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Merge pull request #3490 from ReinUsesLisp/transform-feedbacks

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video_core: Initial implementation of transform feedbacks
This commit is contained in:
Fernando Sahmkow 2020-03-14 09:48:15 -04:00 committed by GitHub
commit 35145bd529
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GPG key ID: 4AEE18F83AFDEB23
17 changed files with 576 additions and 115 deletions
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2
CMakeModules/GenerateSCMRev.cmake
View file

@ -102,6 +102,8 @@ set(HASH_FILES
"${VIDEO_CORE}/shader/shader_ir.cpp"
"${VIDEO_CORE}/shader/shader_ir.h"
"${VIDEO_CORE}/shader/track.cpp"
"${VIDEO_CORE}/shader/transform_feedback.cpp"
"${VIDEO_CORE}/shader/transform_feedback.h"
)
set(COMBINED "")
foreach (F IN LISTS HASH_FILES)

2
src/common/CMakeLists.txt
View file

@ -83,6 +83,8 @@ add_custom_command(OUTPUT scm_rev.cpp
"${VIDEO_CORE}/shader/shader_ir.cpp"
"${VIDEO_CORE}/shader/shader_ir.h"
"${VIDEO_CORE}/shader/track.cpp"
"${VIDEO_CORE}/shader/transform_feedback.cpp"
"${VIDEO_CORE}/shader/transform_feedback.h"
# and also check that the scm_rev files haven't changed
"${CMAKE_CURRENT_SOURCE_DIR}/scm_rev.cpp.in"
"${CMAKE_CURRENT_SOURCE_DIR}/scm_rev.h"

2
src/video_core/CMakeLists.txt
View file

@ -129,6 +129,8 @@ add_library(video_core STATIC
shader/shader_ir.cpp
shader/shader_ir.h
shader/track.cpp
shader/transform_feedback.cpp
shader/transform_feedback.h
surface.cpp
surface.h
texture_cache/format_lookup_table.cpp

15
src/video_core/engines/maxwell_3d.h
View file

@ -628,19 +628,26 @@ public:
float depth_range_far;
};
struct alignas(32) TransformFeedbackBinding {
struct TransformFeedbackBinding {
u32 buffer_enable;
u32 address_high;
u32 address_low;
s32 buffer_size;
s32 buffer_offset;
INSERT_UNION_PADDING_WORDS(3);
GPUVAddr Address() const {
return static_cast<GPUVAddr>((static_cast<GPUVAddr>(address_high) << 32) |
address_low);
}
};
static_assert(sizeof(TransformFeedbackBinding) == 32);
struct alignas(16) TransformFeedbackLayout {
struct TransformFeedbackLayout {
u32 stream;
u32 varying_count;
u32 stride;
INSERT_UNION_PADDING_WORDS(1);
};
static_assert(sizeof(TransformFeedbackLayout) == 16);
@ -652,6 +659,10 @@ public:
return shader_config[index].enable != 0;
}
bool IsShaderConfigEnabled(Regs::ShaderProgram type) const {
return IsShaderConfigEnabled(static_cast<std::size_t>(type));
}
union {
struct {
INSERT_UNION_PADDING_WORDS(0x45);

70
src/video_core/renderer_opengl/gl_rasterizer.cpp
View file

@ -496,7 +496,6 @@ void RasterizerOpenGL::Draw(bool is_indexed, bool is_instanced) {
SyncCullMode();
SyncPrimitiveRestart();
SyncScissorTest();
SyncTransformFeedback();
SyncPointState();
SyncPolygonOffset();
SyncAlphaTest();
@ -569,7 +568,7 @@ void RasterizerOpenGL::Draw(bool is_indexed, bool is_instanced) {
glTextureBarrier();
}
++num_queued_commands;
BeginTransformFeedback(primitive_mode);
const GLuint base_instance = static_cast<GLuint>(gpu.regs.vb_base_instance);
const GLsizei num_instances =
@ -608,6 +607,10 @@ void RasterizerOpenGL::Draw(bool is_indexed, bool is_instanced) {
num_instances, base_instance);
}
}
EndTransformFeedback();
++num_queued_commands;
}
void RasterizerOpenGL::DispatchCompute(GPUVAddr code_addr) {
@ -1290,11 +1293,6 @@ void RasterizerOpenGL::SyncScissorTest() {
}
}
void RasterizerOpenGL::SyncTransformFeedback() {
const auto& regs = system.GPU().Maxwell3D().regs;
UNIMPLEMENTED_IF_MSG(regs.tfb_enabled != 0, "Transform feedbacks are not implemented");
}
void RasterizerOpenGL::SyncPointState() {
auto& gpu = system.GPU().Maxwell3D();
auto& flags = gpu.dirty.flags;
@ -1370,4 +1368,62 @@ void RasterizerOpenGL::SyncFramebufferSRGB() {
oglEnable(GL_FRAMEBUFFER_SRGB, gpu.regs.framebuffer_srgb);
}
void RasterizerOpenGL::BeginTransformFeedback(GLenum primitive_mode) {
const auto& regs = system.GPU().Maxwell3D().regs;
if (regs.tfb_enabled == 0) {
return;
}
UNIMPLEMENTED_IF(regs.IsShaderConfigEnabled(Maxwell::ShaderProgram::TesselationControl) ||
regs.IsShaderConfigEnabled(Maxwell::ShaderProgram::TesselationEval) ||
regs.IsShaderConfigEnabled(Maxwell::ShaderProgram::Geometry));
for (std::size_t index = 0; index < Maxwell::NumTransformFeedbackBuffers; ++index) {
const auto& binding = regs.tfb_bindings[index];
if (!binding.buffer_enable) {
if (enabled_transform_feedback_buffers[index]) {
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER, static_cast<GLuint>(index), 0, 0,
0);
}
enabled_transform_feedback_buffers[index] = false;
continue;
}
enabled_transform_feedback_buffers[index] = true;
auto& tfb_buffer = transform_feedback_buffers[index];
tfb_buffer.Create();
const GLuint handle = tfb_buffer.handle;
const std::size_t size = binding.buffer_size;
glNamedBufferData(handle, static_cast<GLsizeiptr>(size), nullptr, GL_STREAM_COPY);
glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER, static_cast<GLuint>(index), handle, 0,
static_cast<GLsizeiptr>(size));
}
glBeginTransformFeedback(GL_POINTS);
}
void RasterizerOpenGL::EndTransformFeedback() {
const auto& regs = system.GPU().Maxwell3D().regs;
if (regs.tfb_enabled == 0) {
return;
}
glEndTransformFeedback();
for (std::size_t index = 0; index < Maxwell::NumTransformFeedbackBuffers; ++index) {
const auto& binding = regs.tfb_bindings[index];
if (!binding.buffer_enable) {
continue;
}
UNIMPLEMENTED_IF(binding.buffer_offset != 0);
const GLuint handle = transform_feedback_buffers[index].handle;
const GPUVAddr gpu_addr = binding.Address();
const std::size_t size = binding.buffer_size;
const auto [dest_buffer, offset] = buffer_cache.UploadMemory(gpu_addr, size, 4, true);
glCopyNamedBufferSubData(handle, *dest_buffer, 0, offset, static_cast<GLsizeiptr>(size));
}
}
} // namespace OpenGL

