/** \file * \brief Image Manipulation * * See Copyright Notice in im_lib.h */ #ifndef __IM_IMAGE_H #define __IM_IMAGE_H #if defined(__cplusplus) extern "C" { #endif /** \defgroup imgclass imImage * * \par * Base definitions and functions for image representation. \n * Only the image processing operations depends on these definitions, * Image Storage and Image Capture are completely independent. * \par * You can also initialize a structure with your own memory buffer, see \ref imImageInit. * To release the structure without releasing the buffer, * set "data[0]" to NULL before calling imImageDestroy. * \par * See \ref im_image.h * \ingroup imagerep */ /** \brief imImage Structure Definition. * * \par * An image representation than supports all the color spaces, * but planes are always unpacked and the orientation is always bottom up. * \ingroup imgclass */ typedef struct _imImage { /* main parameters */ int width; /**< Number of columns. image:Width() -> width: number [in Lua 5]. */ int height; /**< Number of lines. image:Height() -> height: number [in Lua 5]. */ int color_space; /**< Color space descriptor. See also \ref imColorSpace. image:ColorSpace() -> color_space: number [in Lua 5]. */ int data_type; /**< Data type descriptor. See also \ref imDataType. image:DataType() -> data_type: number [in Lua 5]. */ int has_alpha; /**< Indicates that there is an extra channel with alpha. image:HasAlpha() -> has_alpha: number [in Lua 5]. \n It will not affect the secondary parameters, i.e. the number of planes will be in fact depth+1. \n It is always 0 unless imImageAddAlpha is called, this is done in image load functions. */ /* secondary parameters */ int depth; /**< Number of planes (ColorSpaceDepth) */ int line_size; /**< Number of bytes per line in one plane (width * DataTypeSize) */ int plane_size; /**< Number of bytes per plane. (line_size * height) */ int size; /**< Number of bytes occupied by the image (plane_size * depth) */ int count; /**< Number of pixels (width * height) */ /* image data */ void** data; /**< Image data organized as a 2D matrix with several planes. \n But plane 0 is also a pointer to the full data. \n The remaining planes are: data[i] = data[0] + i*plane_size \n In Lua, data indexing is possible using: image[plane][row][column] */ /* image attributes */ long *palette; /**< Color palette. image:GetPalette() -> palette: imPalette [in Lua 5]. \n Used when depth=1. Otherwise is NULL. */ int palette_count; /**< The palette is always 256 colors allocated, but can have less colors used. */ void* attrib_table; /**< in fact is an imAttribTable, but we hide this here */ } imImage; /** Creates a new image. * See also \ref imDataType and \ref imColorSpace. Image data is cleared as \ref imImageClear. \n * In Lua the IM image metatable name is "imImage". * When converted to a string will return "imImage(%p) [width=%d,height=%d,color_space=%s,data_type=%s,depth=%d]" where %p is replaced by the userdata address, * and other values are replaced by the respective attributes. * If the image is already destroyed by im.ImageDestroy, then it will return also the suffix "-destroyed". * * \verbatim im.ImageCreate(width: number, height: number, color_space: number, data_type: number) -> image: imImage [in Lua 5] \endverbatim * \ingroup imgclass */ imImage* imImageCreate(int width, int height, int color_space, int data_type); /** Initializes the image structure but does not allocates image data. * See also \ref imDataType and \ref imColorSpace. * \ingroup imgclass */ imImage* imImageInit(int width, int height, int color_space, int data_type, void* data_buffer, long* palette, int palette_count); /** Creates a new image based on an existing one. \n * If the addicional parameters are -1, the given image parameters are used. \n * The image atributes always are copied. HasAlpha is copied. * See also \ref imDataType and \ref imColorSpace. * * \verbatim im.ImageCreateBased(image: imImage, [width: number], [height: number], [color_space: number], [data_type: number]) -> image: imImage [in Lua 5] \endverbatim * The addicional parameters in Lua can be nil, * and they can also be functions with the based image as a parameter to return the respective value. * \ingroup imgclass */ imImage* imImageCreateBased(const imImage* image, int width, int height, int color_space, int data_type); /** Destroys the image and frees the memory used. * image data is destroyed only if its data[0] is not NULL. \n * In Lua if this function is