+++ /dev/null
-/* $XConsortium: out_bl2d.c,v 1.5 94/02/07 10:01:15 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.
-
-*/
-
-/*************************** O U T _ B L 2 D . C *****************************
- * *
- * This is an output module for screen writer using two dimensional scanning *
- ****************************************************************************/
-
-
-#include "spdo_prv.h" /* General definitions for speedo */
-
-#define CLOCKWISE 1
-#define DEBUG 0
-#define ABS(X) ( (X < 0) ? -X : X)
-
-#if DEBUG
-#include <stdio.h>
-#define SHOW(X) printf("X = %d\n", X)
-#else
-#define SHOW(X)
-#endif
-
-/***** GLOBAL VARIABLES *****/
-
-/***** GLOBAL FUNCTIONS *****/
-
-/***** EXTERNAL VARIABLES *****/
-
-/***** EXTERNAL FUNCTIONS *****/
-
-/***** STATIC VARIABLES *****/
-
-/***** STATIC FUNCTIONS *****/
-
-#if INCL_2D
-#if PROTOS_AVAIL
-static void sp_draw_vector_to_2d(PROTO_DECL2 fix15 x0,fix15 y0,fix15 x1,fix15 y1,band_t GLOBALFAR *band);
-static void sp_add_intercept_2d(PROTO_DECL2 fix15 y,fix15 x);
-static void sp_proc_intercepts_2d(PROTO_DECL1);
-#else
-static void sp_add_intercept_2d();
-static void sp_proc_intercepts_2d();
-static void sp_draw_vector_to_2d();
-#endif
-#endif
-
-#if INCL_2D
-FUNCTION boolean init_2d(specsarg)
-GDECL
-specs_t GLOBALFAR *specsarg;
-/*
- * init_out_2d() is called by sp_set_specs() to initialize the output module.
- * Returns TRUE if output module can accept requested specifications.
- * Returns FALSE otherwise.
- */
-{
-
-if (specsarg->flags & CURVES_OUT)
- return FALSE; /* Curves out, clipping not supported */
-
-#if DEBUG
-printf("INIT_OUT__2d()\n");
-#endif
-return TRUE;
-}
-#endif
-\f
-#if INCL_2D
-FUNCTION boolean begin_char_2d(Psw, Pmin, Pmax)
-GDECL
-point_t Psw;
-point_t Pmin;
-point_t Pmax;
-/* Called once at the start of the character generation process
- * Initializes intercept table, either calculates pixel maxima or
- * decides that they need to be collected
- */
-{
-#if DEBUG
-printf("BEGIN_CHAR__2d(%3.1f, %3.1f, %3.1f, %3.1f, %3.1f, %3.1f\n",
- (real)Psw.x / (real)sp_globals.onepix, (real)Psw.y / (real)sp_globals.onepix,
- (real)Pmin.x / (real)sp_globals.onepix, (real)Pmin.y / (real)sp_globals.onepix,
- (real)Pmax.x / (real)sp_globals.onepix, (real)Pmax.y / (real)sp_globals.onepix);
-#endif
-/* Convert PIX.FRAC to 16.16 form */
-sp_globals.x_scan_active = TRUE; /* Assume x-scanning from the start */
-
-init_char_out(Psw,Pmin,Pmax);
-return TRUE;
-}
-#endif
-
-\f
-#if INCL_2D
-FUNCTION void begin_contour_2d(P1, outside)
-GDECL
-point_t P1;
-boolean outside;
-/* Called at the start of each contour
- */
-{
-
-#if DEBUG
-printf("BEGIN_CONTOUR__2d(%3.4f, %3.4f, %s)\n",
- (real)P1.x / (real)sp_globals.onepix,
- (real)P1.y / (real)sp_globals.onepix,
- outside? "outside": "inside");
-#endif
-sp_globals.x0_spxl = P1.x;
-sp_globals.y0_spxl = P1.y;
