501 lines
23 KiB
C
Executable File
501 lines
23 KiB
C
Executable File
/** \file
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* \brief Image Manipulation
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*
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* See Copyright Notice in im_lib.h
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*/
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#ifndef __IM_IMAGE_H
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#define __IM_IMAGE_H
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/** \defgroup imgclass imImage
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*
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* \par
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* Base definitions and functions for image representation. \n
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* Only the image processing operations depends on these definitions,
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* Image Storage and Image Capture are completely independent.
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* \par
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* You can also initialize a structure with your own memory buffer, see \ref imImageInit.
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* To release the structure without releasing the buffer,
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* set "data[0]" to NULL before calling imImageDestroy.
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* \par
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* See \ref im_image.h
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* \ingroup imagerep */
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/** \brief Image Representation Structure
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*
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* \par
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* An image representation than supports all the color spaces,
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* but planes are always unpacked and the orientation is always bottom up.
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* \ingroup imgclass */
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typedef struct _imImage
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{
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/* main parameters */
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int width; /**< Number of columns. image:Width() -> width: number [in Lua 5]. */
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int height; /**< Number of lines. image:Height() -> height: number [in Lua 5]. */
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int color_space; /**< Color space descriptor. See also \ref imColorSpace. image:ColorSpace() -> color_space: number [in Lua 5]. */
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int data_type; /**< Data type descriptor. See also \ref imDataType. image:DataType() -> data_type: number [in Lua 5]. */
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int has_alpha; /**< Indicates that there is an extra channel with alpha. image:HasAlpha() -> has_alpha: boolean [in Lua 5]. \n
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It will not affect the secondary parameters, i.e. the number of planes will be in fact depth+1. \n
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It is always 0 unless imImageAddAlpha is called. Alpha is automatically added in image loading functions. */
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/* secondary parameters */
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int depth; /**< Number of planes (ColorSpaceDepth) image:Depth() -> depth: number [in Lua 5]. */
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int line_size; /**< Number of bytes per line in one plane (width * DataTypeSize) */
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int plane_size; /**< Number of bytes per plane. (line_size * height) */
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int size; /**< Number of bytes occupied by the image (plane_size * depth) */
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int count; /**< Number of pixels per plane (width * height) */
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/* image data */
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void** data; /**< Image data organized as a 2D matrix with several planes. \n
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But plane 0 is also a pointer to the full data. \n
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The remaining planes are: "data[i] = data[0] + i*plane_size". \n
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In Lua, data indexing is possible using: "image[plane][line][column]". \n
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Also in Lua, is possible to set all pixels using a table calling "image:SetPixels(table)"
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and get all pixels using "table = image:GetPixels()" (Since 3.9). */
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/* image attributes */
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long *palette; /**< Color palette. image:GetPalette() -> palette: imPalette [in Lua 5]. \n
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Used only when depth=1. Otherwise is NULL. */
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int palette_count; /**< The palette is always 256 colors allocated, but can have less colors used. */
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void* attributes_table; /**< in fact is an imAttribTable, but we hide this here */
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} imImage;
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/** Creates a new image.
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* See also \ref imDataType and \ref imColorSpace. Image data is cleared as \ref imImageClear. \n
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* In Lua the IM image metatable name is "imImage".
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* 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,
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* and other values are replaced by the respective attributes.
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* If the image is already destroyed by im.ImageDestroy, then it will return also the suffix "-destroyed".
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*
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* \verbatim im.ImageCreate(width: number, height: number, color_space: number, data_type: number) -> image: imImage [in Lua 5] \endverbatim
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* \ingroup imgclass */
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imImage* imImageCreate(int width, int height, int color_space, int data_type);
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/** Initializes the image structure but does not allocates image data.
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* See also \ref imDataType and \ref imColorSpace.
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* The only addtional flag thar color_mode can has here is IM_ALPHA.
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* To release the image structure without releasing the buffer,
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* set "data[0]" to NULL before calling imImageDestroy.
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* \ingroup imgclass */
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imImage* imImageInit(int width, int height, int color_mode, int data_type, void* data_buffer, long* palette, int palette_count);
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/** Creates a new image based on an existing one. \n
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* If the addicional parameters are -1, the given image parameters are used. \n
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* The image atributes always are copied. HasAlpha is copied.
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* See also \ref imDataType and \ref imColorSpace.
