MagickAverageImages • ClonePixelView • DestroyPixelView • DuplexTransferPixelViewIterator • GetPixelViewException • GetPixelViewHeight • GetPixelViewIterator • GetPixelViewPixels • GetPixelViewWand • GetPixelViewWidth • GetPixelViewX • GetPixelViewY • IsPixelView • MagickClipPathImage • DrawGetFillAlpha • DrawGetStrokeAlpha • DrawPeekGraphicWand • DrawPopGraphicContext • DrawPushGraphicContext • DrawSetFillAlpha • DrawSetStrokeAlpha • MagickColorFloodfillImage • MagickDescribeImage • MagickFlattenImages • MagickGetImageAttribute • MagickGetImageMatte • MagickGetImagePixels • MagickGetImageSize • MagickMapImage • MagickMatteFloodfillImage • MagickMedianFilterImage • MagickMinimumImages • MagickModeImage • MagickMosaicImages • MagickOpaqueImage • MagickPaintFloodfillImage • MagickPaintOpaqueImage • MagickPaintTransparentImage • MagickRadialBlurImage • MagickRecolorImage • MagickReduceNoiseImage • MagickMaximumImages • MagickSetImageAttribute • MagickSetImageIndex • MagickTransparentImage • MagickRegionOfInterestImage • MagickSetImagePixels • MagickWriteImageBlob • NewPixelView • NewPixelViewRegion • PixelGetNextRow • PixelIteratorGetException • SetPixelViewIterator • TransferPixelViewIterator • UpdatePixelViewIterator
MagickAverageImages() average a set of images.
The format of the MagickAverageImages method is:
MagickWand *MagickAverageImages(MagickWand *wand)
A description of each parameter follows:
ClonePixelView() makes a copy of the specified pixel view.
The format of the ClonePixelView method is:
PixelView *ClonePixelView(const PixelView *pixel_view)
A description of each parameter follows:
DestroyPixelView() deallocates memory associated with a pixel view.
The format of the DestroyPixelView method is:
PixelView *DestroyPixelView(PixelView *pixel_view, const size_t number_wands,const size_t number_threads)
A description of each parameter follows:
DuplexTransferPixelViewIterator() iterates over three pixel views in parallel and calls your transfer method for each scanline of the view. The source and duplex pixel region is not confined to the image canvas-- that is you can include negative offsets or widths or heights that exceed the image dimension. However, the destination pixel view is confined to the image canvas-- that is no negative offsets or widths or heights that exceed the image dimension are permitted.
Use this pragma:
#pragma omp critical
to define a section of code in your callback transfer method that must be executed by a single thread at a time.
The format of the DuplexTransferPixelViewIterator method is:
MagickBooleanType DuplexTransferPixelViewIterator(PixelView *source, PixelView *duplex,PixelView *destination, DuplexTransferPixelViewMethod transfer,void *context)
A description of each parameter follows:
GetPixelViewException() returns the severity, reason, and description of any error that occurs when utilizing a pixel view.
The format of the GetPixelViewException method is:
char *GetPixelViewException(const PixelWand *pixel_view, ExceptionType *severity)
A description of each parameter follows:
GetPixelViewHeight() returns the pixel view height.
The format of the GetPixelViewHeight method is:
size_t GetPixelViewHeight(const PixelView *pixel_view)
A description of each parameter follows:
GetPixelViewIterator() iterates over the pixel view in parallel and calls your get method for each scanline of the view. The pixel region is not confined to the image canvas-- that is you can include negative offsets or widths or heights that exceed the image dimension. Any updates to the pixels in your callback are ignored.
Use this pragma:
#pragma omp critical
to define a section of code in your callback get method that must be executed by a single thread at a time.
The format of the GetPixelViewIterator method is:
MagickBooleanType GetPixelViewIterator(PixelView *source, GetPixelViewMethod get,void *context)
A description of each parameter follows:
GetPixelViewPixels() returns the pixel view pixel_wands.