-}
-#endif
-\f
-#if INCL_2D
-FUNCTION void line_2d(P1)
-GDECL
-point_t P1;
-/*
- * Called for each vector in the transformed character
- * "draws" vector into intercept table
- */
-{
-
-#if DEBUG
-printf("LINE_0(%3.4f, %3.4f)\n",
- (real)P1.x / (real)sp_globals.onepix,
- (real)P1.y / (real)sp_globals.onepix);
-#endif
-
-if (sp_globals.extents_running)
- {
- if (sp_globals.x0_spxl > sp_globals.bmap_xmax)
- sp_globals.bmap_xmax = sp_globals.x0_spxl;
- if (sp_globals.x0_spxl < sp_globals.bmap_xmin)
- sp_globals.bmap_xmin = sp_globals.x0_spxl;
- if (sp_globals.y0_spxl > sp_globals.bmap_ymax)
- sp_globals.bmap_ymax = sp_globals.y0_spxl;
- if (sp_globals.y0_spxl < sp_globals.bmap_ymin)
- sp_globals.bmap_ymin = sp_globals.y0_spxl;
- }
-
-if (!sp_globals.intercept_oflo)
- {
- sp_draw_vector_to_2d(sp_globals.x0_spxl,
- sp_globals.y0_spxl,
- P1.x,
- P1.y,
- &sp_globals.y_band); /* y-scan */
-
- if (sp_globals.x_scan_active)
- sp_draw_vector_to_2d(sp_globals.y0_spxl,
- sp_globals.x0_spxl,
- P1.y,
- P1.x,
- &sp_globals.x_band); /* x-scan if selected */
- }
-
-sp_globals.x0_spxl = P1.x;
-sp_globals.y0_spxl = P1.y; /* update endpoint */
-}
-\f
-FUNCTION static void sp_draw_vector_to_2d(x0, y0, x1, y1, band)
-GDECL
-fix15 x0; /* X coordinate */
-fix15 y0; /* Y coordinate */
-fix15 x1;
-fix15 y1;
-band_t GLOBALFAR *band;
-{
-register fix15 how_many_y; /* # of intercepts at y = n + 1/2 */
-register fix15 yc; /* Current scan-line */
- fix15 temp1; /* various uses */
- fix15 temp2; /* various uses */
-register fix31 dx_dy; /* slope of line in 16.16 form */
-register fix31 xc; /* high-precision (16.16) x coordinate */
- fix15 y_pxl;
-
-yc = (y0 + sp_globals.pixrnd) >> sp_globals.pixshift; /* current scan line = end of last line */
-y_pxl = (y1 + sp_globals.pixrnd) >> sp_globals.pixshift; /* calculate new end-scan line */
-
-if ((how_many_y = y_pxl - yc) == 0) return; /* Don't draw a null line */
-
-if (how_many_y < 0) yc--; /* Predecrment downward lines */
-
-if (yc > band->band_max) /* Is start point above band? */
- {
- if (y_pxl > band->band_max) return; /* line has to go down! */
- how_many_y = y_pxl - (yc = band->band_max) - 1; /* Yes, limit it */
- }
-
-if (yc < band->band_min) /* Is start point below band? */
- {
- if (y_pxl < band->band_min) return; /* line has to go up! */
- how_many_y = y_pxl - (yc = band->band_min); /* Yes, limit it */
- }
-
-xc = (fix31)(x0 + sp_globals.pixrnd) << 16; /* Original x coordinate with built in */
- /* rounding. int.16 + pixshift form */
-
-if ( (temp1 = (x1 - x0)) == 0) /* check for vertical line */
- {
- dx_dy = 0L; /* Zero slope, leave xc alone */
- goto skip_calc;
- }
-
-/* calculate dx_dy at 16.16 fixed point */
-
-dx_dy = ( (fix31)temp1 << 16 )/(fix31)(y1 - y0);
-
-/* We have to check for a @#$%@# possible multiply overflow */
-/* by doing another @#$*& multiply. In assembly language, */
