/* for sqrt() */
#include "allheaders.h"
/*---------------------------------------------------------------------*
* Pixa Display *
*---------------------------------------------------------------------*/
/*!
* \brief pixaDisplay()
*
* \param[in] pixa
* \param[in] w, h if set to 0, the size is determined from the
* bounding box of the components in pixa
* \return pix, or NULL on error
*
*
* Notes:
* (1) This uses the boxes to place each pix in the rendered composite.
* (2) Set w = h = 0 to use the b.b. of the components to determine
* the size of the returned pix.
* (3) Uses the first pix in pixa to determine the depth.
* (4) The background is written "white". On 1 bpp, each successive
* pix is "painted" (adding foreground), whereas for grayscale
* or color each successive pix is blitted with just the src.
* (5) If the pixa is empty, returns an empty 1 bpp pix.
*
*/
PIX *
pixaDisplay(PIXA *pixa,
l_int32 w,
l_int32 h)
{
l_int32 i, n, d, xb, yb, wb, hb, res;
BOXA *boxa;
PIX *pix1, *pixd;
PROCNAME("pixaDisplay");
if (!pixa)
return (PIX *)ERROR_PTR("pixa not defined", procName, NULL);
n = pixaGetCount(pixa);
if (n == 0 && w == 0 && h == 0)
return (PIX *)ERROR_PTR("no components; no size", procName, NULL);
if (n == 0) {
L_WARNING("no components; returning empty 1 bpp pix\n", procName);
return pixCreate(w, h, 1);
}
/* If w and h not input, determine the minimum size required
* to contain the origin and all c.c. */
if (w == 0 || h == 0) {
boxa = pixaGetBoxa(pixa, L_CLONE);
boxaGetExtent(boxa, &w, &h, NULL);
boxaDestroy(&boxa);
if (w == 0 || h == 0)
return (PIX *)ERROR_PTR("no associated boxa", procName, NULL);
}
/* Use the first pix in pixa to determine depth and resolution */
pix1 = pixaGetPix(pixa, 0, L_CLONE);
d = pixGetDepth(pix1);
res = pixGetXRes(pix1);
pixDestroy(&pix1);
if ((pixd = pixCreate(w, h, d)) == NULL)
return (PIX *)ERROR_PTR("pixd not made", procName, NULL);
pixSetResolution(pixd, res, res);
if (d > 1)
pixSetAll(pixd);
for (i = 0; i < n; i++) {
if (pixaGetBoxGeometry(pixa, i, &xb, &yb, &wb, &hb)) {
L_WARNING("no box found!\n", procName);
continue;
}
pix1 = pixaGetPix(pixa, i, L_CLONE);
if (d == 1)
pixRasterop(pixd, xb, yb, wb, hb, PIX_PAINT, pix1, 0, 0);
else
pixRasterop(pixd, xb, yb, wb, hb, PIX_SRC, pix1, 0, 0);
pixDestroy(&pix1);
}
return pixd;
}
/*!
* \brief pixaDisplayOnColor()
*
* \param[in] pixa
* \param[in] w, h if set to 0, the size is determined from the
* bounding box of the components in pixa
* \param[in] bgcolor background color to use
* \return pix, or NULL on error
*
*
* Notes:
* (1) This uses the boxes to place each pix in the rendered composite.
* (2) Set w = h = 0 to use the b.b. of the components to determine
* the size of the returned pix.
* (3) If any pix in %pixa are colormapped, or if the pix have
* different depths, it returns a 32 bpp pix. Otherwise,
* the depth of the returned pixa equals that of the pix in %pixa.
* (4) If the pixa is empty, return null.
*
*/
PIX *
pixaDisplayOnColor(PIXA *pixa,
l_int32 w,
l_int32 h,
l_uint32 bgcolor)
{
l_int32 i, n, xb, yb, wb, hb, hascmap, maxdepth, same, res;
BOXA *boxa;
PIX *pix1, *pix2, *pixd;
PIXA *pixat;
PROCNAME("pixaDisplayOnColor");
if (!pixa)
return (PIX *)ERROR_PTR("pixa not defined", procName, NULL);
if ((n = pixaGetCount(pixa)) == 0)
return (PIX *)ERROR_PTR("no components", procName, NULL);
/* If w and h are not input, determine the minimum size
* required to contain the origin and all c.c. */
if (w == 0 || h == 0) {
boxa = pixaGetBoxa(pixa, L_CLONE);
boxaGetExtent(boxa, &w, &h, NULL);
boxaDestroy(&boxa);
}
/* If any pix have colormaps, or if they have different depths,
* generate rgb */
pixaAnyColormaps(pixa, &hascmap);
pixaGetDepthInfo(pixa, &maxdepth, &same);
if (hascmap || !same) {
maxdepth = 32;
pixat = pixaCreate(n);
for (i = 0; i < n; i++) {
pix1 = pixaGetPix(pixa, i, L_CLONE);
pix2 = pixConvertTo32(pix1);
pixaAddPix(pixat, pix2, L_INSERT);
pixDestroy(&pix1);
}
} else {
pixat = pixaCopy(pixa, L_CLONE);
}
/* Make the output pix and set the background color */
if ((pixd = pixCreate(w, h, maxdepth)) == NULL) {
pixaDestroy(&pixat);
return (PIX *)ERROR_PTR("pixd not made", procName, NULL);
}
if ((maxdepth == 1 && bgcolor > 0) ||
(maxdepth == 2 && bgcolor >= 0x3) ||
(maxdepth == 4 && bgcolor >= 0xf) ||
(maxdepth == 8 && bgcolor >= 0xff) ||
(maxdepth == 16 && bgcolor >= 0xffff) ||
(maxdepth == 32 && bgcolor >= 0xffffff00)) {
pixSetAll(pixd);
} else if (bgcolor > 0) {
pixSetAllArbitrary(pixd, bgcolor);
}
/* Blit each pix into its place */
for (i = 0; i < n; i++) {
if (pixaGetBoxGeometry(pixat, i, &xb, &yb, &wb, &hb)) {
L_WARNING("no box found!\n", procName);
continue;
}
pix1 = pixaGetPix(pixat, i, L_CLONE);
if (i == 0) res = pixGetXRes(pix1);
pixRasterop(pixd, xb, yb, wb, hb, PIX_SRC, pix1, 0, 0);
pixDestroy(&pix1);
}
pixSetResolution(pixd, res, res);
pixaDestroy(&pixat);
return pixd;
}
/*!
* \brief pixaDisplayRandomCmap()
*
* \param[in] pixa 1 bpp regions, with boxa delineating those regions
* \param[in] w, h if set to 0, the size is determined from the
* bounding box of the components in pixa
* \return pix 8 bpp, cmapped, with random colors assigned to each region,
* or NULL on error.
*
*
* Notes:
* (1) This uses the boxes to place each pix in the rendered composite.
* The fg of each pix in %pixa, such as a single connected
* component or a line of text, is given a random color.
* (2) By default, the background color is black (cmap index 0).
* This can be changed by pixcmapResetColor()
*
*/
PIX *
pixaDisplayRandomCmap(PIXA *pixa,
l_int32 w,
l_int32 h)
{
l_int32 i, n, same, maxd, index, xb, yb, wb, hb, res;
BOXA *boxa;
PIX *pixs, *pix1, *pixd;
PIXCMAP *cmap;
PROCNAME("pixaDisplayRandomCmap");
if (!pixa)
return (PIX *)ERROR_PTR("pixa not defined", procName, NULL);
if ((n = pixaGetCount(pixa)) == 0)
return (PIX *)ERROR_PTR("no components", procName, NULL);
pixaVerifyDepth(pixa, &same, &maxd);
if (maxd > 1)
return (PIX *)ERROR_PTR("not all components are 1 bpp", procName, NULL);
/* If w and h are not input, determine the minimum size required
* to contain the origin and all c.c. */
if (w == 0 || h == 0) {
boxa = pixaGetBoxa(pixa, L_CLONE);
boxaGetExtent(boxa, &w, &h, NULL);
boxaDestroy(&boxa);
}
/* Set up an 8 bpp dest pix, with a colormap with 254 random colors */
if ((pixd = pixCreate(w, h, 8)) == NULL)
return (PIX *)ERROR_PTR("pixd not made", procName, NULL);
cmap = pixcmapCreateRandom(8, 1, 1);
pixSetColormap(pixd, cmap);
/* Color each component and blit it in */
for (i = 0; i < n; i++) {
index = 1 + (i % 254);
pixaGetBoxGeometry(pixa, i, &xb, &yb, &wb, &hb);
pixs = pixaGetPix(pixa, i, L_CLONE);
if (i == 0) res = pixGetXRes(pixs);
pix1 = pixConvert1To8(NULL, pixs, 0, index);
pixRasterop(pixd, xb, yb, wb, hb, PIX_PAINT, pix1, 0, 0);
pixDestroy(&pixs);
pixDestroy(&pix1);
}
pixSetResolution(pixd, res, res);
return pixd;
}
/*!
* \brief pixaDisplayLinearly()
*
* \param[in] pixas
* \param[in] direction L_HORIZ or L_VERT
* \param[in] scalefactor applied to every pix; use 1.0 for no scaling
* \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 black border added to each image;
* use 0 for no border
* \param[out] pboxa [optional] location of images in output pix
* \return pix of composite images, or NULL on error
*
*
* Notes:
* (1) This puts each pix, sequentially, in a line, either horizontally
* or vertically.
* (2) If any pix has a colormap, all pix are rendered in rgb.
* (3) The boxa gives the location of each image.