The format of the GetPixelViewPixels method is:
PixelWand *GetPixelViewPixels(const PixelView *pixel_view)
A description of each parameter follows:
GetPixelViewWand() returns the magick wand associated with the pixel view.
The format of the GetPixelViewWand method is:
MagickWand *GetPixelViewWand(const PixelView *pixel_view)
A description of each parameter follows:
GetPixelViewWidth() returns the pixel view width.
The format of the GetPixelViewWidth method is:
size_t GetPixelViewWidth(const PixelView *pixel_view)
A description of each parameter follows:
GetPixelViewX() returns the pixel view x offset.
The format of the GetPixelViewX method is:
ssize_t GetPixelViewX(const PixelView *pixel_view)
A description of each parameter follows:
GetPixelViewY() returns the pixel view y offset.
The format of the GetPixelViewY method is:
ssize_t GetPixelViewY(const PixelView *pixel_view)
A description of each parameter follows:
IsPixelView() returns MagickTrue if the parameter is verified as a pixel view container.
The format of the IsPixelView method is:
MagickBooleanType IsPixelView(const PixelView *pixel_view)
A description of each parameter follows:
MagickClipPathImage() clips along the named paths from the 8BIM profile, if present. Later operations take effect inside the path. Id may be a number if preceded with #, to work on a numbered path, e.g., "#1" to use the first path.
The format of the MagickClipPathImage method is:
MagickBooleanType MagickClipPathImage(MagickWand *wand, const char *pathname,const MagickBooleanType inside)
A description of each parameter follows:
DrawGetFillAlpha() returns the alpha used when drawing using the fill color or fill texture. Fully opaque is 1.0.
The format of the DrawGetFillAlpha method is:
double DrawGetFillAlpha(const DrawingWand *wand)
A description of each parameter follows:
DrawGetStrokeAlpha() returns the alpha of stroked object outlines.
The format of the DrawGetStrokeAlpha method is:
double DrawGetStrokeAlpha(const DrawingWand *wand)
A description of each parameter follows:
DrawPeekGraphicWand() returns the current drawing wand.
The format of the PeekDrawingWand method is:
DrawInfo *DrawPeekGraphicWand(const DrawingWand *wand)
A description of each parameter follows:
DrawPopGraphicContext() destroys the current drawing wand and returns to the previously pushed drawing wand. Multiple drawing wands may exist. It is an error to attempt to pop more drawing wands than have been pushed, and it is proper form to pop all drawing wands which have been pushed.
The format of the DrawPopGraphicContext method is:
MagickBooleanType DrawPopGraphicContext(DrawingWand *wand)
A description of each parameter follows:
DrawPushGraphicContext() clones the current drawing wand to create a new drawing wand. The original drawing wand(s) may be returned to by invoking PopDrawingWand(). The drawing wands are stored on a drawing wand stack. For every Pop there must have already been an equivalent Push.
The format of the DrawPushGraphicContext method is:
MagickBooleanType DrawPushGraphicContext(DrawingWand *wand)
A description of each parameter follows:
DrawSetFillAlpha() sets the alpha to use when drawing using the fill color or fill texture. Fully opaque is 1.0.
The format of the DrawSetFillAlpha method is:
void DrawSetFillAlpha(DrawingWand *wand,const double fill_alpha)
A description of each parameter follows:
DrawSetStrokeAlpha() specifies the alpha of stroked object outlines.
The format of the DrawSetStrokeAlpha method is:
void DrawSetStrokeAlpha(DrawingWand *wand,const double stroke_alpha)
A description of each parameter follows:
MagickColorFloodfillImage() changes the color value of any pixel that matches target and is an immediate neighbor. If the method FillToBorderMethod is specified, the color value is changed for any neighbor pixel that does not match the bordercolor member of image.
The format of the MagickColorFloodfillImage method is:
MagickBooleanType MagickColorFloodfillImage(MagickWand *wand, const PixelWand *fill,const double fuzz,const PixelWand *bordercolor, const ssize_t x,const ssize_t y)
A description of each parameter follows:
MagickDescribeImage() identifies an image by printing its attributes to the file. Attributes include the image width, height, size, and others.
