Palm bitmap - Revision history

Dexvertbot: /* Sample files */

2023-12-28T03:22:05Z

‎Sample files

Dexvertbot: Undo revision 46798 by Dexvertbot (talk)

2023-12-28T03:04:48Z

Undo revision 46798 by Dexvertbot (talk)

Dexvertbot: Change telparia.com samples link to template

2023-12-28T02:57:57Z

Change telparia.com samples link to template

Sembiance: /* Sample files */

2022-03-14T04:07:55Z

‎Sample files

Jsummers: /* Color table */

2019-05-13T16:25:02Z

‎Color table

Jsummers: /* Color table */

2019-05-13T16:22:12Z

‎Color table

Jsummers: /* Software */

2018-02-03T17:38:00Z

‎Software

Jsummers: /* Color table */

2017-10-30T14:17:18Z

‎Color table

Jsummers at 14:01, 20 October 2017

2017-10-20T14:01:57Z

Jsummers: /* Format details */

2017-10-20T14:01:28Z

‎Format details

@@ Line 70: / Line 70: @@
 == Sample files ==
 Many [[PRC (Palm OS)#Sample files|PRC]] files contain embedded Palm bitmaps.
-* https://telparia.com/fileFormatSamples/image/palmBitmap/
+* {{DexvertSamples|image/palmBitmap}}
 [[Category:Palm]]
 [[Category:Resources]]

@@ Line 20: / Line 20: @@
 ! Offs. !! BitmapTypeV0 !! BitmapTypeV1 !! BitmapTypeV2 !! BitmapTypeV3
 |-
-|0 || width
+|0 || width&lt;Int16> || same || same || same

@@ Line 20: / Line 20: @@
 ! Offs. !! BitmapTypeV0 !! BitmapTypeV1 !! BitmapTypeV2 !! BitmapTypeV3
 |-
-|0 || width&lt;Int16> || same || same || same
+|0 || width
-|-
-|2 || height&lt;Int16> || same || same || same
-|-
-|4 || rowBytes&lt;UInt16> || same || same || same
-|-
-|6 || flags&lt;BitmapFlagsType><br>valid flags: compressed [unset=uncompressed, set=ScanLine]
-| flags&lt;BitmapFlagsType><br>valid flags: compressed [unset=uncompressed, set=ScanLine], hasColorTable
-| flags&lt;BitmapFlagsType><br>valid flags: compressed [unset=uncompressed, set=use compressionType field], hasColorTable, hasTransparency, directColor
-| flags&lt;BitmapFlagsType><br>valid flags: compressed [unset=uncompressed, set=use compressionType field], hasColorTable, hasTransparency, directColor, noDither
-|-
-|8 || reserved || pixelSize<br>valid values: 1, 2, 4, 8(?)<br>(The documentation doesn't list 8, but such images exist.) || pixelSize<br>valid values: 1, 2, 4, 8, 16 || pixelSize<br>valid values: 1, 2, 4, 8, 16<br>(The documentation doesn't list 16, but that looks like a clerical error.)
-|-
-|9 || reserved<br>=0 || version<br>=1 || version<br>=2 || version<br>=3
-|-
-|10 ||rowspan="2"| reserved ||rowspan="2"| nextDepthOffset&lt;UInt16><br>(in 4-byte units) ||rowspan="2"| same || size (header size)
-|-
-|11 || pixelFormat&lt;PixelFormatType><br>0=Indexed, 1=565, 2=565LE, 3=IndexedLE
-|-
-|12 ||rowspan="2"| reserved ||rowspan="2"| reserved || transparentIndex || unused
-|-
-|13 || compressionType&lt;BitmapCompressionType><br>0=ScanLine, 1=RLE, 2=PackBits, 255=None || same
-|-
-|14 || reserved || reserved || reserved || density&lt;DensityType><br>72=kDensityLow, 108=kDensityOneAndAHalf, ...
-|-
-|16 || (end of header) || (end of header) || (end of header) || transparentValue&lt;UInt32>
-|-
-|20 ||rowspan="2"| ||rowspan="2"| ||rowspan="2"| || nextBitmapOffset&lt;UInt32><br>(in bytes)
-|-
-|24 || (additional fields could exist here)
-|}
-−
-=== Color table ===
-Images with ≤ 8 bits/pixel may, or may not, use a custom color table (palette) contained in the file.
-−
-Some educated guesses about color tables: If there is no custom color table (i.e. if the hasColorTable flag is not set, or the number of colors in the color table is 0), then images with ≤ 4 bits/pixel are grayscale, and 8-bit images use a standard color table. The standard color table may be found in the source code of programs that support this format.
-−
-The color table begins with a "numEntries" field, about which the documentation says "high bits (numEntries &gt; 256) reserved." Images with numEntries=4096 have been observed, which actually have 256 entries.
-−
-== Specifications ==
-* [https://stuff.mit.edu/afs/sipb/user/yonah/docs/Palm%20OS%20Reference.pdf Palm OS Reference] - See "BitmapType" and "BitmapTypeV..." sections starting on p. 518
-* [http://www.trantor.de/kawt/doc/palmimages.html Palm Native Image Format]
-−
-== Software ==
-* [[Netpbm]]: pnmtopalm, palmtopnm
-* [[ImageMagick]] (format named "PALM")
-* {{Deark}}
-−
-== Sample files ==
-Many [[PRC (Palm OS)#Sample files|PRC]] files contain embedded Palm bitmaps.
-* https://telparia.com/fileFormatSamples/image/palmBitmap/
-−
-[[Category:Palm]]
-[[Category:Resources]]

@@ Line 70: / Line 70: @@
 == Sample files ==
 Many [[PRC (Palm OS)#Sample files|PRC]] files contain embedded Palm bitmaps.
 [[Category:Palm]]
 [[Category:Resources]]

@@ Line 57: / Line 57: @@
 Some educated guesses about color tables: If there is no custom color table (i.e. if the hasColorTable flag is not set, or the number of colors in the color table is 0), then images with ≤ 4 bits/pixel are grayscale, and 8-bit images use a standard color table. The standard color table may be found in the source code of programs that support this format.
-The color table begins with a "numEntries" entries field, about which the documentation says "high bits (numEntries &gt; 256) reserved." Images with numEntries=4096 have been observed, which actually have 256 entries.
+The color table begins with a "numEntries" field, about which the documentation says "high bits (numEntries &gt; 256) reserved." Images with numEntries=4096 have been observed, which actually have 256 entries.
 == Specifications ==

← Older revision		Revision as of 16:22, 13 May 2019
Line 56:		Line 56:

	Some educated guesses about color tables: If there is no custom color table (i.e. if the hasColorTable flag is not set, or the number of colors in the color table is 0), then images with ≤ 4 bits/pixel are grayscale, and 8-bit images use a standard color table. The standard color table may be found in the source code of programs that support this format.		Some educated guesses about color tables: If there is no custom color table (i.e. if the hasColorTable flag is not set, or the number of colors in the color table is 0), then images with ≤ 4 bits/pixel are grayscale, and 8-bit images use a standard color table. The standard color table may be found in the source code of programs that support this format.
		+
		+	The color table begins with a "numEntries" entries field, about which the documentation says "high bits (numEntries > 256) reserved." Images with numEntries=4096 have been observed, which actually have 256 entries.

	== Specifications ==		== Specifications ==