Mercurial > hgrepos > Python2 > PyMuPDF
diff mupdf-source/thirdparty/leptonica/src/pixcomp.c @ 2:b50eed0cc0ef upstream
ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
The directory name has changed: no version number in the expanded directory now.
| author | Franz Glasner <fzglas.hg@dom66.de> |
|---|---|
| date | Mon, 15 Sep 2025 11:43:07 +0200 |
| parents | |
| children |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mupdf-source/thirdparty/leptonica/src/pixcomp.c Mon Sep 15 11:43:07 2025 +0200 @@ -0,0 +1,2390 @@ +/*====================================================================* + - Copyright (C) 2001 Leptonica. All rights reserved. + - + - Redistribution and use in source and binary forms, with or without + - modification, are permitted provided that the following conditions + - are met: + - 1. Redistributions of source code must retain the above copyright + - notice, this list of conditions and the following disclaimer. + - 2. Redistributions in binary form must reproduce the above + - copyright notice, this list of conditions and the following + - disclaimer in the documentation and/or other materials + - provided with the distribution. + - + - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + - ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY + - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + - OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + *====================================================================*/ + +/*! + * \file pixcomp.c + * <pre> + * + * Pixcomp creation and destruction + * PIXC *pixcompCreateFromPix() + * PIXC *pixcompCreateFromString() + * PIXC *pixcompCreateFromFile() + * void pixcompDestroy() + * PIXC *pixcompCopy() + + * Pixcomp accessors + * l_int32 pixcompGetDimensions() + * l_int32 pixcompGetParameters() + * + * Pixcomp compression selection + * l_int32 pixcompDetermineFormat() + * + * Pixcomp conversion to Pix + * PIX *pixCreateFromPixcomp() + * + * Pixacomp creation and destruction + * PIXAC *pixacompCreate() + * PIXAC *pixacompCreateWithInit() + * PIXAC *pixacompCreateFromPixa() + * PIXAC *pixacompCreateFromFiles() + * PIXAC *pixacompCreateFromSA() + * void pixacompDestroy() + * + * Pixacomp addition/replacement + * l_int32 pixacompAddPix() + * l_int32 pixacompAddPixcomp() + * static l_int32 pixacompExtendArray() + * l_int32 pixacompReplacePix() + * l_int32 pixacompReplacePixcomp() + * l_int32 pixacompAddBox() + * + * Pixacomp accessors + * l_int32 pixacompGetCount() + * PIXC *pixacompGetPixcomp() + * PIX *pixacompGetPix() + * l_int32 pixacompGetPixDimensions() + * BOXA *pixacompGetBoxa() + * l_int32 pixacompGetBoxaCount() + * BOX *pixacompGetBox() + * l_int32 pixacompGetBoxGeometry() + * l_int32 pixacompGetOffset() + * l_int32 pixacompSetOffset() + * + * Pixacomp conversion to Pixa + * PIXA *pixaCreateFromPixacomp() + * + * Combining pixacomp + * l_int32 pixacompJoin() + * PIXAC *pixacompInterleave() + * + * Pixacomp serialized I/O + * PIXAC *pixacompRead() + * PIXAC *pixacompReadStream() + * PIXAC *pixacompReadMem() + * l_int32 pixacompWrite() + * l_int32 pixacompWriteStream() + * l_int32 pixacompWriteMem() + * + * Conversion to pdf + * l_int32 pixacompConvertToPdf() + * l_int32 pixacompConvertToPdfData() + * l_int32 pixacompFastConvertToPdfData() + * + * Output for debugging + * l_int32 pixacompWriteStreamInfo() + * l_int32 pixcompWriteStreamInfo() + * PIX *pixacompDisplayTiledAndScaled() + * l_int32 pixacompWriteFiles() + * l_int32 pixcompWriteFile() + * + * The Pixacomp is an array of Pixcomp, where each Pixcomp is a compressed + * string of the image. We don't use reference counting here. + * The basic application is to allow a large array of highly + * compressible images to reside in memory. We purposely don't + * reuse the Pixa for this, to avoid confusion and programming errors. + * + * Three compression formats are used: g4, png and jpeg. + * The compression type can be either specified or defaulted. + * If specified and it is not possible to compress (for example, + * you specify a jpeg on a 1 bpp image or one with a colormap), + * the compression type defaults to png. The jpeg compression quality + * can be specified using l_setJpegQuality(); otherwise the default is 75. + * + * The serialized version of the Pixacomp is similar to that for + * a Pixa, except that each Pixcomp can be compressed by one of + * tiffg4, png, or jpeg. Unlike serialization of the Pixa, + * serialization of the Pixacomp does not require any imaging + * libraries because it simply reads and writes the compressed data. + * + * There are two modes of use in accumulating images: + * (1) addition to the end of the array + * (2) random insertion (replacement) into the array + * + * In use, we assume that the array is fully populated up to the + * index value (n - 1), where n is the value of the pixcomp field n. + * Addition can only be made to the end of the fully populated array, + * at the index value n. Insertion can be made randomly, but again + * only within the array of pixcomps; i.e., within the set of + * indices {0 .... n-1}. The functions are pixacompReplacePix() + * and pixacompReplacePixcomp(), and they destroy the existing pixcomp. + * + * For addition to the end of the array, initialize the pixacomp with + * pixacompCreate(), which generates an empty array of pixcomps ptrs. + * For random insertion and replacement of pixcomp into a pixacomp, + * initialize a fully populated array using pixacompCreateWithInit(). + * + * The offset field allows you to use an offset-based index to + * access the 0-based ptr array in the pixacomp. This would typically + * be used to map the pixacomp array index to a page number, or v.v. + * By default, the offset is 0. For example, suppose you have 50 images, + * corresponding to page numbers 10 - 59. Then you could use + * pixac = pixacompCreateWithInit(50, 10, ...); + * This would allocate an array of 50 pixcomps, but if you asked for + * the pix at index 10, using pixacompGetPix(pixac, 10), it would + * apply the offset internally, returning the pix at index 0 in the array. + * </pre> + */ + +#ifdef HAVE_CONFIG_H +#include <config_auto.h> +#endif /* HAVE_CONFIG_H */ + +#include <string.h> +#include "allheaders.h" +#include "pix_internal.h" + + /* Bounds on pixacomp array size */ +static const l_uint32 MaxPtrArraySize = 1000000; +static const l_int32 InitialPtrArraySize = 20; /*!< n'importe quoi */ + + /* Bound on size for a compressed data string */ +static const size_t MaxDataSize = 1000000000; /* 1 GB */ + + /* These two globals are defined in writefile.c */ +extern l_int32 NumImageFileFormatExtensions; +extern const char *ImageFileFormatExtensions[]; + + /* Static functions */ +static l_int32 pixacompExtendArray(PIXAC *pixac); +static l_int32 pixcompFastConvertToPdfData(PIXC *pixc, const char *title, + l_uint8 **pdata, size_t *pnbytes); + + +/*---------------------------------------------------------------------* + * Pixcomp creation and destruction * + *---------------------------------------------------------------------*/ +/*! + * \brief pixcompCreateFromPix() + * + * \param[in] pix + * \param[in] comptype IFF_DEFAULT, IFF_TIFF_G4, IFF_PNG, IFF_JFIF_JPEG + * \return pixc, or NULL on error + * + * <pre> + * Notes: + * (1) Use %comptype == IFF_DEFAULT to have the compression + * type automatically determined. + * (2) To compress jpeg with a quality other than the default (75), use + * l_jpegSetQuality() + * </pre> + */ +PIXC * +pixcompCreateFromPix(PIX *pix, + l_int32 comptype) +{ +size_t size; +char *text; +l_int32 ret, format; +l_uint8 *data; +PIXC *pixc; + + if (!pix) + return (PIXC *)ERROR_PTR("pix not defined", __func__, NULL); + if (comptype != IFF_DEFAULT && comptype != IFF_TIFF_G4 && + comptype != IFF_PNG && comptype != IFF_JFIF_JPEG) + return (PIXC *)ERROR_PTR("invalid comptype", __func__, NULL); + + pixc = (PIXC *)LEPT_CALLOC(1, sizeof(PIXC)); + pixGetDimensions(pix, &pixc->w, &pixc->h, &pixc->d); + pixGetResolution(pix, &pixc->xres, &pixc->yres); + if (pixGetColormap(pix)) + pixc->cmapflag = 1; + if ((text = pixGetText(pix)) != NULL) + pixc->text = stringNew(text); + + pixcompDetermineFormat(comptype, pixc->d, pixc->cmapflag, &format); + pixc->comptype = format; + ret = pixWriteMem(&data, &size, pix, format); + if (ret) { + L_ERROR("write to memory failed\n", __func__); + pixcompDestroy(&pixc); + return NULL; + } + pixc->data = data; + pixc->size = size; + + return pixc; +} + + +/*! + * \brief pixcompCreateFromString() + * + * \param[in] data compressed string + * \param[in] size number of bytes + * \param[in] copyflag L_INSERT or L_COPY + * \return pixc, or NULL on error + * + * <pre> + * Notes: + * (1) This works when the compressed string is png, jpeg or tiffg4. + * (2) The copyflag determines if the data in the new Pixcomp is + * a copy of the input data. + * </pre> + */ +PIXC * +pixcompCreateFromString(l_uint8 *data, + size_t size, + l_int32 copyflag) +{ +l_int32 format, w, h, d, bps, spp, iscmap; +PIXC *pixc; + + if (!data) + return (PIXC *)ERROR_PTR("data not defined", __func__, NULL); + if (copyflag != L_INSERT && copyflag != L_COPY) + return (PIXC *)ERROR_PTR("invalid copyflag", __func__, NULL); + + if (pixReadHeaderMem(data, size, &format, &w, &h, &bps, &spp, &iscmap) == 1) + return (PIXC *)ERROR_PTR("header data not read", __func__, NULL); + pixc = (PIXC *)LEPT_CALLOC(1, sizeof(PIXC)); + d = (spp == 3) ? 