*
*/
PIX *
pixaDisplayLinearly(PIXA *pixas,
l_int32 direction,
l_float32 scalefactor,
l_int32 background, /* not used */
l_int32 spacing,
l_int32 border,
BOXA **pboxa)
{
l_int32 i, n, x, y, w, h, size, depth, bordval;
BOX *box;
PIX *pix1, *pix2, *pix3, *pixd;
PIXA *pixa1, *pixa2;
PROCNAME("pixaDisplayLinearly");
if (pboxa) *pboxa = NULL;
if (!pixas)
return (PIX *)ERROR_PTR("pixas not defined", procName, NULL);
if (direction != L_HORIZ && direction != L_VERT)
return (PIX *)ERROR_PTR("invalid direction", procName, NULL);
/* Make sure all pix are at the same depth */
pixa1 = pixaConvertToSameDepth(pixas);
pixaGetDepthInfo(pixa1, &depth, NULL);
/* Scale and add border if requested */
n = pixaGetCount(pixa1);
pixa2 = pixaCreate(n);
bordval = (depth == 1) ? 1 : 0;
size = (n - 1) * spacing;
x = y = 0;
for (i = 0; i < n; i++) {
if ((pix1 = pixaGetPix(pixa1, i, L_CLONE)) == NULL) {
L_WARNING("missing pix at index %d\n", procName, i);
continue;
}
if (scalefactor != 1.0)
pix2 = pixScale(pix1, scalefactor, scalefactor);
else
pix2 = pixClone(pix1);
if (border)
pix3 = pixAddBorder(pix2, border, bordval);
else
pix3 = pixClone(pix2);
pixGetDimensions(pix3, &w, &h, NULL);
box = boxCreate(x, y, w, h);
if (direction == L_HORIZ) {
size += w;
x += w + spacing;
} else { /* vertical */
size += h;
y += h + spacing;
}
pixaAddPix(pixa2, pix3, L_INSERT);
pixaAddBox(pixa2, box, L_INSERT);
pixDestroy(&pix1);
pixDestroy(&pix2);
}
pixd = pixaDisplay(pixa2, 0, 0);
if (pboxa)
*pboxa = pixaGetBoxa(pixa2, L_COPY);
pixaDestroy(&pixa1);
pixaDestroy(&pixa2);
return pixd;
}
/*!
* \brief pixaDisplayOnLattice()
*
* \param[in] pixa
* \param[in] cellw lattice cell width
* \param[in] cellh lattice cell height
* \param[out] pncols [optional] number of columns in output lattice
* \param[out] pboxa [optional] location of images in lattice
* \return pix of composite images, or NULL on error
*
*
* Notes:
* (1) This places each pix on sequentially on a regular lattice
* in the rendered composite. If a pix is too large to fit in the
* allocated lattice space, it is not rendered.
* (2) If any pix has a colormap, all pix are rendered in rgb.
* (3) This is useful when putting bitmaps of components,
* such as characters, into a single image.
* (4) The boxa gives the location of each image. The UL corner
* of each image is on a lattice cell corner. Omitted images
* (due to size) are assigned an invalid width and height of 0.
*
*/
PIX *
pixaDisplayOnLattice(PIXA *pixa,
l_int32 cellw,
l_int32 cellh,
l_int32 *pncols,
BOXA **pboxa)
{
l_int32 n, nw, nh, w, h, d, wt, ht, res;
l_int32 index, i, j, hascmap;
BOX *box;
BOXA *boxa;
PIX *pix1, *pix2, *pixd;
PIXA *pixa1;
PROCNAME("pixaDisplayOnLattice");
if (pncols) *pncols = 0;
if (pboxa) *pboxa = NULL;
if (!pixa)
return (PIX *)ERROR_PTR("pixa not defined", procName, NULL);
/* If any pix have colormaps, generate rgb */
if ((n = pixaGetCount(pixa)) == 0)
return (PIX *)ERROR_PTR("no components", procName, NULL);
pix1 = pixaGetPix(pixa, 0, L_CLONE);
res = pixGetXRes(pix1);
pixDestroy(&pix1);
pixaAnyColormaps(pixa, &hascmap);
if (hascmap) {
pixa1 = pixaCreate(n);
for (i = 0; i < n; i++) {
pix1 = pixaGetPix(pixa, i, L_CLONE);
pix2 = pixConvertTo32(pix1);
pixaAddPix(pixa1, pix2, L_INSERT);
pixDestroy(&pix1);
}
} else {
pixa1 = pixaCopy(pixa, L_CLONE);
}
boxa = boxaCreate(n);
/* Have number of rows and columns approximately equal */
nw = (l_int32)sqrt((l_float64)n);
nh = (n + nw - 1) / nw;
w = cellw * nw;
h = cellh * nh;
/* Use the first pix in pixa to determine the output depth. */
pixaGetPixDimensions(pixa1, 0, NULL, NULL, &d);
if ((pixd = pixCreate(w, h, d)) == NULL) {
pixaDestroy(&pixa1);
return (PIX *)ERROR_PTR("pixd not made", procName, NULL);
}
pixSetBlackOrWhite(pixd, L_SET_WHITE);
pixSetResolution(pixd, res, res);
/* Tile the output */
index = 0;
for (i = 0; i < nh; i++) {
for (j = 0; j < nw && index < n; j++, index++) {
pix1 = pixaGetPix(pixa1, index, L_CLONE);
pixGetDimensions(pix1, &wt, &ht, NULL);
if (wt > cellw || ht > cellh) {
L_INFO("pix(%d) omitted; size %dx%x\n", procName, index,
wt, ht);
box = boxCreate(0, 0, 0, 0);
boxaAddBox(boxa, box, L_INSERT);
pixDestroy(&pix1);
continue;
}
pixRasterop(pixd, j * cellw, i * cellh, wt, ht,
PIX_SRC, pix1, 0, 0);
box = boxCreate(j * cellw, i * cellh, wt, ht);
boxaAddBox(boxa, box, L_INSERT);
pixDestroy(&pix1);
}
}
if (pncols) *pncols = nw;
if (pboxa)
*pboxa = boxa;
else
boxaDestroy(&boxa);
pixaDestroy(&pixa1);
return pixd;
}
/*!
* \brief pixaDisplayUnsplit()
*
* \param[in] pixa
* \param[in] nx number of mosaic cells horizontally
* \param[in] ny number of mosaic cells vertically
* \param[in] borderwidth of added border on all sides
* \param[in] bordercolor in our RGBA format: 0xrrggbbaa
* \return pix of tiled images, or NULL on error
*
*
* Notes:
* (1) This is a logical inverse of pixaSplitPix(). It
* constructs a pix from a mosaic of tiles, all of equal size.
* (2) For added generality, a border of arbitrary color can
* be added to each of the tiles.
* (3) In use, pixa will typically have either been generated
* from pixaSplitPix() or will derived from a pixa that
* was so generated.
* (4) All pix in the pixa must be of equal depth, and, if
* colormapped, have the same colormap.
*
*/
PIX *
pixaDisplayUnsplit(PIXA *pixa,
l_int32 nx,
l_int32 ny,
l_int32 borderwidth,
l_uint32 bordercolor)
{
l_int32 w, h, d, wt, ht;
l_int32 i, j, k, x, y, n;
PIX *pix1, *pixd;
PROCNAME("pixaDisplayUnsplit");
if (!pixa)
return (PIX *)ERROR_PTR("pixa not defined", procName, NULL);
if (nx <= 0 || ny <= 0)
return (PIX *)ERROR_PTR("nx and ny must be > 0", procName, NULL);
if ((n = pixaGetCount(pixa)) == 0)
return (PIX *)ERROR_PTR("no components", procName, NULL);
if (n != nx * ny)
return (PIX *)ERROR_PTR("n != nx * ny", procName, NULL);
borderwidth = L_MAX(0, borderwidth);
pixaGetPixDimensions(pixa, 0, &wt, &ht, &d);
w = nx * (wt + 2 * borderwidth);
h = ny * (ht + 2 * borderwidth);
if ((pixd = pixCreate(w, h, d)) == NULL)
return (PIX *)ERROR_PTR("pixd not made", procName, NULL);
pix1 = pixaGetPix(pixa, 0, L_CLONE);
pixCopyColormap(pixd, pix1);
pixDestroy(&pix1);
if (borderwidth > 0)
pixSetAllArbitrary(pixd, bordercolor);
y = borderwidth;
for (i = 0, k = 0; i < ny; i++) {
x = borderwidth;
for (j = 0; j < nx; j++, k++) {
pix1 = pixaGetPix(pixa, k, L_CLONE);
pixRasterop(pixd, x, y, wt, ht, PIX_SRC, pix1, 0, 0);
pixDestroy(&pix1);
x += wt + 2 * borderwidth;
}
y += ht + 2 * borderwidth;
}
return pixd;
}
/*!
* \brief pixaDisplayTiled()
*
* \param[in] pixa
* \param[in] maxwidth of output image
* \param[in] background 0 for white, 1 for black
* \param[in] spacing
* \return pix of tiled images, or NULL on error
*
*
* Notes:
* (1) This renders a pixa to a single image of width not to
* exceed maxwidth, with background color either white or black,
* and with each subimage spaced on a regular lattice.
* (2) The lattice size is determined from the largest width and height,
* separately, of all pix in the pixa.
* (3) All pix in the pixa must be of equal depth.
* (4) If any pix has a colormap, all pix are rendered in rgb.
* (5) Careful: because no components are omitted, this is
* dangerous if there are thousands of small components and
* one or more very large one, because the size of the
* resulting pix can be huge!
*
*/
PIX *
pixaDisplayTiled(PIXA *pixa,
l_int32 maxwidth,
l_int32 background,
l_int32 spacing)
{
l_int32 wmax, hmax, wd, hd, d, hascmap, res, same;
l_int32 i, j, n, ni, ncols, nrows;
l_int32 ystart, xstart, wt, ht;
PIX *pix1, *pix2, *pixd;
PIXA *pixa1;
PROCNAME("pixaDisplayTiled");
if (!pixa)
return (PIX *)ERROR_PTR("pixa not defined", procName, NULL);
/* If any pix have colormaps, generate rgb */
if ((n = pixaGetCount(pixa)) == 0)
return (PIX *)ERROR_PTR("no components", procName, NULL);
pixaAnyColormaps(pixa, &hascmap);
if (hascmap) {
pixa1 = pixaCreate(n);
for (i = 0; i < n; i++) {
pix1 = pixaGetPix(pixa, i, L_CLONE);
pix2 = pixConvertTo32(pix1);
pixaAddPix(pixa1, pix2, L_INSERT);
pixDestroy(&pix1);
}
} else {
pixa1 = pixaCopy(pixa, L_CLONE);
}
/* Find the max dimensions and depth subimages */
pixaGetDepthInfo(pixa1, &d, &same);
if (!same) {
pixaDestroy(&pixa1);
return (PIX *)ERROR_PTR("depths not equal", procName, NULL);
}
pixaSizeRange(pixa1, NULL, NULL, &wmax, &hmax);
/* Get the number of rows and columns and the output image size */
spacing = L_MAX(spacing, 0);
ncols = (l_int32)((l_float32)(maxwidth - spacing) /
(l_float32)(wmax + spacing));
ncols = L_MAX(ncols, 1);
nrows = (n + ncols - 1) / ncols;
wd = wmax * ncols + spacing * (ncols + 1);
hd = hmax * nrows + spacing * (nrows + 1);
if ((pixd = pixCreate(wd, hd, d)) == NULL) {
pixaDestroy(&pixa1);
return (PIX *)ERROR_PTR("pixd not made", procName, NULL);
}
/* Reset the background color if necessary */
if ((background == 1 && d == 1) || (background == 0 && d != 1))
pixSetAll(pixd);
/* Blit the images to the dest */
for (i = 0, ni = 0; i < nrows; i++) {
ystart = spacing + i * (hmax + spacing);
for (j = 0; j < ncols && ni < n; j++, ni++) {
xstart = spacing + j * (wmax + spacing);
pix1 = pixaGetPix(pixa1, ni, L_CLONE);
if (ni == 0) res = pixGetXRes(pix1);
pixGetDimensions(pix1, &wt, &ht, NULL);
pixRasterop(pixd, xstart, ystart, wt, ht, PIX_SRC, pix1, 0, 0);
pixDestroy(&pix1);
}
}
pixSetResolution(pixd, res, res);
pixaDestroy(&pixa1);
return pixd;
}
/*!
