NRPixBlock *FilterSlot::get(int slot_nr)
{
int index = _get_index(slot_nr);
assert(index >= 0);
/* If we didn't have the specified image, but we could create it
* from the other information we have, let's do that */
if (_slot[index] == NULL
&& (slot_nr == NR_FILTER_SOURCEALPHA
|| slot_nr == NR_FILTER_BACKGROUNDIMAGE
|| slot_nr == NR_FILTER_BACKGROUNDALPHA
|| slot_nr == NR_FILTER_FILLPAINT
|| slot_nr == NR_FILTER_STROKEPAINT))
{
/* If needed, fetch background */
if (slot_nr == NR_FILTER_BACKGROUNDIMAGE) {
NRPixBlock *pb;
pb = nr_arena_item_get_background(_arena_item);
if (pb) {
pb->empty = false;
this->set(NR_FILTER_BACKGROUNDIMAGE, pb);
} else {
NRPixBlock *source = this->get(NR_FILTER_SOURCEGRAPHIC);
pb = new NRPixBlock();
if (!pb) return NULL; // Allocation failed
nr_pixblock_setup_fast(pb, source->mode,
source->area.x0, source->area.y0,
source->area.x1, source->area.y1, true);
if (pb->size != NR_PIXBLOCK_SIZE_TINY && pb->data.px == NULL) {
// allocation failed
delete pb;
return NULL;
}
pb->empty = FALSE;
this->set(NR_FILTER_BACKGROUNDIMAGE, pb);
}
} else if (slot_nr == NR_FILTER_SOURCEALPHA) {
/* If only a alpha channel is needed, strip it from full image */
NRPixBlock *src = get(NR_FILTER_SOURCEGRAPHIC);
NRPixBlock *sa = filter_get_alpha(src);
set(NR_FILTER_SOURCEALPHA, sa);
} else if (slot_nr == NR_FILTER_BACKGROUNDALPHA) {
NRPixBlock *src = get(NR_FILTER_BACKGROUNDIMAGE);
NRPixBlock *ba = filter_get_alpha(src);
set(NR_FILTER_BACKGROUNDALPHA, ba);
} else if (slot_nr == NR_FILTER_FILLPAINT) {
/* When a paint is needed, fetch it from arena item */
// TODO
} else if (slot_nr == NR_FILTER_STROKEPAINT) {
// TODO
}
}
if (_slot[index]) {
_slot[index]->empty = false;
}
assert(slot_nr == NR_FILTER_SLOT_NOT_SET ||_slot_number[index] == slot_nr);
return _slot[index];
}
void
nr_gdk_draw_rgba32_solid (GdkDrawable *drawable, GdkGC *gc, gint x, gint y, gint w, gint h, guint32 rgba)
{
NRPixBlock pb;
nr_pixblock_setup_fast (&pb, NR_PIXBLOCK_MODE_R8G8B8A8N, 0, 0, w, h, FALSE);
nr_render_rgba32_rgb (NR_PIXBLOCK_PX (&pb), w, h, pb.rs, x, y, rgba);
gdk_draw_rgb_image (drawable, gc, x, y, w, h, GDK_RGB_DITHER_MAX, NR_PIXBLOCK_PX (&pb), pb.rs);
nr_pixblock_release (&pb);
}
void
nr_gdk_draw_gray_garbage (GdkDrawable *drawable, GdkGC *gc, gint x, gint y, gint w, gint h)
{
gint xx, yy;
for (yy = y; yy < y + h; yy += 64) {
for (xx = x; xx < x + w; xx += 64) {
NRPixBlock pb;
gint ex, ey;
ex = MIN (xx + 64, x + w);
ey = MIN (yy + 64, y + h);
nr_pixblock_setup_fast (&pb, NR_PIXBLOCK_MODE_R8G8B8, xx, yy, ex, ey, FALSE);
nr_pixblock_render_gray_noise (&pb, NULL);
gdk_draw_rgb_image (drawable, gc, xx, yy, ex - xx, ey - yy, GDK_RGB_DITHER_NONE, NR_PIXBLOCK_PX (&pb), pb.rs);
nr_pixblock_release (&pb);
}
}
}
NRPixBlock *filter_get_alpha(NRPixBlock *src)
{
