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/*
* Copyright 2003 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* 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 NONINFRINGEMENT.
* 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.
*/
#include "main/context.h"
#include "main/macros.h"
#include "main/enums.h"
#include "main/dd.h"
#include "intel_screen.h"
#include "brw_context.h"
#include "brw_defines.h"
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;
case GL_LESS:
return BRW_COMPAREFUNCTION_LEQUAL;
case GL_LEQUAL:
return BRW_COMPAREFUNCTION_LESS;
case GL_GREATER:
return BRW_COMPAREFUNCTION_GEQUAL;
case GL_GEQUAL:
return BRW_COMPAREFUNCTION_GREATER;
case GL_NOTEQUAL:
return BRW_COMPAREFUNCTION_EQUAL;
case GL_EQUAL:
return BRW_COMPAREFUNCTION_NOTEQUAL;
case GL_ALWAYS:
return BRW_COMPAREFUNCTION_NEVER;
}
unreachable("Invalid shadow comparison function.");
}
int
intel_translate_compare_func(GLenum func)
{
switch (func) {
case GL_NEVER:
return BRW_COMPAREFUNCTION_NEVER;
case GL_LESS:
return BRW_COMPAREFUNCTION_LESS;
case GL_LEQUAL:
return BRW_COMPAREFUNCTION_LEQUAL;
case GL_GREATER:
return BRW_COMPAREFUNCTION_GREATER;
case GL_GEQUAL:
return BRW_COMPAREFUNCTION_GEQUAL;
case GL_NOTEQUAL:
return BRW_COMPAREFUNCTION_NOTEQUAL;
case GL_EQUAL:
return BRW_COMPAREFUNCTION_EQUAL;
case GL_ALWAYS:
return BRW_COMPAREFUNCTION_ALWAYS;
}
unreachable("Invalid comparison function.");
}
int
intel_translate_stencil_op(GLenum op)
{
switch (op) {
case GL_KEEP:
return BRW_STENCILOP_KEEP;
case GL_ZERO:
return BRW_STENCILOP_ZERO;
case GL_REPLACE:
return BRW_STENCILOP_REPLACE;
case GL_INCR:
return BRW_STENCILOP_INCRSAT;
case GL_DECR:
return BRW_STENCILOP_DECRSAT;
case GL_INCR_WRAP:
return BRW_STENCILOP_INCR;
case GL_DECR_WRAP:
return BRW_STENCILOP_DECR;
case GL_INVERT:
return BRW_STENCILOP_INVERT;
default:
return BRW_STENCILOP_ZERO;
}
}
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