-/* the program could just check the OVerflow flag or whatever*/
-/* works on the particular processor. This C code is meant */
-/* to be processor independent. */
-
-temp1 = (yc << sp_globals.pixshift) - y0 + sp_globals.pixrnd;
-/* This sees if the sign bits start at bit 15 */
-/* if they do, no overflow has occurred */
-
-temp2 = (fix15)(MULT16(temp1,(fix15)(dx_dy >> 16)) >> 15);
-
-if ( (temp2 != (fix15)0xFFFF) &&
- (temp2 != 0x0000) )
- { /* Overflow. Pick point closest to yc + .5 */
- if (ABS(temp1) < ABS((yc << sp_globals.pixshift) - y1 + sp_globals.pixrnd))
- { /* use x1 instead of x0 */
- xc = (fix31)(x1 + sp_globals.pixrnd) << (16 - sp_globals.pixshift);
- }
- goto skip_calc;
- }
-/* calculate new xc at the center of the *current* scan line */
-/* due to banding, yc may be several lines away from y0 */
-/* xc += (yc + .5 - y0) * dx_dy */
-/* This multiply generates a subpixel delta. */
-/* So we leave it as an int.pixshift + 16 delta */
-
-xc += (fix31)temp1 * dx_dy;
-dx_dy <<= sp_globals.pixshift;
-skip_calc:
-
-yc -= band->band_array_offset; /* yc is now an offset relative to the band */
-
-if (how_many_y < 0)
- { /* Vector down */
- if ((how_many_y += yc + 1) < band->band_floor)
- how_many_y = band->band_floor; /* can't go below floor */
- while(yc >= how_many_y)
- {
- temp1 = (fix15)(xc >> 16);
- sp_add_intercept_2d(yc--,temp1);
- xc -= dx_dy;
- }
- }
- else
- { /* Vector up */
- /* check to see that line doesn't extend beyond top of band */
- if ((how_many_y += yc) > band->band_ceiling)
- how_many_y = band->band_ceiling;
- while(yc < how_many_y)
- {
- temp1 = (fix15)(xc >> 16);
- sp_add_intercept_2d(yc++,temp1);
- xc += dx_dy;
- }
- }
-}
-
-#endif
-\f
-#if INCL_2D
-FUNCTION boolean end_char_2d()
-GDECL
-/* Called when all character data has been output
- * Return TRUE if output process is complete
- * Return FALSE to repeat output of the transformed data beginning
- * with the first contour
- */
-{
-
-fix31 xorg;
-fix31 yorg;
-#if INCL_CLIPPING
-fix31 em_max, em_min, bmap_max, bmap_min;
-#endif
-
-#if DEBUG
-printf("END_CHAR__2d()\n");
-#endif
-
-if (sp_globals.first_pass)
- {
- if (sp_globals.bmap_xmax >= sp_globals.bmap_xmin)
- {
- sp_globals.xmin = (sp_globals.bmap_xmin + sp_globals.pixrnd + 1) >> sp_globals.pixshift;
- sp_globals.xmax = (sp_globals.bmap_xmax + sp_globals.pixrnd) >> sp_globals.pixshift;
- }
- else
- {
- sp_globals.xmin = sp_globals.xmax = 0;
- }
- if (sp_globals.bmap_ymax >= sp_globals.bmap_ymin)
- {
-
-#if INCL_CLIPPING
- switch(sp_globals.tcb0.xtype)
- {
- case 1: /* 180 degree rotation */
- if (sp_globals.specs.flags & CLIP_TOP)
- {
- sp_globals.clip_ymin = (fix31)((fix31)EM_TOP * sp_globals.tcb0.yppo + ((1<<sp_globals.multshift)/2));
- sp_globals.clip_ymin = sp_globals.clip_ymin >> sp_globals.multshift;
