77 lines
2.1 KiB
Java
77 lines
2.1 KiB
Java
package ar.com.hjg.pngj.chunks;
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import ar.com.hjg.pngj.ImageInfo;
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import ar.com.hjg.pngj.PngjException;
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/**
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* iCCP chunk.
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* <p>
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* See {@link http://www.w3.org/TR/PNG/#11iCCP}
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*/
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public class PngChunkICCP extends PngChunkSingle {
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public final static String ID = ChunkHelper.iCCP;
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// http://www.w3.org/TR/PNG/#11iCCP
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private String profileName;
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private byte[] compressedProfile; // copmression/decopmresion is done in getter/setter
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public PngChunkICCP(ImageInfo info) {
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super(ID, info);
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}
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@Override
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public ChunkOrderingConstraint getOrderingConstraint() {
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return ChunkOrderingConstraint.BEFORE_PLTE_AND_IDAT;
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}
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@Override
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public ChunkRaw createRawChunk() {
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ChunkRaw c = createEmptyChunk(profileName.length() + compressedProfile.length + 2, true);
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System.arraycopy(ChunkHelper.toBytes(profileName), 0, c.data, 0, profileName.length());
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c.data[profileName.length()] = 0;
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c.data[profileName.length() + 1] = 0;
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System.arraycopy(compressedProfile, 0, c.data, profileName.length() + 2, compressedProfile.length);
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return c;
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}
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@Override
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public void parseFromRaw(ChunkRaw chunk) {
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int pos0 = ChunkHelper.posNullByte(chunk.data);
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profileName = ChunkHelper.toString(chunk.data, 0, pos0);
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int comp = (chunk.data[pos0 + 1] & 0xff);
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if (comp != 0)
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throw new PngjException("bad compression for ChunkTypeICCP");
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int compdatasize = chunk.data.length - (pos0 + 2);
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compressedProfile = new byte[compdatasize];
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System.arraycopy(chunk.data, pos0 + 2, compressedProfile, 0, compdatasize);
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}
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/**
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* The profile should be uncompressed bytes
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*/
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public void setProfileNameAndContent(String name, byte[] profile) {
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profileName = name;
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compressedProfile = ChunkHelper.compressBytes(profile, true);
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}
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public void setProfileNameAndContent(String name, String profile) {
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setProfileNameAndContent(name, ChunkHelper.toBytes(profile));
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}
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public String getProfileName() {
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return profileName;
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}
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/**
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* uncompressed
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**/
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public byte[] getProfile() {
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return ChunkHelper.compressBytes(compressedProfile, false);
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}
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public String getProfileAsString() {
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return ChunkHelper.toString(getProfile());
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}
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}
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