| /* |
| * Copyright © 2020 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 "vk_standard_sample_locations.h" |
| |
| #include "vk_graphics_state.h" |
| |
| /** |
| * 1x MSAA has a single sample at the center: (0.5, 0.5) -> (0x8, 0x8). |
| */ |
| static const struct vk_sample_locations_state sample_locations_state_1x = { |
| .per_pixel = VK_SAMPLE_COUNT_1_BIT, |
| .grid_size = { 1, 1 }, |
| .locations = { |
| { 0.5, 0.5 }, |
| }, |
| }; |
| |
| |
| /** |
| * 2x MSAA sample positions are (0.25, 0.25) and (0.75, 0.75): |
| * 4 c |
| * 4 0 |
| * c 1 |
| */ |
| static const struct vk_sample_locations_state sample_locations_state_2x = { |
| .per_pixel = VK_SAMPLE_COUNT_2_BIT, |
| .grid_size = { 1, 1 }, |
| .locations = { |
| { 0.75, 0.75 }, |
| { 0.25, 0.25 }, |
| }, |
| }; |
| |
| /** |
| * Sample positions: |
| * 2 6 a e |
| * 2 0 |
| * 6 1 |
| * a 2 |
| * e 3 |
| */ |
| static const struct vk_sample_locations_state sample_locations_state_4x = { |
| .per_pixel = VK_SAMPLE_COUNT_4_BIT, |
| .grid_size = { 1, 1 }, |
| .locations = { |
| { 0.375, 0.125 }, |
| { 0.875, 0.375 }, |
| { 0.125, 0.625 }, |
| { 0.625, 0.875 }, |
| }, |
| }; |
| |
| /** |
| * Sample positions: |
| * 1 3 5 7 9 b d f |
| * 1 7 |
| * 3 3 |
| * 5 0 |
| * 7 5 |
| * 9 2 |
| * b 1 |
| * d 4 |
| * f 6 |
| */ |
| static const struct vk_sample_locations_state sample_locations_state_8x = { |
| .per_pixel = VK_SAMPLE_COUNT_8_BIT, |
| .grid_size = { 1, 1 }, |
| .locations = { |
| { 0.5625, 0.3125 }, |
| { 0.4375, 0.6875 }, |
| { 0.8125, 0.5625 }, |
| { 0.3125, 0.1875 }, |
| { 0.1875, 0.8125 }, |
| { 0.0625, 0.4375 }, |
| { 0.6875, 0.9375 }, |
| { 0.9375, 0.0625 }, |
| }, |
| }; |
| |
| /** |
| * Sample positions: |
| * |
| * 0 1 2 3 4 5 6 7 8 9 a b c d e f |
| * 0 15 |
| * 1 9 |
| * 2 10 |
| * 3 7 |
| * 4 13 |
| * 5 1 |
| * 6 4 |
| * 7 3 |
| * 8 12 |
| * 9 0 |
| * a 2 |
| * b 6 |
| * c 11 |
| * d 5 |
| * e 8 |
| * f 14 |
| */ |
| static const struct vk_sample_locations_state sample_locations_state_16x = { |
| .per_pixel = VK_SAMPLE_COUNT_16_BIT, |
| .grid_size = { 1, 1 }, |
| .locations = { |
| { 0.5625, 0.5625 }, |
| { 0.4375, 0.3125 }, |
| { 0.3125, 0.6250 }, |
| { 0.7500, 0.4375 }, |
| { 0.1875, 0.3750 }, |
| { 0.6250, 0.8125 }, |
| { 0.8125, 0.6875 }, |
| { 0.6875, 0.1875 }, |
| { 0.3750, 0.8750 }, |
| { 0.5000, 0.0625 }, |
| { 0.2500, 0.1250 }, |
| { 0.1250, 0.7500 }, |
| { 0.0000, 0.5000 }, |
| { 0.9375, 0.2500 }, |
| { 0.8750, 0.9375 }, |
| { 0.0625, 0.0000 }, |
| }, |
| }; |
| |
| const struct vk_sample_locations_state * |
| vk_standard_sample_locations_state(VkSampleCountFlagBits sample_count) |
| { |
| switch (sample_count) { |
| case 1: return &sample_locations_state_1x; |
| case 2: return &sample_locations_state_2x; |
| case 4: return &sample_locations_state_4x; |
| case 8: return &sample_locations_state_8x; |
| case 16: return &sample_locations_state_16x; |
| default: unreachable("Sample count has no standard locations"); |
| } |
| } |