32 : bps * spp; + pixc->w = w; + pixc->h = h; + pixc->d = d; + pixc->comptype = format; + pixc->cmapflag = iscmap; + if (copyflag == L_INSERT) + pixc->data = data; + else + pixc->data = l_binaryCopy(data, size); + pixc->size = size; + return pixc; +} + + +/*! + * \brief pixcompCreateFromFile() + * + * \param[in] filename + * \param[in] comptype IFF_DEFAULT, IFF_TIFF_G4, IFF_PNG, IFF_JFIF_JPEG + * \return pixc, or NULL on error + * + * <pre> + * Notes: + * (1) Use %comptype == IFF_DEFAULT to have the compression + * type automatically determined. + * (2) If the comptype is invalid for this file, the default will + * be substituted. + * </pre> + */ +PIXC * +pixcompCreateFromFile(const char *filename, + l_int32 comptype) +{ +l_int32 format; +size_t nbytes; +l_uint8 *data; +PIX *pix; +PIXC *pixc; + + if (!filename) + return (PIXC *)ERROR_PTR("filename not defined", __func__, NULL); + if (comptype != IFF_DEFAULT && comptype != IFF_TIFF_G4 && + comptype != IFF_PNG && comptype != IFF_JFIF_JPEG) + return (PIXC *)ERROR_PTR("invalid comptype", __func__, NULL); + + findFileFormat(filename, &format); + if (format == IFF_UNKNOWN) { + L_ERROR("unreadable file: %s\n", __func__, filename); + return NULL; + } + + /* Can we accept the encoded file directly? Remember that + * png is the "universal" compression type, so if requested + * it takes precedence. Otherwise, if the file is already + * compressed in g4 or jpeg, just accept the string. */ + if ((format == IFF_TIFF_G4 && comptype != IFF_PNG) || + (format == IFF_JFIF_JPEG && comptype != IFF_PNG)) + comptype = format; + if (comptype != IFF_DEFAULT && comptype == format) { + data = l_binaryRead(filename, &nbytes); + if ((pixc = pixcompCreateFromString(data, nbytes, L_INSERT)) == NULL) { + LEPT_FREE(data); + return (PIXC *)ERROR_PTR("pixc not made (string)", __func__, NULL); + } + return pixc; + } + + /* Need to recompress in the default format */ + if ((pix = pixRead(filename)) == NULL) + return (PIXC *)ERROR_PTR("pix not read", __func__, NULL); + if ((pixc = pixcompCreateFromPix(pix, comptype)) == NULL) { + pixDestroy(&pix); + return (PIXC *)ERROR_PTR("pixc not made", __func__, NULL); + } + pixDestroy(&pix); + return pixc; +} + + +/*! + * \brief pixcompDestroy() + * + * \param[in,out] ppixc use ptr address so it will be nulled + * \return void + * + * <pre> + * Notes: + * (1) Always nulls the input ptr. + * </pre> + */ +void +pixcompDestroy(PIXC **ppixc) +{ +PIXC *pixc; + + if (!ppixc) { + L_WARNING("ptr address is null!\n", __func__); + return; + } + + if ((pixc = *ppixc) == NULL) + return; + + LEPT_FREE(pixc->data); + if (pixc->text) + LEPT_FREE(pixc->text); + LEPT_FREE(pixc); + *ppixc = NULL; +} + + +/*! + * \brief pixcompCopy() + * + * \param[in] pixcs + * \return pixcd, or NULL on error + * + * <pre> + * Notes: + * (1) Limit the size of the compressed pix to 500 MB. + * </pre> + */ +PIXC * +pixcompCopy(PIXC *pixcs) +{ +size_t size; +l_uint8 *datas, *datad; +PIXC *pixcd; + + if (!pixcs) + return (PIXC *)ERROR_PTR("pixcs not defined", __func__, NULL); + size = pixcs->size; + if (size > MaxDataSize) + return (PIXC *)ERROR_PTR("size > 1 GB; too big", __func__, NULL); + + pixcd = (PIXC *)LEPT_CALLOC(1, sizeof(PIXC)); + pixcd->w = pixcs->w; + pixcd->h = pixcs->h; + pixcd->d = pixcs->d; + pixcd->xres = pixcs->xres; + pixcd->yres = pixcs->yres; + pixcd->comptype = pixcs->comptype; + if (pixcs->text != NULL) + pixcd->text = stringNew(pixcs->text); + pixcd->cmapflag = pixcs->cmapflag; + + /* Copy image data */ + datas = pixcs->data; + if ((datad = (l_uint8 *)LEPT_CALLOC(size, sizeof(l_int8))) == NULL) { + pixcompDestroy(&pixcd); + return (PIXC *)ERROR_PTR("pixcd not made", __func__, NULL); + } + memcpy(datad, datas, size); + pixcd->data = datad; + pixcd->size = size; + return pixcd; +} + + +/*---------------------------------------------------------------------* + * Pixcomp accessors * + *---------------------------------------------------------------------*/ +/*! + * \brief pixcompGetDimensions() + * + * \param[in] pixc + * \param[out] pw, ph, pd [optional] + * \return 0 if OK, 1 on error + */ +l_ok +pixcompGetDimensions(PIXC *pixc, + l_int32 *pw, + l_int32 *ph, + l_int32 *pd) +{ + if (!pixc) + return ERROR_INT("pixc not defined", __func__, 1); + if (pw) *pw = pixc->w; + if (ph) *ph = pixc->h; + if (pd) *pd = pixc->d; + return 0; +} + + +/*! + * \brief pixcompGetParameters() + * + * \param[in] pixc + * \param[out] pxres, pyres, pcomptype, pcmapflag [optional] + * \return 0 if OK, 1 on error + */ +l_ok +pixcompGetParameters(PIXC *pixc, + l_int32 *pxres, + l_int32 *pyres, + l_int32 *pcomptype, + l_int32 *pcmapflag) +{ + if (!pixc) + return ERROR_INT("pixc not defined", __func__, 1); + if (pxres) *pxres = pixc->xres; + if (pyres) *pyres = pixc->yres; + if (pcomptype) *pcomptype = pixc->comptype; + if (pcmapflag) *pcmapflag = pixc->cmapflag; + return 0; +} + + +/*---------------------------------------------------------------------* + * Pixcomp compression selection * + *---------------------------------------------------------------------*/ +/*! + * \brief pixcompDetermineFormat() + * + * \param[in] comptype IFF_DEFAULT, IFF_TIFF_G4, IFF_PNG, IFF_JFIF_JPEG + * \param[in] d pix depth + * \param[in] cmapflag 1 if pix to be compressed as a colormap; 0 otherwise + * \param[out] pformat IFF_TIFF, IFF_PNG or IFF_JFIF_JPEG + * \return 0 if OK; 1 on error + * + * <pre> + * Notes: + * (1) This determines the best format for a pix, given both + * the request (%comptype) and the image characteristics. + * (2) If %comptype == IFF_DEFAULT, this does not necessarily result + * in png encoding. Instead, it returns one of the three formats + * that is both valid and most likely to give best compression. + * (3) If %d == 8 with no colormap and: + * * you wish to compress with png, use %comptype == IFF_PNG + * * you wish to compress with jpeg, use either + * %comptype == IFF_JFIF_JPEG or %comptype == IFF_DEFAULT. + * (4) If the pix cannot be compressed by the input value of + * %comptype, this selects IFF_PNG, which can compress all pix. + * </pre> + */ +l_ok +pixcompDetermineFormat(l_int32 comptype, + l_int32 d, + l_int32 cmapflag, + l_int32 *pformat) +{ + + if (!pformat) + return ERROR_INT("&format not defined", __func__, 1); + *pformat = IFF_PNG; /* init value and default */ + if (comptype != IFF_DEFAULT && comptype != IFF_TIFF_G4 && + comptype != IFF_PNG && comptype != IFF_JFIF_JPEG) + return ERROR_INT("invalid comptype", __func__, 1); + + if (comptype == IFF_DEFAULT) { + if (d == 1) + *pformat = IFF_TIFF_G4; + else if (d == 16) + *pformat = IFF_PNG; + else if (d >= 8 && !cmapflag) + *pformat = IFF_JFIF_JPEG; + } else if (comptype == IFF_TIFF_G4 && d == 1) { + *pformat = IFF_TIFF_G4; + } else if (comptype == IFF_JFIF_JPEG && d >= 8 && !cmapflag) { + *pformat = IFF_JFIF_JPEG; + } + + return 0; +} + + +/*---------------------------------------------------------------------* + * Pixcomp conversion to Pix * + *---------------------------------------------------------------------*/ +/*! + * \brief pixCreateFromPixcomp() + * + * \param[in] pixc + * \return pix, or NULL on error + */ +PIX * +pixCreateFromPixcomp(PIXC *pixc) +{ +l_int32 w, h, d, cmapinpix, format; +PIX *pix; + + if (!pixc) + return (PIX *)ERROR_PTR("pixc not defined", __func__, NULL); + + if ((pix = pixReadMem(pixc->data, pixc->size)) == NULL) + return (PIX *)ERROR_PTR("pix not read", __func__, NULL); + pixSetResolution(pix, pixc->xres, pixc->yres); + if (pixc->text) + pixSetText(pix, pixc->text); + + /* Check fields for consistency */ + pixGetDimensions(pix, &w, &h, &d); + if (pixc->w != w) { + L_INFO("pix width %d != pixc width %d\n", __func__, w, pixc->w); + L_ERROR("pix width %d != pixc width\n", __func__, w); + } + if (pixc->h != h) + L_ERROR("pix height %d != pixc height\n", __func__, h); + if (pixc->d != d) { + if (pixc->d == 16) /* we strip 16 --> 8 bpp by default */ + L_WARNING("pix depth %d != pixc depth 16\n", __func__, d); + else + L_ERROR("pix depth %d != pixc depth\n", __func__, d); + } + cmapinpix = (pixGetColormap(pix) != NULL); + if ((cmapinpix && !pixc->cmapflag) || (!cmapinpix && pixc->cmapflag)) + L_ERROR("pix cmap flag inconsistent\n", __func__); + format = pixGetInputFormat(pix); + if (format != pixc->comptype) { + L_ERROR("pix comptype %d not equal to pixc comptype\n", + __func__, format); + } + + return pix; +} + + +/*---------------------------------------------------------------------* + * Pixacomp creation and destruction * + *---------------------------------------------------------------------*/ +/*! + * \brief pixacompCreate() + * + * \param[in] n initial number of ptrs + * \return pixac, or NULL on error + */ +PIXAC * +pixacompCreate(l_int32 n) +{ +PIXAC *pixac; + + if (n <= 0 || n > (l_int32)MaxPtrArraySize) + n = InitialPtrArraySize; + + pixac = (PIXAC *)LEPT_CALLOC(1, sizeof(PIXAC)); + pixac->n = 0; + pixac->nalloc = n; + pixac->offset = 0; + if ((pixac->pixc = (PIXC **)LEPT_CALLOC(n, sizeof(PIXC *))) == NULL) { + pixacompDestroy(&pixac); + return (PIXAC *)ERROR_PTR("pixc ptrs not made", __func__, NULL); + } + if ((pixac->boxa = boxaCreate(n)) == NULL) { + pixacompDestroy(&pixac); + return (PIXAC *)ERROR_PTR("boxa not made", __func__, NULL); + } + + return pixac; +} + + +/*! + * \brief pixacompCreateWithInit() + * + * \param[in] n initial number of ptrs + * \param[in] offset difference: accessor index - pixacomp array index + * \param[in] pix [optional] initialize each ptr in pixacomp + * to this pix; can be NULL + * \param[in] comptype IFF_DEFAULT, IFF_TIFF_G4, IFF_PNG, IFF_JFIF_JPEG + * \return pixac, or NULL on error + * + * <pre> + * Notes: + * (1) Initializes a pixacomp to be fully populated with %pix, + * compressed using %comptype. If %pix == NULL, %comptype + * is ignored. + * (2) Typically, the array is initialized with a tiny pix. + * This is most easily done by setting %pix == NULL, causing + * initialization of each array element with a tiny placeholder + * pix (w = h = d = 1), using comptype = IFF_TIFF_G4 . + * (3) Example usage: + * // Generate pixacomp for pages 30 - 49. This has an array + * // size of 20 and the page number offset is 30. + * PixaComp *pixac = pixacompCreateWithInit(20, 30, NULL, + * IFF_TIFF_G4); + * // Now insert png-compressed images into the initialized array + * for (pageno = 30; pageno < 50; pageno++) { + * Pix *pixt = ... // derived from image[pageno] + * if (pixt) + * pixacompReplacePix(pixac, pageno, pixt, IFF_PNG); + * pixDestroy(&pixt); + * } + * The result is a pixac with 20 compressed strings, and with + * selected pixt replacing the placeholders. + * To extract the image for page 38, which is decompressed + * from element 8 in the array, use: + * pixt = pixacompGetPix(pixac, 38); + * </pre> + */ +PIXAC * +pixacompCreateWithInit(l_int32 n, + l_int32 offset, + PIX *pix, + l_int32 comptype) +{ +l_int32 i; +PIX *pixt; +PIXC *pixc; +PIXAC *pixac; + + if (n <= 0 || n > (l_int32)MaxPtrArraySize) + return (PIXAC *)ERROR_PTR("n out of valid bounds", __func__, NULL); + if (pix) { + if (comptype != IFF_DEFAULT && comptype != IFF_TIFF_G4 && + comptype != IFF_PNG && comptype != IFF_JFIF_JPEG) + return (PIXAC *)ERROR_PTR("invalid comptype", __func__, NULL); + } else { + comptype = IFF_TIFF_G4; + } + if (offset < 0) { + L_WARNING("offset < 0; setting to 0\n", __func__); + offset = 0; + } + + if ((pixac = pixacompCreate(n)) == NULL) + return (PIXAC *)ERROR_PTR("pixac not made", __func__, NULL); + pixacompSetOffset(pixac, offset); + if (pix) + pixt = pixClone(pix); + else + pixt = pixCreate(1, 1, 1); + for (i = 0; i < n; i++) { + pixc = pixcompCreateFromPix(pixt, comptype); + pixacompAddPixcomp(pixac, pixc, L_INSERT); + } + pixDestroy(&pixt); + + return pixac; +} + + +/*! + * \brief pixacompCreateFromPixa() + * + * \param[in] pixa + * \param[in] comptype IFF_DEFAULT, IFF_TIFF_G4, IFF_PNG, IFF_JFIF_JPEG + * \param[in] accesstype L_COPY, L_CLONE, L_COPY_CLONE + * \return 0 if OK, 1 on error + * + * <pre> + * Notes: + * (1) If %format == IFF_DEFAULT, the conversion format for each + * image is chosen automatically. Otherwise, we use the + * specified format unless it can't be done (e.g., jpeg + * for a 1, 2 or 4 bpp pix, or a pix with a colormap), + * in which case we use the default (assumed best) compression. + * (2) %accesstype is used to extract a boxa from %pixa. + * (3) To compress jpeg with a quality other than the default (75), use + * l_jpegSetQuality() + * </pre> + */ +PIXAC * +pixacompCreateFromPixa(PIXA *pixa, + l_int32 comptype, + l_int32 accesstype) +{ +l_int32 i, n; +BOXA *boxa; +PIX *pix; +PIXAC *pixac; + + if (!pixa) + return (PIXAC *)ERROR_PTR("pixa not defined", __func__, NULL); + if (comptype != IFF_DEFAULT && comptype != IFF_TIFF_G4 && + comptype != IFF_PNG && comptype != IFF_JFIF_JPEG) + return (PIXAC *)ERROR_PTR("invalid comptype", __func__, NULL); + if (accesstype != L_COPY && accesstype != L_CLONE && + accesstype != L_COPY_CLONE) + return (PIXAC *)ERROR_PTR("invalid accesstype", __func__, NULL); + + n = pixaGetCount(pixa); + if ((pixac = pixacompCreate(n)) == NULL) + return (PIXAC *)ERROR_PTR("pixac not made", __func__, NULL); + for (i = 0; i < n; i++) { + pix = pixaGetPix(pixa, i, L_CLONE); + pixacompAddPix(pixac, pix, comptype); + pixDestroy(&pix); + } + if ((boxa = pixaGetBoxa(pixa, accesstype)) != NULL) { + boxaDestroy(&pixac->boxa); + pixac->boxa = boxa; + } + + return pixac; +} + + +/*! + * \brief pixacompCreateFromFiles() + * + * \param[in] dirname + * \param[in] substr [optional] substring filter on filenames; can be null + * \param[in] comptype IFF_DEFAULT, IFF_TIFF_G4, IFF_PNG, IFF_JFIF_JPEG + * \return pixac, or NULL on error + * + * <pre> + * Notes: + * (1) %dirname is the full path for the directory. + * (2) %substr is the part of the file name (excluding + * the directory) that is to be matched. All matching + * filenames are read into the Pixa. If substr is NULL, + * all filenames are read into the Pixa. + * (3) Use %comptype == IFF_DEFAULT to have the compression + * type automatically determined for each file. + * (4) If the comptype is invalid for a file, the default will + * be substituted. + * </pre> + */ +PIXAC * +pixacompCreateFromFiles(const char *dirname, + const char *substr, + l_int32 comptype) +{ +PIXAC *pixac; +SARRAY *sa; + + if (!dirname) + return (PIXAC *)ERROR_PTR("dirname not defined", __func__, NULL); + if (comptype != IFF_DEFAULT && comptype != IFF_TIFF_G4 && + comptype != IFF_PNG && comptype != IFF_JFIF_JPEG) + return (PIXAC *)ERROR_PTR("invalid comptype", __func__, NULL); + + if ((sa = getSortedPathnamesInDirectory(dirname, substr, 0, 0)) == NULL) + return (PIXAC *)ERROR_PTR("sa not made", __func__, NULL); + pixac = pixacompCreateFromSA(sa, comptype); + sarrayDestroy(&sa); + return pixac; +} + + +/*! + * \brief pixacompCreateFromSA() + * + * \param[in] sa full pathnames for all files + * \param[in] comptype IFF_DEFAULT, IFF_TIFF_G4, IFF_PNG, IFF_JFIF_JPEG + * \return pixac, or NULL on error + * + * <pre> + * Notes: + * (1) Use %comptype == IFF_DEFAULT to have the compression + * type automatically determined for each file. + * (2) If the comptype is invalid for a file, the default will + * be substituted. + * </pre> + */ +PIXAC * +pixacompCreateFromSA(SARRAY *sa, + l_int32 comptype) +{ +char *str; +l_int32 i, n; +PIXC *pixc; +PIXAC *pixac; + + if (!sa) + return (PIXAC *)ERROR_PTR("sarray not defined", __func__, NULL); + if (comptype != IFF_DEFAULT && comptype != IFF_TIFF_G4 && + comptype != IFF_PNG && comptype != IFF_JFIF_JPEG) + return (PIXAC *)ERROR_PTR("invalid comptype", __func__, NULL); + + n = sarrayGetCount(sa); + pixac = pixacompCreate(n); + for (i = 0; i < n; i++) { + str = sarrayGetString(sa, i, L_NOCOPY); + if ((pixc = pixcompCreateFromFile(str, comptype)) == NULL) { + L_ERROR("pixc not read from file: %s\n", __func__, str); + continue; + } + pixacompAddPixcomp(pixac, pixc, L_INSERT); + } + return pixac; +} + + +/*! + * \brief pixacompDestroy() + * + * \param[in,out] ppixac use ptr address so it will be nulled + * \return void + * + * <pre> + * Notes: + * (1) Always nulls the input ptr. + * </pre> + */ +void +pixacompDestroy(PIXAC **ppixac) +{ +l_int32 i; +PIXAC *pixac; + + if (ppixac == NULL) { + L_WARNING("ptr address is NULL!