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-rw-r--r--src/Speedo/set_trns.c1211
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diff --git a/src/Speedo/set_trns.c b/src/Speedo/set_trns.c
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--- a/src/Speedo/set_trns.c
+++ /dev/null
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-/* $Xorg: set_trns.c,v 1.3 2000/08/17 19:46:27 cpqbld Exp $ */
-
-/*
-
-Copyright 1989-1991, Bitstream Inc., Cambridge, MA.
-You are hereby granted permission under all Bitstream propriety rights to
-use, copy, modify, sublicense, sell, and redistribute the Bitstream Speedo
-software and the Bitstream Charter outline font for any purpose and without
-restrictions; provided, that this notice is left intact on all copies of such
-software or font and that Bitstream's trademark is acknowledged as shown below
-on all unmodified copies of such font.
-
-BITSTREAM CHARTER is a registered trademark of Bitstream Inc.
-
-
-BITSTREAM INC. DISCLAIMS ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
-WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-PARTICULAR PURPOSE. BITSTREAM SHALL NOT BE LIABLE FOR ANY DIRECT OR INDIRECT
-DAMAGES, INCLUDING BUT NOT LIMITED TO LOST PROFITS, LOST DATA, OR ANY OTHER
-INCIDENTAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF OR IN ANY WAY CONNECTED
-WITH THE SPEEDO SOFTWARE OR THE BITSTREAM CHARTER OUTLINE FONT.
-
-*/
-/* $XFree86: xc/lib/font/Speedo/set_trns.c,v 1.5tsi Exp $ */
-
-
-
-/*************************** S E T _ T R N S . C *****************************
- * *
- * This module is called from do_char.c to set up the intelligent *
- * transformation for one character (or sub-character of a composite *
- * character.
- * *
- ****************************************************************************/
-
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-#include "spdo_prv.h" /* General definitions for Speedo */
-
-#define DEBUG 0
-
-#if DEBUG
-#include <stdio.h>
-#define SHOW(X) printf("X = %d\n", X)
-#else
-#define SHOW(X)
-#endif
-/***** LOCAL MACROS *****/
-
-#define SQUEEZE_X_ORU(A,B,C) ((((fix31)A * (fix31)B) + C) >> 16)
-#define ABS(A) ((A < 0)? -A:A) /* absolute value */
-#define IMPORT_FACTOR \
- shift = 16;\
- while (*x_factor > (0x7fffffffL / (isw_scale >> (16 - shift))))\
- shift--;\
- *x_factor = (*x_factor * (isw_scale>>(16-shift))) >> shift;
-
-/***** GLOBAL VARIABLES *****/
-
-/***** GLOBAL FUNCTIONS *****/
-
-/***** EXTERNAL VARIABLES *****/
-
-/***** EXTERNAL FUNCTIONS *****/
-
-/***** STATIC VARIABLES *****/
-
-/***** STATIC FUNCTIONS *****/
-
-static void sp_constr_update(PROTO_DECL1);
-static ufix8 FONTFAR *sp_setup_pix_table(PROTO_DECL2 ufix8 FONTFAR *pointer,boolean short_form,fix15 no_X_ctrl_zones,fix15 no_Y_ctrl_zones);
-static ufix8 FONTFAR *sp_setup_int_table(PROTO_DECL2 ufix8 FONTFAR *pointer,fix15 no_X_int_zones,fix15 no_Y_int_zones);
-
-
-FUNCTION void init_tcb(/** GDECL **/ void)
-/*
- * Called by sp_make_char() and make_comp_char() to initialize the current
- * transformation control block to the top level transformation.
- */
-{
-sp_globals.tcb = sp_globals.tcb0;
-}
-
-FUNCTION void scale_tcb(
-GDECL
-tcb_t GLOBALFAR *ptcb, /* Transformation control block */
-fix15 x_pos, /* X position (outline res units) */
-fix15 y_pos, /* Y position (outline res units) */
-fix15 x_scale, /* X scale factor * ONE_SCALE */
-fix15 y_scale) /* Y scale factor * ONE_SCALE */
-/*
- * Called by make_comp_char() to apply position and scale for each of the
- * components of a compound character.
- */
-{
-fix15 xx_mult = ptcb->xxmult;
-fix15 xy_mult = ptcb->xymult;
-fix31 x_offset = ptcb->xoffset;
-fix15 yx_mult = ptcb->yxmult;
-fix15 yy_mult = ptcb->yymult;
-fix31 y_offset = ptcb->yoffset;
-
-ptcb->xxmult = TRANS(xx_mult, x_scale, (fix31)SCALE_RND, SCALE_SHIFT);
-ptcb->xymult = TRANS(xy_mult, y_scale, (fix31)SCALE_RND, SCALE_SHIFT);
-ptcb->xoffset = MULT16(xx_mult, x_pos) + MULT16(xy_mult, y_pos) + x_offset;
-ptcb->yxmult = TRANS(yx_mult, x_scale, (fix31)SCALE_RND, SCALE_SHIFT);
-ptcb->yymult = TRANS(yy_mult, y_scale, (fix31)SCALE_RND, SCALE_SHIFT);
-ptcb->yoffset = MULT16(yx_mult, x_pos) + MULT16(yy_mult, y_pos) + y_offset;
-
-type_tcb(ptcb); /* Reclassify transformation types */
-}
-
-
-static FUNCTION ufix8 FONTFAR *read_oru_table(
-GDECL
-ufix8 FONTFAR *pointer) /* Pointer to first byte in controlled coord table */
-/*
- * Called by plaid_tcb() to read the controlled coordinate table from the
- * character data in the font.
- * Updates the pointer to the byte following the controlled coordinate
- * data.
- */
-{
-fix15 i, j, k, n;
-boolean zero_not_in;
-boolean zero_added;
-fix15 oru;
-
-fix15 pos;
-
-i = 0;
-n = sp_globals.no_X_orus;
-pos = sp_globals.tcb.xpos;
-for (j = 0; ; j++)
- {
- zero_not_in = TRUE;
- zero_added = FALSE;
- for (k = 0; k < n; k++)
- {
- oru = NEXT_WORD(pointer);
- if (zero_not_in && (oru >= 0)) /* First positive oru value? */
- {
- sp_plaid.pix[i] = pos; /* Insert position in pix array */
- if (oru != 0) /* Zero oru value omitted? */
- {
- sp_plaid.orus[i++] = 0; /* Insert zero value in oru array */
- zero_added = TRUE; /* Remember to increment size of array */
- }
- zero_not_in = FALSE; /* Inhibit further testing for zero ins */
- }
- sp_plaid.orus[i++] = oru; /* Add specified oru value to array */
- }
- if (zero_not_in) /* All specified oru values negative? */
- {
- sp_plaid.pix[i] = pos; /* Insert position in pix array */
- sp_plaid.orus[i++] = 0; /* Add zero oru value */
- zero_added = TRUE; /* Remember to increment size of array */
- }
- if (j) /* Both X and Y orus read? */
- break;
- if (zero_added)
- sp_globals.no_X_orus++; /* Increment X array size */
- n = sp_globals.no_Y_orus; /* Prepare to read Y oru values */
- pos = sp_globals.tcb.ypos;
- }
-if (zero_added) /* Zero Y oru value added to array? */
- sp_globals.no_Y_orus++; /* Increment Y array size */
-
-#if DEBUG
-printf("\nX ORUS\n");
-n = sp_globals.no_X_orus;
-for (i = 0; i < n; i++)
- {
- printf("%2d %4d\n", i, sp_plaid.orus[i]);
- }
-printf("\nY ORUS\n");
-n = sp_globals.no_Y_orus;
-for (i = 0; i < n; i++)
- {
- printf("%2d %4d\n", i, sp_plaid.orus[i + sp_globals.no_X_orus]);
- }
-#endif
-
-return pointer; /* Update pointer */
-}
-
-FUNCTION ufix8 FONTFAR *plaid_tcb(
-GDECL
-ufix8 FONTFAR *pointer, /* Pointer to next byte in char data */
-ufix8 format) /* Character format byte */
-/*
- * Called by make_simp_char() and make_comp_char() to set up the controlled
- * coordinate table and process all intelligent scaling rules embedded
- * in the character data.
- * Updates pointer to first byte after plaid data.
- * This is used only if intelligent scaling is enabled in the
- * configuration definitions.
- */
-{
-fix15 no_X_ctrl_zones;
-fix15 no_Y_ctrl_zones;
-fix15 no_X_int_zones;
-fix15 no_Y_int_zones;
-
-#if INCL_PLAID_OUT /* Plaid data monitoring included? */
-begin_plaid_data();
-#endif
-
-sp_constr_update(); /* Update constraint table if required */
-
-sp_globals.no_X_orus = (format & BIT2)?
- (fix15)NEXT_BYTE(pointer):
- 0;
-sp_globals.no_Y_orus = (format & BIT3)?
- (fix15)NEXT_BYTE(pointer):
- 0;
-pointer = read_oru_table(pointer); /* Updates no_X/Y/orus to include zero values */
-sp_globals.Y_edge_org = sp_globals.no_X_orus;
-if (sp_globals.no_X_orus > 1) /* 2 or more controlled X coordinates? */
- sp_globals.tcb.xmode = sp_globals.tcb.xtype; /* Enable intelligent scaling in X */
-
-if (sp_globals.no_Y_orus > 1) /* 2 or more controlled Y coordinates? */
- sp_globals.tcb.ymode = sp_globals.tcb.ytype; /* Enable intelligent scaling in Y */
-
-no_X_ctrl_zones = sp_globals.no_X_orus - 1;
-no_Y_ctrl_zones = sp_globals.no_Y_orus - 1;
-pointer = sp_setup_pix_table(pointer, (boolean)(format & BIT4),
- no_X_ctrl_zones, no_Y_ctrl_zones);
-
-no_X_int_zones = (format & BIT6)?
- (fix15)NEXT_BYTE(pointer):
- 0;
-no_Y_int_zones = (format & BIT7)?
- (fix15)NEXT_BYTE(pointer):
- 0;
-sp_globals.Y_int_org = no_X_int_zones;
-pointer = sp_setup_int_table(pointer, no_X_int_zones, no_Y_int_zones);
-
-#if INCL_PLAID_OUT /* Plaid data monitoring included? */
-end_plaid_data();
-#endif
-
-return pointer;
-}
-
-FUNCTION static void sp_constr_update(/** GDECL **/ void)
-/*
- * Called by plaid_tcb() to update the constraint table for the current
- * transformation.
- * This is always carried out whenever a character is generated following
- * a change of font or scale factor or after initialization.
- */
-{
-fix31 ppo;
-fix15 xppo;
-fix15 yppo;
-ufix8 FONTFAR *pointer;
-fix15 no_X_constr;
-fix15 no_Y_constr;
-fix15 i, j, k, l, n;
-fix15 ppm;
-ufix8 format;
-ufix8 format1;
-fix15 limit;
-ufix16 constr_org;
-fix15 constr_nr;
-fix15 size;
-fix31 off;
-fix15 min;
-fix15 orus;
-fix15 pix;
-ufix16 tmpufix16; /* in extended mode, macro uses secnd term */
-
-if (sp_globals.constr.data_valid && /* Constr table already done and ... */
- (sp_globals.tcb.xppo == sp_globals.constr.xppo) && /* ... X pix per oru unchanged and ... */
- (sp_globals.tcb.yppo == sp_globals.constr.yppo)) /* ... Y pix per oru unchanged? */
- {
- return; /* No need to update constraint table */
- }
-
-sp_globals.constr.xppo = xppo = sp_globals.tcb.xppo; /* Update X pixels per oru indicator */
-sp_globals.constr.yppo = yppo = sp_globals.tcb.yppo; /* Update Y pixels per oru indicator */
-sp_globals.constr.data_valid = TRUE; /* Mark constraint table valid */
-
-pointer = sp_globals.constr.org; /* Point to first byte of constraint data */
-no_X_constr = NEXT_BYTES(pointer, tmpufix16); /* Read nmbr of X constraints */
-no_Y_constr = NEXT_BYTES(pointer, tmpufix16); /* Read nmbr of Y constraints */
-
-i = 0;
-constr_org = 0;
-n = no_X_constr;
-ppo = xppo;
-for (j = 0; ; j++)
- {
- sp_globals.c_act[i] = FALSE; /* Flag constraint 0 not active */
- sp_globals.c_pix[i++] = 0; /* Constraint 0 implies no minimum */
- sp_globals.c_act[i] = FALSE; /* Flag constraint 1 not active */
- sp_globals.c_pix[i++] = sp_globals.onepix; /* Constraint 1 implies min 1 pixel*/
- ppm = (ppo * (fix31)sp_globals.orus_per_em) >> sp_globals.multshift;
- for (k = 0; k < n; k++)
- {
- format = NEXT_BYTE(pointer); /* Read format byte */
- limit = (fix15)NEXT_BYTE(pointer); /* Read limit field */
- sp_globals.c_act[i] =
- ((ppm < limit) || (limit == 255)) &&
- sp_globals.constr.active;
- if (sp_globals.c_act[i]) /* Constraint active? */
- {
- if ((format & BIT1) && /* Constraint specified and ... */
- (constr_nr = constr_org +
- ((format & BIT0)? /* Read unsigned constraint value */
- NEXT_WORD(pointer):
- (fix15)NEXT_BYTE(pointer)),
- sp_globals.c_act[constr_nr])) /* ... and specified constraint active? */
- {
- pix = sp_globals.c_pix[constr_nr]; /* Use constrained pixel value */
- format1 = format;
- for (l = 2; l > 0; l--) /* Skip 2 arguments */
- {
- format1 >>= 2;
- if ((size = format1 & 0x03))
- pointer += size - 1;
- }
- }
- else /* Constraint absent or inactive? */
- {
- orus = (format & BIT2)? /* Read unsigned oru value */
- NEXT_WORD(pointer):
- (fix15)NEXT_BYTE(pointer);
-
- if (format & BIT5) /* Specified offset value? */
- {
- off = (fix31)((format & BIT4)? /* Read offset value */
- NEXT_WORD(pointer):
- (fix7)NEXT_BYTE(pointer));
- off = (off << (sp_globals.multshift - 6)) + sp_globals.multrnd;
- }
- else /* Unspecified (zero) offset value? */
- {
- off = sp_globals.multrnd;
- }
-
- pix = (fix15)(((fix31)orus * ppo + off) / (1 << sp_globals.mpshift)) & sp_globals.pixfix;
- }
- }
- else /* Constraint inactive? */
- {
- format1 = format;
- for (l = 3; l > 0; l--) /* Skip over 3 arguments */
- {
- if ((size = format1 & 0x03))
- pointer += size - 1;
- format1 >>= 2;
- }
- pix = 0;
- }
-
- if (format & 0xc0) /* Specified minimum value? */
- {
- min = (format & BIT7)? /* Read unsigned minimum value */
- (fix15)NEXT_BYTE(pointer) << sp_globals.pixshift:
- sp_globals.onepix;
- }
- else /* Unspecified (zero) minimum value? */
- {
- min = 0;
- }
-
- sp_globals.c_pix[i] = (pix < min)? min: pix;
- i++;
- }
- if (j) break; /* Finished if second time around loop */
- constr_org = sp_globals.Y_constr_org = i;
- n = no_Y_constr;
- ppo = yppo;
- }
-
-#if DEBUG
-printf("\nCONSTRAINT TABLE\n");
-n = no_X_constr + 2;
-for (i = 0; i < n; i++)
- {
- printf("%3d ", i);
- if (sp_globals.c_act[i])
- {
- printf("T ");
- }
- else
- {
- printf("F ");
- }
- printf("%5.1f\n", ((real)sp_globals.c_pix[i] / (real)sp_globals.onepix));
- }
-printf("--------------\n");
-n = no_Y_constr + 2;
-for (i = 0; i < n; i++)
- {
- j = i + sp_globals.Y_constr_org;
- printf("%3d ", i);
- if (sp_globals.c_act[j])
- {
- printf("T ");
- }
- else
- {
- printf("F ");
- }
- printf("%5.1f\n", ((real)sp_globals.c_pix[j] / (real)sp_globals.onepix));
- }
-#endif
-
-}
-
-#if INCL_SQUEEZING || INCL_ISW
-FUNCTION static void calculate_x_pix(
-GDECL
-ufix8 start_edge, ufix8 end_edge,
-ufix16 constr_nr,
-fix31 x_scale,
-fix31 x_offset,
-fix31 ppo,
-fix15 setwidth_pix)
-/*
- * Called by sp_setup_pix_table() when X squeezing is necessary
- * to insert the correct edge in the global pix array
- */
-{
-fix15 zone_pix;
-fix15 start_oru, end_oru;
-
-/* compute scaled oru coordinates */
-start_oru= (fix15)(SQUEEZE_X_ORU(sp_plaid.orus[start_edge], x_scale, x_offset));
-end_oru = (fix15)(SQUEEZE_X_ORU(sp_plaid.orus[end_edge], x_scale, x_offset));
-
-if (!sp_globals.c_act[constr_nr]) /* constraint inactive */
- {
- /* calculate zone width */
- zone_pix = (fix15)(((((fix31)end_oru - (fix31)start_oru) * ppo) /
- (1<<sp_globals.mpshift)) + sp_globals.pixrnd) & sp_globals.pixfix;
- /* check for overflow */
- if (((end_oru-start_oru) > 0) && (zone_pix < 0))
- zone_pix = 0x7ffff;
- /* check for minimum */
- if ((ABS(zone_pix)) >= sp_globals.c_pix[constr_nr])
- goto Lx;
- }
-/* use the zone size from the constr table - scale it */
-zone_pix = (fix15)(((SQUEEZE_MULT(x_scale,sp_globals.c_pix[constr_nr]))
- + sp_globals.pixrnd) & sp_globals.pixfix);
-
-/* look for overflow */
-if ((sp_globals.c_pix[constr_nr] > 0) && (zone_pix < 0))
- zone_pix = 0x7fff;
-
-if (start_edge > end_edge)
- {
- zone_pix = -zone_pix;
- }
-Lx:
-/* assign pixel value to global pix array */
-sp_plaid.pix[end_edge]=sp_plaid.pix[start_edge] + zone_pix;
-
-/* check for overflow */
-if (((sp_plaid.pix[start_edge] >0) && (zone_pix >0)) &&
- (sp_plaid.pix[end_edge] < 0))
- sp_plaid.pix[end_edge] = 0x7fff; /* set it to the max */
-
-/* be sure to be in the setwidth !*/
-#if INCL_ISW
-if (!sp_globals.import_setwidth_act) /* only check left edge if not isw only */
-#endif
-if ((sp_globals.pspecs->flags & SQUEEZE_LEFT) && (sp_plaid.pix[end_edge] < 0))
- sp_plaid.pix[end_edge] = 0;
-if ((sp_globals.pspecs->flags & SQUEEZE_RIGHT) &&
- (sp_plaid.pix[end_edge] > setwidth_pix))
- sp_plaid.pix[end_edge] = setwidth_pix;
-
-}
-#endif
-
-#if INCL_SQUEEZING
-FUNCTION static void calculate_y_pix(
-GDECL
-ufix8 start_edge, ufix8 end_edge,
-ufix16 constr_nr,
-fix31 top_scale, fix31 bottom_scale,
-fix31 ppo,
-fix15 em_top_pix, fix15 em_bot_pix)
-
-/*
- * Called by sp_setup_pix_table() when Y squeezing is necessary
- * to insert the correct edge in the global pix array
- */
-{
-fix15 zone_pix;
-fix15 start_oru, end_oru;
-fix31 zone_width, above_base, below_base;
-
-/* check whether edge is above or below the baseline */
-/* and apply appropriate scale factor to get scaled oru coordinates */
-if (sp_plaid.orus[start_edge] < 0)
- start_oru =(fix15)(SQUEEZE_MULT(sp_plaid.orus[start_edge], bottom_scale));
-else
- start_oru =(fix15)(SQUEEZE_MULT(sp_plaid.orus[start_edge], top_scale));
-
-if (sp_plaid.orus[end_edge] < 0)
- end_oru =(fix15)(SQUEEZE_MULT(sp_plaid.orus[end_edge], bottom_scale));
-else
- end_oru =(fix15)(SQUEEZE_MULT(sp_plaid.orus[end_edge], top_scale));
-
-if (!sp_globals.c_act[constr_nr]) /* Constraint inactive? */
- {
- /* calculate zone width */
- zone_pix = (fix15)(((((fix31)end_oru - (fix31)start_oru) * ppo)
- >> sp_globals.mpshift)+ sp_globals.pixrnd) & sp_globals.pixfix;
- /* check minimum */
- if ((ABS(zone_pix)) >= sp_globals.c_pix[constr_nr])
- goto Ly;
- }
-
-/* Use zone size from constr table */
-if ((end_oru >= 0) && (start_oru >=0))
- /* all above baseline */
- zone_pix = (fix15)(SQUEEZE_MULT(top_scale, sp_globals.c_pix[constr_nr]));
-else if ((end_oru <= 0) && (start_oru <=0))
- /* all below baseline */
- zone_pix = (fix15)(SQUEEZE_MULT(bottom_scale, sp_globals.c_pix[constr_nr]));
-else
- {
- /* mixture */
- if (start_oru > 0)
- {
- zone_width = start_oru - end_oru;
- /* get % above baseline in 16.16 fixed point */
- above_base = (((fix31)start_oru) << 16) /
- ((fix31)zone_width) ;
- /* get % below baseline in 16.16 fixed point */
- below_base = (((fix31)-end_oru) << 16) /
- ((fix31)zone_width) ;
- }
- else
- {
- zone_width = end_oru - start_oru;
- /* get % above baseline in 16.16 fixed point */
- above_base = (((fix31)-start_oru) << 16) /
- ((fix31)zone_width) ;
- /* get % below baseline in 16.16 fixed point */
- below_base = (((fix31)end_oru) << 16) /
- ((fix31)zone_width) ;
- }
- /* % above baseline * total zone * top_scale + */
- /* % below baseline * total zone * bottom_scale */
- zone_pix = ((((above_base * (fix31)sp_globals.c_pix[constr_nr]) >> 16) *
- top_scale) +
- (((below_base * (fix31)sp_globals.c_pix[constr_nr]) >> 16) *
- bottom_scale)) >> 16;
- }
-
-/* make this zone pix fall on a pixel boundary */
-zone_pix = (zone_pix + sp_globals.pixrnd) & sp_globals.pixfix;
-
-/* if minimum is in effect make the zone one pixel */
-if ((sp_globals.c_pix[constr_nr] != 0) && (zone_pix < sp_globals.onepix))
- zone_pix = sp_globals.onepix;
-
-if (start_edge > end_edge)
- {
- zone_pix = -zone_pix; /* Use negatve zone size */
- }
-Ly:
-/* assign global pix value */
-sp_plaid.pix[end_edge] = sp_plaid.pix[start_edge] + zone_pix; /* Insert end pixels */
-
-/* make sure it is in the EM !*/
-if ((sp_globals.pspecs->flags & SQUEEZE_TOP) &&
- (sp_plaid.pix[end_edge] > em_top_pix))
- sp_plaid.pix[end_edge] = em_top_pix;
-if ((sp_globals.pspecs->flags & SQUEEZE_BOTTOM) &&
- (sp_plaid.pix[end_edge] < em_bot_pix))
- sp_plaid.pix[end_edge] = em_bot_pix;
-}
-
-FUNCTION boolean calculate_x_scale(
-GDECL
-fix31 *x_factor,
-fix31 *x_offset,
-fix15 no_X_ctrl_zones) /* Number of X control zones */
-/*
- * Called by sp_setup_pix_table() when squeezing is included
- * to determine whether X scaling is necessary. If it is, the
- * scale factor and offset are computed. This function returns
- * a boolean value TRUE = X squeezind is necessary, FALSE = no
- * X squeezing is necessary.
- */
-{
-boolean squeeze_left, squeeze_right;
-boolean out_on_right, out_on_left;
-fix15 bbox_width,set_width;
-fix15 bbox_xmin, bbox_xmax;
-fix15 x_offset_pix;
-fix15 i;
-#if INCL_ISW
-fix31 isw_scale;
-fix15 shift;
-#endif
-
-
-/* set up some flags and common calculations */
-squeeze_left = (sp_globals.pspecs->flags & SQUEEZE_LEFT)? TRUE:FALSE;
-squeeze_right = (sp_globals.pspecs->flags & SQUEEZE_RIGHT)? TRUE:FALSE;
-bbox_xmin = sp_globals.bbox_xmin_orus;
-bbox_xmax = sp_globals.bbox_xmax_orus;
-set_width = sp_globals.setwidth_orus;
-
-if (bbox_xmax > set_width)
- out_on_right = TRUE;
-else
- out_on_right = FALSE;
-if (bbox_xmin < 0)
- out_on_left = TRUE;
-else
- out_on_left = FALSE;
-bbox_width =bbox_xmax - bbox_xmin;
-
-/*
- * don't need X squeezing if:
- * - X squeezing not enabled
- * - bbox doesn't violate on left or right
- * - left squeezing only is enabled and char isn't out on left
- * - right squeezing only is enabled and char isn't out on right
- */
-
-if ((!squeeze_left && !squeeze_right) ||
- (!out_on_right && !out_on_left) ||
- (squeeze_left && !squeeze_right && !out_on_left) ||
- (squeeze_right && !squeeze_left && !out_on_right))
- return FALSE;
-
-#if INCL_ISW
-if (sp_globals.import_setwidth_act)
- {
- /* if both isw and squeezing is going on - let the imported */
- /* setwidth factor be factored in with the squeeze */
- isw_scale = compute_isw_scale();
- /*sp_globals.setwidth_orus = sp_globals.imported_width;*/
- }
-else
- isw_scale = 0x10000L; /* 1 in 16.16 notation */
-#endif
-
-/* squeezing on left and right ? */
-if (squeeze_left && squeeze_right)
- {
- /* calculate scale factor */
- if (bbox_width < set_width)
- *x_factor = 0x10000L; /* 1 in 16.16 notation */
- else
- *x_factor = ((fix31)set_width<<16)/(fix31)bbox_width;
-#if INCL_ISW
- IMPORT_FACTOR
-#endif
- /* calculate offset */
- if (out_on_left) /* fall out on left ? */
- *x_offset = -(fix31)*x_factor * (fix31)bbox_xmin;
- /* fall out on right and I am shifting only ? */
- else if (out_on_right && (*x_factor == 0x10000L))
- *x_offset = -(fix31)*x_factor * (fix31)(bbox_xmax - set_width);
- else
- *x_offset = 0x0L; /* 0 in 16.16 notation */
- }
-/* squeezing on left only and violates left */
-else if (squeeze_left)
- {
- if (bbox_width < set_width) /* will it fit if I shift it ? */
- *x_factor = 0x10000L; /* 1 in 16.16 notation */
- else if (out_on_right)
- *x_factor = ((fix31)set_width<<16)/(fix31)bbox_width;
- else
- *x_factor = ((fix31)set_width<<16)/
- (fix31)(bbox_width - (bbox_xmax-set_width));
-#if INCL_ISW
- IMPORT_FACTOR
-#endif
- *x_offset = (fix31)-*x_factor * (fix31)bbox_xmin;
- }
-
-/* I must be squeezing on right, and violates right */
-else
- {
- if (bbox_width < set_width) /* will it fit if I shift it ? */
- { /* just shift it left - it will fit in the bbox */
- *x_factor = 0x10000L; /* 1 in 16.16 notation */
-#if INCL_ISW
- IMPORT_FACTOR
-#endif
- *x_offset = (fix31)-*x_factor * (fix31)bbox_xmin;
- }
- else if (out_on_left)
- {
- *x_factor = ((fix31)set_width<<16)/(fix31)bbox_width;
-#if INCL_ISW
- IMPORT_FACTOR
-#endif
- *x_offset = 0x0L; /* 0 in 16.16 notation */
- }
- else
- {
- *x_factor = ((fix31)set_width<<16)/(fix31)bbox_xmax;
-#if INCL_ISW
- IMPORT_FACTOR
-#endif
- *x_offset = 0x0L; /* 0 in 16.16 notation */
- }
- }
-
-x_offset_pix = (fix15)(((*x_offset >> 16) * sp_globals.tcb0.xppo)
- / (1<<sp_globals.mpshift));
-
-if ((x_offset_pix >0) && (x_offset_pix < sp_globals.onepix))
- x_offset_pix = sp_globals.onepix;
-
-/* look for the first non-negative oru value, scale and add the offset */
-/* to the corresponding pixel value - note that the pixel value */
-/* is set in read_oru_table. */
-
-/* look at all the X edges */
-for (i=0; i < (no_X_ctrl_zones+1); i++)
- if (sp_plaid.orus[i] >= 0)
- {
- sp_plaid.pix[i] = (SQUEEZE_MULT(sp_plaid.pix[i], *x_factor)
- +sp_globals.pixrnd + x_offset_pix) & sp_globals.pixfix;
- break;
- }
-
-return TRUE;
-}
-
-FUNCTION boolean calculate_y_scale(
-GDECL
-fix31 *top_scale, fix31 *bottom_scale,
-fix15 first_Y_zone,
-fix15 no_Y_ctrl_zones)
-/*
- * Called by sp_setup_pix_table() when squeezing is included
- * to determine whether Y scaling is necessary. If it is,
- * two scale factors are computed, one for above the baseline,
- * and one for below the basline.
- * This function returns a boolean value TRUE = Y squeezind is necessary,
- * FALSE = no Y squeezing is necessary.
- */
-{
-boolean squeeze_top, squeeze_bottom;
-boolean out_on_top, out_on_bottom;
-fix15 bbox_top, bbox_bottom;
-fix15 bbox_height;
-fix15 i;
-
-/* set up some flags and common calculations */
-squeeze_top = (sp_globals.pspecs->flags & SQUEEZE_TOP)? TRUE:FALSE;
-squeeze_bottom = (sp_globals.pspecs->flags & SQUEEZE_BOTTOM)? TRUE:FALSE;
-bbox_top = sp_globals.bbox_ymax_orus;
-bbox_bottom = sp_globals.bbox_ymin_orus;
-bbox_height = bbox_top - bbox_bottom;
-
-if (bbox_top > EM_TOP)
- out_on_top = TRUE;
-else
- out_on_top = FALSE;
-
-if (bbox_bottom < EM_BOT)
- out_on_bottom = TRUE;
-else
- out_on_bottom = FALSE;
-
-/*
- * don't need Y squeezing if:
- * - Y squeezing not enabled
- * - bbox doesn't violate on top or bottom
- * - top squeezing only is enabled and char isn't out on top
- * - bottom squeezing only is enabled and char isn't out on bottom
- */
-if ((!squeeze_top && !squeeze_bottom) ||
- (!out_on_top && !out_on_bottom) ||
- (squeeze_top && !squeeze_bottom && !out_on_top) ||
- (squeeze_bottom && !squeeze_top && !out_on_bottom))
- return FALSE;
-
-if (squeeze_top && (bbox_top > EM_TOP))
- *top_scale = ((fix31)EM_TOP << 16)/(fix31)(bbox_top);
-else
- *top_scale = 0x10000L; /* 1 in 16.16 fixed point */
-
-if (squeeze_bottom && (bbox_bottom < EM_BOT))
- *bottom_scale = ((fix31)-(EM_BOT) << 16)/(fix31)-bbox_bottom;
-else
- *bottom_scale = 0x10000L;
-
-if (sp_globals.squeezing_compound)
- {
- for (i=first_Y_zone; i < (first_Y_zone + no_Y_ctrl_zones + 1); i++)
- {
- if (sp_plaid.orus[i] >= 0)
- sp_plaid.pix[i] = (SQUEEZE_MULT(sp_plaid.pix[i], *top_scale)
- +sp_globals.pixrnd) & sp_globals.pixfix;
- else
- sp_plaid.pix[i] = (SQUEEZE_MULT(sp_plaid.pix[i], *bottom_scale)
- +sp_globals.pixrnd) & sp_globals.pixfix;
- }
- }
-return TRUE;
-}
-#endif
-
-FUNCTION static ufix8 FONTFAR *sp_setup_pix_table(
-GDECL
-ufix8 FONTFAR *pointer, /* Pointer to first byte in control zone table */
-boolean short_form, /* TRUE if 1 byte from/to specification */
-fix15 no_X_ctrl_zones, /* Number of X control zones */
-fix15 no_Y_ctrl_zones) /* Number of Y control zones */
-/*
- * Called by plaid_tcb() to read the control zone table from the
- * character data in the font.
- * Sets up a table of pixel values for all controlled coordinates.
- * Updates the pointer to the byte following the control zone
- * data.
- */
-{
-fix15 i, j, n;
-fix31 ppo;
-#if INCL_SQUEEZING || INCL_ISW
-fix31 xppo0; /* top level pixels per oru */
-fix31 yppo0; /* top level pixels per oru */
-#endif
-ufix8 edge_org;
-ufix8 edge;
-ufix8 start_edge;
-ufix8 end_edge;
-ufix16 constr_org;
-fix15 constr_nr;
-fix15 zone_pix;
-fix31 whole_zone; /* non-transformed value of the first X zone */
-ufix16 tmpufix16; /* in extended mode, macro uses secnd term */
-#if INCL_SQUEEZING
-fix31 x_scale;
-fix31 y_top_scale, y_bottom_scale;
-fix31 x_offset;
-boolean squeezed_y;
-fix15 setwidth_pix, em_top_pix, em_bot_pix;
-#endif
-
-#if INCL_ISW
-boolean imported_width;
-fix31 isw_scale;
-fix15 isw_setwidth_pix;
-#endif
-
-#if INCL_ISW || INCL_SQUEEZING
-boolean squeezed_x;
-#endif
-
-#if INCL_PLAID_OUT /* Plaid data monitoring included? */
-begin_ctrl_zones(no_X_ctrl_zones, no_Y_ctrl_zones);
-#endif
-
-
-edge_org = 0;
-constr_org = 0;
-sp_globals.rnd_xmin = 0; /* initialize the error for chars with no zone */
-n = no_X_ctrl_zones;
-ppo = sp_globals.tcb.xppo;
-#if INCL_SQUEEZING || INCL_ISW
-xppo0 = sp_globals.tcb0.xppo;
-yppo0 = sp_globals.tcb0.yppo;
-squeezed_x = FALSE;
-#endif
-
-#if INCL_SQUEEZING
-squeezed_x = calculate_x_scale (&x_scale, &x_offset, no_X_ctrl_zones);
-squeezed_y = calculate_y_scale(&y_top_scale,&y_bottom_scale,(n+1),
- no_Y_ctrl_zones);
-#if INCL_ISW
-if (sp_globals.import_setwidth_act == TRUE)
-setwidth_pix = ((fix15)(((fix31)sp_globals.imported_width * xppo0) >>
- sp_globals.mpshift) + sp_globals.pixrnd) & sp_globals.pixfix;
-
-else
-#endif
-setwidth_pix = ((fix15)(((fix31)sp_globals.setwidth_orus * xppo0) >>
- sp_globals.mpshift) + sp_globals.pixrnd) & sp_globals.pixfix;
-/* check for overflow */
-if (setwidth_pix < 0)
- setwidth_pix = 0x7fff; /* set to maximum */
-em_bot_pix = ((fix15)(((fix31)EM_BOT * yppo0) >>
- sp_globals.mpshift) + sp_globals.pixrnd) & sp_globals.pixfix;
-em_top_pix = ((fix15)(((fix31)EM_TOP * yppo0) >>
- sp_globals.mpshift) + sp_globals.pixrnd) & sp_globals.pixfix;
-#endif
-
-#if INCL_ISW
-/* convert to pixels */
-isw_setwidth_pix = ((fix15)(((fix31)sp_globals.imported_width * xppo0) >>
- sp_globals.mpshift) + sp_globals.pixrnd) & sp_globals.pixfix;
-/* check for overflow */
-if (isw_setwidth_pix < 0)
- isw_setwidth_pix = 0x7fff; /* set to maximum */
-if (!squeezed_x && ((imported_width = sp_globals.import_setwidth_act) == TRUE))
- {
- isw_scale = compute_isw_scale();
-
- /* look for the first non-negative oru value, scale and add the offset */
- /* to the corresponding pixel value - note that the pixel value */
- /* is set in read_oru_table. */
-
- /* look at all the X edges */
- for (i=0; i < (no_X_ctrl_zones+1); i++)
- if (sp_plaid.orus[i] >= 0)
- {
- sp_plaid.pix[i] = (SQUEEZE_MULT(sp_plaid.pix[i], isw_scale)
- +sp_globals.pixrnd) & sp_globals.pixfix;
- break;
- }
-
- }
-#endif
-
-for (i = 0; ; i++) /* For X and Y control zones... */
- {
- for (j = 0; j < n; j++) /* For each zone in X or Y... */
- {
- if (short_form) /* 1 byte from/to specification? */
- {
- edge = NEXT_BYTE(pointer); /* Read packed from/to spec */
- start_edge = edge_org + (edge & 0x0f); /* Extract start edge */
- end_edge = edge_org + (edge >> 4); /* Extract end edge */
- }
- else /* 2 byte from/to specification? */
- {
- start_edge = edge_org + NEXT_BYTE(pointer); /* Read start edge */
- end_edge = edge_org + NEXT_BYTE(pointer); /* read end edge */
- }
- constr_nr = constr_org +
- NEXT_BYTES(pointer, tmpufix16); /* Read constraint number */
-#if INCL_SQUEEZING
- if (i == 0 && squeezed_x)
- calculate_x_pix(start_edge, end_edge, constr_nr,
- x_scale, x_offset, ppo, setwidth_pix);
- else if (i == 1 && squeezed_y)
- calculate_y_pix(start_edge, end_edge,constr_nr,
- y_top_scale, y_bottom_scale, ppo, em_top_pix, em_bot_pix);
- else
- {
-#endif
-#if INCL_ISW
- if (i==0 && imported_width)
- calculate_x_pix(start_edge, end_edge, constr_nr,
- isw_scale, 0, ppo, isw_setwidth_pix);
- else
- {
-#endif
- if (!sp_globals.c_act[constr_nr]) /* Constraint inactive? */
- {
- zone_pix = ((fix15)((((fix31)sp_plaid.orus[end_edge] -
- (fix31)sp_plaid.orus[start_edge]) * ppo) /
- (1<<sp_globals.mpshift)) + sp_globals.pixrnd) &
- sp_globals.pixfix;
- if ((ABS(zone_pix)) >= sp_globals.c_pix[constr_nr])
- goto L1;
- }
- zone_pix = sp_globals.c_pix[constr_nr]; /* Use zone size from constr table */
- if (start_edge > end_edge) /* sp_plaid.orus[start_edge] > sp_plaid.orus[end_edge]? */
- {
- zone_pix = -zone_pix; /* Use negatve zone size */
- }
- L1:
- /* inter-character spacing fix */
- if ((j == 0) && (i == 0)) /* if this is the 1st X zone, save rounding error */
- { /* get the non-xformed - xformed zone, in right direction */
- whole_zone = (((fix31)sp_plaid.orus[end_edge] -
- (fix31)sp_plaid.orus[start_edge]) *
- ppo) / (1<<sp_globals.mpshift);
- sp_globals.rnd_xmin = whole_zone - zone_pix;
- }
- sp_plaid.pix[end_edge] = sp_plaid.pix[start_edge] + zone_pix; /* Insert end pixels */
-#if INCL_SQUEEZING
- if (i == 0) /* in the x direction */
- { /* brute force squeeze */
- if ((sp_globals.pspecs->flags & SQUEEZE_LEFT) &&
- (sp_plaid.pix[end_edge] < 0))
- sp_plaid.pix[end_edge] = 0;
- if ((sp_globals.pspecs->flags & SQUEEZE_RIGHT) &&
- (sp_plaid.pix[end_edge] > setwidth_pix))
- sp_plaid.pix[end_edge] = setwidth_pix;
- }
- if (i == 1) /* in the y direction */
- { /* brute force squeeze */
- if ((sp_globals.pspecs->flags & SQUEEZE_TOP) &&
- (sp_plaid.pix[end_edge] > em_top_pix))
- sp_plaid.pix[end_edge] = em_top_pix;
- if ((sp_globals.pspecs->flags & SQUEEZE_BOTTOM) &&
- (sp_plaid.pix[end_edge] < em_bot_pix))
- sp_plaid.pix[end_edge] = em_bot_pix;
- }
-#endif
-#if INCL_SQUEEZING
- }
-#endif
-#if INCL_ISW
- }
-#endif
-#if INCL_PLAID_OUT /* Plaid data monitoring included? */
- record_ctrl_zone(
- (fix31)sp_plaid.pix[start_edge] << (16 - sp_globals.pixshift),
- (fix31)sp_plaid.pix[end_edge] << (16 - sp_globals.pixshift),
- (fix15)(constr_nr - constr_org));
-#endif
- }
- if (i) /* Y pixels done? */
- break;
- edge_org = sp_globals.Y_edge_org; /* Prepare to process Y ctrl zones */
- constr_org = sp_globals.Y_constr_org;
- n = no_Y_ctrl_zones;
- ppo = sp_globals.tcb.yppo;
- }
-
-#if DEBUG
-printf("\nX PIX TABLE\n");
-n = no_X_ctrl_zones + 1;
-for (i = 0; i < n; i++)
- printf("%2d %6.1f\n", i, (real)sp_plaid.pix[i] / (real)sp_globals.onepix);
-printf("\nY PIX TABLE\n");
-n = no_Y_ctrl_zones + 1;
-for (i = 0; i < n; i++)
- {
- j = i + no_X_ctrl_zones + 1;
- printf("%2d %6.1f\n", i, (real)sp_plaid.pix[j] / (real)sp_globals.onepix);
- }
-#endif
-
-return pointer;
-}
-
-
-FUNCTION static ufix8 FONTFAR *sp_setup_int_table(
-GDECL
-ufix8 FONTFAR *pointer, /* Pointer to first byte in interpolation zone table */
-fix15 no_X_int_zones, /* Number of X interpolation zones */
-fix15 no_Y_int_zones) /* Number of X interpolation zones */
-/*
- * Called by plaid_tcb() to read the interpolation zone table from the
- * character data in the font.
