source/backends/vulkan/program_backend.cpp

   1 #include <cstring>
   2 #include <msp/core/algorithm.h>
   3 #include "device.h"
   4 #include "error.h"
   5 #include "program.h"
   6 #include "program_backend.h"
   7 #include "structurebuilder.h"
   8 #include "vulkan.h"
   9
  10 using namespace std;
  11
  12 namespace Msp {
  13 namespace GL {
  14
  15 VulkanProgram::VulkanProgram():
  16         device(Device::get_current())
  17 { }
  18
  19 VulkanProgram::VulkanProgram(VulkanProgram &&other):
  20         device(other.device),
  21         n_stages(other.n_stages),
  22         stage_flags(other.stage_flags),
  23         creation_info(move(other.creation_info)),
  24         desc_set_layout_handles(move(other.desc_set_layout_handles)),
  25         layout_handle(other.layout_handle)
  26 {
  27         other.desc_set_layout_handles.clear();
  28         other.layout_handle = 0;
  29 }
  30
  31 VulkanProgram::~VulkanProgram()
  32 {
  33         const VulkanFunctions &vk = device.get_functions();
  34
  35         if(layout_handle)
  36                 vk.DestroyPipelineLayout(layout_handle);
  37         for(VkDescriptorSetLayout d: desc_set_layout_handles)
  38                 vk.DestroyDescriptorSetLayout(d);
  39 }
  40
  41 bool VulkanProgram::has_stages() const
  42 {
  43         return n_stages;
  44 }
  45
  46 void VulkanProgram::add_glsl_stages(const GlslModule &, const map<string, int> &)
  47 {
  48         throw invalid_operation("VulkanProgram::add_glsl_stages");
  49 }
  50
  51 void VulkanProgram::add_spirv_stages(const SpirVModule &mod, const map<string, int> &spec_values)
  52 {
  53         const vector<SpirVModule::EntryPoint> &entry_points = mod.get_entry_points();
  54
  55         n_stages = entry_points.size();
  56         size_t entry_names_size = 0;
  57         for(const SpirVModule::EntryPoint &e: entry_points)
  58                 entry_names_size += e.name.size()+1;
  59
  60         StructureBuilder sb(creation_info, 5);
  61         VkPipelineShaderStageCreateInfo *&stage_infos = sb.add<VkPipelineShaderStageCreateInfo>(n_stages);
  62         char *&name_table = sb.add<char>(entry_names_size);
  63         VkSpecializationInfo *&spec_info = sb.add<VkSpecializationInfo>();
  64         VkSpecializationMapEntry *&spec_map = sb.add<VkSpecializationMapEntry>(spec_values.size());
  65         int *&spec_data = sb.add<int>(spec_values.size());
  66
  67         unsigned i = 0;
  68         for(const SpirVModule::Constant &c: mod.get_spec_constants())
  69         {
  70                 auto j = spec_values.find(c.name);
  71                 if(j!=spec_values.end())
  72                 {
  73                         spec_map[i].constantID = c.constant_id;
  74                         spec_map[i].offset = i*sizeof(int);
  75                         spec_map[i].size = sizeof(int);
  76                         spec_data[i] = j->second;
  77                         ++i;
  78                 }
  79         }
  80
  81         spec_info->mapEntryCount = i;
  82         spec_info->pMapEntries = spec_map;
  83         spec_info->dataSize = spec_values.size()*sizeof(int);
  84         spec_info->pData = spec_data;
  85
  86         char *name_ptr = name_table;
  87         i = 0;
  88         for(const SpirVModule::EntryPoint &e: entry_points)
  89         {
  90                 unsigned stage_bit = get_vulkan_stage(e.stage);
  91                 stage_flags |= stage_bit;
  92
  93                 stage_infos[i].sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
  94                 stage_infos[i].stage = static_cast<VkShaderStageFlagBits>(stage_bit);
  95                 stage_infos[i].module = handle_cast<::VkShaderModule>(mod.handle);
  96                 strcpy(name_ptr, e.name.c_str());
  97                 stage_infos[i].pName = name_ptr;
  98                 name_ptr += e.name.size()+1;
  99                 stage_infos[i].pSpecializationInfo = spec_info;
 100                 ++i;
 101         }
 102 }
 103
 104 void VulkanProgram::finalize_uniforms()
 105 {
 106         const VulkanFunctions &vk = device.get_functions();
 107         const ReflectData &rd = static_cast<const Program *>(this)->reflect_data;
 108
 109         auto i = find_member(rd.uniform_blocks, static_cast<int>(ReflectData::PUSH_CONSTANT), &ReflectData::UniformBlockInfo::bind_point);
 110         const ReflectData::UniformBlockInfo *push_const_block = (i!=rd.uniform_blocks.end() ? &*i : 0);
 111
 112         desc_set_layout_handles.resize(rd.n_descriptor_sets);
 113         for(unsigned j=0; j<rd.n_descriptor_sets; ++j)
 114         {
 115                 std::vector<VkDescriptorSetLayoutBinding> bindings;
 116                 for(const ReflectData::UniformBlockInfo &b: rd.uniform_blocks)
 117                         if(b.bind_point>=0 && static_cast<unsigned>(b.bind_point>>20)==j)
 118                         {
 119                                 bindings.emplace_back();
 120                                 VkDescriptorSetLayoutBinding &binding = bindings.back();
 121                                 binding.binding = b.bind_point;
 122                                 binding.descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC;
 123                                 binding.descriptorCount = 1;
 124                                 binding.stageFlags = VK_SHADER_STAGE_ALL;
 125                                 binding.pImmutableSamplers = 0;
 126                         }
 127
 128                 for(const ReflectData::UniformInfo &u: rd.uniforms)
 129                         if(u.binding>=0 && static_cast<unsigned>(u.binding>>20)==j && is_image(u.type))
 130                         {
 131                                 bindings.emplace_back();
 132                                 VkDescriptorSetLayoutBinding &binding = bindings.back();
 133                                 binding.binding = u.binding;
 134                                 binding.descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
 135                                 binding.descriptorCount = 1;
 136                                 binding.stageFlags = VK_SHADER_STAGE_ALL;
 137                                 binding.pImmutableSamplers = 0;
 138                         }
 139
 140                 VkDescriptorSetLayoutCreateInfo set_layout_info = { };
 141                 set_layout_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
 142                 set_layout_info.bindingCount = bindings.size();
 143                 set_layout_info.pBindings = bindings.data();
 144
 145                 vk.CreateDescriptorSetLayout(set_layout_info, desc_set_layout_handles[j]);
 146         }
 147
 148         VkPushConstantRange push_const_range = { };
 149         push_const_range.stageFlags = stage_flags;
 150         push_const_range.offset = 0;
 151         push_const_range.size = (push_const_block ? push_const_block->data_size : 0);
 152
 153         VkPipelineLayoutCreateInfo layout_info = { };
 154         layout_info.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO;
 155         layout_info.setLayoutCount = rd.n_descriptor_sets;
 156         layout_info.pSetLayouts = handle_cast<::VkDescriptorSetLayout *>(desc_set_layout_handles.data());
 157         layout_info.pushConstantRangeCount = (push_const_block ? 1 : 0);
 158         layout_info.pPushConstantRanges = &push_const_range;
 159
 160         vk.CreatePipelineLayout(layout_info, layout_handle);
 161 }
 162
 163 } // namespace GL
 164 } // namespace Msp