void
fz_insert_gel(fz_gel *gel, float fx0, float fy0, float fx1, float fy1)
{
int x0, y0, x1, y1;
int d, v;
fx0 = floorf(fx0 * FZ_AA_HSCALE(gel->ctx));
fx1 = floorf(fx1 * FZ_AA_HSCALE(gel->ctx));
fy0 = floorf(fy0 * FZ_AA_VSCALE(gel->ctx));
fy1 = floorf(fy1 * FZ_AA_VSCALE(gel->ctx));
/* cf. http://code.google.com/p/sumatrapdf/issues/detail?id=1741 */
x0 = CLAMP(fx0, BBOX_MIN * FZ_AA_HSCALE(gel->ctx), BBOX_MAX * FZ_AA_HSCALE(gel->ctx));
y0 = CLAMP(fy0, BBOX_MIN * FZ_AA_VSCALE(gel->ctx), BBOX_MAX * FZ_AA_VSCALE(gel->ctx));
x1 = CLAMP(fx1, BBOX_MIN * FZ_AA_HSCALE(gel->ctx), BBOX_MAX * FZ_AA_HSCALE(gel->ctx));
y1 = CLAMP(fy1, BBOX_MIN * FZ_AA_VSCALE(gel->ctx), BBOX_MAX * FZ_AA_VSCALE(gel->ctx));
d = clip_lerp_y(gel->clip.y0, 0, x0, y0, x1, y1, &v);
if (d == OUTSIDE) return;
if (d == LEAVE) { y1 = gel->clip.y0; x1 = v; }
if (d == ENTER) { y0 = gel->clip.y0; x0 = v; }
d = clip_lerp_y(gel->clip.y1, 1, x0, y0, x1, y1, &v);
if (d == OUTSIDE) return;
if (d == LEAVE) { y1 = gel->clip.y1; x1 = v; }
if (d == ENTER) { y0 = gel->clip.y1; x0 = v; }
d = clip_lerp_x(gel->clip.x0, 0, x0, y0, x1, y1, &v);
if (d == OUTSIDE) {
x0 = x1 = gel->clip.x0;
}
if (d == LEAVE) {
fz_insert_gel_raw(gel, gel->clip.x0, v, gel->clip.x0, y1);
x1 = gel->clip.x0;
y1 = v;
}
if (d == ENTER) {
fz_insert_gel_raw(gel, gel->clip.x0, y0, gel->clip.x0, v);
x0 = gel->clip.x0;
y0 = v;
}
d = clip_lerp_x(gel->clip.x1, 1, x0, y0, x1, y1, &v);
if (d == OUTSIDE) {
x0 = x1 = gel->clip.x1;
}
if (d == LEAVE) {
fz_insert_gel_raw(gel, gel->clip.x1, v, gel->clip.x1, y1);
x1 = gel->clip.x1;
y1 = v;
}
if (d == ENTER) {
fz_insert_gel_raw(gel, gel->clip.x1, y0, gel->clip.x1, v);
x0 = gel->clip.x1;
y0 = v;
}
fz_insert_gel_raw(gel, x0, y0, x1, y1);
}
void
fz_insert_gel_rect(fz_context *ctx, fz_gel *gel, float fx0, float fy0, float fx1, float fy1)
{
int x0, y0, x1, y1;
const int hscale = fz_aa_hscale;
const int vscale = fz_aa_vscale;
if (fx0 <= fx1)
{
fx0 = floorf(fx0 * hscale);
fx1 = ceilf(fx1 * hscale);
}
else
{
fx0 = ceilf(fx0 * hscale);
fx1 = floorf(fx1 * hscale);
}
if (fy0 <= fy1)
{
fy0 = floorf(fy0 * vscale);
fy1 = ceilf(fy1 * vscale);
}
else
{
fy0 = ceilf(fy0 * vscale);
fy1 = floorf(fy1 * vscale);
}
fx0 = fz_clamp(fx0, gel->clip.x0, gel->clip.x1);
fx1 = fz_clamp(fx1, gel->clip.x0, gel->clip.x1);
fy0 = fz_clamp(fy0, gel->clip.y0, gel->clip.y1);
fy1 = fz_clamp(fy1, gel->clip.y0, gel->clip.y1);
/* Call fz_clamp so that clamping is done in the float domain, THEN
