of this file are used with permission, subject to
the Mozilla Public License Version 1.1 (the "License"); you may
not use this file except in compliance with the License. You may
obtain a copy of the License at
http://www.mozilla.org/MPL/MPL-1.1.html

Software distributed under the License is distributed on an
"AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
implied. See the License for the specific language governing
rights and limitations under the License.