From 38be0d13830efd2d98281c645c3a60afe05ffece Mon Sep 17 00:00:00 2001 From: Qt by Nokia Date: Wed, 27 Apr 2011 12:05:43 +0200 Subject: Initial import from the monolithic Qt. This is the beginning of revision history for this module. If you want to look at revision history older than this, please refer to the Qt Git wiki for how to use Git history grafting. At the time of writing, this wiki is located here: http://qt.gitorious.org/qt/pages/GitIntroductionWithQt If you have already performed the grafting and you don't see any history beyond this commit, try running "git log" with the "--follow" argument. Branched from the monolithic repo, Qt master branch, at commit 896db169ea224deb96c59ce8af800d019de63f12 --- .../libtiff/html/man/TIFFReadRGBATile.3tiff.html | 261 +++++++++++++++++++++ 1 file changed, 261 insertions(+) create mode 100644 src/3rdparty/libtiff/html/man/TIFFReadRGBATile.3tiff.html (limited to 'src/3rdparty/libtiff/html/man/TIFFReadRGBATile.3tiff.html') diff --git a/src/3rdparty/libtiff/html/man/TIFFReadRGBATile.3tiff.html b/src/3rdparty/libtiff/html/man/TIFFReadRGBATile.3tiff.html new file mode 100644 index 0000000000..ed67b83278 --- /dev/null +++ b/src/3rdparty/libtiff/html/man/TIFFReadRGBATile.3tiff.html @@ -0,0 +1,261 @@ + + + + + + +TIFFReadRGBATile + + + +

TIFFReadRGBATile

+NAME
+SYNOPSIS
+DESCRIPTION
+NOTES
+RETURN VALUES
+DIAGNOSTICS
+SEE ALSO
+ +

+ +

NAME

+ + + + + +

TIFFReadRGBATile − read and decode an image tile +into a fixed-format raster

+ +

SYNOPSIS

+ + + + + +

#include <tiffio.h>

+ + + + + + + + + + + + + + + + + + + + + + + + + + +

	+ + #define TIFFGetR(abgr) +			+ + ((abgr) & 0xff) +
	+ + #define TIFFGetG(abgr) +			+ + (((abgr) >> 8) & 0xff) +
	+ + #define TIFFGetB(abgr) +			+ + (((abgr) >> 16) & 0xff) +
	+ + #define TIFFGetA(abgr) +			+ + (((abgr) >> 24) & 0xff) +

+ + + + + +

int TIFFReadRGBATile(TIFF *tif, +uint32 x, uint32 y, uint32 +*raster)

+ +

DESCRIPTION

+ + + + + +

TIFFReadRGBATile reads a single tile of a +tile-based image into memory, storing the result in the user +supplied RGBA raster. The raster is assumed to be an +array of width times length 32-bit entries, where width is +the width of a tile (TIFFTAG_TILEWIDTH) and length is the +height of a tile (TIFFTAG_TILELENGTH).

+ +

The x and y values are the offsets from the +top left corner to the top left corner of the tile to be +read. They must be an exact multiple of the tile width and +length.

+ +

Note that the raster is assume to be organized such that +the pixel at location (x,y) is +raster[y*width+x]; with the +raster origin in the lower-left hand corner of the +tile. That is bottom to top organization. Edge tiles which +partly fall off the image will be filled out with +appropriate zeroed areas.

+ +

Raster pixels are 8-bit packed red, green, blue, alpha +samples. The macros TIFFGetR, TIFFGetG, +TIFFGetB, and TIFFGetA should be used to +access individual samples. Images without Associated Alpha +matting information have a constant Alpha of 1.0 (255).

+ +

See the TIFFRGBAImage(3TIFF) page for more details +on how various image types are converted to RGBA values.

+ +

NOTES

+ + + + + +

Samples must be either 1, 2, 4, 8, or 16 bits. +Colorimetric samples/pixel must be either 1, 3, or 4 (i.e. +SamplesPerPixel minus ExtraSamples).

+ +

Palette image colormaps that appear to be incorrectly +written as 8-bit values are automatically scaled to +16-bits.

+ +

TIFFReadRGBATile is just a wrapper around the more +general TIFFRGBAImage(3TIFF) facilities. It’s +main advantage over the similar TIFFReadRGBAImage() +function is that for large images a single buffer capable of +holding the whole image doesn’t need to be allocated, +only enough for one tile. The TIFFReadRGBAStrip() +function does a similar operation for stripped images.

+ +

RETURN VALUES

+ + + + + +

1 is returned if the image was successfully read and +converted. Otherwise, 0 is returned if an error was +encountered.

+ +

DIAGNOSTICS

+ + + + + +

All error messages are directed to the +TIFFError(3TIFF) routine.

+ +

Sorry, can not handle %d-bit pictures. The image +had BitsPerSample other than 1, 2, 4, 8, or 16.

+ +

Sorry, can not handle %d-channel images. The image +had SamplesPerPixel other than 1, 3, or 4.

+ +

Missing needed "PhotometricInterpretation" +tag. The image did not have a tag that describes how to +display the data.

+ +

No "PhotometricInterpretation" tag, assuming +RGB. The image was missing a tag that describes how to +display it, but because it has 3 or 4 samples/pixel, it is +assumed to be RGB.

+ +

No "PhotometricInterpretation" tag, assuming +min-is-black. The image was missing a tag that describes +how to display it, but because it has 1 sample/pixel, it is +assumed to be a grayscale or bilevel image.

+ +

No space for photometric conversion table. There +was insufficient memory for a table used to convert image +samples to 8-bit RGB.

+ +

Missing required "Colormap" tag. A +Palette image did not have a required Colormap +tag.

+ +

No space for tile buffer. There was insufficient +memory to allocate an i/o buffer.

+ +

No space for strip buffer. There was insufficient +memory to allocate an i/o buffer.

+ +

Can not handle format. The image has a format +(combination of BitsPerSample, +SamplesPerPixel, and +PhotometricInterpretation) that +TIFFReadRGBAImage can not handle.

+ +

No space for B&W mapping table. There was +insufficient memory to allocate a table used to map +grayscale data to RGB.

+ +

No space for Palette mapping table. There was +insufficient memory to allocate a table used to map data to +8-bit RGB.

+ +