14
src/video_core/renderer_opengl/gl_rasterizer.h
View file

@ -168,9 +168,6 @@ private:
/// Syncs the scissor test state to match the guest state
void SyncScissorTest();
/// Syncs the transform feedback state to match the guest state
void SyncTransformFeedback();
/// Syncs the point state to match the guest state
void SyncPointState();
@ -192,6 +189,12 @@ private:
/// Syncs the framebuffer sRGB state to match the guest state
void SyncFramebufferSRGB();
/// Begin a transform feedback
void BeginTransformFeedback(GLenum primitive_mode);
/// End a transform feedback
void EndTransformFeedback();
/// Check for extension that are not strictly required but are needed for correct emulation
void CheckExtensions();
@ -229,6 +232,11 @@ private:
BindBuffersRangePushBuffer bind_ubo_pushbuffer{GL_UNIFORM_BUFFER};
BindBuffersRangePushBuffer bind_ssbo_pushbuffer{GL_SHADER_STORAGE_BUFFER};
std::array<OGLBuffer, Tegra::Engines::Maxwell3D::Regs::NumTransformFeedbackBuffers>
transform_feedback_buffers;
std::bitset<Tegra::Engines::Maxwell3D::Regs::NumTransformFeedbackBuffers>
enabled_transform_feedback_buffers;
/// Number of commands queued to the OpenGL driver. Reseted on flush.
std::size_t num_queued_commands = 0;

