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dynamic rendering of utf8 characters such as umlauts by using ttf (wip)

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git-svn-id: svn://svn.code.sf.net/p/actiongame/code/trunk/ac@4769 e016b1c5-ed68-44aa-a2f7-31cac88cffde
This commit is contained in:
driAn
2010-01-14 22:19:27 +00:00
parent 2a27edf8a3
commit e232a3f3ac
9 changed files with 556 additions and 39 deletions
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source/src/rendertext.cpp
+410 -15
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@@ -32,6 +32,8 @@ void newfont(char *name, char *tex, char *defaultw, char *defaulth, char *offset
fontdef = f;
}
extern GLenum texformat(int bpp);
void fontchar(int x, int y, int w, int h)
{
if(!fontdef) return;
@@ -93,23 +95,203 @@ void draw_textf(const char *fstr, int left, int top, ...)
draw_text(str, left, top);
}
extern int shdsize, outline, win32msg;
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
#define RMASK 0xff000000
#define GMASK 0x00ff0000
#define BMASK 0x0000ff00
#define AMASK 0x000000ff
#else
#define RMASK 0x000000ff
#define GMASK 0x0000ff00
#define BMASK 0x00ff0000
#define AMASK 0xff000000
#endif
// ringbuf for utf8 character storage
struct charringbuf : ringbuf<font::utf8charinfo, 32>
{
// find by character code
int findbycharcode(int code)
{
loopi(len)
{
if(data[i].code == code)
return i;
}
return -1;
}
};
TTF_Font *ttffont = NULL;
font utf8font;
charringbuf utf8chars;
void initfont()
{
static bool initialized = false;
if(!initialized)
{
TTF_Init();
int fsize = 64;
char *fonname = "packages\\misc\\font.ttf";
ttffont = TTF_OpenFont(findfile(fonname, "r"), fsize);
utf8font.defaulth = 0;
utf8font.defaultw = 0;
utf8font.offsetw = 0;
utf8font.offseth = 10;
utf8font.offsetx = 0;
utf8font.offsety = 0;
initialized = true;
}
}
void createutf8charset()
{
int isize = 512;
SDL_Surface *charsetsurface = SDL_CreateRGBSurface(SDL_SWSURFACE, isize, isize, 32, RMASK, GMASK, BMASK, AMASK);
if(charsetsurface)
{
SDL_Color color;
color.r = 255;
color.g = 255;
color.b = 255;
int posx = 0;
int posy = 0;
loopv(utf8chars)
{
font::utf8charinfo &charinfo = utf8chars[i];
int code = charinfo.code;
char u[5] = {0,0,0,0,0};
utf8::append(code, u);
SDL_Surface *fontsurface = TTF_RenderUTF8_Blended(ttffont, u, color);
// update row/column info
if(posx + fontsurface->w > charsetsurface->w)
{
posx = 0;
posy += fontsurface->h; // fixme
}
if(posy + fontsurface->h > charsetsurface->h)
break;
// blit onto charset
SDL_SetAlpha(fontsurface, 0, 0);
blitsurface(charsetsurface, fontsurface, posx, posy);
// update charinfo properties
charinfo.x = posx;
charinfo.y = posy;
charinfo.w = fontsurface->w;
charinfo.h = fontsurface->h;
posx += fontsurface->w;
SDL_FreeSurface(fontsurface);
}
utf8font.tex = createtexturefromsurface("utf8charset", charsetsurface);
//extern void savepng(SDL_Surface *s, const char *name);
//savepng(t, "font.png");
SDL_FreeSurface(charsetsurface);
}
}
void addutf8char(int code)
{
// add to buf
font::utf8charinfo charinfo;
charinfo.code = code;
utf8chars.add(charinfo);
// update charset
createutf8charset();
}
font::charinfo *loadchar(int code)
{
int idx = utf8chars.findbycharcode(code);
if(idx >= 0)
return &utf8chars[idx];
