From: Chad Versace Date: Tue, 6 Aug 2013 22:52:11 +0000 (-0700) Subject: i965: Move arrays brw_multisample_positions* to new header X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=11b8f8e7e4fd9654df6cee9162aefee0bd571482;p=mesa.git 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 Signed-off-by: Chad Versace --- diff --git a/src/mesa/drivers/dri/i965/brw_multisample_state.h b/src/mesa/drivers/dri/i965/brw_multisample_state.h new file mode 100644 index 00000000000..79566f0bb23 --- /dev/null +++ b/src/mesa/drivers/dri/i965/brw_multisample_state.h @@ -0,0 +1,72 @@ +/* + * Copyright © 2013 Intel Corporation + * + * 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 + * THE AUTHORS OR COPYRIGHT HOLDERS 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 + +/** + * Sample positions: + * 2 6 a e + * 2 0 + * 6 1 + * a 2 + * e 3 + */ +static const uint32_t +brw_multisample_positions_4x[] = { 0xae2ae662 }; + +/** + * Sample positions are based on a solution to the "8 queens" puzzle. + * Rationale: in a solution to the 8 queens puzzle, no two queens share + * a row, column, or diagonal. This is a desirable property for samples + * in a multisampling pattern, because it ensures that the samples are + * relatively uniformly distributed through the pixel. + * + * There are several solutions to the 8 queens puzzle (see + * http://en.wikipedia.org/wiki/Eight_queens_puzzle). This solution was + * chosen because it has a queen close to the center; this should + * improve the accuracy of centroid interpolation, since the hardware + * implements centroid interpolation by choosing the centermost sample + * that overlaps with the primitive being drawn. + * + * Note: from the Ivy Bridge PRM, Vol2 Part1 p304 (3DSTATE_MULTISAMPLE: + * Programming Notes): + * + * "When programming the sample offsets (for NUMSAMPLES_4 or _8 and + * MSRASTMODE_xxx_PATTERN), the order of the samples 0 to 3 (or 7 + * for 8X) must have monotonically increasing distance from the + * pixel center. This is required to get the correct centroid + * computation in the device." + * + * Sample positions: + * 1 3 5 7 9 b d f + * 1 5 + * 3 2 + * 5 6 + * 7 4 + * 9 0 + * b 3 + * d 1 + * f 7 + */ +static const uint32_t +brw_multisample_positions_8x[] = { 0xdbb39d79, 0x3ff55117 }; diff --git a/src/mesa/drivers/dri/i965/gen6_multisample_state.c b/src/mesa/drivers/dri/i965/gen6_multisample_state.c index 0ba3642fb78..c94c9000530 100644 --- a/src/mesa/drivers/dri/i965/gen6_multisample_state.c +++ b/src/mesa/drivers/dri/i965/gen6_multisample_state.c @@ -25,52 +25,7 @@ #include "brw_context.h" #include "brw_defines.h" - -/* Sample positions: - * 2 6 a e - * 2 0 - * 6 1 - * a 2 - * e 3 - */ -static uint32_t -brw_multisample_positions_4x[] = { 0xae2ae662 }; -/* Sample positions are based on a solution to the "8 queens" puzzle. - * Rationale: in a solution to the 8 queens puzzle, no two queens share - * a row, column, or diagonal. This is a desirable property for samples - * in a multisampling pattern, because it ensures that the samples are - * relatively uniformly distributed through the pixel. - * - * There are several solutions to the 8 queens puzzle (see - * http://en.wikipedia.org/wiki/Eight_queens_puzzle). This solution was - * chosen because it has a queen close to the center; this should - * improve the accuracy of centroid interpolation, since the hardware - * implements centroid interpolation by choosing the centermost sample - * that overlaps with the primitive being drawn. - * - * Note: from the Ivy Bridge PRM, Vol2 Part1 p304 (3DSTATE_MULTISAMPLE: - * Programming Notes): - * - * "When programming the sample offsets (for NUMSAMPLES_4 or _8 and - * MSRASTMODE_xxx_PATTERN), the order of the samples 0 to 3 (or 7 - * for 8X) must have monotonically increasing distance from the - * pixel center. This is required to get the correct centroid - * computation in the device." - * - * Sample positions: - * 1 3 5 7 9 b d f - * 1 5 - * 3 2 - * 5 6 - * 7 4 - * 9 0 - * b 3 - * d 1 - * f 7 - */ -static uint32_t -brw_multisample_positions_8x[] = { 0xdbb39d79, 0x3ff55117 }; - +#include "brw_multisample_state.h" void gen6_get_sample_position(struct gl_context *ctx,