\n", __func__); + return; + } + + if ((pixac = *ppixac) == NULL) + return; + + for (i = 0; i < pixac->n; i++) + pixcompDestroy(&pixac->pixc[i]); + LEPT_FREE(pixac->pixc); + boxaDestroy(&pixac->boxa); + LEPT_FREE(pixac); + *ppixac = NULL; +} + + +/*---------------------------------------------------------------------* + * Pixacomp addition * + *---------------------------------------------------------------------*/ +/*! + * \brief pixacompAddPix() + * + * \param[in] pixac + * \param[in] pix to be added + * \param[in] comptype IFF_DEFAULT, IFF_TIFF_G4, IFF_PNG, IFF_JFIF_JPEG + * \return 0 if OK; 1 on error + * + * <pre> + * Notes: + * (1) The array is filled up to the (n-1)-th element, and this + * converts the input pix to a pixc and adds it at + * the n-th position. + * (2) The pixc produced from the pix is owned by the pixac. + * The input pix is not affected. + * </pre> + */ +l_ok +pixacompAddPix(PIXAC *pixac, + PIX *pix, + l_int32 comptype) +{ +l_int32 cmapflag, format; +PIXC *pixc; + + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 1); + if (!pix) + return ERROR_INT("pix not defined", __func__, 1); + if (comptype != IFF_DEFAULT && comptype != IFF_TIFF_G4 && + comptype != IFF_PNG && comptype != IFF_JFIF_JPEG) + return ERROR_INT("invalid format", __func__, 1); + + cmapflag = pixGetColormap(pix) ? 1 : 0; + pixcompDetermineFormat(comptype, pixGetDepth(pix), cmapflag, &format); + if ((pixc = pixcompCreateFromPix(pix, format)) == NULL) + return ERROR_INT("pixc not made", __func__, 1); + pixacompAddPixcomp(pixac, pixc, L_INSERT); + return 0; +} + + +/*! + * \brief pixacompAddPixcomp() + * + * \param[in] pixac + * \param[in] pixc to be added by insertion + * \param[in] copyflag L_INSERT, L_COPY + * \return 0 if OK; 1 on error + * + * <pre> + * Notes: + * (1) Anything added to a pixac is owned by the pixac. + * So do not L_INSERT a pixc that is owned by another pixac, + * or destroy a pixc that has been L_INSERTed. + * </pre> + */ +l_ok +pixacompAddPixcomp(PIXAC *pixac, + PIXC *pixc, + l_int32 copyflag) +{ +l_int32 n; + + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 1); + if (!pixc) + return ERROR_INT("pixc not defined", __func__, 1); + if (copyflag != L_INSERT && copyflag != L_COPY) + return ERROR_INT("invalid copyflag", __func__, 1); + + n = pixac->n; + if (n >= pixac->nalloc) { + if (pixacompExtendArray(pixac)) + return ERROR_INT("extension failed", __func__, 1); + } + + if (copyflag == L_INSERT) + pixac->pixc[n] = pixc; + else /* L_COPY */ + pixac->pixc[n] = pixcompCopy(pixc); + pixac->n++; + + return 0; +} + + +/*! + * \brief pixacompExtendArray() + * + * \param[in] pixac + * \return 0 if OK; 1 on error + * + * <pre> + * Notes: + * (1) We extend the boxa array simultaneously. This is + * necessary in case we are NOT adding boxes simultaneously + * with adding pixc. We always want the sizes of the + * pixac and boxa ptr arrays to be equal. + * (2) The max number of pixcomp ptrs is 1M. + * </pre> + */ +static l_int32 +pixacompExtendArray(PIXAC *pixac) +{ +size_t oldsize, newsize; + + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 1); + if (pixac->nalloc > (l_int32)MaxPtrArraySize) /* belt & suspenders */ + return ERROR_INT("pixac has too many ptrs", __func__, 1); + oldsize = pixac->nalloc * sizeof(PIXC *); + newsize = 2 * oldsize; + if (newsize > 8 * MaxPtrArraySize) /* ptrs for 1M pixcomp */ + return ERROR_INT("newsize > 8 MB; too large", __func__, 1); + + if ((pixac->pixc = (PIXC **)reallocNew((void **)&pixac->pixc, + oldsize, newsize)) == NULL) + return ERROR_INT("new ptr array not returned", __func__, 1); + pixac->nalloc *= 2; + boxaExtendArray(pixac->boxa); + return 0; +} + + +/*! + * \brief pixacompReplacePix() + * + * \param[in] pixac + * \param[in] index caller's view of index within pixac; includes offset + * \param[in] pix owned by the caller + * \param[in] comptype IFF_DEFAULT, IFF_TIFF_G4, IFF_PNG, IFF_JFIF_JPEG + * \return 0 if OK; 1 on error + * + * <pre> + * Notes: + * (1) The %index includes the offset, which must be subtracted + * to get the actual index into the ptr array. + * (2) The input %pix is converted to a pixc, which is then inserted + * into the pixac. + * </pre> + */ +l_ok +pixacompReplacePix(PIXAC *pixac, + l_int32 index, + PIX *pix, + l_int32 comptype) +{ +l_int32 n, aindex; +PIXC *pixc; + + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 1); + n = pixacompGetCount(pixac); + aindex = index - pixac->offset; + if (aindex < 0 || aindex >= n) + return ERROR_INT("array index out of bounds", __func__, 1); + if (!pix) + return ERROR_INT("pix not defined", __func__, 1); + if (comptype != IFF_DEFAULT && comptype != IFF_TIFF_G4 && + comptype != IFF_PNG && comptype != IFF_JFIF_JPEG) + return ERROR_INT("invalid format", __func__, 1); + + pixc = pixcompCreateFromPix(pix, comptype); + pixacompReplacePixcomp(pixac, index, pixc); + return 0; +} + + +/*! + * \brief pixacompReplacePixcomp() + * + * \param[in] pixac + * \param[in] index caller's view of index within pixac; includes offset + * \param[in] pixc to replace existing one, which is destroyed + * \return 0 if OK; 1 on error + * + * <pre> + * Notes: + * (1) The %index includes the offset, which must be subtracted + * to get the actual index into the ptr array. + * (2) The inserted %pixc is now owned by the pixac. The caller + * must not destroy it. + * </pre> + */ +l_ok +pixacompReplacePixcomp(PIXAC *pixac, + l_int32 index, + PIXC *pixc) +{ +l_int32 n, aindex; +PIXC *pixct; + + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 1); + n = pixacompGetCount(pixac); + aindex = index - pixac->offset; + if (aindex < 0 || aindex >= n) + return ERROR_INT("array index out of bounds", __func__, 1); + if (!pixc) + return ERROR_INT("pixc not defined", __func__, 1); + + pixct = pixacompGetPixcomp(pixac, index, L_NOCOPY); /* use %index */ + pixcompDestroy(&pixct); + pixac->pixc[aindex] = pixc; /* replace; use array index */ + + return 0; +} + + +/*! + * \brief pixacompAddBox() + * + * \param[in] pixac + * \param[in] box + * \param[in] copyflag L_INSERT, L_COPY + * \return 0 if OK, 1 on error + */ +l_ok +pixacompAddBox(PIXAC *pixac, + BOX *box, + l_int32 copyflag) +{ + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 1); + if (!box) + return ERROR_INT("box not defined", __func__, 1); + if (copyflag != L_INSERT && copyflag != L_COPY) + return ERROR_INT("invalid copyflag", __func__, 1); + + boxaAddBox(pixac->boxa, box, copyflag); + return 0; +} + + +/*---------------------------------------------------------------------* + * Pixacomp accessors * + *---------------------------------------------------------------------*/ +/*! + * \brief pixacompGetCount() + * + * \param[in] pixac + * \return count, or 0 if no pixa + */ +l_int32 +pixacompGetCount(PIXAC *pixac) +{ + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 0); + + return pixac->n; +} + + +/*! + * \brief pixacompGetPixcomp() + * + * \param[in] pixac + * \param[in] index caller's view of index within pixac; includes offset + * \param[in] copyflag L_NOCOPY, L_COPY + * \return pixc, or NULL on error + * + * <pre> + * Notes: + * (1) The %index includes the offset, which must be subtracted + * to get the actual index into the ptr array. + * (2) If copyflag == L_NOCOPY, the pixc is owned by %pixac; do + * not destroy. + * </pre> + */ +PIXC * +pixacompGetPixcomp(PIXAC *pixac, + l_int32 index, + l_int32 copyflag) +{ +l_int32 aindex; + + if (!pixac) + return (PIXC *)ERROR_PTR("pixac not defined", __func__, NULL); + if (copyflag != L_NOCOPY && copyflag != L_COPY) + return (PIXC *)ERROR_PTR("invalid copyflag", __func__, NULL); + aindex = index - pixac->offset; + if (aindex < 0 || aindex >= pixac->n) + return (PIXC *)ERROR_PTR("array index not valid", __func__, NULL); + + if (copyflag == L_NOCOPY) + return pixac->pixc[aindex]; + else /* L_COPY */ + return pixcompCopy(pixac->pixc[aindex]); +} + + +/*! + * \brief pixacompGetPix() + * + * \param[in] pixac + * \param[in] index caller's view of index within pixac; includes offset + * \return pix, or NULL on error + * + * <pre> + * Notes: + * (1) The %index includes the offset, which must be subtracted + * to get the actual index into the ptr array. + * </pre> + */ +PIX * +pixacompGetPix(PIXAC *pixac, + l_int32 index) +{ +l_int32 aindex; +PIXC *pixc; + + if (!pixac) + return (PIX *)ERROR_PTR("pixac not defined", __func__, NULL); + aindex = index - pixac->offset; + if (aindex < 0 || aindex >= pixac->n) + return (PIX *)ERROR_PTR("array index not valid", __func__, NULL); + + pixc = pixacompGetPixcomp(pixac, index, L_NOCOPY); + return pixCreateFromPixcomp(pixc); +} + + +/*! + * \brief pixacompGetPixDimensions() + * + * \param[in] pixac + * \param[in] index caller's view of index within pixac; + * includes offset + * \param[out] pw, ph, pd [optional] each can be null + * \return 0 if OK, 1 on error + * + * <pre> + * Notes: + * (1) The %index includes the offset, which must be subtracted + * to get the actual index into the ptr array. + * </pre> + */ +l_ok +pixacompGetPixDimensions(PIXAC *pixac, + l_int32 index, + l_int32 *pw, + l_int32 *ph, + l_int32 *pd) +{ +l_int32 aindex; +PIXC *pixc; + + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 1); + aindex = index - pixac->offset; + if (aindex < 0 || aindex >= pixac->n) + return ERROR_INT("array index not valid", __func__, 1); + + if ((pixc = pixac->pixc[aindex]) == NULL) + return ERROR_INT("pixc not found!", __func__, 1); + pixcompGetDimensions(pixc, pw, ph, pd); + return 0; +} + + +/*! + * \brief pixacompGetBoxa() + * + * \param[in] pixac + * \param[in] accesstype L_COPY, L_CLONE, L_COPY_CLONE + * \return boxa, or NULL on error + */ +BOXA * +pixacompGetBoxa(PIXAC *pixac, + l_int32 accesstype) +{ + if (!pixac) + return (BOXA *)ERROR_PTR("pixac not defined", __func__, NULL); + if (!pixac->boxa) + return (BOXA *)ERROR_PTR("boxa not defined", __func__, NULL); + if (accesstype != L_COPY && accesstype != L_CLONE && + accesstype != L_COPY_CLONE) + return (BOXA *)ERROR_PTR("invalid accesstype", __func__, NULL); + + return boxaCopy(pixac->boxa, accesstype); +} + + +/*! + * \brief pixacompGetBoxaCount() + * + * \param[in] pixac + * \return count, or 0 on error + */ +l_int32 +pixacompGetBoxaCount(PIXAC *pixac) +{ + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 0); + + return boxaGetCount(pixac->boxa); +} + + +/*! + * \brief pixacompGetBox() + * + * \param[in] pixac + * \param[in] index caller's view of index within pixac; + * includes offset + * \param[in] accesstype L_COPY or L_CLONE + * \return box if null, not automatically an error, or NULL on error + * + * <pre> + * Notes: + * (1) The %index includes the offset, which must be subtracted + * to get the actual index into the ptr array. + * (2) There is always a boxa with a pixac, and it is initialized so + * that each box ptr is NULL. + * (3) In general, we expect that there is either a box associated + * with each pixc, or no boxes at all in the boxa. + * (4) Having no boxes is thus not an automatic error. Whether it + * is an actual error is determined by the calling program. + * If the caller expects to get a box, it is an error; see, e.g., + * pixacGetBoxGeometry(). + * </pre> + */ +BOX * +pixacompGetBox(PIXAC *pixac, + l_int32 index, + l_int32 accesstype) +{ +l_int32 aindex; +BOX *box; + + if (!pixac) + return (BOX *)ERROR_PTR("pixac not defined", __func__, NULL); + if (!pixac->boxa) + return (BOX *)ERROR_PTR("boxa not defined", __func__, NULL); + aindex = index - pixac->offset; + if (aindex < 0 || aindex >= pixac->boxa->n) + return (BOX *)ERROR_PTR("array index not valid", __func__, NULL); + if (accesstype != L_COPY && accesstype != L_CLONE) + return (BOX *)ERROR_PTR("invalid accesstype", __func__, NULL); + + box = pixac->boxa->box[aindex]; + if (box) { + if (accesstype == L_COPY) + return boxCopy(box); + else /* accesstype == L_CLONE */ + return boxClone(box); + } else { + return NULL; + } +} + + +/*! + * \brief pixacompGetBoxGeometry() + * + * \param[in] pixac + * \param[in] index caller's view of index within pixac; + * includes offset + * \param[out] px, py, pw, ph [optional] each can be null + * \return 0 if OK, 1 on error + * + * <pre> + * Notes: + * (1) The %index includes the offset, which must be subtracted + * to get the actual index into the ptr array. + * </pre> + */ +l_ok +pixacompGetBoxGeometry(PIXAC *pixac, + l_int32 index, + l_int32 *px, + l_int32 *py, + l_int32 *pw, + l_int32 *ph) +{ +l_int32 aindex; +BOX *box; + + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 1); + aindex = index - pixac->offset; + if (aindex < 0 || aindex >= pixac->n) + return ERROR_INT("array index not valid", __func__, 1); + + if ((box = pixacompGetBox(pixac, aindex, L_CLONE)) == NULL) + return ERROR_INT("box not found!", __func__, 1); + boxGetGeometry(box, px, py, pw, ph); + boxDestroy(&box); + return 0; +} + + +/*! + * \brief pixacompGetOffset() + * + * \param[in] pixac + * \return offset, or 0 on error + * + * <pre> + * Notes: + * (1) The offset is the difference between the caller's view of + * the index into the array and the actual array index. + * By default it is 0. + * </pre> + */ +l_int32 +pixacompGetOffset(PIXAC *pixac) +{ + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 0); + return pixac->offset; +} + + +/*! + * \brief pixacompSetOffset() + * + * \param[in] pixac + * \param[in] offset non-negative + * \return 0 if OK, 1 on error + * + * <pre> + * Notes: + * (1) The offset is the difference between the caller's view of + * the index into the array and the actual array index. + * By default it is 0. + * </pre> + */ +l_ok +pixacompSetOffset(PIXAC *pixac, + l_int32 offset) +{ + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 1); + pixac->offset = L_MAX(0, offset); + return 0; +} + + +/*---------------------------------------------------------------------* + * Pixacomp conversion to Pixa * + *---------------------------------------------------------------------*/ +/*! + * \brief pixaCreateFromPixacomp() + * + * \param[in] pixac + * \param[in] accesstype L_COPY, L_CLONE, L_COPY_CLONE; for boxa + * \return pixa if OK, or NULL on error + * + * <pre> + * Notes: + * (1) Because the pixa has no notion of offset, the offset must + * be set to 0 before the conversion, so that pixacompGetPix() + * fetches all the pixcomps. It is reset at the end. + * </pre> + */ +PIXA * +pixaCreateFromPixacomp(PIXAC *pixac, + l_int32 accesstype) +{ +l_int32 i, n, offset; +PIX *pix; +PIXA *pixa; + + if (!pixac) + return (PIXA *)ERROR_PTR("pixac not defined", __func__, NULL); + if (accesstype != L_COPY && accesstype != L_CLONE && + accesstype != L_COPY_CLONE) + return (PIXA *)ERROR_PTR("invalid accesstype", __func__, NULL); + + n = pixacompGetCount(pixac); + offset = pixacompGetOffset(pixac); + pixacompSetOffset(pixac, 0); + if ((pixa = pixaCreate(n)) == NULL) + return (PIXA *)ERROR_PTR("pixa not made", __func__, NULL); + for (i = 0; i < n; i++) { + if ((pix = pixacompGetPix(pixac, i)) == NULL) { + L_WARNING("pix %d not made\n", __func__, i); + continue; + } + pixaAddPix(pixa, pix, L_INSERT); + } + if (pixa->boxa) { + boxaDestroy(&pixa->boxa); + pixa->boxa = pixacompGetBoxa(pixac, accesstype); + } + pixacompSetOffset(pixac, offset); + + return pixa; +} + + +/*---------------------------------------------------------------------* + * Combining pixacomp + *---------------------------------------------------------------------*/ +/*! + * \brief pixacompJoin() + * + * \param[in] pixacd dest pixac; add to this one + * \param[in] pixacs [optional] source pixac; add from this one + * \param[in] istart starting index in pixacs + * \param[in] iend ending index in pixacs; use -1 to cat all + * \return 0 if OK, 1 on error + * + * <pre> + * Notes: + * (1) This appends a clone of each indicated pixc in pixcas to pixcad + * (2) istart < 0 is taken to mean 'read from the start' (istart = 0) + * (3) iend < 0 means 'read to the end' + * (4) If pixacs is NULL or contains no pixc, this is a no-op. + * </pre> + */ +l_ok +pixacompJoin(PIXAC *pixacd, + PIXAC *pixacs, + l_int32 istart, + l_int32 iend) +{ +l_int32 i, n, nb; +BOXA *boxas, *boxad; +PIXC *pixc; + + if (!pixacd) + return ERROR_INT("pixacd not defined", __func__, 1); + if (!pixacs || ((n = pixacompGetCount(pixacs)) == 0)) + return 0; + + if (istart < 0) + istart = 0; + if (iend < 0 || iend >= n) + iend = n - 1; + if (istart > iend) + return ERROR_INT("istart > iend; nothing to add", __func__, 1); + + for (i = istart; i <= iend; i++) { + pixc = pixacompGetPixcomp(pixacs, i, L_NOCOPY); + pixacompAddPixcomp(pixacd, pixc, L_COPY); + } + + boxas = pixacompGetBoxa(pixacs, L_CLONE); + boxad = pixacompGetBoxa(pixacd, L_CLONE); + nb = pixacompGetBoxaCount(pixacs); + iend = L_MIN(iend, nb - 1); + boxaJoin(boxad, boxas, istart, iend); + boxaDestroy(&boxas); /* just the clones */ + boxaDestroy(&boxad); /* ditto */ + return 0; +} + + +/*! + * \brief pixacompInterleave() + * + * \param[in] pixac1 first src pixac + * \param[in] pixac2 second src pixac + * \return pixacd interleaved from sources, or NULL on error. + * + * <pre> + * Notes: + * (1) If the two pixac have different sizes, a warning is issued, + * and the number of pairs returned is the minimum size. + * </pre> + */ +PIXAC * +pixacompInterleave(PIXAC *pixac1, + PIXAC *pixac2) +{ +l_int32 i, n1, n2, n, nb1, nb2; +BOX *box; +PIXC *pixc1, *pixc2; +PIXAC *pixacd; + + if (!pixac1) + return (PIXAC *)ERROR_PTR("pixac1 not defined", __func__, NULL); + if (!pixac2) + return (PIXAC *)ERROR_PTR("pixac2 not defined", __func__, NULL); + n1 = pixacompGetCount(pixac1); + n2 = pixacompGetCount(pixac2); + n = L_MIN(n1, n2); + if (n == 0) + return (PIXAC *)ERROR_PTR("at least one input pixac is empty", + __func__, NULL); + if (n1 != n2) + L_WARNING("counts differ: %d != %d\n", __func__, n1, n2); + + pixacd = pixacompCreate(2 * n); + nb1 = pixacompGetBoxaCount(pixac1); + nb2 = pixacompGetBoxaCount(pixac2); + for (i = 0; i < n; i++) { + pixc1 = pixacompGetPixcomp(pixac1, i, L_COPY); + pixacompAddPixcomp(pixacd, pixc1, L_INSERT); + if (i < nb1) { + box = pixacompGetBox(pixac1, i, L_COPY); + pixacompAddBox(pixacd, box, L_INSERT); + } + pixc2 = pixacompGetPixcomp(pixac2, i, L_COPY); + pixacompAddPixcomp(pixacd, pixc2, L_INSERT); + if (i < nb2) { + box = pixacompGetBox(pixac2, i, L_COPY); + pixacompAddBox(pixacd, box, L_INSERT); + } + } + + return pixacd; +} + + +/*---------------------------------------------------------------------* + * Pixacomp serialized I/O * + *---------------------------------------------------------------------*/ +/*! + * \brief pixacompRead() + * + * \param[in] filename + * \return pixac, or NULL on error + * + * <pre> + * Notes: + * (1) Unlike the situation with serialized Pixa, where the image + * data is stored in png format, the Pixacomp image data + * can be stored in tiffg4, png and jpg formats. + * </pre> + */ +PIXAC * +pixacompRead(const char *filename) +{ +FILE *fp; +PIXAC *pixac; + + if (!filename) + return (PIXAC *)ERROR_PTR("filename not defined", __func__, NULL); + + if ((fp = fopenReadStream(filename)) == NULL) + return (PIXAC *)ERROR_PTR_1("stream not opened", + filename, __func__, NULL); + pixac = pixacompReadStream(fp); + fclose(fp); + if (!pixac) + return (PIXAC *)ERROR_PTR_1("pixac not read", + filename, __func__, NULL); + return pixac; +} + + +/*! + * \brief pixacompReadStream() + * + * \param[in] fp file stream + * \return pixac, or NULL on error + * + * <pre> + * Notes: + * (1) It is OK for the pixacomp to be empty. + * </pre> + */ +PIXAC * +pixacompReadStream(FILE *fp) +{ +char buf[256]; +l_uint8 *data; +l_int32 n, offset, i, w, h, d, ignore; +l_int32 comptype, cmapflag, version, xres, yres; +size_t size; +BOXA *boxa; +PIXC *pixc; +PIXAC *pixac; + + if (!fp) + return (PIXAC *)ERROR_PTR("stream not defined", __func__, NULL); + + if (fscanf(fp, "\nPixacomp Version %d\n", &version) != 1) + return (PIXAC *)ERROR_PTR("not a pixacomp file", __func__, NULL); + if (version != PIXACOMP_VERSION_NUMBER) + return (PIXAC *)ERROR_PTR("invalid pixacomp version", __func__, NULL); + if (fscanf(fp, "Number of pixcomp = %d\n", &n) != 1) + return (PIXAC *)ERROR_PTR("not a pixacomp file", __func__, NULL); + if (fscanf(fp, "Offset of index into array = %d", &offset) != 1) + return (PIXAC *)ERROR_PTR("offset not read", __func__, NULL); + if (n < 0) + return (PIXAC *)ERROR_PTR("num pixcomp ptrs < 0", __func__, NULL); + if (n > (l_int32)MaxPtrArraySize) + return (PIXAC *)ERROR_PTR("too many pixcomp ptrs", __func__, NULL); + if (n == 0) L_INFO("the pixacomp is empty\n", __func__); + + if ((pixac = pixacompCreate(n)) == NULL) + return (PIXAC *)ERROR_PTR("pixac not made", __func__, NULL); + if ((boxa = boxaReadStream(fp)) == NULL) { + pixacompDestroy(&pixac); + return (PIXAC *)ERROR_PTR("boxa not made", __func__, NULL); + } + boxaDestroy(&pixac->boxa); /* empty */ + pixac->boxa = boxa; + pixacompSetOffset(pixac, offset); + + for (i = 0; i < n; i++) { + if (fscanf(fp, "\nPixcomp[%d]: w = %d, h = %d, d = %d\n", + &ignore, &w, &h, &d) != 4) { + pixacompDestroy(&pixac); + return (PIXAC *)ERROR_PTR("dimension reading", __func__, NULL); + } + if (fscanf(fp, " comptype = %d, size = %zu, cmapflag = %d\n", + &comptype, &size, &cmapflag) != 3) { + pixacompDestroy(&pixac); + return (PIXAC *)ERROR_PTR("comptype/size reading", __func__, NULL); + } + if (size > MaxDataSize) { + pixacompDestroy(&pixac); + L_ERROR("data size = %zu is too big", __func__, size); + return NULL; + } + + /* Use fgets() and sscanf(); not fscanf(), for the last + * bit of header data before the binary data. The reason is + * that fscanf throws away white space, and if the binary data + * happens to begin with ascii character(s) that are white + * space, it will swallow them and all will be lost! */ + if (fgets(buf, sizeof(buf), fp) == NULL) { + pixacompDestroy(&pixac); + return (PIXAC *)ERROR_PTR("fgets read fail", __func__, NULL); + } + if (sscanf(buf, " xres = %d, yres = %d\n", &xres, &yres) != 2) { + pixacompDestroy(&pixac); + return (PIXAC *)ERROR_PTR("read fail for res", __func__, NULL); + } + if ((data = (l_uint8 *)LEPT_CALLOC(1, size)) == NULL) { + pixacompDestroy(&pixac); + return (PIXAC *)ERROR_PTR("calloc fail for data", __func__, NULL); + } + if (fread(data, 1, size, fp) != size) { + pixacompDestroy(&pixac); + LEPT_FREE(data); + return (PIXAC *)ERROR_PTR("error reading data", __func__, NULL); + } + fgetc(fp); /* swallow the ending nl */ + pixc = (PIXC *)LEPT_CALLOC(1, sizeof(PIXC)); + pixc->w = w; + pixc->h = h; + pixc->d = d; + pixc->xres = xres; + pixc->yres = yres; + pixc->comptype = comptype; + pixc->cmapflag = cmapflag; + pixc->data = data; + pixc->size = size; + pixacompAddPixcomp(pixac, pixc, L_INSERT); + } + return pixac; +} + + +/*! + * \brief pixacompReadMem() + * + * \param[in] data in pixacomp format + * \param[in] size of data + * \return pixac, or NULL on error + * + * <pre> + * Notes: + * (1) Deseralizes a buffer of pixacomp data into a pixac in memory. + * </pre> + */ +PIXAC * +pixacompReadMem(const l_uint8 *data, + size_t size) +{ +FILE *fp; +PIXAC *pixac; + + if (!data) + return (PIXAC *)ERROR_PTR("data not defined", __func__, NULL); + if ((fp = fopenReadFromMemory(data, size)) == NULL) + return (PIXAC *)ERROR_PTR("stream not opened", __func__, NULL); + + pixac = pixacompReadStream(fp); + fclose(fp); + if (!pixac) L_ERROR("pixac not read\n", __func__); + return pixac; +} + + +/*! + * \brief pixacompWrite() + * + * \param[in] filename + * \param[in] pixac + * \return 0 if OK, 1 on error + * + * <pre> + * Notes: + * (1) Unlike the situation with serialized Pixa, where the image + * data is stored in png format, the Pixacomp image data + * can be stored in tiffg4, png and jpg formats. + * </pre> + */ +l_ok +pixacompWrite(const char *filename, + PIXAC *pixac) +{ +l_int32 ret; +FILE *fp; + + if (!filename) + return ERROR_INT("filename not defined", __func__, 1); + if (!pixac) + return ERROR_INT("pixacomp not defined", __func__, 1); + + if ((fp = fopenWriteStream(filename, "wb")) == NULL) + return