PNGConstants (org.apache.xmlgraphics:xmlgraphics-commons 2.3 API)

```
public interface PNGConstants
```

Field Summary

Fields
Modifier and Type	Field	Description
`static int`	`PNG_COLOR_GRAY`
`static int`	`PNG_COLOR_GRAY_ALPHA`
`static int`	`PNG_COLOR_PALETTE`
`static int`	`PNG_COLOR_RGB`
`static int`	`PNG_COLOR_RGB_ALPHA`
`static int`	`PNG_FILTER_AVERAGE`
`static int`	`PNG_FILTER_NONE`
`static int`	`PNG_FILTER_PAETH`
`static int`	`PNG_FILTER_SUB`
`static int`	`PNG_FILTER_UP`
`static long`	`PNG_SIGNATURE`

- Field Detail
  - PNG_SIGNATURE
```
static final long PNG_SIGNATURE
```
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    Constant Field Values
  - PNG_COLOR_GRAY
```
static final int PNG_COLOR_GRAY
```
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    Constant Field Values
  - PNG_COLOR_RGB
```
static final int PNG_COLOR_RGB
```
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    Constant Field Values
  - PNG_COLOR_PALETTE
```
static final int PNG_COLOR_PALETTE
```
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    Constant Field Values
  - PNG_COLOR_GRAY_ALPHA
```
static final int PNG_COLOR_GRAY_ALPHA
```
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    Constant Field Values
  - PNG_COLOR_RGB_ALPHA
```
static final int PNG_COLOR_RGB_ALPHA
```
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    Constant Field Values
  - PNG_FILTER_NONE
```
static final int PNG_FILTER_NONE
```
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    Constant Field Values
  - PNG_FILTER_SUB
```
static final int PNG_FILTER_SUB
```
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    Constant Field Values
  - PNG_FILTER_UP
```
static final int PNG_FILTER_UP
```
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    Constant Field Values
  - PNG_FILTER_AVERAGE
```
static final int PNG_FILTER_AVERAGE
```
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    Constant Field Values
  - PNG_FILTER_PAETH
```
static final int PNG_FILTER_PAETH
```
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    Constant Field Values