* \brief pixaDisplayTiledInRows()
*
* \param[in] pixa
* \param[in] outdepth output depth: 1, 8 or 32 bpp
* \param[in] maxwidth of output image
* \param[in] scalefactor applied to every pix; use 1.0 for no scaling
* \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 black border added to each image;
* use 0 for no border
* \return pixd of tiled images, or NULL on error
*
*
* Notes:
* (1) This renders a pixa to a single image of width not to
* exceed maxwidth, with background color either white or black,
* and with each row tiled such that the top of each pix is
* aligned and separated by 'spacing' from the next one.
* A black border can be added to each pix.
* (2) All pix are converted to outdepth; existing colormaps are removed.
* (3) This does a reasonably spacewise-efficient job of laying
* out the individual pix images into a tiled composite.
* (4) A serialized boxa giving the location in pixd of each input
* pix (without added border) is stored in the text string of pixd.
* This allows, e.g., regeneration of a pixa from pixd, using
* pixaCreateFromBoxa(). If there is no scaling and the depth of
* each input pix in the pixa is the same, this tiling operation
* can be inverted using the boxa (except for loss of text in
* each of the input pix):
* pix1 = pixaDisplayTiledInRows(pixa1, 1, 1500, 1.0, 0, 30, 0);
* char *boxatxt = pixGetText(pix1);
* boxa1 = boxaReadMem((l_uint8 *)boxatxt, strlen(boxatxt));
* pixa2 = pixaCreateFromBoxa(pix1, boxa1, NULL);
*
*/
PIX *
pixaDisplayTiledInRows(PIXA *pixa,
l_int32 outdepth,
l_int32 maxwidth,
l_float32 scalefactor,
l_int32 background,
l_int32 spacing,
l_int32 border)
{
l_int32 h; /* cumulative height over all the rows */
l_int32 w; /* cumulative height in the current row */
l_int32 bordval, wtry, wt, ht;
l_int32 irow; /* index of current pix in current row */
l_int32 wmaxrow; /* width of the largest row */
l_int32 maxh; /* max height in row */
l_int32 i, j, index, n, x, y, nrows, ninrow, res;
size_t size;
l_uint8 *data;
BOXA *boxa;
NUMA *nainrow; /* number of pix in the row */
NUMA *namaxh; /* height of max pix in the row */
PIX *pix, *pixn, *pix1, *pixd;
PIXA *pixan;
PROCNAME("pixaDisplayTiledInRows");
if (!pixa)
return (PIX *)ERROR_PTR("pixa not defined", procName, NULL);
if (outdepth != 1 && outdepth != 8 && outdepth != 32)
return (PIX *)ERROR_PTR("outdepth not in {1, 8, 32}", procName, NULL);
if (border < 0)
border = 0;
if (scalefactor <= 0.0) scalefactor = 1.0;
if ((n = pixaGetCount(pixa)) == 0)
return (PIX *)ERROR_PTR("no components", procName, NULL);
/* Normalize depths, scale, remove colormaps; optionally add border */
pixan = pixaCreate(n);
bordval = (outdepth == 1) ? 1 : 0;
for (i = 0; i < n; i++) {
if ((pix = pixaGetPix(pixa, i, L_CLONE)) == NULL)
continue;
if (outdepth == 1)
pixn = pixConvertTo1(pix, 128);
else if (outdepth == 8)
pixn = pixConvertTo8(pix, FALSE);
else /* outdepth == 32 */
pixn = pixConvertTo32(pix);
pixDestroy(&pix);
if (scalefactor != 1.0)
pix1 = pixScale(pixn, scalefactor, scalefactor);
else
pix1 = pixClone(pixn);
if (border)
pixd = pixAddBorder(pix1, border, bordval);
else
pixd = pixClone(pix1);
pixDestroy(&pixn);
pixDestroy(&pix1);
pixaAddPix(pixan, pixd, L_INSERT);
}
if (pixaGetCount(pixan) != n) {
n = pixaGetCount(pixan);
L_WARNING("only got %d components\n", procName, n);
if (n == 0) {
pixaDestroy(&pixan);
return (PIX *)ERROR_PTR("no components", procName, NULL);
}
}
/* Compute parameters for layout */
nainrow = numaCreate(0);
namaxh = numaCreate(0);
wmaxrow = 0;
w = h = spacing;
maxh = 0; /* max height in row */
for (i = 0, irow = 0; i < n; i++, irow++) {
pixaGetPixDimensions(pixan, i, &wt, &ht, NULL);
wtry = w + wt + spacing;
if (wtry > maxwidth) { /* end the current row and start next one */
numaAddNumber(nainrow, irow);
numaAddNumber(namaxh, maxh);
wmaxrow = L_MAX(wmaxrow, w);
h += maxh + spacing;
irow = 0;
w = wt + 2 * spacing;
maxh = ht;
} else {
w = wtry;
maxh = L_MAX(maxh, ht);
}
}
/* Enter the parameters for the last row */
numaAddNumber(nainrow, irow);
numaAddNumber(namaxh, maxh);
wmaxrow = L_MAX(wmaxrow, w);
h += maxh + spacing;
if ((pixd = pixCreate(wmaxrow, h, outdepth)) == NULL) {
numaDestroy(&nainrow);
numaDestroy(&namaxh);
pixaDestroy(&pixan);
return (PIX *)ERROR_PTR("pixd not made", procName, NULL);
}
/* Reset the background color if necessary */
if ((background == 1 && outdepth == 1) ||
(background == 0 && outdepth != 1))
pixSetAll(pixd);
/* Blit the images to the dest, and save the boxa identifying
* the image regions that do not include the borders. */
nrows = numaGetCount(nainrow);
y = spacing;
boxa = boxaCreate(n);
for (i = 0, index = 0; i < nrows; i++) { /* over rows */
numaGetIValue(nainrow, i, &ninrow);
numaGetIValue(namaxh, i, &maxh);
x = spacing;
for (j = 0; j < ninrow; j++, index++) { /* over pix in row */
pix = pixaGetPix(pixan, index, L_CLONE);
if (index == 0) {
res = pixGetXRes(pix);
pixSetResolution(pixd, res, res);
}
pixGetDimensions(pix, &wt, &ht, NULL);
boxaAddBox(boxa, boxCreate(x + border, y + border,
wt - 2 * border, ht - 2 *border), L_INSERT);
pixRasterop(pixd, x, y, wt, ht, PIX_SRC, pix, 0, 0);
pixDestroy(&pix);
x += wt + spacing;
}
y += maxh + spacing;
}
boxaWriteMem(&data, &size, boxa);
pixSetText(pixd, (char *)data); /* data is ascii */
LEPT_FREE(data);
boxaDestroy(&boxa);
numaDestroy(&nainrow);
numaDestroy(&namaxh);
pixaDestroy(&pixan);
return pixd;
}
/*!
* \brief pixaDisplayTiledInColumns()
*
* \param[in] pixas
* \param[in] nx number of columns in output image
* \param[in] scalefactor applied to every pix; use 1.0 for no scaling
* \param[in] spacing between images, and on outside
* \param[in] border width of black border added to each image;
* use 0 for no border
* \return pixd of tiled images, or NULL on error
*
*
* Notes:
* (1) This renders a pixa to a single image with &nx columns of
* subimages. The background color is white, and each row
* is tiled such that the top of each pix is aligned and
* each pix is separated by 'spacing' from the next one.
* A black border can be added to each pix.
* (2) The output depth is determined by the largest depth
* required by the pix in the pixa. Colormaps are removed.
* (3) A serialized boxa giving the location in pixd of each input
* pix (without added border) is stored in the text string of pixd.