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*
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* \verbatim im.ImageCreateBased(image: imImage, [width: number], [height: number], [color_space: number], [data_type: number]) -> image: imImage [in Lua 5] \endverbatim
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* The addicional parameters in Lua can be nil,
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* and they can also be functions with the based image as a parameter to return the respective value.
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* \ingroup imgclass */
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imImage* imImageCreateBased(const imImage* image, int width, int height, int color_space, int data_type);
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/** Destroys the image and frees the memory used.
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* image data is destroyed only if its data[0] is not NULL. \n
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* In Lua if this function is not called, the image is destroyed by the garbage collector.
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*
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* \verbatim im.ImageDestroy(image: imImage) [in Lua 5] \endverbatim
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* \verbatim image:Destroy() [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageDestroy(imImage* image);
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/** Adds an alpha channel plane and sets its value to 0 (transparent).
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*
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* \verbatim image:AddAlpha() [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageAddAlpha(imImage* image);
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/** Sets the alpha channel plane to a constant.
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*
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* \verbatim image:SetAlpha(alpha: number) [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageSetAlpha(imImage* image, double alpha);
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/** Removes the alpha channel plane if any.
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*
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* \verbatim image:RemoveAlpha() [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageRemoveAlpha(imImage* image);
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/** Changes the buffer size. Reallocate internal buffers if the new size is larger than the original.
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*
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* \verbatim image:Reshape(width: number, height: number) [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageReshape(imImage* image, int width, int height);
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/** Copy image data and attributes from one image to another. \n
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* Images must have the same size and type.
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*
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* \verbatim image:Copy(dst_image: imImage) [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageCopy(const imImage* src_image, imImage* dst_image);
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/** Copy image data only fom one image to another. \n
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* Images must have the same size and type.
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*
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* \verbatim image:CopyData(dst_image: imImage) [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageCopyData(const imImage* src_image, imImage* dst_image);
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/** Copies the image attributes from src to dst.
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* Includes the pallete if defined in both images.
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*
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* \verbatim image:CopyAttributes(dst_image: imImage) [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageCopyAttributes(const imImage* src_image, imImage* dst_image);
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/** Merges the image attributes from src to dst. \n
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* Attributes that exist in dst are not replaced.
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* Doens NOT include the pallete.
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*
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* \verbatim image:MergeAttributes(dst_image: imImage) [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageMergeAttributes(const imImage* src_image, imImage* dst_image);
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/** Copy one image plane fom one image to another. \n
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* Images must have the same size and type.
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*
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* \verbatim image:CopyPlane(src_plane: number, dst_image: imImage, dst_plane: number) [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageCopyPlane(const imImage* src_image, int src_plane, imImage* dst_image, int dst_plane);
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/** Creates a copy of the image.
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*
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* \verbatim image:Duplicate() -> new_image: imImage [in Lua 5] \endverbatim
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* \ingroup imgclass */
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imImage* imImageDuplicate(const imImage* image);
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/** Creates a clone of the image. i.e. same attributes but ignore contents.
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*
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* \verbatim image:Clone() -> new_image: imImage [in Lua 5] \endverbatim
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* \ingroup imgclass */
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imImage* imImageClone(const imImage* image);
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/** Changes an extended attribute. \n
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* The data will be internally duplicated. \n
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* If data is NULL and count==0 the attribute is removed. \n
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* If count is -1 and data_type is IM_BYTE then data is zero terminated.
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* See also \ref imDataType.
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*
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* \verbatim image:SetAttribute(attrib: string, data_type: number, data: table of numbers or string) [in Lua 5] \endverbatim
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* If data_type is IM_BYTE, a string can be used as data.
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* \ingroup imgclass */
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void imImageSetAttribute(const imImage* image, const char* attrib, int data_type, int count, const void* data);
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/** Changes an extended attribute as an integer.
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*
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* \verbatim image:SetAttribInteger(attrib: string, data_type: number, value: number) [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageSetAttribInteger(const imImage* image, const char* attrib, int data_type, int value);
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/** Changes an extended attribute as a real.
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*
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* \verbatim image:SetAttribReal(attrib: string, data_type: number, value: number) [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageSetAttribReal(const imImage* image, const char* attrib, int data_type, double value);
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/** Changes an extended attribute as a string.
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*
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* \verbatim image:SetAttribString(attrib: string, value: string) [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageSetAttribString(const imImage* image, const char* attrib, const char* value);
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/** Returns an extended attribute. \n
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* Returns NULL if not found.
