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New apng disassembler

This commit is contained in:
oupson 2018-12-08 16:50:51 +01:00
parent 21668d50c7
commit cefb4ca9f4
4 changed files with 169 additions and 409 deletions
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351
apng_library/src/main/java/oupson/apng/APNGDisassembler.kt
View File

@ -8,228 +8,207 @@ import oupson.apng.utils.Utils
import oupson.apng.utils.Utils.Companion.isApng
import oupson.apng.utils.Utils.Companion.pngSignature
import oupson.apng.utils.Utils.Companion.to4Bytes
import java.util.*
import java.util.zip.CRC32
class APNGDisassembler {
companion object {
private var png: ArrayList<Byte>? = null
private var cover: ArrayList<Byte>? = null
private var delay = -1f
private var yOffset = -1
private var xOffset = -1
private var plte: ByteArray? = null
private var tnrs: ByteArray? = null
private var maxWidth = 0
private var maxHeight = 0
private var blend_op: Utils.Companion.blend_op = Utils.Companion.blend_op.APNG_BLEND_OP_SOURCE
private var dispose_op: Utils.Companion.dispose_op = Utils.Companion.dispose_op.APNG_DISPOSE_OP_NONE
var apng: Apng = Apng()
private val ihdr = IHDR()
fun disassemble(byteArray: ByteArray) : Apng {
val pngList = ArrayList<Frame>()
var png: ArrayList<Byte>? = null
var cover: ArrayList<Byte>? = null
var delay = -1f
var yOffset = -1
var xOffset = -1
var plte: ByteArray? = null
var tnrs: ByteArray? = null
var maxWidth = 0
var maxHeight = 0
var blend_op: Utils.Companion.blend_op = Utils.Companion.blend_op.APNG_BLEND_OP_SOURCE
var dispose_op: Utils.Companion.dispose_op = Utils.Companion.dispose_op.APNG_DISPOSE_OP_NONE
val apng: Apng
if (isApng(byteArray)) {
apng = Apng()
val ihdr = IHDR()
ihdr.parseIHDR(byteArray)
maxWidth = ihdr.pngWidth
maxHeight = ihdr.pngHeight
for (i in 0 until byteArray.size) {
// find new Frame with fcTL
if (byteArray[i] == 0x66.toByte() && byteArray[i + 1] == 0x63.toByte() && byteArray[i + 2] == 0x54.toByte() && byteArray[i + 3] == 0x4C.toByte()) {
if (png == null) {
if (cover != null) {
cover.addAll(to4Bytes(0).toList())
// Add IEND
val iend = byteArrayOf(0x49, 0x45, 0x4E, 0x44)
// Generate crc for IEND
val crC32 = CRC32()
crC32.update(iend, 0, iend.size)
cover.addAll(iend.toList())
cover.addAll(to4Bytes(crC32.value.toInt()).toList())
apng.cover = BitmapFactory.decodeByteArray(cover.toByteArray(), 0, cover.size)
}
var cursor = 8
while (cursor < byteArray.size) {
val chunk = byteArray.copyOfRange(cursor, cursor + parseLength(byteArray.copyOfRange(cursor, cursor + 4)) + 12)
parseChunk(chunk)
cursor += parseLength(byteArray.copyOfRange(cursor, cursor + 4)) + 12
}
return apng
} else {
throw NotApngException()
}
}
png = ArrayList()
val fcTL = fcTL(byteArray.copyOfRange(i - 4, i + 36))
delay = fcTL.delay
yOffset = fcTL.y_offset
xOffset = fcTL.x_offset
blend_op = fcTL.blend_op
dispose_op = fcTL.dispose_op
val width = fcTL.pngWidth
val height = fcTL.pngHeight
png.addAll(pngSignature.toList())
png.addAll(generate_ihdr(ihdr, width, height).toList())
private fun parseLength(byteArray: ByteArray) : Int {
var lengthString = ""
byteArray.forEach {
lengthString += String.format("%02x", it)
}
return lengthString.toLong(16).toInt()
}
if (plte != null) {
png.addAll(plte.toList())
}
private fun generateIhdr(ihdrOfApng: IHDR, width : Int, height : Int) : ByteArray {
val ihdr = ArrayList<Byte>()
// We need a body var to know body length and generate crc
val ihdrBody = ArrayList<Byte>()
// Add chunk body length
ihdr.addAll(to4Bytes(ihdrOfApng.ihdrCorps.size).toList())
// Add IHDR
ihdrBody.addAll(byteArrayOf(0x49.toByte(), 0x48.toByte(), 0x44.toByte(), 0x52.toByte()).toList())
// Add the max width and height
ihdrBody.addAll(to4Bytes(width).toList())
ihdrBody.addAll(to4Bytes(height).toList())
// Add complicated stuff like depth color ...
