/* ********************************************************************** */ /* xvertext 5.0, Copyright (c) 1993 Alan Richardson (mppa3@uk.ac.sussex.syma) * * The X Consortium, and any party obtaining a copy of these files from * the X Consortium, directly or indirectly, is granted, free of charge, a * full and unrestricted irrevocable, world-wide, paid up, royalty-free, * nonexclusive right and license to deal in this software and * documentation files (the "Software"), including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons who receive * copies from any such party to do so, with the only requirement being * that this copyright notice remain intact. This license includes without * limitation a license to do the foregoing actions under any patents of * the party supplying this software to the X Consortium. */ /* ********************************************************************** */ /* BETTER: xvertext now does rotation at any angle!! * * BEWARE: function arguments have CHANGED since version 2.0!! */ /* ********************************************************************** */ #include "fig.h" #include "resources.h" #include #include "w_rottext.h" /* ---------------------------------------------------------------------- */ /* Make sure cache size is set */ #ifndef CACHE_SIZE_LIMIT #define CACHE_SIZE_LIMIT 0 #endif /*CACHE_SIZE_LIMIT */ /* Cache by FID if can't find name because OpenWindows screws up */ #define CACHE_FID /* Make sure a cache method is specified */ #ifndef CACHE_XIMAGES #ifndef CACHE_BITMAPS #define CACHE_BITMAPS #endif /*CACHE_BITMAPS*/ #endif /*CACHE_XIMAGES*/ /* ---------------------------------------------------------------------- */ /* Debugging macros */ #define DEBUG_PRINT1(a) if (appres.DEBUG) printf (a) #define DEBUG_PRINT2(a, b) if (appres.DEBUG) printf (a, b) #define DEBUG_PRINT3(a, b, c) if (appres.DEBUG) printf (a, b, c) #define DEBUG_PRINT4(a, b, c, d) if (appres.DEBUG) printf (a, b, c, d) #define DEBUG_PRINT5(a, b, c, d, e) if (appres.DEBUG) printf (a, b, c, d, e) /* ---------------------------------------------------------------------- */ /* A structure holding everything needed for a rotated string */ typedef struct rotated_text_item_template { Pixmap bitmap; XImage *ximage; char *text; char *font_name; Font fid; float angle; int align; float magnify; int cols_in; int rows_in; int cols_out; int rows_out; int nl; int max_width; float *corners_x; float *corners_y; long int size; int cached; struct rotated_text_item_template *next; } RotatedTextItem; RotatedTextItem *first_text_item=NULL; /* ---------------------------------------------------------------------- */ /* A structure holding current magnification and bounding box padding */ static struct style_template { float magnify; int bbx_pad; } style={ 1., 0 }; /* ---------------------------------------------------------------------- */ static char *my_strdup(); static char *my_strtok(); float XRotVersion(); void XRotSetMagnification(); void XRotSetBoundingBoxPad(); int XRotDrawString(); int XRotDrawImageString(); int XRotDrawAlignedString(); int XRotDrawAlignedImageString(); XPoint *XRotTextExtents(); static XImage *MakeXImage(); static int XRotPaintAlignedString(); static int XRotDrawHorizontalString(); static RotatedTextItem *XRotRetrieveFromCache(); static RotatedTextItem *XRotCreateTextItem(); static void XRotAddToLinkedList(); static void XRotFreeTextItem(); static XImage *XRotMagnifyImage(); /* ---------------------------------------------------------------------- */ /**************************************************************************/ /* Routine to mimic `strdup()' (some machines don't have it) */ /**************************************************************************/ static char *my_strdup(str) char *str; { char *s; if(str==NULL) return NULL; s=(char *)malloc((unsigned)(strlen(str)+1)); if(s!=NULL) strcpy(s, str); return s; } /* ---------------------------------------------------------------------- */ /**************************************************************************/ /* Routine to replace `strtok' : this one returns a zero length string if */ /* it encounters two consecutive delimiters */ /**************************************************************************/ static char *my_strtok(str1, str2) char *str1, *str2; { char *ret; int i, j, stop; static int start, len; static char *stext; if(str2==NULL) return NULL; /* initialise if str1 not NULL */ if(str1!