NRPixBlock *dst = new NRPixBlock;
nr_pixblock_setup_fast(dst, NR_PIXBLOCK_MODE_R8G8B8A8P,
src->area.x0, src->area.y0,
src->area.x1, src->area.y1, false);
if (!dst || (dst->size != NR_PIXBLOCK_SIZE_TINY && dst->data.px == NULL)) {
g_warning("Memory allocation failed in filter_get_alpha");
delete dst;
return NULL;
}
nr_blit_pixblock_pixblock(dst, src);
unsigned char *data = NR_PIXBLOCK_PX(dst);
int end = dst->rs * (dst->area.y1 - dst->area.y0);
for (int i = 0 ; i < end ; i += 4) {
data[i + 0] = 0;
data[i + 1] = 0;
data[i + 2] = 0;
}
dst->empty = false;
return dst;
}
void
nr_pixblock_draw_line_rgba32 (NRPixBlock *d, long x0, long y0, long x1, long y1, short /*first*/, unsigned long rgba)
{
long deltax, deltay, xinc1, xinc2, yinc1, yinc2;
long den, num, numadd, numpixels;
long x, y, curpixel;
/* Pixblock */
int dbpp;
NRPixBlock spb;
unsigned char *spx;
if (x1 >= x0) {
deltax = x1 - x0;
xinc1 = 1;
xinc2 = 1;
} else {
deltax = x0 - x1;
xinc1 = -1;
xinc2 = -1;
}
if (y1 >= y0) {
deltay = y1 - y0;
yinc1 = 1;
yinc2 = 1;
} else {
deltay = y0 - y1;
yinc1 = -1;
yinc2 = -1;
}
if (deltax >= deltay) {
xinc1 = 0;
yinc2 = 0;
den = deltax;
num = deltax / 2;
numadd = deltay;
numpixels = deltax;
} else {
xinc2 = 0;
yinc1 = 0;
den = deltay;
num = deltay / 2;
numadd = deltax;
numpixels = deltay;
}
/* We can be quite sure 1x1 pixblock is TINY */
nr_pixblock_setup_fast (&spb, NR_PIXBLOCK_MODE_R8G8B8A8N, 0, 0, 1, 1, 0);
spb.empty = 0;
spx = NR_PIXBLOCK_PX (&spb);
spx[0] = NR_RGBA32_R (rgba);
spx[1] = NR_RGBA32_G (rgba);
spx[2] = NR_RGBA32_B (rgba);
spx[3] = NR_RGBA32_A (rgba);
dbpp = NR_PIXBLOCK_BPP (d);
x = x0;
y = y0;
for (curpixel = 0; curpixel <= numpixels; curpixel++) {
if ((x >= d->area.x0) && (y >= d->area.y0) && (x < d->area.x1) && (y < d->area.y1)) {
nr_compose_pixblock_pixblock_pixel (d, NR_PIXBLOCK_PX (d) + (y - d->area.y0) * d->rs + (x - d->area.x0) * dbpp, &spb, spx);
}
num += numadd;
if (num >= den) {
num -= den;
x += xinc1;
y += yinc1;
}
x += xinc2;
y += yinc2;
}
nr_pixblock_release (&spb);
}
int FilterConvolveMatrix::render(FilterSlot &slot, FilterUnits const &/*units*/) {
NRPixBlock *in = slot.get(_input);
if (!in) {
g_warning("Missing source image for feConvolveMatrix (in=%d)", _input);
return 1;
}
if (orderX<=0 || orderY<=0) {
g_warning("Empty kernel!");
return 1;
}
if (targetX<0 || targetX>=orderX || targetY<0 || targetY>=orderY) {
g_warning("Invalid target!");
return 1;
}
if (kernelMatrix.size()!=(unsigned int)(orderX*orderY)) {
g_warning("kernelMatrix does not have orderX*orderY elements!");
return 1;
}
if (bias!=0) {
g_warning("It is unknown whether Inkscape's implementation of bias in feConvolveMatrix is correct!");
// The SVG specification implies that feConvolveMatrix is defined for premultiplied colors (which makes sense).
