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godot/servers/rendering/rendering_device_driver.cpp
Pedro J. Estébanez 49625beac2 Ensure specialization constants come sorted from reflection
2024-03-12 14:42:01 +01:00

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/**************************************************************************/
/* rendering_device_driver.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#include "rendering_device_driver.h"
#include "thirdparty/spirv-reflect/spirv_reflect.h"
/****************/
/**** SHADER ****/
/****************/
Error RenderingDeviceDriver::_reflect_spirv(VectorView<ShaderStageSPIRVData> p_spirv, ShaderReflection &r_reflection) {
r_reflection = {};
for (uint32_t i = 0; i < p_spirv.size(); i++) {
ShaderStage stage = p_spirv[i].shader_stage;
ShaderStage stage_flag = (ShaderStage)(1 << p_spirv[i].shader_stage);
if (p_spirv[i].shader_stage == SHADER_STAGE_COMPUTE) {
r_reflection.is_compute = true;
ERR_FAIL_COND_V_MSG(p_spirv.size() != 1, FAILED,
"Compute shaders can only receive one stage, dedicated to compute.");
}
ERR_FAIL_COND_V_MSG(r_reflection.stages.has_flag(stage_flag), FAILED,
"Stage " + String(SHADER_STAGE_NAMES[p_spirv[i].shader_stage]) + " submitted more than once.");
{
SpvReflectShaderModule module;
const uint8_t *spirv = p_spirv[i].spirv.ptr();
SpvReflectResult result = spvReflectCreateShaderModule(p_spirv[i].spirv.size(), spirv, &module);
ERR_FAIL_COND_V_MSG(result != SPV_REFLECT_RESULT_SUCCESS, FAILED,
"Reflection of SPIR-V shader stage '" + String(SHADER_STAGE_NAMES[p_spirv[i].shader_stage]) + "' failed parsing shader.");
if (r_reflection.is_compute) {
r_reflection.compute_local_size[0] = module.entry_points->local_size.x;
r_reflection.compute_local_size[1] = module.entry_points->local_size.y;
r_reflection.compute_local_size[2] = module.entry_points->local_size.z;
}
uint32_t binding_count = 0;
result = spvReflectEnumerateDescriptorBindings(&module, &binding_count, nullptr);
ERR_FAIL_COND_V_MSG(result != SPV_REFLECT_RESULT_SUCCESS, FAILED,
"Reflection of SPIR-V shader stage '" + String(SHADER_STAGE_NAMES[p_spirv[i].shader_stage]) + "' failed enumerating descriptor bindings.");
if (binding_count > 0) {
// Parse bindings.
Vector<SpvReflectDescriptorBinding *> bindings;
bindings.resize(binding_count);
result = spvReflectEnumerateDescriptorBindings(&module, &binding_count, bindings.ptrw());
ERR_FAIL_COND_V_MSG(result != SPV_REFLECT_RESULT_SUCCESS, FAILED,
"Reflection of SPIR-V shader stage '" + String(SHADER_STAGE_NAMES[p_spirv[i].shader_stage]) + "' failed getting descriptor bindings.");
for (uint32_t j = 0; j < binding_count; j++) {
const SpvReflectDescriptorBinding &binding = *bindings[j];
ShaderUniform uniform;
bool need_array_dimensions = false;
bool need_block_size = false;
bool may_be_writable = false;
switch (binding.descriptor_type) {
case SPV_REFLECT_DESCRIPTOR_TYPE_SAMPLER: {
uniform.type = UNIFORM_TYPE_SAMPLER;
need_array_dimensions = true;
} break;
case SPV_REFLECT_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER: {
uniform.type = UNIFORM_TYPE_SAMPLER_WITH_TEXTURE;
need_array_dimensions = true;
} break;
case SPV_REFLECT_DESCRIPTOR_TYPE_SAMPLED_IMAGE: {
uniform.type = UNIFORM_TYPE_TEXTURE;
need_array_dimensions = true;
} break;
case SPV_REFLECT_DESCRIPTOR_TYPE_STORAGE_IMAGE: {
uniform.type = UNIFORM_TYPE_IMAGE;
need_array_dimensions = true;
may_be_writable = true;
} break;
case SPV_REFLECT_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER: {