ERROR_INT_1("stream not opened", filename, __func__, 1); + ret = pixacompWriteStream(fp, pixac); + fclose(fp); + if (ret) + return ERROR_INT_1("pixacomp not written to stream", + filename, __func__, 1); + return 0; +} + + +/*! + * \brief pixacompWriteStream() + * + * \param[in] fp file stream + * \param[in] pixac + * \return 0 if OK, 1 on error + */ +l_ok +pixacompWriteStream(FILE *fp, + PIXAC *pixac) +{ +l_int32 n, i; +PIXC *pixc; + + if (!fp) + return ERROR_INT("stream not defined", __func__, 1); + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 1); + + n = pixacompGetCount(pixac); + fprintf(fp, "\nPixacomp Version %d\n", PIXACOMP_VERSION_NUMBER); + fprintf(fp, "Number of pixcomp = %d\n", n); + fprintf(fp, "Offset of index into array = %d", pixac->offset); + boxaWriteStream(fp, pixac->boxa); + for (i = 0; i < n; i++) { + if ((pixc = pixacompGetPixcomp(pixac, pixac->offset + i, L_NOCOPY)) + == NULL) + return ERROR_INT("pixc not found", __func__, 1); + fprintf(fp, "\nPixcomp[%d]: w = %d, h = %d, d = %d\n", + i, pixc->w, pixc->h, pixc->d); + fprintf(fp, " comptype = %d, size = %zu, cmapflag = %d\n", + pixc->comptype, pixc->size, pixc->cmapflag); + fprintf(fp, " xres = %d, yres = %d\n", pixc->xres, pixc->yres); + fwrite(pixc->data, 1, pixc->size, fp); + fprintf(fp, "\n"); + } + return 0; +} + + +/*! + * \brief pixacompWriteMem() + * + * \param[out] pdata serialized data of pixac + * \param[out] psize size of serialized data + * \param[in] pixac + * \return 0 if OK, 1 on error + * + * <pre> + * Notes: + * (1) Serializes a pixac in memory and puts the result in a buffer. + * </pre> + */ +l_ok +pixacompWriteMem(l_uint8 **pdata, + size_t *psize, + PIXAC *pixac) +{ +l_int32 ret; +FILE *fp; + + if (pdata) *pdata = NULL; + if (psize) *psize = 0; + if (!pdata) + return ERROR_INT("&data not defined", __func__, 1); + if (!psize) + return ERROR_INT("&size not defined", __func__, 1); + if (!pixac) + return ERROR_INT("&pixac not defined", __func__, 1); + +#if HAVE_FMEMOPEN + if ((fp = open_memstream((char **)pdata, psize)) == NULL) + return ERROR_INT("stream not opened", __func__, 1); + ret = pixacompWriteStream(fp, pixac); + fputc('\0', fp); + fclose(fp); + if (*psize > 0) *psize = *psize - 1; +#else + L_INFO("no fmemopen API --> work-around: write to temp file\n", __func__); + #ifdef _WIN32 + if ((fp = fopenWriteWinTempfile()) == NULL) + return ERROR_INT("tmpfile stream not opened", __func__, 1); + #else + if ((fp = tmpfile()) == NULL) + return ERROR_INT("tmpfile stream not opened", __func__, 1); + #endif /* _WIN32 */ + ret = pixacompWriteStream(fp, pixac); + rewind(fp); + *pdata = l_binaryReadStream(fp, psize); + fclose(fp); +#endif /* HAVE_FMEMOPEN */ + return ret; +} + + +/*--------------------------------------------------------------------* + * Conversion to pdf * + *--------------------------------------------------------------------*/ +/*! + * \brief pixacompConvertToPdf() + * + * \param[in] pixac containing images all at the same resolution + * \param[in] res override the resolution of each input image, + * in ppi; 0 to respect the resolution embedded + * in the input + * \param[in] scalefactor scaling factor applied to each image; > 0.0 + * \param[in] type encoding type (L_JPEG_ENCODE, L_G4_ENCODE, + * L_FLATE_ENCODE, L_JP2K_ENCODE, or + * L_DEFAULT_ENCODE for default) + * \param[in] quality used for JPEG only; 0 for default (75) + * \param[in] title [optional] pdf title + * \param[in] fileout pdf file of all images + * \return 0 if OK, 1 on error + * + * <pre> + * Notes: + * (1) This follows closely the function pixaConvertToPdf() in pdfio.c. + * (2) The images are encoded with G4 if 1 bpp; JPEG if 8 bpp without + * colormap and many colors, or 32 bpp; FLATE for anything else. + * (3) The scalefactor must be > 0.0; otherwise it is set to 1.0. + * (4) Specifying one of the three encoding types for %type forces + * all images to be compressed with that type. Use 0 to have + * the type determined for each image based on depth and whether + * or not it has a colormap. + * (5) If all images are jpeg compressed, don't require scaling + * and have the same resolution, it is much faster to skip + * transcoding with pixacompFastConvertToPdfData(), and then + * write the data out to file. + * </pre> + */ +l_ok +pixacompConvertToPdf(PIXAC *pixac, + l_int32 res, + l_float32 scalefactor, + l_int32 type, + l_int32 quality, + const char *title, + const char *fileout) +{ +l_uint8 *data; +l_int32 ret; +size_t nbytes; + + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 1); + + ret = pixacompConvertToPdfData(pixac, res, scalefactor, type, quality, + title, &data, &nbytes); + if (ret) { + LEPT_FREE(data); + return ERROR_INT("conversion to pdf failed", __func__, 1); + } + + ret = l_binaryWrite(fileout, "w", data, nbytes); + LEPT_FREE(data); + if (ret) + L_ERROR("pdf data not written to file\n", __func__); + return ret; +} + + +/*! + * \brief pixacompConvertToPdfData() + * + * \param[in] pixac containing images all at the same resolution + * \param[in] res input resolution of all images + * \param[in] scalefactor scaling factor applied to each image; > 0.0 + * \param[in] type encoding type (L_JPEG_ENCODE, L_G4_ENCODE, + * L_FLATE_ENCODE, L_JP2K_ENCODE, or + * L_DEFAULT_ENCODE for default) + * \param[in] quality used for JPEG only; 0 for default (75) + * \param[in] title [optional] pdf title + * \param[out] pdata output pdf data (of all images + * \param[out] pnbytes size of output pdf data + * \return 0 if OK, 1 on error + * + * <pre> + * Notes: + * (1) See pixacompConvertToPdf(). + * </pre> + */ +l_ok +pixacompConvertToPdfData(PIXAC *pixac, + l_int32 res, + l_float32 scalefactor, + l_int32 type, + l_int32 quality, + const char *title, + l_uint8 **pdata, + size_t *pnbytes) +{ +l_uint8 *imdata; +l_int32 i, n, ret, scaledres, pagetype; +size_t imbytes; +L_BYTEA *ba; +PIX *pixs, *pix; +L_PTRA *pa_data; + + if (!pdata) + return ERROR_INT("&data not defined", __func__, 1); + *pdata = NULL; + if (!pnbytes) + return ERROR_INT("&nbytes not defined", __func__, 1); + *pnbytes = 0; + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 1); + if (scalefactor <= 0.0) scalefactor = 1.0; + if (type != L_DEFAULT_ENCODE && type != L_JPEG_ENCODE && + type != L_G4_ENCODE && type != L_FLATE_ENCODE && + type != L_JP2K_ENCODE) { + L_WARNING("invalid compression type; using per-page default\n", + __func__); + type = L_DEFAULT_ENCODE; + } + + /* Generate all the encoded pdf strings */ + n = pixacompGetCount(pixac); + pa_data = ptraCreate(n); + for (i = 0; i < n; i++) { + if ((pixs = + pixacompGetPix(pixac, pixacompGetOffset(pixac) + i)) == NULL) { + L_ERROR("pix[%d] not retrieved\n", __func__, i); + continue; + } + if (pixGetWidth(pixs) == 1) { /* used sometimes as placeholders */ + L_INFO("placeholder image[%d] has w = 1\n", __func__, i); + pixDestroy(&pixs); + continue; + } + if (scalefactor != 1.0) + pix = pixScale(pixs, scalefactor, scalefactor); + else + pix = pixClone(pixs); + pixDestroy(&pixs); + scaledres = (l_int32)(res * scalefactor); + + /* Select the encoding type */ + if (type != L_DEFAULT_ENCODE) { + pagetype = type; + } else if (selectDefaultPdfEncoding(pix, &pagetype) != 0) { + L_ERROR("encoding type selection failed for pix[%d]\n", + __func__, i); + pixDestroy(&pix); + continue; + } + + ret = pixConvertToPdfData(pix, pagetype, quality, &imdata, &imbytes, + 0, 0, scaledres, title, NULL, 0); + pixDestroy(&pix); + if (ret) { + L_ERROR("pdf encoding failed for pix[%d]\n", __func__, i); + continue; + } + ba = l_byteaInitFromMem(imdata, imbytes); + LEPT_FREE(imdata); + ptraAdd(pa_data, ba); + } + ptraGetActualCount(pa_data, &n); + if (n == 0) { + L_ERROR("no pdf files made\n", __func__); + ptraDestroy(&pa_data, FALSE, FALSE); + return 1; + } + + /* Concatenate them */ + ret = ptraConcatenatePdfToData(pa_data, NULL, pdata, pnbytes); + + ptraGetActualCount(pa_data, &n); /* recalculate in case it changes */ + for (i = 0; i < n; i++) { + ba = (L_BYTEA *)ptraRemove(pa_data, i, L_NO_COMPACTION); + l_byteaDestroy(&ba); + } + ptraDestroy(&pa_data, FALSE, FALSE); + return ret; +} + + +/*! + * \brief pixacompFastConvertToPdfData() + * + * \param[in] pixac containing images all at the same resolution + * \param[in] title [optional] pdf