// It also says that bias should simply be added to the result for each color (without taking the alpha into account)
// However, it also says that one purpose of bias is "to have .5 gray value be the zero response of the filter".
// It seems sensible to indeed support the latter behaviour instead of the former, but this does appear to go against the standard.
// Note that Batik simply does not support bias!=0
}
if (edgeMode!=CONVOLVEMATRIX_EDGEMODE_NONE) {
g_warning("Inkscape only supports edgeMode=\"none\" (and a filter uses a different one)!");
// Note that to properly support edgeMode the interaction with area_enlarge should be well understood (and probably something needs to change)
// area_enlarge should NOT let Inkscape enlarge the area beyond the filter area, it should only enlarge the rendered area if a part of the object is rendered to make it overlapping (enough) with adjacent parts.
}
NRPixBlock *out = new NRPixBlock;
nr_pixblock_setup_fast(out, in->mode,
in->area.x0, in->area.y0, in->area.x1, in->area.y1,
true);
unsigned char *in_data = NR_PIXBLOCK_PX(in);
unsigned char *out_data = NR_PIXBLOCK_PX(out);
unsigned int const width = in->area.x1 - in->area.x0;
unsigned int const height = in->area.y1 - in->area.y0;
// Set up predivided kernel matrix
std::vector<double> kernel(kernelMatrix);
for(size_t i=0; i<kernel.size(); i++) {
kernel[i] /= divisor; // The code that creates this object makes sure that divisor != 0
}
if (in->mode==NR_PIXBLOCK_MODE_R8G8B8A8P) {
if (preserveAlpha) {
convolve2D<true,true>(out_data, in_data, width, height, &kernel.front(), orderX, orderY, targetX, targetY, bias);
} else {
convolve2D<true,false>(out_data, in_data, width, height, &kernel.front(), orderX, orderY, targetX, targetY, bias);
}
} else {
if (preserveAlpha) {
convolve2D<false,true>(out_data, in_data, width, height, &kernel.front(), orderX, orderY, targetX, targetY, bias);
} else {
convolve2D<false,false>(out_data, in_data, width, height, &kernel.front(), orderX, orderY, targetX, targetY, bias);
}
}
out->empty = FALSE;
slot.set(_output, out);
return 0;
}
static void
sp_canvas_arena_render (SPCanvasItem *item, SPCanvasBuf *buf)
{
SPCanvasArena *arena;
gint bw, bh, sw, sh;
gint x, y;
arena = SP_CANVAS_ARENA (item);
nr_arena_item_invoke_update (arena->root, NULL, &arena->gc,
NR_ARENA_ITEM_STATE_BBOX | NR_ARENA_ITEM_STATE_RENDER,
NR_ARENA_ITEM_STATE_NONE);
if (buf->is_bg) {
sp_canvas_clear_buffer (buf);
buf->is_bg = FALSE;
buf->is_buf = TRUE;
}
bw = buf->rect.x1 - buf->rect.x0;
bh = buf->rect.y1 - buf->rect.y0;
if ((bw < 1) || (bh < 1)) return;
/* 65536 is max cached buffer and we need 4 channels */
if (bw * bh < 16384) {
/* We can go with single buffer */
sw = bw;
sh = bh;
} else if (bw <= 2048) {
/* Go with row buffer */
sw = bw;
sh = 16384 / bw;
} else if (bh <= 2048) {
/* Go with column buffer */
sw = 16384 / bh;
sh = bh;
} else {
sw = 128;
sh = 128;
}
/* fixme: RGB transformed bitmap blit is not implemented (Lauris) */
/* And even if it would be, unless it uses MMX there is little reason to go RGB */