- bmap_min = (sp_globals.bmap_ymin + sp_globals.pixrnd + 1) >> sp_globals.pixshift;
- sp_globals.clip_ymin = -1 * sp_globals.clip_ymin;
- if (bmap_min < sp_globals.clip_ymin)
- sp_globals.ymin = sp_globals.clip_ymin;
- else
- sp_globals.ymin = bmap_min;
- }
- if (sp_globals.specs.flags & CLIP_BOTTOM)
- {
- sp_globals.clip_ymax = (fix31)((fix31)(-1 * EM_BOT) * sp_globals.tcb0.yppo + ((1<<sp_globals.multshift)/2));
- sp_globals.clip_ymax = sp_globals.clip_ymax >> sp_globals.multshift;
- bmap_max = (sp_globals.bmap_ymax + sp_globals.pixrnd) >> sp_globals.pixshift;
- if (bmap_max < sp_globals.clip_ymax)
- sp_globals.ymax = bmap_max;
- else
- sp_globals.ymax = sp_globals.clip_ymax;
- }
- sp_globals.clip_xmax = -sp_globals.xmin;
- sp_globals.clip_xmin = ((sp_globals.set_width.x+32768L) >> 16) -
- sp_globals.xmin;
- break;
- case 2: /* 90 degree rotation */
- if (sp_globals.specs.flags & CLIP_TOP)
- {
- sp_globals.clip_xmin = (fix31)((fix31)(-1 * EM_BOT) * sp_globals.tcb0.yppo + ((1<<sp_globals.multshift)/2));
- sp_globals.clip_xmin = sp_globals.clip_xmin >> sp_globals.multshift;
- sp_globals.clip_xmin = -1 * sp_globals.clip_xmin;
- bmap_min = (sp_globals.bmap_xmin + sp_globals.pixrnd + 1) >> sp_globals.pixshift;
- if (bmap_min > sp_globals.clip_xmin)
- sp_globals.clip_xmin = bmap_min;
-
- /* normalize to x origin */
- sp_globals.clip_xmin -= sp_globals.xmin;
- }
- if (sp_globals.specs.flags & CLIP_BOTTOM)
- {
- sp_globals.clip_xmax = (fix31)((fix31)EM_TOP * sp_globals.tcb0.yppo + ((1<<sp_globals.multshift)/2));
- sp_globals.clip_xmax = sp_globals.clip_xmax >> sp_globals.multshift;
- bmap_max = (sp_globals.bmap_xmax + sp_globals.pixrnd) >> sp_globals.pixshift;
- if (bmap_max < sp_globals.clip_xmax)
- sp_globals.xmax = bmap_max;
- else
- sp_globals.xmax = sp_globals.clip_xmax;
- sp_globals.clip_ymax = 0;
- if ((sp_globals.specs.flags & CLIP_TOP) &&
- (sp_globals.ymax > sp_globals.clip_ymax))
- sp_globals.ymax = sp_globals.clip_ymax;
- sp_globals.clip_ymin = ((sp_globals.set_width.y+32768L) >> 16);
- if ((sp_globals.specs.flags & CLIP_BOTTOM) &&
- (sp_globals.ymin < sp_globals.clip_ymin))
- sp_globals.ymin = sp_globals.clip_ymin;
- /* normalize to x origin */
- sp_globals.clip_xmax -= sp_globals.xmin;
- }
- break;
- case 3: /* 270 degree rotation */
- if (sp_globals.specs.flags & CLIP_TOP)
- {
- sp_globals.clip_xmin = (fix31)((fix31)EM_TOP * sp_globals.tcb0.yppo + ((1<<sp_globals.multshift)/2));
- sp_globals.clip_xmin = sp_globals.clip_xmin >> sp_globals.multshift;
- sp_globals.clip_xmin = -1 * sp_globals.clip_xmin;
- bmap_min = (sp_globals.bmap_xmin + sp_globals.pixrnd + 1) >> sp_globals.pixshift;
-
- /* let the minimum be the larger of these two values */
- if (bmap_min > sp_globals.clip_xmin)
- sp_globals.clip_xmin = bmap_min;
-
- /* normalize the x value to new xorgin */
- sp_globals.clip_xmin -= sp_globals.xmin;
- }