=NULL) { start=0; stext=str1; len=strlen(str1); } /* run out of tokens ? */ if(start>=len) return NULL; /* loop through characters */ for(i=start; i0.) style.magnify=m; } /* ---------------------------------------------------------------------- */ /**************************************************************************/ /* Set the padding used when calculating bounding boxes */ /**************************************************************************/ void XRotSetBoundingBoxPad(p) int p; { if(p>=0) style.bbx_pad=p; } /* ---------------------------------------------------------------------- */ /**************************************************************************/ /* Create an XImage structure and allocate memory for it */ /**************************************************************************/ static XImage *MakeXImage(dpy, w, h) Display *dpy; int w, h; { XImage *I; char *data; /* reserve memory for image */ data=(char *)calloc((unsigned)(((w-1)/8+1)*h), 1); if(data==NULL) return NULL; /* create the XImage */ I=XCreateImage(dpy, DefaultVisual(dpy, DefaultScreen(dpy)), 1, XYBitmap, 0, data, w, h, 8, 0); if(I==NULL) return NULL; I->byte_order=I->bitmap_bit_order=MSBFirst; return I; } /* ---------------------------------------------------------------------- */ /**************************************************************************/ /* A front end to XRotPaintAlignedString: */ /* -no alignment, no background */ /**************************************************************************/ int XRotDrawString(dpy, font, angle, drawable, gc, x, y, str) Display *dpy; XFontStruct *font; float angle; Drawable drawable; GC gc; int x, y; char *str; { return (XRotPaintAlignedString(dpy, font, angle, drawable, gc, x, y, str, NONE, 0)); } /* ---------------------------------------------------------------------- */ /**************************************************************************/ /* A front end to XRotPaintAlignedString: */ /* -no alignment, paints background */ /**************************************************************************/ int XRotDrawImageString(dpy, font, angle, drawable, gc, x, y, str) Display *dpy; XFontStruct *font; float angle; Drawable drawable; GC gc; int x, y; char *str; { return(XRotPaintAlignedString(dpy, font, angle, drawable, gc, x, y, str, NONE, 1)); } /* ---------------------------------------------------------------------- */ /**************************************************************************/ /* A front end to XRotPaintAlignedString: */ /* -does alignment, no background */ /**************************************************************************/ int XRotDrawAlignedString(dpy, font, angle, drawable, gc, x, y, text, align) Display *dpy; XFontStruct *font; float angle; Drawable drawable; GC gc; int x, y; char *text; int align; { return(XRotPaintAlignedString(dpy, font, angle, drawable, gc, x, y, text, align, 0)); } /* ---------------------------------------------------------------------- */ /**************************************************************************/ /* A front end to XRotPaintAlignedString: */ /* -does alignment, paints background */ /**************************************************************************/ int XRotDrawAlignedImageString(dpy, font, angle, drawable, gc, x, y, text, align) Display *dpy; XFontStruct *font; float angle; Drawable drawable; GC gc; int x, y; char *text; int align; { return(XRotPaintAlignedString(dpy, font, angle, drawable, gc, x, y, text, align, 1)); } /* ---------------------------------------------------------------------- */ /**************************************************************************/ /* Aligns and paints a rotated string */ /**************************************************************************/ static int XRotPaintAlignedString(dpy, font, angle, drawable, gc, x, y, text, align, bg) Display *dpy; XFontStruct *font; float angle; Drawable drawable; GC gc; int x, y; char *text; int align; int bg; { int i; GC my_gc; int xp, yp; float hot_x, hot_y; float hot_xp, hot_yp; float sin_angle, cos_angle; RotatedTextItem *item; Pixmap bitmap_to_paint; /* return early for NULL/empty strings */ if(text==NULL || *text=='\0') return 0; /* manipulate angle to 0<=angle<2*PI radians */ while(angle<0.0) angle+=M_2PI; while(angle>=M_2PI) angle-=M_2PI; /* horizontal text made easy */ if(angle==0. && style.magnify==1.) return(XRotDrawHorizontalString(dpy, font, drawable, gc, x, y, text, align, bg)); /* get a rotated bitmap */ item=XRotRetrieveFromCache(dpy, font, angle, text, align); if(item==NULL) return 0; /* this gc has similar properties to the user's gc */ my_gc=XCreateGC(dpy, drawable, (unsigned long) 0, 0); XCopyGC(dpy, gc, GCForeground|GCBackground|GCFunction|GCPlaneMask, my_gc); /* alignment : which point (hot_x, hot_y) relative to bitmap centre coincides with user's specified point? */ /* y position */ if(align==TLEFT || align==TCENTRE || align==TRIGHT) hot_y=(float)item->rows_in/2*style.magnify; else if(align==MLEFT || align==MCENTRE || align==MRIGHT) hot_y=0; else if(align==BLEFT || align==BCENTRE || align==BRIGHT) hot_y= -(float)item->rows_in/2*style.magnify; else hot_y= -((float)item->rows_in/2-(float)font->descent)*style.magnify; /* x position */ if(align==TLEFT || align==MLEFT || align==BLEFT || align==NONE) hot_x= -(float)item->max_width/2*style.magnify; else if(align==TCENTRE || align==MCENTRE || align==BCENTRE) hot_x=0; else hot_x=(float)item->max_width/2*style.magnify; /* pre-calculate sin and cos */ sin_angle=sin(angle); cos_angle=cos(angle); /* rotate hot_x and hot_y around bitmap centre */ hot_xp= hot_x*cos_angle - hot_y*sin_angle; hot_yp= hot_x*sin_angle + hot_y*cos_angle; /* text background will be drawn using XFillPolygon */ if(bg) { GC depth_one_gc; XPoint *xpoints; Pixmap empty_stipple; /* reserve space for XPoints */ xpoints=(XPoint *)malloc((unsigned)(4*item->nl*sizeof(XPoint))); if(!xpoints) return 1; /* rotate corner positions */ for(i=0; i<4*item->nl; i++) { xpoints[i].x=(float)x + ( (item->corners_x[i]-hot_x)*cos_angle + (item->corners_y[i]+hot_y)*sin_angle); xpoints[i].y=(float)y + (-(item->corners_x[i]-hot_x)*sin_angle + (item->corners_y[i]+hot_y)*cos_angle); } /* we want to swap foreground and background colors here; XGetGCValues() is only available in R4+ */ empty_stipple=XCreatePixmap(dpy, drawable, 1, 1, 1); depth_one_gc=XCreateGC(dpy, empty_stipple, (unsigned long) 0, 0); XSetForeground(dpy, depth_one_gc, 0); XFillRectangle(dpy, empty_stipple, depth_one_gc, 0, 0, 2, 2); XSetStipple(dpy, my_gc, empty_stipple); XSetFillStyle(dpy, my_gc, FillOpaqueStippled); XFillPolygon(dpy, drawable, my_gc, xpoints, 4*item->nl, Nonconvex, CoordModeOrigin); /* free our resources */ free((char *)xpoints); XFreeGC(dpy, depth_one_gc); XFreePixmap(dpy, empty_stipple); } /* where should top left corner of bitmap go ? */ xp=(float)x-((float)item->cols_out/2 +hot_xp); yp=(float)y-((float)item->rows_out/2 -hot_yp); /* by default we draw the rotated bitmap, solid */ bitmap_to_paint=item->bitmap; /* handle user stippling */ #ifndef X11R3 { GC depth_one_gc; XGCValues values; Pixmap new_bitmap, inverse; /* try and get some GC properties */ if(XGetGCValues(dpy, gc, GCStipple|GCFillStyle|GCForeground|GCBackground| GCTileStipXOrigin|GCTileStipYOrigin, &values)) { /* only do this if stippling requested */ if((values.fill_style==FillStippled || values.fill_style==FillOpaqueStippled) && !bg) { /* opaque stipple: draw rotated text in background colour */ if(values.fill_style==FillOpaqueStippled) { XSetForeground(dpy, my_gc, values.background); XSetFillStyle(dpy, my_gc, FillStippled); XSetStipple(dpy, my_gc, item->bitmap); XSetTSOrigin(dpy, my_gc, xp, yp); XFillRectangle(dpy, drawable, my_gc, xp, yp, item->cols_out, item->rows_out); XSetForeground(dpy, my_gc, values.foreground); } /* this will merge the rotated text and the user's stipple */ new_bitmap=XCreatePixmap(dpy, drawable, item->cols_out, item->rows_out, 1); /* create a GC */ depth_one_gc=XCreateGC(dpy, new_bitmap, (unsigned long) 0, 0); XSetForeground(dpy, depth_one_gc, 1); XSetBackground(dpy, depth_one_gc, 0); /* set the relative stipple origin */ XSetTSOrigin(dpy, depth_one_gc, values.ts_x_origin-xp, values.ts_y_origin-yp); /* fill the whole bitmap with the user's stipple */ XSetStipple(dpy, depth_one_gc, values.stipple); XSetFillStyle(dpy, depth_one_gc, FillOpaqueStippled); XFillRectangle(dpy, new_bitmap, depth_one_gc, 0, 0, item->cols_out, item->rows_out); /* set stipple origin