// If you want correct png you need same parameters. Good solution is to create new png.
ihdrBody.addAll(ihdrOfApng.ihdrCorps.copyOfRange(8, 13).toList())
// Generate CRC
val crC32 = CRC32()
crC32.update(ihdrBody.toByteArray(), 0, ihdrBody.size)
ihdr.addAll(ihdrBody)
ihdr.addAll(to4Bytes(crC32.value.toInt()).toList())
return ihdr.toByteArray()
}
if (tnrs != null) {
png.addAll(tnrs.toList())
}
} else {
// Add IEND body length : 0
png.addAll(to4Bytes(0).toList())
private fun parseChunk(byteArray: ByteArray) {
val i = 4
val name = Arrays.toString(byteArray.copyOfRange(i, i +4))
when (name) {
Utils.fcTL -> {
if (png == null) {
cover?.let {
it.addAll(to4Bytes(0).toList())
// Add IEND
val iend = byteArrayOf(0x49, 0x45, 0x4E, 0x44)
// Generate crc for IEND
val crC32 = CRC32()
crC32.update(iend, 0, iend.size)
png.addAll(iend.toList())
png.addAll(to4Bytes(crC32.value.toInt()).toList())
pngList.add(Frame(png.toByteArray(), delay, xOffset, yOffset, maxWidth, maxHeight, blend_op, dispose_op))
png = ArrayList()
val bodySize = {
var lengthString = ""
byteArray.copyOfRange(i - 4, i).forEach {
lengthString += String.format("%02x", it)
}
lengthString.toLong(16).toInt()
}()
val newBytes = byteArray.copyOfRange(i - 4, i + 4 + bodySize)
val fcTL = fcTL(newBytes)
delay = fcTL.delay
yOffset = fcTL.y_offset
xOffset = fcTL.x_offset
blend_op = fcTL.blend_op
dispose_op = fcTL.dispose_op
val width = fcTL.pngWidth
val height = fcTL.pngHeight
png.addAll(pngSignature.toList())
png.addAll(generate_ihdr(ihdr, width, height).toList())
if (plte != null) {
png.addAll(plte.toList())
}
if (tnrs != null) {
png.addAll(tnrs.toList())
}
it.addAll(iend.toList())
it.addAll(to4Bytes(crC32.value.toInt()).toList())
apng.cover = BitmapFactory.decodeByteArray(it.toByteArray(), 0, it.size)
}
} else if (i == byteArray.size - 1) {
png = ArrayList()
val fcTL = fcTL(byteArray)
delay = fcTL.delay
yOffset = fcTL.y_offset
xOffset = fcTL.x_offset
blend_op = fcTL.blend_op
dispose_op = fcTL.dispose_op
val width = fcTL.pngWidth
val height = fcTL.pngHeight
png!!.addAll(pngSignature.toList())
png!!.addAll(generateIhdr(ihdr, width, height).toList())
plte?.let {
png!!.addAll(it.toList())
}
tnrs?.let {
png!!.addAll(it.toList())
}
} else {
// Add IEND body length : 0
png!!.addAll(to4Bytes(0).toList())
// Add IEND
val iend = byteArrayOf(0x49, 0x45, 0x4E, 0x44)
// Generate crc for IEND
val crC32 = CRC32()
crC32.update(iend, 0, iend.size)
png.addAll(iend.toList())
png.addAll(to4Bytes(crC32.value.toInt()).toList())
pngList.add(Frame(png.toByteArray(), delay, xOffset, yOffset, maxWidth, maxHeight, blend_op, dispose_op))
}
// Check if is IDAT
else if (byteArray[i] == 0x49.toByte() && byteArray[i + 1] == 0x44.toByte() && byteArray[i + 2] == 0x41.toByte() && byteArray[i + 3] == 0x54.toByte()) {
if (png == null) {
if (cover == null) {
cover = ArrayList()
cover.addAll(pngSignature.toList())
