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Wire: Add support from optional struct/integer const*

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This will allow implementing the following part of the WebGPU IDL using
a nullable pointer instead of an extra hasDepthStencilState boolean:

partial interface GPURenderPipelineDescriptor {
    GPUDepthStencilStateDescriptor? depthStencilState;
};

BUG=dawn:102

Change-Id: Iae709831ad857fcef073f18753ab39567a8797da
Reviewed-on: https://dawn-review.googlesource.com/c/4500
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Yunchao He <yunchao.he@intel.com>
This commit is contained in:
Corentin Wallez
2019-02-13 10:15:38 +00:00
committed by Commit Bot service account
parent bb5696bcd3
commit f872e6924c
3 changed files with 155 additions and 1 deletions
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19
generator/templates/dawn_wire/WireCmd.cpp
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@@ -105,6 +105,10 @@
{% for member in members if member.length == "strlen" %}
size_t {{as_varName(member.name)}}Strlen;
{% endfor %}
{% for member in members if member.annotation != "value" and member.type.category != "object" %}
bool has_{{as_varName(member.name)}};
{% endfor %}
};
//* Returns the required transfer size for `record` in addition to the transfer structure.
@@ -120,6 +124,9 @@
//* Gather how much space will be needed for pointer members.
{% for member in members if member.annotation != "value" and member.length != "strlen" %}
{% if member.type.category != "object" and member.optional %}
if (record.{{as_varName(member.name)}} != nullptr)
{% endif %}
{
size_t memberLength = {{member_length(member, "record.")}};
result += memberLength * {{member_transfer_sizeof(member)}};
@@ -176,6 +183,12 @@
//* Allocate space and write the non-value arguments in it.
{% for member in members if member.annotation != "value" and member.length != "strlen" %}
{% set memberName = as_varName(member.name) %}
{% if member.type.category != "object" and member.optional %}
bool has_{{memberName}} = record.{{memberName}} != nullptr;
transfer->has_{{memberName}} = has_{{memberName}};
if (has_{{memberName}})
{% endif %}
{
size_t memberLength = {{member_length(member, "record.")}};
auto memberBuffer = reinterpret_cast<{{member_transfer_type(member)}}*>(*buffer);
@@ -277,6 +290,12 @@
//* Get extra buffer data, and copy pointed to values in extra allocated space.
{% for member in members if member.annotation != "value" and member.length != "strlen" %}
{% set memberName = as_varName(member.name) %}
{% if member.type.category != "object" and member.optional %}
bool has_{{memberName}} = transfer->has_{{memberName}};
record->{{memberName}} = nullptr;
if (has_{{memberName}})
{% endif %}
{
size_t memberLength = {{member_length(member, "record->")}};
auto memberBuffer = reinterpret_cast<const {{member_transfer_type(member)}}*>(buffer);