* This allows, e.g., regeneration of a pixa from pixd, using
* pixaCreateFromBoxa(). If there is no scaling and the depth of
* each input pix in the pixa is the same, this tiling operation
* can be inverted using the boxa (except for loss of text in
* each of the input pix):
* pix1 = pixaDisplayTiledInColumns(pixa1, 3, 1.0, 0, 30, 2);
* char *boxatxt = pixGetText(pix1);
* boxa1 = boxaReadMem((l_uint8 *)boxatxt, strlen(boxatxt));
* pixa2 = pixaCreateFromBoxa(pix1, boxa1, NULL);
*
*/
PIX *
pixaDisplayTiledInColumns(PIXA *pixas,
l_int32 nx,
l_float32 scalefactor,
l_int32 spacing,
l_int32 border)
{
l_int32 i, j, index, n, x, y, nrows, wb, hb, w, h, maxd, maxh, bordval, res;
size_t size;
l_uint8 *data;
BOX *box;
BOXA *boxa;
PIX *pix1, *pix2, *pix3, *pixd;
PIXA *pixa1, *pixa2;
PROCNAME("pixaDisplayTiledInColumns");
if (!pixas)
return (PIX *)ERROR_PTR("pixas not defined", procName, NULL);
if (border < 0)
border = 0;
if (scalefactor <= 0.0) scalefactor = 1.0;
if ((n = pixaGetCount(pixas)) == 0)
return (PIX *)ERROR_PTR("no components", procName, NULL);
/* Convert to same depth, if necessary */
pixa1 = pixaConvertToSameDepth(pixas);
pixaGetDepthInfo(pixa1, &maxd, NULL);
/* Scale and optionally add border */
pixa2 = pixaCreate(n);
bordval = (maxd == 1) ? 1 : 0;
for (i = 0; i < n; i++) {
if ((pix1 = pixaGetPix(pixa1, i, L_CLONE)) == NULL)
continue;
if (scalefactor != 1.0)
pix2 = pixScale(pix1, scalefactor, scalefactor);
else
pix2 = pixClone(pix1);
if (border)
pix3 = pixAddBorder(pix2, border, bordval);
else
pix3 = pixClone(pix2);
if (i == 0) res = pixGetXRes(pix3);
pixaAddPix(pixa2, pix3, L_INSERT);
pixDestroy(&pix1);
pixDestroy(&pix2);
}
pixaDestroy(&pixa1);
if (pixaGetCount(pixa2) != n) {
n = pixaGetCount(pixa2);
L_WARNING("only got %d components\n", procName, n);
if (n == 0) {
pixaDestroy(&pixa2);
return (PIX *)ERROR_PTR("no components", procName, NULL);
}
}
/* Compute layout parameters and save as a boxa */
boxa = boxaCreate(n);
nrows = (n + nx - 1) / nx;
y = spacing;
for (i = 0, index = 0; i < nrows; i++) {
x = spacing;
maxh = 0;
for (j = 0; j < nx && index < n; j++) {
pixaGetPixDimensions(pixa2, index, &wb, &hb, NULL);
box = boxCreate(x, y, wb, hb);
boxaAddBox(boxa, box, L_INSERT);
maxh = L_MAX(maxh, hb + spacing);
x += wb + spacing;
index++;
}
y += maxh;
}
pixaSetBoxa(pixa2, boxa, L_INSERT);
/* Render the output pix */
boxaGetExtent(boxa, &w, &h, NULL);
pixd = pixaDisplay(pixa2, w + spacing, h + spacing);
pixSetResolution(pixd, res, res);
/* Save the boxa in the text field of the output pix */
boxaWriteMem(&data, &size, boxa);
pixSetText(pixd, (char *)data); /* data is ascii */
LEPT_FREE(data);
pixaDestroy(&pixa2);
return pixd;
}
/*!
* \brief pixaDisplayTiledAndScaled()
*
* \param[in] pixa
* \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
*
*
* Notes:
* (1) This can be used to tile a number of renderings of
* an image that are at different scales and depths.
* (2) Each image, after scaling and optionally adding the
* black border, has width 'tilewidth'. Thus, the border does
* not affect the spacing between the image tiles. The
* maximum allowed border width is tilewidth / 5.
*
*/
PIX *
pixaDisplayTiledAndScaled(PIXA *pixa,
l_int32 outdepth,
l_int32 tilewidth,
l_int32 ncols,
l_int32 background,
l_int32 spacing,
l_int32 border)
{
l_int32 x, y, w, h, wd, hd, d, res;
l_int32 i, n, nrows, maxht, ninrow, irow, bordval;
l_int32 *rowht;
l_float32 scalefact;
PIX *pix, *pixn, *pix1, *pixb, *pixd;
PIXA *pixan;
PROCNAME("pixaDisplayTiledAndScaled");
if (!pixa)
return (PIX *)ERROR_PTR("pixa not defined", procName, NULL);
if (outdepth != 1 && outdepth != 8 && outdepth != 32)
return (PIX *)ERROR_PTR("outdepth not in {1, 8, 32}", procName, NULL);
if (ncols <= 0)
return (PIX *)ERROR_PTR("ncols must be > 0", procName, NULL);
if (border < 0 || border > tilewidth / 5)
border = 0;
if ((n = pixaGetCount(pixa)) == 0)
return (PIX *)ERROR_PTR("no components", procName, NULL);
/* Normalize scale and depth for each pix; optionally add border */
pixan = pixaCreate(n);
bordval = (outdepth == 1) ? 1 : 0;
for (i = 0; i < n; i++) {
if ((pix = pixaGetPix(pixa, i, L_CLONE)) == NULL)
continue;
pixGetDimensions(pix, &w, &h, &d);
scalefact = (l_float32)(tilewidth - 2 * border) / (l_float32)w;
if (d == 1 && outdepth > 1 && scalefact < 1.0)
pix1 = pixScaleToGray(pix, scalefact);
else
pix1 = pixScale(pix, scalefact, scalefact);
if (outdepth == 1)
pixn = pixConvertTo1(pix1, 128);
else if (outdepth == 8)
pixn = pixConvertTo8(pix1, FALSE);
else /* outdepth == 32 */
pixn = pixConvertTo32(pix1);
pixDestroy(&pix1);
if (border)
pixb = pixAddBorder(pixn, border, bordval);
else
pixb = pixClone(pixn);
pixaAddPix(pixan, pixb, L_INSERT);
pixDestroy(&pix);
pixDestroy(&pixn);
}
if ((n = pixaGetCount(pixan)) == 0) { /* should not have changed! */
pixaDestroy(&pixan);
return (PIX *)ERROR_PTR("no components", procName, NULL);
}
/* Determine the size of each row and of pixd */
wd = tilewidth * ncols + spacing * (ncols + 1);
nrows = (n + ncols - 1) / ncols;
if ((rowht = (l_int32 *)LEPT_CALLOC(nrows, sizeof(l_int32))) == NULL) {
pixaDestroy(&pixan);
return (PIX *)ERROR_PTR("rowht array not made", procName, NULL);
}
maxht = 0;
ninrow = 0;
irow = 0;
for (i = 0; i < n; i++) {
pix = pixaGetPix(pixan, i, L_CLONE);
ninrow++;
pixGetDimensions(pix, &w, &h, NULL);
maxht = L_MAX(h, maxht);
if (ninrow == ncols) {
rowht[irow] = maxht;
maxht = ninrow = 0; /* reset */
irow++;
}
pixDestroy(&pix);
}
if (ninrow > 0) { /* last fencepost */
rowht[irow] = maxht;
irow++; /* total number of rows */
}
nrows = irow;
hd = spacing * (nrows + 1);
for (i = 0; i < nrows; i++)
hd += rowht[i];
pixd = pixCreate(wd, hd, outdepth);
if ((background == 1 && outdepth == 1) ||
(background == 0 && outdepth != 1))
pixSetAll(pixd);
/* Now blit images to pixd */
x = y = spacing;
irow = 0;
for (i = 0; i < n; i++) {
pix = pixaGetPix(pixan, i, L_CLONE);
if (i == 0) {
res = pixGetXRes(pix);
pixSetResolution(pixd, res, res);
}
pixGetDimensions(pix, &w, &h, NULL);
if (i && ((i % ncols) == 0)) { /* start new row */
x = spacing;
y += spacing + rowht[irow];
irow++;
}
pixRasterop(pixd, x, y, w, h, PIX_SRC, pix, 0, 0);
x += tilewidth + spacing;
pixDestroy(&pix);
}
pixaDestroy(&pixan);
LEPT_FREE(rowht);
return pixd;
}
/*!
* \brief pixaDisplayTiledWithText()
*
* \param[in] pixa
* \param[in] maxwidth of output image
* \param[in] scalefactor applied to every pix; use 1.0 for no scaling
* \param[in] spacing between images, and on outside
* \param[in] border width of black border added to each image;
* use 0 for no border
* \param[in] fontsize 4, 6, ... 20
* \param[in] textcolor 0xrrggbb00
* \return pixd of tiled images, or NULL on error
*
*
* Notes:
* (1) This is a version of pixaDisplayTiledInRows() that prints, below
* each pix, the text in the pix text field. Up to 127 chars
* of text in the pix text field are rendered below each pix.
* (2) It renders a pixa to a single image of width not to
* exceed %maxwidth, with white background color, with each row
* tiled such that the top of each pix is aligned and separated
* by %spacing from the next one.
* (3) All pix are converted to 32 bpp.
* (4) This does a reasonably spacewise-efficient job of laying
* out the individual pix images into a tiled composite.
*
*/
PIX *
pixaDisplayTiledWithText(PIXA *pixa,
l_int32 maxwidth,
l_float32 scalefactor,
l_int32 spacing,
l_int32 border,
l_int32 fontsize,
l_uint32 textcolor)
{
char buf[128];
char *textstr;
l_int32 i, n, maxw;
L_BMF *bmf;
PIX *pix1, *pix2, *pix3, *pix4, *pixd;
PIXA *pixad;
PROCNAME("pixaDisplayTiledWithText");
if (!pixa)
return (PIX *)ERROR_PTR("pixa not defined", procName, NULL);
if ((n = pixaGetCount(pixa)) == 0)
return (PIX *)ERROR_PTR("no components", procName, NULL);
if (maxwidth <= 0)
return (PIX *)ERROR_PTR("invalid maxwidth", procName, NULL);
if (border < 0)
border = 0;
if (scalefactor <= 0.0) {
L_WARNING("invalid scalefactor; setting to 1.0\n", procName);
scalefactor = 1.0;
}
if (fontsize < 4 || fontsize > 20 || (fontsize & 1)) {
l_int32 fsize = L_MAX(L_MIN(fontsize, 20), 4);
if (fsize & 1) fsize--;
L_WARNING("changed fontsize from %d to %d\n", procName,
fontsize, fsize);
fontsize = fsize;
}
/* Be sure the width can accommodate a single column of images */
pixaSizeRange(pixa, NULL, NULL, &maxw, NULL);
maxwidth = L_MAX(maxwidth, scalefactor * (maxw + 2 * spacing + 2 * border));
bmf = bmfCreate(NULL, fontsize);
pixad = pixaCreate(n);
for (i = 0; i < n; i++) {
pix1 = pixaGetPix(pixa, i, L_CLONE);
pix2 = pixConvertTo32(pix1);
pix3 = pixAddBorderGeneral(pix2, spacing, spacing, spacing,
spacing, 0xffffff00);
textstr = pixGetText(pix1);
if (textstr && strlen(textstr) > 0) {
snprintf(buf, sizeof(buf), "%s", textstr);
pix4 = pixAddSingleTextblock(pix3, bmf, buf, textcolor,
L_ADD_BELOW, NULL);
} else {
pix4 = pixClone(pix3);
}
pixaAddPix(pixad, pix4, L_INSERT);
pixDestroy(&pix1);
pixDestroy(&pix2);
pixDestroy(&pix3);
}
bmfDestroy(&bmf);
pixd = pixaDisplayTiledInRows(pixad, 32, maxwidth, scalefactor,
0, 10, border);
pixaDestroy(&pixad);
return pixd;
}
/*!