back to normal */ XSetTSOrigin(dpy, depth_one_gc, 0, 0); /* this will contain an inverse copy of the rotated text */ inverse=XCreatePixmap(dpy, drawable, item->cols_out, item->rows_out, 1); /* invert text */ XSetFillStyle(dpy, depth_one_gc, FillSolid); XSetFunction(dpy, depth_one_gc, GXcopyInverted); XCopyArea(dpy, item->bitmap, inverse, depth_one_gc, 0, 0, item->cols_out, item->rows_out, 0, 0); /* now delete user's stipple everywhere EXCEPT on text */ XSetForeground(dpy, depth_one_gc, 0); XSetBackground(dpy, depth_one_gc, 1); XSetStipple(dpy, depth_one_gc, inverse); XSetFillStyle(dpy, depth_one_gc, FillStippled); XSetFunction(dpy, depth_one_gc, GXcopy); XFillRectangle(dpy, new_bitmap, depth_one_gc, 0, 0, item->cols_out, item->rows_out); /* free resources */ XFreePixmap(dpy, inverse); XFreeGC(dpy, depth_one_gc); /* this is the new bitmap */ bitmap_to_paint=new_bitmap; } } } #endif /*X11R3*/ /* paint text using stipple technique */ XSetFillStyle(dpy, my_gc, FillStippled); XSetStipple(dpy, my_gc, bitmap_to_paint); XSetTSOrigin(dpy, my_gc, xp, yp); XFillRectangle(dpy, drawable, my_gc, xp, yp, item->cols_out, item->rows_out); /* free our resources */ XFreeGC(dpy, my_gc); /* stippled bitmap no longer needed */ if(bitmap_to_paint!=item->bitmap) XFreePixmap(dpy, bitmap_to_paint); #ifdef CACHE_XIMAGES XFreePixmap(dpy, item->bitmap); #endif /*CACHE_XIMAGES*/ /* if item isn't cached, destroy it completely */ if(!item->cached) XRotFreeTextItem(dpy,item); /* we got to the end OK! */ return 0; } /* ---------------------------------------------------------------------- */ /**************************************************************************/ /* Draw a horizontal string in a quick fashion */ /**************************************************************************/ static int XRotDrawHorizontalString(dpy, font, drawable, gc, x, y, text, align, bg) Display *dpy; XFontStruct *font; Drawable drawable; GC gc; int x, y; char *text; int align; int bg; { GC my_gc; int nl=1, i; int height; int xp, yp; char *str1, *str2, *str3; char *str2_a="\0", *str2_b="\n\0"; int dir, asc, desc; XCharStruct overall; if (text == NULL || *text=='\0') { DEBUG_PRINT1("Empty string, ignoring\n"); return 0; } /* this gc has similar properties to the user's gc (including stipple) */ my_gc=XCreateGC(dpy, drawable, (unsigned long) 0, 0); XCopyGC(dpy, gc, GCForeground|GCBackground|GCFunction|GCStipple|GCFillStyle| GCTileStipXOrigin|GCTileStipYOrigin|GCPlaneMask, my_gc); XSetFont(dpy, my_gc, font->fid); /* count number of sections in string */ if(align!=NONE) for(i=0; iascent+font->descent; /* y position */ if(align==TLEFT || align==TCENTRE || align==TRIGHT) yp=y+font->ascent; else if(align==MLEFT || align==MCENTRE || align==MRIGHT) yp=y-nl*height/2+font->ascent; else if(align==BLEFT || align==BCENTRE || align==BRIGHT) yp=y-nl*height+font->ascent; else yp=y; str1=my_strdup(text); if(str1==NULL) return 1; str3=my_strtok(str1, str2); /* loop through each section in the string */ do { XTextExtents(font, str3, strlen(str3), &dir, &asc, &desc, &overall); /* where to draw section in x ? */ if(align==TLEFT || align==MLEFT || align==BLEFT || align==NONE) xp=x; else if(align==TCENTRE || align==MCENTRE || align==BCENTRE) xp=x-overall.rbearing/2; else xp=x-overall.rbearing; /* draw string onto bitmap */ if(!bg) XDrawString(dpy, drawable, my_gc, xp, yp, str3, strlen(str3)); else XDrawImageString(dpy, drawable, my_gc, xp, yp, str3, strlen(str3)); /* move to next line */ yp+=height; str3=my_strtok((char *)NULL, str2); } while(str3!=NULL); free(str1); XFreeGC(dpy, my_gc); return 0; } /* ---------------------------------------------------------------------- */ /**************************************************************************/ /* Query cache for a match with this font/text/angle/alignment */ /* request, otherwise arrange for its creation */ /**************************************************************************/ static RotatedTextItem *XRotRetrieveFromCache(dpy, font, angle, text, align) Display *dpy; XFontStruct *font; float angle; char *text; int align; { Font fid; char *font_name=NULL; unsigned long name_value; RotatedTextItem *item=NULL; RotatedTextItem *i1=first_text_item; /* get font name, if it exists */ if(XGetFontProperty(font, XA_FONT, &name_value)) { DEBUG_PRINT1("got font