The format of the MagickDescribeImage method is:
const char *MagickDescribeImage(MagickWand *wand)
A description of each parameter follows:
MagickFlattenImages() merges a sequence of images. This useful for combining Photoshop layers into a single image.
The format of the MagickFlattenImages method is:
MagickWand *MagickFlattenImages(MagickWand *wand)
A description of each parameter follows:
MagickGetImageAttribute() returns a value associated with the specified property. Use MagickRelinquishMemory() to free the value when you are finished with it.
The format of the MagickGetImageAttribute method is:
char *MagickGetImageAttribute(MagickWand *wand,const char *property)
A description of each parameter follows:
MagickGetImageMatte() returns MagickTrue if the image has a matte channel otherwise MagickFalse.
The format of the MagickGetImageMatte method is:
size_t MagickGetImageMatte(MagickWand *wand)
A description of each parameter follows:
MagickGetImagePixels() extracts pixel data from an image and returns it to you. The method returns MagickTrue on success otherwise MagickFalse if an error is encountered. The data is returned as char, short int, int, ssize_t, float, or double in the order specified by map.
Suppose you want to extract the first scanline of a 640x480 image as character data in red-green-blue order:
MagickGetImagePixels(wand,0,0,640,1,"RGB",CharPixel,pixels);
The format of the MagickGetImagePixels method is:
MagickBooleanType MagickGetImagePixels(MagickWand *wand, const ssize_t x,const ssize_t y,const size_t columns, const size_t rows,const char *map,const StorageType storage, void *pixels)
A description of each parameter follows:
MagickGetImageSize() returns the image length in bytes.
The format of the MagickGetImageSize method is:
MagickBooleanType MagickGetImageSize(MagickWand *wand, MagickSizeType *length)
A description of each parameter follows:
MagickMapImage() replaces the colors of an image with the closest color from a reference image.
The format of the MagickMapImage method is:
MagickBooleanType MagickMapImage(MagickWand *wand, const MagickWand *map_wand,const MagickBooleanType dither)
A description of each parameter follows:
MagickMatteFloodfillImage() changes the transparency value of any pixel that matches target and is an immediate neighbor. If the method FillToBorderMethod is specified, the transparency value is changed for any neighbor pixel that does not match the bordercolor member of image.
The format of the MagickMatteFloodfillImage method is:
MagickBooleanType MagickMatteFloodfillImage(MagickWand *wand, const double alpha,const double fuzz,const PixelWand *bordercolor, const ssize_t x,const ssize_t y)
A description of each parameter follows:
MagickMedianFilterImage() applies a digital filter that improves the quality of a noisy image. Each pixel is replaced by the median in a set of neighboring pixels as defined by radius.
The format of the MagickMedianFilterImage method is:
MagickBooleanType MagickMedianFilterImage(MagickWand *wand, const double radius)
A description of each parameter follows:
MagickMinimumImages() returns the minimum intensity of an image sequence.
The format of the MagickMinimumImages method is:
MagickWand *MagickMinimumImages(MagickWand *wand)
A description of each parameter follows:
MagickModeImage() makes each pixel the 'predominant color' of the neighborhood of the specified radius.
The format of the MagickModeImage method is:
MagickBooleanType MagickModeImage(MagickWand *wand, const double radius)
A description of each parameter follows:
MagickMosaicImages() inlays an image sequence to form a single coherent picture. It returns a wand with each image in the sequence composited at the location defined by the page offset of the image.
The format of the MagickMosaicImages method is:
MagickWand *MagickMosaicImages(MagickWand *wand)
A description of each parameter follows:
MagickOpaqueImage() changes any pixel that matches color with the color defined by fill.
