diff options
Diffstat (limited to 'nx-X11/lib/font/bitmap/bitscale.c')
| -rw-r--r-- | nx-X11/lib/font/bitmap/bitscale.c | 1978 |
1 files changed, 1978 insertions, 0 deletions
diff --git a/nx-X11/lib/font/bitmap/bitscale.c b/nx-X11/lib/font/bitmap/bitscale.c new file mode 100644 index 000000000..8f7247eaf --- /dev/null +++ b/nx-X11/lib/font/bitmap/bitscale.c @@ -0,0 +1,1978 @@ +/* $Xorg: bitscale.c,v 1.5 2001/02/09 02:04:02 xorgcvs Exp $ */ +/* + +Copyright 1991, 1994, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR +OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, +ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR +OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall +not be used in advertising or otherwise to promote the sale, use or +other dealings in this Software without prior written authorization +from The Open Group. + +*/ +/* $XFree86: xc/lib/font/bitmap/bitscale.c,v 3.29tsi Exp $ */ + +/* + * Author: Keith Packard, MIT X Consortium + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +/* + * Translate monolithic #defines to modular definitions + */ + +#ifdef PCFFORMAT +#define XFONT_PCFFORMAT 1 +#endif + +#ifdef SNFFORMAT +#define XFONT_SNFFORMAT 1 +#endif + +#ifdef BDFFORMAT +#define XFONT_BDFFORMAT 1 +#endif + +#include <X11/fonts/fntfilst.h> +#include <X11/fonts/bitmap.h> +#include <X11/fonts/fontutil.h> +#ifndef FONTMODULE +#ifdef _XOPEN_SOURCE +#include <math.h> +#else +#define _XOPEN_SOURCE /* to get prototype for hypot on some systems */ +#include <math.h> +#undef _XOPEN_SOURCE +#endif +#endif + +#ifndef MAX +#define MAX(a,b) (((a)>(b)) ? a : b) +#endif + +/* Should get this from elsewhere */ +extern unsigned long serverGeneration; + +static void bitmapUnloadScalable (FontPtr pFont); +static void ScaleBitmap ( FontPtr pFont, CharInfoPtr opci, + CharInfoPtr pci, double *inv_xform, + double widthMult, double heightMult ); +static FontPtr BitmapScaleBitmaps(FontPtr pf, FontPtr opf, + double widthMult, double heightMult, + FontScalablePtr vals); +static FontPtr PrinterScaleBitmaps(FontPtr pf, FontPtr opf, + double widthMult, double heightMult, + FontScalablePtr vals); + +enum scaleType { + atom, truncate_atom, pixel_size, point_size, resolution_x, + resolution_y, average_width, scaledX, scaledY, unscaled, fontname, + raw_ascent, raw_descent, raw_pixelsize, raw_pointsize, + raw_average_width, uncomputed +}; + +typedef struct _fontProp { + char *name; + Atom atom; + enum scaleType type; +} fontProp; + +typedef FontPtr (*ScaleFunc) ( FontPtr /* pf */, + FontPtr /* opf */, + double /* widthMult */, + double /* heightMult */, + FontScalablePtr /* vals */); + +/* These next two arrays must be kept in step with the renderer array */ +ScaleFunc scale[] = +{ +#if XFONT_PCFFORMAT + BitmapScaleBitmaps, + BitmapScaleBitmaps, +#ifdef X_GZIP_FONT_COMPRESSION + BitmapScaleBitmaps, +#endif +#endif +#if XFONT_SNFFORMAT + BitmapScaleBitmaps, + BitmapScaleBitmaps, +#ifdef X_GZIP_FONT_COMPRESSION + BitmapScaleBitmaps, +#endif +#endif +#if XFONT_BDFFORMAT + BitmapScaleBitmaps, + BitmapScaleBitmaps, +#ifdef X_GZIP_FONT_COMPRESSION + BitmapScaleBitmaps, +#endif +#endif +#if XFONT_PCFFORMAT + PrinterScaleBitmaps, +#endif +}; + +static FontEntryPtr FindBestToScale ( FontPathElementPtr fpe, + FontEntryPtr entry, + FontScalablePtr vals, + FontScalablePtr best, + double *dxp, double *dyp, + double *sdxp, double *sdyp, + FontPathElementPtr *fpep ); +static FontEntryPtr FindPmfToScale ( FontPathElementPtr fpe, + FontEntryPtr entry, + FontScalablePtr vals, + FontScalablePtr best, + double *dxp, double *dyp, + double *sdxp, double *sdyp, + FontPathElementPtr *fpep ); + +typedef FontEntryPtr (*FindToScale) (FontPathElementPtr fpe, + FontEntryPtr entry, + FontScalablePtr vals, + FontScalablePtr best, + double *dxp, double *dyp, + double *sdxp, double *sdyp, + FontPathElementPtr *fpep); +FindToScale find_scale[] = +{ +#if XFONT_PCFFORMAT + FindBestToScale, + FindBestToScale, +#ifdef X_GZIP_FONT_COMPRESSION + FindBestToScale, +#endif +#endif +#if XFONT_SNFFORMAT + FindBestToScale, + FindBestToScale, +#ifdef X_GZIP_FONT_COMPRESSION + FindBestToScale, +#endif +#endif +#if XFONT_BDFFORMAT + FindBestToScale, + FindBestToScale, +#ifdef X_GZIP_FONT_COMPRESSION + FindBestToScale, +#endif +#endif +#if XFONT_PCFFORMAT + FindPmfToScale, +#endif +}; + +static unsigned long bitscaleGeneration = 0; /* initialization flag */ + +static fontProp fontNamePropTable[] = { + { "FOUNDRY", 0, atom }, + { "FAMILY_NAME", 0, atom }, + { "WEIGHT_NAME", 0, atom }, + { "SLANT", 0, atom }, + { "SETWIDTH_NAME", 0, atom }, + { "ADD_STYLE_NAME", 0, atom }, + { "PIXEL_SIZE", 0, pixel_size }, + { "POINT_SIZE", 0, point_size }, + { "RESOLUTION_X", 0, resolution_x }, + { "RESOLUTION_Y", 0, resolution_y }, + { "SPACING", 0, atom }, + { "AVERAGE_WIDTH", 0, average_width }, + { "CHARSET_REGISTRY", 0, atom }, + { "CHARSET_ENCODING", 0, truncate_atom }, + { "FONT", 0, fontname }, + { "RAW_ASCENT", 0, raw_ascent }, + { "RAW_DESCENT", 0, raw_descent }, + { "RAW_PIXEL_SIZE", 0, raw_pixelsize }, + { "RAW_POINT_SIZE", 0, raw_pointsize }, + { "RAW_AVERAGE_WIDTH", 0, raw_average_width } +}; + +#define TRANSFORM_POINT(matrix, x, y, dest) \ + ((dest)[0] = (matrix)[0] * (x) + (matrix)[2] * (y), \ + (dest)[1] = (matrix)[1] * (x) + (matrix)[3] * (y)) + +#define CHECK_EXTENT(lsb, rsb, desc, asc, data) \ + ((lsb) > (data)[0] ? (lsb) = (data)[0] : 0 , \ + (rsb) < (data)[0] ? (rsb) = (data)[0] : 0, \ + (-desc) > (data)[1] ? (desc) = -(data)[1] : 0 , \ + (asc) < (data)[1] ? (asc) = (data)[1] : 0) + +#define NPROPS (sizeof(fontNamePropTable) / sizeof(fontProp)) + +/* Warning: order of the next two tables is critically interdependent. + Location of "unscaled" properties at the end of fontPropTable[] + is important. */ + +static fontProp fontPropTable[] = { + { "MIN_SPACE", 0, scaledX }, + { "NORM_SPACE", 0, scaledX }, + { "MAX_SPACE", 0, scaledX }, + { "END_SPACE", 0, scaledX }, + { "AVG_CAPITAL_WIDTH", 0, scaledX }, + { "AVG_LOWERCASE_WIDTH", 0, scaledX }, + { "QUAD_WIDTH", 0, scaledX }, + { "FIGURE_WIDTH", 0, scaledX }, + { "SUPERSCRIPT_X", 0, scaledX }, + { "SUPERSCRIPT_Y", 0, scaledY }, + { "SUBSCRIPT_X", 0, scaledX }, + { "SUBSCRIPT_Y", 0, scaledY }, + { "SUPERSCRIPT_SIZE", 0, scaledY }, + { "SUBSCRIPT_SIZE", 0, scaledY }, + { "SMALL_CAP_SIZE", 0, scaledY }, + { "UNDERLINE_POSITION", 0, scaledY }, + { "UNDERLINE_THICKNESS", 0, scaledY }, + { "STRIKEOUT_ASCENT", 0, scaledY }, + { "STRIKEOUT_DESCENT", 0, scaledY }, + { "CAP_HEIGHT", 0, scaledY }, + { "X_HEIGHT", 0, scaledY }, + { "ITALIC_ANGLE", 0, unscaled }, + { "RELATIVE_SETWIDTH", 0, unscaled }, + { "RELATIVE_WEIGHT", 0, unscaled }, + { "WEIGHT", 0, unscaled }, + { "DESTINATION", 0, unscaled }, + { "PCL_FONT_NAME", 0, unscaled }, + { "_ADOBE_POSTSCRIPT_FONTNAME", 0, unscaled } +}; + +/* sleazy way to shut up the compiler */ +#define zerohack (enum scaleType)0 + +static fontProp rawFontPropTable[] = { + { "RAW_MIN_SPACE", 0, }, + { "RAW_NORM_SPACE", 0, }, + { "RAW_MAX_SPACE", 0, }, + { "RAW_END_SPACE", 0, }, + { "RAW_AVG_CAPITAL_WIDTH", 0, }, + { "RAW_AVG_LOWERCASE_WIDTH", 0, }, + { "RAW_QUAD_WIDTH", 0, }, + { "RAW_FIGURE_WIDTH", 0, }, + { "RAW_SUPERSCRIPT_X", 0, }, + { "RAW_SUPERSCRIPT_Y", 0, }, + { "RAW_SUBSCRIPT_X", 0, }, + { "RAW_SUBSCRIPT_Y", 0, }, + { "RAW_SUPERSCRIPT_SIZE", 0, }, + { "RAW_SUBSCRIPT_SIZE", 0, }, + { "RAW_SMALL_CAP_SIZE", 0, }, + { "RAW_UNDERLINE_POSITION", 0, }, + { "RAW_UNDERLINE_THICKNESS", 0, }, + { "RAW_STRIKEOUT_ASCENT", 0, }, + { "RAW_STRIKEOUT_DESCENT", 0, }, + { "RAW_CAP_HEIGHT", 0, }, + { "RAW_X_HEIGHT", 0, } +}; + +static void +initFontPropTable(void) +{ + int i; + fontProp *t; + + i = sizeof(fontNamePropTable) / sizeof(fontProp); + for (t = fontNamePropTable; i; i--, t++) + t->atom = MakeAtom(t->name, (unsigned) strlen(t->name), TRUE); + + i = sizeof(fontPropTable) / sizeof(fontProp); + for (t = fontPropTable; i; i--, t++) + t->atom = MakeAtom(t->name, (unsigned) strlen(t->name), TRUE); + + i = sizeof(rawFontPropTable) / sizeof(fontProp); + for (t = rawFontPropTable; i; i--, t++) + t->atom = MakeAtom(t->name, (unsigned) strlen(t->name), TRUE); +} + +#if 0 +static FontEntryPtr +GetScalableEntry (FontPathElementPtr fpe, FontNamePtr name) +{ + FontDirectoryPtr dir; + + dir = (FontDirectoryPtr) fpe->private; + return FontFileFindNameInDir (&dir->scalable, name); +} +#endif + +static double +get_matrix_horizontal_component(double *matrix) +{ + return hypot(matrix[0], matrix[1]); +} + +static double +get_matrix_vertical_component(double *matrix) +{ + return hypot(matrix[2], matrix[3]); +} + + +static Bool +ComputeScaleFactors(FontScalablePtr from, FontScalablePtr to, + double *dx, double *dy, double *sdx, double *sdy, + double *rescale_x) +{ + double srcpixelset, destpixelset, srcpixel, destpixel; + + srcpixelset = get_matrix_horizontal_component(from->pixel_matrix); + destpixelset = get_matrix_horizontal_component(to->pixel_matrix); + srcpixel = get_matrix_vertical_component(from->pixel_matrix); + destpixel = get_matrix_vertical_component(to->pixel_matrix); + + if (srcpixelset >= EPS) + { + *dx = destpixelset / srcpixelset; + *sdx = 1000.0 / srcpixelset; + } + else + *sdx = *dx = 0; + + *rescale_x = 1.0; + + /* If client specified a width, it overrides setsize; in this + context, we interpret width as applying to the font before any + rotation, even though that's not what is ultimately returned in + the width field. */ + if (from->width > 0 && to->width > 0 && fabs(*dx) > EPS) + { + double rescale = (double)to->width / (double)from->width; + + /* If the client specified a transformation matrix, the rescaling + for width does *not* override the setsize. Instead, just check + for consistency between the setsize from the matrix and the + setsize that would result from rescaling according to the width. + This assumes (perhaps naively) that the width is correctly + reported in the name. As an interesting side effect, this test + may result in choosing a different source bitmap (one that + scales consistently between the setsize *and* the width) than it + would choose if a width were not specified. Sort of a hidden + multiple-master functionality. */ + if ((to->values_supplied & PIXELSIZE_MASK) == PIXELSIZE_ARRAY || + (to->values_supplied & POINTSIZE_MASK) == POINTSIZE_ARRAY) + { + /* Reject if resulting width difference is >= 1 pixel */ + if (fabs(rescale * from->width - *dx * from->width) >= 10) + return FALSE; + } + else + { + *rescale_x = rescale/(*dx); + *dx = rescale; + } + } + + if (srcpixel >= EPS) + { + *dy = destpixel / srcpixel; + *sdy = 1000.0 / srcpixel; + } + else + *sdy = *dy = 0; + + return TRUE; +} + +/* favor enlargement over reduction because of aliasing resulting + from reduction */ +#define SCORE(m,s) \ +if (m >= 1.0) { \ + if (m == 1.0) \ + score += (16 * s); \ + else if (m == 2.0) \ + score += (4 * s); \ + else \ + score += (int)(((double)(3 * s)) / m); \ +} else { \ + score += (int)(((double)(2 * s)) * m); \ +} + +/* don't need to favor enlargement when looking for bitmap that can + be used unscalable */ +#define SCORE2(m,s) \ +if (m >= 1.0) \ + score += (int)(((double)(8 * s)) / m); \ +else \ + score += (int)(((double)(8 * s)) * m); + +static FontEntryPtr +FindBestToScale(FontPathElementPtr fpe, FontEntryPtr entry, + FontScalablePtr vals, FontScalablePtr best, + double *dxp, double *dyp, + double *sdxp, double *sdyp, + FontPathElementPtr *fpep) +{ + FontScalableRec temp; + int source, i; + int best_score, best_unscaled_score, + score; + double dx = 0.0, sdx = 0.0, dx_amount = 0.0, + dy = 0.0, sdy = 0.0, dy_amount = 0.0, + best_dx = 0.0, best_sdx = 0.0, best_dx_amount = 0.0, + best_dy = 0.0, best_sdy = 0.0, best_dy_amount = 0.0, + best_unscaled_sdx = 0.0, best_unscaled_sdy = 0.0, + rescale_x = 0.0, best_rescale_x = 0.0, + best_unscaled_rescale_x = 0.0; + FontEntryPtr zero; + FontNameRec zeroName; + char zeroChars[MAXFONTNAMELEN]; + FontDirectoryPtr dir; + FontScaledPtr scaled; + FontScalableExtraPtr extra; + FontScaledPtr best_scaled, best_unscaled; + FontPathElementPtr best_fpe = NULL, best_unscaled_fpe = NULL; + FontEntryPtr bitmap = NULL; + FontEntryPtr result; + int aliascount = 20; + FontPathElementPtr bitmap_fpe = NULL; + FontNameRec xlfdName; + + /* find the best match */ + rescale_x = 1.0; + best_scaled = 0; + best_score = 0; + best_unscaled = 0; + best_unscaled_score = -1; + best_dx_amount = best_dy_amount = HUGE_VAL; + memcpy (zeroChars, entry->name.name, entry->name.length); + zeroChars[entry->name.length] = '\0'; + zeroName.name = zeroChars; + FontParseXLFDName (zeroChars, &temp, FONT_XLFD_REPLACE_ZERO); + zeroName.length = strlen (zeroChars); + zeroName.ndashes = entry->name.ndashes; + xlfdName.name = vals->xlfdName; + xlfdName.length = strlen(xlfdName.name); + xlfdName.ndashes = FontFileCountDashes(xlfdName.name, xlfdName.length); + restart_bestscale_loop: ; + /* + * Look through all the registered bitmap sources for + * the same zero name as ours; entries along that one + * can be scaled as desired. + */ + for (source = 0; source < FontFileBitmapSources.count; source++) + { + /* There might already be a bitmap that satisfies the request + but didn't have a zero name that was found by the scalable + font matching logic. Keep track if there is. */ + if (bitmap == NULL && vals->xlfdName != NULL) + { + bitmap_fpe = FontFileBitmapSources.fpe[source]; + dir = (FontDirectoryPtr) bitmap_fpe->private; + bitmap = FontFileFindNameInDir (&dir->nonScalable, &xlfdName); + if (bitmap && bitmap->type != FONT_ENTRY_BITMAP) + { + if (bitmap->type == FONT_ENTRY_ALIAS && aliascount > 0) + { + aliascount--; + xlfdName.name = bitmap->u.alias.resolved; + xlfdName.length = strlen(xlfdName.name); + xlfdName.ndashes = FontFileCountDashes(xlfdName.name, + xlfdName.length); + bitmap = NULL; + goto restart_bestscale_loop; + } + else + bitmap = NULL; + } + } + + if (FontFileBitmapSources.fpe[source] == fpe) + zero = entry; + else + { + dir = (FontDirectoryPtr) FontFileBitmapSources.fpe[source]->private; + zero = FontFileFindNameInDir (&dir->scalable, &zeroName); + if (!zero) + continue; + } + extra = zero->u.scalable.extra; + for (i = 0; i < extra->numScaled; i++) + { + scaled = &extra->scaled[i]; + if (!scaled->bitmap) + continue; + if (!ComputeScaleFactors(&scaled->vals, vals, &dx, &dy, &sdx, &sdy, + &rescale_x)) + continue; + score = 0; + dx_amount = dx; + dy_amount = dy; + SCORE(dy_amount, 10); + SCORE(dx_amount, 1); + if ((score > best_score) || + ((score == best_score) && + ((dy_amount < best_dy_amount) || + ((dy_amount == best_dy_amount) && + (dx_amount < best_dx_amount))))) + { + best_fpe = FontFileBitmapSources.fpe[source]; + best_scaled = scaled; + best_score = score; + best_dx = dx; + best_dy = dy; + best_sdx = sdx; + best_sdy = sdy; + best_dx_amount = dx_amount; + best_dy_amount = dy_amount; + best_rescale_x = rescale_x; + } + /* Is this font a candidate for use without ugly rescaling? */ + if (fabs(dx) > EPS && fabs(dy) > EPS && + fabs(vals->pixel_matrix[0] * rescale_x - + scaled->vals.pixel_matrix[0]) < 1 && + fabs(vals->pixel_matrix[1] * rescale_x - + scaled->vals.pixel_matrix[1]) < EPS && + fabs(vals->pixel_matrix[2] - + scaled->vals.pixel_matrix[2]) < EPS && + fabs(vals->pixel_matrix[3] - + scaled->vals.pixel_matrix[3]) < 1) + { + /* Yes. The pixel sizes are close on the diagonal and + extremely close off the diagonal. */ + score = 0; + SCORE2(vals->pixel_matrix[3] / + scaled->vals.pixel_matrix[3], 10); + SCORE2(vals->pixel_matrix[0] * rescale_x / + scaled->vals.pixel_matrix[0], 1); + if (score > best_unscaled_score) + { + best_unscaled_fpe = FontFileBitmapSources.fpe[source]; + best_unscaled = scaled; + best_unscaled_sdx = sdx / dx; + best_unscaled_sdy = sdy / dy; + best_unscaled_score = score; + best_unscaled_rescale_x = rescale_x; + } + } + } + } + if (best_unscaled) + { + *best = best_unscaled->vals; + *fpep = best_unscaled_fpe; + *dxp = 1.0; + *dyp = 1.0; + *sdxp = best_unscaled_sdx; + *sdyp = best_unscaled_sdy; + rescale_x = best_unscaled_rescale_x; + result = best_unscaled->bitmap; + } + else if (best_scaled) + { + *best = best_scaled->vals; + *fpep = best_fpe; + *dxp = best_dx; + *dyp = best_dy; + *sdxp = best_sdx; + *sdyp = best_sdy; + rescale_x = best_rescale_x; + result = best_scaled->bitmap; + } + else + result = NULL; + + if (bitmap != NULL && (result == NULL || *dxp != 1.0 || *dyp != 1.0)) + { + *fpep = bitmap_fpe; + FontParseXLFDName (bitmap->name.name, best, FONT_XLFD_REPLACE_NONE); + if (ComputeScaleFactors(best, best, dxp, dyp, sdxp, sdyp, &rescale_x)) + result = bitmap; + else + result = NULL; + } + + if (result && rescale_x != 1.0) + { + /* We have rescaled horizontally due to an XLFD width field. Change + the matrix appropriately */ + vals->pixel_matrix[0] *= rescale_x; + vals->pixel_matrix[1] *= rescale_x; +#ifdef NOTDEF + /* This would force the pointsize and pixelsize fields in the + FONT property to display as matrices to more accurately + report the font being supplied. It might also break existing + applications that expect a single number in that field. */ + vals->values_supplied = + vals->values_supplied & ~(PIXELSIZE_MASK | POINTSIZE_MASK) | + PIXELSIZE_ARRAY; +#else /* NOTDEF */ + vals->values_supplied = vals->values_supplied & ~POINTSIZE_MASK; +#endif /* NOTDEF */ + /* Recompute and reround the FontScalablePtr values after + rescaling for the new width. */ + FontFileCompleteXLFD(vals, vals); + } + + return result; +} + +static FontEntryPtr +FindPmfToScale(FontPathElementPtr fpe, FontEntryPtr entry, + FontScalablePtr vals, FontScalablePtr best, + double *dxp, double *dyp, + double *sdxp, double *sdyp, + FontPathElementPtr *fpep) +{ + FontEntryPtr result = NULL; + FontScaledPtr scaled; + FontScalableExtraPtr extra; + int i; + + extra = entry->u.scalable.extra; + for (i = 0; i < extra->numScaled; i++) + { + double rescale_x; + + scaled = &extra->scaled[i]; + if (!scaled->bitmap) + continue; + if (!ComputeScaleFactors(&scaled->vals, vals, dxp, dyp, sdxp, sdyp, + &rescale_x)) + continue; + *best = scaled->vals; + *fpep = fpe; + result = scaled->bitmap; + if (rescale_x != 1.0) + { + /* We have rescaled horizontally due to an XLFD width field. Change + the matrix appropriately */ + vals->pixel_matrix[0] *= rescale_x; + vals->pixel_matrix[1] *= rescale_x; +#ifdef NOTDEF + /* This would force the pointsize and pixelsize fields in the + FONT property to display as matrices to more accurately + report the font being supplied. It might also break existing + applications that expect a single number in that field. */ + vals->values_supplied = + vals->values_supplied & ~(PIXELSIZE_MASK | POINTSIZE_MASK) | + PIXELSIZE_ARRAY; +#else /* NOTDEF */ + vals->values_supplied = vals->values_supplied & ~POINTSIZE_MASK; +#endif /* NOTDEF */ + /* Recompute and reround the FontScalablePtr values after + rescaling for the new width. */ + FontFileCompleteXLFD(vals, vals); + } + break; + } + return result; +} + +static long +doround(double x) +{ + return (x >= 0) ? (long)(x + .5) : (long)(x - .5); +} + +static int +computeProps(FontPropPtr pf, char *wasStringProp, + FontPropPtr npf, char *isStringProp, + unsigned int nprops, double xfactor, double yfactor, + double sXfactor, double sYfactor) +{ + int n; + int count; + fontProp *t; + double rawfactor = 0.0; + + for (count = 0; nprops > 0; nprops--, pf++, wasStringProp++) { + n = sizeof(fontPropTable) / sizeof(fontProp); + for (t = fontPropTable; n && (t->atom != pf->name); n--, t++); + if (!n) + continue; + + switch (t->type) { + case scaledX: + npf->value = doround(xfactor * (double)pf->value); + rawfactor = sXfactor; + break; + case scaledY: + npf->value = doround(yfactor * (double)pf->value); + rawfactor = sYfactor; + break; + case unscaled: + npf->value = pf->value; + npf->name = pf->name; + npf++; + count++; + *isStringProp++ = *wasStringProp; + break; + default: + break; + } + if (t->type != unscaled) + { + npf->name = pf->name; + npf++; + count++; + npf->value = doround(rawfactor * (double)pf->value); + npf->name = rawFontPropTable[t - fontPropTable].atom; + npf++; + count++; + *isStringProp++ = *wasStringProp; + *isStringProp++ = *wasStringProp; + } + } + return count; +} + + +static int +ComputeScaledProperties(FontInfoPtr sourceFontInfo, /* the font to be scaled */ + char *name, /* name of resulting font */ + FontScalablePtr vals, + double dx, double dy, /* scale factors in x and y */ + double sdx, double sdy, /* directions */ + long sWidth, /* 1000-pixel average width */ + FontPropPtr *pProps, /* returns properties; + preallocated */ + char **pIsStringProp) /* return booleans; + preallocated */ +{ + int n; + char *ptr1 = NULL, *ptr2 = NULL; + char *ptr3; + FontPropPtr fp; + fontProp *fpt; + char *isStringProp; + int nProps; + + if (bitscaleGeneration != serverGeneration) { + initFontPropTable(); + bitscaleGeneration = serverGeneration; + } + nProps = NPROPS + 1 + sizeof(fontPropTable) / sizeof(fontProp) + + sizeof(rawFontPropTable) / sizeof(fontProp); + fp = (FontPropPtr) xalloc(sizeof(FontPropRec) * nProps); + *pProps = fp; + if (!fp) { + fprintf(stderr, "Error: Couldn't allocate font properties (%ld*%d)\n", + (unsigned long)sizeof(FontPropRec), nProps); + return 1; + } + isStringProp = (char *) xalloc (nProps); + *pIsStringProp = isStringProp; + if (!isStringProp) + { + fprintf(stderr, "Error: Couldn't allocate isStringProp (%d)\n", nProps); + xfree (fp); + return 1; + } + ptr2 = name; + for (fpt = fontNamePropTable, n = NPROPS; + n; + fp++, fpt++, n--, isStringProp++) + { + + if (*ptr2) + { + ptr1 = ptr2 + 1; + if (!(ptr2 = strchr(ptr1, '-'))) ptr2 = strchr(ptr1, '\0'); + } + + *isStringProp = 0; + switch (fpt->type) { + case atom: + fp->value = MakeAtom(ptr1, ptr2 - ptr1, TRUE); + *isStringProp = 1; + break; + case truncate_atom: + for (ptr3 = ptr1; *ptr3; ptr3++) + if (*ptr3 == '[') + break; + if (!*ptr3) ptr3 = ptr2; + fp->value = MakeAtom(ptr1, ptr3 - ptr1, TRUE); + *isStringProp = 1; + break; + case pixel_size: + fp->value = doround(vals->pixel_matrix[3]); + break; + case point_size: + fp->value = doround(vals->point_matrix[3] * 10.0); + break; + case resolution_x: + fp->value = vals->x; + break; + case resolution_y: + fp->value = vals->y; + break; + case average_width: + fp->value = vals->width; + break; + case fontname: + fp->value = MakeAtom(name, strlen(name), TRUE); + *isStringProp = 1; + break; + case raw_ascent: + fp->value = sourceFontInfo->fontAscent * sdy; + break; + case raw_descent: + fp->value = sourceFontInfo->fontDescent * sdy; + break; + case raw_pointsize: + fp->value = (long)(72270.0 / (double)vals->y + .5); + break; + case raw_pixelsize: + fp->value = 1000; + break; + case raw_average_width: + fp->value = sWidth; + break; + default: + break; + } + fp->name = fpt->atom; + } + n = NPROPS; + n += computeProps(sourceFontInfo->props, sourceFontInfo->isStringProp, + fp, isStringProp, sourceFontInfo->nprops, dx, dy, + sdx, sdy); + return n; +} + + +static int +compute_xform_matrix(FontScalablePtr vals, double dx, double dy, + double *xform, double *inv_xform, + double *xmult, double *ymult) +{ + double det; + double pixel = get_matrix_vertical_component(vals->pixel_matrix); + double pixelset = get_matrix_horizontal_component(vals->pixel_matrix); + + if (pixel < EPS || pixelset < EPS) return 0; + + /* Initialize the transformation matrix to the scaling factors */ + xform[0] = dx / pixelset; + xform[1] = xform[2] = 0.0; + xform[3] = dy / pixel; + +/* Inline matrix multiply -- somewhat ugly to minimize register usage */ +#define MULTIPLY_XFORM(a,b,c,d) \ +{ \ + register double aa = (a), bb = (b), cc = (c), dd = (d); \ + register double temp; \ + temp = aa * xform[0] + cc * xform[1]; \ + aa = aa * xform[2] + cc * xform[3]; \ + xform[1] = bb * xform[0] + dd * xform[1]; \ + xform[3] = bb * xform[2] + dd * xform[3]; \ + xform[0] = temp; \ + xform[2] = aa; \ +} + + /* Rescale the transformation matrix for size of source font */ + MULTIPLY_XFORM(vals->pixel_matrix[0], + vals->pixel_matrix[1], + vals->pixel_matrix[2], + vals->pixel_matrix[3]); + + *xmult = xform[0]; + *ymult = xform[3]; + + + if (inv_xform == NULL) return 1; + + /* Compute the determinant for use in inverting the matrix. */ + det = xform[0] * xform[3] - xform[1] * xform[2]; + + /* If the determinant is tiny or zero, give up */ + if (fabs(det) < EPS) return 0; + + /* Compute the inverse */ + inv_xform[0] = xform[3] / det; + inv_xform[1] = -xform[1] / det; + inv_xform[2] = -xform[2] / det; + inv_xform[3] = xform[0] / det; + + return 1; +} + +/* + * ScaleFont + * returns a pointer to the new scaled font, or NULL (due to AllocError). + */ +static FontPtr +ScaleFont(FontPtr opf, /* originating font */ + double widthMult, /* glyphs width scale factor */ + double heightMult, /* glyphs height scale factor */ + double sWidthMult, /* scalable glyphs width scale factor */ + double sHeightMult, /* scalable glyphs height scale factor */ + FontScalablePtr vals, + double *newWidthMult, /* return: X component of glyphs width + scale factor */ + double *newHeightMult, /* return: Y component of glyphs height + scale factor */ + long *sWidth) /* return: average 1000-pixel width */ +{ + FontPtr pf; + FontInfoPtr pfi, + opfi; + BitmapFontPtr bitmapFont, + obitmapFont; + CharInfoPtr pci, + opci; + int nchars = 0; /* how many characters in the font */ + int i; + int firstCol, lastCol, firstRow, lastRow; + double xform[4], inv_xform[4]; + double xmult, ymult; + int totalwidth = 0, totalchars = 0; +#define OLDINDEX(i) (((i)/(lastCol - firstCol + 1) + \ + firstRow - opf->info.firstRow) * \ + (opf->info.lastCol - opf->info.firstCol + 1) + \ + (i)%(lastCol - firstCol + 1) + \ + firstCol - opf->info.firstCol) + + *sWidth = 0; + + opfi = &opf->info; + obitmapFont = (BitmapFontPtr) opf->fontPrivate; + + bitmapFont = 0; + if (!