cover.addAll(generate_ihdr(ihdr, maxWidth, maxHeight).toList())
}
// Find the chunk length
var lengthString = ""
byteArray.copyOfRange(i - 4, i).forEach {
lengthString += String.format("%02x", it)
}
val bodySize = lengthString.toLong(16).toInt()
cover.addAll(byteArray.copyOfRange(i - 4, i).toList())
val body = ArrayList<Byte>()
body.addAll(byteArrayOf(0x49, 0x44, 0x41, 0x54).toList())
// Get image bytes
for (j in i + 4 until i + 4 + bodySize) {
body.add(byteArray[j])
}
val crC32 = CRC32()
crC32.update(body.toByteArray(), 0, body.size)
cover.addAll(body)
cover.addAll(to4Bytes(crC32.value.toInt()).toList())
} else {
// Find the chunk length
var lengthString = ""
byteArray.copyOfRange(i - 4, i).forEach {
lengthString += String.format("%02x", it)
}
val bodySize = lengthString.toLong(16).toInt()
png.addAll(byteArray.copyOfRange(i - 4, i).toList())
val body = ArrayList<Byte>()
body.addAll(byteArrayOf(0x49, 0x44, 0x41, 0x54).toList())
// Get image bytes
for (j in i + 4 until i + 4 + bodySize) {
body.add(byteArray[j])
}
val crC32 = CRC32()
crC32.update(body.toByteArray(), 0, body.size)
png.addAll(body)
png.addAll(to4Bytes(crC32.value.toInt()).toList())
png!!.addAll(iend.toList())
png!!.addAll(to4Bytes(crC32.value.toInt()).toList())
apng.frames.add(Frame(png!!.toByteArray(), delay, xOffset, yOffset, maxWidth, maxHeight, blend_op, dispose_op))
png = ArrayList()
val fcTL = fcTL(byteArray)
delay = fcTL.delay
yOffset = fcTL.y_offset
xOffset = fcTL.x_offset
blend_op = fcTL.blend_op
dispose_op = fcTL.dispose_op
val width = fcTL.pngWidth
val height = fcTL.pngHeight
png!!.addAll(pngSignature.toList())
png!!.addAll(generateIhdr(ihdr, width, height).toList())
plte?.let {
png!!.addAll(it.toList())
}
tnrs?.let {
png!!.addAll(it.toList())
}
}
// Check if is fdAT
else if (byteArray[i] == 0x66.toByte() && byteArray[i + 1] == 0x64.toByte() && byteArray[i + 2] == 0x41.toByte() && byteArray[i + 3] == 0x54.toByte()) {
}
Utils.IEND -> {
png!!.addAll(to4Bytes(0).toList())
// Add IEND
val iend = byteArrayOf(0x49, 0x45, 0x4E, 0x44)
// Generate crc for IEND
val crC32 = CRC32()
crC32.update(iend, 0, iend.size)
png!!.addAll(iend.toList())
png!!.addAll(to4Bytes(crC32.value.toInt()).toList())
apng.frames.add(Frame(png!!.toByteArray(), delay, xOffset, yOffset, maxWidth, maxHeight, blend_op, dispose_op))
}
Utils.IDAT -> {
if (png == null) {
if (cover == null) {
cover = ArrayList()
cover!!.addAll(pngSignature.toList())
cover!!.addAll(generateIhdr(ihdr, maxWidth, maxHeight).toList())
}
// Find the chunk length
var lengthString = ""
byteArray.copyOfRange(i - 4, i).forEach {
lengthString += String.format("%02x", it)
}
val bodySize = lengthString.toLong(16).toInt()
png!!.addAll(to4Bytes(bodySize - 4).toList())
val bodySize = parseLength(byteArray.copyOfRange(i - 4, i))
cover!!.addAll(byteArray.copyOfRange(i - 4, i).toList())
val body = ArrayList<Byte>()
body.addAll(byteArrayOf(0x49, 0x44, 0x41, 0x54).toList())