138
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View file

@ -23,6 +23,7 @@
#include "video_core/shader/ast.h"
#include "video_core/shader/node.h"
#include "video_core/shader/shader_ir.h"
#include "video_core/shader/transform_feedback.h"
namespace OpenGL {
@ -36,6 +37,7 @@ using Tegra::Shader::IpaInterpMode;
using Tegra::Shader::IpaMode;
using Tegra::Shader::IpaSampleMode;
using Tegra::Shader::Register;
using VideoCommon::Shader::BuildTransformFeedback;
using VideoCommon::Shader::Registry;
using namespace std::string_literals;
@ -49,6 +51,11 @@ class ExprDecompiler;
enum class Type { Void, Bool, Bool2, Float, Int, Uint, HalfFloat };
constexpr std::array FLOAT_TYPES{"float", "vec2", "vec3", "vec4"};
constexpr std::string_view INPUT_ATTRIBUTE_NAME = "in_attr";
constexpr std::string_view OUTPUT_ATTRIBUTE_NAME = "out_attr";
struct TextureOffset {};
struct TextureDerivates {};
using TextureArgument = std::pair<Type, Node>;
@ -390,12 +397,22 @@ std::string FlowStackTopName(MetaStackClass stack) {
return stage == ShaderType::Vertex;
}
struct GenericVaryingDescription {
std::string name;
u8 first_element = 0;
bool is_scalar = false;
};
class GLSLDecompiler final {
public:
explicit GLSLDecompiler(const Device& device, const ShaderIR& ir, const Registry& registry,
ShaderType stage, std::string_view identifier, std::string_view suffix)
: device{device}, ir{ir}, registry{registry}, stage{stage},
identifier{identifier}, suffix{suffix}, header{ir.GetHeader()} {}
identifier{identifier}, suffix{suffix}, header{ir.GetHeader()} {
if (stage != ShaderType::Compute) {
transform_feedback = BuildTransformFeedback(registry.GetGraphicsInfo());
}
}
void Decompile() {
DeclareHeader();
@ -403,17 +420,17 @@ public:
DeclareGeometry();
DeclareFragment();
DeclareCompute();
DeclareRegisters();
DeclareCustomVariables();
DeclarePredicates();
DeclareLocalMemory();
DeclareInternalFlags();
DeclareInputAttributes();
DeclareOutputAttributes();
DeclareConstantBuffers();
DeclareGlobalMemory();
DeclareSamplers();
DeclareImages();
DeclareSamplers();
DeclareGlobalMemory();
DeclareConstantBuffers();
DeclareLocalMemory();
DeclareRegisters();
DeclarePredicates();
DeclareInternalFlags();
DeclareCustomVariables();
DeclarePhysicalAttributeReader();
code.AddLine("void main() {{");
@ -485,7 +502,7 @@ private:
if (!identifier.empty()) {
code.AddLine("// {}", identifier);
}
code.AddLine("#version 430 core");
code.AddLine("#version 440 core");
code.AddLine("#extension GL_ARB_separate_shader_objects : enable");
if (device.HasShaderBallot()) {
code.AddLine("#extension GL_ARB_shader_ballot : require");
@ -570,7 +587,13 @@ private:
code.AddLine("out gl_PerVertex {{");
++code.scope;
code.AddLine("vec4 gl_Position;");
auto pos_xfb = GetTransformFeedbackDecoration(Attribute::Index::Position);
if (!pos_xfb.empty()) {
pos_xfb = fmt::format("layout ({}) ", pos_xfb);
}
const char* pos_type =
FLOAT_TYPES.at(GetNumComponents(Attribute::Index::Position).value_or(4) - 1);
code.AddLine("{}{} gl_Position;", pos_xfb, pos_type);
for (const auto attribute : ir.GetOutputAttributes()) {
if (attribute == Attribute::Index::ClipDistances0123 ||
@ -703,7 +726,7 @@ private:
void DeclareInputAttribute(Attribute::Index index, bool skip_unused) {
const u32 location{GetGenericAttributeIndex(index)};
std::string name{GetInputAttribute(index)};
std::string name{GetGenericInputAttribute(index)};
if (stage == ShaderType::Geometry) {
name = "gs_" + name + "[]";
}
@ -740,9 +763,59 @@ private:
}
}
std::optional<std::size_t> GetNumComponents(Attribute::Index index, u8 element = 0) const {
const u8 location = static_cast<u8>(static_cast<u32>(index) * 4 + element);
const auto it = transform_feedback.find(location);
if (it == transform_feedback.end()) {
return {};
}
return it->second.components;
}
std::string GetTransformFeedbackDecoration(Attribute::Index index, u8 element = 0) const {
const u8 location = static_cast<u8>(static_cast<u32>(index) * 4 + element);
const auto it = transform_feedback.find(location);
if (it == transform_feedback.end()) {
return {};
}
const VaryingTFB& tfb = it->second;
return fmt::format("xfb_buffer = {}, xfb_offset = {}, xfb_stride = {}", tfb.buffer,
tfb.offset, tfb.stride);
}
void DeclareOutputAttribute(Attribute::Index index) {
const u32 location{GetGenericAttributeIndex(index)};
code.AddLine("layout (location = {}) out vec4 {};", location, GetOutputAttribute(index));
static constexpr std::string_view swizzle = "xyzw";
u8 element = 0;
while (element < 4) {
auto xfb = GetTransformFeedbackDecoration(index, element);
if (!xfb.empty()) {
xfb = fmt::format(", {}", xfb);
}
const std::size_t remainder = 4 - element;
const std::size_t num_components = GetNumComponents(index, element).value_or(remainder);
const char* const type = FLOAT_TYPES.at(num_components - 1);
const u32 location = GetGenericAttributeIndex(index);
GenericVaryingDescription description;
description.first_element = static_cast<u8>(element);
description.is_scalar = num_components == 1;
description.name = AppendSuffix(location, OUTPUT_ATTRIBUTE_NAME);
if (element != 0 || num_components != 4) {
const std::string_view name_swizzle = swizzle.substr(element, num_components);
description.name = fmt::format("{}_{}", description.name, name_swizzle);
}
for (std::size_t i = 0; i < num_components; ++i) {
const u8 offset = static_cast<u8>(location * 4 + element + i);
varying_description.insert({offset, description});
}
code.AddLine("layout (location = {}, component = {}{}) out {} {};", location, element,
xfb, type, description.name);
element = static_cast<u8>(static_cast<std::size_t>(element) + num_components);
}
}
void DeclareConstantBuffers() {
@ -1095,7 +1168,7 @@ private:
return {"0", Type::Int};
default:
if (IsGenericAttribute(attribute)) {
return {GeometryPass(GetInputAttribute(attribute)) + GetSwizzle(element),
return {GeometryPass(GetGenericInputAttribute(attribute)) + GetSwizzle(element),
Type::Float};
}
break;
@ -1164,8 +1237,7 @@ private:
return {{fmt::format("gl_ClipDistance[{}]", abuf->GetElement() + 4), Type::Float}};
default:
if (IsGenericAttribute(attribute)) {
return {
{GetOutputAttribute(attribute) + GetSwizzle(abuf->GetElement()), Type::Float}};
return {{GetGenericOutputAttribute(attribute, abuf->GetElement()), Type::Float}};
}
UNIMPLEMENTED_MSG("Unhandled output attribute: {}", static_cast<u32>(attribute));
return {};
@ -2376,27 +2448,34 @@ private:
static_assert(operation_decompilers.size() == static_cast<std::size_t>(OperationCode::Amount));
std::string GetRegister(u32 index) const {
return GetDeclarationWithSuffix(index, "gpr");
return AppendSuffix(index, "gpr");
}
std::string GetCustomVariable(u32 index) const {
return GetDeclarationWithSuffix(index, "custom_var");
return AppendSuffix(index, "custom_var");
}
std::string GetPredicate(Tegra::Shader::Pred pred) const {
return GetDeclarationWithSuffix(static_cast<u32>(pred), "pred");
return AppendSuffix(static_cast<u32>(pred), "pred");
}
std::string GetInputAttribute(Attribute::Index attribute) const {
return GetDeclarationWithSuffix(GetGenericAttributeIndex(attribute), "input_attr");
std::string GetGenericInputAttribute(Attribute::Index attribute) const {
return AppendSuffix(GetGenericAttributeIndex(attribute), INPUT_ATTRIBUTE_NAME);
}
std::string GetOutputAttribute(Attribute::Index attribute) const {
return GetDeclarationWithSuffix(GetGenericAttributeIndex(attribute), "output_attr");
std::unordered_map<u8, GenericVaryingDescription> varying_description;
std::string GetGenericOutputAttribute(Attribute::Index attribute, std::size_t element) const {
const u8 offset = static_cast<u8>(GetGenericAttributeIndex(attribute) * 4 + element);
const auto& description = varying_description.at(offset);
if (description.is_scalar) {
return description.name;
}
return fmt::format("{}[{}]", description.name, element - description.first_element);
}
std::string GetConstBuffer(u32 index) const {
return GetDeclarationWithSuffix(index, "cbuf");
return AppendSuffix(index, "cbuf");
}
std::string GetGlobalMemory(const GlobalMemoryBase& descriptor) const {
@ -2409,7 +2488,7 @@ private:
}
std::string GetConstBufferBlock(u32 index) const {
return GetDeclarationWithSuffix(index, "cbuf_block");
return AppendSuffix(index, "cbuf_block");
}
std::string GetLocalMemory() const {
@ -2434,14 +2513,14 @@ private:
}
std::string GetSampler(const Sampler& sampler) const {
return GetDeclarationWithSuffix(static_cast<u32>(sampler.GetIndex()), "sampler");
return AppendSuffix(static_cast<u32>(sampler.GetIndex()), "sampler");
}
std::string GetImage(const Image& image) const {
return GetDeclarationWithSuffix(static_cast<u32>(image.GetIndex()), "image");
return AppendSuffix(static_cast<u32>(image.GetIndex()), "image");
}
std::string GetDeclarationWithSuffix(u32 index, std::string_view name) const {
std::string AppendSuffix(u32 index, std::string_view name) const {
if (suffix.empty()) {
return fmt::format("{}{}", name, index);
} else {
@ -2477,6 +2556,7 @@ private:
const std::string_view identifier;
const std::string_view suffix;
const Header header;
std::unordered_map<u8, VaryingTFB> transform_feedback;
ShaderWriter code;

