static void streaks(NodeGlare* ndg, CompBuf* dst, CompBuf* src)
{
CompBuf *bsrc, *tsrc, *tdst, *sbuf;
int x, y, n;
unsigned int nump=0;
fRGB c1, c2, c3, c4;
float a, ang = 360.f/(float)ndg->angle;
bsrc = BTP(src, ndg->threshold, 1 << ndg->quality);
tsrc = dupalloc_compbuf(bsrc); // sample from buffer
tdst = alloc_compbuf(tsrc->x, tsrc->y, tsrc->type, 1); // sample to buffer
sbuf = alloc_compbuf(tsrc->x, tsrc->y, tsrc->type, 1); // streak sum buffer
for (a=0.f; a<360.f; a+=ang) {
const float an = (a + (float)ndg->angle_ofs)*(float)M_PI/180.f;
const float vx = cos((double)an), vy = sin((double)an);
for (n=0; n<ndg->iter; ++n) {
const float p4 = pow(4.0, (double)n);
const float vxp = vx*p4, vyp = vy*p4;
const float wt = pow((double)ndg->fade, (double)p4);
const float cmo = 1.f - pow((double)ndg->colmod, (double)n+1); // colormodulation amount relative to current pass
float* tdstcol = tdst->rect;
for (y=0; y<tsrc->y; ++y) {
for (x=0; x<tsrc->x; ++x, tdstcol+=4) {
// first pass no offset, always same for every pass, exact copy,
// otherwise results in uneven brightness, only need once
if (n==0) qd_getPixel(tsrc, x, y, c1); else c1[0]=c1[1]=c1[2]=0;
qd_getPixelLerp(tsrc, x + vxp, y + vyp, c2);
qd_getPixelLerp(tsrc, x + vxp*2.f, y + vyp*2.f, c3);
qd_getPixelLerp(tsrc, x + vxp*3.f, y + vyp*3.f, c4);
// modulate color to look vaguely similar to a color spectrum
fRGB_rgbmult(c2, 1.f, cmo, cmo);
fRGB_rgbmult(c3, cmo, cmo, 1.f);
fRGB_rgbmult(c4, cmo, 1.f, cmo);
tdstcol[0] = 0.5f*(tdstcol[0] + c1[0] + wt*(c2[0] + wt*(c3[0] + wt*c4[0])));
tdstcol[1] = 0.5f*(tdstcol[1] + c1[1] + wt*(c2[1] + wt*(c3[1] + wt*c4[1])));
tdstcol[2] = 0.5f*(tdstcol[2] + c1[2] + wt*(c2[2] + wt*(c3[2] + wt*c4[2])));
}
}
memcpy(tsrc->rect, tdst->rect, sizeof(float)*tdst->x*tdst->y*tdst->type);
}
addImage(sbuf, tsrc, 1.f/(float)(6 - ndg->iter));
memset(tdst->rect, 0, tdst->x*tdst->y*tdst->type*sizeof(float));
memcpy(tsrc->rect, bsrc->rect, bsrc->x*bsrc->y*bsrc->type*sizeof(float));
nump++;
}
mixImages(dst, sbuf, 0.5f + 0.5f*ndg->mix);
free_compbuf(tsrc);
free_compbuf(tdst);
free_compbuf(sbuf);
free_compbuf(bsrc);
}
static void fglow(NodeGlare* ndg, CompBuf* dst, CompBuf* src)
{
int x, y;
float scale, u, v, r, w, d;
fRGB fcol;
CompBuf *tsrc, *ckrn;
unsigned int sz = 1 << ndg->size;
const float cs_r = 1.f, cs_g = 1.f, cs_b = 1.f;
// temp. src image
tsrc = BTP(src, ndg->threshold, 1 << ndg->quality);
// make the convolution kernel
ckrn = alloc_compbuf(sz, sz, CB_RGBA, 1);
scale = 0.25f*sqrtf(sz*sz);
for (y=0; y<sz; ++y) {
v = 2.f*(y / (float)sz) - 1.f;
for (x=0; x<sz; ++x) {
u = 2.f*(x / (float)sz) - 1.f;
r = (u*u + v*v)*scale;
d = -sqrtf(sqrtf(sqrtf(r)))*9.f;
fcol[0] = expf(d*cs_r), fcol[1] = expf(d*cs_g), fcol[2] = expf(d*cs_b);
// linear window good enough here, visual result counts, not scientific analysis
//w = (1.f-fabs(u))*(1.f-fabs(v));
// actually, Hanning window is ok, cos^2 for some reason is slower
w = (0.5f + 0.5f*cos((double)u*M_PI))*(0.5f + 0.5f*cos((double)v*M_PI));
fRGB_mult(fcol, w);
qd_setPixel(ckrn, x, y, fcol);
}
}
convolve(tsrc, tsrc, ckrn);
free_compbuf(ckrn);
mixImages(dst, tsrc, 0.5f + 0.5f*ndg->mix);
free_compbuf(tsrc);