* \brief pixaDisplayTiledByIndex()
*
* \param[in] pixa
* \param[in] na numa with indices corresponding to the pix in pixa
* \param[in] width each pix is scaled to this width
* \param[in] spacing between images, and on outside
* \param[in] border width of black border added to each image;
* use 0 for no border
* \param[in] fontsize 4, 6, ... 20
* \param[in] textcolor 0xrrggbb00
* \return pixd of tiled images, or NULL on error
*
*
* Notes:
* (1) This renders a pixa to a single image with white
* background color, where the pix are placed in columns
* given by the index value in the numa. Each pix
* is separated by %spacing from the adjacent ones, and
* an optional border is placed around them.
* (2) Up to 127 chars of text in the pix text field are rendered
* below each pix. Use newlines in the text field to write
* the text in multiple lines that fit within the pix width.
* (3) To avoid having empty columns, if there are N different
* index values, they should be in [0 ... N-1].
* (4) All pix are converted to 32 bpp.
*
*/
PIX *
pixaDisplayTiledByIndex(PIXA *pixa,
NUMA *na,
l_int32 width,
l_int32 spacing,
l_int32 border,
l_int32 fontsize,
l_uint32 textcolor)
{
char buf[128];
char *textstr;
l_int32 i, n, x, y, w, h, yval, index;
l_float32 maxindex;
L_BMF *bmf;
BOX *box;
NUMA *nay; /* top of the next pix to add in that column */
PIX *pix1, *pix2, *pix3, *pix4, *pix5, *pixd;
PIXA *pixad;
PROCNAME("pixaDisplayTiledByIndex");
if (!pixa)
return (PIX *)ERROR_PTR("pixa not defined", procName, NULL);
if (!na)
return (PIX *)ERROR_PTR("na not defined", procName, NULL);
if ((n = pixaGetCount(pixa)) == 0)
return (PIX *)ERROR_PTR("no pixa components", procName, NULL);
if (n != numaGetCount(na))
return (PIX *)ERROR_PTR("pixa and na counts differ", procName, NULL);
if (width <= 0)
return (PIX *)ERROR_PTR("invalid width", procName, NULL);
if (width < 20)
L_WARNING("very small width: %d\n", procName, width);
if (border < 0)
border = 0;
if (fontsize < 4 || fontsize > 20 || (fontsize & 1)) {
l_int32 fsize = L_MAX(L_MIN(fontsize, 20), 4);
if (fsize & 1) fsize--;
L_WARNING("changed fontsize from %d to %d\n", procName,
fontsize, fsize);
fontsize = fsize;
}
/* The pix will be rendered in the order they occupy in pixa. */
bmf = bmfCreate(NULL, fontsize);
pixad = pixaCreate(n);
numaGetMax(na, &maxindex, NULL);
nay = numaMakeConstant(spacing, lept_roundftoi(maxindex) + 1);
for (i = 0; i < n; i++) {
numaGetIValue(na, i, &index);
numaGetIValue(nay, index, &yval);
pix1 = pixaGetPix(pixa, i, L_CLONE);
pix2 = pixConvertTo32(pix1);
pix3 = pixScaleToSize(pix2, width, 0);
pix4 = pixAddBorderGeneral(pix3, border, border, border, border, 0);
textstr = pixGetText(pix1);
if (textstr && strlen(textstr) > 0) {
snprintf(buf, sizeof(buf), "%s", textstr);
pix5 = pixAddTextlines(pix4, bmf, textstr, textcolor, L_ADD_BELOW);
} else {
pix5 = pixClone(pix4);
}
pixaAddPix(pixad, pix5, L_INSERT);
x = spacing + border + index * (2 * border + width + spacing);
y = yval;
pixGetDimensions(pix5, &w, &h, NULL);
yval += h + spacing;
numaSetValue(nay, index, yval);
box = boxCreate(x, y, w, h);
pixaAddBox(pixad, box, L_INSERT);
pixDestroy(&pix1);
pixDestroy(&pix2);
pixDestroy(&pix3);
pixDestroy(&pix4);
}
numaDestroy(&nay);
bmfDestroy(&bmf);
pixd = pixaDisplay(pixad, 0, 0);
pixaDestroy(&pixad);
return pixd;
}
/*---------------------------------------------------------------------*
* Pixaa Display *
*---------------------------------------------------------------------*/
/*!
* \brief pixaaDisplay()
*
* \param[in] paa
* \param[in] w, h if set to 0, the size is determined from the
* bounding box of the components in pixa
* \return pix, or NULL on error
*
*
* Notes:
* (1) Each pix of the paa is displayed at the location given by
* its box, translated by the box of the containing pixa
* if it exists.
*
*/
PIX *
pixaaDisplay(PIXAA *paa,
l_int32 w,
l_int32 h)
{
l_int32 i, j, n, nbox, na, d, wmax, hmax, x, y, xb, yb, wb, hb;
BOXA *boxa1; /* top-level boxa */
BOXA *boxa;
PIX *pix1, *pixd;
PIXA *pixa;
PROCNAME("pixaaDisplay");
if (!paa)
return (PIX *)ERROR_PTR("paa not defined", procName, NULL);
n = pixaaGetCount(paa, NULL);
if (n == 0)
return (PIX *)ERROR_PTR("no components", procName, NULL);
/* If w and h not input, determine the minimum size required
* to contain the origin and all c.c. */
boxa1 = pixaaGetBoxa(paa, L_CLONE);
nbox = boxaGetCount(boxa1);
if (w == 0 || h == 0) {
if (nbox == n) {
boxaGetExtent(boxa1, &w, &h, NULL);
} else { /* have to use the lower-level boxa for each pixa */
wmax = hmax = 0;
for (i = 0; i < n; i++) {
pixa = pixaaGetPixa(paa, i, L_CLONE);
boxa = pixaGetBoxa(pixa, L_CLONE);
boxaGetExtent(boxa, &w, &h, NULL);
wmax = L_MAX(wmax, w);
hmax = L_MAX(hmax, h);
pixaDestroy(&pixa);
boxaDestroy(&boxa);
}
w = wmax;
h = hmax;
}
}
/* Get depth from first pix */
pixa = pixaaGetPixa(paa, 0, L_CLONE);
pix1 = pixaGetPix(pixa, 0, L_CLONE);
d = pixGetDepth(pix1);
pixaDestroy(&pixa);
pixDestroy(&pix1);
if ((pixd = pixCreate(w, h, d)) == NULL) {
boxaDestroy(&boxa1);
return (PIX *)ERROR_PTR("pixd not made", procName, NULL);
}
x = y = 0;
for (i = 0; i < n; i++) {
pixa = pixaaGetPixa(paa, i, L_CLONE);
if (nbox == n)
boxaGetBoxGeometry(boxa1, i, &x, &y, NULL, NULL);
na = pixaGetCount(pixa);
for (j = 0; j < na; j++) {
pixaGetBoxGeometry(pixa, j, &xb, &yb, &wb, &hb);
pix1 = pixaGetPix(pixa, j, L_CLONE);
pixRasterop(pixd, x + xb, y + yb, wb, hb, PIX_PAINT, pix1, 0, 0);
pixDestroy(&pix1);
}
pixaDestroy(&pixa);
}
boxaDestroy(&boxa1);
return pixd;
}
/*!
* \brief pixaaDisplayByPixa()
*
* \param[in] paa with pix that may have different depths
* \param[in] xspace between pix in pixa
* \param[in] yspace between pixa
* \param[in] maxw max width of output pix
* \return pixd, or NULL on error
*
*
* Notes:
* (1) Displays each pixa on a line (or set of lines),
* in order from top to bottom. Within each pixa,
* the pix are displayed in order from left to right.
* (2) The sizes and depths of each pix can differ. The output pix
* has a depth equal to the max depth of all the pix.
* (3) This ignores the boxa of the paa.
*
*/
PIX *
pixaaDisplayByPixa(PIXAA *paa,
l_int32 xspace,
l_int32 yspace,
l_int32 maxw)
{
l_int32 i, j, npixa, npix, same, use_maxw, x, y, w, h, hindex;
l_int32 maxwidth, maxd, width, lmaxh, lmaxw;
l_int32 *harray;
NUMA *nah;
PIX *pix, *pix1, *pixd;
PIXA *pixa;
PROCNAME("pixaaDisplayByPixa");
if (!paa)
return (PIX *)ERROR_PTR("paa not defined", procName, NULL);
if ((npixa = pixaaGetCount(paa, NULL)) == 0)
return (PIX *)ERROR_PTR("no components", procName, NULL);
pixaaVerifyDepth(paa, &same, &maxd);
if (!same && maxd < 8)
return (PIX *)ERROR_PTR("depths differ; max < 8", procName, NULL);
/* Be sure the widest box fits in the output pix */
pixaaSizeRange(paa, NULL, NULL, &maxwidth, NULL);
if (maxwidth > maxw) {
L_WARNING("maxwidth > maxw; using maxwidth\n", procName);
maxw = maxwidth;
}
/* Get size of output pix. The width is the minimum of the
* maxw and the largest pixa line width. The height is whatever
* it needs to be to accommodate all pixa. */
lmaxw = 0; /* widest line found */
use_maxw = FALSE;
nah = numaCreate(0); /* store height of each line */
y = yspace;
for (i = 0; i < npixa; i++) {
pixa = pixaaGetPixa(paa, i, L_CLONE);
npix = pixaGetCount(pixa);
if (npix == 0) {
pixaDestroy(&pixa);
continue;
}
x = xspace;
lmaxh = 0; /* max height found in the line */
for (j = 0; j < npix; j++) {
pix = pixaGetPix(pixa, j, L_CLONE);
pixGetDimensions(pix, &w, &h, NULL);
if (x + w >= maxw) { /* start new line */
x = xspace;
y += lmaxh + yspace;
numaAddNumber(nah, lmaxh);
lmaxh = 0;
use_maxw = TRUE;
}
x += w + xspace;
lmaxh = L_MAX(h, lmaxh);
lmaxw = L_MAX(lmaxw, x);
pixDestroy(&pix);
}
y += lmaxh + yspace;
numaAddNumber(nah, lmaxh);
pixaDestroy(&pixa);
}
width = (use_maxw) ? maxw : lmaxw;
if ((pixd = pixCreate(width, y, maxd)) == NULL) {
numaDestroy(&nah);
return (PIX *)ERROR_PTR("pixd not made", procName, NULL);
}
/* Now layout the pix by pixa */
y = yspace;
harray = numaGetIArray(nah);
hindex = 0;
for (i = 0; i < npixa; i++) {
x = xspace;
pixa = pixaaGetPixa(paa, i, L_CLONE);
npix = pixaGetCount(pixa);
if (npix == 0) {
pixaDestroy(&pixa);
continue;
}
for (j = 0; j < npix; j++) {
pix = pixaGetPix(pixa, j, L_CLONE);
if (pixGetDepth(pix) != maxd) {
if (maxd == 8)
pix1 = pixConvertTo8(pix, 0);
else /* 32 bpp */
pix1 = pixConvertTo32(pix);
} else {
pix1 = pixClone(pix);
}
pixGetDimensions(pix1, &w, &h, NULL);
if (x + w >= maxw) { /* start new line */
x = xspace;
y += harray[hindex++] + yspace;
}
pixRasterop(pixd, x, y, w, h, PIX_PAINT, pix1, 0, 0);
pixDestroy(&pix);
pixDestroy(&pix1);
x += w + xspace;
}
y += harray[hindex++] + yspace;
pixaDestroy(&pixa);
}
LEPT_FREE(harray);
numaDestroy(&nah);
return pixd;
}
/*!