47
src/video_core/renderer_vulkan/vk_device.cpp
View file

@ -107,8 +107,7 @@ bool VKDevice::Create(const vk::DispatchLoaderDynamic& dldi, vk::Instance instan
features.occlusionQueryPrecise = true;
features.fragmentStoresAndAtomics = true;
features.shaderImageGatherExtended = true;
features.shaderStorageImageReadWithoutFormat =
is_shader_storage_img_read_without_format_supported;
features.shaderStorageImageReadWithoutFormat = is_formatless_image_load_supported;
features.shaderStorageImageWriteWithoutFormat = true;
features.textureCompressionASTC_LDR = is_optimal_astc_supported;
@ -148,6 +147,15 @@ bool VKDevice::Create(const vk::DispatchLoaderDynamic& dldi, vk::Instance instan
LOG_INFO(Render_Vulkan, "Device doesn't support uint8 indexes");
}
vk::PhysicalDeviceTransformFeedbackFeaturesEXT transform_feedback;
if (ext_transform_feedback) {
transform_feedback.transformFeedback = true;
transform_feedback.geometryStreams = true;
SetNext(next, transform_feedback);
} else {
LOG_INFO(Render_Vulkan, "Device doesn't support transform feedbacks");
}
if (!ext_depth_range_unrestricted) {
LOG_INFO(Render_Vulkan, "Device doesn't support depth range unrestricted");
}
@ -385,7 +393,7 @@ std::vector<const char*> VKDevice::LoadExtensions(const vk::DispatchLoaderDynami
}
};
extensions.reserve(14);
extensions.reserve(15);
extensions.push_back(VK_KHR_SWAPCHAIN_EXTENSION_NAME);
extensions.push_back(VK_KHR_16BIT_STORAGE_EXTENSION_NAME);
extensions.push_back(VK_KHR_8BIT_STORAGE_EXTENSION_NAME);
@ -397,18 +405,22 @@ std::vector<const char*> VKDevice::LoadExtensions(const vk::DispatchLoaderDynami
[[maybe_unused]] const bool nsight =
std::getenv("NVTX_INJECTION64_PATH") || std::getenv("NSIGHT_LAUNCHED");
bool khr_shader_float16_int8{};
bool ext_subgroup_size_control{};
bool has_khr_shader_float16_int8{};
bool has_ext_subgroup_size_control{};
bool has_ext_transform_feedback{};
for (const auto& extension : physical.enumerateDeviceExtensionProperties(nullptr, dldi)) {
Test(extension, khr_uniform_buffer_standard_layout,
VK_KHR_UNIFORM_BUFFER_STANDARD_LAYOUT_EXTENSION_NAME, true);
Test(extension, khr_shader_float16_int8, VK_KHR_SHADER_FLOAT16_INT8_EXTENSION_NAME, false);
Test(extension, has_khr_shader_float16_int8, VK_KHR_SHADER_FLOAT16_INT8_EXTENSION_NAME,
false);
Test(extension, ext_depth_range_unrestricted,
VK_EXT_DEPTH_RANGE_UNRESTRICTED_EXTENSION_NAME, true);
Test(extension, ext_index_type_uint8, VK_EXT_INDEX_TYPE_UINT8_EXTENSION_NAME, true);
Test(extension, ext_shader_viewport_index_layer,
VK_EXT_SHADER_VIEWPORT_INDEX_LAYER_EXTENSION_NAME, true);
Test(extension, ext_subgroup_size_control, VK_EXT_SUBGROUP_SIZE_CONTROL_EXTENSION_NAME,
Test(extension, has_ext_subgroup_size_control, VK_EXT_SUBGROUP_SIZE_CONTROL_EXTENSION_NAME,
false);
Test(extension, has_ext_transform_feedback, VK_EXT_TRANSFORM_FEEDBACK_EXTENSION_NAME,
false);
if (Settings::values.renderer_debug) {
Test(extension, nv_device_diagnostic_checkpoints,
@ -416,13 +428,13 @@ std::vector<const char*> VKDevice::LoadExtensions(const vk::DispatchLoaderDynami
}
}
if (khr_shader_float16_int8) {
if (has_khr_shader_float16_int8) {
is_float16_supported =
GetFeatures<vk::PhysicalDeviceFloat16Int8FeaturesKHR>(physical, dldi).shaderFloat16;
extensions.push_back(VK_KHR_SHADER_FLOAT16_INT8_EXTENSION_NAME);
}
if (ext_subgroup_size_control) {
if (has_ext_subgroup_size_control) {
const auto features =
GetFeatures<vk::PhysicalDeviceSubgroupSizeControlFeaturesEXT>(physical, dldi);
const auto properties =
@ -439,6 +451,20 @@ std::vector<const char*> VKDevice::LoadExtensions(const vk::DispatchLoaderDynami
is_warp_potentially_bigger = true;
}
if (has_ext_transform_feedback) {
const auto features =
GetFeatures<vk::PhysicalDeviceTransformFeedbackFeaturesEXT>(physical, dldi);
const auto properties =
GetProperties<vk::PhysicalDeviceTransformFeedbackPropertiesEXT>(physical, dldi);
if (features.transformFeedback && features.geometryStreams &&
properties.maxTransformFeedbackStreams >= 4 && properties.maxTransformFeedbackBuffers &&
properties.transformFeedbackQueries && properties.transformFeedbackDraw) {
extensions.push_back(VK_EXT_TRANSFORM_FEEDBACK_EXTENSION_NAME);
ext_transform_feedback = true;
}
}
return extensions;
}
@ -467,8 +493,7 @@ void VKDevice::SetupFamilies(const vk::DispatchLoaderDynamic& dldi, vk::SurfaceK
void VKDevice::SetupFeatures(const vk::DispatchLoaderDynamic& dldi) {
const auto supported_features{physical.getFeatures(dldi)};
is_shader_storage_img_read_without_format_supported =
supported_features.shaderStorageImageReadWithoutFormat;
is_formatless_image_load_supported = supported_features.shaderStorageImageReadWithoutFormat;
is_optimal_astc_supported = IsOptimalAstcSupported(supported_features, dldi);
}

