/**
* Either enable or disable the named extension.
* \return GL_TRUE for success, GL_FALSE if invalid extension name
*/
static GLboolean
set_extension( struct gl_context *ctx, const char *name, GLboolean state )
{
size_t offset;
if (ctx->Extensions.String) {
/* The string was already queried - can't change it now! */
_mesa_problem(ctx, "Trying to enable/disable extension after glGetString(GL_EXTENSIONS): %s", name);
return GL_FALSE;
}
offset = name_to_offset(name);
if (offset == 0) {
_mesa_problem(ctx, "Trying to enable/disable unknown extension %s",
name);
return GL_FALSE;
} else if (offset == o(dummy_true) && state == GL_FALSE) {
_mesa_problem(ctx, "Trying to disable a permanently enabled extension: "
"%s", name);
return GL_FALSE;
} else {
GLboolean *base = (GLboolean *) &ctx->Extensions;
base[offset] = state;
return GL_TRUE;
}
}
/**
* Test if the named extension is enabled in this context.
*/
GLboolean
_mesa_extension_is_enabled( struct gl_context *ctx, const char *name )
{
size_t offset;
GLboolean *base;
if (name == 0)
return GL_FALSE;
offset = name_to_offset(name);
if (offset == 0)
return GL_FALSE;
base = (GLboolean *) &ctx->Extensions;
return base[offset];
}