// add
addutf8char(code);
idx = utf8chars.findbycharcode(code);
return &utf8chars[idx];
}
int draw_char(font &f, font::charinfo &info, int charcode, int x, int y)
{
// fixme
glEnd();
glBindTexture(GL_TEXTURE_2D, f.tex->id);
glBegin(GL_QUADS);
float tc_left = (info.x + f.offsetx) / float(f.tex->xs);
float tc_top = (info.y + f.offsety) / float(f.tex->ys);
float tc_right = (info.x + info.w + f.offsetw) / float(f.tex->xs);
float tc_bottom = (info.y + info.h + f.offseth) / float(f.tex->ys);
glTexCoord2f(tc_left, tc_top ); glVertex2f(x, y);
glTexCoord2f(tc_right, tc_top ); glVertex2f(x + info.w, y);
glTexCoord2f(tc_right, tc_bottom); glVertex2f(x + info.w, y + info.h);
glTexCoord2f(tc_left, tc_bottom); glVertex2f(x, y + info.h);
xtraverts += 4;
return info.w;
}
// fixme
font::charinfo &getcharinfo(int c)
{
if(curfont->chars.inrange(c-curfont->skip))
{
font::charinfo &info = curfont->chars[c-curfont->skip];
return info;
}
else
{
font::charinfo &info = *loadchar(c);
return info;
}
}
static int draw_char(int c, int x, int y)
{
font::charinfo &info = curfont->chars[c-curfont->skip];
float tc_left = (info.x + curfont->offsetx) / float(curfont->tex->xs);
float tc_top = (info.y + curfont->offsety) / float(curfont->tex->ys);
float tc_right = (info.x + info.w + curfont->offsetw) / float(curfont->tex->xs);
float tc_bottom = (info.y + info.h + curfont->offseth) / float(curfont->tex->ys);
if(curfont->chars.inrange(c-curfont->skip))
{
font::charinfo &info = curfont->chars[c-curfont->skip];
glTexCoord2f(tc_left, tc_top ); glVertex2f(x, y);
glTexCoord2f(tc_right, tc_top ); glVertex2f(x + info.w, y);
glTexCoord2f(tc_right, tc_bottom); glVertex2f(x + info.w, y + info.h);
glTexCoord2f(tc_left, tc_bottom); glVertex2f(x, y + info.h);
return draw_char(*curfont, info, c, x, y);
}
else
{
// fixme
glEnd();
font::charinfo &info = *loadchar(c);
glBegin(GL_QUADS);
xtraverts += 4;
return info.w;
return draw_char(utf8font, info, c, x, y);
}
}
//stack[sp] is current color index
static void text_color(char c, char *stack, int size, int &sp, bvec color, int a)
{
@@ -297,15 +479,228 @@ void draw_text(const char *str, int left, int top, int r, int g, int b, int a, i
#define TEXTCOLOR(idx) text_color(str[idx], colorstack, sizeof(colorstack), colorpos, color, a);
#define TEXTCHAR(idx) x += draw_char(c, left+x, top+y)+1;
#define TEXTWORD TEXTWORDSKELETON
char colorstack[10];
bvec color(r, g, b);
int colorpos = 0, cx = INT_MIN, cy = 0, cc = ' ';
colorstack[0] = 'c'; //indicate user color
glBlendFunc(GL_SRC_ALPHA, curfont->tex->bpp==32 ? GL_ONE_MINUS_SRC_ALPHA : GL_ONE);
glBindTexture(GL_TEXTURE_2D, curfont->tex->id);
glBlendFunc(GL_SRC_ALPHA, curfont->tex->bpp==32 ? GL_ONE_MINUS_SRC_ALPHA : GL_ONE);
glBindTexture(GL_TEXTURE_2D, curfont->tex->id);
glBegin(GL_QUADS);
glColor4ub(color.x, color.y, color.z, a);
TEXTSKELETON
std::string text(str);
std::string::iterator begin = text.begin();
std::string::iterator end = text.end();
std::string::iterator cursoriter = end;
if(cursor >= 0 && cursor < utf8::distance(begin, end))
{
cursoriter = begin;
utf8::advance(cursoriter, cursor, end);
}
/* WIP ALERT */
int y = 0, x = 0, col = 0, colx = 0;
for(std::string::iterator iter = text.begin(); iter != text.end(); utf8::next(iter, text.end()))