#define STRICT_RGBA
for (y = buf->rect.y0; y < buf->rect.y1; y += sh) {
for (x = buf->rect.x0; x < buf->rect.x1; x += sw) {
NRRectL area;
#ifdef STRICT_RGBA
NRPixBlock pb;
#endif
NRPixBlock cb;
area.x0 = x;
area.y0 = y;
area.x1 = MIN (x + sw, buf->rect.x1);
area.y1 = MIN (y + sh, buf->rect.y1);
#ifdef STRICT_RGBA
nr_pixblock_setup_fast (&pb, NR_PIXBLOCK_MODE_R8G8B8A8P, area.x0, area.y0, area.x1, area.y1, TRUE);
/* fixme: */
pb.empty = FALSE;
#endif
nr_pixblock_setup_extern (&cb, NR_PIXBLOCK_MODE_R8G8B8, area.x0, area.y0, area.x1, area.y1,
buf->buf + (y - buf->rect.y0) * buf->buf_rowstride + 3 * (x - buf->rect.x0),
buf->buf_rowstride,
FALSE, FALSE);
#ifdef STRICT_RGBA
nr_arena_item_invoke_render (arena->root, &area, &pb, 0);
nr_blit_pixblock_pixblock (&cb, &pb);
nr_pixblock_release (&pb);
#else
nr_arena_item_invoke_render (arena->root, &area, &cb, 0);
#endif
nr_pixblock_release (&cb);
}
}
}
void FilterSlot::set(int slot_nr, NRPixBlock *pb)
{
/* Unnamed slot is for saving filter primitive results, when parameter
* 'result' is not set. Only the filter immediately after this one
* can access unnamed results, so we don't have to worry about overwriting
* previous results in filter chain. On the other hand, we may not
* overwrite any other image with this one, because they might be
* accessed later on. */
int index = ((slot_nr != NR_FILTER_SLOT_NOT_SET)
? _get_index(slot_nr)
: _get_index(NR_FILTER_UNNAMED_SLOT));
assert(index >= 0);
// Unnamed slot is only for Inkscape::Filters::FilterSlot internal use.
assert(slot_nr != NR_FILTER_UNNAMED_SLOT);
assert(slot_nr == NR_FILTER_SLOT_NOT_SET ||_slot_number[index] == slot_nr);
if (slot_nr == NR_FILTER_SOURCEGRAPHIC || slot_nr == NR_FILTER_BACKGROUNDIMAGE) {
Geom::Matrix trans = units.get_matrix_display2pb();
if (fabs(trans[1]) > 1e-6 || fabs(trans[2]) > 1e-6) {
NRPixBlock *trans_pb = new NRPixBlock;
int x0 = pb->area.x0;
int y0 = pb->area.y0;
int x1 = pb->area.x1;
int y1 = pb->area.y1;
int min_x = _min4(trans[0] * x0 + trans[2] * y0 + trans[4],
trans[0] * x0 + trans[2] * y1 + trans[4],
trans[0] * x1 + trans[2] * y0 + trans[4],
trans[0] * x1 + trans[2] * y1 + trans[4]);
int max_x = _max4(trans[0] * x0 + trans[2] * y0 + trans[4],
trans[0] * x0 + trans[2] * y1 + trans[4],
trans[0] * x1 + trans[2] * y0 + trans[4],
trans[0] * x1 + trans[2] * y1 + trans[4]);
int min_y = _min4(trans[1] * x0 + trans[3] * y0 + trans[5],
trans[1] * x0 + trans[3] * y1 + trans[5],
trans[1] * x1 + trans[3] * y0 + trans[5],
trans[1] * x1 + trans[3] * y1 + trans[5]);
int max_y = _max4(trans[1] * x0 + trans[3] * y0 + trans[5],
trans[1] * x0 + trans[3] * y1 + trans[5],
trans[1] * x1 + trans[3] * y0 + trans[5],
trans[1] * x1 + trans[3] * y1 + trans[5]);
nr_pixblock_setup_fast(trans_pb, pb->mode,
min_x, min_y,
max_x, max_y, true);
if (trans_pb->size != NR_PIXBLOCK_SIZE_TINY && trans_pb->data.px == NULL) {
/* TODO: this gets hit occasionally. Worst case scenario:
* images are exported in horizontal stripes. One stripe
* is not too high, but can get thousands of pixels wide.
