--- /dev/null
+/* $XConsortium: set_trns.c,v 1.6 94/02/10 11:05:59 gildea 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.
+
+*/
+
+
+
+/*************************** 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.
+ * *
+ ****************************************************************************/
+
+
+#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 *****/
+
+#if PROTOS_AVAIL
+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);
+#else
+static void sp_constr_update(); /* Update constraint table */
+static ufix8 FONTFAR *sp_setup_pix_table(); /* Read control zone table */
+static ufix8 FONTFAR *sp_setup_int_table(); /* Read interpolation zone table */
+#endif
+
+\f
+FUNCTION void init_tcb()
+GDECL
+/*
+ * 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;
+}
+\f
+FUNCTION void scale_tcb(ptcb, x_pos, y_pos, x_scale, y_scale)
+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 */
+}
+\f
+FUNCTION ufix8 FONTFAR *skip_interpolation_table(pointer,format)
+GDECL
+ufix8 FONTFAR *pointer; /* Pointer to next byte in char data */
+ufix8 format; /* Character format byte */
+{
+fix15 i,n;
+ufix8 intsize[9];
+
+intsize[0] = 1;
+intsize[1] = 2;
+intsize[2] = 3;
+intsize[3] = 1;
+intsize[4] = 2;
+intsize[5] = 1;
+intsize[6] = 2;
+intsize[7] = 0;
+intsize[8] = 0;
+
+n = ((format & BIT6)? (fix15)NEXT_BYTE(pointer): 0) +
+ ((format & BIT7)? (fix15)NEXT_BYTE(pointer): 0);
+for (i = 0; i < n; i++) /* For each entry in int table ... */
+ {
+ format = NEXT_BYTE(pointer); /* Read format byte */
+ if (format & BIT7) /* Short Start/End point spec? */
+ {
+ pointer++; /* Skip Start/End point byte */
+ }
+ else
+ {
+ pointer += intsize[format & 0x7]; /* Skip Start point spec */
+ pointer += intsize[(format >> 3) & 0x7]; /* Skip End point spec */
+ }
+ }
+return pointer;
+}
+FUNCTION ufix8 FONTFAR *skip_control_zone(pointer,format)
+GDECL
+ufix8 FONTFAR *pointer; /* Pointer to next byte in char data */
+ufix8 format; /* Character format byte */
+{
+fix15 i,n;
+ufix16 tmpufix16;
+fix15 constr;
+
+n = sp_globals.no_X_orus + sp_globals.no_Y_orus - 2;
+for (i = 0; i < n; i++) /* For each entry in control table ... */
+ {
+ if (format & BIT4)
+ pointer++; /* Skip short form From/To fields */
+ else
+ pointer += 2; /* Skip FROM and TO fields */
+ /* skip constraints field */
+ constr = NEXT_BYTES (pointer, tmpufix16);
+
+ }
+return pointer;
+}
+\f
+#if INCL_RULES
+#else
+FUNCTION ufix8 FONTFAR *plaid_tcb(pointer, format)
+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 skip all other intelligent scaling rules embedded
+ * in the character data.
+ * Updates pointer to first byte after plaid data.
+ * This is used only if intelligent scaling is not supported in the
+ * configuration definitions.
+ */
+{
+fix15 i, n;
+
+
+
+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 */
+sp_globals.Y_edge_org = sp_globals.no_X_orus;
+
+/* Skip over control zone table */
+pointer = skip_control_zone(pointer,format);
+
+/* Skip over interpolation table */
+pointer = skip_interpolation_table(pointer,format);
+return pointer;
+}
+#endif
+\f
+#if INCL_RULES
+FUNCTION ufix8 FONTFAR *plaid_tcb(pointer, format)
+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;
+}
+#endif
+\f
+#if INCL_RULES
+FUNCTION static void sp_constr_update()
+GDECL
+/*
+ * 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
+
+}
+#endif
+\f
+FUNCTION ufix8 FONTFAR *read_oru_table(pointer)
+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;
+
+#if INCL_RULES
+fix15 pos;
+#endif
+
+i = 0;
+n = sp_globals.no_X_orus;
+#if INCL_RULES
+pos = sp_globals.tcb.xpos;
+#endif
+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? */
+ {
+#if INCL_RULES
+ sp_plaid.pix[i] = pos; /* Insert position in pix array */
+#endif
+ 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? */
+ {
+#if INCL_RULES
+ sp_plaid.pix[i] = pos; /* Insert position in pix array */
+#endif
+ 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 */
+#if INCL_RULES
+ pos = sp_globals.tcb.ypos;
+#endif
+ }
+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 */
+}
+#if INCL_SQUEEZING || INCL_ISW
+FUNCTION static void calculate_x_pix(start_edge, end_edge, constr_nr,
+ x_scale, x_offset, ppo, setwidth_pix)
+GDECL
+ufix8 start_edge, 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
+\f
+#if INCL_SQUEEZING
+FUNCTION static void calculate_y_pix(start_edge, end_edge,constr_nr,
+ top_scale, bottom_scale,ppo,em_top_pix, em_bot_pix)
+GDECL
+ufix8 start_edge, end_edge;
+ufix16 constr_nr;
+fix31 top_scale, bottom_scale;
+fix31 ppo;
+fix15 em_top_pix, 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;
+}
+\f
+FUNCTION boolean calculate_x_scale(x_factor, x_offset, no_X_ctrl_zones)
+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;
+}
+\f
+FUNCTION boolean calculate_y_scale(top_scale, bottom_scale,
+ first_Y_zone, no_Y_ctrl_zones)
+GDECL
+fix31 *top_scale, *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
+\f
+#if INCL_RULES
+FUNCTION static ufix8 FONTFAR *sp_setup_pix_table(
+ pointer, short_form, no_X_ctrl_zones, no_Y_ctrl_zones)
+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;
+fix31 xppo0; /* top level pixels per oru */
+fix31 yppo0; /* top level pixels per oru */
+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;
+xppo0 = sp_globals.tcb0.xppo;
+yppo0 = sp_globals.tcb0.yppo;
+#if INCL_SQUEEZING || INCL_ISW
+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;
+}
+#endif
+
+\f
+#if INCL_RULES
+FUNCTION static ufix8 FONTFAR *sp_setup_int_table(pointer, no_X_int_zones, no_Y_int_zones)
+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;
+ufix8 edge_org;
+ufix8 edge;
+ufix16 adj_factor;
+fix15 adj_orus;
+fix15 end_orus;
+fix31 zone_orus;
+fix15 start_pix;
+fix15 end_pix;
+
+
+#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;
+}
+#endif
+#if INCL_ISW
+FUNCTION fix31 compute_isw_scale()
+GDECL
+{
+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
projects / rdpsrv / blobdiff