}
static void ghosts(NodeGlare* ndg, CompBuf* dst, CompBuf* src)
{
// colormodulation and scale factors (cm & scalef) for 16 passes max: 64
int x, y, n, p, np;
fRGB c, tc, cm[64];
float sc, isc, u, v, sm, s, t, ofs, scalef[64];
CompBuf *tbuf1, *tbuf2, *gbuf;
const float cmo = 1.f - ndg->colmod;
const int qt = 1 << ndg->quality;
const float s1 = 4.f/(float)qt, s2 = 2.f*s1;
gbuf = BTP(src, ndg->threshold, qt);
tbuf1 = dupalloc_compbuf(gbuf);
IIR_gauss(tbuf1, s1, 0, 3);
IIR_gauss(tbuf1, s1, 1, 3);
IIR_gauss(tbuf1, s1, 2, 3);
tbuf2 = dupalloc_compbuf(tbuf1);
IIR_gauss(tbuf2, s2, 0, 3);
IIR_gauss(tbuf2, s2, 1, 3);
IIR_gauss(tbuf2, s2, 2, 3);
if (ndg->iter & 1) ofs = 0.5f; else ofs = 0.f;
for (x=0; x<(ndg->iter*4); x++) {
y = x & 3;
cm[x][0] = cm[x][1] = cm[x][2] = 1;
if (y==1) fRGB_rgbmult(cm[x], 1.f, cmo, cmo);
if (y==2) fRGB_rgbmult(cm[x], cmo, cmo, 1.f);
if (y==3) fRGB_rgbmult(cm[x], cmo, 1.f, cmo);
scalef[x] = 2.1f*(1.f-(x+ofs)/(float)(ndg->iter*4));
if (x & 1) scalef[x] = -0.99f/scalef[x];
}
sc = 2.13;
isc = -0.97;
for (y=0; y<gbuf->y; y++) {
v = (float)(y+0.5f) / (float)gbuf->y;
for (x=0; x<gbuf->x; x++) {
u = (float)(x+0.5f) / (float)gbuf->x;
s = (u-0.5f)*sc + 0.5f, t = (v-0.5f)*sc + 0.5f;
qd_getPixelLerp(tbuf1, s*gbuf->x, t*gbuf->y, c);
sm = smoothMask(s, t);
fRGB_mult(c, sm);
s = (u-0.5f)*isc + 0.5f, t = (v-0.5f)*isc + 0.5f;
qd_getPixelLerp(tbuf2, s*gbuf->x - 0.5f, t*gbuf->y - 0.5f, tc);
sm = smoothMask(s, t);
fRGB_madd(c, tc, sm);
qd_setPixel(gbuf, x, y, c);
}
}
memset(tbuf1->rect, 0, tbuf1->x*tbuf1->y*tbuf1->type*sizeof(float));
for (n=1; n<ndg->iter; n++) {
for (y=0; y<gbuf->y; y++) {
v = (float)(y+0.5f) / (float)gbuf->y;
for (x=0; x<gbuf->x; x++) {
u = (float)(x+0.5f) / (float)gbuf->x;
tc[0] = tc[1] = tc[2] = 0.f;
for (p=0;p<4;p++) {
np = (n<<2) + p;
s = (u-0.5f)*scalef[np] + 0.5f;
t = (v-0.5f)*scalef[np] + 0.5f;
qd_getPixelLerp(gbuf, s*gbuf->x - 0.5f, t*gbuf->y - 0.5f, c);
fRGB_colormult(c, cm[np]);
sm = smoothMask(s, t)*0.25f;
fRGB_madd(tc, c, sm);
}
p = (x + y*tbuf1->x)*tbuf1->type;
tbuf1->rect[p] += tc[0];
tbuf1->rect[p+1] += tc[1];
tbuf1->rect[p+2] += tc[2];
}
}
memcpy(gbuf->rect, tbuf1->rect, tbuf1->x*tbuf1->y*tbuf1->type*sizeof(float));
}
free_compbuf(tbuf1);
free_compbuf(tbuf2);
mixImages(dst, gbuf, 0.5f + 0.5f*ndg->mix);
free_compbuf(gbuf);
}
TEST(DeferredImageDecoderTestWoPlatform, mixImagesBmp) {
mixImages("/LayoutTests/fast/images/resources/lenna.bmp", 122u, 0u);
}
TEST(DeferredImageDecoderTestWoPlatform, mixImagesIco) {
mixImages("/LayoutTests/fast/images/resources/wrong-frame-dimensions.ico",
1376u, 1u);
}
TEST(DeferredImageDecoderTestWoPlatform, mixImagesWebp) {
mixImages("/LayoutTests/fast/images/resources/webp-animated.webp", 142u, 1u);
}
TEST(DeferredImageDecoderTestWoPlatform, mixImagesJpg) {
mixImages("/LayoutTests/fast/images/resources/2-dht.jpg", 177u, 0u);
}
TEST(DeferredImageDecoderTestWoPlatform, mixImagesPng) {
mixImages("/LayoutTests/fast/images/resources/mu.png", 910u, 0u);
}
TEST(DeferredImageDecoderTestWoPlatform, mixImagesGif) {
mixImages("/LayoutTests/fast/images/resources/animated.gif", 818u, 1u);
}
int main() {
mixImages("1.jpg", "2.jpg", "output.jpg");
}