* Rotate this 45 degrees -> _huge_ image */
g_warning("Memory allocation failed in Inkscape::Filters::FilterSlot::set (transform)");
return;
}
if (filterquality == FILTER_QUALITY_BEST) {
NR::transform_bicubic(trans_pb, pb, trans);
} else {
NR::transform_nearest(trans_pb, pb, trans);
}
nr_pixblock_release(pb);
delete pb;
pb = trans_pb;
} else if (fabs(trans[0] - 1) > 1e-6 || fabs(trans[3] - 1) > 1e-6) {
NRPixBlock *trans_pb = new NRPixBlock;
int x0 = pb->area.x0;
int y0 = pb->area.y0;
int x1 = pb->area.x1;
int y1 = pb->area.y1;
int min_x = _min2(trans[0] * x0 + trans[4],
trans[0] * x1 + trans[4]);
int max_x = _max2(trans[0] * x0 + trans[4],
trans[0] * x1 + trans[4]);
int min_y = _min2(trans[3] * y0 + trans[5],
trans[3] * y1 + trans[5]);
int max_y = _max2(trans[3] * y0 + trans[5],
trans[3] * y1 + trans[5]);
nr_pixblock_setup_fast(trans_pb, pb->mode,
min_x, min_y, max_x, max_y, true);
if (trans_pb->size != NR_PIXBLOCK_SIZE_TINY && trans_pb->data.px == NULL) {
g_warning("Memory allocation failed in Inkscape::Filters::FilterSlot::set (scaling)");
return;
}
NR::scale_bicubic(trans_pb, pb);
nr_pixblock_release(pb);
delete pb;
pb = trans_pb;
}
}
if(_slot[index]) {
nr_pixblock_release(_slot[index]);
delete _slot[index];
}
_slot[index] = pb;
_last_out = index;
}
static gint sp_dropper_context_root_handler(SPEventContext *event_context, GdkEvent *event)
{
SPDropperContext *dc = (SPDropperContext *) event_context;
int ret = FALSE;
SPDesktop *desktop = event_context->desktop;
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
int pick = prefs->getInt("/tools/dropper/pick", SP_DROPPER_PICK_VISIBLE);
bool setalpha = prefs->getBool("/tools/dropper/setalpha", true);
switch (event->type) {
case GDK_BUTTON_PRESS:
if (event->button.button == 1 && !event_context->space_panning) {
dc->centre = Geom::Point(event->button.x, event->button.y);
dc->dragging = TRUE;
ret = TRUE;
}
break;
case GDK_MOTION_NOTIFY:
if (event->motion.state & GDK_BUTTON2_MASK) {
// pass on middle-drag
ret = FALSE;
break;
} else if (!event_context->space_panning) {
// otherwise, constantly calculate color no matter is any button pressed or not
double rw = 0.0;
double W(0), R(0), G(0), B(0), A(0);
if (dc->dragging) {
// calculate average
// radius
rw = std::min(Geom::L2(Geom::Point(event->button.x, event->button.y) - dc->centre), 400.0);
if (rw == 0) { // happens sometimes, little idea why...
