QImage combine(QList<QImage> images) {
if (images.length() == 1) return images.first();
genTable();
QSize size = images[0].size();
const int width = size.width();
const int height = size.height();
QImage ret(size, QImage::Format_ARGB32_Premultiplied);
for (int y = 0; y < height; ++y) {
uchar* __restrict q = ret.scanLine(y);
for (int x = 0; x < width; ++x) {
u32 sum[4] = {0};
foreach (const QImage& img, images) {
QRgb rgb = img.pixel(x, y);
sum[0] += rgb & 0xFFu;
sum[1] += (rgb >> 8u) & 0xFFu;
sum[2] += (rgb >> 16u) & 0xFFu;
sum[3] += (rgb >> 24u) & 0xFFu;
}
const u32 multiplier = table[std::max(sum[3], u32(255u))];
#define PROCESS_PIXEL(i) *q++ = (uchar) ((u64(sum[i] * 255u) * multiplier) >> 32);
PROCESS_PIXEL(0) PROCESS_PIXEL(1) PROCESS_PIXEL(2)
#undef PROCESS_PIXEL
*q++ = (u8) std::min(sum[3], u32(255u));
}
}
void Color3WayMain::process_pixel(float *r,
float *g,
float *b,
float r_in,
float g_in,
float b_in,
float x,
float y)
{
float r_factor[SECTIONS];
float g_factor[SECTIONS];
float b_factor[SECTIONS];
float s_factor[SECTIONS];
float v_factor[SECTIONS];
for(int i = 0; i < SECTIONS; i++)
{
calculate_factors(r_factor + i,
g_factor + i,
b_factor + i,
x,
y);
CALCULATE_FACTORS(s_factor[i], v_factor[i], 0, 0)
}
PROCESS_PIXEL(r_in, g_in, b_in);
*r = r_in;
*g = g_in;
*b = b_in;
}
