PNG Test

### Filtering

filter changing per scanline, grayscale, 4 bit
no filtering, colour, 8 bit
no filtering, grayscale, 8 bit
filter 3, colour, 8 bit
filter 3, grayscale, 8 bit
filter 2, colour, 8 bit
filter 2, grayscale, 8 bit
filter 1, colour, 8 bit
filter 1, grayscale, 8 bit
filter 0, colour, 8 bit
filter 0, grayscale, 8 bit

### Ancilary chunks

### Basic

### ZLib

### Transparency

### Sizing

### Pallettes

### Chunk Ordering

### Gamma