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// rendertext.cpp: font rendering
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static hashtable<const char *, font> fonts;
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static font *fontdef = NULL;
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void newfont(char *name, char *tex, char *defaultw, char *defaulth, char *offsetx, char *offsety, char *offsetw, char *offseth)
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font *f = fonts.access(name);
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name = newstring(name);
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f->tex = textureload(tex);
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f->defaultw = ATOI(defaultw);
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f->defaulth = ATOI(defaulth);
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f->offsetx = ATOI(offsetx);
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f->offsety = ATOI(offsety);
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f->offsetw = ATOI(offsetw);
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f->offseth = ATOI(offseth);
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void fontchar(int x, int y, int w, int h)
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font::charinfo &c = fontdef->chars.add();
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c.w = w ? w : fontdef->defaultw;
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c.h = h ? h : fontdef->defaulth;
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COMMANDN(font, newfont, ARG_8STR);
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COMMANDN(fontchar, fontchar, ARG_4INT);
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bool setfont(const char *name)
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font *f = fonts.access(name);
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int text_width(const char *str)
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text_bounds(str, width, height);
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void draw_textf(const char *fstr, int left, int top, ...)
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s_sprintfdlv(str, top, fstr);
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draw_text(str, left, top);
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static int draw_char(int c, int x, int y)
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font::charinfo &info = curfont->chars[c-33];
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float tc_left = (info.x + curfont->offsetx) / float(curfont->tex->xs);
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float tc_top = (info.y + curfont->offsety) / float(curfont->tex->ys);
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float tc_right = (info.x + info.w + curfont->offsetw) / float(curfont->tex->xs);
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float tc_bottom = (info.y + info.h + curfont->offseth) / float(curfont->tex->ys);
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glTexCoord2f(tc_left, tc_top ); glVertex2f(x, y);
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glTexCoord2f(tc_right, tc_top ); glVertex2f(x + info.w, y);
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glTexCoord2f(tc_right, tc_bottom); glVertex2f(x + info.w, y + info.h);
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glTexCoord2f(tc_left, tc_bottom); glVertex2f(x, y + info.h);
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//stack[sp] is current color index
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static void text_color(char c, char *stack, int size, int &sp, bvec color, int a)
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if(c=='s') // save color
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if(sp<size-1) stack[++sp] = c;
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if(c=='r') c = stack[(sp > 0) ? --sp : sp]; // restore color
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case '0': color = bvec(64, 255, 128); break; // green: player talk
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case '1': color = bvec(96, 160, 255); break; // blue: team chat
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case '2': color = bvec(255, 192, 64); break; // yellow: gameplay action messages, only actions done by players
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case '3': color = bvec(255, 64, 64); break; // red: important errors and notes
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case '4': color = bvec(128, 128, 128); break; // gray
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case '5': color = bvec(255, 255, 255); break; // white
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case '6': color = bvec(96, 48, 0); break; // dark brown
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case '7': color = bvec(128, 48, 48); break; // dark red: dead admin
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// white (provided color): everything else
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glColor4ub(color.x, color.y, color.z, a);
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static vector<int> *columns = NULL;
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void text_startcolumns()
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if(!columns) columns = new vector<int>;
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void text_endcolumns()
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#define TABALIGN(x) ((((x)+PIXELTAB)/PIXELTAB)*PIXELTAB)
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#define TEXTGETCOLUMN \
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if(columns && col<columns->length()) \
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colx += (*columns)[col++]; \
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else x = TABALIGN(x);
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#define TEXTSETCOLUMN \
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while(col>=columns->length()) columns->add(0); \
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int w = TABALIGN(x) - colx; \
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w = max(w, (*columns)[col]); \
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(*columns)[col] = w; \
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else x = TABALIGN(x);