- * Sets up a table of interpolation coefficients with one entry for
- * every X or Y interpolation zone.
- * Updates the pointer to the byte following the interpolation zone
- * data.
- */
-{
-fix15 i, j, k, l, n;
-ufix8 format;
-ufix8 format_copy;
-ufix8 tmpufix8;
-fix15 start_orus = 0;
-ufix8 edge_org;
-ufix8 edge;
-ufix16 adj_factor;
-fix15 adj_orus;
-fix15 end_orus = 0;
-fix31 zone_orus;
-fix15 start_pix = 0;
-fix15 end_pix = 0;
-
-
-#if INCL_PLAID_OUT /* Plaid data monitoring included? */
-begin_int_zones(no_X_int_zones, no_Y_int_zones);
-#endif
-
-i = 0;
-edge_org = 0;
-n = no_X_int_zones;
-for (j = 0; ; j++)
- {
- for (k = 0; k < n; k++)
- {
- format = NEXT_BYTE(pointer);
- if (format & BIT7) /* Short start/end point spec? */
- {
- tmpufix8 = NEXT_BYTE(pointer);
- edge = edge_org + (tmpufix8 & 0xf);
- start_orus = sp_plaid.orus[edge];
- start_pix = sp_plaid.pix[edge];
- edge = edge_org + (tmpufix8 >> 4);
- end_orus = sp_plaid.orus[edge];
- end_pix = sp_plaid.pix[edge];
- }
- else /* Standard start and end point spec? */
- {
- format_copy = format;
- for (l = 0; ; l++) /* Loop for start and end point */
- {
- switch (format_copy & 0x7) /* Decode start/end point format */
- {
-
- case 0: /* Index to control edge */
- edge = edge_org + NEXT_BYTE(pointer);
- end_orus = sp_plaid.orus[edge];
- end_pix = sp_plaid.pix[edge];
- break;
-
- case 1: /* 1 byte fractional distance to next edge */
- adj_factor = 0xffff & NEXT_BYTE(pointer) << 8;
- goto L1;
-
-
- case 2: /* 2 byte fractional distance to next edge */
- adj_factor = 0xffff & NEXT_WORD(pointer);
- L1: edge = edge_org + NEXT_BYTE(pointer);
- end_orus = sp_plaid.orus[edge] +
- ((((fix31)sp_plaid.orus[edge + 1] - (fix31)sp_plaid.orus[edge]) *
- (ufix32)adj_factor + (fix31)32768) >> 16);
- end_pix = sp_plaid.pix[edge] +
- ((((fix31)sp_plaid.pix[edge + 1] - (fix31)sp_plaid.pix[edge]) *
- (ufix32)adj_factor + (fix31)32768) >> 16);
- break;
-
- case 3: /* 1 byte delta orus before first edge */
- adj_orus = -(fix15)NEXT_BYTE(pointer);
- goto L2;
-
- case 4: /* 2 byte delta orus before first edge */
- adj_orus = -NEXT_WORD(pointer);
- L2: edge = edge_org;
- goto L4;
-
- case 5: /* 1 byte delta orus after last edge */
- adj_orus = (fix15)NEXT_BYTE(pointer);
- goto L3;
-
- case 6: /* 2 byte delta orus after last edge */
- adj_orus = NEXT_WORD(pointer);
- L3: edge = j? sp_globals.Y_edge_org + sp_globals.no_Y_orus - 1: sp_globals.no_X_orus - 1;
- L4: end_orus = sp_plaid.orus[edge] + adj_orus;
- end_pix = sp_plaid.pix[edge] +
- (((fix31)adj_orus * (fix31)(j? sp_globals.tcb.yppo: sp_globals.tcb.xppo) +
- sp_globals.mprnd) / (1<<sp_globals.mpshift));
- break;
-
- }
-
- if (l) /* Second time round loop? */
- break;
- format_copy >>= 3; /* Adj format to decode end point format */
- start_orus = end_orus; /* Save start point oru value */
- start_pix = end_pix; /* Save start point pixel value */
- }
- }
-#if INCL_PLAID_OUT /* Plaid data monitoring included? */
- record_int_zone(
- (fix31)start_pix << (16 - sp_globals.pixshift),
- (fix31)end_pix << (16 - sp_globals.pixshift));
-#endif
- zone_orus = (fix31)end_orus - (fix31)start_orus;
- sp_plaid.mult[i] = ((((fix31)end_pix - (fix31)start_pix) << sp_globals.mpshift) +
- (zone_orus / 2)) / zone_orus;
- sp_plaid.offset[i] =
- (((((fix31)start_pix + (fix31)end_pix) << sp_globals.mpshift) -
- ((fix31)sp_plaid.mult[i] * ((fix31)start_orus + (fix31)end_orus))) / 2) +
- sp_globals.mprnd;
- i++;
- }
- if (j) /* Finished? */
- break;
- edge_org = sp_globals.Y_edge_org; /* Prepare to process Y ctrl zones */
- n = no_Y_int_zones;
- }
-
-#if DEBUG
-printf("\nX INT TABLE\n");
-n = no_X_int_zones;
-for (i = 0; i < n; i++)
- {
- printf("%2d %7.4f %7.4f\n", i,
- (real)sp_plaid.mult[i] / (real)(1 << sp_globals.multshift),
- (real)sp_plaid.offset[i] / (real)(1 << sp_globals.multshift));
- }
-printf("\nY INT TABLE\n");
-n = no_Y_int_zones;
-for (i = 0; i < n; i++)
- {
- j = i + no_X_int_zones;
- printf("%2d %7.4f %7.4f\n", i,
- (real)sp_plaid.mult[j] / (real)(1 << sp_globals.multshift),
- (real)sp_plaid.offset[j] / (real)(1 << sp_globals.multshift));
- }
-#endif
-
-return pointer;
-}
-#if INCL_ISW
-FUNCTION fix31 compute_isw_scale(/** GDECL **/ void)
-{
-fix31 isw_scale;
-
-if (sp_globals.setwidth_orus == 0)
- isw_scale = 0x00010000;
-else
- isw_scale = ((fix31)sp_globals.imported_width << 16)/
- (fix31)sp_globals.setwidth_orus;
-return isw_scale;
-}
-#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-26 09:31:44 +0000