forked from KolibriOS/kolibrios
108 lines
3.2 KiB
C
108 lines
3.2 KiB
C
/**************************************************************************
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*
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* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/* Authors: Keith Whitwell <keith@tungstengraphics.com>
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*/
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#ifndef SP_QUAD_H
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#define SP_QUAD_H
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#include "pipe/p_state.h"
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#include "tgsi/tgsi_exec.h"
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#define QUAD_PRIM_POINT 1
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#define QUAD_PRIM_LINE 2
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#define QUAD_PRIM_TRI 3
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/* The rasterizer generates 2x2 quads of fragment and feeds them to
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* the current fp_machine (see below).
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* Remember that Y=0=top with Y increasing down the window.
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*/
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#define QUAD_TOP_LEFT 0
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#define QUAD_TOP_RIGHT 1
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#define QUAD_BOTTOM_LEFT 2
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#define QUAD_BOTTOM_RIGHT 3
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#define MASK_TOP_LEFT (1 << QUAD_TOP_LEFT)
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#define MASK_TOP_RIGHT (1 << QUAD_TOP_RIGHT)
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#define MASK_BOTTOM_LEFT (1 << QUAD_BOTTOM_LEFT)
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#define MASK_BOTTOM_RIGHT (1 << QUAD_BOTTOM_RIGHT)
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#define MASK_ALL 0xf
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/**
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* Quad stage inputs (pos, coverage, front/back face, etc)
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*/
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struct quad_header_input
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{
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int x0, y0; /**< quad window pos, always even */
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float coverage[TGSI_QUAD_SIZE]; /**< fragment coverage for antialiasing */
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unsigned facing:1; /**< Front (0) or back (1) facing? */
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unsigned prim:2; /**< QUAD_PRIM_POINT, LINE, TRI */
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};
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/**
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* Quad stage inputs/outputs.
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*/
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struct quad_header_inout
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{
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unsigned mask:4;
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};
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/**
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* Quad stage outputs (color & depth).
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*/
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struct quad_header_output
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{
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/** colors in SOA format (rrrr, gggg, bbbb, aaaa) */
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float color[PIPE_MAX_COLOR_BUFS][TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE];
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float depth[TGSI_QUAD_SIZE];
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uint8_t stencil[TGSI_QUAD_SIZE];
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};
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/**
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* Encodes everything we need to know about a 2x2 pixel block. Uses
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* "Channel-Serial" or "SoA" layout.
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*/
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struct quad_header {
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struct quad_header_input input;
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struct quad_header_inout inout;
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struct quad_header_output output;
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/* Redundant/duplicated:
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*/
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const struct tgsi_interp_coef *posCoef;
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const struct tgsi_interp_coef *coef;
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};
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#endif /* SP_QUAD_H */
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