The format of the MagickOpaqueImage method is:
MagickBooleanType MagickOpaqueImage(MagickWand *wand, const PixelWand *target,const PixelWand *fill,const double fuzz)
A description of each parameter follows:
MagickPaintFloodfillImage() changes the color value of any pixel that matches target and is an immediate neighbor. If the method FillToBorderMethod is specified, the color value is changed for any neighbor pixel that does not match the bordercolor member of image.
The format of the MagickPaintFloodfillImage method is:
MagickBooleanType MagickPaintFloodfillImage(MagickWand *wand, const ChannelType channel,const PixelWand *fill,const double fuzz, const PixelWand *bordercolor,const ssize_t x,const ssize_t y)
A description of each parameter follows:
MagickPaintOpaqueImage() changes any pixel that matches color with the color defined by fill.
The format of the MagickPaintOpaqueImage method is:
MagickBooleanType MagickPaintOpaqueImage(MagickWand *wand, const PixelWand *target,const PixelWand *fill,const double fuzz) MagickBooleanType MagickPaintOpaqueImageChannel(MagickWand *wand, const ChannelType channel,const PixelWand *target, const PixelWand *fill,const double fuzz)
A description of each parameter follows:
MagickPaintTransparentImage() changes any pixel that matches color with the color defined by fill.
The format of the MagickPaintTransparentImage method is:
MagickBooleanType MagickPaintTransparentImage(MagickWand *wand, const PixelWand *target,const double alpha,const double fuzz)
A description of each parameter follows:
MagickRadialBlurImage() radial blurs an image.
The format of the MagickRadialBlurImage method is:
MagickBooleanType MagickRadialBlurImage(MagickWand *wand, const double angle) MagickBooleanType MagickRadialBlurImageChannel(MagickWand *wand, const ChannelType channel,const double angle)
A description of each parameter follows:
MagickRecolorImage() apply color transformation to an image. The method permits saturation changes, hue rotation, luminance to alpha, and various other effects. Although variable-sized transformation matrices can be used, typically one uses a 5x5 matrix for an RGBA image and a 6x6 for CMYKA (or RGBA with offsets). The matrix is similar to those used by Adobe Flash except offsets are in column 6 rather than 5 (in support of CMYKA images) and offsets are normalized (divide Flash offset by 255).
The format of the MagickRecolorImage method is:
MagickBooleanType MagickRecolorImage(MagickWand *wand, const size_t order,const double *color_matrix)
A description of each parameter follows:
MagickReduceNoiseImage() smooths the contours of an image while still preserving edge information. The algorithm works by replacing each pixel with its neighbor closest in value. A neighbor is defined by radius. Use a radius of 0 and ReduceNoise() selects a suitable radius for you.
The format of the MagickReduceNoiseImage method is:
MagickBooleanType MagickReduceNoiseImage(MagickWand *wand, const double radius)
A description of each parameter follows:
MagickMaximumImages() returns the maximum intensity of an image sequence.
The format of the MagickMaximumImages method is:
MagickWand *MagickMaximumImages(MagickWand *wand)
A description of each parameter follows:
MagickSetImageAttribute() associates a property with an image.
The format of the MagickSetImageAttribute method is:
MagickBooleanType MagickSetImageAttribute(MagickWand *wand, const char *property,const char *value)
A description of each parameter follows:
MagickSetImageIndex() set the current image to the position of the list specified with the index parameter.
The format of the MagickSetImageIndex method is:
MagickBooleanType MagickSetImageIndex(MagickWand *wand, const ssize_t index)
A description of each parameter follows:
MagickTransparentImage() changes any pixel that matches color with the color defined by fill.
The format of the MagickTransparentImage method is:
MagickBooleanType MagickTransparentImage(MagickWand *wand, const PixelWand *target,const double alpha,const double fuzz)
A description of each parameter follows:
MagickRegionOfInterestImage() extracts a region of the image and returns it as a new wand.
