diff options
Diffstat (limited to 'libXfont/src/Speedo/out_blk.c')
| -rw-r--r-- | libXfont/src/Speedo/out_blk.c | 706 |
1 files changed, 0 insertions, 706 deletions
diff --git a/libXfont/src/Speedo/out_blk.c b/libXfont/src/Speedo/out_blk.c deleted file mode 100644 index a5b669b2a..000000000 --- a/libXfont/src/Speedo/out_blk.c +++ /dev/null @@ -1,706 +0,0 @@ -/* $Xorg: out_blk.c,v 1.3 2000/08/17 19:46:26 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/out_blk.c,v 1.2 1999/02/07 06:18:16 dawes Exp $ */ - - -/*************************** O U T _ B L K . C ********************************* - * * - * This is an output module for black-writer mode. * - * * - *****************************************************************************/ - - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif -#include "spdo_prv.h" /* General definitions for Speedo */ - -#define DEBUG 0 -#define LOCAL static -#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_BLACK -static void sp_add_intercept_black(PROTO_DECL2 fix15 y, fix15 x); -static void sp_proc_intercepts_black(PROTO_DECL1); -#endif - - -#if INCL_BLACK -FUNCTION boolean init_black( -GDECL -specs_t GLOBALFAR *specsarg) -/* - * init_out0() is called by sp_set_specs() to initialize the output module. - * Returns TRUE if output module can accept requested specifications. - * Returns FALSE otherwise. - */ -{ -#if DEBUG -printf("INIT_BLK()\n"); -#endif -if (specsarg->flags & CURVES_OUT) - return FALSE; /* Curves out not supported */ -return (TRUE); -} -#endif - - -#if INCL_BLACK -FUNCTION boolean begin_char_black( -GDECL -point_t Psw, -point_t Pmin, -point_t Pmax) -/* Called once at the start of the character generation process - */ -{ -#if DEBUG -printf("BEGIN_CHAR_BLACK(%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 -init_char_out(Psw,Pmin,Pmax); -return TRUE; -} -#endif - - -#if INCL_BLACK -FUNCTION void begin_contour_black( -GDECL -point_t P1, -boolean outside) -/* Called at the start of each contour - */ -{ - -#if DEBUG -printf("BEGIN_CONTOUR_BLACK(%3.1f, %3.1f, %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; -sp_globals.y_pxl = (sp_globals.y0_spxl + sp_globals.pixrnd) >> sp_globals.pixshift; -} -#endif - -#if INCL_BLACK -FUNCTION void line_black( -GDECL -point_t P1) -/* Called for each vector in the transformed character - */ -{ -register fix15 how_many_y; /* # of intercepts at y = n + 1/2 */ -register fix15 yc, i; /* 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 x0,y0,x1,y1; /* PIX.FRAC start and endpoints */ - -x0 = sp_globals.x0_spxl; /* get start of line (== current point) */ -y0 = sp_globals.y0_spxl; -sp_globals.x0_spxl = x1 = P1.x; /* end of line */ -sp_globals.y0_spxl = y1 = P1.y; /* (also update current point to end of line) */ - -yc = sp_globals.y_pxl; /* current scan line = end of last line */ -sp_globals.y_pxl = (y1 + sp_globals.pixrnd) >> sp_globals.pixshift; /* calculate new end-scan sp_globals.line */ - - -#if DEBUG -printf("LINE_BLACK(%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) return; - -if ((how_many_y = sp_globals.y_pxl - yc) == 0) return; /* Don't draw a null line */ - -if (how_many_y < 0) yc--; /* Predecrment downward lines */ - -if (yc > sp_globals.y_band.band_max) /* Is start point above band? */ - { - if (sp_globals.y_pxl > sp_globals.y_band.band_max) return; /* line has to go down! */ - how_many_y = sp_globals.y_pxl - (yc = sp_globals.y_band.band_max) - 1; /* Yes, limit it */ - } - -if (yc < sp_globals.y_band.band_min) /* Is start point below band? */ - { - if (sp_globals.y_pxl < sp_globals.y_band.band_min) return; /* line has to go up! */ - how_many_y = sp_globals.y_pxl - (yc = sp_globals.y_band.band_min); /* Yes, limit it */ - } - -xc = (fix31)(x0 + sp_globals.pixrnd) << (16 - sp_globals.pixshift); /* Original x coordinate with built in */ - /* rounding. 