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[Vulkan] Add tesselation support

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Pretty much just following the D3D12 implementation
This commit is contained in:
Herman S.
2025-12-10 14:19:47 +09:00
parent 3e3aee1ef2
commit 83d776fa39
33 changed files with 3269 additions and 75 deletions
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69
src/xenia/gpu/vulkan/vulkan_command_processor.cc
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@@ -225,6 +225,21 @@ bool VulkanCommandProcessor::SetupContext() {
descriptor_set_layout_bindings_constants
[SpirvShaderTranslator::kConstantBufferFetch]
.stageFlags = guest_shader_stages;
// Clip plane constants - used by vertex shader (and TES for tessellation).
descriptor_set_layout_bindings_constants
[SpirvShaderTranslator::kConstantBufferClipPlanes]
.stageFlags = guest_shader_vertex_stages_;
// Tessellation constants - used by tessellation control shader, the
// tessellation vertex shader (for index/factor processing), and the
// tessellation evaluation shader (domain shader, which is the translated
// Xenos vertex shader).
descriptor_set_layout_bindings_constants
[SpirvShaderTranslator::kConstantBufferTessellation]
.stageFlags = device_properties.tessellationShader
? (VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT |
VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT |
VK_SHADER_STAGE_VERTEX_BIT)
: 0;
descriptor_set_layout_create_info.bindingCount =
uint32_t(xe::countof(descriptor_set_layout_bindings_constants));
descriptor_set_layout_create_info.pBindings =
@@ -2302,12 +2317,17 @@ bool VulkanCommandProcessor::IssueDraw(xenos::PrimitiveType prim_type,
// Nothing to draw.
return true;
}
// TODO(Triang3l): Tessellation, geometry-type-specific vertex shader,
// vertex shader as compute.
// TODO(Triang3l): Geometry-type-specific vertex shader, vertex shader as
// compute.
// Skip unsupported host vertex shader types (but allow tessellation types
// through - they will be handled in pipeline creation or rejected there if
// not fully supported yet).
if (primitive_processing_result.host_vertex_shader_type !=
Shader::HostVertexShaderType::kVertex &&
primitive_processing_result.host_vertex_shader_type !=
Shader::HostVertexShaderType::kPointListAsTriangleStrip) {
Shader::HostVertexShaderType::kPointListAsTriangleStrip &&
!Shader::IsHostVertexShaderTypeDomain(
primitive_processing_result.host_vertex_shader_type)) {
return false;
}
@@ -4514,6 +4534,49 @@ bool VulkanCommandProcessor::UpdateBindings(const VulkanShader* vertex_shader,
current_constant_buffers_up_to_date_ |=
UINT32_C(1) << SpirvShaderTranslator::kConstantBufferClipPlanes;
}
// Tessellation constants.
// Always initialize the buffer info, even if tessellation is not active,
// because the descriptor set write always includes all constant buffers.
if (!(current_constant_buffers_up_to_date_ &
(UINT32_C(1)
<< SpirvShaderTranslator::kConstantBufferTessellation))) {
VkDescriptorBufferInfo& buffer_info = current_constant_buffer_infos_
[SpirvShaderTranslator::kConstantBufferTessellation];
uint8_t* mapping = uniform_buffer_pool_->Request(
frame_current_, sizeof(SpirvShaderTranslator::TessellationConstants),
uniform_buffer_alignment, buffer_info.buffer, buffer_info.offset);
if (!mapping) {
return false;
}
buffer_info.range = sizeof(SpirvShaderTranslator::TessellationConstants);
// Populate tessellation constants from registers.
SpirvShaderTranslator::TessellationConstants tessellation_constants;
// Tessellation factor range, plus 1.0 according to Xbox 360 docs.
// For fractional_even partitioning (continuous mode), minimum must be
// >= 2.0.
float tess_factor_min =
regs.Get<float>(XE_GPU_REG_VGT_HOS_MIN_TESS_LEVEL) + 1.0f;
float tess_factor_max =
regs.Get<float>(XE_GPU_REG_VGT_HOS_MAX_TESS_LEVEL) + 1.0f;
tessellation_constants.tessellation_factor_range[0] = tess_factor_min;
tessellation_constants.tessellation_factor_range[1] = tess_factor_max;
tessellation_constants.padding0[0] = 0.0f;
tessellation_constants.padding0[1] = 0.0f;
// Vertex index processing parameters for tessellation shaders.
auto vgt_dma_size = regs.Get<reg::VGT_DMA_SIZE>();
tessellation_constants.vertex_index_endian =
static_cast<uint32_t>(vgt_dma_size.swap_mode);
tessellation_constants.vertex_index_offset =
regs[XE_GPU_REG_VGT_INDX_OFFSET];
tessellation_constants.vertex_index_min_max[0] =
regs[XE_GPU_REG_VGT_MIN_VTX_INDX];
tessellation_constants.vertex_index_min_max[1] =
regs[XE_GPU_REG_VGT_MAX_VTX_INDX];
std::memcpy(mapping, &tessellation_constants,
sizeof(SpirvShaderTranslator::TessellationConstants));
current_constant_buffers_up_to_date_ |=
UINT32_C(1) << SpirvShaderTranslator::kConstantBufferTessellation;
}
// Vertex shader float constants.
if (!(current_constant_buffers_up_to_date_ &
(UINT32_C(1) << SpirvShaderTranslator::kConstantBufferFloatVertex))) {