- if (sp_globals.specs.flags & CLIP_BOTTOM)
- {
- sp_globals.clip_xmax = (fix31)((fix31)(-1 * EM_BOT) * sp_globals.tcb0.yppo + ((1<<sp_globals.multshift)/2));
- sp_globals.clip_xmax = sp_globals.clip_xmax >> sp_globals.multshift;
- bmap_max = (sp_globals.bmap_xmax + sp_globals.pixrnd) >> sp_globals.pixshift;
-
- /* let the max be the lesser of these two values */
- if (bmap_max < sp_globals.clip_xmax)
- {
- sp_globals.xmax = bmap_max;
- sp_globals.clip_xmax = bmap_max;
- }
- else
- sp_globals.xmax = sp_globals.clip_xmax;
-
- /* normalize the x value to new x origin */
- sp_globals.clip_xmax -= sp_globals.xmin;
- }
- /* compute y clip values */
- sp_globals.clip_ymax = ((sp_globals.set_width.y+32768L) >> 16);
- if ((sp_globals.specs.flags & CLIP_TOP) &&
- (sp_globals.ymax > sp_globals.clip_ymax))
- sp_globals.ymax = sp_globals.clip_ymax;
- sp_globals.clip_ymin = 0;
- if ((sp_globals.specs.flags & CLIP_BOTTOM) &&
- (sp_globals.ymin < sp_globals.clip_ymin))
- sp_globals.ymin = sp_globals.clip_ymin;
- break;
- default: /* this is for zero degree rotation and arbitrary rotation */
- if (sp_globals.specs.flags & CLIP_TOP)
- {
- sp_globals.clip_ymax = (fix31)((fix31)EM_TOP * sp_globals.tcb0.yppo + ((1<<sp_globals.multshift)/2));
- sp_globals.clip_ymax = sp_globals.clip_ymax >> sp_globals.multshift;
- bmap_max = (sp_globals.bmap_ymax + sp_globals.pixrnd) >> sp_globals.pixshift;
- if (bmap_max > sp_globals.clip_ymax)
- sp_globals.ymax = bmap_max;
- else
- sp_globals.ymax = sp_globals.clip_ymax;
- }
- if (sp_globals.specs.flags & CLIP_BOTTOM)
- {
- sp_globals.clip_ymin = (fix31)((fix31)(-1 * EM_BOT) * sp_globals.tcb0.yppo + ((1<<sp_globals.multshift)/2));
- sp_globals.clip_ymin = sp_globals.clip_ymin >> sp_globals.multshift;
- sp_globals.clip_ymin = - sp_globals.clip_ymin;
- bmap_min = (sp_globals.bmap_ymin + sp_globals.pixrnd + 1) >> sp_globals.pixshift;
- if (bmap_min < sp_globals.clip_ymin)
- sp_globals.ymin = sp_globals.clip_ymin;
- else
- sp_globals.ymin = bmap_min;
- }
- sp_globals.clip_xmin = -sp_globals.xmin;
- sp_globals.clip_xmax = ((sp_globals.set_width.x+32768L) >> 16) -
- sp_globals.xmin;
- break;
- }
-if ( !(sp_globals.specs.flags & CLIP_TOP))
-#endif
- sp_globals.ymax = (sp_globals.bmap_ymax + sp_globals.pixrnd) >> sp_globals.pixshift;
-
-#if INCL_CLIPPING
-if ( !(sp_globals.specs.flags & CLIP_BOTTOM))
-#endif
- sp_globals.ymin = (sp_globals.bmap_ymin + sp_globals.pixrnd + 1) >> sp_globals.pixshift;
- }
- else
- {
- sp_globals.ymin = sp_globals.ymax = 0;
- }
-
- /* add in the rounded out part (from xform.) of the left edge */
- if (sp_globals.tcb.xmode == 0) /* for X pix is function of X orus only add the round */
- xorg = (((fix31)sp_globals.xmin << 16) + (sp_globals.rnd_xmin << sp_globals.poshift));
- else
- if (sp_globals.tcb.xmode == 1) /* for X pix is function of -X orus only, subtr. round */