* cast down to an int. Calling fz_clampi causes problems due to the
* implicit cast down from float to int of the first argument
* over/underflowing and flipping sign at extreme values. */
x0 = (int)fz_clamp(fx0, BBOX_MIN * hscale, BBOX_MAX * hscale);
y0 = (int)fz_clamp(fy0, BBOX_MIN * vscale, BBOX_MAX * vscale);
x1 = (int)fz_clamp(fx1, BBOX_MIN * hscale, BBOX_MAX * hscale);
y1 = (int)fz_clamp(fy1, BBOX_MIN * vscale, BBOX_MAX * vscale);
fz_insert_gel_raw(ctx, gel, x1, y0, x1, y1);
fz_insert_gel_raw(ctx, gel, x0, y1, x0, y0);
}
void
fz_insert_gel(fz_context *ctx, fz_gel *gel, float fx0, float fy0, float fx1, float fy1)
{
int x0, y0, x1, y1;
int d, v;
const int hscale = fz_aa_hscale;
const int vscale = fz_aa_vscale;
fx0 = floorf(fx0 * hscale);
fx1 = floorf(fx1 * hscale);
fy0 = floorf(fy0 * vscale);
fy1 = floorf(fy1 * vscale);
/* Call fz_clamp so that clamping is done in the float domain, THEN
* cast down to an int. Calling fz_clampi causes problems due to the
* implicit cast down from float to int of the first argument
* over/underflowing and flipping sign at extreme values. */
x0 = (int)fz_clamp(fx0, BBOX_MIN * hscale, BBOX_MAX * hscale);
y0 = (int)fz_clamp(fy0, BBOX_MIN * vscale, BBOX_MAX * vscale);
x1 = (int)fz_clamp(fx1, BBOX_MIN * hscale, BBOX_MAX * hscale);
y1 = (int)fz_clamp(fy1, BBOX_MIN * vscale, BBOX_MAX * vscale);
d = clip_lerp_y(gel->clip.y0, 0, x0, y0, x1, y1, &v);
if (d == OUTSIDE) return;
if (d == LEAVE) { y1 = gel->clip.y0; x1 = v; }
if (d == ENTER) { y0 = gel->clip.y0; x0 = v; }
d = clip_lerp_y(gel->clip.y1, 1, x0, y0, x1, y1, &v);
if (d == OUTSIDE) return;
if (d == LEAVE) { y1 = gel->clip.y1; x1 = v; }
if (d == ENTER) { y0 = gel->clip.y1; x0 = v; }
d = clip_lerp_x(gel->clip.x0, 0, x0, y0, x1, y1, &v);
if (d == OUTSIDE) {
x0 = x1 = gel->clip.x0;
}
if (d == LEAVE) {
fz_insert_gel_raw(ctx, gel, gel->clip.x0, v, gel->clip.x0, y1);
x1 = gel->clip.x0;
y1 = v;
}
if (d == ENTER) {
fz_insert_gel_raw(ctx, gel, gel->clip.x0, y0, gel->clip.x0, v);
x0 = gel->clip.x0;
y0 = v;
}
d = clip_lerp_x(gel->clip.x1, 1, x0, y0, x1, y1, &v);
if (d == OUTSIDE) {
x0 = x1 = gel->clip.x1;
}
if (d == LEAVE) {
fz_insert_gel_raw(ctx, gel, gel->clip.x1, v, gel->clip.x1, y1);
x1 = gel->clip.x1;
y1 = v;
}
if (d == ENTER) {
fz_insert_gel_raw(ctx, gel, gel->clip.x1, y0, gel->clip.x1, v);
x0 = gel->clip.x1;
y0 = v;
}
fz_insert_gel_raw(ctx, gel, x0, y0, x1, y1);
}