{
//TEXTINDEX(i)
//if(idx == cursor) { cx = x; cy = y; cc = str[idx]; }
int c = utf8::peek_next(iter, text.end());
//int c = str[i];
if(iter == cursoriter)
{
cx = x;
cy = y;
cc = c;
}
if(c=='\t')
{
//TEXTTAB(i);
if(columns && col<columns->length())
{
colx += (*columns)[col++];
x = colx;
}
else x = TABALIGN(x);
//TEXTWHITE(i)
}
else if(c==' ')
{
x += curfont->defaultw;
//TEXTWHITE(i)
}
else if(c=='\n')
{
//TEXTLINE(i)
x = 0;
y += FONTH;
}
else if(c=='\f')
{
/*
if(str[i+1])
{
i++;
//TEXTCOLOR(i)
text_color(str[i], colorstack, sizeof(colorstack), colorpos, color, a);
}
*/
std::string::iterator test = iter;
test++;
if(test != end)
{
//TEXTCOLOR(i)
c = utf8::next(iter, end);
text_color(c, colorstack, sizeof(colorstack), colorpos, color, a);
}
}
else if(c=='\a')
{
/*
if(str[i+1])
{
i++;
}
*/
std::string::iterator next = iter;
next++;
if(next != end)
{
iter++;
}
}
else if(curfont->chars.inrange(c-curfont->skip))
{
font::charinfo &cinfo = getcharinfo(c);
if(maxwidth != -1)
{
/* ORIGINAL, UNWRAPPED CPP TEMPLATES
int j = i;
int w = cinfo.w; //curfont->chars[c-curfont->skip].w;
for(; str[i+1]; i++)
{
int c = str[i+1];
if(c=='\f') { if(str[i+2]) i++; continue; }
if(i-j > 16) break;
if(!curfont->chars.inrange(c-curfont->skip)) break;
int cw = curfont->chars[c-curfont->skip].w + 1;
if(w + cw >= maxwidth) break;
w += cw;
}
if(x + w >= maxwidth && j!=0)
{
//TEXTLINE(j-1)
x = 0; y += FONTH;
}
//TEXTWORD
for(; j <= i; j++)
{
//TEXTINDEX(j)
if(j == cursor) { cx = x; cy = y; cc = str[j]; }
int c = str[j];
if(c=='\f')
{
if(str[j+1])
{
j++;
//TEXTCOLOR(j)
text_color(str[j], colorstack, sizeof(colorstack), colorpos, color, a);
}
}
else
{
//TEXTCHAR(j)
x += draw_char(c, left+x, top+y)+1;
}
}
*/
std::string::iterator next = iter;
int w = cinfo.w; //curfont->chars[c-curfont->skip].w;
do
{
std::string::iterator test = iter;
int c = utf8::next(test, end);
if(test == end) break;
if(c=='\f')
{
std::string::iterator test = iter;
utf8::advance(test, 2, end);
if(test != end)
{
utf8::next(iter, end);
}
continue;
}
if(utf8::distance(iter, next) > 16) break;
//if(!curfont->chars.inrange(c-curfont->skip)) fixme
if(c < curfont->skip) // fixme
{
break;
}
int cw = getcharinfo(c).w + 1;
if(w + cw >= maxwidth) break;
w += cw;
utf8::next(iter, end);
} while(true);
if(x + w >= maxwidth && next != begin) //fixme
{
x = 0;
y += FONTH;
}
for(; next <= iter && next != end; )
{
int test = utf8::distance(next, iter);
int c = utf8::peek_next(next, end);
if(next == cursoriter) { cx = x; cy = y; cc = c; }
if(c=='\f')
{
std::string::iterator test = next;
utf8::next(test, end);
if(test != end)
{
c = utf8::next(next, end);
text_color(c, colorstack, sizeof(colorstack), colorpos, color, a);
}
}
else
{
x += draw_char(c, left+x, top+y)+1;
}
utf8::next(next, end);
}
}
else
{
x += draw_char(c, left+x, top+y)+1;
}
}
}
glEnd();
if(cursor >= 0)
{
@@ -314,6 +709,7 @@ void draw_text(const char *str, int left, int top, int r, int g, int b, int a, i
int cw = curfont->chars.inrange(cc-curfont->skip) ? curfont->chars[cc-curfont->skip].w + 1 : curfont->defaultw;
rendercursor(left+cx, top+cy, cw);
}
#undef TEXTINDEX
#undef TEXTTAB
#undef TEXTWHITE
@@ -329,4 +725,3 @@ void reloadfonts()
if(!reloadtexture(*f.tex)) fatal("failed to reload font texture");
);
}