donner::svg::compositor::DualPathVerifier Class Reference

Dual-path assertion harness for composited rendering. More...

#include "donner/svg/compositor/DualPathVerifier.h"

Classes
struct	VerifyResult
	Result of a dual-path verification pass. More...

Public Member Functions
	DualPathVerifier (CompositorController &compositor, RendererInterface &renderer)
	Construct a dual-path verifier.
VerifyResult	renderAndVerify (const RenderViewport &viewport)
	Render a frame through both paths and compare the results.
const VerifyResult &	lastResult () const
	Returns the result of the last renderAndVerify() call.
const RendererBitmap &	compositorSnapshot () const
	Returns the compositor snapshot from the last verification.
const RendererBitmap &	referenceSnapshot () const
	Returns the reference snapshot from the last verification.

Detailed Description

Dual-path assertion harness for composited rendering.

Runs both the compositor path and a full re-render reference path, then pixel-diffs the results. Use this to verify that composited output matches the ground truth during development and testing.

The harness wraps a CompositorController and a RendererInterface, intercepting renderFrame to additionally perform a reference render and diff.

Usage in tests:

DualPathVerifier verifier(compositor, renderer);
verifier.renderAndVerify(viewport);
EXPECT_EQ(verifier.mismatchCount(), 0u);

Constructor & Destructor Documentation

DualPathVerifier()

donner::svg::compositor::DualPathVerifier::DualPathVerifier	(	CompositorController &	compositor,
		RendererInterface &	renderer )

Construct a dual-path verifier.

Parameters

compositor	The compositor controller to verify.
renderer	The renderer backend used for both the compositor and reference paths.

Member Function Documentation

renderAndVerify()

VerifyResult donner::svg::compositor::DualPathVerifier::renderAndVerify

(

const RenderViewport &

viewport

)

Render a frame through both paths and compare the results.

1. Renders via compositor.renderFrame(viewport) and captures a snapshot.
2. Renders via RendererDriver::draw(document) and captures a snapshot.
3. Pixel-diffs the two snapshots.

Parameters

viewport

The viewport for both render passes.

Returns

The verification result.

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The documentation for this class was generated from the following file:

• donner/svg/compositor/DualPathVerifier.h