title + * \param[out] pdata output pdf data (of all images + * \param[out] pnbytes size of output pdf data + * \return 0 if OK, 1 on error + * + * <pre> + * Notes: + * (1) This generates the pdf without transcoding if all the + * images in %pixac are compressed with jpeg. + * Images not jpeg compressed are skipped. + * (2) It assumes all images have the same resolution, and that + * the resolution embedded in each jpeg file is correct. + * </pre> + */ +l_ok +pixacompFastConvertToPdfData(PIXAC *pixac, + const char *title, + l_uint8 **pdata, + size_t *pnbytes) +{ +l_uint8 *imdata; +l_int32 i, n, ret, comptype; +size_t imbytes; +L_BYTEA *ba; +PIXC *pixc; +L_PTRA *pa_data; + + if (!pdata) + return ERROR_INT("&data not defined", __func__, 1); + *pdata = NULL; + if (!pnbytes) + return ERROR_INT("&nbytes not defined", __func__, 1); + *pnbytes = 0; + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 1); + + /* Generate all the encoded pdf strings */ + n = pixacompGetCount(pixac); + pa_data = ptraCreate(n); + for (i = 0; i < n; i++) { + if ((pixc = pixacompGetPixcomp(pixac, i, L_NOCOPY)) == NULL) { + L_ERROR("pixc[%d] not retrieved\n", __func__, i); + continue; + } + pixcompGetParameters(pixc, NULL, NULL, &comptype, NULL); + if (comptype != IFF_JFIF_JPEG) { + L_ERROR("pixc[%d] not jpeg compressed\n", __func__, i); + continue; + } + ret = pixcompFastConvertToPdfData(pixc, title, &imdata, &imbytes); + if (ret) { + L_ERROR("pdf encoding failed for pixc[%d]\n", __func__, i); + continue; + } + ba = l_byteaInitFromMem(imdata, imbytes); + LEPT_FREE(imdata); + ptraAdd(pa_data, ba); + } + ptraGetActualCount(pa_data, &n); + if (n == 0) { + L_ERROR("no pdf files made\n", __func__); + ptraDestroy(&pa_data, FALSE, FALSE); + return 1; + } + + /* Concatenate them */ + ret = ptraConcatenatePdfToData(pa_data, NULL, pdata, pnbytes); + + /* Clean up */ + ptraGetActualCount(pa_data, &n); /* recalculate in case it changes */ + for (i = 0; i < n; i++) { + ba = (L_BYTEA *)ptraRemove(pa_data, i, L_NO_COMPACTION); + l_byteaDestroy(&ba); + } + ptraDestroy(&pa_data, FALSE, FALSE); + return ret; +} + + +/*! + * \brief pixcompFastConvertToPdfData() + * + * \param[in] pixc containing images all at the same resolution + * \param[in] title [optional] pdf title + * \param[out] pdata output pdf data (of all images + * \param[out] pnbytes size of output pdf data + * \return 0 if OK, 1 on error + * + * <pre> + * Notes: + * (1) This generates the pdf without transcoding. + * (2) It assumes all images are jpeg encoded, have the same + * resolution, and that the resolution embedded in each + * jpeg file is correct. (It is transferred to the pdf + * via the cid.) + * </pre> + */ +static l_int32 +pixcompFastConvertToPdfData(PIXC *pixc, + const char *title, + l_uint8 **pdata, + size_t *pnbytes) +{ +l_uint8 *data; +L_COMP_DATA *cid; + + if (!pdata) + return ERROR_INT("&data not defined", __func__, 1); + *pdata = NULL; + if (!pnbytes) + return ERROR_INT("&nbytes not defined", __func__, 1); + *pnbytes = 0; + if (!pixc) + return ERROR_INT("pixc not defined", __func__, 1); + + /* Make a copy of the data */ + data = l_binaryCopy(pixc->data, pixc->size); + cid = l_generateJpegDataMem(data, pixc->size, 0); + + /* Note: cid is destroyed, along with data, by this function */ + return cidConvertToPdfData(cid, title, pdata, pnbytes); +} + + +/*--------------------------------------------------------------------* + * Output for debugging * + *--------------------------------------------------------------------*/ +/*! + * \brief pixacompWriteStreamInfo() + * + * \param[in] fp file stream + * \param[in] pixac + * \param[in] text [optional] identifying string; can be null + * \return 0 if OK, 1 on error + */ +l_ok +pixacompWriteStreamInfo(FILE *fp, + PIXAC *pixac, + const char *text) +{ +l_int32 i, n, nboxes; +PIXC *pixc; + + if (!fp) + return ERROR_INT("fp not defined", __func__, 1); + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 1); + + if (text) + fprintf(fp, "Pixacomp Info for %s:\n", text); + else + fprintf(fp, "Pixacomp Info:\n"); + n = pixacompGetCount(pixac); + nboxes = pixacompGetBoxaCount(pixac); + fprintf(fp, "Number of pixcomp: %d\n", n); + fprintf(fp, "Size of pixcomp array alloc: %d\n", pixac->nalloc); + fprintf(fp, "Offset of index into array: %d\n", pixac->offset); + if (nboxes > 0) + fprintf(fp, "Boxa has %d boxes\n", nboxes); + else + fprintf(fp, "Boxa is empty\n"); + for (i = 0; i < n; i++) { + pixc = pixacompGetPixcomp(pixac, pixac->offset + i, L_NOCOPY); + pixcompWriteStreamInfo(fp, pixc, NULL); + } + return 0; +} + + +/*! + * \brief pixcompWriteStreamInfo() + * + * \param[in] fp file stream + * \param[in] pixc + * \param[in] text [optional] identifying string; can be null + * \return 0 if OK, 1 on error + */ +l_ok +pixcompWriteStreamInfo(FILE *fp, + PIXC *pixc, + const char *text) +{ + if (!fp) + return ERROR_INT("fp not defined", __func__, 1); + if (!pixc) + return ERROR_INT("pixc not defined", __func__, 1); + + if (text) + fprintf(fp, " Pixcomp Info for %s:", text); + else + fprintf(fp, " Pixcomp Info:"); + fprintf(fp, " width = %d, height = %d, depth = %d\n", + pixc->w, pixc->h, pixc->d); + fprintf(fp, " xres = %d, yres = %d, size in bytes = %zu\n", + pixc->xres, pixc->yres, pixc->size); + if (pixc->cmapflag) + fprintf(fp, " has colormap\n"); + else + fprintf(fp, " no colormap\n"); + if (pixc->comptype < NumImageFileFormatExtensions) { + fprintf(fp, " comptype = %s (%d)\n", + ImageFileFormatExtensions[pixc->comptype], pixc->comptype); + } else { + fprintf(fp, " Error!! Invalid comptype index: %d\n", pixc->comptype); + } + return 0; +} + + +/*! + * \brief pixacompDisplayTiledAndScaled() + * + * \param[in] pixac + * \param[in] outdepth output depth: 1, 8 or 32 bpp + * \param[in] tilewidth each pix is scaled to this width + * \param[in] ncols number of tiles in each row + * \param[in] background 0 for white, 1 for black; this is the color + * of the spacing between the images + * \param[in] spacing between images, and on outside + * \param[in] border width of additional black border on each image; + * use 0 for no border + * \return pix of tiled images, or NULL on error + * + * <pre> + * Notes: + * (1) This is the same function as pixaDisplayTiledAndScaled(), + * except it works on a Pixacomp instead of a Pix. It is particularly + * useful for showing the images in a Pixacomp at reduced resolution. + * (2) See pixaDisplayTiledAndScaled() for details. + * </pre> + */ +PIX * +pixacompDisplayTiledAndScaled(PIXAC *pixac, + l_int32 outdepth, + l_int32 tilewidth, + l_int32 ncols, + l_int32 background, + l_int32 spacing, + l_int32 border) +{ +PIX *pixd; +PIXA *pixa; + + if (!pixac) + return (PIX *)ERROR_PTR("pixac not defined", __func__, NULL); + + if ((pixa = pixaCreateFromPixacomp(pixac, L_COPY)) == NULL) + return (PIX *)ERROR_PTR("pixa not made", __func__, NULL); + + pixd = pixaDisplayTiledAndScaled(pixa, outdepth, tilewidth, ncols, + background, spacing, border); + pixaDestroy(&pixa); + return pixd; +} + + +/*! + * \brief pixacompWriteFiles() + * + * \param[in] pixac + * \param[in] subdir subdirectory of /tmp + * \return 0 if OK, 1 on error + */ +l_ok +pixacompWriteFiles(PIXAC *pixac, + const char *subdir) +{ +char buf[128]; +l_int32 i, n; +PIXC *pixc; + + if (!pixac) + return ERROR_INT("pixac not defined", __func__, 1); + + if (lept_mkdir(subdir) > 0) + return ERROR_INT("invalid subdir", __func__, 1); + + n = pixacompGetCount(pixac); + for (i = 0; i < n; i++) { + pixc = pixacompGetPixcomp(pixac, i, L_NOCOPY); + snprintf(buf, sizeof(buf), "/tmp/%s/%03d", subdir, i); + pixcompWriteFile(buf, pixc); + } + return 0; +} + +extern const char *ImageFileFormatExtensions[]; + +/*! + * \brief pixcompWriteFile() + * + * \param[in] rootname + * \param[in] pixc + * \return 0 if OK, 1 on error + * + * <pre> + * Notes: + * (1) The compressed data is written to file, and the filename is + * generated by appending the format extension to %rootname. + * </pre> + */ +l_ok +pixcompWriteFile(const char *rootname, + PIXC *pixc) +{ +char buf[128]; + + if (!pixc) + return ERROR_INT("pixc not defined", __func__, 1); + + snprintf(buf, sizeof(buf), "%s.%s", rootname, + ImageFileFormatExtensions[pixc->comptype]); + l_binaryWrite(buf, "w", pixc->data, pixc->size); + return 0; +}