/* Special case code for gray -> rgb */
static inline void
fz_paint_affine_alpha_g2rgb_lerp(byte *dp, byte *sp, int sw, int sh, int u, int v, int fa, int fb, int w, int alpha, byte *hp)
{
while (w--)
{
int ui = u >> 16;
int vi = v >> 16;
if (ui >= 0 && ui < sw && vi >= 0 && vi < sh)
{
int uf = u & 0xffff;
int vf = v & 0xffff;
byte *a = sample_nearest(sp, sw, sh, 2, ui, vi);
byte *b = sample_nearest(sp, sw, sh, 2, ui+1, vi);
byte *c = sample_nearest(sp, sw, sh, 2, ui, vi+1);
byte *d = sample_nearest(sp, sw, sh, 2, ui+1, vi+1);
int y = bilerp(a[1], b[1], c[1], d[1], uf, vf);
int x = bilerp(a[0], b[0], c[0], d[0], uf, vf);
int t;
x = fz_mul255(x, alpha);
y = fz_mul255(y, alpha);
t = 255 - y;
dp[0] = x + fz_mul255(dp[0], t);
dp[1] = x + fz_mul255(dp[1], t);
dp[2] = x + fz_mul255(dp[2], t);
dp[3] = y + fz_mul255(dp[3], t);
if (hp)
hp[0] = y + fz_mul255(hp[0], t);
}
dp += 4;
if (hp)
hp++;
u += fa;
v += fb;
}
}
static inline void
fz_paint_affine_color_N_lerp(byte *dp, byte *sp, int sw, int sh, int u, int v, int fa, int fb, int w, int n, byte *color, byte *hp)
{
int n1 = n - 1;
int sa = color[n1];
int k;
while (w--)
{
int ui = u >> 16;
int vi = v >> 16;
if (ui >= 0 && ui < sw && vi >= 0 && vi < sh)
{
int uf = u & 0xffff;
int vf = v & 0xffff;
byte *a = sample_nearest(sp, sw, sh, 1, ui, vi);
byte *b = sample_nearest(sp, sw, sh, 1, ui+1, vi);
byte *c = sample_nearest(sp, sw, sh, 1, ui, vi+1);
byte *d = sample_nearest(sp, sw, sh, 1, ui+1, vi+1);
int ma = bilerp(a[0], b[0], c[0], d[0], uf, vf);
int masa = FZ_COMBINE(FZ_EXPAND(ma), sa);
for (k = 0; k < n1; k++)
dp[k] = FZ_BLEND(color[k], dp[k], masa);
dp[n1] = FZ_BLEND(255, dp[n1], masa);
if (hp)
hp[0] = FZ_BLEND(255, hp[0], masa);
}
dp += n;
if (hp)
hp++;
u += fa;
v += fb;
}
}
static inline void
fz_paint_affine_alpha_N_lerp(byte *dp, byte *sp, int sw, int sh, int u, int v, int fa, int fb, int w, int n, int alpha, byte *hp)
{
int k;
int n1 = n-1;
while (w--)
{
int ui = u >> 16;
int vi = v >> 16;
if (ui >= 0 && ui < sw && vi >= 0 && vi < sh)
{
int uf = u & 0xffff;
int vf = v & 0xffff;
byte *a = sample_nearest(sp, sw, sh, n, ui, vi);
byte *b = sample_nearest(sp, sw, sh, n, ui+1, vi);
byte *c = sample_nearest(sp, sw, sh, n, ui, vi+1);
byte *d = sample_nearest(sp, sw, sh, n, ui+1, vi+1);
int xa = bilerp(a[n1], b[n1], c[n1], d[n1], uf, vf);
int t;
xa = fz_mul255(xa, alpha);
t = 255 - xa;
for (k = 0; k < n1; k++)
{
int x = bilerp(a[k], b[k], c[k], d[k], uf, vf);
dp[k] = fz_mul255(x, alpha) + fz_mul255(dp[k], t);
}
dp[n1] = xa + fz_mul255(dp[n1], t);
if (hp)
hp[0] = xa + fz_mul255(hp[0], t);
}
dp += n;
if (hp)
hp++;
u += fa;
v += fb;
}
}
