zscript-doc/api-drawing-TexMan.md

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# TexMan
The **Tex**ture **Man**ager is used for loading, finding, replacing and getting information on textures.
```
struct TexMan
{
static textureid CheckForTexture(string name, int usetype, int flags = TexMan.TryAny);
static int CheckRealHeight(textureid tex);
static string GetName(textureid tex);
static vector2 GetScaledOffset(textureid tex);
static vector2 GetScaledSize(textureid tex);
static int, int GetSize(textureid tex);
static void ReplaceTextures(string from, string to, int flags);
static void SetCameraToTexture(Actor viewpoint, string texture, double fov);
}
```
- `CheckForTexture`
Returns a `textureid` for the texture named `name`. `usetype` may be one of the following, which selects what kind of texture to find:
| Name | Description |
| ---- | ----------- |
| `TexMan.Type_Any` | Any kind of texture. |
| `TexMan.Type_Autopage` | Unused. |
| `TexMan.Type_Build` | Unused. |
| `TexMan.Type_Decal` | A decal pic defined in `DECALDEF`. |
| `TexMan.Type_FirstDefined` | The first composite texture defined by the IWad. |
| `TexMan.Type_Flat` | A flat (ceiling/floor texture,) i.e. `FLOOR0_1`. |
| `TexMan.Type_FontChar` | Unused. |
| `TexMan.Type_MiscPatch` | A loose graphic, i.e. `M_DOOM`. |
| `TexMan.Type_Null` | Reserved for the null graphic. Ignores `name`. |
| `TexMan.Type_Override` | Overridable generalized textures, for instance textures defined in `TX_START` or BUILD ART tiles. |
| `TexMan.Type_SkinGraphic` | Any loose graphic defined in `S_SKIN` i.e. statusbar faces. |
| `TexMan.Type_SkinSprite` | Any sprite defined in `S_SKIN`. |
| `TexMan.Type_Sprite` | A sprite in `S_START`, i.e. `MEDIA0`. |
| `TexMan.Type_WallPatch` | An uncomposited patch, i.e. `DOOR2_1`. |
| `TexMan.Type_Wall` | Any composited wall texture, i.e. `STARTAN2`. |
`flags` may be any of the following combined (with the bitwise OR operator `|`:)
| Name | Description |
| ---- | ----------- |
| `TexMan.AllowSkins` | Allows `SkinGraphic`s to be returned under normal circumstances. |
| `TexMan.DontCreate` | Will never create a new texture when searching. |
| `TexMan.Overridable` | Allows overriding of this texture by for instance `TEXTURES`. |
| `TexMan.ReturnFirst` | Allows returning the `FirstDefined` "null" texture under normal circumstances. |
| `TexMan.ShortNameOnly` | Will force use of a short name when searching. |
| `TexMan.TryAny` | Returns any other type of texture if one is not found in the specified use type. Default. |
- `CheckRealHeight`
Returns the height in pixels of the texture down to the last scanline which has actual pixel data. Note that this operation is extremely slow and should be used sparingly.
- `GetName`
Returns the original name of a `textureid`.
- `GetScaledOffset`
Returns the offsets for this texture used to display it (rather than the original offsets.)
- `GetScaledSize`
Returns the size used to display this texture (rather than the physical size.)
- `GetSize`
Returns the width and height of a `textureid`.
- `ReplaceTextures`
Replaces textures named `from` with `to` within the map. `flags` may be used to filter out certain textures from being replaced:
| Name | Description |
| ---- | ----------- |
| `TexMan.NOT_BOTTOM` | Filters out linedef bottom textures. |
| `TexMan.NOT_CEILING` | Filters out ceiling flats. |
| `TexMan.NOT_FLAT` | Filters out any flat texture. |
| `TexMan.NOT_FLOOR` | Filters out floor flats. |
| `TexMan.NOT_MIDDLE` | Filters out linedef middle textures. |
| `TexMan.NOT_TOP` | Filters out linedef upper textures. |
| `TexMan.NOT_WALL` | Filters out any linedef texture. |
- `SetCameraToTexture`
Sets the camera texture (as defined in `ANIMDEFS`) `texture` to the viewpoint of `viewpoint` with a fov of `fov`.
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