not called, the image is destroyed by the garbage collector. * * \verbatim im.ImageDestroy(image: imImage) [in Lua 5] \endverbatim * \verbatim image:Destroy() [in Lua 5] \endverbatim * \ingroup imgclass */ void imImageDestroy(imImage* image); /** Adds an alpha channel plane. * * \verbatim image:AddAlpha() [in Lua 5] \endverbatim * \ingroup imgclass */ void imImageAddAlpha(imImage* image); /** Changes the buffer size. Reallocate internal buffers if the new size is larger than the original. * * \verbatim image:Reshape(width: number, height: number) [in Lua 5] \endverbatim * \ingroup imgclass */ void imImageReshape(imImage* image, int width, int height); /** Copy image data and attributes from one image to another. \n * Images must have the same size and type. * * \verbatim image:Copy(dst_image: imImage) [in Lua 5] \endverbatim * \ingroup imgclass */ void imImageCopy(const imImage* src_image, imImage* dst_image); /** Copy image data only fom one image to another. \n * Images must have the same size and type. * * \verbatim image:CopyData(dst_image: imImage) [in Lua 5] \endverbatim * \ingroup imgclass */ void imImageCopyData(const imImage* src_image, imImage* dst_image); /** Creates a copy of the image. * * \verbatim image:Duplicate() -> new_image: imImage [in Lua 5] \endverbatim * \ingroup imgclass */ imImage* imImageDuplicate(const imImage* image); /** Creates a clone of the image. i.e. same attributes but ignore contents. * * \verbatim image:Clone() -> new_image: imImage [in Lua 5] \endverbatim * \ingroup imgclass */ imImage* imImageClone(const imImage* image); /** Changes an extended attribute. \n * The data will be internally duplicated. \n * If data is NULL and count==0 the attribute is removed. \n * If count is -1 and data_type is IM_BYTE then data is zero terminated. * See also \ref imDataType. * * \verbatim image:SetAttribute(attrib: string, data_type: number, data: table of numbers or string) [in Lua 5] \endverbatim * If data_type is IM_BYTE, as_string can be used as data. * \ingroup imgclass */ void imImageSetAttribute(const imImage* image, const char* attrib, int data_type, int count, const void* data); /** Returns an extended attribute. \n * Returns NULL if not found. * See also \ref imDataType. * * \verbatim image:GetAttribute(attrib: string, [as_string: boolean]) -> data: table of numbers or string, data_type: number [in Lua 5] \endverbatim * If data_type is IM_BYTE, as_string can be used to return a string instead of a table. * \ingroup imgclass */ const void* imImageGetAttribute(const imImage* image, const char* attrib, int *data_type, int *count); /** Returns a list of the attribute names. \n * "attrib" must contain room enough for "attrib_count" names. Use "attrib=NULL" to return only the count. * * \verbatim image:GetAttributeList() -> data: table of strings [in Lua 5] \endverbatim * \ingroup imgclass */ void imImageGetAttributeList(const imImage* image, char** attrib, int *attrib_count); /** Sets all image data to zero. But if color space is YCBCR, LAB or LUV, and data type is BYTE or USHORT, then * data is initialized with 128 or 32768 accordingly. Alpha is initialized as transparent (0). * * \verbatim image:Clear() [in Lua 5] \endverbatim * \ingroup imgclass */ void imImageClear(imImage* image); /** Indicates that the image can be viewed in common graphic devices. * Data type must be IM_BYTE. Color mode can be IM_RGB, IM_MAP, IM_GRAY or IM_BINARY. * * \verbatim image:IsBitmap() -> is_bitmap: boolean [in Lua 5] \endverbatim * \ingroup imgclass */ int imImageIsBitmap(const imImage* image); /** Changes the image palette. * This will destroy the existing palette and replace it with the given palette pointer. * Only the pointer is stored, so the palette should be a new palette and it can not be a static array. * * \verbatim image:SetPalette(palette: imPalette) [in Lua 5] \endverbatim * \ingroup imgclass */ void imImageSetPalette(imImage* image, long* palette, int palette_count); /** Copies the image attributes from src to dst. * * \verbatim image:CopyAttributes(dst_image: imImage) [in Lua 5] \endverbatim * \ingroup imgclass */ void imImageCopyAttributes(const imImage* src_image, imImage* dst_image); /** Returns 1 if the images match width and height. Returns 0 otherwise. * * \verbatim image:MatchSize(image2: imImage) -> match: boolean [in Lua 5] \endverbatim * \ingroup imgclass */ int imImageMatchSize(const imImage* image1, const imImage* image2); /** Returns 1 if the images match color mode