45
src/video_core/renderer_vulkan/vk_device.h
View file

@ -122,11 +122,6 @@ public:
return properties.limits.maxPushConstantsSize;
}
/// Returns true if Shader storage Image Read Without Format supported.
bool IsShaderStorageImageReadWithoutFormatSupported() const {
return is_shader_storage_img_read_without_format_supported;
}
/// Returns true if ASTC is natively supported.
bool IsOptimalAstcSupported() const {
return is_optimal_astc_supported;
@ -147,6 +142,11 @@ public:
return (guest_warp_stages & stage) != vk::ShaderStageFlags{};
}
/// Returns true if formatless image load is supported.
bool IsFormatlessImageLoadSupported() const {
return is_formatless_image_load_supported;
}
/// Returns true if the device supports VK_EXT_scalar_block_layout.
bool IsKhrUniformBufferStandardLayoutSupported() const {
return khr_uniform_buffer_standard_layout;
@ -167,6 +167,11 @@ public:
return ext_shader_viewport_index_layer;
}
/// Returns true if the device supports VK_EXT_transform_feedback.
bool IsExtTransformFeedbackSupported() const {
return ext_transform_feedback;
}
/// Returns true if the device supports VK_NV_device_diagnostic_checkpoints.
bool IsNvDeviceDiagnosticCheckpoints() const {
return nv_device_diagnostic_checkpoints;
@ -214,26 +219,26 @@ private:
static std::unordered_map<vk::Format, vk::FormatProperties> GetFormatProperties(
const vk::DispatchLoaderDynamic& dldi, vk::PhysicalDevice physical);
const vk::PhysicalDevice physical; ///< Physical device.
vk::DispatchLoaderDynamic dld; ///< Device function pointers.
vk::PhysicalDeviceProperties properties; ///< Device properties.
UniqueDevice logical; ///< Logical device.
vk::Queue graphics_queue; ///< Main graphics queue.
vk::Queue present_queue; ///< Main present queue.
u32 graphics_family{}; ///< Main graphics queue family index.
u32 present_family{}; ///< Main present queue family index.
vk::DriverIdKHR driver_id{}; ///< Driver ID.
vk::ShaderStageFlags guest_warp_stages{}; ///< Stages where the guest warp size can be forced.
bool is_optimal_astc_supported{}; ///< Support for native ASTC.
bool is_float16_supported{}; ///< Support for float16 arithmetics.
bool is_warp_potentially_bigger{}; ///< Host warp size can be bigger than guest.
const vk::PhysicalDevice physical; ///< Physical device.
vk::DispatchLoaderDynamic dld; ///< Device function pointers.
vk::PhysicalDeviceProperties properties; ///< Device properties.
UniqueDevice logical; ///< Logical device.
vk::Queue graphics_queue; ///< Main graphics queue.
vk::Queue present_queue; ///< Main present queue.
u32 graphics_family{}; ///< Main graphics queue family index.
u32 present_family{}; ///< Main present queue family index.
vk::DriverIdKHR driver_id{}; ///< Driver ID.
vk::ShaderStageFlags guest_warp_stages{}; ///< Stages where the guest warp size can be forced.ed
bool is_optimal_astc_supported{}; ///< Support for native ASTC.
bool is_float16_supported{}; ///< Support for float16 arithmetics.
bool is_warp_potentially_bigger{}; ///< Host warp size can be bigger than guest.
bool is_formatless_image_load_supported{}; ///< Support for shader image read without format.
bool khr_uniform_buffer_standard_layout{}; ///< Support for std430 on UBOs.
bool ext_index_type_uint8{}; ///< Support for VK_EXT_index_type_uint8.
bool ext_depth_range_unrestricted{}; ///< Support for VK_EXT_depth_range_unrestricted.
bool ext_shader_viewport_index_layer{}; ///< Support for VK_EXT_shader_viewport_index_layer.
bool ext_transform_feedback{}; ///< Support for VK_EXT_transform_feedback.
bool nv_device_diagnostic_checkpoints{}; ///< Support for VK_NV_device_diagnostic_checkpoints.
bool is_shader_storage_img_read_without_format_supported{}; ///< Support for shader storage
///< image read without format
// Telemetry parameters
std::string vendor_name; ///< Device's driver name.

17
src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
View file

@ -273,9 +273,9 @@ VKComputePipeline& VKPipelineCache::GetComputePipeline(const ComputePipelineCach
specialization.workgroup_size = key.workgroup_size;
specialization.shared_memory_size = key.shared_memory_size;
const SPIRVShader spirv_shader{
Decompile(device, shader->GetIR(), ShaderType::Compute, specialization),
shader->GetEntries()};
const SPIRVShader spirv_shader{Decompile(device, shader->GetIR(), ShaderType::Compute,
shader->GetRegistry(), specialization),
shader->GetEntries()};
entry = std::make_unique<VKComputePipeline>(device, scheduler, descriptor_pool,
update_descriptor_queue, spirv_shader);
return *entry;
@ -324,8 +324,7 @@ VKPipelineCache::DecompileShaders(const GraphicsPipelineCacheKey& key) {
const auto& gpu = system.GPU().Maxwell3D();
Specialization specialization;
specialization.primitive_topology = fixed_state.input_assembly.topology;
if (specialization.primitive_topology == Maxwell::PrimitiveTopology::Points) {
if (fixed_state.input_assembly.topology == Maxwell::PrimitiveTopology::Points) {
ASSERT(fixed_state.input_assembly.point_size != 0.0f);
specialization.point_size = fixed_state.input_assembly.point_size;
}
@ -333,9 +332,6 @@ VKPipelineCache::DecompileShaders(const GraphicsPipelineCacheKey& key) {
specialization.attribute_types[i] = fixed_state.vertex_input.attributes[i].type;
}
specialization.ndc_minus_one_to_one = fixed_state.rasterizer.ndc_minus_one_to_one;
specialization.tessellation.primitive = fixed_state.tessellation.primitive;
specialization.tessellation.spacing = fixed_state.tessellation.spacing;
specialization.tessellation.clockwise = fixed_state.tessellation.clockwise;
SPIRVProgram program;
std::vector<vk::DescriptorSetLayoutBinding> bindings;
@ -356,8 +352,9 @@ VKPipelineCache::DecompileShaders(const GraphicsPipelineCacheKey& key) {
const std::size_t stage = index == 0 ? 0 : index - 1; // Stage indices are 0 - 5
const auto program_type = GetShaderType(program_enum);
const auto& entries = shader->GetEntries();
program[stage] = {Decompile(device, shader->GetIR(), program_type, specialization),
entries};
program[stage] = {
Decompile(device, shader->GetIR(), program_type, shader->GetRegistry(), specialization),
entries};
if (program_enum == Maxwell::ShaderProgram::VertexA) {
// VertexB was combined with VertexA, so we skip the VertexB iteration

4
src/video_core/renderer_vulkan/vk_pipeline_cache.h
View file

@ -132,6 +132,10 @@ public:
return shader_ir;
}
const VideoCommon::Shader::Registry& GetRegistry() const {
return registry;
}
const VideoCommon::Shader::ShaderIR& GetIR() const {
return shader_ir;
}

