279 lines
9.7 KiB
C++
279 lines
9.7 KiB
C++
//* Copyright 2017 The Dawn Authors
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//*
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//* Licensed under the Apache License, Version 2.0 (the "License");
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//* you may not use this file except in compliance with the License.
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//* You may obtain a copy of the License at
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//*
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//* http://www.apache.org/licenses/LICENSE-2.0
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//*
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//* Unless required by applicable law or agreed to in writing, software
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//* distributed under the License is distributed on an "AS IS" BASIS,
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//* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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//* See the License for the specific language governing permissions and
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//* limitations under the License.
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{% set API = metadata.api.upper() %}
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{% set api = API.lower() %}
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{% if 'dawn' not in enabled_tags %}
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#ifdef __EMSCRIPTEN__
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#error "Do not include this header. Emscripten already provides headers needed for {{metadata.api}}."
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#endif
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{% endif %}
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#ifndef {{API}}_CPP_H_
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#define {{API}}_CPP_H_
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#include "dawn/{{api}}.h"
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#include "dawn/EnumClassBitmasks.h"
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#include <cmath>
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namespace {{metadata.namespace}} {
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namespace detail {
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constexpr size_t ConstexprMax(size_t a, size_t b) {
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return a > b ? a : b;
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}
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} // namespace detail
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{% set c_prefix = metadata.c_prefix %}
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{% for constant in by_category["constant"] %}
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{% set type = as_cppType(constant.type.name) %}
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{% set value = c_prefix + "_" + constant.name.SNAKE_CASE() %}
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static constexpr {{type}} k{{as_cppType(constant.name)}} = {{ value }};
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{% endfor %}
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{% for type in by_category["enum"] %}
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enum class {{as_cppType(type.name)}} : uint32_t {
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{% for value in type.values %}
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{{as_cppEnum(value.name)}} = 0x{{format(value.value, "08X")}},
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{% endfor %}
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};
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{% endfor %}
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// Special case definition of MipmapFilterMode for Dawn side.
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// TODO(lokokung) Remove once Chromium side is updated.
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{% if 'dawn' in enabled_tags %}
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using MipmapFilterMode = FilterMode;
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{% endif %}
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{% for type in by_category["bitmask"] %}
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enum class {{as_cppType(type.name)}} : uint32_t {
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{% for value in type.values %}
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{{as_cppEnum(value.name)}} = 0x{{format(value.value, "08X")}},
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{% endfor %}
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};
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{% endfor %}
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{% for type in by_category["function pointer"] %}
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using {{as_cppType(type.name)}} = {{as_cType(type.name)}};
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{% endfor %}
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{% for type in by_category["object"] %}
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class {{as_cppType(type.name)}};
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{% endfor %}
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{% for type in by_category["structure"] %}
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struct {{as_cppType(type.name)}};
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{% endfor %}
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{% for typeDef in by_category["typedef"] %}
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// {{as_cppType(typeDef.name)}} is deprecated.
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// Use {{as_cppType(typeDef.type.name)}} instead.
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using {{as_cppType(typeDef.name)}} = {{as_cppType(typeDef.type.name)}};
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{% endfor %}
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template<typename Derived, typename CType>
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class ObjectBase {
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public:
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ObjectBase() = default;
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ObjectBase(CType handle): mHandle(handle) {
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if (mHandle) Derived::{{c_prefix}}Reference(mHandle);
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}
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~ObjectBase() {
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if (mHandle) Derived::{{c_prefix}}Release(mHandle);
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}
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ObjectBase(ObjectBase const& other)
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: ObjectBase(other.Get()) {
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}
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Derived& operator=(ObjectBase const& other) {
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if (&other != this) {
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if (mHandle) Derived::{{c_prefix}}Release(mHandle);
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mHandle = other.mHandle;
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if (mHandle) Derived::{{c_prefix}}Reference(mHandle);
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}
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return static_cast<Derived&>(*this);
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}
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ObjectBase(ObjectBase&& other) {
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mHandle = other.mHandle;
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other.mHandle = 0;
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}
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Derived& operator=(ObjectBase&& other) {
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if (&other != this) {
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if (mHandle) Derived::{{c_prefix}}Release(mHandle);
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mHandle = other.mHandle;
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other.mHandle = 0;
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}
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return static_cast<Derived&>(*this);
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}
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ObjectBase(std::nullptr_t) {}
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Derived& operator=(std::nullptr_t) {
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if (mHandle != nullptr) {
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Derived::{{c_prefix}}Release(mHandle);
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mHandle = nullptr;
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}
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return static_cast<Derived&>(*this);
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}
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bool operator==(std::nullptr_t) const {
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return mHandle == nullptr;
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}
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bool operator!=(std::nullptr_t) const {
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return mHandle != nullptr;
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}
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explicit operator bool() const {
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return mHandle != nullptr;
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}
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CType Get() const {
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return mHandle;
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}
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CType Release() {