name OK\n"); font_name=XGetAtomName(dpy, name_value); fid=0; } #ifdef CACHE_FID /* otherwise rely (unreliably?) on font ID */ else { DEBUG_PRINT1("can't get fontname, caching FID\n"); font_name=NULL; fid=font->fid; } #else /* not allowed to cache font ID's */ else { DEBUG_PRINT1("can't get fontname, can't cache\n"); font_name=NULL; fid=0; } #endif /*CACHE_FID*/ /* look for a match in cache */ /* matching formula: identical text; identical fontname (if defined, font ID's if not); angles close enough (<0.00001 here, could be smaller); HORIZONTAL alignment matches, OR it's a one line string; magnifications the same */ while(i1 && !item) { /* match everything EXCEPT fontname/ID */ if(strcmp(text, i1->text)==0 && fabs(angle-i1->angle)<0.00001 && style.magnify==i1->magnify && (i1->nl==1 || ((align==0)?9:(align-1))%3== ((i1->align==0)?9:(i1->align-1))%3)) { /* now match fontname/ID */ if(font_name!=NULL && i1->font_name!=NULL) { if(strcmp(font_name, i1->font_name)==0) { item=i1; DEBUG_PRINT1("Matched against font names\n"); } else i1=i1->next; } #ifdef CACHE_FID else if(font_name==NULL && i1->font_name==NULL) { if(fid==i1->fid) { item=i1; DEBUG_PRINT1("Matched against FID's\n"); } else i1=i1->next; } #endif /*CACHE_FID*/ else i1=i1->next; } else i1=i1->next; } if(item) DEBUG_PRINT1("**Found target in cache.\n"); if(!item) DEBUG_PRINT1("**No match in cache.\n"); /* no match */ if(!item) { /* create new item */ item=XRotCreateTextItem(dpy, font, angle, text, align); if(!item) return NULL; /* record what it shows */ item->text=my_strdup(text); /* fontname or ID */ if(font_name!=NULL) { item->font_name=my_strdup(font_name); item->fid=0; } else { item->font_name=NULL; item->fid=fid; } item->angle=angle; item->align=align; item->magnify=style.magnify; /* cache it */ XRotAddToLinkedList(dpy, item); } if(font_name) XFree(font_name); /* if XImage is cached, need to recreate the bitmap */ #ifdef CACHE_XIMAGES { GC depth_one_gc; /* create bitmap to hold rotated text */ item->bitmap=XCreatePixmap(dpy, DefaultRootWindow(dpy), item->cols_out, item->rows_out, 1); /* depth one gc */ depth_one_gc=XCreateGC(dpy, item->bitmap, (unsigned long) 0, 0); XSetBackground(dpy, depth_one_gc, 0); XSetForeground(dpy, depth_one_gc, 1); /* make the text bitmap from XImage */ XPutImage(dpy, item->bitmap, depth_one_gc, item->ximage, 0, 0, 0, 0, item->cols_out, item->rows_out); XFreeGC(dpy, depth_one_gc); } #endif /*CACHE_XIMAGES*/ return item; } /* ---------------------------------------------------------------------- */ /**************************************************************************/ /* Create a rotated text item */ /**************************************************************************/ static RotatedTextItem *XRotCreateTextItem(dpy, font, angle, text, align) Display *dpy; XFontStruct *font; float angle; char *text; int align; { RotatedTextItem *item=NULL; Pixmap canvas; GC font_gc; XImage *I_in; register int i, j; char *str1, *str2, *str3; char *str2_a="\0", *str2_b="\n\0"; int height; int byte_w_in, byte_w_out; int xp, yp; float sin_angle, cos_angle; int it, jt; float di, dj; int ic=0; float xl, xr, xinc; int byte_out; int dir, asc, desc; XCharStruct overall; int old_cols_in=0, old_rows_in=0; /* allocate memory */ item=(RotatedTextItem *)malloc((unsigned)sizeof(RotatedTextItem)); if(!item) return NULL; /* count number of sections in string */ item->nl=1; if(align!=NONE) for(i=0; inl++; /* ignore newline characters if not doing alignment */ if(align==NONE) str2=str2_a; else str2=str2_b; /* find width of longest section */ str1=my_strdup(text); if(str1==NULL) return NULL; str3=my_strtok(str1, str2); XTextExtents(font, str3, strlen(str3), &dir, &asc, &desc, &overall); item->max_width=overall.rbearing; /* loop through each section */ do { str3=my_strtok((char *)NULL, str2); if(str3!=NULL) { XTextExtents(font, str3, strlen(str3), &dir, &asc, &desc, &overall); if(overall.rbearing>item->max_width) item->max_width=overall.rbearing; } } while(str3!