and data type. Returns 0 otherwise. * * \verbatim image:MatchColor(image2: imImage) -> match: boolean [in Lua 5] \endverbatim * \ingroup imgclass */ int imImageMatchColor(const imImage* image1, const imImage* image2); /** Returns 1 if the images match width, height and data type. Returns 0 otherwise. * * \verbatim image:MatchDataType(image2: imImage) -> match: boolean [in Lua 5] \endverbatim * \ingroup imgclass */ int imImageMatchDataType(const imImage* image1, const imImage* image2); /** Returns 1 if the images match width, height and color space. Returns 0 otherwise. * * \verbatim image:MatchColorSpace(image2: imImage) -> match: boolean [in Lua 5] \endverbatim * \ingroup imgclass */ int imImageMatchColorSpace(const imImage* image1, const imImage* image2); /** Returns 1 if the images match in width, height, data type and color space. Returns 0 otherwise. * * \verbatim image:Match(image2: imImage) -> match: boolean [in Lua 5] \endverbatim * \ingroup imgclass */ int imImageMatch(const imImage* image1, const imImage* image2); /** Changes the image color space from gray to binary by just changing color_space and the palette. * * \verbatim image:SetBinary() [in Lua 5] \endverbatim * \ingroup imgclass */ void imImageSetBinary(imImage* image); /** Changes a gray BYTE data (0,255) into a binary data (0,1), done in-place. Color space is not changed. * * \verbatim image:MakeBinary() [in Lua 5] \endverbatim * \ingroup imgclass */ void imImageMakeBinary(imImage *image); /** Changes a binary data (0,1) into a gray BYTE data (0,255), done in-place. Color space is not changed. * * \verbatim image:MakeGray() [in Lua 5] \endverbatim * \ingroup imgclass */ void imImageMakeGray(imImage *image); /** \defgroup imgfile imImage Storage * * \par * Functions to simplify the process of reading and writting imImage structures. * Will also load and save the alpha planes when possible. * \par * See \ref im_image.h * \ingroup file */ /** Loads an image from an already open file. Returns NULL if failed. \n * This will call \ref imFileReadImageInfo and \ref imFileReadImageData. \n * index specifies the image number between 0 and image_count-1. \n * The returned image will be of the same color_space and data_type of the image in the file. \n * Attributes from the file will be stored at the image. * See also \ref imErrorCodes. * * \verbatim ifile:LoadImage([index: number]) -> image: imImage, error: number [in Lua 5] \endverbatim * Default index is 0. * \ingroup imgfile */ imImage* imFileLoadImage(imFile* ifile, int index, int *error); /** Loads an image from an already open file. Returns NULL if failed. \n * This function assumes that the image in the file has the same parameters as the given image. \n * This will call \ref imFileReadImageInfo and \ref imFileReadImageData. \n * index specifies the image number between 0 and image_count-1. \n * The returned image will be of the same color_space and data_type of the image in the file. \n * Attributes from the file will be stored at the image. * See also \ref imErrorCodes. * * \verbatim ifile:LoadImageFrame(index: number, image: imImage) -> error: number [in Lua 5] \endverbatim * Default index is 0. * \ingroup imgfile */ void imFileLoadImageFrame(imFile* ifile, int index, imImage* image, int *error); /** Loads an image from an already open file, but forces the image to be a bitmap.\n * The returned imagem will be always a Bitmap image, with color_space RGB, MAP, GRAY or BINARY, and data_type IM_BYTE. \n * index specifies the image number between 0 and image_count-1. \n * Returns NULL if failed. * Attributes from the file will be stored at the image. * See also \ref imErrorCodes. * * \verbatim ifile:LoadBitmap([index: number]) -> image: imImage, error: number [in Lua 5] \endverbatim * Default index is 0. * \ingroup imgfile */ imImage* imFileLoadBitmap(imFile* ifile, int index, int *error); /** Loads an image region from an already open file. Returns NULL if failed. \n * This will call \ref imFileReadImageInfo and \ref imFileReadImageData. \n * index specifies the image number between 0 and image_count-1. \n * The returned image will be of the same color_space and data_type of the image in the file, * or will be a Bitmap image. \n * Attributes from the file will be stored at the image. * See also \ref imErrorCodes. \n * For now, it works only for the ECW file format. * * \verbatim ifile:LoadRegion(index, bitmap, xmin, xmax, ymin, ymax, width, height: number) -> image: imImage, error: number [in Lua 5] \endverbatim * Default index is 0. * \ingroup imgfile */ imImage* imFileLoadImageRegion(imFile* ifile, int index, int bitmap, int *error, int xmin, int xmax, int ymin, int ymax, int width, int height); /** Loads an image from an already open file, but forces the image to be a bitmap.