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Split api of inflate 

Added ability to read data chunk wise.
This commit is contained in:
Niko Lehto 2020-02-03 10:19:00 +01:00
parent 3cf11004b4
commit 2cee106eee
2 changed files with 20 additions and 7 deletions
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8
core/decoders/tight.js
View File

@ -160,7 +160,9 @@ export default class TightDecoder {
return false;
}
data = this._zlibs[streamId].inflate(data, uncompressedSize);
this._zlibs[streamId].setInput(data);
data = this._zlibs[streamId].inflate(uncompressedSize);
this._zlibs[streamId].setInput(null);
}
display.blitRgbImage(x, y, width, height, data, 0, false);
@ -205,7 +207,9 @@ export default class TightDecoder {
return false;
}
data = this._zlibs[streamId].inflate(data, uncompressedSize);
this._zlibs[streamId].setInput(data);
data = this._zlibs[streamId].inflate(uncompressedSize);
this._zlibs[streamId].setInput(null);
}
// Convert indexed (palette based) image data to RGB

19
core/inflator.js
View File

@ -19,12 +19,20 @@ export default class Inflate {
inflateInit(this.strm, this.windowBits);
}
inflate(data, expected) {
this.strm.input = data;
this.strm.avail_in = this.strm.input.length;
this.strm.next_in = 0;
this.strm.next_out = 0;
setInput(data) {
if (!data) {
//FIXME: flush remaining data.
this.strm.input = null;
this.strm.avail_in = 0;
this.strm.next_in = 0;
} else {
this.strm.input = data;
this.strm.avail_in = this.strm.input.length;
this.strm.next_in = 0;
}
}
inflate(expected) {
// resize our output buffer if it's too small
// (we could just use multiple chunks, but that would cause an extra
// allocation each time to flatten the chunks)
@ -33,6 +41,7 @@ export default class Inflate {
this.strm.output = new Uint8Array(this.chunkSize);
}
this.strm.next_out = 0;
this.strm.avail_out = this.chunkSize;
let ret = inflate(this.strm, 0); // Flush argument not used.