// RenderTo32Bit renders a string using the bitmapped font to a non-antialised
// string to a 32-bit buffer with the given color. It returns the width of the
// string.
func (s *Font) RenderTo32Bit(
str string, col color.Color, x, y int, target gfx.Surface32Bit) (xAdvance float64) {
col32 := target.MapColor(col)
for _, ch := range str {
if !s.valid(ch) {
continue
}
g := s.glyphs[int(ch)-s.startChar]
s.render32BitChar(ch, col32, x+int(xAdvance), y, target)
xAdvance += float64(g.xAdvance)
}
return
}
func (s *Font) render32BitChar(
ch rune, color uint32, x, y int, target gfx.Surface32Bit) {
if !s.valid(ch) {
return
}
g := s.glyphs[int(ch)-s.startChar]
x += int(g.xOff)
y += int(g.yOff)
tPix := target.Pixels32()
tRect := target.Bounds()
for gy := 0; gy <= int(g.y1-g.y0); gy++ {
tPos := x + (y+gy)*target.Pitch32()
gPos := (gy+int(g.y0))*s.Pitch() + int(g.x0)
for gx := 0; gx <= int(g.x1-g.x0); gx++ {
if s.pixels[gPos+gx] >= 0x80 && image.Pt(x+gx, y+gy).In(tRect) {
tPix[tPos+gx] = color
}
}
}
}