=NULL); free(str1); /* overall font height */ height=font->ascent+font->descent; /* dimensions horizontal text will have */ item->cols_in=item->max_width; item->rows_in=item->nl*height; /* bitmap for drawing on */ canvas=XCreatePixmap(dpy, DefaultRootWindow(dpy), item->cols_in, item->rows_in, 1); /* create a GC for the bitmap */ font_gc=XCreateGC(dpy, canvas, (unsigned long) 0, 0); XSetBackground(dpy, font_gc, 0); XSetFont(dpy, font_gc, font->fid); /* make sure the bitmap is blank */ XSetForeground(dpy, font_gc, 0); XFillRectangle(dpy, canvas, font_gc, 0, 0, item->cols_in+1, item->rows_in+1); XSetForeground(dpy, font_gc, 1); /* pre-calculate sin and cos */ sin_angle=sin(angle); cos_angle=cos(angle); /* text background will be drawn using XFillPolygon */ item->corners_x= (float *)malloc((unsigned)(4*item->nl*sizeof(float))); if(!item->corners_x) return NULL; item->corners_y= (float *)malloc((unsigned)(4*item->nl*sizeof(float))); if(!item->corners_y) return NULL; /* draw text horizontally */ /* start at top of bitmap */ yp=font->ascent; str1=my_strdup(text); if(str1==NULL) return NULL; str3=my_strtok(str1, str2); /* loop through each section in the string */ do { XTextExtents(font, str3, strlen(str3), &dir, &asc, &desc, &overall); /* where to draw section in x ? */ if(align==TLEFT || align==MLEFT || align==BLEFT || align==NONE) xp=0; else if(align==TCENTRE || align==MCENTRE || align==BCENTRE) xp=(item->max_width-overall.rbearing)/2; else xp=item->max_width-overall.rbearing; /* draw string onto bitmap */ XDrawString(dpy, canvas, font_gc, xp, yp, str3, strlen(str3)); /* keep a note of corner positions of this string */ item->corners_x[ic]=((float)xp-(float)item->cols_in/2)*style.magnify; item->corners_y[ic]=((float)(yp-font->ascent)-(float)item->rows_in/2) *style.magnify; item->corners_x[ic+1]=item->corners_x[ic]; item->corners_y[ic+1]=item->corners_y[ic]+(float)height*style.magnify; item->corners_x[item->nl*4-1-ic]=item->corners_x[ic]+ (float)overall.rbearing*style.magnify; item->corners_y[item->nl*4-1-ic]=item->corners_y[ic]; item->corners_x[item->nl*4-2-ic]= item->corners_x[item->nl*4-1-ic]; item->corners_y[item->nl*4-2-ic]=item->corners_y[ic+1]; ic+=2; /* move to next line */ yp+=height; str3=my_strtok((char *)NULL, str2); } while(str3!=NULL); free(str1); /* create image to hold horizontal text */ I_in=MakeXImage(dpy, item->cols_in, item->rows_in); if(I_in==NULL) return NULL; /* extract horizontal text */ XGetSubImage(dpy, canvas, 0, 0, item->cols_in, item->rows_in, 1, XYPixmap, I_in, 0, 0); I_in->format=XYBitmap; /* magnify horizontal text */ if(style.magnify!=1.) { I_in=XRotMagnifyImage(dpy, I_in); old_cols_in=item->cols_in; old_rows_in=item->rows_in; item->cols_in=(float)item->cols_in*style.magnify; item->rows_in=(float)item->rows_in*style.magnify; } /* how big will rotated text be ? */ item->cols_out=fabs((float)item->rows_in*sin_angle) + fabs((float)item->cols_in*cos_angle) +0.99999 +2; item->rows_out=fabs((float)item->rows_in*cos_angle) + fabs((float)item->cols_in*sin_angle) +0.99999 +2; if(item->cols_out%2==0) item->cols_out++; if(item->rows_out%2==0) item->rows_out++; /* create image to hold rotated text */ item->ximage=MakeXImage(dpy, item->cols_out, item->rows_out); if(item->ximage==NULL) return NULL; byte_w_in=(item->cols_in-1)/8+1; byte_w_out=(item->cols_out-1)/8+1; /* we try to make this bit as fast as possible - which is why it looks a bit over-the-top */ /* vertical distance from centre */ dj=0.5-(float)item->rows_out/2; /* where abouts does text actually lie in rotated image? */ /* check angle within 0.5 degrees (0.008 radians) */ if(fabs((double)angle)<0.008 || fabs((double)angle-M_PI/2)<0.008 || fabs((double)angle-M_PI)<0.008 || fabs((double)angle-3*M_PI/2)<0.008) { xl=0; xr=(float)item->cols_out; xinc=0; } else if(anglecols_out/2+ (dj-(float)item->rows_in/(2*cos_angle))/ tan(angle)-2; xr=(float)item->cols_out/2+ (dj+(float)item->rows_in/(2*cos_angle))/ tan(angle)+2; xinc=1./tan(angle); } else { xl=(float)item->cols_out/2+ (dj+(float)item->rows_in/(2*cos_angle))/ tan(angle)-2; xr=(float)item->cols_out/2+ (dj-(float)item->rows_in/(2*cos_angle))/ tan(angle)+2; xinc=1./tan(angle); } /* loop through all relevent bits in rotated image */ for(j=0; jrows_out; j++) { /* no point re-calculating these every pass */ di=(float)((xl<0)?0:(int)xl)+0.5-(float)item->cols_out/2; byte_out=(item->rows_out-j-1)*byte_w_out; /* loop through meaningful columns */ for(i=((xl<0)?0:(int)xl); i<((xr>=item->cols_out)?item->cols_out:(int)xr); i++) { /* rotate coordinates */ it=(float)item->cols_in/2 + ( di*cos_angle + dj*sin_angle); jt=(float)item->rows_in/2 - (-di*sin_angle + dj*cos_angle); /* set pixel if required */ if(it>=0 && itcols_in && jt>=0 && jtrows_in) if((I_in->data[jt*byte_w_in+it/8] & 128>>(it%8))>0) item->ximage->data[byte_out+i/8]|=128>>i%8; di+=1; } dj+=1; xl+=xinc; xr+=xinc; } XDestroyImage(I_in); if(style.magnify!