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The posterize effect reduces the number of unique colors in an image.
The CLSID for this effect is CLSID_D2D1Posterize.
Example image
Sample code
ComPtr<ID2D1Effect> posterizeEffect;
m_d2dContext->CreateEffect(CLSID_D2D1Posterize, &posterizeEffect);
posterizeEffect->SetInput(0, bitmap);
posterizeEffect->SetValue(D2D1_POSTERIZE_PROP_RED_VALUE_COUNT, 4);
posterizeEffect->SetValue(D2D1_POSTERIZE_PROP_GREEN_VALUE_COUNT, 4);
posterizeEffect->SetValue(D2D1_POSTERIZE_PROP_BLUE_VALUE_COUNT, 4);
m_d2dContext->BeginDraw();
m_d2dContext->DrawImage(posterizeEffect.Get());
m_d2dContext->EndDraw();
Effect properties
The properties for the posterize effect are defined by the D2D1_POSTERIZE_PROP enumeration.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 10 [desktop apps | Windows Store apps] |
| Minimum supported server | Windows 10 [desktop apps | Windows Store apps] |
| Header | d2d1effects_2.h |
| Library | d2d1.lib, dxguid.lib |