- xorg = (((fix31)sp_globals.xmin << 16) - (sp_globals.rnd_xmin << sp_globals.poshift)) ;
- else
- xorg = (fix31)sp_globals.xmin << 16; /* for other cases don't use round on x */
-
- if (sp_globals.tcb.ymode == 2) /* for Y pix is function of X orus only, add round error */
- yorg = (((fix31)sp_globals.ymin << 16) + (sp_globals.rnd_xmin << sp_globals.poshift));
- else
- if (sp_globals.tcb.ymode == 3) /* for Y pix is function of -X orus only, sub round */
- yorg = (((fix31)sp_globals.ymin << 16) - (sp_globals.rnd_xmin << sp_globals.poshift));
- else /* all other cases have no round error on yorg */
- yorg = (fix31)sp_globals.ymin << 16;
-
- open_bitmap(sp_globals.set_width.x, sp_globals.set_width.y, xorg, yorg,
- sp_globals.xmax - sp_globals.xmin, sp_globals.ymax - sp_globals.ymin);
- if (sp_globals.intercept_oflo)
- {
- sp_globals.y_band.band_min = sp_globals.ymin;
- sp_globals.y_band.band_max = sp_globals.ymax;
- sp_globals.x_scan_active = FALSE;
- sp_globals.no_x_lists = 0;
- init_intercepts_out();
- sp_globals.first_pass = FALSE;
- sp_globals.extents_running = FALSE;
- return FALSE;
- }
- else
- {
- sp_proc_intercepts_2d();
- close_bitmap();
- return TRUE;
- }
- }
-else
- {
- if (sp_globals.intercept_oflo)
- {
- reduce_band_size_out();
- init_intercepts_out();
- return FALSE;
- }
- else
- {
- sp_proc_intercepts_2d();
- if (next_band_out())
- {
- init_intercepts_out();
- return FALSE;
- }
- close_bitmap();
- return TRUE;
- }
- }
-}
-#endif
-\f
-#if INCL_2D
-FUNCTION static void sp_add_intercept_2d(y, x)
-GDECL
-fix15 y; /* Y coordinate in relative pixel units */
- /* (0 is lowest sample in band) */
-fix15 x; /* X coordinate of intercept in subpixel units */
-
-/* Called by line() to add an intercept to the intercept list structure
- */
-
-{
-register fix15 from; /* Insertion pointers for the linked list sort */
-register fix15 to;
-
-#if DEBUG
-/* Bounds checking IS done in debug mode */
-if ((y >= MAX_INTERCEPTS) || (y < 0))
- {
- printf("Intercept out of table!!!!! (%d)\n",y);
- return;
- }
-
-if (y >= sp_globals.no_y_lists)
- {
- printf(" Add x intercept(%2d, %f)\n",
- y + sp_globals.x_band.band_min - sp_globals.no_y_lists,
- (real)x/(real)sp_globals.onepix);
- if (y > (sp_globals.no_x_lists + sp_globals.no_y_lists))
- {
- printf(" Intercept too big for band!!!!!\007\n");
- return;
- }
- }
- else
- {
- printf(" Add y intercept(%2d, %f)\n", y + sp_globals.y_band.band_min,(real)x/(real)sp_globals.onepix);
- }
-
-if (y < 0) /* Y value below bottom of current band? */
- {
- printf(" Intecerpt less than 0!!!\007\n");
- return;
- }
-#endif
-
-/* Store new values */
-
-sp_intercepts.car[sp_globals.next_offset] = x;
-
-/* Find slot to insert new element (between from and to) */
-
-from = y; /* Start at list head */
-
-while( (to = sp_intercepts.cdr[from]) >= sp_globals.first_offset) /* Until to == end of list */