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* See also \ref imDataType.
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*
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* \verbatim image:GetAttribute(attrib: string, [as_string: boolean]) -> data: table of numbers or string, data_type: number [in Lua 5] \endverbatim
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* If data_type is IM_BYTE, as_string can be used to return a string instead of a table.
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* \ingroup imgclass */
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const void* imImageGetAttribute(const imImage* image, const char* attrib, int *data_type, int *count);
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/** Returns an extended attribute as an integer.
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*
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* \verbatim image:GetAttribInteger(attrib: string, [index: number]) -> value: number [in Lua 5] \endverbatim
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* \ingroup imgclass */
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int imImageGetAttribInteger(const imImage* image, const char* attrib, int index);
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/** Returns an extended attribute as a real.
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*
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* \verbatim image:GetAttribReal(attrib: string, [index: number]) -> value: number [in Lua 5] \endverbatim
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* \ingroup imgclass */
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double imImageGetAttribReal(const imImage* image, const char* attrib, int index);
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/** Returns an extended attribute as a string.
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*
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* \verbatim image:GetAttribString(attrib: string) -> value: string [in Lua 5] \endverbatim
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* \ingroup imgclass */
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const char* imImageGetAttribString(const imImage* image, const char* attrib);
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/** Returns a list of the attribute names. \n
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* "attrib" must contain room enough for "attrib_count" names. Use "attrib=NULL" to return only the count.
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*
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* \verbatim image:GetAttributeList() -> data: table of strings [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageGetAttributeList(const imImage* image, char** attrib, int *attrib_count);
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/** Sets all image data to zero. But if color space is YCBCR, LAB or LUV, and data type is BYTE or USHORT, then
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* data is initialized with 128 or 32768 accordingly. Alpha is initialized as transparent (0).
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*
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* \verbatim image:Clear() [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageClear(imImage* image);
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/** Indicates that the image can be viewed in common graphic devices.
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* Data type must be IM_BYTE. Color mode can be IM_RGB, IM_MAP, IM_GRAY or IM_BINARY.
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*
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* \verbatim image:IsBitmap() -> is_bitmap: boolean [in Lua 5] \endverbatim
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* \ingroup imgclass */
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int imImageIsBitmap(const imImage* image);
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/** Changes the image palette.
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* This will destroy the existing palette and replace it with the given palette pointer.
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* Only the pointer is stored, so the palette should be a new palette and it can not be a static array.
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*
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* \verbatim image:SetPalette(palette: imPalette) [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageSetPalette(imImage* image, long* palette, int palette_count);
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/** Returns 1 if the images match width and height. Returns 0 otherwise.
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*
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* \verbatim image:MatchSize(image2: imImage) -> match: boolean [in Lua 5] \endverbatim
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* \ingroup imgclass */
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int imImageMatchSize(const imImage* image1, const imImage* image2);
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/** Returns 1 if the images match color mode and data type. Returns 0 otherwise.
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*
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* \verbatim image:MatchColor(image2: imImage) -> match: boolean [in Lua 5] \endverbatim
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* \ingroup imgclass */
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int imImageMatchColor(const imImage* image1, const imImage* image2);
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/** Returns 1 if the images match width, height and data type. Returns 0 otherwise.
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*
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* \verbatim image:MatchDataType(image2: imImage) -> match: boolean [in Lua 5] \endverbatim
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* \ingroup imgclass */
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int imImageMatchDataType(const imImage* image1, const imImage* image2);
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/** Returns 1 if the images match width, height and color space. Returns 0 otherwise.
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*
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* \verbatim image:MatchColorSpace(image2: imImage) -> match: boolean [in Lua 5] \endverbatim
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* \ingroup imgclass */
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int imImageMatchColorSpace(const imImage* image1, const imImage* image2);
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/** Returns 1 if the images match in width, height, data type and color space. Returns 0 otherwise.
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*
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* \verbatim image:Match(image2: imImage) -> match: boolean [in Lua 5] \endverbatim
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* \ingroup imgclass */
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int imImageMatch(const imImage* image1, const imImage* image2);
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/** Changes the image color space to map
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* by just changing color_space. \n
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* Image must be BINARY or GRAY/BYTE.
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*
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* \verbatim image:SetMap() [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageSetMap(imImage* image);
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/** Changes the image color space to binary
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* by just changing color_space and the palette.
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* Image must be MAP or GRAY/BYTE.