// Get image bytes
for (j in i + 8 until i + 4 + bodySize) {
body.add(byteArray[j])
}
body.addAll(byteArray.copyOfRange(i + 4,i + 4 + bodySize).toList())
val crC32 = CRC32()
crC32.update(body.toByteArray(), 0, body.size)
png.addAll(body)
png.addAll(to4Bytes(crC32.value.toInt()).toList())
}
// Get plte chunks if exist. The PLTE chunk contains from 1 to 256 palette entries, each a three-byte series of the form:
else if (byteArray[i] == 0x50.toByte() && byteArray[i + 1] == 0x4C.toByte() && byteArray[i + 2] == 0x54.toByte() && byteArray[i + 3] == 0x45.toByte()) {
var lengthString = ""
byteArray.copyOfRange(i - 4, i).forEach {
lengthString += String.format("%02x", it)
}
val bodySize = lengthString.toLong(16).toInt()
plte = byteArray.copyOfRange(i - 4, i + 8 + bodySize)
}
// Get tnrs chunk if exist. Used for transparency
else if (byteArray[i] == 0x74.toByte() && byteArray[i + 1] == 0x52.toByte() && byteArray[i + 2] == 0x4E.toByte() && byteArray[i + 3] == 0x53.toByte()) {
var lengthString = ""
byteArray.copyOfRange(i - 4, i).forEach {
lengthString += String.format("%02x", it)
}
val bodySize = lengthString.toLong(16).toInt()
tnrs = byteArray.copyOfRange(i - 4, i + 8 + bodySize)
cover!!.addAll(body)
cover!!.addAll(to4Bytes(crC32.value.toInt()).toList())
} else {
// Find the chunk length
val bodySize = parseLength(byteArray.copyOfRange(i - 4, i))
png!!.addAll(byteArray.copyOfRange(i - 4, i).toList())
val body = ArrayList<Byte>()
body.addAll(byteArrayOf(0x49, 0x44, 0x41, 0x54).toList())
// Get image bytes
body.addAll(byteArray.copyOfRange(i + 4,i + 4 + bodySize).toList())
val crC32 = CRC32()
crC32.update(body.toByteArray(), 0, body.size)
png!!.addAll(body)
png!!.addAll(to4Bytes(crC32.value.toInt()).toList())
}
}
apng.frames = pngList
return apng
} else {
throw NotApngException()
Utils.fdAT -> {
// Find the chunk length
val bodySize = parseLength(byteArray.copyOfRange(i - 4, i))
png!!.addAll(to4Bytes(bodySize - 4).toList())
val body = ArrayList<Byte>()
body.addAll(byteArrayOf(0x49, 0x44, 0x41, 0x54).toList())
// Get image bytes
body.addAll(byteArray.copyOfRange(i + 8,i + 4 + bodySize).toList())
val crC32 = CRC32()
crC32.update(body.toByteArray(), 0, body.size)
png!!.addAll(body)
png!!.addAll(to4Bytes(crC32.value.toInt()).toList())
}
Utils.plte -> {
plte = byteArray
}
Utils.tnrs -> {
tnrs = byteArray
}
}
}
private fun generate_ihdr(ihdrOfApng: IHDR, width : Int, height : Int) : ByteArray {
val ihdr = ArrayList<Byte>()
// We need a body var to know body length and generate crc
val ihdr_body = ArrayList<Byte>()
// Add chunk body length
ihdr.addAll(to4Bytes(ihdrOfApng.ihdrCorps.size).toList())
// Add IHDR
ihdr_body.addAll(byteArrayOf(0x49.toByte(), 0x48.toByte(), 0x44.toByte(), 0x52.toByte()).toList())
// Add the max width and height
ihdr_body.addAll(to4Bytes(width).toList())
ihdr_body.addAll(to4Bytes(height).toList())
// Add complicated stuff like depth color ...
