# FsCompositeOperation<no value>
The **FsCompositeOperation** represents a composite operation used to combined a source pixel and a destination pixel into a final pixel.

 

##### Syntax

``` wasm
struct FsCompositeOperationState {
    int srcRGB;
    int dstRGB;
    int srcAlpha;
    int dstAlpha;
};
```

 

##### Members

{{< table-wrapper >}}

| Member     | Description                                                 |
|------------|-------------------------------------------------------------|
| `srcRGB`   | RGB source pixel, one of the constants listed below.        |
| `dstRGB`   | RGB destination pixel, one of the constants listed below.   |
| `srcAlpha` | Alpha source pixel, one of the constants listed below.      |
| `dstAlpha` | Alpha destination pixel, one of the constants listed below. |

{{< /table-wrapper >}}


 

##### Remarks

The members of the struct can take one of the following blend factor constants:

<table><thead><tr class="header"><th>Constant</th><th><p>RGB Blend Factors</p><p>(Sr, Sg, Sb) or (Dr, Dg, Db)</p></th><th><p>Alpha Blend Factor</p><p>(Sa) or (Da)</p></th></tr></thead><tbody><tr class="odd"><td><code>FS_ZERO</code></td><td>(0, 0, 0)</td><td>0</td></tr><tr class="even"><td><code>FS_ONE</code></td><td>(1, 1, 1)</td><td>1</td></tr><tr class="odd"><td><code>FS_SRC_COLOR</code></td><td>(Rs, Gs, Bs)</td><td>As</td></tr><tr class="even"><td><code>FS_ONE_MINUS_SRC_COLOR</code></td><td>(1, 1, 1) - (Rs, Gs, Bs)</td><td>1 - As</td></tr><tr class="odd"><td><code>FS_DST_COLOR</code></td><td>(Rd, Gd, Bd)</td><td>Ad</td></tr><tr class="even"><td><code>FS_ONE_MINUS_DST_COLOR</code></td><td>(1, 1, 1) - (Rd, Gd, Bd)</td><td>1 - Ad</td></tr><tr class="odd"><td><code>FS_SRC_ALPHA</code></td><td>(As, As, As)</td><td>As</td></tr><tr class="even"><td><code>FS_ONE_MINUS_SRC_ALPHA</code></td><td>(1, 1, 1) - (As, As, As)</td><td>1 - As</td></tr><tr class="odd"><td><code>FS_DST_ALPHA</code></td><td>(Ad, Ad, Ad)</td><td>Ad</td></tr><tr class="even"><td><code>FS_ONE_MINUS_DST_ALPHA</code></td><td>(1, 1, 1) - (Ad, Ad, Ad)</td><td>1 - Ad</td></tr><tr class="odd"><td><code>FS_SRC_ALPHA_SATURATE</code></td><td>(f, f, f) (*2)</td><td>1</td></tr></tbody></table>