shear.c File Reference

#include "MagickCore/studio.h"
#include "MagickCore/artifact.h"
#include "MagickCore/attribute.h"
#include "MagickCore/blob-private.h"
#include "MagickCore/cache-private.h"
#include "MagickCore/color-private.h"
#include "MagickCore/colorspace-private.h"
#include "MagickCore/composite.h"
#include "MagickCore/composite-private.h"
#include "MagickCore/decorate.h"
#include "MagickCore/distort.h"
#include "MagickCore/draw.h"
#include "MagickCore/exception.h"
#include "MagickCore/exception-private.h"
#include "MagickCore/gem.h"
#include "MagickCore/geometry.h"
#include "MagickCore/image.h"
#include "MagickCore/image-private.h"
#include "MagickCore/memory_.h"
#include "MagickCore/list.h"
#include "MagickCore/monitor.h"
#include "MagickCore/monitor-private.h"
#include "MagickCore/nt-base-private.h"
#include "MagickCore/pixel-accessor.h"
#include "MagickCore/quantum.h"
#include "MagickCore/resource_.h"
#include "MagickCore/shear.h"
#include "MagickCore/statistic.h"
#include "MagickCore/string_.h"
#include "MagickCore/string-private.h"
#include "MagickCore/thread-private.h"
#include "MagickCore/threshold.h"
#include "MagickCore/transform.h"

Include dependency graph for shear.c:

Go to the source code of this file.

Data Structures
struct	_RadonInfo
Defines
#define	RotateImageTag   "Rotate/Image"
#define	XShearImageTag   "XShear/Image"
#define	YShearImageTag   "YShear/Image"
Typedefs
typedef struct _RadonInfo	RadonInfo
Functions
static MagickBooleanType	CropToFitImage (Image **image, const MagickRealType x_shear, const MagickRealType y_shear, const MagickRealType width, const MagickRealType height, const MagickBooleanType rotate, ExceptionInfo *exception)
static RadonInfo *	DestroyRadonInfo (RadonInfo *radon_info)
static MagickBooleanType	ResetRadonCells (RadonInfo *radon_info)
static RadonInfo *	AcquireRadonInfo (const Image *image, const size_t width, const size_t height, ExceptionInfo *exception)
static size_t	MagickMin (const size_t x, const size_t y)
static ssize_t	ReadRadonCell (const RadonInfo *radon_info, const MagickOffsetType offset, const size_t length, unsigned char *buffer)
static ssize_t	WriteRadonCell (const RadonInfo *radon_info, const MagickOffsetType offset, const size_t length, const unsigned char *buffer)
static unsigned short	GetRadonCell (const RadonInfo *radon_info, const ssize_t x, const ssize_t y)
static MagickBooleanType	SetRadonCell (const RadonInfo *radon_info, const ssize_t x, const ssize_t y, const unsigned short value)
static void	RadonProjection (RadonInfo *source_cells, RadonInfo *destination_cells, const ssize_t sign, size_t *projection)
static MagickBooleanType	RadonTransform (const Image *image, const double threshold, size_t *projection, ExceptionInfo *exception)
static void	GetImageBackgroundColor (Image *image, const ssize_t offset, ExceptionInfo *exception)
MagickExport Image *	DeskewImage (const Image *image, const double threshold, ExceptionInfo *exception)
MagickExport Image *	IntegralRotateImage (const Image *image, size_t rotations, ExceptionInfo *exception)
static MagickBooleanType	XShearImage (Image *image, const MagickRealType degrees, const size_t width, const size_t height, const ssize_t x_offset, const ssize_t y_offset, ExceptionInfo *exception)
static MagickBooleanType	YShearImage (Image *image, const MagickRealType degrees, const size_t width, const size_t height, const ssize_t x_offset, const ssize_t y_offset, ExceptionInfo *exception)
MagickExport Image *	ShearImage (const Image *image, const double x_shear, const double y_shear, ExceptionInfo *exception)
MagickExport Image *	ShearRotateImage (const Image *image, const double degrees, ExceptionInfo *exception)

---

Define Documentation

#define RotateImageTag   "Rotate/Image"

Referenced by IntegralRotateImage().

