blob: d129f543de20abc265d098df35db7f590bf6288b [file] [log] [blame]
//* Copyright 2017 The Dawn & Tint Authors
//*
//* Redistribution and use in source and binary forms, with or without
//* modification, are permitted provided that the following conditions are met:
//*
//* 1. Redistributions of source code must retain the above copyright notice, this
//* list of conditions and the following disclaimer.
//*
//* 2. Redistributions in binary form must reproduce the above copyright notice,
//* this list of conditions and the following disclaimer in the documentation
//* and/or other materials provided with the distribution.
//*
//* 3. Neither the name of the copyright holder nor the names of its
//* contributors may be used to endorse or promote products derived from
//* this software without specific prior written permission.
//*
//* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
//* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
//* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
//* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
//* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
//* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
//* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
//* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
//* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
//* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
{% set API = metadata.api.upper() %}
{% set api = API.lower() %}
{% if 'dawn' in enabled_tags %}
#ifdef __EMSCRIPTEN__
#error "Do not include this header. Emscripten already provides headers needed for {{metadata.api}}."
#endif
{% endif %}
#ifndef {{API}}_CPP_H_
#define {{API}}_CPP_H_
#include "{{api}}/{{api}}.h"
#include "{{api}}/{{api}}_cpp_chained_struct.h"
#include "{{api}}/{{api}}_enum_class_bitmasks.h"
#include <cmath>
#include <cstddef>
#include <cstdint>
#include <functional>
namespace {{metadata.namespace}} {
namespace detail {
constexpr size_t ConstexprMax(size_t a, size_t b) {
return a > b ? a : b;
}
} // namespace detail
{% set c_prefix = metadata.c_prefix %}
{% for constant in by_category["constant"] %}
{% set type = as_cppType(constant.type.name) %}
{% set value = c_prefix + "_" + constant.name.SNAKE_CASE() %}
static constexpr {{type}} k{{as_cppType(constant.name)}} = {{ value }};
{% endfor %}
{% for type in by_category["enum"] %}
enum class {{as_cppType(type.name)}} : uint32_t {
{% for value in type.values %}
{{as_cppEnum(value.name)}} = 0x{{format(value.value, "08X")}},
{% endfor %}
};
{% endfor %}
{% for type in by_category["bitmask"] %}
enum class {{as_cppType(type.name)}} : uint32_t {
{% for value in type.values %}
{{as_cppEnum(value.name)}} = 0x{{format(value.value, "08X")}},
{% endfor %}
};
{% endfor %}
{% for type in by_category["function pointer"] %}
using {{as_cppType(type.name)}} = {{as_cType(type.name)}};
{% endfor %}
{% for type in by_category["object"] %}
class {{as_cppType(type.name)}};
{% endfor %}
{% for type in by_category["structure"] %}
struct {{as_cppType(type.name)}};
{% endfor %}
// Special class for booleans in order to allow implicit conversions.
{% set BoolCppType = as_cppType(types["bool"].name) %}
{% set BoolCType = as_cType(types["bool"].name) %}
class {{BoolCppType}} {
public:
constexpr {{BoolCppType}}() = default;
// NOLINTNEXTLINE(runtime/explicit) allow implicit construction
constexpr {{BoolCppType}}(bool value) : mValue(static_cast<{{BoolCType}}>(value)) {}
// NOLINTNEXTLINE(runtime/explicit) allow implicit construction
{{BoolCppType}}({{BoolCType}} value): mValue(value) {}
constexpr operator bool() const { return static_cast<bool>(mValue); }
private:
friend struct std::hash<{{BoolCppType}}>;
// Default to false.
{{BoolCType}} mValue = static_cast<{{BoolCType}}>(false);
};
{% for typeDef in by_category["typedef"] %}
// {{as_cppType(typeDef.name)}} is deprecated.
// Use {{as_cppType(typeDef.type.name)}} instead.
using {{as_cppType(typeDef.name)}} = {{as_cppType(typeDef.type.name)}};
{% endfor %}
template<typename Derived, typename CType>
class ObjectBase {
public:
ObjectBase() = default;
ObjectBase(CType handle): mHandle(handle) {
if (mHandle) Derived::{{c_prefix}}Reference(mHandle);
}
~ObjectBase() {
if (mHandle) Derived::{{c_prefix}}Release(mHandle);
}
ObjectBase(ObjectBase const& other)
: ObjectBase(other.Get()) {
}
Derived& operator=(ObjectBase const& other) {
if (&other != this) {
if (mHandle) Derived::{{c_prefix}}Release(mHandle);
mHandle = other.mHandle;
if (mHandle) Derived::{{c_prefix}}Reference(mHandle);
}
return static_cast<Derived&>(*this);
}
ObjectBase(ObjectBase&& other) {
mHandle = other.mHandle;
other.mHandle = 0;
}
Derived& operator=(ObjectBase&& other) {
if (&other != this) {
if (mHandle) Derived::{{c_prefix}}Release(mHandle);
mHandle = other.mHandle;
other.mHandle = 0;
}
return static_cast<Derived&>(*this);
}
ObjectBase(std::nullptr_t) {}
Derived& operator=(std::nullptr_t) {
if (mHandle != nullptr) {
Derived::{{c_prefix}}Release(mHandle);
mHandle = nullptr;
}
return static_cast<Derived&>(*this);
}
bool operator==(std::nullptr_t) const {
return mHandle == nullptr;
}
bool operator!=(std::nullptr_t) const {
return mHandle != nullptr;
