diff options
Diffstat (limited to 'generator/pamstereogram.c')
| -rw-r--r-- | generator/pamstereogram.c | 134 |
1 files changed, 90 insertions, 44 deletions
diff --git a/generator/pamstereogram.c b/generator/pamstereogram.c index 9b861b51..4bc1ea92 100644 --- a/generator/pamstereogram.c +++ b/generator/pamstereogram.c @@ -16,7 +16,7 @@ * * ---------------------------------------------------------------------- * - * Copyright (C) 2006-2020 Scott Pakin <scott+pbm@pakin.org> + * Copyright (C) 2006-2021 Scott Pakin <scott+pbm@pakin.org> * * All rights reserved. * @@ -58,11 +58,12 @@ #include "pm_c_util.h" #include "mallocvar.h" #include "nstring.h" +#include "rand.h" #include "shhopt.h" #include "pam.h" -enum outputType {OUTPUT_BW, OUTPUT_GRAYSCALE, OUTPUT_COLOR}; +enum OutputType {OUTPUT_BW, OUTPUT_GRAYSCALE, OUTPUT_COLOR}; /* ---------------------------------------------------------------------- */ @@ -85,13 +86,14 @@ struct cmdlineInfo { unsigned int magnifypat; /* -magnifypat option */ int xshift; /* -xshift option */ int yshift; /* -yshift option */ + int yfillshift; /* -yfillshift option */ const char * patfile; /* -patfile option. Null if none */ const char * texfile; /* -texfile option. Null if none */ const char * bgcolor; /* -bgcolor option */ unsigned int smoothing; /* -smoothing option */ unsigned int randomseed; /* -randomseed option */ unsigned int randomseedSpec; /* -randomseed option count */ - enum outputType outputType; /* Type of output file */ + enum OutputType outputType; /* Type of output file */ unsigned int xbegin; /* -xbegin option */ unsigned int xbeginSpec; /* -xbegin option count */ unsigned int tileable; /* -tileable option */ @@ -153,8 +155,8 @@ parseCommandLine(int argc, unsigned int option_def_index; unsigned int patfileSpec, texfileSpec, dpiSpec, eyesepSpec, depthSpec, - guidesizeSpec, magnifypatSpec, xshiftSpec, yshiftSpec, - bgcolorSpec, smoothingSpec, planesSpec; + guidesizeSpec, magnifypatSpec, xshiftSpec, yshiftSpec, yfillshiftSpec, + bgcolorSpec, smoothingSpec, planesSpec; unsigned int blackandwhite, grayscale, color; const char ** planes; @@ -194,6 +196,8 @@ parseCommandLine(int argc, &xshiftSpec, 0); OPTENT3(0, "yshift", OPT_INT, &cmdlineP->yshift, &yshiftSpec, 0); + OPTENT3(0, "yfillshift", OPT_INT, &cmdlineP->yfillshift, + &yfillshiftSpec, 0); OPTENT3(0, "patfile", OPT_STRING, &cmdlineP->patfile, &patfileSpec, 0); OPTENT3(0, "texfile", OPT_STRING, &cmdlineP->texfile, @@ -282,9 +286,10 @@ parseCommandLine(int argc, if (!xshiftSpec) cmdlineP->xshift = 0; - if (!yshiftSpec) cmdlineP->yshift = 0; + if (!yfillshiftSpec) + cmdlineP->yfillshift = 0; if (xshiftSpec && !cmdlineP->patfile) pm_error("-xshift is valid only with -patfile"); @@ -402,11 +407,12 @@ typedef struct outGenerator { -struct randomState { +struct RandomState { /* The state of a randomColor generator. */ unsigned int magnifypat; tuple * currentRow; unsigned int prevy; + struct pm_randSt * randStP; }; @@ -421,7 +427,7 @@ randomColor(outGenerator * const outGenP, /*---------------------------------------------------------------------------- Return a random RGB value. -----------------------------------------------------------------------------*/ - struct randomState * const stateP = outGenP->stateP; + struct RandomState * const stateP = outGenP->stateP; /* Every time we start a new row, we select a new sequence of random colors. @@ -436,7 +442,7 @@ randomColor(outGenerator * const outGenP, unsigned int plane; for (plane = 0; plane < outGenP->pam.depth; ++plane) { - unsigned int const randval = rand(); + unsigned int const randval = pm_rand(stateP->randStP); thisTuple[plane] = randval % modulus; } } @@ -456,9 +462,13 @@ static outGenStateTerm termRandomColor; static void termRandomColor(outGenerator * const outGenP) { - struct randomState * const stateP = outGenP->stateP; + struct RandomState * const stateP = outGenP->stateP; pnm_freepamrow(stateP->currentRow); + + pm_randterm(stateP->randStP); + + free(stateP->randStP); } @@ -468,7 +478,7 @@ initRandomColor(outGenerator * const outGenP, const struct pam * const inPamP, struct cmdlineInfo const cmdline) { - struct randomState * stateP; + struct RandomState * stateP; outGenP->pam.format = PAM_FORMAT; outGenP->pam.plainformat = 0; @@ -499,6 +509,10 @@ initRandomColor(outGenerator * const outGenP, stateP->magnifypat = cmdline.magnifypat; stateP->prevy = (unsigned int)(-cmdline.magnifypat); + MALLOCVAR_NOFAIL(stateP->randStP); + pm_randinit(stateP->randStP); + pm_srand2(stateP->randStP, cmdline.randomseedSpec, cmdline.randomseed); + outGenP->stateP = stateP; outGenP->getTuple = &randomColor; outGenP->terminateState = &termRandomColor; @@ -1178,6 +1192,8 @@ static void makeImageRow(outGenerator * const outGenP, unsigned int const row, unsigned int const xbegin, + unsigned int const farWidth, + int const yfillshift, const unsigned int * const sameL, const unsigned int * const sameR, const tuple * const outRow) { @@ -1200,42 +1216,59 @@ makeImageRow(outGenerator * const outGenP, sameL[N] > N is not allowed. -----------------------------------------------------------------------------*/ - int col; - int lastLinked; + unsigned int const width = outGenP->pam.width; + unsigned int const height = outGenP->pam.height; - for (col = (int)xbegin, lastLinked = INT_MIN; - col < outGenP->pam.width; - ++col) { + unsigned int col; + bool colHasBeenLinked; + unsigned int lastLinkedCol; + /* Last column to have been linked; meaningless if 'colHasBeenLinked' + is false. + */ + + for (col = xbegin, colHasBeenLinked = false; col < width; ++col) { tuple newtuple; - if (sameL[col] == col || sameL[col] < (int)xbegin) { - if (lastLinked == col - 1) - newtuple = outRow[col - 1]; - else - newtuple = outGenP->getTuple(outGenP, col, row); + if (sameL[col] == col || sameL[col] < xbegin) { + if (colHasBeenLinked && lastLinkedCol == col - 1) + newtuple = outRow[lastLinkedCol]; + else { + if (col < xbegin + farWidth) + newtuple = outGenP->getTuple(outGenP, col, row); + else + newtuple = outGenP->getTuple( + outGenP, col, (row + height - yfillshift) % height); + } } else { - newtuple = outRow[sameL[col]]; - lastLinked = col; - /* Keep track of the last pixel to be constrained. */ + newtuple = outRow[sameL[col]]; + colHasBeenLinked = true; + lastLinkedCol = col; + /* Keep track of the last pixel to be constrained. */ } pnm_assigntuple(&outGenP->pam, outRow[col], newtuple); } - for (col = (int)xbegin - 1, lastLinked = INT_MIN; col >= 0; --col) { + for (col = xbegin, colHasBeenLinked = false; col > 0; --col) { tuple newtuple; - if (sameR[col] == col) { - if (lastLinked == col + 1) - newtuple = outRow[col + 1]; - else - newtuple = outGenP->getTuple(outGenP, col, row); + if (sameR[col-1] == col-1) { + if (colHasBeenLinked && lastLinkedCol == col) + newtuple = outRow[lastLinkedCol]; + else { + if (col > xbegin - farWidth) + newtuple = outGenP->getTuple(outGenP, col-1, row); + else + newtuple = outGenP->getTuple( + outGenP, col-1, (row + height - yfillshift) % height); + } } else { - newtuple = outRow[sameR[col]]; - lastLinked = col; + newtuple = outRow[sameR[col-1]]; + colHasBeenLinked = true; + lastLinkedCol = col - 1; /* Keep track of the last pixel to be constrained. */ } - pnm_assigntuple(&outGenP->pam, outRow[col], newtuple); + pnm_assigntuple(&outGenP->pam, outRow[col-1], newtuple); } } @@ -1261,6 +1294,8 @@ makeOneImageRow(unsigned int const row, const unsigned int * const sameR, unsigned int * const colNumBuffer, unsigned int const xbegin, + unsigned int const farWidth, + int