#define XShearImageTag   "XShear/Image"

Referenced by XShearImage().

#define YShearImageTag   "YShear/Image"

Referenced by YShearImage().

---

Typedef Documentation

typedef struct _RadonInfo RadonInfo

---

Function Documentation

static RadonInfo* AcquireRadonInfo	(	const Image *	image,
		const size_t	width,
		const size_t	height,
		ExceptionInfo *	exception
	)		[static]

Definition at line 304 of file shear.c.

References AcquireMagickMemory(), ResetMagickMemory(), _RadonInfo::width, _RadonInfo::height, _RadonInfo::length, _RadonInfo::cells, _RadonInfo::type, MemoryCache, AcquireMagickResource(), AreaResource, MagickFalse, MemoryResource, _RadonInfo::mapped, MagickTrue, MapBlob(), IOMode, RelinquishMagickResource(), _RadonInfo::file, DiskResource, ThrowMagickException(), GetMagickModule, CacheError, _Image::filename, DestroyRadonInfo(), DiskCache, AcquireUniqueFileResource(), _RadonInfo::path, MapResource, ResetRadonCells(), and MapCache.

Referenced by RadonTransform().

static MagickBooleanType CropToFitImage	(	Image **	image,
		const MagickRealType	x_shear,
		const MagickRealType	y_shear,
		const MagickRealType	width,
		const MagickRealType	height,
		const MagickBooleanType	rotate,
		ExceptionInfo *	exception
	)		[static]

Definition at line 111 of file shear.c.

References _PointInfo::x, _PointInfo::y, MagickFalse, _RectangleInfo::x, _RectangleInfo::y, _RectangleInfo::width, _RectangleInfo::height, ParseAbsoluteGeometry(), CropImage(), _Image::page, DestroyImage(), and MagickTrue.

Referenced by ShearImage(), and ShearRotateImage().

MagickExport Image* DeskewImage	(	const Image *	image,
		const double	threshold,
		ExceptionInfo *	exception
	)

Definition at line 818 of file shear.c.

References _Image::columns, AcquireQuantumMemory(), ThrowImageException, ResourceLimitError, RadonTransform(), MagickFalse, RelinquishMagickMemory(), CloneImage(), MagickTrue, SetImageVirtualPixelMethod(), BackgroundVirtualPixelMethod, RadiansToDegrees(), _Image::debug, LogMagickEvent(), TransformEvent, GetMagickModule, _AffineMatrix::sx, DegreesToRadians(), _AffineMatrix::rx, _AffineMatrix::ry, _AffineMatrix::sy, _AffineMatrix::tx, _AffineMatrix::ty, GetImageArtifact(), AffineTransformImage(), DestroyImage(), GetImageBackgroundColor(), StringToLong(), StatisticImage(), MedianStatistic, GetImageBoundingBox(), _RectangleInfo::width, _RectangleInfo::height, _RectangleInfo::x, _RectangleInfo::y, and CropImage().

static RadonInfo* DestroyRadonInfo

(

RadonInfo *

radon_info

)

[static]

Definition at line 235 of file shear.c.

References _RadonInfo::type, MemoryCache, _RadonInfo::mapped, MagickFalse, _RadonInfo::cells, RelinquishMagickMemory(), UnmapBlob(), _RadonInfo::length, RelinquishMagickResource(), MemoryResource, MapCache, MapResource, DiskCache, _RadonInfo::file, RelinquishUniqueFileResource(), _RadonInfo::path, and DiskResource.

Referenced by AcquireRadonInfo(), and RadonTransform().

static void GetImageBackgroundColor	(	Image *	image,
		const ssize_t	offset,
		ExceptionInfo *	exception
	)		[static]

Definition at line 757 of file shear.c.

References GetPixelInfo(), AcquireCacheView(), _Image::rows, GetCacheViewVirtualPixels(), _Image::columns, _PixelInfo::red, QuantumScale, GetPixelRed(), _PixelInfo::green, GetPixelGreen(), _PixelInfo::blue, GetPixelBlue(), GetPixelAlphaTraits(), UpdatePixelTrait, _PixelInfo::alpha, GetPixelAlpha(), GetPixelChannels(), DestroyCacheView(), _Image::background_color, ClampToQuantum(), and QuantumRange.