// If you want correct png you need same parameters. Good solution is to create new png.
ihdr_body.addAll(ihdrOfApng.ihdrCorps.copyOfRange(8, 13).toList())
// Generate CRC
val crC32 = CRC32()
crC32.update(ihdr_body.toByteArray(), 0, ihdr_body.size)
ihdr.addAll(ihdr_body)
ihdr.addAll(to4Bytes(crC32.value.toInt()).toList())
return ihdr.toByteArray()
}
}
}

2
apng_library/src/main/java/oupson/apng/ApngAnimator.kt
View File

@ -150,7 +150,7 @@ class ApngAnimator(private val context: Context) {
this@ApngAnimator.speed = speed
scaleType = apngAnimatorOptions?.scaleType
// Download PNG
snapshotAPNGDisassembler.disassemble(this).frames.apply {
APNGDisassembler.disassemble(this).frames.apply {
draw(this).apply {
setupAnimationDrawableAndStart(this)
}

219
apng_library/src/main/java/oupson/apng/snapshotAPNGDisassembler.kt
View File

@ -1,219 +0,0 @@
package oupson.apng
import android.graphics.BitmapFactory
import android.os.Debug
import android.util.Log
import oupson.apng.chunks.IHDR
import oupson.apng.chunks.fcTL
import oupson.apng.exceptions.NotApngException
import oupson.apng.utils.Utils
import oupson.apng.utils.Utils.Companion.fcTL
import oupson.apng.utils.Utils.Companion.isApng
import oupson.apng.utils.Utils.Companion.pngSignature
import oupson.apng.utils.Utils.Companion.to4Bytes
import java.util.*
import java.util.zip.CRC32
class snapshotAPNGDisassembler {
companion object {
val pngList = ArrayList<Frame>()
var png: ArrayList<Byte>? = null
var cover: ArrayList<Byte>? = null
var delay = -1f
var yOffset = -1
var xOffset = -1
var plte: ByteArray? = null
var tnrs: ByteArray? = null
var maxWidth = 0
var maxHeight = 0
var blend_op: Utils.Companion.blend_op = Utils.Companion.blend_op.APNG_BLEND_OP_SOURCE
var dispose_op: Utils.Companion.dispose_op = Utils.Companion.dispose_op.APNG_DISPOSE_OP_NONE
var apng: Apng = Apng()
val ihdr = IHDR()
fun disassemble(byteArray: ByteArray) : Apng {
if (isApng(byteArray)) {
apng = Apng()
ihdr.parseIHDR(byteArray)
maxWidth = ihdr.pngWidth
maxHeight = ihdr.pngHeight
var cursor = 8
while (cursor < byteArray.size) {
var chunk = byteArray.copyOfRange(cursor, cursor + parseLength(byteArray.copyOfRange(cursor, cursor + 4)) + 12)
parseChunk(chunk)
cursor += parseLength(byteArray.copyOfRange(cursor, cursor + 4)) + 12
}
apng.frames = pngList
return apng
} else {
throw NotApngException()
}
}
private fun parseLength(byteArray: ByteArray) : Int {
var lengthString = ""
byteArray.forEach {
lengthString += String.format("%02x", it)
}
return lengthString.toLong(16).toInt()
}
private fun generate_ihdr(ihdrOfApng: IHDR, width : Int, height : Int) : ByteArray {
val ihdr = ArrayList<Byte>()
// We need a body var to know body length and generate crc
val ihdr_body = ArrayList<Byte>()
// Add chunk body length
ihdr.addAll(to4Bytes(ihdrOfApng.ihdrCorps.size).toList())
// Add IHDR
ihdr_body.addAll(byteArrayOf(0x49.toByte(), 0x48.toByte(), 0x44.toByte(), 0x52.toByte()).toList())
// Add the max width and height
ihdr_body.addAll(to4Bytes(width).toList())
ihdr_body.addAll(to4Bytes(height).toList())
// Add complicated stuff like depth color ...
// If you want correct png you need same parameters. Good solution is to create new png.
ihdr_body.addAll(ihdrOfApng.ihdrCorps.copyOfRange(8, 13).toList())
// Generate CRC
val crC32 = CRC32()
crC32.update(ihdr_body.toByteArray(), 0, ihdr_body.size)
ihdr.addAll(ihdr_body)
ihdr.addAll(to4Bytes(crC32.value.toInt()).toList())
return ihdr.toByteArray()
}
private fun parseChunk(byteArray: ByteArray) {
val i = 4
val name = Arrays.toString(byteArray.copyOfRange(i, i +4))
when (name) {
Utils.fcTL -> {
if (png == null) {
cover?.let {
it.addAll(to4Bytes(0).toList())
// Add IEND
val iend = byteArrayOf(0x49, 0x45, 0x4E, 0x44)
// Generate crc for IEND
val crC32 = CRC32()
crC32.update(iend, 0, iend.size)
it.addAll(iend.toList())
it.addAll(to4Bytes(crC32.value.toInt()).toList())
apng.cover = BitmapFactory.decodeByteArray(it.toByteArray(), 0, it.size)
}
png = ArrayList()
val fcTL = fcTL(byteArray)
delay = fcTL.delay
yOffset = fcTL.y_offset
xOffset = fcTL.x_offset
blend_op = fcTL.blend_op
dispose_op = fcTL.dispose_op
val width = fcTL.pngWidth
val height = fcTL.pngHeight
png!!.addAll(pngSignature.toList())
png!!.addAll(generate_ihdr(ihdr, width, height).toList())
plte?.let {
png!!.addAll(it.toList())
}
tnrs?.let {
png!!.addAll(it.toList())
}
} else {
// Add IEND body length : 0
png!!.addAll(to4Bytes(0).toList())
// Add IEND
val iend = byteArrayOf(0x49, 0x45, 0x4E, 0x44)
// Generate crc for IEND
val crC32 = CRC32()
crC32.update(iend, 0, iend.size)
png!!.addAll(iend.toList())
png!!.addAll(to4Bytes(crC32.value.toInt()).toList())
pngList.add(Frame(png!!.toByteArray(), delay, xOffset, yOffset, maxWidth, maxHeight, blend_op, dispose_op))
png = ArrayList()
val fcTL = fcTL(byteArray)
delay = fcTL.delay
yOffset = fcTL.y_offset
xOffset = fcTL.x_offset
blend_op = fcTL.blend_op
dispose_op = fcTL.dispose_op
val width = fcTL.pngWidth
val height = fcTL.pngHeight
png!!.addAll(pngSignature.toList())
png!!.addAll(generate_ihdr(ihdr, width, height).toList())
plte?.let {
png!!.addAll(it.toList())
}
tnrs?.let {
png!!.addAll(it.toList())
}
}
}
Utils.IEND -> {
png!!.addAll(to4Bytes(0).toList())
// Add IEND
val iend = byteArrayOf(0x49, 0x45, 0x4E, 0x44)
// Generate crc for IEND
val crC32 = CRC32()
crC32.update(iend, 0, iend.size)
png!!.addAll(iend.toList())
png!!.addAll(to4Bytes(crC32.value.toInt()).toList())
pngList.add(Frame(png!!.toByteArray(), delay, xOffset, yOffset, maxWidth, maxHeight, blend_op, dispose_op))
}
Utils.IDAT -> {
if (png == null) {
if (cover == null) {
cover = ArrayList()
cover!!.addAll(pngSignature.toList())