\n * This function assumes that the image in the file has the same parameters as the given image. \n * The imagem must be a Bitmap image, with color_space RGB, MAP, GRAY or BINARY, and data_type IM_BYTE. \n * index specifies the image number between 0 and image_count-1. \n * Returns NULL if failed. * Attributes from the file will be stored at the image. * See also \ref imErrorCodes. * * \verbatim ifile:LoadBitmapFrame(index: number, image: imImage) -> error: number [in Lua 5] \endverbatim * Default index is 0. * \ingroup imgfile */ void imFileLoadBitmapFrame(imFile* ifile, int index, imImage* image, int *error); /** Saves the image to an already open file. \n * This will call \ref imFileWriteImageInfo and \ref imFileWriteImageData. \n * Attributes from the image will be stored at the file. * Returns error code. * * \verbatim ifile:SaveImage(image: imImage) -> error: number [in Lua 5] \endverbatim * \ingroup imgfile */ int imFileSaveImage(imFile* ifile, const imImage* image); /** Loads an image from file. Open, loads and closes the file. \n * index specifies the image number between 0 and image_count-1. \n * Returns NULL if failed. * Attributes from the file will be stored at the image. * See also \ref imErrorCodes. * * \verbatim im.FileImageLoad(file_name: string, [index: number]) -> image: imImage, error: number [in Lua 5] \endverbatim * Default index is 0. * \ingroup imgfile */ imImage* imFileImageLoad(const char* file_name, int index, int *error); /** Loads an image from file, but forces the image to be a bitmap. Open, loads and closes the file. \n * index specifies the image number between 0 and image_count-1. \n * Returns NULL if failed. * Attributes from the file will be stored at the image. * See also \ref imErrorCodes. * * \verbatim im.FileImageLoadBitmap(file_name: string, [index: number]) -> image: imImage, error: number [in Lua 5] \endverbatim * Default index is 0. * \ingroup imgfile */ imImage* imFileImageLoadBitmap(const char* file_name, int index, int *error); /** Loads an image region from file. Open, loads and closes the file. \n * index specifies the image number between 0 and image_count-1. \n * Returns NULL if failed. * Attributes from the file will be stored at the image. * See also \ref imErrorCodes. \n * For now, it works only for the ECW file format. * * \verbatim im.FileImageLoadRegion(file_name: string, index, bitmap, xmin, xmax, ymin, ymax, width, height: number, ) -> image: imImage, error: number [in Lua 5] \endverbatim * Default index is 0. * \ingroup imgfile */ imImage* imFileImageLoadRegion(const char* file_name, int index, int bitmap, int *error, int xmin, int xmax, int ymin, int ymax, int width, int height); /** Saves the image to file. Open, saves and closes the file. \n * Returns error code. \n * Attributes from the image will be stored at the file. * * \verbatim im.FileImageSave(file_name: string, format: string, image: imImage) -> error: number [in Lua 5] \endverbatim * \verbatim image:Save(file_name: string, format: string) -> error: number [in Lua 5] \endverbatim * \ingroup imgfile */ int imFileImageSave(const char* file_name, const char* format, const imImage* image); /** Utility macro to draw the image in a CD library canvas. * Works only for data_type IM_BYTE, and color spaces: IM_RGB, IM_MAP, IMGRAY and IM_BINARY. * \ingroup imgclass */ #define imcdCanvasPutImage(_canvas, _image, _x, _y, _w, _h, _xmin, _xmax, _ymin, _ymax) \ { \ if (_image->color_space == IM_RGB) \ { \ if (_image->has_alpha) \ cdCanvasPutImageRectRGBA(_canvas, _image->width, _image->height, \ (unsigned char*)_image->data[0], \ (unsigned char*)_image->data[1], \ (unsigned char*)_image->data[2], \ (unsigned char*)_image->data[3], \ _x, _y, _w, _h, _xmin, _xmax, _ymin, _ymax); \ else \ cdCanvasPutImageRectRGB(_canvas, _image->width, _image->height, \ (unsigned char*)_image->data[0], \ (unsigned char*)_image->data[1], \ (unsigned char*)_image->data[2], \ _x, _y, _w, _h, _xmin, _xmax, _ymin, _ymax); \ } \ else \ cdCanvasPutImageRectMap(_canvas, _image->width, _image->height, \ (unsigned char*)_image->data[0], _image->palette, \ _x, _y, _w, _h, _xmin, _xmax, _ymin, _ymax); \ } #if defined(__cplusplus) } #endif #endif