Referenced by DeskewImage().

static unsigned short GetRadonCell	(	const RadonInfo *	radon_info,
		const ssize_t	x,
		const ssize_t	y
	)		[inline, static]

Definition at line 468 of file shear.c.

References _RadonInfo::height, _RadonInfo::cells, _RadonInfo::length, _RadonInfo::type, DiskCache, and ReadRadonCell().

Referenced by RadonProjection().

MagickExport Image* IntegralRotateImage	(	const Image *	image,
		size_t	rotations,
		ExceptionInfo *	exception
	)

Definition at line 955 of file shear.c.

References _Image::page, CloneImage(), MagickTrue, _Image::rows, _Image::columns, AcquireCacheView(), GetPixelCacheTileSize(), MagickFalse, GetCacheViewVirtualPixels(), QueueCacheViewAuthenticPixels(), GetPixelChannels(), GetPixelMask(), GetPixelChannelMapChannel(), GetPixelChannelMapTraits(), UndefinedPixelTrait, SetPixelChannel(), SyncCacheViewAuthenticPixels(), _Image::progress_monitor, SetImageProgress(), RotateImageTag, Swap, _RectangleInfo::width, _RectangleInfo::height, _RectangleInfo::x, _RectangleInfo::y, DestroyCacheView(), _Image::type, and DestroyImage().

Referenced by RotateImage(), and ShearRotateImage().

static size_t MagickMin	(	const size_t	x,
		const size_t	y
	)		[inline, static]

Definition at line 374 of file shear.c.

Referenced by ReadRadonCell(), and WriteRadonCell().

static void RadonProjection	(	RadonInfo *	source_cells,
		RadonInfo *	destination_cells,
		const ssize_t	sign,
		size_t *	projection
	)		[static]

Definition at line 514 of file shear.c.

References _RadonInfo::width, _RadonInfo::height, GetRadonCell(), and SetRadonCell().

Referenced by RadonTransform().

static MagickBooleanType RadonTransform	(	const Image *	image,
		const double	threshold,
		size_t *	projection,
		ExceptionInfo *	exception
	)		[static]

Definition at line 598 of file shear.c.

References _Image::columns, AcquireRadonInfo(), _Image::rows, DestroyRadonInfo(), MagickFalse, ResetRadonCells(), MagickTrue, AcquireCacheView(), GetCacheViewVirtualPixels(), GetPixelIntensity(), SetRadonCell(), GetPixelChannels(), RadonProjection(), and DestroyCacheView().

Referenced by DeskewImage().

static ssize_t ReadRadonCell	(	const RadonInfo *	radon_info,
		const MagickOffsetType	offset,
		const size_t	length,
		unsigned char *	buffer
	)		[inline, static]

Definition at line 381 of file shear.c.

References _RadonInfo::file, and MagickMin().

Referenced by GetRadonCell().

static MagickBooleanType ResetRadonCells

(

RadonInfo *

radon_info

)

[static]

Definition at line 271 of file shear.c.

References _RadonInfo::type, DiskCache, ResetMagickMemory(), _RadonInfo::cells, _RadonInfo::length, MagickTrue, _RadonInfo::file, _RadonInfo::height, _RadonInfo::width, and MagickFalse.

Referenced by AcquireRadonInfo(), and RadonTransform().

static MagickBooleanType SetRadonCell	(	const RadonInfo *	radon_info,
		const ssize_t	x,
		const ssize_t	y,
		const unsigned short	value
	)		[inline, static]

Definition at line 489 of file shear.c.

References _RadonInfo::height, _RadonInfo::cells, _RadonInfo::length, MagickFalse, _RadonInfo::type, DiskCache, MagickTrue, and WriteRadonCell().

Referenced by RadonProjection(), and RadonTransform().

MagickExport Image* ShearImage	(	const Image *	image,
		const double	x_shear,
		const double	y_shear,
		ExceptionInfo *	exception
	)

Definition at line 1843 of file shear.c.