cover!!.addAll(generate_ihdr(ihdr, maxWidth, maxHeight).toList())
}
// Find the chunk length
val bodySize = parseLength(byteArray.copyOfRange(i - 4, i))
cover!!.addAll(byteArray.copyOfRange(i - 4, i).toList())
val body = ArrayList<Byte>()
body.addAll(byteArrayOf(0x49, 0x44, 0x41, 0x54).toList())
// Get image bytes
body.addAll(byteArray.copyOfRange(i + 4,i + 4 + bodySize).toList())
val crC32 = CRC32()
crC32.update(body.toByteArray(), 0, body.size)
cover!!.addAll(body)
cover!!.addAll(to4Bytes(crC32.value.toInt()).toList())
} else {
// Find the chunk length
val bodySize = parseLength(byteArray.copyOfRange(i - 4, i))
png!!.addAll(byteArray.copyOfRange(i - 4, i).toList())
val body = ArrayList<Byte>()
body.addAll(byteArrayOf(0x49, 0x44, 0x41, 0x54).toList())
// Get image bytes
body.addAll(byteArray.copyOfRange(i + 4,i + 4 + bodySize).toList())
val crC32 = CRC32()
crC32.update(body.toByteArray(), 0, body.size)
png!!.addAll(body)
png!!.addAll(to4Bytes(crC32.value.toInt()).toList())
}
}
Utils.fdAT -> {
// Find the chunk length
val bodySize = parseLength(byteArray.copyOfRange(i - 4, i))
png!!.addAll(to4Bytes(bodySize - 4).toList())
val body = ArrayList<Byte>()
body.addAll(byteArrayOf(0x49, 0x44, 0x41, 0x54).toList())
// Get image bytes
body.addAll(byteArray.copyOfRange(i + 8,i + 4 + bodySize).toList())
val crC32 = CRC32()
crC32.update(body.toByteArray(), 0, body.size)
png!!.addAll(body)
png!!.addAll(to4Bytes(crC32.value.toInt()).toList())
}
Utils.plte -> {
plte = byteArray
}
Utils.tnrs -> {
tnrs = byteArray
}
}
}
}
}

6
app-test/src/main/java/oupson/apngcreator/MainActivity.kt
View File

@ -13,9 +13,9 @@ import java.util.*
class MainActivity : AppCompatActivity() {
lateinit var animator: ApngAnimator
val imageUrl = "https://metagif.files.wordpress.com/2015/01/bugbuckbunny.png"
// val imageUrl = "http://orig06.deviantart.net/7812/f/2012/233/7/5/twilight_rapidash_shaded_and_animated_by_tamalesyatole-d5bz7hd.png"
//val imageUrl = "https://raw.githubusercontent.com/tinify/iMessage-Panda-sticker/master/StickerPackExtension/Stickers.xcstickers/Sticker%20Pack.stickerpack/panda.sticker/panda.png"
//val imageUrl = "https://metagif.files.wordpress.com/2015/01/bugbuckbunny.png"
//val imageUrl = "http://orig06.deviantart.net/7812/f/2012/233/7/5/twilight_rapidash_shaded_and_animated_by_tamalesyatole-d5bz7hd.png"
val imageUrl = "https://raw.githubusercontent.com/tinify/iMessage-Panda-sticker/master/StickerPackExtension/Stickers.xcstickers/Sticker%20Pack.stickerpack/panda.sticker/panda.png"
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)