16.16 form */ - - -if ( (temp1 = (x1 - x0)) == 0) /* check for vertical line */ - { - yc -= sp_globals.y_band.band_min; /* yc is now an offset relative to the band */ - temp1 = (fix15)(xc >> 16); - if (how_many_y < 0) - { /* Vector down */ - if ((how_many_y += yc + 1) < 0) how_many_y = 0; /* can't go below 0 */ - for (i = yc; i >= how_many_y; i--) - sp_add_intercept_black(i,temp1); - } - else - { /* Vector up */ - /* check to see that line doesn't extend beyond top of band */ - if ((how_many_y += yc) > sp_globals.no_y_lists) how_many_y = sp_globals.no_y_lists; - for (i = yc; i != how_many_y; i++) - sp_add_intercept_black(i,temp1); - } - return; - } - -/* 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 independant. */ - -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 */ - (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); - } -else - { -/* 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 shift it to be a 16.16 delta */ - - xc += ((fix31)temp1 * dx_dy) >> sp_globals.pixshift; - } - -yc -= sp_globals.y_band.band_min; /* yc is now an offset relative to the band */ - -if (how_many_y < 0) - { /* Vector down */ - if (how_many_y == -1) - sp_add_intercept_black(yc, (fix15) (xc >> 16)); - else - { - if ((how_many_y += yc + 1) < 0) how_many_y = 0; /* can't go below 0 */ - for (i = yc; i >= how_many_y; i--) - { - temp1 = (fix15)(xc >> 16); - sp_add_intercept_black(i,temp1); - xc -= dx_dy; - } - } - } - else - { /* Vector up */ - /* check to see that line doesn't extend beyond top of band */ - if (how_many_y == 1) - sp_add_intercept_black(yc, (fix15) (xc >> 16)); - else - { - if ((how_many_y += yc) > sp_globals.no_y_lists) how_many_y = sp_globals.no_y_lists; - for (i = yc; i != how_many_y; i++) - { - temp1 = (fix15)(xc >> 16); - sp_add_intercept_black(i,temp1); - xc += dx_dy; - } - } - } -} -#endif -#if INCL_BLACK -FUNCTION boolean end_char_black() -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 bmap_max, bmap_min; -#endif - -#if DEBUG -printf("END_CHAR_BLACK()\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; - init_intercepts_out(); - sp_globals.first_pass = FALSE; - sp_globals.extents_running = FALSE; - return FALSE; - } - else - { - sp_proc_intercepts_black(); - close_bitmap(); - return TRUE; - } - } -else - { - if (sp_globals.intercept_oflo) - { - reduce_band_size_out(); - init_intercepts_out(); - return FALSE; - } - else - { - sp_proc_intercepts_black(); - if (next_band_out()) - { - init_intercepts_out(); - return FALSE; - } - close_bitmap(); - return TRUE; - } - } -} -#endif - -#if INCL_BLACK -FUNCTION LOCAL void sp_add_intercept_black( -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 -printf(" Add intercept(%2d, %d)\n", y + sp_globals.y_band.band_min,x); - -/* Bounds checking IS done in debug mode */ -if (y < 0) /* Y value below bottom of current band? */ - { - printf(" Intecerpt less than 0!!!\007\n"); - return; - } - -if (y > (sp_globals.no_y_lists - 1)) /* Y value above top of current band? */ - { - printf(" Intercept too big for band!!!!!\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 "sp_globals.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 - -#if INCL_BLACK -FUNCTION LOCAL void sp_proc_intercepts_black() -GDECL - -/* Called by sp_make_char to output accumulated intercept lists - * Clips output to sp_globals.xmin, sp_globals.xmax, sp_globals.ymin, sp_globals.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 first_y, last_y; - -#if DEBUG -printf("\nIntercept lists:\n"); -#endif - -#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; - xmin = sp_globals.clip_xmin; - } -if (!clipright) - xmax = ((sp_globals.set_width.x+32768L) >> 16); -#endif - -if ((first_y = sp_globals.y_band.band_max) >= sp_globals.ymax) - first_y = sp_globals.ymax - 1; /* Clip to sp_globals.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_min; -#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] - sp_globals.xmin) < 0) - from = 0; /* Clip to sp_globals.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.xmax) - to = sp_globals.xmax - sp_globals.xmin; /* Clip to sp_globals.xmax boundary */ - else - to -= sp_globals.xmin; - printf(" Y = %2d (scanline %2d): %d %d:\n", - y + sp_globals.y_band.band_min, scan_line, from, to); - } - } -#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] - sp_globals.xmin) < 0) - from = 0; /* Clip to sp_globals.xmin boundary */ - i = sp_intercepts.cdr[i]; /* Link to next intercept */ - - if ((to = sp_intercepts.car[i]) > sp_globals.xmax) - to = sp_globals.xmax - sp_globals.xmin; /* Clip to sp_globals.xmax boundary */ - else - to -= sp_globals.xmin; - if (from >= to) - { - if (from >= sp_globals.xmax - sp_globals.xmin) - { - --from ; - } - to = from+1; - } -#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 - set_bitmap_bits(scan_line, from, to); - } - } -} - -#endif - - - - |