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