static inline void convolve2D_XY(unsigned int const x, unsigned int const y, unsigned char *const out_data, unsigned char const *const in_data, unsigned int const width, unsigned int const height, double const *const kernel, unsigned int const orderX, unsigned int const orderY, unsigned int const targetX, unsigned int const targetY, double const bias) {
double result_R = 0;
double result_G = 0;
double result_B = 0;
double result_A = 0;
unsigned int iBegin = Y_LOWER ? targetY-y : 0; // Note that to prevent signed/unsigned problems this requires that y<=targetY (which is true)
unsigned int iEnd = Y_UPPER ? height+targetY-y : orderY; // And this requires that y<=height+targetY (which is trivially true), in addition it should be true that height+targetY-y<=orderY (or equivalently y>=height+targetY-orderY, which is true)
unsigned int jBegin = X_LOWER ? targetX-x : 0;
unsigned int jEnd = X_UPPER ? width+targetX-x : orderX;
for (unsigned int i=iBegin; i<iEnd; i++){
for (unsigned int j=jBegin; j<jEnd; j++){
unsigned int index = 4*( x - targetX + j + width*(y - targetY + i) );
unsigned int kernel_index = orderX-j-1 + orderX*(orderY-i-1);
double k = PREMULTIPLIED ? kernel[kernel_index] : in_data[index+3] * kernel[kernel_index];
result_R += in_data[index+0] * k;
result_G += in_data[index+1] * k;
result_B += in_data[index+2] * k;
result_A += in_data[index+3] * kernel[kernel_index];
}
}
unsigned int const out_index = 4*( x + width*y );
if (PRESERVE_ALPHA) {
out_data[out_index+3] = in_data[out_index+3];
} else if (PREMULTIPLIED) {
out_data[out_index+3] = CLAMP_D_TO_U8(result_A + 255*bias);
} else {
out_data[out_index+3] = CLAMP_D_TO_U8(result_A + bias);
}
if (PREMULTIPLIED) {
out_data[out_index+0] = CLAMP_D_TO_U8_ALPHA(result_R + out_data[out_index+3]*bias, out_data[out_index+3]); // CLAMP includes rounding!
out_data[out_index+1] = CLAMP_D_TO_U8_ALPHA(result_G + out_data[out_index+3]*bias, out_data[out_index+3]);
out_data[out_index+2] = CLAMP_D_TO_U8_ALPHA(result_B + out_data[out_index+3]*bias, out_data[out_index+3]);
} else if (out_data[out_index+3]==0) {
out_data[out_index+0] = 0; // TODO: Is there a more sensible value that can be used here?
out_data[out_index+1] = 0;
out_data[out_index+2] = 0;
} else {
out_data[out_index+0] = CLAMP_D_TO_U8(result_R / out_data[out_index+3] + bias); // CLAMP includes rounding!
out_data[out_index+1] = CLAMP_D_TO_U8(result_G / out_data[out_index+3] + bias);
out_data[out_index+2] = CLAMP_D_TO_U8(result_B / out_data[out_index+3] + bias);
}
}
G_GNUC_PURE
guint32 turbulencePixel(Geom::Point const &p) const {
int wrapx = _wrapx, wrapy = _wrapy, wrapw = _wrapw, wraph = _wraph;
double pixel[4];
double x = p[Geom::X] * _baseFreq[Geom::X];
double y = p[Geom::Y] * _baseFreq[Geom::Y];
double ratio = 1.0;
for (int k = 0; k < 4; ++k)
pixel[k] = 0.0;
for(int octave = 0; octave < _octaves; ++octave)
{
double tx = x + PerlinOffset;
double bx = floor(tx);
double rx0 = tx - bx, rx1 = rx0 - 1.0;
int bx0 = bx, bx1 = bx0 + 1;
double ty = y + PerlinOffset;
double by = floor(ty);
double ry0 = ty - by, ry1 = ry0 - 1.0;
int by0 = by, by1 = by0 + 1;
if (_stitchTiles) {
if (bx0 >= wrapx) bx0 -= wrapw;
if (bx1 >= wrapx) bx1 -= wrapw;
if (by0 >= wrapy) by0 -= wraph;
if (by1 >= wrapy) by1 -= wraph;
}
bx0 &= BMask;
bx1 &= BMask;
by0 &= BMask;
