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Allow to use non-standard fonts with the PostScript backend: in that case all characters 

are reproduced using a bitmap.
Fixed the bitmap-based text output for the X11-no-Xft case.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@8411 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Manolo Gouy 2011-02-10 18:41:12 +00:00
parent e84d65fd33
commit d36013aed9
1 changed files with 26 additions and 8 deletions
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30
src/Fl_PostScript.cxx
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@ -926,10 +926,10 @@ static const char *_fontNames[] = {
};
void Fl_PostScript_Graphics_Driver::font(int f, int s) {
if (f >= FL_FREE_FONT)
f = FL_COURIER;
if (f < FL_FREE_FONT) {
fprintf(output, "/%s SF\n" , _fontNames[f]);
fprintf(output,"%i FS\n", s);
}
Fl_Display_Device::display_device()->driver()->font(f,s); // Use display fonts for font measurement
Fl_Graphics_Driver::font(f, s);
}
@ -994,11 +994,16 @@ static uchar *calc_mask(uchar *img, int w, int h, Fl_Color bg)
// write to PostScript a bitmap image of a UTF8 string
static void transformed_draw_extra(const char* str, int n, double x, double y, int w, FILE *output) {
const float scale = 3; // scale for bitmask computation
// scale for bitmask computation
#if defined(USE_X11) && !USE_XFT
const float scale = 1; // don't scale because we can't expect to have scalable fonts
#else
const float scale = 3;
#endif
Fl_Fontsize old_size = fl_size();
fl_font(fl_font(), (Fl_Fontsize)(scale * old_size) );
Fl_Font fontnum = fl_font();
w = (int)(w *scale + 0.5);
int h = fl_height();
int h = (int)(fl_height() * scale);
// create an offscreen image of the string
Fl_Color text_color = fl_color();
Fl_Color bg_color = fl_contrast(FL_WHITE, text_color);
@ -1008,11 +1013,20 @@ static void transformed_draw_extra(const char* str, int n, double x, double y, i
// color offscreen background with a shade contrasting with the text color
fl_rectf(0, 0, w+2, (int)(h+3*scale) );
fl_color(text_color);
#if defined(USE_X11) && !USE_XFT
// force seeing this font as new so it's applied to the offscreen graphics context
fl_graphics_driver->font_descriptor(NULL);
fl_graphics_driver->Fl_Graphics_Driver::font(fontnum, 0);
#endif
fl_font(fontnum, (Fl_Fontsize)(scale * old_size) );
fl_draw(str, n, 1, (int)(h * 0.8) ); // draw string in offscreen
#ifdef WIN32
fl_font(0, FL_NORMAL_SIZE); // TODO: find something better
#endif
// read (most of) the offscreen image
uchar *img = fl_read_image(NULL, 1, 1, w, h, 0);
fl_end_offscreen();
fl_font(fl_font(), old_size);
fl_font(fontnum, old_size);
fl_delete_offscreen(off);
// compute the mask of what is not the background
uchar *mask = calc_mask(img, w, h, bg_color);
@ -1063,6 +1077,10 @@ void Fl_PostScript_Graphics_Driver::transformed_draw(const char* str, int n, dou
// compute display width of string
int width = (int)fl_width(str, n);
if (width == 0) return;
if (fl_font() >= FL_FREE_FONT) {
transformed_draw_extra(str, n, x, y, width, output);
return;
}
fprintf(output, "%d <", width);
// transforms UTF8 encoding to our custom PostScript encoding as follows:
// extract each unicode character