void
WriteGlyphAsTGA(FT_Library &library,
const std::string &fileName,
wchar_t ch,
FT_Face &face,
int size,
const Pixel32 &fontCol,
const Pixel32 outlineCol,
float outlineWidth)
{
// Set the size to use.
if (FT_Set_Char_Size(face, size << 6, size << 6, 90, 90) == 0)
{
// Load the glyph we are looking for.
FT_UInt gindex = FT_Get_Char_Index(face, ch);
if (FT_Load_Glyph(face, gindex, FT_LOAD_NO_BITMAP) == 0)
{
// Need an outline for this to work.
if (face->glyph->format == FT_GLYPH_FORMAT_OUTLINE)
{
// Render the basic glyph to a span list.
Spans spans;
RenderSpans(library, &face->glyph->outline, &spans);
// Next we need the spans for the outline.
Spans outlineSpans;
// Set up a stroker.
FT_Stroker stroker;
FT_Stroker_New(library, &stroker);
FT_Stroker_Set(stroker,
(int)(outlineWidth * 64),
FT_STROKER_LINECAP_ROUND,
FT_STROKER_LINEJOIN_ROUND,
0);
FT_Glyph glyph;
if (FT_Get_Glyph(face->glyph, &glyph) == 0)
{
FT_Glyph_StrokeBorder(&glyph, stroker, 0, 1);
// Again, this needs to be an outline to work.
if (glyph->format == FT_GLYPH_FORMAT_OUTLINE)
{
// Render the outline spans to the span list
FT_Outline *o =
&reinterpret_cast<FT_OutlineGlyph>(glyph)->outline;
RenderSpans(library, o, &outlineSpans);
}
// Clean up afterwards.
FT_Stroker_Done(stroker);
FT_Done_Glyph(glyph);
// Now we need to put it all together.
if (!spans.empty())
{
// Figure out what the bounding rect is for both the span lists.
Rect rect(spans.front().x,
spans.front().y,
spans.front().x,
spans.front().y);
for (Spans::iterator s = spans.begin();
s != spans.end(); ++s)
{
rect.Include(Vec2(s->x, s->y));
rect.Include(Vec2(s->x + s->width - 1, s->y));
}
for (Spans::iterator s = outlineSpans.begin();
s != outlineSpans.end(); ++s)
{
rect.Include(Vec2(s->x, s->y));
rect.Include(Vec2(s->x + s->width - 1, s->y));
}
#if 0
// This is unused in this test but you would need this to draw
// more than one glyph.
float bearingX = face->glyph->metrics.horiBearingX >> 6;
float bearingY = face->glyph->metrics.horiBearingY >> 6;
float advance = face->glyph->advance.x >> 6;
#endif
// Get some metrics of our image.
int imgWidth = rect.Width(),
imgHeight = rect.Height(),
imgSize = imgWidth * imgHeight;
// Allocate data for our image and clear it out to transparent.
Pixel32 *pxl = new Pixel32[imgSize];
memset(pxl, 0, sizeof(Pixel32) * imgSize);
// Loop over the outline spans and just draw them into the
// image.
for (Spans::iterator s = outlineSpans.begin();
s != outlineSpans.end(); ++s)
for (int w = 0; w < s->width; ++w)
pxl[(int)((imgHeight - 1 - (s->y - rect.ymin)) * imgWidth
+ s->x - rect.xmin + w)] =
Pixel32(outlineCol.r, outlineCol.g, outlineCol.b,
s->coverage);
// Then loop over the regular glyph spans and blend them into
// the image.
for (Spans::iterator s = spans.begin();
s != spans.end(); ++s)
for (int w = 0; w < s->width; ++w)
{
Pixel32 &dst =
pxl[(int)((imgHeight - 1 - (s->y - rect.ymin)) * imgWidth
+ s->x - rect.xmin + w)];
Pixel32 src = Pixel32(fontCol.r, fontCol.g, fontCol.b,
s->coverage);
dst.r = (int)(dst.r + ((src.r - dst.r) * src.a) / 255.0f);
dst.g = (int)(dst.g + ((src.g - dst.g) * src.a) / 255.0f);
dst.b = (int)(dst.b + ((src.b - dst.b) * src.a) / 255.0f);
dst.a = MIN(255, dst.a + src.a);
}
// Dump the image to disk.
WriteTGA(fileName, pxl, imgWidth, imgHeight);
delete [] pxl;
}
}
void fetchPrev(SpanItr &s){
if(s-- == spans.begin()) {
uint64_t prvInterval=prevInterval(s->first, timeUnit);
s=spans.insert(std::pair<int64_t,spanView*>(prvInterval, new spanView(this, prvInterval, s->first))).first;
}
};