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MILEFFECTSERR_OUTPUTSIZETOOLARGE
MILEFFECTSERR_OUTPUTSIZETOOLARGE identifies a failure in MIL oversized effect output. The effect graph calculated output bounds too large for the rendering path or resource limits. Investigation of MILEFFECTSERR_OUTPUTSIZETOOLARGE should preserve the original object generation before cleanup, retry, or fallback creates a secondary result.
Capture before changing state
| Record | Why it matters here |
|---|---|
| Effect instance and owning graph or group identity | Comparing effect instance and owning graph or group identity shows whether MILEFFECTSERR_OUTPUTSIZETOOLARGE follows input, object state, or environment. |
| Connector, input, child, listener, property, or transform involved | Preserving connector, input, child, listener, property, or transform involved provides the evidence needed to test this distinction: eMPTYBOUNDS indicates no drawable area; this result indicates an excessively large one. |
| Calculated input and output bounds | For MILEFFECTSERR_OUTPUTSIZETOOLARGE, recording calculated input and output bounds separates the MIL oversized effect output boundary from a later wrapper symptom. |
| Construction sequence and first method returning the HRESULT | In MILEFFECTSERR_OUTPUTSIZETOOLARGE diagnostics, recording construction sequence and first method returning the HRESULT ties the HRESULT to the MIL oversized effect output boundary rather than to the final visible failure. |
Read the HRESULT in context
Oversized output is the opposite of empty output: bounds propagation remains nonempty but expands beyond the rendering path or resource limits in the MILEFFECTSERR_OUTPUTSIZETOOLARGE path. For MILEFFECTSERR_OUTPUTSIZETOOLARGE, blur radii, convolution kernels, scaling, DPI, and chained transforms can multiply dimensions or add margins at several nodes. When MILEFFECTSERR_OUTPUTSIZETOOLARGE is returned, the first node that crosses the accepted surface limit is more useful than the final allocation failure.
For MILEFFECTSERR_OUTPUTSIZETOOLARGE, inspect the following boundary: bounds propagation through transforms, kernels, blur radii, scaling, and intermediate surfaces.
A minimal test sequence
When MILEFFECTSERR_OUTPUTSIZETOOLARGE is returned, record width and height after every graph node, together with scale, kernel, radius, DPI, and device maximums. Reduce the dominant expansion parameter or process a smaller region; do not change clipping and device selection simultaneously in the MILEFFECTSERR_OUTPUTSIZETOOLARGE path.
- Reduce one expansion parameter at a time and compare the calculated rectangle with device limits in the MILEFFECTSERR_OUTPUTSIZETOOLARGE path.
- For MILEFFECTSERR_OUTPUTSIZETOOLARGE, rebuild the smallest graph containing only the implicated node and one known input.
- When MILEFFECTSERR_OUTPUTSIZETOOLARGE is returned, log ownership changes and graph generation numbers.
- Validate the graph before allocating large intermediate resources in the MILEFFECTSERR_OUTPUTSIZETOOLARGE path.
Common wrong turns
EMPTYBOUNDS indicates no drawable area; this result indicates an excessively large one. For MILEFFECTSERR_OUTPUTSIZETOOLARGE, do not catch the HRESULT and continue rendering with a partially connected graph; later failures can obscure the invariant that was first violated.
Three diagnostic branches
| Test | Interpretation | Hold constant |
|---|---|---|
| Same environment, reduced input | If MILEFFECTSERR_OUTPUTSIZETOOLARGE disappears with a smaller faithful case, complexity within MIL oversized effect output is implicated. | For MILEFFECTSERR_OUTPUTSIZETOOLARGE, keep effect instance and owning graph or group identity fixed while simplifying calculated input and output bounds. |
| Same input, fresh object generation | If MILEFFECTSERR_OUTPUTSIZETOOLARGE changes after rebuilding state, examine ownership across the effect instance, connector builder, graph owner, listener, and bounds calculator. | For MILEFFECTSERR_OUTPUTSIZETOOLARGE, place connector, input, child, listener, property, or transform involved on the timeline of the last successful transition. |
| Same operation on a controlled second path | If MILEFFECTSERR_OUTPUTSIZETOOLARGE follows one environment, the failure is not explained by source data alone. | For MILEFFECTSERR_OUTPUTSIZETOOLARGE, compare visual generation, effect registration, shader profile, rendering tier, and target dimensions while preserving construction sequence and first method returning the HRESULT. |
Regression verification
A correction for MILEFFECTSERR_OUTPUTSIZETOOLARGE should let the operation at the MIL oversized effect output boundary complete repeatedly under the original supported conditions. Repeat the control that begins with “Reduce one expansion parameter at a time and compare the calculated rectangle with device limits” and confirm that the following lifecycle step also succeeds. For MILEFFECTSERR_OUTPUTSIZETOOLARGE, keep the original failing sample and one deliberate negative case so fallback cannot be mistaken for repair.
Technical references
When MILEFFECTSERR_OUTPUTSIZETOOLARGE is returned, these references define the public API family, object model, or error list used to interpret this status.
- Microsoft Open Specifications: HRESULT values.
- Microsoft: WPF bitmap effects overview.
- Microsoft: PixelShader class.
- Microsoft: Direct2D custom effects.
- Microsoft: ID2D1TransformGraph.
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