Macintosh-SW
/
MacGLide
mirror of https://github.com/jenshemprich/MacGLide.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Improved backward compatibility by supporting non-arb extension GL_EXT_texture_rectangle

This commit is contained in:
Jens Hemprich 2007-08-20 10:50:03 +00:00
parent ab519288c5
commit 86182d2eed
1 changed files with 25 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
MacGLide/OpenGLide/GLExtensions.cpp
View File

@ -83,7 +83,7 @@ stExtensionSupport glNecessaryExt[] =
};
// check to see if Extension is Supported
// code by Mark J. Kilgard of NVidia modified by Fabio Barros
// code by Mark J. Kilgard of NVidia modified by Fabio Barros, improved by Jens-Olaf Hemprich
bool OGLIsExtensionSupported(const char* extensions, const char* extension)
{
char* where = (char *) strchr( extension, ' ' );
@ -115,31 +115,37 @@ bool OGLIsExtensionSupported(const char* extensions, const char* extension)
}
start = terminator;
}
// fix for Rage 128 OpenGL Engine 1.1.ATI-5.99
// (See apple techote TN2014)
if (strcmp(extension, "GL_APPLE_packed_pixels") == 0)
// map ARB to EXT names in order to support older graphics cards
static const int numExtensions = 4;
static const struct
{
return OGLIsExtensionSupported(extensions, "GL_APPLE_packed_pixel");
const char* arbName;
const char* extName;
}
// fix for Rage 128 OpenGL Engine 1.1.ATI-5.99
// support for GL_EXT_texture_env_combine
else if (strcmp(extension, "GL_ARB_texture_env_combine") == 0)
extensionMapping[numExtensions] =
{
return OGLIsExtensionSupported(extensions, "GL_EXT_texture_env_combine");
}
// also support the older GL_EXT_texture_env_add
else if (strcmp(extension, "GL_ARB_texture_env_add") == 0)
// fix for Rage 128 OpenGL Engine 1.1.ATI-5.99
// (See apple techote TN2014)
{"GL_APPLE_packed_pixels","GL_APPLE_packed_pixel"},
// fix for Rage 128 OpenGL Engine 1.1.ATI-5.99
// support for GL_EXT_texture_env_combine
{"GL_ARB_texture_env_combine","GL_EXT_texture_env_combine"},
// also support the older GL_EXT_texture_env_add
{"GL_ARB_texture_env_add","GL_EXT_texture_env_add"},
// and non-ARB texture rectangle extension GL_EXT_texture_rectangle
{"GL_ARB_texture_rectangle","GL_EXT_texture_rectangle"}
};
for(int i = 0; i < numExtensions; i++)
{
return OGLIsExtensionSupported(extensions, "GL_EXT_texture_env_add");
}
else
{
return false;
if (strcmp(extension, extensionMapping[i].arbName) == 0)
{
return OGLIsExtensionSupported(extensions, extensionMapping[i].extName);
}
}
return false;
}
void ValidateUserConfig( void )
void ValidateUserConfig(void)
{
glReportErrors("ValidateUserConfig");