=1.) { item->cols_in=old_cols_in; item->rows_in=old_rows_in; } #ifdef CACHE_BITMAPS /* create a bitmap to hold rotated text */ item->bitmap=XCreatePixmap(dpy, DefaultRootWindow(dpy), item->cols_out, item->rows_out, 1); /* make the text bitmap from XImage */ XPutImage(dpy, item->bitmap, font_gc, item->ximage, 0, 0, 0, 0, item->cols_out, item->rows_out); XDestroyImage(item->ximage); #endif /*CACHE_BITMAPS*/ XFreeGC(dpy, font_gc); XFreePixmap(dpy, canvas); return item; } /* ---------------------------------------------------------------------- */ /**************************************************************************/ /* Adds a text item to the end of the cache, removing as many items */ /* from the front as required to keep cache size below limit */ /**************************************************************************/ static void XRotAddToLinkedList(dpy, item) Display *dpy; RotatedTextItem *item; { static long int current_size=0; static RotatedTextItem *last=NULL; RotatedTextItem *i1=first_text_item, *i2=NULL; #ifdef CACHE_BITMAPS /* I don't know how much memory a pixmap takes in the server - probably this + a bit more we can't account for */ item->size=((item->cols_out-1)/8+1)*item->rows_out; #else /* this is pretty much the size of a RotatedTextItem */ item->size=((item->cols_out-1)/8+1)*item->rows_out + sizeof(XImage) + strlen(item->text) + item->nl*8*sizeof(float) + sizeof(RotatedTextItem); if(item->font_name!=NULL) item->size+=strlen(item->font_name); else item->size+=sizeof(Font); #endif /*CACHE_BITMAPS */ /* count number of items in cache, for debugging */ if (appres.DEBUG) { int i=0; while(i1) { i++; i1=i1->next; } DEBUG_PRINT2("Cache has %d items.\n", i); i1=first_text_item; } DEBUG_PRINT4("current cache size=%ld, new item=%ld, limit=%ld\n", current_size, item->size, CACHE_SIZE_LIMIT*1024); /* if this item is bigger than whole cache, forget it */ if(item->size>CACHE_SIZE_LIMIT*1024) { DEBUG_PRINT1("Too big to cache\n\n"); item->cached=0; return; } /* remove elements from cache as needed */ while(i1 && current_size+item->size>CACHE_SIZE_LIMIT*1024) { DEBUG_PRINT2("Removed %d bytes\n", i1->size); if(i1->font_name!=NULL) DEBUG_PRINT5(" (`%s'\n %s\n angle=%f align=%d)\n", i1->text, i1->font_name, i1->angle, i1->align); #ifdef CACHE_FID if(i1->font_name==NULL) DEBUG_PRINT5(" (`%s'\n FID=%ld\n angle=%f align=%d)\n", i1->text, i1->fid, i1->angle, i1->align); #endif /*CACHE_FID*/ current_size-=i1->size; i2=i1->next; /* free resources used by the unlucky item */ XRotFreeTextItem(dpy, i1); /* remove it from linked list */ first_text_item=i2; i1=i2; } /* add new item to end of linked list */ if(first_text_item==NULL) { item->next=NULL; first_text_item=item; last=item; } else { item->next=NULL; last->next=item; last=item; } /* new cache size */ current_size+=item->size; item->cached=1; DEBUG_PRINT1("Added item to cache.\n"); } /* ---------------------------------------------------------------------- */ /**************************************************************************/ /* Free the resources used by a text item */ /**************************************************************************/ static void XRotFreeTextItem(dpy, item) Display *dpy; RotatedTextItem *item; { free(item->text); if(item->font_name!=NULL) free(item->font_name); free((char *)item->corners_x); free((char *)item->corners_y); #ifdef CACHE_BITMAPS XFreePixmap(dpy, item->bitmap); #else XDestroyImage(item->ximage); #endif /* CACHE_BITMAPS */ free((char *)item); } /* ---------------------------------------------------------------------- */ /**************************************************************************/ /* Magnify an XImage using bilinear interpolation */ /**************************************************************************/ static XImage *XRotMagnifyImage(dpy, ximage) Display *dpy; XImage *ximage; { int i, j; float x, y; float u,t; XImage *I_out; int cols_in, rows_in; int cols_out, rows_out; register int i2, j2; float z1, z2, z3, z4; int byte_width_in, byte_width_out; float mag_inv; /* size of input image */ cols_in=ximage->width; rows_in=ximage->height; /* size of final image */ cols_out=(float)cols_in*style.magnify; rows_out=(float)rows_in*style.magnify; /* this will hold final image */ I_out=MakeXImage(dpy, cols_out, rows_out); if(I_out==NULL) return NULL; /* width in bytes of input, output images */ byte_width_in=(cols_in-1)/8+1; byte_width_out=(cols_out-1)/8+1; /* for speed */ mag_inv=1./style.magnify; y=0.; /* loop over magnified image */ for(j2=0; j2data[j*byte_width_in+i/8] & 128>>(i%8))>0; z2=z1; z3=(ximage->data[(j+1)*byte_width_in+i/8] & 128>>(i%8))>0; z4=z3; } /* top edge */ else if(i!