#SNG: from basn3p01.png
IHDR {
    width: 32; height: 32; bitdepth: 1;
    using color palette;
}
gAMA {1.0000}
PLTE {
    (238,255, 34)     # rgb = (0xee,0xff,0x22)
    ( 34,102,255)     # rgb = (0x22,0x66,0xff)
}
IMAGE {
    pixels hex
0f0f0f0f
0f0f0f0f
0f0f0f0f
0f0f0f0f
f0f0f0f0
f0f0f0f0
f0f0f0f0
f0f0f0f0
0f0f0f0f
0f0f0f0f
0f0f0f0f
0f0f0f0f
f0f0f0f0
f0f0f0f0
f0f0f0f0
f0f0f0f0
0f0f0f0f

#SNG: from basn3p02.png
IHDR {
    width: 32; height: 32; bitdepth: 2;
    using color palette;
}
gAMA {1.0000}
PLTE {
    (  0,255,  0)     # rgb = (0x00,0xff,0x00)
    (255,  0,  0)     # rgb = (0xff,0x00,0x00)
    (255,255,  0)     # rgb = (0xff,0xff,0x00)
    (  0,  0,255)     # rgb = (0x00,0x00,0xff)
}
IMAGE {
    pixels hex
ff55aa00ff55aa00
ff55aa00ff55aa00
ff55aa00ff55aa00
ff55aa00ff55aa00
00ff55aa00ff55aa

#SNG: from basn3p04-31i.png
IHDR {
    width: 31; height: 31; bitdepth: 4;
    using color palette;
}
gAMA {1.0000}
PLTE {
    ( 34,  0,255)     # rgb = (0x22,0x00,0xff)
    (  0,255,255)     # rgb = (0x00,0xff,0xff)
    (136,  0,255)     # rgb = (0x88,0x00,0xff)
    ( 34,255,  0)     # rgb = (0x22,0xff,0x00)
    (  0,153,255)     # rgb = (0x00,0x99,0xff)
    (255,102,  0)     # rgb = (0xff,0x66,0x00)
    (221,  0,255)     # rgb = (0xdd,0x00,0xff)

#SNG: from basn3p04.png
IHDR {
    width: 32; height: 32; bitdepth: 4;
    using color palette;
}
gAMA {1.0000}
PLTE {
    ( 34,  0,255)     # rgb = (0x22,0x00,0xff)
    (  0,255,255)     # rgb = (0x00,0xff,0xff)
    (136,  0,255)     # rgb = (0x88,0x00,0xff)
    ( 34,255,  0)     # rgb = (0x22,0xff,0x00)
    (  0,153,255)     # rgb = (0x00,0x99,0xff)
    (255,102,  0)     # rgb = (0xff,0x66,0x00)
    (221,  0,255)     # rgb = (0xdd,0x00,0xff)

	if s, ok := fakegAMAs[filename]; ok {
		io.WriteString(w, s)
	} else {
		io.WriteString(w, "gAMA {1.0000}\n")
	}

	// Write the PLTE and tRNS (if applicable).
	useTransparent := false
	if cpm != nil {
		lastAlpha := -1
		io.WriteString(w, "PLTE {\n")
		for i, c := range cpm {
			var r, g, b, a uint8
			switch c := c.(type) {
			case color.RGBA:
				r, g, b, a = c.R, c.G, c.B, 0xff

		}
		d.palette = d.palette[:np]
	case cbTC8, cbTCA8, cbTC16, cbTCA16:
		// As per the PNG spec, a PLTE chunk is optional (and for practical purposes,
		// ignorable) for the ctTrueColor and ctTrueColorAlpha color types (section 4.1.2).
	default:
		return FormatError("PLTE, color type mismatch")
	}
	return d.verifyChecksum()
}

func (d *decoder) parsetRNS(length uint32) error {
	switch d.cb {

#SNG: from ftbwn3p08.png
IHDR {
    width: 32; height: 32; bitdepth: 8;
    using color palette;
}
gAMA {1.0000}
PLTE {
    (255,255,255)     # rgb = (0xff,0xff,0xff) grey100
    (128, 86, 86)     # rgb = (0x80,0x56,0x56)
    (181,181,184)     # rgb = (0xb5,0xb5,0xb8)
    (168, 66, 66)     # rgb = (0xa8,0x42,0x42)
    (159,159,159)     # rgb = (0x9f,0x9f,0x9f)
    (177, 32, 32)     # rgb = (0xb1,0x20,0x20)

#SNG: from ftbbn3p08.png
IHDR {
    width: 32; height: 32; bitdepth: 8;
    using color palette;
}
gAMA {1.0000}
PLTE {
    (255,255,255)     # rgb = (0xff,0xff,0xff) grey100
    (128, 86, 86)     # rgb = (0x80,0x56,0x56)
    (181,181,184)     # rgb = (0xb5,0xb5,0xb8)
    (168, 66, 66)     # rgb = (0xa8,0x42,0x42)
    (159,159,159)     # rgb = (0x9f,0x9f,0x9f)
    (177, 32, 32)     # rgb = (0xb1,0x20,0x20)

#SNG: from basn3p08.png
IHDR {
    width: 32; height: 32; bitdepth: 8;
    using color palette;
}
gAMA {1.0000}
PLTE {
    ( 34, 68,  0)     # rgb = (0x22,0x44,0x00)
    (245,255,237)     # rgb = (0xf5,0xff,0xed)
    (119,255,119)     # rgb = (0x77,0xff,0x77)
    (203,255,255)     # rgb = (0xcb,0xff,0xff)
    ( 17, 10,  0)     # rgb = (0x11,0x0a,0x00)
    ( 58,119,  0)     # rgb = (0x3a,0x77,0x00)
    ( 34, 34,255)     # rgb = (0x22,0x22,0xff)

#SNG: from ftp1n3p08.png
IHDR {
    width: 32; height: 32; bitdepth: 8;
    using color palette;
}
gAMA {1.0000}
PLTE {
    (255,255,255)     # rgb = (0xff,0xff,0xff) grey100
    (128, 86, 86)     # rgb = (0x80,0x56,0x56)
    (181,181,184)     # rgb = (0xb5,0xb5,0xb8)
    (168, 66, 66)     # rgb = (0xa8,0x42,0x42)
    (159,159,159)     # rgb = (0x9f,0x9f,0x9f)
    (177, 32, 32)     # rgb = (0xb1,0x20,0x20)