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#define TEXTSKELETON \
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int y = 0, x = 0, col = 0, colx = 0;\
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for(i = 0; str[i]; i++)\
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if(c=='\t') { TEXTTAB(i); TEXTWHITE(i) }\
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else if(c==' ') { x += curfont->defaultw; TEXTWHITE(i) }\
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else if(c=='\n') { TEXTLINE(i) x = 0; y += FONTH; }\
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else if(c=='\f') { if(str[i+1]) { i++; TEXTCOLOR(i) }}\
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else if(curfont->chars.inrange(c-33))\
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int w = curfont->chars[c-33].w;\
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for(; str[i+1]; i++)\
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if(c=='\f') { if(str[i+2]) i++; continue; }\
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if(!curfont->chars.inrange(c-33)) break;\
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int cw = curfont->chars[c-33].w + 1;\
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if(w + cw >= maxwidth) break;\
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if(x + w >= maxwidth && j!=0) { TEXTLINE(j-1) x = 0; y += FONTH; }\
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//all the chars are guaranteed to be either drawable or color commands
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#define TEXTWORDSKELETON \
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if(c=='\f') { if(str[j+1]) { j++; TEXTCOLOR(j) }}\
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else { TEXTCHAR(j) }\
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int text_visible(const char *str, int hitx, int hity, int maxwidth)
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#define TEXTINDEX(idx)
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#define TEXTTAB(idx) TEXTGETCOLUMN
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#define TEXTWHITE(idx) if(y+FONTH > hity && x >= hitx) return idx;
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#define TEXTLINE(idx) if(y+FONTH > hity) return idx;
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#define TEXTCOLOR(idx)
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#define TEXTCHAR(idx) x += curfont->chars[c-33].w+1; TEXTWHITE(idx)
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#define TEXTWORD TEXTWORDSKELETON
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//inverse of text_visible
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void text_pos(const char *str, int cursor, int &cx, int &cy, int maxwidth)
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#define TEXTINDEX(idx) if(idx == cursor) { cx = x; cy = y; break; }
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#define TEXTTAB(idx) TEXTGETCOLUMN
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#define TEXTWHITE(idx)
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#define TEXTLINE(idx)
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#define TEXTCOLOR(idx)
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#define TEXTCHAR(idx) x += curfont->chars[c-33].w + 1;
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#define TEXTWORD TEXTWORDSKELETON if(i >= cursor) break;
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if(cx == INT_MIN) { cx = x; cy = y; }
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void text_bounds(const char *str, int &width, int &height, int maxwidth)
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#define TEXTINDEX(idx)
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#define TEXTTAB(idx) TEXTSETCOLUMN
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#define TEXTWHITE(idx)
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#define TEXTLINE(idx) if(x > width) width = x;
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#define TEXTCOLOR(idx)
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#define TEXTCHAR(idx) x += curfont->chars[c-33].w + 1;
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#define TEXTWORD x += w + 1;
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void draw_text(const char *str, int left, int top, int r, int g, int b, int a, int cursor, int maxwidth)
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#define TEXTINDEX(idx) if(idx == cursor) { cx = x; cy = y; cc = str[idx]; }
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#define TEXTTAB(idx) TEXTGETCOLUMN
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#define TEXTWHITE(idx)
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#define TEXTLINE(idx)
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#define TEXTCOLOR(idx) text_color(str[idx], colorstack, sizeof(colorstack), colorpos, color, a);
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#define TEXTCHAR(idx) x += draw_char(c, left+x, top+y)+1;
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#define TEXTWORD TEXTWORDSKELETON
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int colorpos = 0, cx = INT_MIN, cy = 0, cc = ' ';
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colorstack[0] = 'c'; //indicate user color
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glBlendFunc(GL_SRC_ALPHA, curfont->tex->bpp==32 ? GL_ONE_MINUS_SRC_ALPHA : GL_ONE);
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glBindTexture(GL_TEXTURE_2D, curfont->tex->id);
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glColor4ub(color.x, color.y, color.z, a);
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if(cx == INT_MIN) { cx = x; cy = y; }
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if(maxwidth != -1 && cx >= maxwidth) { cx = 0; cy += FONTH; }
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int cw = curfont->chars.inrange(cc-33) ? curfont->chars[cc-33].w + 1 : curfont->defaultw;
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rendercursor(left+cx, top+cy, cw);
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enumerate(fonts, font, f,
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if(!reloadtexture(*f.tex)) fatal("failed to reload font texture");
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source/src/rendertext.cpp
