1 /************************************************************************** 2 * 3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR 22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 /* Authors: Keith Whitwell <keith@tungstengraphics.com> 29 */ 30 31 #ifndef SP_QUAD_H 32 #define SP_QUAD_H 33 34 #include "pipe/p_state.h" 35 #include "tgsi/tgsi_exec.h" 36 37 38 #define QUAD_PRIM_POINT 1 39 #define QUAD_PRIM_LINE 2 40 #define QUAD_PRIM_TRI 3 41 42 43 /* The rasterizer generates 2x2 quads of fragment and feeds them to 44 * the current fp_machine (see below). 45 * Remember that Y=0=top with Y increasing down the window. 46 */ 47 #define QUAD_TOP_LEFT 0 48 #define QUAD_TOP_RIGHT 1 49 #define QUAD_BOTTOM_LEFT 2 50 #define QUAD_BOTTOM_RIGHT 3 51 52 #define MASK_TOP_LEFT (1 << QUAD_TOP_LEFT) 53 #define MASK_TOP_RIGHT (1 << QUAD_TOP_RIGHT) 54 #define MASK_BOTTOM_LEFT (1 << QUAD_BOTTOM_LEFT) 55 #define MASK_BOTTOM_RIGHT (1 << QUAD_BOTTOM_RIGHT) 56 #define MASK_ALL 0xf 57 58 59 /** 60 * Quad stage inputs (pos, coverage, front/back face, etc) 61 */ 62 struct quad_header_input 63 { 64 int x0, y0; /**< quad window pos, always even */ 65 float coverage[TGSI_QUAD_SIZE]; /**< fragment coverage for antialiasing */ 66 unsigned facing:1; /**< Front (0) or back (1) facing? */ 67 unsigned prim:2; /**< QUAD_PRIM_POINT, LINE, TRI */ 68 }; 69 70 71 /** 72 * Quad stage inputs/outputs. 73 */ 74 struct quad_header_inout 75 { 76 unsigned mask:4; 77 }; 78 79 80 /** 81 * Quad stage outputs (color & depth). 82 */ 83 struct quad_header_output 84 { 85 /** colors in SOA format (rrrr, gggg, bbbb, aaaa) */ 86 float color[PIPE_MAX_COLOR_BUFS][TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]; 87 float depth[TGSI_QUAD_SIZE]; 88 uint8_t stencil[TGSI_QUAD_SIZE]; 89 }; 90 91 92 /** 93 * Encodes everything we need to know about a 2x2 pixel block. Uses 94 * "Channel-Serial" or "SoA" layout. 95 */ 96 struct quad_header { 97 struct quad_header_input input; 98 struct quad_header_inout inout; 99 struct quad_header_output output; 100 101 /* Redundant/duplicated: 102 */ 103 const struct tgsi_interp_coef *posCoef; 104 const struct tgsi_interp_coef *coef; 105 }; 106 107 #endif /* SP_QUAD_H */ 108