42
src/video_core/renderer_vulkan/vk_rasterizer.cpp
View file

@ -347,6 +347,8 @@ void RasterizerVulkan::Draw(bool is_indexed, bool is_instanced) {
[&pipeline](auto cmdbuf, auto& dld) { cmdbuf.setCheckpointNV(&pipeline, dld); });
}
BeginTransformFeedback();
const auto pipeline_layout = pipeline.GetLayout();
const auto descriptor_set = pipeline.CommitDescriptorSet();
scheduler.Record([pipeline_layout, descriptor_set, draw_params](auto cmdbuf, auto& dld) {
@ -356,6 +358,8 @@ void RasterizerVulkan::Draw(bool is_indexed, bool is_instanced) {
}
draw_params.Draw(cmdbuf, dld);
});
EndTransformFeedback();
}
void RasterizerVulkan::Clear() {
@ -738,6 +742,44 @@ void RasterizerVulkan::UpdateDynamicStates() {
UpdateStencilFaces(regs);
}
void RasterizerVulkan::BeginTransformFeedback() {
const auto& regs = system.GPU().Maxwell3D().regs;
if (regs.tfb_enabled == 0) {
return;
}
UNIMPLEMENTED_IF(regs.IsShaderConfigEnabled(Maxwell::ShaderProgram::TesselationControl) ||
regs.IsShaderConfigEnabled(Maxwell::ShaderProgram::TesselationEval) ||
regs.IsShaderConfigEnabled(Maxwell::ShaderProgram::Geometry));
UNIMPLEMENTED_IF(regs.tfb_bindings[1].buffer_enable);
UNIMPLEMENTED_IF(regs.tfb_bindings[2].buffer_enable);
UNIMPLEMENTED_IF(regs.tfb_bindings[3].buffer_enable);
const auto& binding = regs.tfb_bindings[0];
UNIMPLEMENTED_IF(binding.buffer_enable == 0);
UNIMPLEMENTED_IF(binding.buffer_offset != 0);
const GPUVAddr gpu_addr = binding.Address();
const std::size_t size = binding.buffer_size;
const auto [buffer, offset] = buffer_cache.UploadMemory(gpu_addr, size, 4, true);
scheduler.Record([buffer = *buffer, offset = offset, size](auto cmdbuf, auto& dld) {
cmdbuf.bindTransformFeedbackBuffersEXT(0, {buffer}, {offset}, {size}, dld);
cmdbuf.beginTransformFeedbackEXT(0, {}, {}, dld);
});
}
void RasterizerVulkan::EndTransformFeedback() {
const auto& regs = system.GPU().Maxwell3D().regs;
if (regs.tfb_enabled == 0) {
return;
}
scheduler.Record(
[](auto cmdbuf, auto& dld) { cmdbuf.endTransformFeedbackEXT(0, {}, {}, dld); });
}
void RasterizerVulkan::SetupVertexArrays(FixedPipelineState::VertexInput& vertex_input,
BufferBindings& buffer_bindings) {
const auto& regs = system.GPU().Maxwell3D().regs;

4
src/video_core/renderer_vulkan/vk_rasterizer.h
View file

@ -169,6 +169,10 @@ private:
void UpdateDynamicStates();
void BeginTransformFeedback();
void EndTransformFeedback();
bool WalkAttachmentOverlaps(const CachedSurfaceView& attachment);
void SetupVertexArrays(FixedPipelineState::VertexInput& vertex_input,

