source/backends/vulkan/synchronizer.cpp

   1 #include <msp/core/algorithm.h>
   2 #include "buffer.h"
   3 #include "device.h"
   4 #include "texture.h"
   5 #include "synchronizer.h"
   6 #include "vulkan.h"
   7
   8 using namespace std;
   9
  10 namespace Msp {
  11 namespace GL {
  12
  13 Synchronizer::Synchronizer(Device &d):
  14         device(d)
  15 { }
  16
  17 void Synchronizer::access(VkBuffer buffer, size_t offset, size_t size)
  18 {
  19         auto i = find_member(buffer_accesses, buffer, &BufferAccess::buffer);
  20         if(i==buffer_accesses.end())
  21         {
  22                 i = buffer_accesses.emplace(buffer_accesses.end());
  23                 i->buffer = buffer;
  24                 i->offset = offset;
  25                 i->size = size;
  26         }
  27         else
  28         {
  29                 size_t begin = min(offset, i->offset);
  30                 size_t end = max(offset+size, i->offset+i->size);
  31                 i->offset = begin;
  32                 i->size = end-begin;
  33         }
  34
  35         i->pending_write = true;
  36 }
  37
  38 void Synchronizer::access(VkImage image, unsigned aspect, int layer, unsigned layout, bool discard)
  39 {
  40         auto i = find_member(image_accesses, image, &ImageAccess::image);
  41         if(i==image_accesses.end())
  42         {
  43                 i = image_accesses.emplace(image_accesses.end());
  44                 i->image = image;
  45                 i->aspect = aspect;
  46                 i->layer = layer;
  47                 i->current_layout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
  48         }
  49
  50         if(discard)
  51                 i->current_layout = VK_IMAGE_LAYOUT_UNDEFINED;
  52         if(layer!=i->layer)
  53                 i->layer = -1;
  54         i->pending_layout = layout;
  55 }
  56
  57 void Synchronizer::reset()
  58 {
  59         for(BufferAccess &b: buffer_accesses)
  60                 b.pending_write = false;
  61         for(ImageAccess &i: image_accesses)
  62                 i.pending_layout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
  63 }
  64
  65 void Synchronizer::barrier(VkCommandBuffer command_buffer)
  66 {
  67         const VulkanFunctions &vk = device.get_functions();
  68
  69         if(buffer_accesses.empty() && image_accesses.empty())
  70                 return;
  71
  72         VkPipelineStageFlags src_stage = 0;
  73         VkPipelineStageFlags dst_stage = 0;
  74
  75         static constexpr VkPipelineStageFlags buffer_read_stages = VK_PIPELINE_STAGE_VERTEX_INPUT_BIT|
  76                 VK_PIPELINE_STAGE_VERTEX_SHADER_BIT|VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT;
  77         static constexpr VkPipelineStageFlags buffer_write_stages = VK_PIPELINE_STAGE_TRANSFER_BIT;
  78
  79         vector<VkBufferMemoryBarrier> buffer_barriers;
  80         buffer_barriers.reserve(buffer_accesses.size());
  81         for(BufferAccess &b: buffer_accesses)
  82         {
  83                 buffer_barriers.emplace_back(VkBufferMemoryBarrier{ });
  84                 VkBufferMemoryBarrier &barrier = buffer_barriers.back();
  85
  86                 barrier.sType = VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER;
  87                 barrier.srcAccessMask = (b.was_written ? VK_ACCESS_MEMORY_WRITE_BIT : 0);
  88                 barrier.dstAccessMask = (b.pending_write ? VK_ACCESS_MEMORY_WRITE_BIT : VK_ACCESS_MEMORY_READ_BIT);
  89                 barrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
  90                 barrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
  91                 barrier.buffer = handle_cast<::VkBuffer>(b.buffer);
  92                 barrier.offset = b.offset;
  93                 barrier.size = b.size;
  94
  95                 src_stage |= (b.was_written ? buffer_write_stages : buffer_read_stages);
  96                 dst_stage |= (b.pending_write ? buffer_write_stages : buffer_read_stages);
  97         }
  98
  99         static constexpr VkPipelineStageFlags image_read_stages = VK_PIPELINE_STAGE_VERTEX_SHADER_BIT|VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT|
 100                 VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT|VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT;
 101         static constexpr VkPipelineStageFlags image_write_stages = VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT|
 102                 VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT|VK_PIPELINE_STAGE_TRANSFER_BIT;
 103
 104         vector<VkImageMemoryBarrier> image_barriers;
 105         image_barriers.reserve(image_accesses.size());
 106         for(const ImageAccess &i: image_accesses)
 107         {
 108                 image_barriers.emplace_back(VkImageMemoryBarrier{ });
 109                 VkImageMemoryBarrier &barrier = image_barriers.back();
 110
 111                 barrier.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
 112                 barrier.srcAccessMask = (is_write_layout(i.current_layout) ? VK_ACCESS_MEMORY_WRITE_BIT : 0);
 113                 barrier.dstAccessMask = (is_write_layout(i.pending_layout) ? VK_ACCESS_MEMORY_WRITE_BIT : VK_ACCESS_MEMORY_READ_BIT);
 114                 barrier.oldLayout = static_cast<VkImageLayout>(i.current_layout);
 115                 barrier.newLayout = static_cast<VkImageLayout>(i.pending_layout);
 116                 barrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
 117                 barrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
 118                 barrier.image = handle_cast<::VkImage>(i.image);
 119                 barrier.subresourceRange.aspectMask = i.aspect;
 120                 barrier.subresourceRange.baseMipLevel = 0;
 121                 barrier.subresourceRange.levelCount = VK_REMAINING_MIP_LEVELS;
 122                 if(i.layer>=0)
 123                 {
 124                         barrier.subresourceRange.baseArrayLayer = i.layer;
 125                         barrier.subresourceRange.layerCount = 1;
 126                 }
 127                 else
 128                 {
 129                         barrier.subresourceRange.baseArrayLayer = 0;
 130                         barrier.subresourceRange.layerCount = VK_REMAINING_ARRAY_LAYERS;
 131                 }
 132
 133                 if(i.current_layout!=VK_IMAGE_LAYOUT_UNDEFINED)
 134                         src_stage |= (is_write_layout(i.current_layout) ? image_write_stages : image_read_stages);
 135                 dst_stage |= (is_write_layout(i.pending_layout) ? image_write_stages : image_read_stages);
 136         }
 137
 138         if(!src_stage)
 139                 src_stage = VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT;
 140         if(!dst_stage)
 141                 dst_stage = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
 142
 143         vk.CmdPipelineBarrier(command_buffer, src_stage, dst_stage, 0, 0, 0,
 144                 buffer_barriers.size(), buffer_barriers.data(), image_barriers.size(), image_barriers.data());
 145
 146         for(auto i=buffer_accesses.begin(); i!=buffer_accesses.end(); )
 147         {
 148                 if(!i->pending_write)
 149                         i = buffer_accesses.erase(i);
 150                 else
 151                 {
 152                         i->was_written = i->pending_write;
 153                         ++i;
 154                 }
 155         }
 156
 157         for(auto i=image_accesses.begin(); i!=image_accesses.end(); )
 158         {
 159                 if(i->pending_layout==VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL)
 160                         i = image_accesses.erase(i);
 161                 else
 162                 {
 163                         i->current_layout = i->pending_layout;
 164                         ++i;
 165                 }
 166         }
 167 }
 168
 169 bool Synchronizer::is_write_layout(unsigned layout)
 170 {
 171         return layout==VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL || layout==VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL ||
 172                 layout==VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
 173 }
 174
 175 } // namespace GL
 176 } // namespace Msp