by1 &= BMask;
int i = _latticeSelector[bx0];
int j = _latticeSelector[bx1];
int b00 = _latticeSelector[i + by0];
int b01 = _latticeSelector[i + by1];
int b10 = _latticeSelector[j + by0];
int b11 = _latticeSelector[j + by1];
double sx = _scurve(rx0);
double sy = _scurve(ry0);
double result[4];
// channel numbering: R=0, G=1, B=2, A=3
for (int k = 0; k < 4; ++k) {
double const *qxa = _gradient[b00][k];
double const *qxb = _gradient[b10][k];
double a = _lerp(sx, rx0 * qxa[0] + ry0 * qxa[1],
rx1 * qxb[0] + ry0 * qxb[1]);
double const *qya = _gradient[b01][k];
double const *qyb = _gradient[b11][k];
double b = _lerp(sx, rx0 * qya[0] + ry1 * qya[1],
rx1 * qyb[0] + ry1 * qyb[1]);
result[k] = _lerp(sy, a, b);
}
if (_fractalnoise) {
for (int k = 0; k < 4; ++k)
pixel[k] += result[k] / ratio;
} else {
for (int k = 0; k < 4; ++k)
pixel[k] += fabs(result[k]) / ratio;
}
x *= 2;
y *= 2;
ratio *= 2;
if(_stitchTiles)
{
// Update stitch values. Subtracting PerlinOffset before the multiplication and
// adding it afterward simplifies to subtracting it once.
wrapw *= 2;
wraph *= 2;
wrapx = wrapx*2 - PerlinOffset;
wrapy = wrapy*2 - PerlinOffset;
}
}
if (_fractalnoise) {
guint32 r = CLAMP_D_TO_U8((pixel[0]*255.0 + 255.0) / 2);
guint32 g = CLAMP_D_TO_U8((pixel[1]*255.0 + 255.0) / 2);
guint32 b = CLAMP_D_TO_U8((pixel[2]*255.0 + 255.0) / 2);
guint32 a = CLAMP_D_TO_U8((pixel[3]*255.0 + 255.0) / 2);
r = premul_alpha(r, a);
g = premul_alpha(g, a);
b = premul_alpha(b, a);
ASSEMBLE_ARGB32(pxout, a,r,g,b);
return pxout;
} else {
guint32 r = CLAMP_D_TO_U8(pixel[0]*255.0);
guint32 g = CLAMP_D_TO_U8(pixel[1]*255.0);
guint32 b = CLAMP_D_TO_U8(pixel[2]*255.0);
guint32 a = CLAMP_D_TO_U8(pixel[3]*255.0);
r = premul_alpha(r, a);
g = premul_alpha(g, a);
b = premul_alpha(b, a);
ASSEMBLE_ARGB32(pxout, a,r,g,b);
return pxout;
}
}
int FilterSpecularLighting::render(FilterSlot &slot, FilterUnits const &units) {
NRPixBlock *in = slot.get(_input);
if (!in) {
g_warning("Missing source image for feSpecularLighting (in=%d)", _input);
return 1;
}
NRPixBlock *out = new NRPixBlock;
//Fvector *L = NULL; //vector to the light
int w = in->area.x1 - in->area.x0;
int h = in->area.y1 - in->area.y0;
int x0 = in->area.x0;
int y0 = in->area.y0;
int i, j;
//As long as FilterRes and kernel unit is not supported we hardcode the
//default value
int dx = 1; //TODO setup
int dy = 1; //TODO setup
//surface scale
Geom::Matrix trans = units.get_matrix_primitiveunits2pb();
gdouble ss = surfaceScale * trans[0];
gdouble ks = specularConstant; //diffuse lighting constant
NR::Fvector L, N, LC, H;
gdouble inter;
nr_pixblock_setup_fast(out, NR_PIXBLOCK_MODE_R8G8B8A8N,
in->area.x0, in->area.y0, in->area.x1, in->area.y1,
true);
unsigned char *data_i = NR_PIXBLOCK_PX (in);
unsigned char *data_o = NR_PIXBLOCK_PX (out);
//No light, nothing to do
switch (light_type) {
case DISTANT_LIGHT:
//the light vector is constant
{
DistantLight *dl = new DistantLight(light.distant, lighting_color);
dl->light_vector(L);
dl->light_components(LC);
NR::normalized_sum(H, L, NR::EYE_VECTOR);
//finish the work
for (i = 0, j = 0; i < w*h; i++) {
NR::compute_surface_normal(N, ss, in, i / w, i % w, dx, dy);
COMPUTE_INTER(inter, N, H, ks, specularExponent);
data_o[j++] = CLAMP_D_TO_U8(inter * LC[LIGHT_RED]); // CLAMP includes rounding!