138
src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
View file

@ -5,7 +5,9 @@
#include <functional>
#include <limits>
#include <map>
#include <optional>
#include <type_traits>
#include <unordered_map>
#include <utility>
#include <fmt/format.h>
@ -24,6 +26,7 @@
#include "video_core/renderer_vulkan/vk_shader_decompiler.h"
#include "video_core/shader/node.h"
#include "video_core/shader/shader_ir.h"
#include "video_core/shader/transform_feedback.h"
namespace Vulkan {
@ -93,6 +96,12 @@ struct VertexIndices {
std::optional<u32> clip_distances;
};
struct GenericVaryingDescription {
Id id = nullptr;
u32 first_element = 0;
bool is_scalar = false;
};
spv::Dim GetSamplerDim(const Sampler& sampler) {
ASSERT(!sampler.IsBuffer());
switch (sampler.GetType()) {
@ -266,9 +275,13 @@ bool IsPrecise(Operation operand) {
class SPIRVDecompiler final : public Sirit::Module {
public:
explicit SPIRVDecompiler(const VKDevice& device, const ShaderIR& ir, ShaderType stage,
const Specialization& specialization)
const Registry& registry, const Specialization& specialization)
: Module(0x00010300), device{device}, ir{ir}, stage{stage}, header{ir.GetHeader()},
specialization{specialization} {
registry{registry}, specialization{specialization} {
if (stage != ShaderType::Compute) {
transform_feedback = BuildTransformFeedback(registry.GetGraphicsInfo());
}
AddCapability(spv::Capability::Shader);
AddCapability(spv::Capability::UniformAndStorageBuffer16BitAccess);
AddCapability(spv::Capability::ImageQuery);
@ -286,6 +299,15 @@ public:
AddExtension("SPV_KHR_variable_pointers");
AddExtension("SPV_KHR_shader_draw_parameters");
if (!transform_feedback.empty()) {
if (device.IsExtTransformFeedbackSupported()) {
AddCapability(spv::Capability::TransformFeedback);
} else {
LOG_ERROR(Render_Vulkan, "Shader requires transform feedbacks but these are not "
"supported on this device");
}
}
if (ir.UsesLayer() || ir.UsesViewportIndex()) {
if (ir.UsesViewportIndex()) {
AddCapability(spv::Capability::MultiViewport);
@ -296,7 +318,7 @@ public:
}
}
if (device.IsShaderStorageImageReadWithoutFormatSupported()) {
if (device.IsFormatlessImageLoadSupported()) {
AddCapability(spv::Capability::StorageImageReadWithoutFormat);
}
@ -318,25 +340,29 @@ public:
AddExecutionMode(main, spv::ExecutionMode::OutputVertices,
header.common2.threads_per_input_primitive);
break;
case ShaderType::TesselationEval:
case ShaderType::TesselationEval: {
const auto& info = registry.GetGraphicsInfo();
AddCapability(spv::Capability::Tessellation);
AddEntryPoint(spv::ExecutionModel::TessellationEvaluation, main, "main", interfaces);
AddExecutionMode(main, GetExecutionMode(specialization.tessellation.primitive));
AddExecutionMode(main, GetExecutionMode(specialization.tessellation.spacing));
AddExecutionMode(main, specialization.tessellation.clockwise
AddExecutionMode(main, GetExecutionMode(info.tessellation_primitive));
AddExecutionMode(main, GetExecutionMode(info.tessellation_spacing));
AddExecutionMode(main, info.tessellation_clockwise
? spv::ExecutionMode::VertexOrderCw
: spv::ExecutionMode::VertexOrderCcw);
break;
case ShaderType::Geometry:
}
case ShaderType::Geometry: {
const auto& info = registry.GetGraphicsInfo();
AddCapability(spv::Capability::Geometry);
AddEntryPoint(spv::ExecutionModel::Geometry, main, "main", interfaces);
AddExecutionMode(main, GetExecutionMode(specialization.primitive_topology));
AddExecutionMode(main, GetExecutionMode(info.primitive_topology));
AddExecutionMode(main, GetExecutionMode(header.common3.output_topology));
AddExecutionMode(main, spv::ExecutionMode::OutputVertices,
header.common4.max_output_vertices);
// TODO(Rodrigo): Where can we get this info from?
AddExecutionMode(main, spv::ExecutionMode::Invocations, 1U);
break;
}
case ShaderType::Fragment:
AddEntryPoint(spv::ExecutionModel::Fragment, main, "main", interfaces);
AddExecutionMode(main, spv::ExecutionMode::OriginUpperLeft);
@ -545,7 +571,8 @@ private:
if (stage != ShaderType::Geometry) {
return;
}
const u32 num_input = GetNumPrimitiveTopologyVertices(specialization.primitive_topology);
const auto& info = registry.GetGraphicsInfo();
const u32 num_input = GetNumPrimitiveTopologyVertices(info.primitive_topology);
DeclareInputVertexArray(num_input);
DeclareOutputVertex();
}
@ -742,12 +769,34 @@ private:
}
void DeclareOutputAttributes() {
if (stage == ShaderType::Compute || stage == ShaderType::Fragment) {
return;
}
UNIMPLEMENTED_IF(registry.GetGraphicsInfo().tfb_enabled && stage != ShaderType::Vertex);
for (const auto index : ir.GetOutputAttributes()) {
if (!IsGenericAttribute(index)) {
continue;
}
const u32 location = GetGenericAttributeLocation(index);
Id type = t_float4;
DeclareOutputAttribute(index);
}
}
void DeclareOutputAttribute(Attribute::Index index) {
static constexpr std::string_view swizzle = "xyzw";
const u32 location = GetGenericAttributeLocation(index);
u8 element = 0;
while (element < 4) {
const std::size_t remainder = 4 - element;
std::size_t num_components = remainder;
const std::optional tfb = GetTransformFeedbackInfo(index, element);
if (tfb) {
num_components = tfb->components;
}
Id type = GetTypeVectorDefinitionLut(Type::Float).at(num_components - 1);
Id varying_default = v_varying_default;
if (IsOutputAttributeArray()) {
const u32 num = GetNumOutputVertices();
@ -760,15 +809,47 @@ private:
}
type = TypePointer(spv::StorageClass::Output, type);
std::string name = fmt::format("out_attr{}", location);
if (num_components < 4 || element > 0) {
name = fmt::format("{}_{}", name, swizzle.substr(element, num_components));
}
const Id id = OpVariable(type, spv::StorageClass::Output, varying_default);
Name(AddGlobalVariable(id), fmt::format("out_attr{}", location));
output_attributes.emplace(index, id);
Name(AddGlobalVariable(id), name);
GenericVaryingDescription description;
description.id = id;
description.first_element = element;
description.is_scalar = num_components == 1;
for (u32 i = 0; i < num_components; ++i) {
const u8 offset = static_cast<u8>(static_cast<u32>(index) * 4 + element + i);
output_attributes.emplace(offset, description);
}
interfaces.push_back(id);
Decorate(id, spv::Decoration::Location, location);
if (element > 0) {
Decorate(id, spv::Decoration::Component, static_cast<u32>(element));
}
if (tfb && device.IsExtTransformFeedbackSupported()) {
Decorate(id, spv::Decoration::XfbBuffer, static_cast<u32>(tfb->buffer));
Decorate(id, spv::Decoration::XfbStride, static_cast<u32>(tfb->stride));
Decorate(id, spv::Decoration::Offset, static_cast<u32>(tfb->offset));
}
element += static_cast<u8>(num_components);
}
}
std::optional<VaryingTFB> GetTransformFeedbackInfo(Attribute::Index index, u8 element = 0) {
const u8 location = static_cast<u8>(static_cast<u32>(index) * 4 + element);
const auto it = transform_feedback.find(location);
if (it == transform_feedback.end()) {
return {};
}
return it->second;
}
u32 DeclareConstantBuffers(u32 binding) {
for (const auto& [index, size] : ir.GetConstantBuffers()) {
const Id type = device.IsKhrUniformBufferStandardLayoutSupported() ? t_cbuf_scalar_ubo
@ -898,7 +979,7 @@ private:
u32 GetNumInputVertices() const {
switch (stage) {
case ShaderType::Geometry:
return GetNumPrimitiveTopologyVertices(specialization.primitive_topology);
return GetNumPrimitiveTopologyVertices(registry.GetGraphicsInfo().primitive_topology);
case ShaderType::TesselationControl:
case ShaderType::TesselationEval:
return NumInputPatches;
@ -1346,8 +1427,14 @@ private:
}
default:
if (IsGenericAttribute(attribute)) {
const Id composite = output_attributes.at(attribute);
return {ArrayPass(t_out_float, composite, {element}), Type::Float};
const u8 offset = static_cast<u8>(static_cast<u8>(attribute) * 4 + element);
const GenericVaryingDescription description = output_attributes.at(offset);
const Id composite = description.id;
std::vector<u32> indices;
if (!description.is_scalar) {
indices.push_back(element - description.first_element);
}
return {ArrayPass(t_out_float, composite, indices), Type::Float};
}
UNIMPLEMENTED_MSG("Unhandled output attribute: {}",
static_cast<u32>(attribute));
@ -1793,7 +1880,7 @@ private:
}
Expression ImageLoad(Operation operation) {
if (!device.IsShaderStorageImageReadWithoutFormatSupported()) {
if (!device.IsFormatlessImageLoadSupported()) {
return {v_float_zero, Type::Float};
}
@ -2258,11 +2345,11 @@ private:
std::array<Id, 4> GetTypeVectorDefinitionLut(Type type) const {
switch (type) {
case Type::Float:
return {nullptr, t_float2, t_float3, t_float4};
return {t_float, t_float2, t_float3, t_float4};
case Type::Int:
return {nullptr, t_int2, t_int3, t_int4};
return {t_int, t_int2, t_int3, t_int4};
case Type::Uint:
return {nullptr, t_uint2, t_uint3, t_uint4};
return {t_uint, t_uint2, t_uint3, t_uint4};
default:
UNIMPLEMENTED();
return {};
@ -2495,7 +2582,9 @@ private:
const ShaderIR& ir;
const ShaderType stage;
const Tegra::Shader::Header header;
const Registry& registry;
const Specialization& specialization;
std::unordered_map<u8, VaryingTFB> transform_feedback;
const Id t_void = Name(TypeVoid(), "void");
@ -2584,7 +2673,7 @@ private:
Id shared_memory{};
std::array<Id, INTERNAL_FLAGS_COUNT> internal_flags{};
std::map<Attribute::Index, Id> input_attributes;
std::map<Attribute::Index, Id> output_attributes;
std::unordered_map<u8, GenericVaryingDescription> output_attributes;
std::map<u32, Id> constant_buffers;
std::map<GlobalMemoryBase, Id> global_buffers;
std::map<u32, TexelBuffer> texel_buffers;
@ -2870,8 +2959,9 @@ ShaderEntries GenerateShaderEntries(const VideoCommon::Shader::ShaderIR& ir) {
}
std::vector<u32> Decompile(const VKDevice& device, const VideoCommon::Shader::ShaderIR& ir,
ShaderType stage, const Specialization& specialization) {
return SPIRVDecompiler(device, ir, stage, specialization).Assemble();
ShaderType stage, const VideoCommon::Shader::Registry& registry,
const Specialization& specialization) {
return SPIRVDecompiler(device, ir, stage, registry, specialization).Assemble();
}
} // namespace Vulkan