* \brief pixaaDisplayTiledAndScaled()
*
* \param[in] paa
* \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 pixa of tiled images, one image for each pixa in
* the paa, or NULL on error
*
*
* Notes:
* (1) For each pixa, this generates from all the pix a
* tiled/scaled output pix, and puts it in the output pixa.
* (2) See comments in pixaDisplayTiledAndScaled().
*
*/
PIXA *
pixaaDisplayTiledAndScaled(PIXAA *paa,
l_int32 outdepth,
l_int32 tilewidth,
l_int32 ncols,
l_int32 background,
l_int32 spacing,
l_int32 border)
{
l_int32 i, n;
PIX *pix;
PIXA *pixa, *pixad;
PROCNAME("pixaaDisplayTiledAndScaled");
if (!paa)
return (PIXA *)ERROR_PTR("paa not defined", procName, NULL);
if (outdepth != 1 && outdepth != 8 && outdepth != 32)
return (PIXA *)ERROR_PTR("outdepth not in {1, 8, 32}", procName, NULL);
if (ncols <= 0)
return (PIXA *)ERROR_PTR("ncols must be > 0", procName, NULL);
if (border < 0 || border > tilewidth / 5)
border = 0;
if ((n = pixaaGetCount(paa, NULL)) == 0)
return (PIXA *)ERROR_PTR("no components", procName, NULL);
pixad = pixaCreate(n);
for (i = 0; i < n; i++) {
pixa = pixaaGetPixa(paa, i, L_CLONE);
pix = pixaDisplayTiledAndScaled(pixa, outdepth, tilewidth, ncols,
background, spacing, border);
pixaAddPix(pixad, pix, L_INSERT);
pixaDestroy(&pixa);
}
return pixad;
}
/*---------------------------------------------------------------------*
* Conversion of all pix to specified type (e.g., depth) *
*---------------------------------------------------------------------*/
/*!
* \brief pixaConvertTo1()
*
* \param[in] pixas
* \param[in] thresh threshold for final binarization from 8 bpp gray
* \return pixad, or NULL on error
*/
PIXA *
pixaConvertTo1(PIXA *pixas,
l_int32 thresh)
{
l_int32 i, n;
BOXA *boxa;
PIX *pix1, *pix2;
PIXA *pixad;
PROCNAME("pixaConvertTo1");
if (!pixas)
return (PIXA *)ERROR_PTR("pixas not defined", procName, NULL);
n = pixaGetCount(pixas);
pixad = pixaCreate(n);
for (i = 0; i < n; i++) {
pix1 = pixaGetPix(pixas, i, L_CLONE);
pix2 = pixConvertTo1(pix1, thresh);
pixaAddPix(pixad, pix2, L_INSERT);
pixDestroy(&pix1);
}
boxa = pixaGetBoxa(pixas, L_COPY);
pixaSetBoxa(pixad, boxa, L_INSERT);
return pixad;
}
/*!
* \brief pixaConvertTo8()
*
* \param[in] pixas
* \param[in] cmapflag 1 to give pixd a colormap; 0 otherwise
* \return pixad each pix is 8 bpp, or NULL on error
*
*
* Notes:
* (1) See notes for pixConvertTo8(), applied to each pix in pixas.
*
*/
PIXA *
pixaConvertTo8(PIXA *pixas,
l_int32 cmapflag)
{
l_int32 i, n;
BOXA *boxa;
PIX *pix1, *pix2;
PIXA *pixad;
PROCNAME("pixaConvertTo8");
if (!pixas)
return (PIXA *)ERROR_PTR("pixas not defined", procName, NULL);
n = pixaGetCount(pixas);
pixad = pixaCreate(n);
for (i = 0; i < n; i++) {
pix1 = pixaGetPix(pixas, i, L_CLONE);
pix2 = pixConvertTo8(pix1, cmapflag);
pixaAddPix(pixad, pix2, L_INSERT);
pixDestroy(&pix1);
}
boxa = pixaGetBoxa(pixas, L_COPY);
pixaSetBoxa(pixad, boxa, L_INSERT);
return pixad;
}
/*!
* \brief pixaConvertTo8Colormap()
*
* \param[in] pixas
* \param[in] dither 1 to dither if necessary; 0 otherwise
* \return pixad each pix is 8 bpp, or NULL on error
*
*
* Notes:
* (1) See notes for pixConvertTo8Colormap(), applied to each pix in pixas.
*
*/
PIXA *
pixaConvertTo8Colormap(PIXA *pixas,
l_int32 dither)
{
l_int32 i, n;
BOXA *boxa;
PIX *pix1, *pix2;
PIXA *pixad;
PROCNAME("pixaConvertTo8Colormap");
if (!pixas)
return (PIXA *)ERROR_PTR("pixas not defined", procName, NULL);
n = pixaGetCount(pixas);
pixad = pixaCreate(n);
for (i = 0; i < n; i++) {
pix1 = pixaGetPix(pixas, i, L_CLONE);
pix2 = pixConvertTo8Colormap(pix1, dither);
pixaAddPix(pixad, pix2, L_INSERT);
pixDestroy(&pix1);
}
boxa = pixaGetBoxa(pixas, L_COPY);
pixaSetBoxa(pixad, boxa, L_INSERT);
return pixad;
}
/*!
* \brief pixaConvertTo32()
*
* \param[in] pixas
* \return pixad 32 bpp rgb, or NULL on error
*
*
* Notes:
* (1) See notes for pixConvertTo32(), applied to each pix in pixas.
* (2) This can be used to allow 1 bpp pix in a pixa to be displayed
* with color.
*
*/
PIXA *
pixaConvertTo32(PIXA *pixas)
{
l_int32 i, n;
BOXA *boxa;
PIX *pix1, *pix2;
PIXA *pixad;
PROCNAME("pixaConvertTo32");
if (!pixas)
return (PIXA *)ERROR_PTR("pixas not defined", procName, NULL);
n = pixaGetCount(pixas);
pixad = pixaCreate(n);
for (i = 0; i < n; i++) {
pix1 = pixaGetPix(pixas, i, L_CLONE);
pix2 = pixConvertTo32(pix1);
pixaAddPix(pixad, pix2, L_INSERT);
pixDestroy(&pix1);
}
boxa = pixaGetBoxa(pixas, L_COPY);
pixaSetBoxa(pixad, boxa, L_INSERT);
return pixad;
}
/*---------------------------------------------------------------------*
* Pixa constrained selection *
*---------------------------------------------------------------------*/
/*!
* \brief pixaConstrainedSelect()
*
* \param[in] pixas
* \param[in] first first index to choose; >= 0
* \param[in] last biggest possible index to reach;
* use -1 to go to the end; otherwise, last >= first
* \param[in] nmax maximum number of pix to select; > 0
* \param[in] use_pairs 1 = select pairs of adjacent pix;
* 0 = select individual pix
* \param[in] copyflag L_COPY, L_CLONE
* \return pixad if OK, NULL on error
*
*
* Notes:
* (1) See notes in genConstrainedNumaInRange() for how selection
* is made.
* (2) This returns a selection of the pix in the input pixa.
* (3) Use copyflag == L_COPY if you don't want changes in the pix
* in the returned pixa to affect those in the input pixa.
*
*/
PIXA *
pixaConstrainedSelect(PIXA *pixas,
l_int32 first,
l_int32 last,
l_int32 nmax,
l_int32 use_pairs,
l_int32 copyflag)
{
l_int32 i, n, nselect, index;
NUMA *na;
PIX *pix1;
PIXA *pixad;
PROCNAME("pixaConstrainedSelect");
if (!pixas)
return (PIXA *)ERROR_PTR("pixas not defined", procName, NULL);
n = pixaGetCount(pixas);
first = L_MAX(0, first);
last = (last < 0) ? n - 1 : L_MIN(n - 1, last);
if (last < first)
return (PIXA *)ERROR_PTR("last < first!", procName, NULL);
if (nmax < 1)
return (PIXA *)ERROR_PTR("nmax < 1!", procName, NULL);
na = genConstrainedNumaInRange(first, last, nmax, use_pairs);
nselect = numaGetCount(na);
pixad = pixaCreate(nselect);
for (i = 0; i < nselect; i++) {
numaGetIValue(na, i, &index);
pix1 = pixaGetPix(pixas, index, copyflag);
pixaAddPix(pixad, pix1, L_INSERT);
}
numaDestroy(&na);
return pixad;
}
/*!