- {
- if (x <= sp_intercepts.car[to]) /* If next item is larger than or same as this one... */
- goto insert_element; /* ... drop out and insert here */
- from = to; /* move forward in list */
- }
-
-insert_element: /* insert element "next_offset" between elements "from" */
- /* and "to" */
-
-sp_intercepts.cdr[from] = sp_globals.next_offset;
-sp_intercepts.cdr[sp_globals.next_offset] = to;
-
-if (++sp_globals.next_offset >= MAX_INTERCEPTS) /* Intercept buffer full? */
- {
- sp_globals.intercept_oflo = TRUE;
-/* There may be a few more calls to "add_intercept" from the current line */
-/* To avoid problems, we set next_offset to a safe value. We don't care */
-/* if the intercept table gets trashed at this point */
- sp_globals.next_offset = sp_globals.first_offset;
- }
-}
-
-#endif
-\f
-#if INCL_2D
-FUNCTION static void sp_proc_intercepts_2d()
-GDECL
-/* Called by sp_make_char to output accumulated intercept lists
- * Clips output to xmin, xmax, sp_globals.ymin, ymax boundaries
- */
-{
-register fix15 i;
-register fix15 from, to; /* Start and end of run in pixel units
- relative to left extent of character */
-register fix15 y;
-register fix15 scan_line;
- fix15 local_bmap_xmin;
- fix15 local_bmap_xmax;
- fix15 first_y, last_y;
- fix15 j,k;
- fix15 xmin, xmax;
- boolean clipleft, clipright;
-
-#if INCL_CLIPPING
-if ((sp_globals.specs.flags & CLIP_LEFT) != 0)
- clipleft = TRUE;
-else
- clipleft = FALSE;
-if ((sp_globals.specs.flags & CLIP_RIGHT) != 0)
- clipright = TRUE;
-else
- clipright = FALSE;
-if (clipleft || clipright)
- {
- xmax = sp_globals.clip_xmax << sp_globals.pixshift;
- xmin = sp_globals.clip_xmin << sp_globals.pixshift;
- }
-if (!clipright)
- xmax = ((sp_globals.set_width.x+32768L) >> 16);
-#endif
-
-if (sp_globals.x_scan_active) /* If xscanning, we need to make sure we don't miss any important pixels */
- {
- first_y = sp_globals.x_band.band_floor; /* start of x lists */
- last_y = sp_globals.x_band.band_ceiling; /* end of x lists */
- for (y = first_y; y != last_y; y++) /* scan all xlists */
- {
- i = sp_intercepts.cdr[y]; /* Index head of intercept list */
- while (i != 0) /* Link to next intercept if present */
- {
- from = sp_intercepts.car[i];
- j = i;
- i = sp_intercepts.cdr[i]; /* Link to next intercept */
- if (i == 0) /* End of list? */
- {
-#if DEBUG
- printf("****** proc_intercepts: odd number of intercepts in x list\n");
-#endif
- break;
- }
- to = sp_intercepts.car[i];
- k = sp_intercepts.cdr[i];
- if (((to >> sp_globals.pixshift) >= (from >> sp_globals.pixshift)) &&
- ((to - from) < (sp_globals.onepix + 1)))
- {
- from = ((fix31)to + (fix31)from - (fix31)sp_globals.onepix) >> (sp_globals.pixshift + 1);
- if (from > sp_globals.y_band.band_max)
- from = sp_globals.y_band.band_max;
- if ((from -= sp_globals.y_band.band_min) < 0)
- from = 0;
