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Implement scaled vertex buffer format emulation 

These formats are unsupported by mobile GPUs so they need to be emulated in shaders instead.
This commit is contained in:
Billy Laws 2023-02-18 18:23:36 +00:00 committed by bunnei
parent 206f1304d6
commit 158a1896ec
9 changed files with 97 additions and 51 deletions
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44
src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
View File

@ -10,27 +10,6 @@
namespace Shader::Backend::SPIRV {
namespace {
struct AttrInfo {
Id pointer;
Id id;
bool needs_cast;
};
std::optional<AttrInfo> AttrTypes(EmitContext& ctx, u32 index) {
const AttributeType type{ctx.runtime_info.generic_input_types.at(index)};
switch (type) {
case AttributeType::Float:
return AttrInfo{ctx.input_f32, ctx.F32[1], false};
case AttributeType::UnsignedInt:
return AttrInfo{ctx.input_u32, ctx.U32[1], true};
case AttributeType::SignedInt:
return AttrInfo{ctx.input_s32, ctx.TypeInt(32, true), true};
case AttributeType::Disabled:
return std::nullopt;
}
throw InvalidArgument("Invalid attribute type {}", type);
}
template <typename... Args>
Id AttrPointer(EmitContext& ctx, Id pointer_type, Id vertex, Id base, Args&&... args) {
switch (ctx.stage) {
@ -302,15 +281,26 @@ Id EmitGetAttribute(EmitContext& ctx, IR::Attribute attr, Id vertex) {
const u32 element{static_cast<u32>(attr) % 4};
if (IR::IsGeneric(attr)) {
const u32 index{IR::GenericAttributeIndex(attr)};
const std::optional<AttrInfo> type{AttrTypes(ctx, index)};
if (!type || !ctx.runtime_info.previous_stage_stores.Generic(index, element)) {
const auto& generic{ctx.input_generics.at(index)};
if (!ValidId(generic.id)) {
// Attribute is disabled or varying component is not written
return ctx.Const(element == 3 ? 1.0f : 0.0f);
}
const Id generic_id{ctx.input_generics.at(index)};
const Id pointer{AttrPointer(ctx, type->pointer, vertex, generic_id, ctx.Const(element))};
const Id value{ctx.OpLoad(type->id, pointer)};
return type->needs_cast ? ctx.OpBitcast(ctx.F32[1], value) : value;
const Id pointer{
AttrPointer(ctx, generic.pointer_type, vertex, generic.id, ctx.Const(element))};
const Id value{ctx.OpLoad(generic.component_type, pointer)};
return [&ctx, generic, value]() {
switch (generic.load_op) {
case InputGenericLoadOp::Bitcast:
return ctx.OpBitcast(ctx.F32[1], value);
case InputGenericLoadOp::SToF:
return ctx.OpConvertSToF(ctx.F32[1], value);
case InputGenericLoadOp::UToF:
return ctx.OpConvertUToF(ctx.F32[1], value);
default:
return value;
};
}();
}
switch (attr) {
case IR::Attribute::PrimitiveId:

61
src/shader_recompiler/backend/spirv/spirv_emit_context.cpp
View File

@ -25,12 +25,6 @@ enum class Operation {
FPMax,
};
struct AttrInfo {
Id pointer;
Id id;
bool needs_cast;
};
Id ImageType(EmitContext& ctx, const TextureDescriptor& desc) {
const spv::ImageFormat format{spv::ImageFormat::Unknown};
const Id type{ctx.F32[1]};
@ -206,23 +200,37 @@ Id GetAttributeType(EmitContext& ctx, AttributeType type) {
return ctx.TypeVector(ctx.TypeInt(32, true), 4);
case AttributeType::UnsignedInt:
return ctx.U32[4];
case AttributeType::SignedScaled:
return ctx.profile.support_scaled_attributes ? ctx.F32[4]
: ctx.TypeVector(ctx.TypeInt(32, true), 4);
case AttributeType::UnsignedScaled:
return ctx.profile.support_scaled_attributes ? ctx.F32[4] : ctx.U32[4];
case AttributeType::Disabled:
break;
}
throw InvalidArgument("Invalid attribute type {}", type);
}
std::optional<AttrInfo> AttrTypes(EmitContext& ctx, u32 index) {
const AttributeType type{ctx.runtime_info.generic_input_types.at(index)};
InputGenericInfo GetAttributeInfo(EmitContext& ctx, AttributeType type, Id id) {
switch (type) {
case AttributeType::Float:
return AttrInfo{ctx.input_f32, ctx.F32[1], false};
return InputGenericInfo{id, ctx.input_f32, ctx.F32[1], InputGenericLoadOp::None};
case AttributeType::UnsignedInt:
return AttrInfo{ctx.input_u32, ctx.U32[1], true};
return InputGenericInfo{id, ctx.input_u32, ctx.U32[1], InputGenericLoadOp::Bitcast};
case AttributeType::SignedInt:
return AttrInfo{ctx.input_s32, ctx.TypeInt(32, true), true};
return InputGenericInfo{id, ctx.input_s32, ctx.TypeInt(32, true),
InputGenericLoadOp::Bitcast};
case AttributeType::SignedScaled:
return ctx.profile.support_scaled_attributes
? InputGenericInfo{id, ctx.input_f32, ctx.F32[1], InputGenericLoadOp::None}
: InputGenericInfo{id, ctx.input_s32, ctx.TypeInt(32, true),
InputGenericLoadOp::SToF};
case AttributeType::UnsignedScaled:
return ctx.profile.support_scaled_attributes
? InputGenericInfo{id, ctx.input_f32, ctx.F32[1], InputGenericLoadOp::None}
: InputGenericInfo{id, ctx.input_u32, ctx.U32[1], InputGenericLoadOp::UToF};
case AttributeType::Disabled:
return std::nullopt;
return InputGenericInfo{};
}
throw InvalidArgument("Invalid attribute type {}", type);
}
@ -746,18 +754,29 @@ void EmitContext::DefineAttributeMemAccess(const Info& info) {
continue;
}
AddLabel(labels[label_index]);
const auto type{AttrTypes(*this, static_cast<u32>(index))};
if (!type) {
const auto& generic{input_generics.at(index)};
const Id generic_id{generic.id};
if (!ValidId(generic_id)) {
OpReturnValue(Const(0.0f));
++label_index;
continue;
}
const Id generic_id{input_generics.at(index)};
const Id pointer{is_array
? OpAccessChain(type->pointer, generic_id, vertex, masked_index)
: OpAccessChain(type->pointer, generic_id, masked_index)};
const Id value{OpLoad(type->id, pointer)};
const Id result{type->needs_cast ? OpBitcast(F32[1], value) : value};
const Id pointer{
is_array ? OpAccessChain(generic.pointer_type, generic_id, vertex, masked_index)
: OpAccessChain(generic.pointer_type, generic_id, masked_index)};
const Id value{OpLoad(generic.component_type, pointer)};
const Id result{[this, generic, value]() {
switch (generic.load_op) {
case InputGenericLoadOp::Bitcast:
return OpBitcast(F32[1], value);
case InputGenericLoadOp::SToF:
return OpConvertSToF(F32[1], value);
case InputGenericLoadOp::UToF:
return OpConvertUToF(F32[1], value);
default:
return value;
};
}()};
OpReturnValue(result);
++label_index;
}
@ -1457,7 +1476,7 @@ void EmitContext::DefineInputs(const IR::Program& program) {
const Id id{DefineInput(*this, type, true)};
Decorate(id, spv::Decoration::Location, static_cast<u32>(index));
Name(id, fmt::format("in_attr{}", index));
input_generics[index] = id;
input_generics[index] = GetAttributeInfo(*this, input_type, id);
if (info.passthrough.Generic(index) && profile.support_geometry_shader_passthrough) {
Decorate(id, spv::Decoration::PassthroughNV);

16
src/shader_recompiler/backend/spirv/spirv_emit_context.h
View File

@ -95,6 +95,20 @@ struct StorageDefinitions {
Id U32x4{};
};
enum class InputGenericLoadOp {
None,
Bitcast,
SToF,
UToF,
};
struct InputGenericInfo {
Id id;
Id pointer_type;
Id component_type;
InputGenericLoadOp load_op;
};
struct GenericElementInfo {
Id id{};
u32 first_element{};
@ -283,7 +297,7 @@ public:
bool need_input_position_indirect{};
Id input_position{};
std::array<Id, 32> input_generics{};
std::array<InputGenericInfo, 32> input_generics{};
Id output_point_size{};
Id output_position{};

1
src/shader_recompiler/profile.h
View File

@ -43,6 +43,7 @@ struct Profile {
bool support_gl_variable_aoffi{};
bool support_gl_sparse_textures{};
bool support_gl_derivative_control{};
bool support_scaled_attributes{};
bool warp_size_potentially_larger_than_guest{};