uniform.type = UNIFORM_TYPE_TEXTURE_BUFFER;
need_array_dimensions = true;
} break;
case SPV_REFLECT_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER: {
uniform.type = UNIFORM_TYPE_IMAGE_BUFFER;
need_array_dimensions = true;
may_be_writable = true;
} break;
case SPV_REFLECT_DESCRIPTOR_TYPE_UNIFORM_BUFFER: {
uniform.type = UNIFORM_TYPE_UNIFORM_BUFFER;
need_block_size = true;
} break;
case SPV_REFLECT_DESCRIPTOR_TYPE_STORAGE_BUFFER: {
uniform.type = UNIFORM_TYPE_STORAGE_BUFFER;
need_block_size = true;
may_be_writable = true;
} break;
case SPV_REFLECT_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC: {
ERR_PRINT("Dynamic uniform buffer not supported.");
continue;
} break;
case SPV_REFLECT_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC: {
ERR_PRINT("Dynamic storage buffer not supported.");
continue;
} break;
case SPV_REFLECT_DESCRIPTOR_TYPE_INPUT_ATTACHMENT: {
uniform.type = UNIFORM_TYPE_INPUT_ATTACHMENT;
need_array_dimensions = true;
} break;
case SPV_REFLECT_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_KHR: {
ERR_PRINT("Acceleration structure not supported.");
continue;
} break;
}
if (need_array_dimensions) {
if (binding.array.dims_count == 0) {
uniform.length = 1;
} else {
for (uint32_t k = 0; k < binding.array.dims_count; k++) {
if (k == 0) {
uniform.length = binding.array.dims[0];
} else {
uniform.length *= binding.array.dims[k];
}
}
}
} else if (need_block_size) {
uniform.length = binding.block.size;
} else {
uniform.length = 0;
}
if (may_be_writable) {
uniform.writable = !(binding.type_description->decoration_flags & SPV_REFLECT_DECORATION_NON_WRITABLE) && !(binding.block.decoration_flags & SPV_REFLECT_DECORATION_NON_WRITABLE);
} else {
uniform.writable = false;
}
uniform.binding = binding.binding;
uint32_t set = binding.set;
ERR_FAIL_COND_V_MSG(set >= MAX_UNIFORM_SETS, FAILED,
"On shader stage '" + String(SHADER_STAGE_NAMES[stage]) + "', uniform '" + binding.name + "' uses a set (" + itos(set) + ") index larger than what is supported (" + itos(MAX_UNIFORM_SETS) + ").");
if (set < (uint32_t)r_reflection.uniform_sets.size()) {
// Check if this already exists.
bool exists = false;
for (int k = 0; k < r_reflection.uniform_sets[set].size(); k++) {
if (r_reflection.uniform_sets[set][k].binding == uniform.binding) {
// Already exists, verify that it's the same type.
ERR_FAIL_COND_V_MSG(r_reflection.uniform_sets[set][k].type != uniform.type, FAILED,
"On shader stage '" + String(SHADER_STAGE_NAMES[stage]) + "', uniform '" + binding.name + "' trying to reuse location for set=" + itos(set) + ", binding=" + itos(uniform.binding) + " with different uniform type.");
// Also, verify that it's the same size.
ERR_FAIL_COND_V_MSG(r_reflection.uniform_sets[set][k].length != uniform.length, FAILED,
"On shader stage '" + String(SHADER_STAGE_NAMES[stage]) + "', uniform '" + binding.name + "' trying to reuse location for set=" + itos(set) + ", binding=" + itos(uniform.binding) + " with different uniform size.");
// Also, verify that it has the same writability.
ERR_FAIL_COND_V_MSG(r_reflection.uniform_sets[set][k].writable != uniform.writable, FAILED,
"On shader stage '" + String(SHADER_STAGE_NAMES[stage]) + "', uniform '" + binding.name + "' trying to reuse location for set=" + itos(set) + ", binding=" + itos(uniform.binding) + " with different writability.");
// Just append stage mask and return.
r_reflection.uniform_sets.write[set].write[k].stages.set_flag(stage_flag);
exists = true;
break;
}
}
if (exists) {
continue; // Merged.
}
}
uniform.stages.set_flag(stage_flag);
if (set >= (uint32_t)r_reflection.uniform_sets.size()) {
r_reflection.uniform_sets.resize(set + 1);
}
r_reflection.uniform_sets.write[set].push_back(uniform);
}
}
{
// Specialization constants.
uint32_t sc_count = 0;
result = spvReflectEnumerateSpecializationConstants(&module, &sc_count, nullptr);
ERR_FAIL_COND_V_MSG(result != SPV_REFLECT_RESULT_SUCCESS, FAILED,
"Reflection of SPIR-V shader stage '" + String(SHADER_STAGE_NAMES[p_spirv[i].shader_stage]) + "' failed enumerating specialization constants.");
if (sc_count) {
Vector<SpvReflectSpecializationConstant *> spec_constants;
spec_constants.resize(sc_count);
result = spvReflectEnumerateSpecializationConstants(&module, &sc_count, spec_constants.ptrw());
ERR_FAIL_COND_V_MSG(result != SPV_REFLECT_RESULT_SUCCESS, FAILED,
"Reflection of SPIR-V shader stage '" + String(SHADER_STAGE_NAMES[p_spirv[i].shader_stage]) + "' failed obtaining specialization constants.");
for (uint32_t j = 0; j < sc_count; j++) {
int32_t existing = -1;
ShaderSpecializationConstant sconst;
SpvReflectSpecializationConstant *spc = spec_constants[j];
sconst.constant_id = spc->constant_id;
sconst.int_value = 0; // Clear previous value JIC.
switch (spc->constant_type) {
case SPV_REFLECT_SPECIALIZATION_CONSTANT_BOOL: {
sconst.type = PIPELINE_SPECIALIZATION_CONSTANT_TYPE_BOOL;
sconst.bool_value = spc->default_value.int_bool_value != 0;
} break;
case SPV_REFLECT_SPECIALIZATION_CONSTANT_INT: {
sconst.type = PIPELINE_SPECIALIZATION_CONSTANT_TYPE_INT;
sconst.int_value = spc->default_value.int_bool_value;
} break;
case SPV_REFLECT_SPECIALIZATION_CONSTANT_FLOAT: {
sconst.type = PIPELINE_SPECIALIZATION_CONSTANT_TYPE_FLOAT;
sconst.float_value = spc->default_value.float_value;
} break;
}
sconst.stages.set_flag(stage_flag);
for (int k = 0; k < r_reflection.specialization_constants.size(); k++) {
if (r_reflection.specialization_constants[k].constant_id == sconst.constant_id) {
ERR_FAIL_COND_V_MSG(r_reflection.specialization_constants[k].type != sconst.type, FAILED, "More than one specialization constant used for id (" + itos(sconst.constant_id) + "), but their types differ.");
ERR_FAIL_COND_V_MSG(r_reflection.specialization_constants[k].int_value != sconst.int_value, FAILED, "More than one specialization constant used for id (" + itos(sconst.constant_id) + "), but their default values differ.");
existing = k;
break;
}
}
if (existing > 0) {
r_reflection.specialization_constants.write[existing].stages.set_flag(stage_flag);
} else {
r_reflection.specialization_constants.push_back(sconst);
}
}
r_reflection.specialization_constants.sort();
}
}
if (stage == SHADER_STAGE_VERTEX) {
uint32_t iv_count = 0;
result = spvReflectEnumerateInputVariables(&module, &iv_count, nullptr);
ERR_FAIL_COND_V_MSG(result != SPV_REFLECT_RESULT_SUCCESS, FAILED,
"Reflection of SPIR-V shader stage '" + String(SHADER_STAGE_NAMES[p_spirv[i].shader_stage]) + "' failed enumerating input variables.");
if (iv_count) {
Vector<SpvReflectInterfaceVariable *> input_vars;
input_vars.resize(iv_count);
result = spvReflectEnumerateInputVariables(&module, &iv_count, input_vars.ptrw());
ERR_FAIL_COND_V_MSG(result != SPV_REFLECT_RESULT_SUCCESS, FAILED,
"Reflection of SPIR-V shader stage '" + String(SHADER_STAGE_NAMES[p_spirv[i].shader_stage]) + "' failed obtaining input variables.");
for (uint32_t j = 0; j < iv_count; j++) {
if (input_vars[j] && input_vars[j]->decoration_flags == 0) { // Regular input.
r_reflection.vertex_input_mask |= (((uint64_t)1) << input_vars[j]->location);
}
}
}
}
if (stage == SHADER_STAGE_FRAGMENT) {
uint32_t ov_count = 0;
result = spvReflectEnumerateOutputVariables(&module, &ov_count, nullptr);
ERR_FAIL_COND_V_MSG(result != SPV_REFLECT_RESULT_SUCCESS, FAILED,
"Reflection of SPIR-V shader stage '" + String(SHADER_STAGE_NAMES[p_spirv[i].shader_stage]) + "' failed enumerating output variables.");
if (ov_count) {
Vector<SpvReflectInterfaceVariable *> output_vars;
output_vars.resize(ov_count);
result = spvReflectEnumerateOutputVariables(&module, &ov_count, output_vars.ptrw());
ERR_FAIL_COND_V_MSG(result != SPV_REFLECT_RESULT_SUCCESS, FAILED,
"Reflection of SPIR-V shader stage '" + String(SHADER_STAGE_NAMES[p_spirv[i].shader_stage]) + "' failed obtaining output variables.");
for (uint32_t j = 0; j < ov_count; j++) {
const SpvReflectInterfaceVariable *refvar = output_vars[j];
if (refvar != nullptr && refvar->built_in != SpvBuiltInFragDepth) {
r_reflection.fragment_output_mask |= 1 << refvar->location;
}
}
}
}
uint32_t pc_count = 0;
result = spvReflectEnumeratePushConstantBlocks(&module, &pc_count, nullptr);
ERR_FAIL_COND_V_MSG(result != SPV_REFLECT_RESULT_SUCCESS, FAILED,
"Reflection of SPIR-V shader stage '" + String(SHADER_STAGE_NAMES[p_spirv[i].shader_stage]) + "' failed enumerating push constants.");
if (pc_count) {
ERR_FAIL_COND_V_MSG(pc_count > 1, FAILED,
"Reflection of SPIR-V shader stage '" + String(SHADER_STAGE_NAMES[p_spirv[i].shader_stage]) + "': Only one push constant is supported, which should be the same across shader stages.");
Vector<SpvReflectBlockVariable *> pconstants;
pconstants.resize(pc_count);
result = spvReflectEnumeratePushConstantBlocks(&module, &pc_count, pconstants.ptrw());
ERR_FAIL_COND_V_MSG(result != SPV_REFLECT_RESULT_SUCCESS, FAILED,
"Reflection of SPIR-V shader stage '" + String(SHADER_STAGE_NAMES[p_spirv[i].shader_stage]) + "' failed obtaining push constants.");
#if 0
if (pconstants[0] == nullptr) {
Ref<FileAccess> f = FileAccess::open("res://popo.spv", FileAccess::WRITE);
f->store_buffer((const uint8_t *)&SpirV[0], SpirV.size() * sizeof(uint32_t));
}
#endif
ERR_FAIL_COND_V_MSG(r_reflection.push_constant_size && r_reflection.push_constant_size != pconstants[0]->size, FAILED,
"Reflection of SPIR-V shader stage '" + String(SHADER_STAGE_NAMES[p_spirv[i].shader_stage]) + "': Push constant block must be the same across shader stages.");
r_reflection.push_constant_size = pconstants[0]->size;
r_reflection.push_constant_stages.set_flag(stage_flag);
//print_line("Stage: " + String(SHADER_STAGE_NAMES[stage]) + " push constant of size=" + itos(push_constant.push_constant_size));
}
// Destroy the reflection data when no longer required.
spvReflectDestroyShaderModule(&module);
}
r_reflection.stages.set_flag(stage_flag);
}
return OK;
}
/**************/
/**** MISC ****/
/**************/
uint64_t RenderingDeviceDriver::api_trait_get(ApiTrait p_trait) {
// Sensible canonical defaults.
switch (p_trait) {
case API_TRAIT_HONORS_PIPELINE_BARRIERS:
return 1;
case API_TRAIT_SHADER_CHANGE_INVALIDATION:
return SHADER_CHANGE_INVALIDATION_ALL_BOUND_UNIFORM_SETS;
case API_TRAIT_TEXTURE_TRANSFER_ALIGNMENT:
return 1;
case API_TRAIT_TEXTURE_DATA_ROW_PITCH_STEP:
return 1;
case API_TRAIT_SECONDARY_VIEWPORT_SCISSOR:
return 1;
default:
ERR_FAIL_V(0);
}
}
/******************/
RenderingDeviceDriver::~RenderingDeviceDriver() {}
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