GeodeWgpuUtil.h File Reference

Small utility shims on top of the wgpu:: C++ wrapper (from eliemichel/WebGPU-distribution's webgpu.hpp) used throughout the Geode renderer. More...

#include <atomic>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <string_view>
#include <utility>
#include <vector>
#include <webgpu/webgpu.hpp>

Include dependency graph for GeodeWgpuUtil.h:

This graph shows which files directly or indirectly include this file:

Classes
class	donner::geode::ScopedWgpuHandle< Handle >
	Move-only RAII owner for a single WebGPU handle. More...
class	donner::geode::ScopedWgpuResourceArena
	Scoped owner for short-lived WebGPU resources used while recording a command encoder. More...

Namespaces
namespace	donner
	Top-level Donner namespace, which is split into different sub-namespaces such as donner::svg and donner::css.

Functions
wgpu::StringView	donner::geode::wgpuLabel (const char *text) noexcept
	Wrap a NUL-terminated C string literal in a wgpu::StringView suitable for direct assignment to a descriptor's label field. std::string_view{} handles the strlen() at compile time when the argument is a literal.
wgpu::StringView	donner::geode::wgpuLabel (std::string_view text) noexcept
	Wrap an arbitrary std::string_view as a wgpu::StringView. Kept separate from wgpuLabel(const char*) so the common label-literal call path stays trivially copyable without pulling string_view into callers that don't already need it.
bool	donner::geode::wgpuForceFallbackAdapterRequested () noexcept
	Whether headless WebGPU creation should request a software fallback adapter. Tests exercise the platform-default hardware adapter unless the environment variable is set explicitly, for example while regenerating deterministic software-rendered goldens.
template<typename Handle>
void	donner::geode::ReleaseWgpuHandle (Handle &handle)
	Release a raw WebGPU handle and reset the wrapper to null.

Variables
constexpr uint32_t	donner::geode::kGradientPaintBlockRows = 25u
	Rows of one gradient paint block, in vec4 units. The block holds the gradient transform, its two-point or two-circle geometry, and a full stop ramp; paintData in shaders/slug_fill.wgsl documents the row layout and GeoEncoder writes it. Shared here so the device's zero-filled dummy binding and the encoder's region reservation cannot drift apart.

Detailed Description

Small utility shims on top of the wgpu:: C++ wrapper (from eliemichel/WebGPU-distribution's webgpu.hpp) used throughout the Geode renderer.

The vendored webgpu.hpp wraps wgpu-native's C API directly - its wgpu::StringView only has a std::string_view constructor, which makes the otherwise-common descriptor.label = "..." assignment verbose. The helpers in this header exist so the rest of the Geode code can stay readable:

desc.label = wgpuLabel("GeodePipeline");

rather than spelling out the std::string_view wrap at every site. This file also provides a small RAII owner for WebGPU handles returned from create / acquire calls. The vendored webgpu.hpp objects are typed raw handles, not owning smart handles.

Function Documentation

ReleaseWgpuHandle()

template<typename Handle>

void donner::geode::ReleaseWgpuHandle

(

Handle &

handle

)

Release a raw WebGPU handle and reset the wrapper to null.

Template Parameters

Handle

A wgpu:: handle type with operator bool() and release().

Parameters

handle

Owned raw handle to release.