data_o[j++] = CLAMP_D_TO_U8(inter * LC[LIGHT_GREEN]);
data_o[j++] = CLAMP_D_TO_U8(inter * LC[LIGHT_BLUE]);
data_o[j] = MAX(MAX(data_o[j-3], data_o[j-2]), data_o[j-1]);
++j;
}
out->empty = FALSE;
delete dl;
}
break;
case POINT_LIGHT:
{
PointLight *pl = new PointLight(light.point, lighting_color, trans);
pl->light_components(LC);
//TODO we need a reference to the filter to determine primitiveUnits
//if objectBoundingBox is used, use a different matrix for light_vector
// UPDATE: trans is now correct matrix from primitiveUnits to
// pixblock coordinates
//finish the work
for (i = 0, j = 0; i < w*h; i++) {
NR::compute_surface_normal(N, ss, in, i / w, i % w, dx, dy);
pl->light_vector(L,
i % w + x0,
i / w + y0,
ss * (double) data_i[4*i+3]/ 255);
NR::normalized_sum(H, L, NR::EYE_VECTOR);
COMPUTE_INTER(inter, N, H, ks, specularExponent);
data_o[j++] = CLAMP_D_TO_U8(inter * LC[LIGHT_RED]);
data_o[j++] = CLAMP_D_TO_U8(inter * LC[LIGHT_GREEN]);
data_o[j++] = CLAMP_D_TO_U8(inter * LC[LIGHT_BLUE]);
data_o[j] = MAX(MAX(data_o[j-3], data_o[j-2]), data_o[j-1]);
++j;
}
out->empty = FALSE;
delete pl;
}
break;
case SPOT_LIGHT:
{
SpotLight *sl = new SpotLight(light.spot, lighting_color, trans);
//TODO we need a reference to the filter to determine primitiveUnits
//if objectBoundingBox is used, use a different matrix for light_vector
// UPDATE: trans is now correct matrix from primitiveUnits to
// pixblock coordinates
//finish the work
for (i = 0, j = 0; i < w*h; i++) {
NR::compute_surface_normal(N, ss, in, i / w, i % w, dx, dy);
sl->light_vector(L,
i % w + x0,
i / w + y0,
ss * (double) data_i[4*i+3]/ 255);
sl->light_components(LC, L);
NR::normalized_sum(H, L, NR::EYE_VECTOR);
COMPUTE_INTER(inter, N, H, ks, specularExponent);
data_o[j++] = CLAMP_D_TO_U8(inter * LC[LIGHT_RED]);
data_o[j++] = CLAMP_D_TO_U8(inter * LC[LIGHT_GREEN]);
data_o[j++] = CLAMP_D_TO_U8(inter * LC[LIGHT_BLUE]);
data_o[j] = MAX(MAX(data_o[j-3], data_o[j-2]), data_o[j-1]);
++j;
}
out->empty = FALSE;
delete sl;
}
break;
//else unknown light source, doing nothing
case NO_LIGHT:
default:
{
if (light_type != NO_LIGHT)
g_warning("unknown light source %d", light_type);
out->empty = false;
}
}
//finishing
slot.set(_output, out);
//nr_pixblock_release(in);
//delete in;
return 0;
}