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t3du - New Image nodes: Draw Sub Image and Write Image

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Onek8 2025-05-28 22:30:42 +00:00
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commit 3524676fcc
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leenkx/Sources/iron/format/bmp/Reader.hx Normal file
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/*
* format - Haxe File Formats
*
* BMP File Format
* Copyright (C) 2007-2009 Robert Sköld
*
* Copyright (c) 2009, The Haxe Project Contributors
* All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE HAXE PROJECT CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE HAXE PROJECT CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
package iron.format.bmp;
import iron.format.bmp.Data;
class Reader {
var input : haxe.io.Input;
public function new( i ) {
input = i;
}
/**
* Only supports uncompressed 24bpp bitmaps (the most common format).
*
* The returned bytes in `Data.pixels` will be in BGR order, and with padding (if present).
*
* @see https://msdn.microsoft.com/en-us/library/windows/desktop/dd318229(v=vs.85).aspx
* @see https://en.wikipedia.org/wiki/BMP_file_format#Bitmap_file_header
*/
public function read() : format.bmp.Data {
// Read Header
for (b in ["B".code, "M".code]) {
if (input.readByte() != b) throw "Invalid header";
}
var fileSize = input.readInt32();
input.readInt32(); // Reserved
var offset = input.readInt32();
// Read InfoHeader
var infoHeaderSize = input.readInt32(); // InfoHeader size
if (infoHeaderSize != 40) {
throw 'Info headers with size $infoHeaderSize not supported.';
}
var width = input.readInt32(); // Image width (actual, not padded)
var height = input.readInt32(); // Image height
var numPlanes = input.readInt16(); // Number of planes
var bits = input.readInt16(); // Bits per pixel
var compression = input.readInt32(); // Compression type
var dataLength = input.readInt32(); // Image data size (includes padding!)
input.readInt32(); // Horizontal resolution
input.readInt32(); // Vertical resolution
var colorsUsed = input.readInt32(); // Colors used (0 when uncompressed)
input.readInt32(); // Important colors (0 when uncompressed)
// If there's no compression, the dataLength may be 0
if ( compression == 0 && dataLength == 0 ) dataLength = fileSize - offset;
var bytesRead = 54; // total read above
var colorTable : haxe.io.Bytes = null;
if ( bits <= 8 ) {
if ( colorsUsed == 0 ) {
colorsUsed = Tools.getNumColorsForBitDepth(bits);
}
var colorTableLength = 4 * colorsUsed;
colorTable = haxe.io.Bytes.alloc( colorTableLength );
input.readFullBytes( colorTable, 0, colorTableLength );
bytesRead += colorTableLength;
}
input.read( offset - bytesRead );
var p = haxe.io.Bytes.alloc( dataLength );
// Read Raster Data
var paddedStride = Tools.computePaddedStride(width, bits);
var topToBottom = false;
if ( height < 0 ) { // if bitmap is stored top to bottom
topToBottom = true;
height = -height;
}
input.readFullBytes(p, 0, dataLength);
return {
header: {
width: width,
height: height,
paddedStride: paddedStride,
topToBottom: topToBottom,
bpp: bits,
dataLength: dataLength,
compression: compression
},
pixels: p,
colorTable: colorTable
}
}
}