}
explicit operator bool() const {
return mHandle != nullptr;
}
CType Get() const {
return mHandle;
}
CType MoveToCHandle() {
CType result = mHandle;
mHandle = 0;
return result;
}
static Derived Acquire(CType handle) {
Derived result;
result.mHandle = handle;
return result;
}
protected:
CType mHandle = nullptr;
};
{% macro render_cpp_default_value(member, is_struct, force_default=False) -%}
{%- if member.json_data.get("no_default", false) -%}
{%- elif member.annotation in ["*", "const*"] and member.optional or member.default_value == "nullptr" -%}
{{" "}}= nullptr
{%- elif member.type.category == "object" and member.optional and is_struct -%}
{{" "}}= nullptr
{%- elif member.type.category in ["enum", "bitmask"] and member.default_value != None -%}
{{" "}}= {{as_cppType(member.type.name)}}::{{as_cppEnum(Name(member.default_value))}}
{%- elif member.type.category == "native" and member.default_value != None -%}
{{" "}}= {{member.default_value}}
{%- elif member.default_value != None -%}
{{" "}}= {{member.default_value}}
{%- else -%}
{{assert(member.default_value == None)}}
{%- if force_default -%}
{{" "}}= {}
{%- endif -%}
{%- endif -%}
{%- endmacro %}
{% macro render_cpp_method_declaration(type, method) %}
{% set CppType = as_cppType(type.name) %}
{% set OriginalMethodName = method.name.CamelCase() %}
{% set MethodName = OriginalMethodName[:-1] if method.name.chunks[-1] == "f" else OriginalMethodName %}
{{as_cppType(method.return_type.name)}} {{MethodName}}(
{%- for arg in method.arguments -%}
{%- if not loop.first %}, {% endif -%}
{%- if arg.type.category == "object" and arg.annotation == "value" -%}
{{as_cppType(arg.type.name)}} const& {{as_varName(arg.name)}}
{%- else -%}
{{as_annotated_cppType(arg)}}
{%- endif -%}
{{render_cpp_default_value(arg, False)}}
{%- endfor -%}
) const
{%- endmacro %}
{% for type in by_category["object"] %}
{% set CppType = as_cppType(type.name) %}
{% set CType = as_cType(type.name) %}
class {{CppType}} : public ObjectBase<{{CppType}}, {{CType}}> {
public:
using ObjectBase::ObjectBase;
using ObjectBase::operator=;
{% for method in type.methods %}
{{render_cpp_method_declaration(type, method)}};
{% endfor %}
private:
friend ObjectBase<{{CppType}}, {{CType}}>;
static void {{c_prefix}}Reference({{CType}} handle);
static void {{c_prefix}}Release({{CType}} handle);
};
{% endfor %}
{% for function in by_category["function"] if not function.no_cpp %}
{{as_cppType(function.return_type.name)}} {{as_cppType(function.name)}}(
{%- for arg in function.arguments -%}
{%- if not loop.first %}, {% endif -%}
{{as_annotated_cppType(arg)}}{{render_cpp_default_value(arg, False)}}
{%- endfor -%}
);
{% endfor %}
{% for type in by_category["structure"] %}
{% set Out = "Out" if type.output else "" %}
{% set const = "const" if not type.output else "" %}
{% if type.chained %}
{% for root in type.chain_roots %}
// Can be chained in {{as_cppType(root.name)}}
{% endfor %}
struct {{as_cppType(type.name)}} : ChainedStruct{{Out}} {
{{as_cppType(type.name)}}() {
sType = SType::{{type.name.CamelCase()}};
}
{% else %}
struct {{as_cppType(type.name)}} {
{% if type.has_free_members_function %}
{{as_cppType(type.name)}}() = default;
{% endif %}
{% endif %}
{% if type.has_free_members_function %}
~{{as_cppType(type.name)}}();
{{as_cppType(type.name)}}(const {{as_cppType(type.name)}}&) = delete;
{{as_cppType(type.name)}}& operator=(const {{as_cppType(type.name)}}&) = delete;
{{as_cppType(type.name)}}({{as_cppType(type.name)}}&&);
{{as_cppType(type.name)}}& operator=({{as_cppType(type.name)}}&&);
{% endif %}
{% if type.extensible %}
ChainedStruct{{Out}} {{const}} * nextInChain = nullptr;
{% endif %}
{% for member in type.members %}
{% set member_declaration = as_annotated_cppType(member, type.has_free_members_function) + render_cpp_default_value(member, True, type.has_free_members_function) %}
{% if type.chained and loop.first %}
//* Align the first member after ChainedStruct to match the C struct layout.
//* It has to be aligned both to its natural and ChainedStruct's alignment.
static constexpr size_t kFirstMemberAlignment = detail::ConstexprMax(alignof(ChainedStruct{{out}}), alignof({{decorate("", as_cppType(member.type.name), member)}}));
alignas(kFirstMemberAlignment) {{member_declaration}};
{% else %}
{{member_declaration}};
{% endif %}
{% endfor %}
};
{% endfor %}
{%- if metadata.namespace != 'wgpu' %}
// The operators of webgpu_enum_class_bitmasks.h are in the wgpu:: namespace,
// and need to be imported into this namespace for Argument Dependent Lookup.
WGPU_IMPORT_BITMASK_OPERATORS
{% endif %}
} // namespace {{metadata.namespace}}
namespace wgpu {
{% for type in by_category["bitmask"] %}
template<>
struct IsWGPUBitmask<{{metadata.namespace}}::{{as_cppType(type.name)}}> {
static constexpr bool enable = true;
};
{% endfor %}
} // namespace wgpu
namespace std {
// Custom boolean class needs corresponding hash function so that it appears as a transparent bool.
template <>
struct hash<{{metadata.namespace}}::{{BoolCppType}}> {
public:
size_t operator()(const {{metadata.namespace}}::{{BoolCppType}} &v) const {
return hash<bool>()(v);
}
};
} // namespace std
#endif // {{API}}_CPP_H_