void ImageDrawing::strokeGlyph(Image* image, int x, int y, TrueTypeFont::Glyph* glyph, int size, const RGBA& color, ImageDrawing::AlphaCombineMode am) {
for(uint32_t j = 0; j < glyph->contours.contours.size(); j++) {
Contour contour = glyph->contours.contours[j];
vector<Vector2> coords = contour.coords;
coords.push_back(coords[0]);
coords.push_back(coords[1]);
vector<bool> onCurve = contour.onCurve;
onCurve.push_back(onCurve[0]);
onCurve.push_back(onCurve[1]);
Vector2 c0 = coords[0];
for(uint32_t k = 1; k < coords.size()-1; k++) {
Vector2 c1 = coords[k];
if (onCurve[k]) {
line_slow(image, c0[0]*size+x, y-c0[1]*size, c1[0]*size+x, y-c1[1]*size, color, am);
c0 = c1;
} else {
Vector2 c2 = coords[k+1];
if (!onCurve[k+1]) {
// Reconstruct a new c2 that is on curve
c2 = (c1 + c2) * 0.5;
}
quadraticBezierCurve(image, c0[0]*size+x, y-c0[1]*size, c1[0]*size+x, y-c1[1]*size, c2[0]*size+x, y-c2[1]*size, color, am);
c0 = c2;
}
}
}
}
void main()
{
int x1,y1,x2,y2,color;
float t1,t2;
word i,start;
srand(*my_clock); /* seed the number generator. */
set_mode(VGA_256_COLOR_MODE); /* set the video mode. */
start=*my_clock; /* record the starting time. */
for(i=0;i<5000;i++) /* randomly draw 5000 lines. */
{
x1=rand()%SCREEN_WIDTH;
y1=rand()%SCREEN_HEIGHT;
x2=rand()%SCREEN_WIDTH;
y2=rand()%SCREEN_HEIGHT;
color=rand()%NUM_COLORS;
line_slow(x1,y1,x2,y2,color);
}
t1=(*my_clock-start)/18.2; /* calculate how long it took. */
set_mode(VGA_256_COLOR_MODE); /* set the video mode again in order
to clear the screen. */
start=*my_clock; /* record the starting time. */
for(i=0;i<5000;i++) /* randomly draw 5000 lines. */
{
x1=rand()%SCREEN_WIDTH;
y1=rand()%SCREEN_HEIGHT;
x2=rand()%SCREEN_WIDTH;
y2=rand()%SCREEN_HEIGHT;
color=rand()%NUM_COLORS;
line_fast(x1,y1,x2,y2,color);
}
t2=(*my_clock-start)/18.2; /* calculate how long it took. */
set_mode(TEXT_MODE); /* set the video mode back to
text mode. */
/* output the results... */
printf("Slow line drawing took %f seconds.\n",t1);
printf("Fast line drawing took %f seconds.\n",t2);
if (t2 != 0) printf("Fast line drawing was %f times faster.\n",t1/t2);
return;
}