(pf = CreateFontRec())) { + fprintf(stderr, "Error: Couldn't allocate FontRec (%ld)\n", + (unsigned long)sizeof(FontRec)); + goto bail; + } + pf->refcnt = 0; + pf->bit = opf->bit; + pf->byte = opf->byte; + pf->glyph = opf->glyph; + pf->scan = opf->scan; + + pf->get_glyphs = bitmapGetGlyphs; + pf->get_metrics = bitmapGetMetrics; + pf->unload_font = bitmapUnloadScalable; + pf->unload_glyphs = NULL; + + pfi = &pf->info; + *pfi = *opfi; + /* If charset subsetting specified in vals, determine what our range + needs to be for the output font */ + if (vals->nranges) + { + int i; + + pfi->allExist = 0; + firstCol = 255; + lastCol = 0; + firstRow = 255; + lastRow = 0; + + for (i = 0; i < vals->nranges; i++) + { + if (vals->ranges[i].min_char_high != vals->ranges[i].max_char_high) + { + firstCol = opfi->firstCol; + lastCol = opfi->lastCol; + } + if (firstCol > vals->ranges[i].min_char_low) + firstCol = vals->ranges[i].min_char_low; + if (lastCol < vals->ranges[i].max_char_low) + lastCol = vals->ranges[i].max_char_low; + if (firstRow > vals->ranges[i].min_char_high) + firstRow = vals->ranges[i].min_char_high; + if (lastRow < vals->ranges[i].max_char_high) + lastRow = vals->ranges[i].max_char_high; + } + + if (firstCol > lastCol || firstRow > lastRow) + goto bail; + + if (firstCol < opfi->firstCol) + firstCol = opfi->firstCol; + if (lastCol > opfi->lastCol) + lastCol = opfi->lastCol; + if (firstRow < opfi->firstRow) + firstRow = opfi->firstRow; + if (lastRow > opfi->lastRow) + lastRow = opfi->lastRow; + } + else + { + firstCol = opfi->firstCol; + lastCol = opfi->lastCol; + firstRow = opfi->firstRow; + lastRow = opfi->lastRow; + } + + bitmapFont = (BitmapFontPtr) xalloc(sizeof(BitmapFontRec)); + if (!bitmapFont) { + fprintf(stderr, "Error: Couldn't allocate bitmapFont (%ld)\n", + (unsigned long)sizeof(BitmapFontRec)); + goto bail; + } + nchars = (lastRow - firstRow + 1) * (lastCol - firstCol + 1); + pfi->firstRow = firstRow; + pfi->lastRow = lastRow; + pfi->firstCol = firstCol; + pfi->lastCol = lastCol; + pf->fontPrivate = (pointer) bitmapFont; + bitmapFont->version_num = obitmapFont->version_num; + bitmapFont->num_chars = nchars; + bitmapFont->num_tables = obitmapFont->num_tables; + bitmapFont->metrics = 0; + bitmapFont->ink_metrics = 0; + bitmapFont->bitmaps = 0; + bitmapFont->encoding = 0; + bitmapFont->bitmapExtra = 0; + bitmapFont->pDefault = 0; + bitmapFont->metrics = (CharInfoPtr) xalloc(nchars * sizeof(CharInfoRec)); + if (!bitmapFont->metrics) { + fprintf(stderr, "Error: Couldn't allocate metrics (%d*%ld)\n", + nchars, (unsigned long)sizeof(CharInfoRec)); + goto bail; + } + bitmapFont->encoding = + (CharInfoPtr **) xcalloc(NUM_SEGMENTS(nchars), + sizeof(CharInfoPtr*)); + if (!bitmapFont->encoding) { + fprintf(stderr, "Error: Couldn't allocate encoding (%d*%ld)\n", + nchars, (unsigned long)sizeof(CharInfoPtr)); + goto bail; + } + +#undef MAXSHORT +#define MAXSHORT 32767 +#undef MINSHORT +#define MINSHORT -32768 + + pfi->anamorphic = FALSE; + if (heightMult != widthMult) + pfi->anamorphic = TRUE; + pfi->cachable = TRUE; + + if (!compute_xform_matrix(vals, widthMult, heightMult, xform, + inv_xform, &xmult, &ymult)) + goto bail; + + pfi->fontAscent = opfi->fontAscent * ymult; + pfi->fontDescent = opfi->fontDescent * ymult; + + pfi->minbounds.leftSideBearing = MAXSHORT; + pfi->minbounds.rightSideBearing = MAXSHORT; + pfi->minbounds.ascent = MAXSHORT; + pfi->minbounds.descent = MAXSHORT; + pfi->minbounds.characterWidth = MAXSHORT; + pfi->minbounds.attributes = MAXSHORT; + + pfi->maxbounds.leftSideBearing = MINSHORT; + pfi->maxbounds.rightSideBearing = MINSHORT; + pfi->maxbounds.ascent = MINSHORT; + pfi->maxbounds.descent = MINSHORT; + pfi->maxbounds.characterWidth = MINSHORT; + pfi->maxbounds.attributes = MINSHORT; + + /* Compute the transformation and inverse transformation matrices. + Can fail if the determinant is zero. */ + + pci = bitmapFont->metrics; + for (i = 0; i < nchars; i++) + { + if ((opci = ACCESSENCODING(obitmapFont->encoding,OLDINDEX(i)))) + { + double newlsb, newrsb, newdesc, newasc, point[2]; + +#define minchar(p) ((p).min_char_low + ((p).min_char_high << 8)) +#define maxchar(p) ((p).max_char_low + ((p).max_char_high << 8)) + + if (vals->nranges) + { + int row = i / (lastCol - firstCol + 1) + firstRow; + int col = i % (lastCol - firstCol + 1) + firstCol; + int ch = (row << 8) + col; + int j; + for (j = 0; j < vals->nranges; j++) + if (ch >= minchar(vals->ranges[j]) && + ch <= maxchar(vals->ranges[j])) + break; + if (j == vals->nranges) + { + continue; + } + } + + if (opci->metrics.leftSideBearing == 0 && + opci->metrics.rightSideBearing == 0 && + opci->metrics.ascent == 0 && + opci->metrics.descent == 0 && + opci->metrics.characterWidth == 0) + { + continue; + } + + if(!bitmapFont->encoding[SEGMENT_MAJOR(i)]) { + bitmapFont->encoding[SEGMENT_MAJOR(i)]= + (CharInfoPtr*)xcalloc(BITMAP_FONT_SEGMENT_SIZE, + sizeof(CharInfoPtr)); + if(!bitmapFont->encoding[SEGMENT_MAJOR(i)]) + goto bail; + } + ACCESSENCODINGL(bitmapFont->encoding, i) = pci; + + /* Compute new extents for this glyph */ + TRANSFORM_POINT(xform, + opci->metrics.leftSideBearing, + -opci->metrics.descent, + point); + newlsb = point[0]; + newrsb = newlsb; + newdesc = -point[1]; + newasc = -newdesc; + TRANSFORM_POINT(xform, + opci->metrics.leftSideBearing, + opci->metrics.ascent, + point); + CHECK_EXTENT(newlsb, newrsb, newdesc, newasc, point); + TRANSFORM_POINT(xform, + opci->metrics.rightSideBearing, + -opci->metrics.descent, + point); + CHECK_EXTENT(newlsb, newrsb, newdesc, newasc, point); + TRANSFORM_POINT(xform, + opci->metrics.rightSideBearing, + opci->metrics.ascent, + point); + CHECK_EXTENT(newlsb, newrsb, newdesc, newasc, point); + + pci->metrics.leftSideBearing = (int)floor(newlsb); + pci->metrics.rightSideBearing = (int)floor(newrsb + .5); + pci->metrics.descent = (int)ceil(newdesc); + pci->metrics.ascent = (int)floor(newasc + .5); + /* Accumulate total width of characters before transformation, + to ascertain predominant direction of font. */ + totalwidth += opci->metrics.characterWidth; + pci->metrics.characterWidth = + doround((double)opci->metrics.characterWidth * xmult); + pci->metrics.attributes = + doround((double)opci->metrics.characterWidth * sWidthMult); + if (!pci->metrics.characterWidth) + { + /* Since transformation may shrink width, height, and + escapement to zero, make sure existing characters + are not mistaken for undefined characters. */ + + if (pci->metrics.rightSideBearing == + pci->metrics.leftSideBearing) + pci->metrics.rightSideBearing++; + if (pci->metrics.ascent == -pci->metrics.descent) + pci->metrics.ascent++; + } + + pci++; + } + } + + + /* + * For each character, set the per-character metrics, scale the glyph, and + * check per-font minbounds and maxbounds character information. + */ + + pci = bitmapFont->metrics; + for (i = 0; i < nchars; i++) + { + if ((pci = ACCESSENCODING(bitmapFont->encoding,i)) && + (opci = ACCESSENCODING(obitmapFont->encoding,OLDINDEX(i)))) + { + totalchars++; + *sWidth += abs((int)(INT16)pci->metrics.attributes); +#define MINMAX(field) \ + if (pfi->minbounds.field > pci->metrics.field) \ + pfi->minbounds.field = pci->metrics.field; \ + if (pfi->maxbounds.field < pci->metrics.field) \ + pfi->maxbounds.field = pci->metrics.field + + MINMAX(leftSideBearing); + MINMAX(rightSideBearing); + MINMAX(ascent); + MINMAX(descent); + MINMAX(characterWidth); + + /* Hack: Cast attributes into a signed quantity. Tread lightly + for now and don't go changing the global Xproto.h file */ + if ((INT16)pfi->minbounds.attributes > + (INT16)pci->metrics.attributes) + pfi->minbounds.attributes = pci->metrics.attributes; + if ((INT16)pfi->maxbounds.attributes < + (INT16)pci->metrics.attributes) + pfi->maxbounds.attributes = pci->metrics.attributes; +#undef MINMAX + } + } + pfi->ink_minbounds = pfi->minbounds; + pfi->ink_maxbounds = pfi->maxbounds; + if (totalchars) + { + *sWidth = (*sWidth * 10 + totalchars / 2) / totalchars; + if (totalwidth < 0) + { + /* Dominant direction is R->L */ + *sWidth = -*sWidth; + } + + if (pfi->minbounds.characterWidth == pfi->maxbounds.characterWidth) + vals->width = pfi->minbounds.characterWidth * 10; + else + vals->width = doround((double)*sWidth * vals->pixel_matrix[0] / + 1000.0); + } + else + { + vals->width = 0; + *sWidth = 0; + } + FontComputeInfoAccelerators (pfi); + + if (pfi->defaultCh != (unsigned short) NO_SUCH_CHAR) { + unsigned int r, + c, + cols; + + r = pfi->defaultCh >> 8; + c = pfi->defaultCh & 0xFF; + if (pfi->firstRow <= r && r <= pfi->lastRow && + pfi->firstCol <= c && c <= pfi->lastCol) { + cols = pfi->lastCol - pfi->firstCol + 1; + r = r - pfi->firstRow; + c = c - pfi->firstCol; + bitmapFont->pDefault = + ACCESSENCODING(bitmapFont->encoding, r * cols + c); + } + } + + *newWidthMult = xmult; + *newHeightMult = ymult; + return pf; +bail: + if (pf) + xfree(pf); + if (bitmapFont) { + xfree(bitmapFont->metrics); + xfree(bitmapFont->ink_metrics); + xfree(bitmapFont->bitmaps); + if(bitmapFont->encoding) + for(i=0; i<NUM_SEGMENTS(nchars); i++) + xfree(bitmapFont->encoding[i]); + xfree(bitmapFont->encoding); + } + return NULL; +} + +static void +ScaleBitmap(FontPtr pFont, CharInfoPtr opci, CharInfoPtr pci, + double *inv_xform, double widthMult, double heightMult) +{ + register char *bitmap, /* The bits */ + *newBitmap; + register int bpr, /* Padding information */ + newBpr; + int width, /* Extents information */ + height, + newWidth, + newHeight; + register int row, /* Loop variables */ + col; + INT32 deltaX, /* Increments for resampling loop */ + deltaY; + INT32 xValue, /* Subscripts for resampling loop */ + yValue; + double point[2]; + unsigned char *char_grayscale = 0; + INT32 *diffusion_workspace = NULL, *thisrow = NULL, + *nextrow = NULL, pixmult = 0; + int box_x = 0, box_y = 0; + + static unsigned char masklsb[] = + { 0x1, 0x2, 0x4, 0x8, 0x10, 0x20, 0x40, 0x80 }; + static unsigned char maskmsb[] = + { 0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1 }; + unsigned char *mask = (pFont->bit == LSBFirst ? masklsb : maskmsb); + + + bitmap = opci->bits; + newBitmap = pci->bits; + width = GLYPHWIDTHPIXELS(opci); + height = GLYPHHEIGHTPIXELS(opci); + newWidth = GLYPHWIDTHPIXELS(pci); + newHeight = GLYPHHEIGHTPIXELS(pci); + if (!newWidth || !newHeight || !width || !height) + return; + + bpr = BYTES_PER_ROW(width, pFont->glyph); + newBpr = BYTES_PER_ROW(newWidth, pFont->glyph); + + if (widthMult > 0.0 && heightMult > 0.0 && + (widthMult < 1.0 || heightMult < 1.0)) + { + /* We are reducing in one or both dimensions. In an attempt to + reduce aliasing, we'll antialias by passing the original + glyph through a low-pass box filter (which results in a + grayscale image), then use error diffusion to create bitonal + output in the resampling loop. */ + + /* First compute the sizes of the box filter */ + widthMult = ceil(1.0 / widthMult); + heightMult = ceil(1.0 / heightMult); + box_x = width / 2; + box_y = height / 2; + if (widthMult < (double)box_x) box_x = (int)widthMult; + if (heightMult < (double)box_y) box_y = (int)heightMult; + /* The pixmult value (below) is used to darken the image before + we perform error diffusion: a necessary concession to the + fact that it's very difficult to generate readable halftoned + glyphs. The degree of darkening is proportional to the size + of the blurring filter, hence inversely proportional to the + darkness of the lightest gray that results from antialiasing. + The result is that characters that exercise this logic (those + generated by reducing from a larger source font) tend to err + on the side of being too bold instead of being too light to + be readable. */ + pixmult = box_x * box_y * 192; + + if (box_x > 1 || box_y > 1) + { + /* Looks like we need to anti-alias. Create a workspace to + contain the grayscale character plus an additional row and + column for scratch */ + char_grayscale = + (unsigned char *)xalloc((width + 1) * (height + 1)); + if (char_grayscale) + { + diffusion_workspace = + (INT32 *)xalloc((newWidth + 2) * 2 * sizeof(int)); + if (!diffusion_workspace) + { + fprintf(stderr, "Warning: Couldn't allocate diffusion" + " workspace (%ld)\n", + (newWidth + 2) * 2 * (unsigned long)sizeof(int)); + xfree(char_grayscale); + char_grayscale = (unsigned char *)0; + } + /* Initialize our error diffusion workspace for later use */ + bzero((char *)diffusion_workspace + sizeof(INT32), + (newWidth + 3) * sizeof(int)); + thisrow = diffusion_workspace + 1; + nextrow = diffusion_workspace + newWidth + 3; + } else { + fprintf(stderr, "Warning: Couldn't allocate character grayscale (%d)\n", (width + 1) * (height + 1)); + } + } + } + + if (char_grayscale) + { + /* We will be doing antialiasing. First copy the bitmap into + our buffer, mapping input range [0,1] to output range + [0,255]. */ + register unsigned char *srcptr, *dstptr; + srcptr = (unsigned char *)bitmap; + dstptr = char_grayscale; + for (row = 0; row < height; row++) + { + for (col = 0; col < width; col++) + *dstptr++ = (srcptr[col >> 3] & mask[col & 0x7]) ? 255 : 0; + srcptr += bpr; /* On to next row of source */ + dstptr++; /* Skip scratch column in dest */ + } + if (box_x > 1) + { + /* Our box filter has a width > 1... let's filter the rows */ + + int right_width = box_x / 2; + int left_width = box_x - right_width - 1; + + for (row = 0; row < height; row++) + { + int sum = 0; + int left_size = 0, right_size = 0; + + srcptr = char_grayscale + (width + 1) * row; + dstptr = char_grayscale + (width + 1) * height; /* scratch */ + + /* We've computed the shape of our full box filter. Now + compute the right-hand part of the moving sum */ + for (right_size = 0; right_size < right_width; right_size++) + sum += srcptr[right_size]; + + /* Now start moving the sum, growing the box filter, and + dropping averages into our scratch buffer */ + for (left_size = 0; left_size < left_width; left_size++) + { + sum += srcptr[right_width]; + *dstptr++ = sum / (left_size + right_width + 1); + srcptr++; + } + + /* The box filter has reached full width... continue + computation of moving average until the right side + hits the wall. */ + for (col = left_size; col + right_size < width; col++) + { + sum += srcptr[right_width]; + *dstptr++ = sum / box_x; + sum -= srcptr[-left_width]; + srcptr++; + } + + /* Collapse the right side of the box filter */ + for (; right_size > 0; right_size--) + { + *dstptr++ = sum / (left_width + right_size); + sum -= srcptr[-left_width]; + srcptr++; + } + + /* Done with the row... copy dest back over source */ + memmove(char_grayscale + (width + 1) * row, + char_grayscale + (width + 1) * height, + width); + } + } + if (box_y > 1) + { + /* Our box filter has a height > 1... let's filter the columns */ + + int bottom_height = box_y / 2; + int top_height = box_y - bottom_height - 1; + + for (col = 0; col < width; col++) + { + int sum = 0; + int top_size = 0, bottom_size = 0; + + srcptr = char_grayscale + col; + dstptr = char_grayscale + width; /* scratch */ + + /* We've computed the shape of our full box filter. Now + compute the bottom part of the moving sum */ + for (bottom_size = 0; + bottom_size < bottom_height; + bottom_size++) + sum += srcptr[bottom_size * (width + 1)]; + + /* Now start moving the sum, growing the box filter, and + dropping averages into our scratch buffer */ + for (top_size = 0; top_size < top_height; top_size++) + { + sum += srcptr[bottom_height * (width + 1)]; + *dstptr = sum / (top_size + bottom_height + 1); + dstptr += width + 1; + srcptr += width + 1; + } + + /* The box filter has reached full height... continue + computation of moving average until the bottom + hits the wall. */ + for (row = top_size; row + bottom_size < height; row++) + { + sum += srcptr[bottom_height * (width + 1)]; + *dstptr = sum / box_y; + dstptr += width + 1; + sum -= srcptr[-top_height * (width + 1)]; + srcptr += width + 1; + } + + /* Collapse the bottom of the box filter */ + for (; bottom_size > 0; bottom_size--) + { + *dstptr = sum / (top_height + bottom_size); + dstptr += width + 1; + sum -= srcptr[-top_height * (width + 1)]; + srcptr += width + 1; + } + + /* Done with the column... copy dest back over source */ + + dstptr = char_grayscale + col; + srcptr = char_grayscale + width; /* scratch */ + for (row = 0; row < height; row++) + { + *dstptr = *srcptr; + dstptr += width + 1; + srcptr += width + 1; + } + } + } + + /* Increase the grayvalue to increase ink a bit */ + srcptr = char_grayscale; + for (row = 0; row < height; row++) + { + for (col = 0; col < width; col++) + { + register int pixvalue = (int)*srcptr * pixmult / 256; + if (pixvalue > 255) pixvalue = 255; + *srcptr = pixvalue; + srcptr++; + } + srcptr++; + } + } + + /* Compute the increment values for the resampling loop */ + TRANSFORM_POINT(inv_xform, 1, 0, point); + deltaX = (INT32)(point[0] * 65536.0); + deltaY = (INT32)(-point[1] * 65536.0); + + /* Resampling loop: resamples original glyph for generation of new + glyph in transformed coordinate system. */ + + for (row = 0; row < newHeight; row++) + { + /* Compute inverse transformation for start of this row */ + TRANSFORM_POINT(inv_xform, + (double)(pci->metrics.leftSideBearing) + .5, + (double)(pci->metrics.ascent - row) - .5, + point); + + /* Adjust for coordinate system to get resampling point */ + point[0] -= opci->metrics.leftSideBearing; + point[1] = opci->metrics.ascent - point[1]; + + /* Convert to integer coordinates */ + xValue = (INT32)(point[0] * 65536.0); + yValue = (INT32)(point[1] * 65536.0); + + if (char_grayscale) + { + INT32 *temp; + for (col = 0; col < newWidth; col++) + { + register int x = xValue >> 16, y = yValue >> 16; + int pixvalue, error; + + pixvalue = ((x >= 0 && x < width && y >= 0 && y < height) ? + char_grayscale[x + y * (width + 1)] : 0) + + thisrow[col] / 16; + if (pixvalue > 255) pixvalue = 255; + else if (pixvalue < 0) pixvalue = 0; + + /* Choose the bit value and set resulting error value */ + if (pixvalue >= 128) + { + newBitmap[(col >> 3) + row * newBpr] |= mask[col & 0x7]; + error = pixvalue - 255; + } + else + error = -pixvalue; + + /* Diffuse the error */ + thisrow[col + 1] += error * 7; + nextrow[col - 1] += error * 3; + nextrow[col] += error * 5; + nextrow[col + 1] = error; + + xValue += deltaX; + yValue += deltaY; + } + + /* Add in error values that fell off either end */ + nextrow[0] += nextrow[-1]; + nextrow[newWidth - 2] += thisrow[newWidth]; + nextrow[newWidth - 1] += nextrow[newWidth]; + nextrow[newWidth] = 0; + + temp = nextrow; + nextrow = thisrow; + thisrow = temp; + nextrow[-1] = nextrow[0] = 0; + } + else + { + for (col = 0; col < newWidth; col++) + { + register int x = xValue >> 16, y = yValue >> 16; + + if (x >= 0 && x < width && y >= 0 && y < height) + { + /* Use point-sampling for rescaling. */ + + if (bitmap[(x >> 3) + y * bpr] & mask[x & 0x7]) + newBitmap[(col >> 3) + row * newBpr] |= mask[col & 0x7]; + } + + xValue += deltaX; + yValue += deltaY; + } + } + } + + + if (char_grayscale) + { + xfree(char_grayscale); + xfree(diffusion_workspace); + } +} + +static FontPtr +BitmapScaleBitmaps(FontPtr pf, /* scaled font */ + FontPtr opf, /* originating font */ + double widthMult, /* glyphs width scale factor */ + double heightMult, /* glyphs height scale factor */ + FontScalablePtr vals) +{ + register int i; + int nchars = 0; + char *glyphBytes; + BitmapFontPtr bitmapFont, + obitmapFont; + CharInfoPtr pci, + opci; + FontInfoPtr pfi; + int glyph; + unsigned bytestoalloc = 0; + int firstCol, lastCol, firstRow, lastRow; + + double xform[4], inv_xform[4]; + double xmult, ymult; + + bitmapFont = (BitmapFontPtr) pf->fontPrivate; + obitmapFont = (BitmapFontPtr) opf->fontPrivate; + + if (!compute_xform_matrix(vals, widthMult, heightMult, xform, + inv_xform, &xmult, &ymult)) + goto bail; + + pfi = &pf->info; + firstCol = pfi->firstCol; + lastCol = pfi->lastCol; + firstRow = pfi->firstRow; + lastRow = pfi->lastRow; + + nchars = (lastRow - firstRow + 1) * (lastCol - firstCol + 1); + glyph = pf->glyph; + for (i = 0; i < nchars; i++) + { + if ((pci = ACCESSENCODING(bitmapFont->encoding, i))) + bytestoalloc += BYTES_FOR_GLYPH(pci, glyph); + } + + /* Do we add the font malloc stuff for VALUE ADDED ? */ + /* Will need to remember to free in the Unload routine */ + + + bitmapFont->bitmaps = (char *) xalloc(bytestoalloc); + if (!bitmapFont->bitmaps) { + fprintf(stderr, "Error: Couldn't allocate bitmaps (%d)\n", bytestoalloc); + goto bail; + } + bzero(bitmapFont->bitmaps, bytestoalloc); + + glyphBytes = bitmapFont->bitmaps; + for (i = 0; i < nchars; i++) + { + if ((pci = ACCESSENCODING(bitmapFont->encoding, i)) && + (opci = ACCESSENCODING(obitmapFont->encoding, OLDINDEX(i)))) + { + pci->bits = glyphBytes; + ScaleBitmap (pf, opci, pci, inv_xform, + widthMult, heightMult); + glyphBytes += BYTES_FOR_GLYPH(pci, glyph); + } + } + return pf; + +bail: + if (pf) + xfree(pf); + if (bitmapFont) { + xfree(bitmapFont->metrics); + xfree(bitmapFont->ink_metrics); + xfree(bitmapFont->bitmaps); + if(bitmapFont->encoding) + for(i=0; i<NUM_SEGMENTS(nchars); i++) + xfree(bitmapFont->encoding[i]); + xfree(bitmapFont->encoding); + } + return NULL; +} + +static FontPtr +PrinterScaleBitmaps(FontPtr pf, /* scaled font */ + FontPtr opf, /* originating font */ + double widthMult, /* glyphs width scale factor */ + double heightMult, /* glyphs height scale factor */ + FontScalablePtr vals) +{ + register int i; + int nchars = 0; + char *glyphBytes; + BitmapFontPtr bitmapFont, + obitmapFont; + CharInfoPtr pci; + FontInfoPtr pfi; + int glyph; + unsigned bytestoalloc = 0; + int firstCol, lastCol, firstRow, lastRow; + + double xform[4], inv_xform[4]; + double xmult, ymult; + + bitmapFont = (BitmapFontPtr) pf->fontPrivate; + obitmapFont = (BitmapFontPtr) opf->fontPrivate; + + if (!compute_xform_matrix(vals, widthMult, heightMult, xform, + inv_xform, &xmult, &ymult)) + goto bail; + + pfi = &pf->info; + firstCol = pfi->firstCol; + lastCol = pfi->lastCol; + firstRow = pfi->firstRow; + lastRow = pfi->lastRow; + + nchars = (lastRow - firstRow + 1) * (lastCol - firstCol + 1); + glyph = pf->glyph; + for (i = 0; i < nchars; i++) + { + if ((pci = ACCESSENCODING(bitmapFont->encoding, i))) + bytestoalloc = MAX(bytestoalloc,BYTES_FOR_GLYPH(pci, glyph)); + } + + /* Do we add the font malloc stuff for VALUE ADDED ? */ + /* Will need to remember to free in the Unload routine */ + + + bitmapFont->bitmaps = (char *) xalloc(bytestoalloc); + if (!bitmapFont->bitmaps) { + fprintf(stderr, "Error: Couldn't allocate bitmaps (%d)\n", bytestoalloc); + goto bail; + } + bzero(bitmapFont->bitmaps, bytestoalloc); + + glyphBytes = bitmapFont->bitmaps; + for (i = 0; i < nchars; i++) + { + if ((pci = ACCESSENCODING(bitmapFont->encoding, i)) && + (ACCESSENCODING(obitmapFont->encoding, OLDINDEX(i)))) + { + pci->bits = glyphBytes; + } + } + return pf; + +bail: + if (pf) + xfree(pf); + if (bitmapFont) { + xfree(bitmapFont->metrics); + xfree(bitmapFont->ink_metrics); + xfree(bitmapFont->bitmaps); + if(bitmapFont->encoding) + for(i=0; i<NUM_SEGMENTS(nchars); i++) + xfree(bitmapFont->encoding[i]); + xfree(bitmapFont->encoding); + } + return NULL; +} + +#ifdef NOTDEF +/* + * exported interfaces + */ + +FontFileLoadName(FontFileDirPtr *dirs, int ndirs, char *name, FontPtr *pfont, + fsBitmapFormat format, fsBitmapFormatMask fmask) +{ + FontFileNamePtr fname; + char full_name[1024]; + int ret = BadFontName; + int i; + + i = 0; + while (i < ndirs) { + if (fname = FontFileFindNameInDir(dirs[i], name)) { + if (!fname->alias) { + if (!fname->font) { + strcpy(full_name, dirs[i]->dir); + strcat(full_name, fname->file); + ret = FontFileLoad(pfont, full_name, format, fmask); + if (ret == Successful) { + fname->font = *pfont; + (*pfont)->fpePrivate = (pointer) fname; + } + return ret; + } + *pfont = fname->font; + return Successful; + } + name = fname->file; + i = 0; + } else + i++; + } + return BadFontName; +} +#endif + +/* ARGSUSED */ +int +BitmapOpenScalable (FontPathElementPtr fpe, + FontPtr *pFont, + int flags, + FontEntryPtr entry, + char *fileName, /* unused */ + FontScalablePtr vals, + fsBitmapFormat format, + fsBitmapFormatMask fmask, + FontPtr non_cachable_font) /* We don't do licensing */ +{ + FontScalableRec best; + FontPtr font = NullFont; + double dx, sdx, + dy, sdy, + savedX, savedY; + FontPropPtr props; + char *isStringProp; + int propCount; + int status; + long sWidth; + + FontEntryPtr scaleFrom; + FontPathElementPtr scaleFPE; + FontPtr sourceFont; + char fontName[MAXFONTNAMELEN]; + + /* Can't deal with mix-endian fonts yet */ + +#ifdef NOTDEF /* XXX need better test */ + if ((format & BitmapFormatByteOrderMask) != + (format & BitmapFormatBitOrderMask)) + return NullFontFileName; +#endif + + /* Reject outrageously small font sizes to keep the math from + blowing up. */ + if (get_matrix_vertical_component(vals->pixel_matrix) < 1.0 || + get_matrix_horizontal_component(vals->pixel_matrix) < 1.0) + return BadFontName; + + scaleFrom = (*find_scale[BitmapGetRenderIndex(entry->u.bitmap.renderer)]) + (fpe, entry, vals, &best, &dx, &dy, &sdx, &sdy, &scaleFPE); + + if (!scaleFrom) + return BadFontName; + + status = FontFileOpenBitmap(scaleFPE, &sourceFont, LoadAll, scaleFrom, + format, fmask); + + if (status != Successful) + return BadFontName; + + if (!vals->width) + vals->width = best.width * dx; + + /* Compute the scaled font */ + + savedX = dx; + savedY = dy; + font = ScaleFont(sourceFont, dx, dy, sdx, sdy, vals, &dx, &dy, &sWidth); + if (font) + font = (*scale[ BitmapGetRenderIndex(entry->u.bitmap.renderer) ]) + (font, sourceFont, savedX, savedY, vals); + + if (!font) + { + if (!sourceFont->refcnt) + FontFileCloseFont((FontPathElementPtr) 0, sourceFont); + return AllocError; + } + + /* Prepare font properties for the new font */ + + strcpy (fontName, scaleFrom->name.name); + FontParseXLFDName (fontName, vals, FONT_XLFD_REPLACE_VALUE); + + propCount = ComputeScaledProperties(&sourceFont->info, fontName, vals, + dx, dy, sdx, sdy, sWidth, &props, + &isStringProp); + + if (!sourceFont->refcnt) + FontFileCloseFont((FontPathElementPtr) 0, sourceFont); + + if (propCount && (!props || !isStringProp)) + { + font->info.nprops = 0; + font->info.props = (FontPropPtr)0; + font->info.isStringProp = (char *)0; + bitmapUnloadScalable(font); + return AllocError; + } + + font->info.props = props; + font->info.nprops = propCount; + font->info.isStringProp = isStringProp; + + *pFont = font; + return Successful; +} + +int +BitmapGetInfoScalable (FontPathElementPtr fpe, + FontInfoPtr pFontInfo, + FontEntryPtr entry, + FontNamePtr fontName, + char *fileName, + FontScalablePtr vals) +{ + FontPtr pfont; + int flags = 0; + long format = 0; /* It doesn't matter what format for just info */ + long fmask = 0; + int ret; + + ret = BitmapOpenScalable(fpe, &pfont, flags, entry, fileName, vals, + format, fmask, NULL); + if (ret != Successful) + return ret; + *pFontInfo = pfont->info; + + pfont->info.nprops = 0; + pfont->info.props = NULL; + pfont->info.isStringProp = NULL; + + (*pfont->unload_font)(pfont); + return Successful; +} + +static void +bitmapUnloadScalable (FontPtr pFont) +{ + BitmapFontPtr bitmapFont; + FontInfoPtr pfi; + int i, nencoding; + + bitmapFont = (BitmapFontPtr) pFont->fontPrivate; + pfi = &pFont->info; + xfree (pfi->props); + xfree (pfi->isStringProp); + if(bitmapFont->encoding) { + nencoding = (pFont->info.lastCol - pFont->info.firstCol + 1) * + (pFont->info.lastRow - pFont->info.firstRow + 1); + for(i=0; i<NUM_SEGMENTS(nencoding); i++) + xfree(bitmapFont->encoding[i]); + } + xfree (bitmapFont->encoding); + xfree (bitmapFont->bitmaps); + xfree (bitmapFont->ink_metrics); + xfree (bitmapFont->metrics); + xfree (pFont->fontPrivate); + DestroyFontRec (pFont); +} |