* \brief pixaSelectToPdf()
*
* \param[in] pixas
* \param[in] first first index to choose; >= 0
* \param[in] last biggest possible index to reach;
* use -1 to go to the end; otherwise, last >= first
* \param[in] res override the resolution of each input image, in ppi;
* use 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, or 0 for default
* \param[in] quality used for JPEG only; 0 for default (75)
* \param[in] color of numbers added to each image (e.g., 0xff000000)
* \param[in] fontsize to print number below each image. The valid set
* is {4,6,8,10,12,14,16,18,20}. Use 0 to disable.
* \param[in] fileout pdf file of all images
* \return 0 if OK, 1 on error
*
*
* Notes:
* (1) This writes a pdf of the selected images from %pixas, one to
* a page. They are optionally scaled and annotated with the
* index printed to the left of the image.
* (2) If the input images are 1 bpp and you want the numbers to be
* in color, first promote each pix to 8 bpp with a colormap:
* pixa1 = pixaConvertTo8(pixas, 1);
* and then call this function with the specified color
*
*/
l_int32
pixaSelectToPdf(PIXA *pixas,
l_int32 first,
l_int32 last,
l_int32 res,
l_float32 scalefactor,
l_int32 type,
l_int32 quality,
l_uint32 color,
l_int32 fontsize,
const char *fileout)
{
l_int32 n;
L_BMF *bmf;
NUMA *na;
PIXA *pixa1, *pixa2;
PROCNAME("pixaSelectToPdf");
if (!pixas)
return ERROR_INT("pixas not defined", procName, 1);
if (type < 0 || type > L_FLATE_ENCODE) {
L_WARNING("invalid compression type; using default\n", procName);
type = 0;
}
if (!fileout)
return ERROR_INT("fileout not defined", procName, 1);
/* Select from given range */
n = pixaGetCount(pixas);
first = L_MAX(0, first);
last = (last < 0) ? n - 1 : L_MIN(n - 1, last);
if (first > last) {
L_ERROR("first = %d > last = %d\n", procName, first, last);
return 1;
}
pixa1 = pixaSelectRange(pixas, first, last, L_CLONE);
/* Optionally add index numbers */
bmf = (fontsize <= 0) ? NULL : bmfCreate(NULL, fontsize);
if (bmf) {
na = numaMakeSequence(first, 1.0, last - first + 1);
pixa2 = pixaAddTextNumber(pixa1, bmf, na, color, L_ADD_LEFT);
numaDestroy(&na);
} else {
pixa2 = pixaCopy(pixa1, L_CLONE);
}
pixaDestroy(&pixa1);
bmfDestroy(&bmf);
pixaConvertToPdf(pixa2, res, scalefactor, type, quality, NULL, fileout);
pixaDestroy(&pixa2);
return 0;
}
/*---------------------------------------------------------------------*
* Pixa display into multiple tiles *
*---------------------------------------------------------------------*/
/*!
* \brief pixaDisplayMultiTiled()
*
* \param[in] pixas
* \param[in] nx, ny in [1, ... 50], tiling factors in each direction
* \param[in] maxw, maxh max sizes to keep
* \param[in] scalefactor scale each image by this
* \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 pixad if OK, NULL on error
*
*
* Notes:
* (1) Each set of %nx * %ny images is optionally scaled and saved
* into a new pix, and then aggregated.
* (2) Set %maxw = %maxh = 0 if you want to include all pix from %pixs.
* (3) This is useful for generating a pdf from the output pixa, where
* each page is a tile of (%nx * %ny) images from the input pixa.
*
*/
PIXA *
pixaDisplayMultiTiled(PIXA *pixas,
l_int32 nx,
l_int32 ny,
l_int32 maxw,
l_int32 maxh,
l_float32 scalefactor,
l_int32 spacing,
l_int32 border)
{
l_int32 n, i, j, ntile, nout, index;
PIX *pix1, *pix2;
PIXA *pixa1, *pixa2, *pixad;
PROCNAME("pixaDisplayMultiTiled");
if (!pixas)
return (PIXA *)ERROR_PTR("pixas not defined", procName, NULL);
if (nx < 1 || ny < 1 || nx > 50 || ny > 50)
return (PIXA *)ERROR_PTR("invalid tiling factor(s)", procName, NULL);
if ((n = pixaGetCount(pixas)) == 0)
return (PIXA *)ERROR_PTR("pixas is empty", procName, NULL);
/* Filter out large ones if requested */
if (maxw == 0 && maxh == 0) {
pixa1 = pixaCopy(pixas, L_CLONE);
} else {
maxw = (maxw == 0) ? 1000000 : maxw;
maxh = (maxh == 0) ? 1000000 : maxh;
pixa1 = pixaSelectBySize(pixas, maxw, maxh, L_SELECT_IF_BOTH,
L_SELECT_IF_LTE, NULL);
n = pixaGetCount(pixa1);
}
ntile = nx * ny;
nout = L_MAX(1, (n + ntile - 1) / ntile);
pixad = pixaCreate(nout);
for (i = 0, index = 0; i < nout; i++) { /* over tiles */
pixa2 = pixaCreate(ntile);
for (j = 0; j < ntile && index < n; j++, index++) {
pix1 = pixaGetPix(pixa1, index, L_COPY);
pixaAddPix(pixa2, pix1, L_INSERT);
}
pix2 = pixaDisplayTiledInColumns(pixa2, nx, scalefactor, spacing,
border);
pixaAddPix(pixad, pix2, L_INSERT);
pixaDestroy(&pixa2);
}
pixaDestroy(&pixa1);
return pixad;
}
/*---------------------------------------------------------------------*
* Split pixa into files *
*---------------------------------------------------------------------*/
/*!
* \brief pixaSplitIntoFiles()
*
* \param[in] pixas
* \param[in] nsplit split pixas into this number of pixa; >= 2
* \param[in] scale scalefactor applied to each pix
* \param[in] outwidth the maxwidth parameter of tiled images
* for write_pix
* \param[in] write_pixa 1 to write the split pixa as separate files
* \param[in] write_pix 1 to write tiled images of the split pixa
* \param[in] write_pdf 1 to write pdfs of the split pixa
* \return 0 if OK, 1 on error
*
*
* Notes:
* (1) For each requested output, %nsplit files are written into
* directory /tmp/lept/split/.
* (2) This is useful when a pixa is so large that the images
* are not conveniently displayed as a single tiled image at
* full resolution.
*
*/
l_int32
pixaSplitIntoFiles(PIXA *pixas,
l_int32 nsplit,
l_float32 scale,
l_int32 outwidth,
l_int32 write_pixa,
l_int32 write_pix,
l_int32 write_pdf)
{
char buf[64];
l_int32 i, j, index, n, nt;
PIX *pix1, *pix2;
PIXA *pixa1;
PROCNAME("pixaSplitIntoFiles");
if (!pixas)
return ERROR_INT("pixas not defined", procName, 1);
if (nsplit <= 1)
return ERROR_INT("nsplit must be >= 2", procName, 1);
if ((nt = pixaGetCount(pixas)) == 0)
return ERROR_INT("pixas is empty", procName, 1);
if (!write_pixa && !write_pix && !write_pdf)
return ERROR_INT("no output is requested", procName, 1);
lept_mkdir("lept/split");
n = (nt + nsplit - 1) / nsplit;
fprintf(stderr, "nt = %d, n = %d, nsplit = %d\n", nt, n, nsplit);
for (i = 0, index = 0; i < nsplit; i++) {
pixa1 = pixaCreate(n);
for (j = 0; j < n && index < nt; j++, index++) {
pix1 = pixaGetPix(pixas, index, L_CLONE);
pix2 = pixScale(pix1, scale, scale);
pixaAddPix(pixa1, pix2, L_INSERT);
pixDestroy(&pix1);
}
if (write_pixa) {
snprintf(buf, sizeof(buf), "/tmp/lept/split/split%d.pa", i + 1);
pixaWriteDebug(buf, pixa1);
}
if (write_pix) {
snprintf(buf, sizeof(buf), "/tmp/lept/split/split%d.tif", i + 1);
pix1 = pixaDisplayTiledInRows(pixa1, 1, outwidth, 1.0, 0, 20, 2);
pixWriteDebug(buf, pix1, IFF_TIFF_G4);
pixDestroy(&pix1);
}
if (write_pdf) {
snprintf(buf, sizeof(buf), "/tmp/lept/split/split%d.pdf", i + 1);
pixaConvertToPdf(pixa1, 0, 1.0, L_G4_ENCODE, 0, buf, buf);
}
pixaDestroy(&pixa1);
}
return 0;
}
/*---------------------------------------------------------------------*
* Tile N-Up *
*---------------------------------------------------------------------*/
/*!
* \brief convertToNUpFiles()
*
* \param[in] dir full path to directory of images
* \param[in] substr [optional] can be null
* \param[in] nx, ny in [1, ... 50], tiling factors in each direction
* \param[in] tw target width, in pixels; must be >= 20
* \param[in] spacing between images, and on outside
* \param[in] border width of additional black border on each image;
* use 0 for no border
* \param[in] fontsize to print tail of filename with image. Valid set is
* {4,6,8,10,12,14,16,18,20}. Use 0 to disable.
* \param[in] outdir subdirectory of /tmp to put N-up tiled images
* \return 0 if OK, 1 on error
*
*
* Notes:
* (1) Each set of %nx * %ny images is scaled and tiled into a single
* image, that is written out to %outdir.
* (2) All images in each %nx * %ny set are scaled to the same
* width, %tw. This is typically used when all images are
* roughly the same size.
* (3) This is useful for generating a pdf from the set of input
* files, where each page is a tile of (%nx * %ny) input images.
* Typical values for %nx and %ny are in the range [2 ... 5].
* (4) If %fontsize != 0, each image has the tail of its filename
* rendered below it.
*
*/
l_int32
convertToNUpFiles(const char *dir,
const char *substr,
l_int32 nx,
l_int32 ny,
l_int32 tw,
l_int32 spacing,
l_int32 border,
l_int32 fontsize,
const char *outdir)
{
l_int32 d, format;
char rootpath[256];
PIXA *pixa;
PROCNAME("convertToNUpFiles");
if (!dir)
return ERROR_INT("dir not defined", procName, 1);
if (nx < 1 || ny < 1 || nx > 50 || ny > 50)
return ERROR_INT("invalid tiling N-factor", procName, 1);
if (fontsize < 0 || fontsize > 20 || fontsize & 1 || fontsize == 2)
return ERROR_INT("invalid fontsize", procName, 1);
if (!outdir)
return ERROR_INT("outdir not defined", procName, 1);
pixa = convertToNUpPixa(dir, substr, nx, ny, tw, spacing, border,
fontsize);
if (!pixa)
return ERROR_INT("pixa not made", procName, 1);
lept_rmdir(outdir);
lept_mkdir(outdir);
pixaGetRenderingDepth(pixa, &d);
format = (d == 1) ? IFF_TIFF_G4 : IFF_JFIF_JPEG;
makeTempDirname(rootpath, 256, outdir);
modifyTrailingSlash(rootpath, 256, L_ADD_TRAIL_SLASH);
pixaWriteFiles(rootpath, pixa, format);
pixaDestroy(&pixa);
return 0;
}
/*!