The format of the MagickRegionOfInterestImage method is:
MagickWand *MagickRegionOfInterestImage(MagickWand *wand, const size_t width,const size_t height,const ssize_t x, const ssize_t y)
A description of each parameter follows:
MagickSetImagePixels() accepts pixel datand stores it in the image at the location you specify. The method returns MagickFalse on success otherwise MagickTrue if an error is encountered. The pixel data can be either char, short int, int, ssize_t, float, or double in the order specified by map.
Suppose your want to upload the first scanline of a 640x480 image from character data in red-green-blue order:
MagickSetImagePixels(wand,0,0,640,1,"RGB",CharPixel,pixels);
The format of the MagickSetImagePixels method is:
MagickBooleanType MagickSetImagePixels(MagickWand *wand, const ssize_t x,const ssize_t y,const size_t columns, const size_t rows,const char *map,const StorageType storage, const void *pixels)
A description of each parameter follows:
MagickWriteImageBlob() implements direct to memory image formats. It returns the image as a blob and its length. Use MagickSetFormat() to set the format of the returned blob (GIF, JPEG, PNG, etc.).
Use MagickRelinquishMemory() to free the blob when you are done with it.
The format of the MagickWriteImageBlob method is:
unsigned char *MagickWriteImageBlob(MagickWand *wand,size_t *length)
A description of each parameter follows:
NewPixelView() returns a pixel view required for all other methods in the Pixel View API.
The format of the NewPixelView method is:
PixelView *NewPixelView(MagickWand *wand)
A description of each parameter follows:
NewPixelViewRegion() returns a pixel view required for all other methods in the Pixel View API.
The format of the NewPixelViewRegion method is:
PixelView *NewPixelViewRegion(MagickWand *wand,const ssize_t x, const ssize_t y,const size_t width,const size_t height)
A description of each parameter follows:
PixelGetNextRow() returns the next row as an array of pixel wands from the pixel iterator.
The format of the PixelGetNextRow method is:
PixelWand **PixelGetNextRow(PixelIterator *iterator, size_t *number_wands)
A description of each parameter follows:
PixelIteratorGetException() returns the severity, reason, and description of any error that occurs when using other methods in this API.
The format of the PixelIteratorGetException method is:
char *PixelIteratorGetException(const Pixeliterator *iterator, ExceptionType *severity)
A description of each parameter follows:
SetPixelViewIterator() iterates over the pixel view in parallel and calls your set method for each scanline of the view. The pixel region is confined to the image canvas-- that is no negative offsets or widths or heights that exceed the image dimension. The pixels are initiallly undefined and any settings you make in the callback method are automagically synced back to your image.
Use this pragma:
#pragma omp critical
to define a section of code in your callback set method that must be executed by a single thread at a time.
The format of the SetPixelViewIterator method is:
MagickBooleanType SetPixelViewIterator(PixelView *destination, SetPixelViewMethod set,void *context)
A description of each parameter follows:
TransferPixelViewIterator() iterates over two pixel views in parallel and calls your transfer method for each scanline of the view. The source pixel region is not confined to the image canvas-- that is you can include negative offsets or widths or heights that exceed the image dimension. However, the destination pixel view is confined to the image canvas-- that is no negative offsets or widths or heights that exceed the image dimension are permitted.
Use this pragma:
#pragma omp critical
to define a section of code in your callback transfer method that must be executed by a single thread at a time.
The format of the TransferPixelViewIterator method is:
MagickBooleanType TransferPixelViewIterator(PixelView *source, PixelView *destination,TransferPixelViewMethod transfer,void *context)
A description of each parameter follows:
UpdatePixelViewIterator() iterates over the pixel view in parallel and calls your update method for each scanline of the view. The pixel region is confined to the image canvas-- that is no negative offsets or widths or heights that exceed the image dimension are permitted. Updates to pixels in your callback are automagically synced back to the image.
Use this pragma:
#pragma omp critical
to define a section of code in your callback update method that must be executed by a single thread at a time.
The format of the UpdatePixelViewIterator method is:
MagickBooleanType UpdatePixelViewIterator(PixelView *source, UpdatePixelViewMethod update,void *context)
A description of each parameter follows: