godot/drivers/vulkan/rendering_shader_container_vulkan.cpp

/**************************************************************************/
/*  rendering_shader_container_vulkan.cpp                                 */
/**************************************************************************/
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#include "rendering_shader_container_vulkan.h"

#include "thirdparty/misc/smolv.h"

// RenderingShaderContainerVulkan

const uint32_t RenderingShaderContainerVulkan::FORMAT_VERSION = 1;

uint32_t RenderingShaderContainerVulkan::_format() const {
	return 0x43565053;
}

uint32_t RenderingShaderContainerVulkan::_format_version() const {
	return FORMAT_VERSION;
}

bool RenderingShaderContainerVulkan::_set_code_from_spirv(const ReflectShader &p_shader) {
	const LocalVector<ReflectShaderStage> &p_spirv = p_shader.shader_stages;

	PackedByteArray code_bytes;
	shaders.resize(p_spirv.size());
	for (uint64_t i = 0; i < p_spirv.size(); i++) {
		RenderingShaderContainer::Shader &shader = shaders.ptrw()[i];
		if (debug_info_enabled) {
			// Store SPIR-V as is when debug info is required.
			shader.code_compressed_bytes = p_spirv[i].spirv_data();
			shader.code_compression_flags = 0;
			shader.code_decompressed_size = 0;
		} else {
			// Encode into smolv.
			Span<uint8_t> spirv = p_spirv[i].spirv().reinterpret<uint8_t>();
			smolv::ByteArray smolv_bytes;
			bool smolv_encoded = smolv::Encode(spirv.ptr(), spirv.size(), smolv_bytes, smolv::kEncodeFlagStripDebugInfo);
			ERR_FAIL_COND_V_MSG(!smolv_encoded, false, "Failed to compress SPIR-V into smolv.");

			code_bytes.resize(smolv_bytes.size());
			memcpy(code_bytes.ptrw(), smolv_bytes.data(), code_bytes.size());

			// Compress.
			uint32_t compressed_size = 0;
			shader.code_decompressed_size = code_bytes.size();
			shader.code_compressed_bytes.resize(code_bytes.size());

			bool compressed = compress_code(code_bytes.ptr(), code_bytes.size(), shader.code_compressed_bytes.ptrw(), &compressed_size, &shader.code_compression_flags);
			ERR_FAIL_COND_V_MSG(!compressed, false, vformat("Failed to compress native code to native for SPIR-V #%d.", i));

			shader.code_compressed_bytes.resize(compressed_size);

			// Indicate it uses smolv for compression.
			shader.code_compression_flags |= COMPRESSION_FLAG_SMOLV;
		}

		shader.shader_stage = p_spirv[i].shader_stage;
	}

	return true;
}

RenderingShaderContainerVulkan::RenderingShaderContainerVulkan(bool p_debug_info_enabled) {
	debug_info_enabled = p_debug_info_enabled;
}

// RenderingShaderContainerFormatVulkan

Ref<RenderingShaderContainer> RenderingShaderContainerFormatVulkan::create_container() const {
	return memnew(RenderingShaderContainerVulkan(debug_info_enabled));
}

RenderingDeviceCommons::ShaderLanguageVersion RenderingShaderContainerFormatVulkan::get_shader_language_version() const {
	return SHADER_LANGUAGE_VULKAN_VERSION_1_1;
}

RenderingDeviceCommons::ShaderSpirvVersion RenderingShaderContainerFormatVulkan::get_shader_spirv_version() const {
	return SHADER_SPIRV_VERSION_1_4;
}

void RenderingShaderContainerFormatVulkan::set_debug_info_enabled(bool p_debug_info_enabled) {
	debug_info_enabled = p_debug_info_enabled;
}

bool RenderingShaderContainerFormatVulkan::get_debug_info_enabled() const {
	return debug_info_enabled;
}

RenderingShaderContainerFormatVulkan::RenderingShaderContainerFormatVulkan() {}

RenderingShaderContainerFormatVulkan::~RenderingShaderContainerFormatVulkan() {}