13
src/video_core/renderer_vulkan/vk_shader_decompiler.h
View file

@ -15,6 +15,7 @@
#include "common/common_types.h"
#include "video_core/engines/maxwell_3d.h"
#include "video_core/engines/shader_type.h"
#include "video_core/shader/registry.h"
#include "video_core/shader/shader_ir.h"
namespace Vulkan {
@ -91,17 +92,9 @@ struct Specialization final {
u32 shared_memory_size{};
// Graphics specific
Maxwell::PrimitiveTopology primitive_topology{};
std::optional<float> point_size{};
std::array<Maxwell::VertexAttribute::Type, Maxwell::NumVertexAttributes> attribute_types{};
bool ndc_minus_one_to_one{};
// Tessellation specific
struct {
Maxwell::TessellationPrimitive primitive{};
Maxwell::TessellationSpacing spacing{};
bool clockwise{};
} tessellation;
};
// Old gcc versions don't consider this trivially copyable.
// static_assert(std::is_trivially_copyable_v<Specialization>);
@ -114,6 +107,8 @@ struct SPIRVShader {
ShaderEntries GenerateShaderEntries(const VideoCommon::Shader::ShaderIR& ir);
std::vector<u32> Decompile(const VKDevice& device, const VideoCommon::Shader::ShaderIR& ir,
Tegra::Engines::ShaderType stage, const Specialization& specialization);
Tegra::Engines::ShaderType stage,
const VideoCommon::Shader::Registry& registry,
const Specialization& specialization);
} // namespace Vulkan

115
src/video_core/shader/transform_feedback.cpp Normal file
View file

@ -0,0 +1,115 @@
// Copyright 2020 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <array>
#include <unordered_map>
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/maxwell_3d.h"
#include "video_core/shader/registry.h"
#include "video_core/shader/transform_feedback.h"
namespace VideoCommon::Shader {
namespace {
using Maxwell = Tegra::Engines::Maxwell3D::Regs;
// TODO(Rodrigo): Change this to constexpr std::unordered_set in C++20
/// Attribute offsets that describe a vector
constexpr std::array VECTORS = {
28, // gl_Position
32, // Generic 0
36, // Generic 1
40, // Generic 2
44, // Generic 3
48, // Generic 4
52, // Generic 5
56, // Generic 6
60, // Generic 7
64, // Generic 8
68, // Generic 9
72, // Generic 10
76, // Generic 11
80, // Generic 12
84, // Generic 13
88, // Generic 14
92, // Generic 15
96, // Generic 16
100, // Generic 17
104, // Generic 18
108, // Generic 19
112, // Generic 20
116, // Generic 21
120, // Generic 22
124, // Generic 23
128, // Generic 24
132, // Generic 25
136, // Generic 26
140, // Generic 27
144, // Generic 28
148, // Generic 29
152, // Generic 30
156, // Generic 31
160, // gl_FrontColor
164, // gl_FrontSecondaryColor
160, // gl_BackColor
164, // gl_BackSecondaryColor
192, // gl_TexCoord[0]
196, // gl_TexCoord[1]
200, // gl_TexCoord[2]
204, // gl_TexCoord[3]
208, // gl_TexCoord[4]
212, // gl_TexCoord[5]
216, // gl_TexCoord[6]
220, // gl_TexCoord[7]
};
} // namespace
std::unordered_map<u8, VaryingTFB> BuildTransformFeedback(const GraphicsInfo& info) {
std::unordered_map<u8, VaryingTFB> tfb;
for (std::size_t buffer = 0; buffer < Maxwell::NumTransformFeedbackBuffers; ++buffer) {
const auto& locations = info.tfb_varying_locs[buffer];
const auto& layout = info.tfb_layouts[buffer];
const std::size_t varying_count = layout.varying_count;
std::size_t highest = 0;
for (std::size_t offset = 0; offset < varying_count; ++offset) {
const std::size_t base_offset = offset;
const u8 location = locations[offset];
VaryingTFB varying;
varying.buffer = layout.stream;
varying.stride = layout.stride;
varying.offset = offset * sizeof(u32);
varying.components = 1;
if (std::find(VECTORS.begin(), VECTORS.end(), location / 4 * 4) != VECTORS.end()) {
UNIMPLEMENTED_IF_MSG(location % 4 != 0, "Unaligned TFB");
const u8 base_index = location / 4;
while (offset + 1 < varying_count && base_index == locations[offset + 1] / 4) {
++offset;
++varying.components;
}
}
[[maybe_unused]] const bool inserted = tfb.emplace(location, varying).second;
UNIMPLEMENTED_IF_MSG(!inserted, "Varying already stored");
highest = std::max(highest, (base_offset + varying.components) * sizeof(u32));
}
UNIMPLEMENTED_IF(highest != layout.stride);
}
return tfb;
}
} // namespace VideoCommon::Shader

23
src/video_core/shader/transform_feedback.h Normal file
View file

@ -0,0 +1,23 @@
// Copyright 2020 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <unordered_map>
#include "common/common_types.h"
#include "video_core/shader/registry.h"
namespace VideoCommon::Shader {
struct VaryingTFB {
std::size_t buffer;
std::size_t stride;
std::size_t offset;
std::size_t components;
};
std::unordered_map<u8, VaryingTFB> BuildTransformFeedback(const GraphicsInfo& info);
} // namespace VideoCommon::Shader