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i965: Move arrays brw_multisample_positions* to new header
Move the arrays to the new header brw_multisample_state.h, which will be shared with Broadwell code. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Signed-off-by: Chad Versace <chad.versace@linux.intel.com>
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Chad Versace
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2 changed files with 73 additions and 46 deletions
72
src/mesa/drivers/dri/i965/brw_multisample_state.h
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src/mesa/drivers/dri/i965/brw_multisample_state.h
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@ -0,0 +1,72 @@
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/*
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* Copyright © 2013 Intel Corporation
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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 "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <stdint.h>
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/**
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* Sample positions:
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* 2 6 a e
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* 2 0
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* 6 1
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* a 2
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* e 3
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*/
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static const uint32_t
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brw_multisample_positions_4x[] = { 0xae2ae662 };
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/**
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* Sample positions are based on a solution to the "8 queens" puzzle.
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* Rationale: in a solution to the 8 queens puzzle, no two queens share
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* a row, column, or diagonal. This is a desirable property for samples
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* in a multisampling pattern, because it ensures that the samples are
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* relatively uniformly distributed through the pixel.
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*
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* There are several solutions to the 8 queens puzzle (see
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* http://en.wikipedia.org/wiki/Eight_queens_puzzle). This solution was
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* chosen because it has a queen close to the center; this should
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* improve the accuracy of centroid interpolation, since the hardware
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* implements centroid interpolation by choosing the centermost sample
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* that overlaps with the primitive being drawn.
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*
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* Note: from the Ivy Bridge PRM, Vol2 Part1 p304 (3DSTATE_MULTISAMPLE:
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* Programming Notes):
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*
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* "When programming the sample offsets (for NUMSAMPLES_4 or _8 and
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* MSRASTMODE_xxx_PATTERN), the order of the samples 0 to 3 (or 7
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* for 8X) must have monotonically increasing distance from the
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* pixel center. This is required to get the correct centroid
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* computation in the device."
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*
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* Sample positions:
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* 1 3 5 7 9 b d f
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* 1 5
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* 3 2
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* 5 6
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* 7 4
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* 9 0
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* b 3
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* d 1
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* f 7
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*/
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static const uint32_t
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brw_multisample_positions_8x[] = { 0xdbb39d79, 0x3ff55117 };
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@ -25,52 +25,7 @@
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#include "brw_context.h"
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#include "brw_defines.h"
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/* Sample positions:
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* 2 6 a e
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* 2 0
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* 6 1
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* a 2
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* e 3
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*/
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static uint32_t
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brw_multisample_positions_4x[] = { 0xae2ae662 };
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/* Sample positions are based on a solution to the "8 queens" puzzle.
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* Rationale: in a solution to the 8 queens puzzle, no two queens share
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* a row, column, or diagonal. This is a desirable property for samples
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* in a multisampling pattern, because it ensures that the samples are
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* relatively uniformly distributed through the pixel.
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*
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* There are several solutions to the 8 queens puzzle (see
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* http://en.wikipedia.org/wiki/Eight_queens_puzzle). This solution was
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* chosen because it has a queen close to the center; this should
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* improve the accuracy of centroid interpolation, since the hardware
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* implements centroid interpolation by choosing the centermost sample
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* that overlaps with the primitive being drawn.
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*
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* Note: from the Ivy Bridge PRM, Vol2 Part1 p304 (3DSTATE_MULTISAMPLE:
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* Programming Notes):
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*
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* "When programming the sample offsets (for NUMSAMPLES_4 or _8 and
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* MSRASTMODE_xxx_PATTERN), the order of the samples 0 to 3 (or 7
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* for 8X) must have monotonically increasing distance from the
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* pixel center. This is required to get the correct centroid
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* computation in the device."
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*
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* Sample positions:
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* 1 3 5 7 9 b d f
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* 1 5
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* 3 2
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* 5 6
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* 7 4
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* 9 0
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* b 3
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* d 1
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* f 7
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*/
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static uint32_t
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brw_multisample_positions_8x[] = { 0xdbb39d79, 0x3ff55117 };
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#include "brw_multisample_state.h"
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void
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gen6_get_sample_position(struct gl_context *ctx,
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