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CType result = mHandle;
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mHandle = 0;
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return result;
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}
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static Derived Acquire(CType handle) {
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Derived result;
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result.mHandle = handle;
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return result;
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}
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protected:
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CType mHandle = nullptr;
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};
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{% macro render_cpp_default_value(member, is_struct=True) -%}
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{%- if member.json_data.get("no_default", false) -%}
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{%- elif member.annotation in ["*", "const*"] and member.optional or member.default_value == "nullptr" -%}
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{{" "}}= nullptr
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{%- elif member.type.category == "object" and member.optional and is_struct -%}
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{{" "}}= nullptr
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{%- elif member.type.category in ["enum", "bitmask"] and member.default_value != None -%}
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{{" "}}= {{as_cppType(member.type.name)}}::{{as_cppEnum(Name(member.default_value))}}
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{%- elif member.type.category == "native" and member.default_value != None -%}
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{{" "}}= {{member.default_value}}
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{%- elif member.default_value != None -%}
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{{" "}}= {{member.default_value}}
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{%- else -%}
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{{assert(member.default_value == None)}}
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{%- endif -%}
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{%- endmacro %}
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{% macro render_cpp_method_declaration(type, method) %}
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{% set CppType = as_cppType(type.name) %}
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{{as_cppType(method.return_type.name)}} {{method.name.CamelCase()}}(
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{%- for arg in method.arguments -%}
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{%- if not loop.first %}, {% endif -%}
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{%- if arg.type.category == "object" and arg.annotation == "value" -%}
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{{as_cppType(arg.type.name)}} const& {{as_varName(arg.name)}}
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{%- else -%}
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{{as_annotated_cppType(arg)}}
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{%- endif -%}
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{{render_cpp_default_value(arg, False)}}
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{%- endfor -%}
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) const
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{%- endmacro %}
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{% for type in by_category["object"] %}
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{% set CppType = as_cppType(type.name) %}
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{% set CType = as_cType(type.name) %}
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class {{CppType}} : public ObjectBase<{{CppType}}, {{CType}}> {
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public:
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using ObjectBase::ObjectBase;
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using ObjectBase::operator=;
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{% for method in type.methods %}
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{{render_cpp_method_declaration(type, method)}};
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{% endfor %}
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private:
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friend ObjectBase<{{CppType}}, {{CType}}>;
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static void {{c_prefix}}Reference({{CType}} handle);
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static void {{c_prefix}}Release({{CType}} handle);
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};
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{% endfor %}
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{% for function in by_category["function"] %}
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{{as_cppType(function.return_type.name)}} {{as_cppType(function.name)}}(
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{%- for arg in function.arguments -%}
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{%- if not loop.first %}, {% endif -%}
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{{as_annotated_cppType(arg)}}{{render_cpp_default_value(arg, False)}}
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{%- endfor -%}
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);
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{% endfor %}
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struct ChainedStruct {
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ChainedStruct const * nextInChain = nullptr;
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SType sType = SType::Invalid;
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};
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struct ChainedStructOut {
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ChainedStruct * nextInChain = nullptr;
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SType sType = SType::Invalid;
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};
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{% for type in by_category["structure"] %}
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{% set Out = "Out" if type.output else "" %}
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{% set const = "const" if not type.output else "" %}
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{% if type.chained %}
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{% for root in type.chain_roots %}
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// Can be chained in {{as_cppType(root.name)}}
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{% endfor %}
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struct {{as_cppType(type.name)}} : ChainedStruct{{Out}} {
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{{as_cppType(type.name)}}() {
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sType = SType::{{type.name.CamelCase()}};
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}
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{% else %}
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struct {{as_cppType(type.name)}} {
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{% endif %}
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{% if type.extensible %}
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ChainedStruct{{Out}} {{const}} * nextInChain = nullptr;
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{% endif %}
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{% for member in type.members %}
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{% set member_declaration = as_annotated_cppType(member) + render_cpp_default_value(member) %}
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{% if type.chained and loop.first %}
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//* Align the first member after ChainedStruct to match the C struct layout.
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//* It has to be aligned both to its natural and ChainedStruct's alignment.
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static constexpr size_t kFirstMemberAlignment = detail::ConstexprMax(alignof(ChainedStruct{{out}}), alignof({{decorate("", as_cppType(member.type.name), member)}}));
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alignas(kFirstMemberAlignment) {{member_declaration}};
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{% else %}
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{{member_declaration}};
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{% endif %}
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{% endfor %}
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};
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{% endfor %}
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// The operators of EnumClassBitmmasks in the dawn:: namespace need to be imported
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// in the {{metadata.namespace}} namespace for Argument Dependent Lookup.
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DAWN_IMPORT_BITMASK_OPERATORS
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} // namespace {{metadata.namespace}}
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namespace dawn {
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{% for type in by_category["bitmask"] %}
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template<>
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struct IsDawnBitmask<{{metadata.namespace}}::{{as_cppType(type.name)}}> {
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static constexpr bool enable = true;
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};
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{% endfor %}
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} // namespace dawn
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#endif // {{API}}_CPP_H_
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