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*
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* \verbatim image:SetBinary() [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageSetBinary(imImage* image);
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/** Changes the image color space to gray
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* by just changing color_space and the palette.
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* Image must be BINARY or MAP. Palette is changed only if image was BINARY.
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*
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* \verbatim image:SetGray() [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageSetGray(imImage* image);
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/** Changes a gray BYTE data (0,255) into a binary data (0,1), done in-place.
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* Color space is not changed. Data type must be IM_BYTE.
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*
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* \verbatim image:MakeBinary() [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageMakeBinary(imImage *image);
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/** Changes a binary data (0,1) into a gray BYTE data (0,255), done in-place.
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* Color space is not changed. Data type must be IM_BYTE.
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*
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* \verbatim image:MakeGray() [in Lua 5] \endverbatim
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* \ingroup imgclass */
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void imImageMakeGray(imImage *image);
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/** \defgroup imgfile imImage Storage
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*
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* \par
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* Functions to simplify the process of reading and writting imImage structures.
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* Will also load and save the alpha planes when possible.
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* \par
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* See \ref im_image.h
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* \ingroup file */
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/** Loads an image from an already open file. Returns NULL if failed. \n
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* This will call \ref imFileReadImageInfo and \ref imFileReadImageData. \n
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* index specifies the image number between 0 and image_count-1. \n
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* The returned image will be of the same color_space and data_type of the image in the file. \n
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* Attributes from the file will be stored at the image.
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* See also \ref imErrorCodes.
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*
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* \verbatim ifile:LoadImage([index: number]) -> image: imImage, error: number [in Lua 5] \endverbatim
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* Default index is 0.
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* \ingroup imgfile */
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imImage* imFileLoadImage(imFile* ifile, int index, int *error);
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/** Loads an image from an already open file. Returns NULL if failed. \n
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* This function assumes that the image in the file has the same parameters as the given image. \n
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* This will call \ref imFileReadImageInfo and \ref imFileReadImageData. \n
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* index specifies the image number between 0 and image_count-1. \n
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* The returned image will be of the same color_space and data_type of the image in the file. \n
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* Attributes from the file will be stored at the image.
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* See also \ref imErrorCodes.
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*
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* \verbatim ifile:LoadImageFrame(index: number, image: imImage) -> error: number [in Lua 5] \endverbatim
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* Default index is 0.
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* \ingroup imgfile */
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void imFileLoadImageFrame(imFile* ifile, int index, imImage* image, int *error);
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/** Loads an image from an already open file, but forces the image to be a bitmap.\n
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* The returned imagem will be always a Bitmap image, with color_space RGB, MAP, GRAY or BINARY, and data_type IM_BYTE. \n
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* index specifies the image number between 0 and image_count-1. \n
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* Returns NULL if failed.
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* Attributes from the file will be stored at the image.
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* See also \ref imErrorCodes.
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*
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* \verbatim ifile:LoadBitmap([index: number]) -> image: imImage, error: number [in Lua 5] \endverbatim
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* Default index is 0.
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* \ingroup imgfile */
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imImage* imFileLoadBitmap(imFile* ifile, int index, int *error);
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/** Loads an image region from an already open file. Returns NULL if failed. \n
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* This will call \ref imFileReadImageInfo and \ref imFileReadImageData. \n
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* index specifies the image number between 0 and image_count-1. \n
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* The returned image will be of the same color_space and data_type of the image in the file,
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* or will be a Bitmap image. \n
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* Attributes from the file will be stored at the image.
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* See also \ref imErrorCodes. \n
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* For now, it works only for the ECW file format.
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*
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* \verbatim ifile:LoadRegion(index, bitmap, xmin, xmax, ymin, ymax, width, height: number) -> image: imImage, error: number [in Lua 5] \endverbatim
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* Default index is 0.
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* \ingroup imgfile */
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imImage* imFileLoadImageRegion(imFile* ifile, int index, int bitmap, int *error,
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int xmin, int xmax, int ymin, int ymax, int width, int height);
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/** Loads an image from an already open file, but forces the image to be a bitmap.\n
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* This function assumes that the image in the file has the same parameters as the given image. \n
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* The imagem must be a Bitmap image, with color_space RGB, MAP, GRAY or BINARY, and data_type IM_BYTE. \n
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* index specifies the image number between 0 and image_count-1. \n
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* Returns NULL if failed.
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* Attributes from the file will be stored at the image.
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* See also \ref imErrorCodes.
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*
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* \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
|