=cols_in-1 && j==rows_in-1) { t=x-(float)i; u=0; z1=(ximage->data[j*byte_width_in+i/8] & 128>>(i%8))>0; z2=(ximage->data[j*byte_width_in+(i+1)/8] & 128>>((i+1)%8))>0; z3=z2; z4=z1; } /* top right corner */ else if(i==cols_in-1 && j==rows_in-1) { u=0; t=0; z1=(ximage->data[j*byte_width_in+i/8] & 128>>(i%8))>0; z2=z1; z3=z1; z4=z1; } /* somewhere `safe' */ else { t=x-(float)i; u=y-(float)j; z1=(ximage->data[j*byte_width_in+i/8] & 128>>(i%8))>0; z2=(ximage->data[j*byte_width_in+(i+1)/8] & 128>>((i+1)%8))>0; z3=(ximage->data[(j+1)*byte_width_in+(i+1)/8] & 128>>((i+1)%8))>0; z4=(ximage->data[(j+1)*byte_width_in+i/8] & 128>>(i%8))>0; } /* if interpolated value is greater than 0.5, set bit */ if(((1-t)*(1-u)*z1 + t*(1-u)*z2 + t*u*z3 + (1-t)*u*z4)>0.5) I_out->data[j2*byte_width_out+i2/8]|=128>>i2%8; x+=mag_inv; } y+=mag_inv; } /* destroy original */ XDestroyImage(ximage); /* return big image */ return I_out; } /* ---------------------------------------------------------------------- */ /**************************************************************************/ /* Calculate the bounding box some text will have when painted */ /**************************************************************************/ XPoint *XRotTextExtents(font, angle, x, y, text, align) XFontStruct *font; float angle; int x, y; char *text; int align; { register int i; char *str1, *str2, *str3; char *str2_a="\0", *str2_b="\n\0"; int height; float sin_angle, cos_angle; int nl, max_width; int cols_in, rows_in; float hot_x, hot_y; XPoint *xp_in, *xp_out; int dir, asc, desc; XCharStruct overall; /* manipulate angle to 0<=angle<2*PI radians */ while(angle<0.0) angle+=M_2PI; while(angle>=M_2PI) angle-=M_2PI; /* count number of sections in string */ nl=1; if(align!=NONE) for(i=0; imax_width) max_width=overall.rbearing; } } while(str3!=NULL); free(str1); /* overall font height */ height=font->ascent+font->descent; /* dimensions horizontal text will have */ cols_in=max_width; rows_in=nl*height; /* pre-calculate sin and cos */ sin_angle=sin(angle); cos_angle=cos(angle); /* y position */ if(align==TLEFT || align==TCENTRE || align==TRIGHT) hot_y=(float)rows_in/2*style.magnify; else if(align==MLEFT || align==MCENTRE || align==MRIGHT) hot_y=0; else if(align==BLEFT || align==BCENTRE || align==BRIGHT) hot_y= -(float)rows_in/2*style.magnify; else hot_y= -((float)rows_in/2-(float)font->descent)*style.magnify; /* x position */ if(align==TLEFT || align==MLEFT || align==BLEFT || align==NONE) hot_x= -(float)max_width/2*style.magnify; else if(align==TCENTRE || align==MCENTRE || align==BCENTRE) hot_x=0; else hot_x=(float)max_width/2*style.magnify; /* reserve space for XPoints */ xp_in=(XPoint *)malloc((unsigned)(5*sizeof(XPoint))); if(!xp_in) return NULL; xp_out=(XPoint *)malloc((unsigned)(5*sizeof(XPoint))); if(!xp_out) return NULL; /* bounding box when horizontal, relative to bitmap centre */ xp_in[0].x= -(float)cols_in*style.magnify/2-style.bbx_pad; xp_in[0].y= (float)rows_in*style.magnify/2+style.bbx_pad; xp_in[1].x= (float)cols_in*style.magnify/2+style.bbx_pad; xp_in[1].y= (float)rows_in*style.magnify/2+style.bbx_pad; xp_in[2].x= (float)cols_in*style.magnify/2+style.bbx_pad; xp_in[2].y= -(float)rows_in*style.magnify/2-style.bbx_pad; xp_in[3].x= -(float)cols_in*style.magnify/2-style.bbx_pad; xp_in[3].y= -(float)rows_in*style.magnify/2-style.bbx_pad; xp_in[4].x=xp_in[0].x; xp_in[4].y=xp_in[0].y; /* rotate and translate bounding box */ for(i=0; i<5; i++) { xp_out[i].x=(float)x + ( ((float)xp_in[i].x-hot_x)*cos_angle + ((float)xp_in[i].y+hot_y)*sin_angle); xp_out[i].y=(float)y + (-((float)xp_in[i].x-hot_x)*sin_angle + ((float)xp_in[i].y+hot_y)*cos_angle); } free((char *)xp_in); return xp_out; }