- to = ((y - sp_globals.x_band.band_floor + sp_globals.x_band.band_min)
- << sp_globals.pixshift)
- + sp_globals.pixrnd;
- sp_intercepts.car[j] = to;
- sp_intercepts.car[i] = to + sp_globals.onepix;
- sp_intercepts.cdr[i] = sp_intercepts.cdr[from];
- sp_intercepts.cdr[from] = j;
- }
-skip_xint: i = k;
- }
- }
- }
-#if DEBUG
-printf("\nIntercept lists:\n");
-#endif
-
-if ((first_y = sp_globals.y_band.band_max) >= sp_globals.ymax)
- first_y = sp_globals.ymax - 1; /* Clip to ymax boundary */
-
-if ((last_y = sp_globals.y_band.band_min) < sp_globals.ymin)
- last_y = sp_globals.ymin; /* Clip to sp_globals.ymin boundary */
-
-last_y -= sp_globals.y_band.band_array_offset;
-
-local_bmap_xmin = sp_globals.xmin << sp_globals.pixshift;
-local_bmap_xmax = (sp_globals.xmax << sp_globals.pixshift) + sp_globals.pixrnd;
-
-#if DEBUG
-/* Print out all of the intercept info */
-scan_line = sp_globals.ymax - first_y - 1;
-
-for (y = first_y - sp_globals.y_band.band_min; y >= last_y; y--, scan_line++)
- {
- i = y; /* Index head of intercept list */
- while ((i = sp_intercepts.cdr[i]) != 0) /* Link to next intercept if present */
- {
- if ((from = sp_intercepts.car[i] - local_bmap_xmin) < 0)
- from = 0; /* Clip to xmin boundary */
- i = sp_intercepts.cdr[i]; /* Link to next intercept */
- if (i == 0) /* End of list? */
- {
- printf("****** proc_intercepts: odd number of intercepts\n");
- break;
- }
- if ((to = sp_intercepts.car[i]) > sp_globals.bmap_xmax)
- to = sp_globals.bmap_xmax - local_bmap_xmin; /* Clip to xmax boundary */
- else
- to -= local_bmap_xmin;
- printf(" Y = %2d (scanline %2d): %3.4f %3.4f:\n",
- y + sp_globals.y_band.band_min,
- scan_line,
- (real)from / (real)sp_globals.onepix,
- (real)to / (real)sp_globals.onepix);
- }
- }
-#endif
-
-/* Draw the image */
-scan_line = sp_globals.ymax - first_y - 1;
-
-for (y = first_y - sp_globals.y_band.band_min; y >= last_y; y--, scan_line++)
- {
- i = y; /* Index head of intercept list */
- while ((i = sp_intercepts.cdr[i]) != 0) /* Link to next intercept if present */
- {
- if ((from = sp_intercepts.car[i] - local_bmap_xmin) < 0)
- from = 0; /* Clip to xmin boundary */
- i = sp_intercepts.cdr[i]; /* Link to next intercept */
-
- if ((to = sp_intercepts.car[i]) > local_bmap_xmax)
- to = sp_globals.bmap_xmax - local_bmap_xmin; /* Clip to xmax boundary */
- else
- to -= local_bmap_xmin;
-#if INCL_CLIPPING
- if (clipleft)
- {
- if (to <= xmin)
- continue;
- if (from < xmin)
- from = xmin;
- }
- if (clipright)
- {
- if (from >= xmax)
- continue;
- if (to > xmax)
- to = xmax;
- }
-#endif
- if ( (to - from) <= sp_globals.onepix)
- {
- from = (to + from - sp_globals.onepix) >> (sp_globals.pixshift + 1);
- set_bitmap_bits(scan_line, from, from + 1);
- }
- else
- {
- set_bitmap_bits(scan_line, from >> sp_globals.pixshift, to >> sp_globals.pixshift);
- }
- }
- }
-}
-
-#endif
projects / rdpsrv / blobdiff