LazyPngFile

Lazily reads out basic info from a png (header, palette, image data) It will only allocate memory to read a palette, and only copies on the header and the palette. It ignores everything else.

FIXME: it doesn't handle interlaced files.

struct LazyPngFile (

LazyPngChunksProvider

) if (

isInputRange!(LazyPngChunksProvider) &&

is(ElementType!(LazyPngChunksProvider) == Chunk)

) {

LazyPngChunksProvider chunks;

auto rawDatastreamByChunk(int chunkSize);

PngHeader header;

Color[] palette;

}

Members

Functions

rawDatastreamByChunk auto rawDatastreamByChunk(int chunkSize): Lazily reads and decompresses the image datastream, returning chunkSize bytes of it per front. It does *not* change anything, so the filter byte is still there.