int main( ) {
static char svg_buf[MAX_SVG];
ssize_t read_ret;
size_t read_pos = 0;
/* slurp input */
while (read_pos < MAX_SVG) {
read_ret = read(STDIN_FILENO, svg_buf + read_pos, MAX_SVG - read_pos);
if (read_ret < 0) {
perror("read");
exit(1);
} else if (read_ret == 0) {
break;
} else {
read_pos += read_ret;
}
}
/* create SVG frame */
RawFrame *svg = RsvgFrame::render_svg(svg_buf, read_pos);
/* dump raw BGRAn8 video to stdout */
fprintf(stderr, "w=%d h=%d\n", svg->w( ), svg->h( ));
svg->write_to_fd(STDOUT_FILENO);
}
RawFrame *FreetypeFont::render_string(const char *string) {
int x;
RawFrame *ret;
FT_GlyphSlot slot = face->glyph;
FT_Bool use_kerning = FT_HAS_KERNING(face);
FT_UInt glyph_index, previous;
uint8_t *glyph_scanline;
x = 0;
previous = 0;
/* first compute the size of the resulting image */
const char *scan_ptr = string;
while (*scan_ptr != '\0') {
glyph_index = FT_Get_Char_Index(face, *scan_ptr);
scan_ptr++;
if (use_kerning && previous != 0 && glyph_index != 0) {
FT_Vector delta;
FT_Get_Kerning(face, previous, glyph_index,
FT_KERNING_DEFAULT, &delta);
x += delta.x / 64;
}
FTCHK(FT_Load_Glyph(face, glyph_index, FT_LOAD_DEFAULT));
x += slot->advance.x / 64;
previous = glyph_index;
}
/* initialize a raw frame */
ret = new RawFrame(x, _h, RawFrame::BGRAn8);
/* second pass: draw it */
scan_ptr = string;
int xd = 0;
previous = 0;
uint8_t *dest_scanline = ret->data( );
for (unsigned int i = 0; i < ret->size( ); i += 4) {
dest_scanline[i] = bb;
dest_scanline[i+1] = gb;
dest_scanline[i+2] = rb;
dest_scanline[i+3] = ab;
}
while (*scan_ptr != '\0') {
glyph_index = FT_Get_Char_Index(face, *scan_ptr);
scan_ptr++;
if (use_kerning && previous != 0 && glyph_index != 0) {
FT_Vector delta;
FT_Get_Kerning(face, previous, glyph_index,
FT_KERNING_DEFAULT, &delta);
xd += delta.x / 64;
}
FTCHK(FT_Load_Glyph(face, glyph_index, FT_LOAD_RENDER));
//int yd = -(slot->bitmap_top);
int yd = _baseline - slot->bitmap_top;
for (unsigned int y = 0; y < slot->bitmap.rows && yd < _h; y++, yd++) {
if (yd >= 0) {
glyph_scanline = ((uint8_t *)slot->bitmap.buffer)
+ slot->bitmap.pitch * y;
dest_scanline = ret->scanline(yd) + 4*xd;
int xd2 = xd;
for (unsigned int x = 0; x < slot->bitmap.width && xd2 < ret->w( );
x++, xd2++) {
dest_scanline[0] = (bf * glyph_scanline[x]
+ bb * (255 - glyph_scanline[x])) / 255;
dest_scanline[1] = (gf * glyph_scanline[x]
+ gb * (255 - glyph_scanline[x])) / 255;
dest_scanline[2] = (rf * glyph_scanline[x]
+ rb * (255 - glyph_scanline[x])) / 255;
dest_scanline[3] = (af * glyph_scanline[x]
+ ab * (255 - glyph_scanline[x])) / 255;
dest_scanline += 4;
}
}
}
xd += slot->advance.x / 64;
previous = glyph_index;
}
return ret;
}