const yfillshift, tuple * const rowBuffer, tuple * const outRow) { @@ -1272,7 +1307,7 @@ makeOneImageRow(unsigned int const row, rowBuffer, outRow); else makeImageRow(outputGeneratorP, row, - xbegin, sameL, sameR, outRow); + xbegin, farWidth, yfillshift, sameL, sameR, outRow); } } @@ -1284,6 +1319,8 @@ constructRowTileable(const struct pam * const inPamP, bool const makeMask, const unsigned int * const sameL, const unsigned int * const sameR, + unsigned int const farWidth, + int const yfillshift, unsigned int const row, tuple * const outRow, tuple * const outRowBuf1, @@ -1300,10 +1337,10 @@ constructRowTileable(const struct pam * const inPamP, xbegin=maximum case. */ makeOneImageRow(row, outputGeneratorP, makeMask, sameL, sameR, colNumBuf2, - 0, outRowBuf2, outRow); + farWidth, yfillshift, 0, outRowBuf2, outRow); makeOneImageRow(row, outputGeneratorP, makeMask, sameL, sameR, colNumBuf2, - inPamP->width - 1, outRowBuf2, outRowMax); + farWidth, yfillshift, inPamP->width - 1, outRowBuf2, outRowMax); for (col = 0; col < inPamP->width; ++col) { unsigned int plane; @@ -1362,6 +1399,8 @@ doRow(const struct pam * const inPamP, unsigned int const magnifypat, unsigned int const smoothing, unsigned int const xbegin, + unsigned int const farWidth, + int const yfillshift, unsigned int const row, tuple * const inRow, tuple * const outRowBuf0, @@ -1397,13 +1436,16 @@ doRow(const struct pam * const inPamP, /* Construct a single row. */ if (tileable) { constructRowTileable(inPamP, outputGeneratorP, makeMask, - sameL, sameR, row, outRow, + sameL, sameR, + farWidth, yfillshift, + row, outRow, outRowBuf1, outRowBuf2, colNumBuf2); } else { makeOneImageRow(row, outputGeneratorP, makeMask, sameL, sameR, colNumBuf2, - xbegin, outRowBuf1, outRow); + xbegin, farWidth, yfillshift, + outRowBuf1, outRow); } /* Write the resulting row. */ @@ -1423,7 +1465,8 @@ makeImageRows(const struct pam * const inPamP, bool const tileable, unsigned int const magnifypat, unsigned int const smoothing, - unsigned int const xbegin) { + unsigned int const xbegin, + int const yfillshift) { tuple * inRow; /* Buffer for use in reading from the height-map image */ tuple * outRowBuf0; /* Buffer for use in generating output rows */ @@ -1433,6 +1476,8 @@ makeImageRows(const struct pam * const inPamP, unsigned int * colNumBuf1; unsigned int * colNumBuf2; unsigned int row; /* Current row in the input and output files */ + unsigned int pixelEyesep; + unsigned int farWidth; inRow = pnm_allocpamrow(inPamP); outRowBuf0 = pnm_allocpamrow(&outputGeneratorP->pam); @@ -1451,10 +1496,13 @@ makeImageRows(const struct pam * const inPamP, pm_error("Unable to allocate space for %u column buffer", inPamP->width); + pixelEyesep = ROUNDU(eyesep * dpi); + farWidth = pixelEyesep/(magnifypat * 2); + for (row = 0; row < inPamP->height; ++row) { doRow(inPamP, outputGeneratorP, depthOfField, eyesep, dpi, crossEyed, makeMask, tileable, magnifypat, smoothing, xbegin, - row, + farWidth, yfillshift, row, inRow, outRowBuf0, outRowBuf1, outRowBuf2, colNumBuf0, colNumBuf1, colNumBuf2); } @@ -1510,7 +1558,8 @@ produceStereogram(FILE * const ifP, makeImageRows(&inPam, outputGeneratorP, cmdline.depth, cmdline.eyesep, cmdline.dpi, cmdline.crosseyed, cmdline.makemask, cmdline.tileable, - cmdline.magnifypat, cmdline.smoothing, xbegin); + cmdline.magnifypat, cmdline.smoothing, xbegin, + cmdline.yfillshift); if (cmdline.guidebottom) drawguides(cmdline.guidesize, &outputGeneratorP->pam, @@ -1567,8 +1616,6 @@ main(int argc, const char *argv[]) { if (cmdline.verbose) reportParameters(cmdline); - srand(cmdline.randomseedSpec ? cmdline.randomseed : pm_randseed()); - ifP = pm_openr(cmdline.inputFilespec); /* Produce a stereogram. */ @@ -1580,4 +1627,3 @@ main(int argc, const char *argv[]) { } - |