/**************************************************************************
*
- * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * Copyright 2003 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
- * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
int
intel_translate_shadow_compare_func(GLenum func)
{
+ /* GL specifies the result of shadow comparisons as:
+ * 1 if ref <op> texel,
+ * 0 otherwise.
+ *
+ * The hardware does:
+ * 0 if texel <op> ref,
+ * 1 otherwise.
+ *
+ * So, these look a bit strange because there's both a negation
+ * and swapping of the arguments involved.
+ */
switch (func) {
case GL_NEVER:
- return BRW_COMPAREFUNCTION_ALWAYS;
+ return BRW_COMPAREFUNCTION_ALWAYS;
case GL_LESS:
- return BRW_COMPAREFUNCTION_LEQUAL;
+ return BRW_COMPAREFUNCTION_LEQUAL;
case GL_LEQUAL:
- return BRW_COMPAREFUNCTION_LESS;
+ return BRW_COMPAREFUNCTION_LESS;
case GL_GREATER:
- return BRW_COMPAREFUNCTION_GEQUAL;
+ return BRW_COMPAREFUNCTION_GEQUAL;
case GL_GEQUAL:
return BRW_COMPAREFUNCTION_GREATER;
case GL_NOTEQUAL:
case GL_EQUAL:
return BRW_COMPAREFUNCTION_NOTEQUAL;
case GL_ALWAYS:
- return BRW_COMPAREFUNCTION_NEVER;
+ return BRW_COMPAREFUNCTION_NEVER;
}
- assert(!"Invalid shadow comparison function.");
- return BRW_COMPAREFUNCTION_NEVER;
+ unreachable("Invalid shadow comparison function.");
}
int
return BRW_COMPAREFUNCTION_ALWAYS;
}
- assert(!"Invalid comparison function.");
- return BRW_COMPAREFUNCTION_ALWAYS;
+ unreachable("Invalid comparison function.");
}
int