References _Image::signature, MagickSignature, _Image::debug, MagickFalse, LogMagickEvent(), TraceEvent, GetMagickModule, _Image::filename, _ExceptionInfo::signature, ThrowImageException, ImageError, CloneImage(), MagickTrue, ResourceLimitError, _PointInfo::x, DegreesToRadians(), _PointInfo::y, SetImageStorageClass(), DirectClass, DestroyImage(), _Image::matte, SetImageAlphaChannel(), OpaqueAlphaChannel, _Image::columns, _Image::rows, _Image::border_color, _Image::background_color, _Image::compose, CopyCompositeOp, _RectangleInfo::width, _RectangleInfo::height, BorderImage(), XShearImage(), YShearImage(), CropToFitImage(), and _Image::page.

Referenced by PreviewImage().

MagickExport Image* ShearRotateImage	(	const Image *	image,
		const double	degrees,
		ExceptionInfo *	exception
	)

Definition at line 1983 of file shear.c.

References _Image::signature, MagickSignature, _Image::debug, MagickFalse, LogMagickEvent(), TraceEvent, GetMagickModule, _Image::filename, _ExceptionInfo::signature, IntegralRotateImage(), ThrowImageException, ResourceLimitError, _PointInfo::x, DegreesToRadians(), _PointInfo::y, SetImageStorageClass(), DirectClass, DestroyImage(), _Image::matte, SetImageAlphaChannel(), OpaqueAlphaChannel, _Image::columns, _Image::rows, _Image::border_color, _Image::background_color, _Image::compose, CopyCompositeOp, _RectangleInfo::width, _RectangleInfo::height, BorderImage(), XShearImage(), YShearImage(), CropToFitImage(), MagickTrue, and _Image::page.

static ssize_t WriteRadonCell	(	const RadonInfo *	radon_info,
		const MagickOffsetType	offset,
		const size_t	length,
		const unsigned char *	buffer
	)		[inline, static]

Definition at line 425 of file shear.c.

References _RadonInfo::file, and MagickMin().

Referenced by SetRadonCell().

static MagickBooleanType XShearImage	(	Image *	image,
		const MagickRealType	degrees,
		const size_t	width,
		const size_t	height,
		const ssize_t	x_offset,
		const ssize_t	y_offset,
		ExceptionInfo *	exception
	)		[static]

Definition at line 1408 of file shear.c.

References _Image::signature, MagickSignature, _Image::debug, MagickFalse, LogMagickEvent(), TraceEvent, GetMagickModule, _Image::filename, MagickTrue, _Image::background_color, AcquireCacheView(), GetCacheViewAuthenticPixels(), _Image::columns, GetPixelChannels(), GetPixelInfo(), GetPixelInfoPixel(), CompositePixelInfoAreaBlend(), _PixelInfo::alpha, GetPixelAlpha(), SetPixelInfoPixel(), SyncCacheViewAuthenticPixels(), _Image::progress_monitor, SetImageProgress(), XShearImageTag, and DestroyCacheView().

Referenced by ShearImage(), and ShearRotateImage().

static MagickBooleanType YShearImage	(	Image *	image,
		const MagickRealType	degrees,
		const size_t	width,
		const size_t	height,
		const ssize_t	x_offset,
		const ssize_t	y_offset,
		ExceptionInfo *	exception
	)		[static]

Definition at line 1623 of file shear.c.

References _Image::signature, MagickSignature, _Image::debug, MagickFalse, LogMagickEvent(), TraceEvent, GetMagickModule, _Image::filename, MagickTrue, _Image::background_color, AcquireCacheView(), GetCacheViewAuthenticPixels(), _Image::rows, GetPixelChannels(), GetPixelInfo(), GetPixelInfoPixel(), CompositePixelInfoAreaBlend(), _PixelInfo::alpha, GetPixelAlpha(), SetPixelInfoPixel(), SyncCacheViewAuthenticPixels(), _Image::progress_monitor, SetImageProgress(), YShearImageTag, and DestroyCacheView().

Referenced by ShearImage(), and ShearRotateImage().