Mercurial > projects > dwt-mac

comparison dwt/internal/image/PngIendChunk.d @ 34:5123b17c98ef

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Ported dwt.events.*, dwt.graphics.GC, Region, dwt.internal.image.*
author Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
date Sun, 14 Sep 2008 01:45:57 +0200
parents 1a8b3cb347e0
children
comparison
equal deleted inserted replaced
33:965ac0a77267 34:5123b17c98ef
5 * which accompanies this distribution, and is available at 5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html 6 * http://www.eclipse.org/legal/epl-v10.html
7 * 7 *
8 * Contributors: 8 * Contributors:
9 * IBM Corporation - initial API and implementation 9 * IBM Corporation - initial API and implementation
10 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
10 *******************************************************************************/ 12 *******************************************************************************/
11 module dwt.internal.image; 13 module dwt.internal.image.PngIendChunk;
12 14
13 15
14 import dwt.DWT; 16 import dwt.DWT;
17 import dwt.internal.image.PngFileReadState;
18 import dwt.internal.image.PngIhdrChunk;
19 import dwt.internal.image.PngChunk;
15 20
16 class PngIendChunk : PngChunk { 21 class PngIendChunk : PngChunk {
17 22
18 this() { 23 this() {
19 super(0); 24 super(0);
23 28
24 this(byte[] reference){ 29 this(byte[] reference){
25 super(reference); 30 super(reference);
26 } 31 }
27 32
28 int getChunkType() { 33 override int getChunkType() {
29 return CHUNK_IEND; 34 return CHUNK_IEND;
30 } 35 }
31 36
32 /** 37 /**
33 * Answer whether the chunk is a valid IEND chunk. 38 * Answer whether the chunk is a valid IEND chunk.
34 */ 39 */
35 void validate(PngFileReadState readState, PngIhdrChunk headerChunk) { 40 override void validate(PngFileReadState readState, PngIhdrChunk headerChunk) {
36 // An IEND chunk is invalid if no IHDR has been read. 41 // An IEND chunk is invalid if no IHDR has been read.
37 // Or if a palette is required and has not been read. 42 // Or if a palette is required and has not been read.
38 // Or if no IDAT chunk has been read. 43 // Or if no IDAT chunk has been read.
39 if (!readState.readIHDR 44 if (!readState.readIHDR
40 || (headerChunk.getMustHavePalette() && !readState.readPLTE) 45 || (headerChunk.getMustHavePalette() && !readState.readPLTE)
41 || !readState.readIDAT 46 || !readState.readIDAT
42 || readState.readIEND) 47 || readState.readIEND)
43 { 48 {
44 DWT.error(DWT.ERROR_INVALID_IMAGE); 49 DWT.error(DWT.ERROR_INVALID_IMAGE);
45 } else { 50 } else {
46 readState.readIEND = true; 51 readState.readIEND = true;
47 } 52 }
48 53
49 super.validate(readState, headerChunk); 54 super.validate(readState, headerChunk);
50 55
51 // IEND chunks are not allowed to have any data. 56 // IEND chunks are not allowed to have any data.
52 if (getLength() > 0) DWT.error(DWT.ERROR_INVALID_IMAGE); 57 if (getLength() > 0) DWT.error(DWT.ERROR_INVALID_IMAGE);
53 } 58 }
54 59
55 } 60 }