2
src/shader_recompiler/runtime_info.h
View File

@ -17,6 +17,8 @@ enum class AttributeType : u8 {
Float,
SignedInt,
UnsignedInt,
SignedScaled,
UnsignedScaled,
Disabled,
};

8
src/video_core/renderer_vulkan/maxwell_to_vk.cpp
View File

@ -347,6 +347,14 @@ VkPrimitiveTopology PrimitiveTopology([[maybe_unused]] const Device& device,
VkFormat VertexFormat(const Device& device, Maxwell::VertexAttribute::Type type,
Maxwell::VertexAttribute::Size size) {
if (device.MustEmulateScaledFormats()) {
if (type == Maxwell::VertexAttribute::Type::SScaled) {
type = Maxwell::VertexAttribute::Type::SInt;
} else if (type == Maxwell::VertexAttribute::Type::UScaled) {
type = Maxwell::VertexAttribute::Type::UInt;
}
}
const VkFormat format{([&]() {
switch (type) {
case Maxwell::VertexAttribute::Type::UnusedEnumDoNotUseBecauseItWillGoAway:

7
src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
View File

@ -114,14 +114,16 @@ Shader::AttributeType CastAttributeType(const FixedPipelineState::VertexAttribut
return Shader::AttributeType::Disabled;
case Maxwell::VertexAttribute::Type::SNorm:
case Maxwell::VertexAttribute::Type::UNorm:
case Maxwell::VertexAttribute::Type::UScaled:
case Maxwell::VertexAttribute::Type::SScaled:
case Maxwell::VertexAttribute::Type::Float:
return Shader::AttributeType::Float;
case Maxwell::VertexAttribute::Type::SInt:
return Shader::AttributeType::SignedInt;
case Maxwell::VertexAttribute::Type::UInt:
return Shader::AttributeType::UnsignedInt;
case Maxwell::VertexAttribute::Type::UScaled:
return Shader::AttributeType::UnsignedScaled;
case Maxwell::VertexAttribute::Type::SScaled:
return Shader::AttributeType::SignedScaled;
}
return Shader::AttributeType::Float;
}
@ -331,6 +333,7 @@ PipelineCache::PipelineCache(RasterizerVulkan& rasterizer_, const Device& device
.support_derivative_control = true,
.support_geometry_shader_passthrough = device.IsNvGeometryShaderPassthroughSupported(),
.support_native_ndc = device.IsExtDepthClipControlSupported(),
.support_scaled_attributes = !device.MustEmulateScaledFormats(),
.warp_size_potentially_larger_than_guest = device.IsWarpSizePotentiallyBiggerThanGuest(),

4
src/video_core/vulkan_common/vulkan_device.cpp
View File

@ -363,6 +363,8 @@ Device::Device(VkInstance instance_, vk::PhysicalDevice physical_, VkSurfaceKHR
#ifdef ANDROID
if (is_adreno) {
must_emulate_scaled_formats = true;
LOG_WARNING(Render_Vulkan, "Adreno drivers have broken VK_EXT_extended_dynamic_state");
extensions.extended_dynamic_state = false;
loaded_extensions.erase(VK_EXT_EXTENDED_DYNAMIC_STATE_EXTENSION_NAME);
@ -391,6 +393,8 @@ Device::Device(VkInstance instance_, vk::PhysicalDevice physical_, VkSurfaceKHR
}
if (is_arm) {
must_emulate_scaled_formats = true;
LOG_WARNING(Render_Vulkan, "ARM drivers have broken VK_EXT_extended_dynamic_state");
extensions.extended_dynamic_state = false;
loaded_extensions.erase(VK_EXT_EXTENDED_DYNAMIC_STATE_EXTENSION_NAME);

5
src/video_core/vulkan_common/vulkan_device.h
View File

@ -551,6 +551,10 @@ public:
return cant_blit_msaa;
}
bool MustEmulateScaledFormats() const {
return must_emulate_scaled_formats;
}
bool MustEmulateBGR565() const {
return must_emulate_bgr565;
}
@ -666,6 +670,7 @@ private:
bool has_nsight_graphics{}; ///< Has Nsight Graphics attached
bool supports_d24_depth{}; ///< Supports D24 depth buffers.
bool cant_blit_msaa{}; ///< Does not support MSAA<->MSAA blitting.
bool must_emulate_scaled_formats{}; ///< Requires scaled vertex format emulation
bool must_emulate_bgr565{}; ///< Emulates BGR565 by swizzling RGB565 format.
bool dynamic_state3_blending{}; ///< Has all blending features of dynamic_state3.
bool dynamic_state3_enables{}; ///< Has all enables features of dynamic_state3.