* \brief convertToNUpPixa()
*
* \param[in] dir full path to directory of images
* \param[in] substr [optional] can be null
* \param[in] nx, ny in [1, ... 50], tiling factors in each direction
* \param[in] tw target width, in pixels; must be >= 20
* \param[in] spacing between images, and on outside
* \param[in] border width of additional black border on each image;
* use 0 for no border
* \param[in] fontsize to print tail of filename with image. Valid set is
* {4,6,8,10,12,14,16,18,20}. Use 0 to disable.
* \return pixad, or NULL on error
*
*
* Notes:
* (1) See notes for convertToNUpFiles()
*
*/
PIXA *
convertToNUpPixa(const char *dir,
const char *substr,
l_int32 nx,
l_int32 ny,
l_int32 tw,
l_int32 spacing,
l_int32 border,
l_int32 fontsize)
{
l_int32 i, n;
char *fname, *tail;
PIXA *pixa1, *pixa2;
SARRAY *sa1, *sa2;
PROCNAME("convertToNUpPixa");
if (!dir)
return (PIXA *)ERROR_PTR("dir not defined", procName, NULL);
if (nx < 1 || ny < 1 || nx > 50 || ny > 50)
return (PIXA *)ERROR_PTR("invalid tiling N-factor", procName, NULL);
if (tw < 20)
return (PIXA *)ERROR_PTR("tw must be >= 20", procName, NULL);
if (fontsize < 0 || fontsize > 20 || fontsize & 1 || fontsize == 2)
return (PIXA *)ERROR_PTR("invalid fontsize", procName, NULL);
sa1 = getSortedPathnamesInDirectory(dir, substr, 0, 0);
pixa1 = pixaReadFilesSA(sa1);
n = sarrayGetCount(sa1);
sa2 = sarrayCreate(n);
for (i = 0; i < n; i++) {
fname = sarrayGetString(sa1, i, L_NOCOPY);
splitPathAtDirectory(fname, NULL, &tail);
sarrayAddString(sa2, tail, L_INSERT);
}
sarrayDestroy(&sa1);
pixa2 = pixaConvertToNUpPixa(pixa1, sa2, nx, ny, tw, spacing,
border, fontsize);
pixaDestroy(&pixa1);
sarrayDestroy(&sa2);
return pixa2;
}
/*!
* \brief pixaConvertToNUpPixa()
*
* \param[in] pixas
* \param[in] sa [optional] array of strings associated with each pix
* \param[in] nx, ny in [1, ... 50], tiling factors in each direction
* \param[in] tw target width, in pixels; must be >= 20
* \param[in] spacing between images, and on outside
* \param[in] border width of additional black border on each image;
* use 0 for no border
* \param[in] fontsize to print string with each image. Valid set is
* {4,6,8,10,12,14,16,18,20}. Use 0 to disable.
* \return pixad, or NULL on error
*
*
* Notes:
* (1) This takes an input pixa and an optional array of strings, and
* generates a pixa of NUp tiles from the input, labeled with
* the strings if they exist and %fontsize != 0.
* (2) See notes for convertToNUpFiles()
*
*/
PIXA *
pixaConvertToNUpPixa(PIXA *pixas,
SARRAY *sa,
l_int32 nx,
l_int32 ny,
l_int32 tw,
l_int32 spacing,
l_int32 border,
l_int32 fontsize)
{
l_int32 i, j, k, nt, n2, nout, d;
char *str;
L_BMF *bmf;
PIX *pix1, *pix2, *pix3, *pix4;
PIXA *pixa1, *pixad;
PROCNAME("pixaConvertToNUpPixa");
if (!pixas)
return (PIXA *)ERROR_PTR("pixas not defined", procName, NULL);
if (nx < 1 || ny < 1 || nx > 50 || ny > 50)
return (PIXA *)ERROR_PTR("invalid tiling N-factor", procName, NULL);
if (tw < 20)
return (PIXA *)ERROR_PTR("tw must be >= 20", procName, NULL);
if (fontsize < 0 || fontsize > 20 || fontsize & 1 || fontsize == 2)
return (PIXA *)ERROR_PTR("invalid fontsize", procName, NULL);
nt = pixaGetCount(pixas);
if (sa && (sarrayGetCount(sa) != nt)) {
L_WARNING("pixa size %d not equal to sarray size %d\n", procName,
nt, sarrayGetCount(sa));
}
n2 = nx * ny;
nout = (nt + n2 - 1) / n2;
pixad = pixaCreate(nout);
bmf = (fontsize == 0) ? NULL : bmfCreate(NULL, fontsize);
for (i = 0, j = 0; i < nout; i++) {
pixa1 = pixaCreate(n2);
for (k = 0; k < n2 && j < nt; j++, k++) {
pix1 = pixaGetPix(pixas, j, L_CLONE);
pix2 = pixScaleToSize(pix1, tw, 0); /* all images have width tw */
if (bmf && sa) {
str = sarrayGetString(sa, j, L_NOCOPY);
pix3 = pixAddTextlines(pix2, bmf, str, 0xff000000,
L_ADD_BELOW);
} else {
pix3 = pixClone(pix2);
}
pixaAddPix(pixa1, pix3, L_INSERT);
pixDestroy(&pix1);
pixDestroy(&pix2);
}
if (pixaGetCount(pixa1) == 0) { /* probably won't happen */
pixaDestroy(&pixa1);
continue;
}
/* Add 2 * border to image width to prevent scaling */
pixaGetRenderingDepth(pixa1, &d);
pix4 = pixaDisplayTiledAndScaled(pixa1, d, tw + 2 * border, nx, 0,
spacing, border);
pixaAddPix(pixad, pix4, L_INSERT);
pixaDestroy(&pixa1);
}
bmfDestroy(&bmf);
return pixad;
}
/*---------------------------------------------------------------------*
* Render two pixa side-by-side for comparison *
*---------------------------------------------------------------------*/
/*!
* \brief pixaCompareInPdf()
*
* \param[in] pixa1
* \param[in] pixa2
* \param[in] nx, ny in [1, ... 20], tiling factors in each direction
* \param[in] tw target width, in pixels; must be >= 20
* \param[in] spacing between images, and on outside
* \param[in] border width of additional black border on each image
* and on each pair; use 0 for no border
* \param[in] fontsize to print index of each pair of images. Valid set
* is {4,6,8,10,12,14,16,18,20}. Use 0 to disable.
* \param[in] fileout output pdf file
* \return 0 if OK, 1 on error
*
*
* Notes:
* (1) This takes two pixa and renders them interleaved, side-by-side
* in a pdf. A warning is issued if the input pixa arrays
* have different lengths.
* (2) %nx and %ny specify how many side-by-side pairs are displayed
* on each pdf page. For example, if %nx = 1 and %ny = 2, then
* two pairs are shown, one above the other, on each page.
* (3) The input pix are scaled to a target width of %tw, and
* then paired with optional %spacing between and optional
* black border of width %border.
* (4) After a pixa is generated of these tiled images, it is
* written to %fileout as a pdf.
* (5) Typical numbers for the input parameters are:
* %nx = small integer (1 - 4)
* %ny = 2 * %nx
* %tw = 200 - 500 pixels
* %spacing = 10
* %border = 2
* %fontsize = 10
* (6) If %fontsize != 0, the index of the pix pair in their pixa
* is printed out below each pair.
*
*/
l_int32
pixaCompareInPdf(PIXA *pixa1,
PIXA *pixa2,
l_int32 nx,
l_int32 ny,
l_int32 tw,
l_int32 spacing,
l_int32 border,
l_int32 fontsize,
const char *fileout)
{
l_int32 n1, n2, npairs;
PIXA *pixa3, *pixa4, *pixa5;
SARRAY *sa;
PROCNAME("pixaCompareInPdf");
if (!pixa1 || !pixa2)
return ERROR_INT("pixa1 and pixa2 not both defined", procName, 1);
if (nx < 1 || ny < 1 || nx > 20 || ny > 20)
return ERROR_INT("invalid tiling factors", procName, 1);
if (tw < 20)
return ERROR_INT("invalid tw; tw must be >= 20", procName, 1);
if (fontsize < 0 || fontsize > 20 || fontsize & 1 || fontsize == 2)
return ERROR_INT("invalid fontsize", procName, 1);
if (!fileout)
return ERROR_INT("fileout not defined", procName, 1);
n1 = pixaGetCount(pixa1);
n2 = pixaGetCount(pixa2);
if (n1 == 0 || n2 == 0)
return ERROR_INT("at least one pixa is empty", procName, 1);
if (n1 != n2)
L_WARNING("sizes (%d, %d) differ; using the minimum in interleave\n",
procName, n1, n2);
/* Interleave the input pixa */
if ((pixa3 = pixaInterleave(pixa1, pixa2, L_CLONE)) == NULL)
return ERROR_INT("pixa3 not made", procName, 1);
/* Scale the images if necessary and pair them up side/by/side */
pixa4 = pixaConvertToNUpPixa(pixa3, NULL, 2, 1, tw, spacing, border, 0);
pixaDestroy(&pixa3);
/* Label the pairs and mosaic into pages without further scaling */
npairs = pixaGetCount(pixa4);
sa = (fontsize > 0) ? sarrayGenerateIntegers(npairs) : NULL;
pixa5 = pixaConvertToNUpPixa(pixa4, sa, nx, ny,
2 * tw + 4 * border + spacing,
spacing, border, fontsize);
pixaDestroy(&pixa4);
sarrayDestroy(&sa);
/* Output as pdf without scaling */
pixaConvertToPdf(pixa5, 0, 1.0, 0, 0, NULL, fileout);
pixaDestroy(&pixa5);
return 0;
}