break;
}
Geom::Point const cd = desktop->w2d(dc->centre);
Geom::Matrix const w2dt = desktop->w2d();
const double scale = rw * w2dt.descrim();
Geom::Matrix const sm( Geom::Scale(scale, scale) * Geom::Translate(cd) );
sp_canvas_item_affine_absolute(dc->area, sm);
sp_canvas_item_show(dc->area);
/* Get buffer */
const int x0 = (int) floor(dc->centre[Geom::X] - rw);
const int y0 = (int) floor(dc->centre[Geom::Y] - rw);
const int x1 = (int) ceil(dc->centre[Geom::X] + rw);
const int y1 = (int) ceil(dc->centre[Geom::Y] + rw);
if ((x1 > x0) && (y1 > y0)) {
NRPixBlock pb;
nr_pixblock_setup_fast(&pb, NR_PIXBLOCK_MODE_R8G8B8A8P, x0, y0, x1, y1, TRUE);
/* fixme: (Lauris) */
sp_canvas_arena_render_pixblock(SP_CANVAS_ARENA(sp_desktop_drawing(desktop)), &pb);
for (int y = y0; y < y1; y++) {
const unsigned char *s = NR_PIXBLOCK_PX(&pb) + (y - y0) * pb.rs;
for (int x = x0; x < x1; x++) {
const double dx = x - dc->centre[Geom::X];
const double dy = y - dc->centre[Geom::Y];
const double w = exp(-((dx * dx) + (dy * dy)) / (rw * rw));
W += w;
R += w * s[0];
G += w * s[1];
B += w * s[2];
A += w * s[3];
s += 4;
}
}
nr_pixblock_release(&pb);
R = (R + 0.001) / (255.0 * W);
G = (G + 0.001) / (255.0 * W);
B = (B + 0.001) / (255.0 * W);
A = (A + 0.001) / (255.0 * W);
R = CLAMP(R, 0.0, 1.0);
G = CLAMP(G, 0.0, 1.0);
B = CLAMP(B, 0.0, 1.0);
A = CLAMP(A, 0.0, 1.0);
}
} else {
// pick single pixel
NRPixBlock pb;
int x = (int) floor(event->button.x);
int y = (int) floor(event->button.y);
nr_pixblock_setup_fast(&pb, NR_PIXBLOCK_MODE_R8G8B8A8P, x, y, x+1, y+1, TRUE);
sp_canvas_arena_render_pixblock(SP_CANVAS_ARENA(sp_desktop_drawing(desktop)), &pb);
const unsigned char *s = NR_PIXBLOCK_PX(&pb);
R = s[0] / 255.0;
G = s[1] / 255.0;
B = s[2] / 255.0;
A = s[3] / 255.0;
}
if (pick == SP_DROPPER_PICK_VISIBLE) {
// compose with page color
guint32 bg = sp_desktop_namedview(desktop)->pagecolor;
R = R + (SP_RGBA32_R_F(bg)) * (1 - A);
G = G + (SP_RGBA32_G_F(bg)) * (1 - A);
B = B + (SP_RGBA32_B_F(bg)) * (1 - A);
A = 1.0;
} else {
// un-premultiply color channels
if (A > 0) {
R /= A;
G /= A;
B /= A;
}
}
if (fabs(A) < 1e-4) {
A = 0; // suppress exponentials, CSS does not allow that
}
// remember color
dc->R = R;
dc->G = G;
dc->B = B;
dc->alpha = A;
// status message
double alpha_to_set = setalpha? dc->alpha : 1.0;
guint32 c32 = SP_RGBA32_F_COMPOSE(R, G, B, alpha_to_set);
gchar c[64];
sp_svg_write_color(c, sizeof(c), c32);
// alpha of color under cursor, to show in the statusbar
// locale-sensitive printf is OK, since this goes to the UI, not into SVG
gchar *alpha = g_strdup_printf(_(" alpha %.3g"), alpha_to_set);
// where the color is picked, to show in the statusbar
gchar *where = dc->dragging ? g_strdup_printf(_(", averaged with radius %d"), (int) rw) : g_strdup_printf(_(" under cursor"));
// message, to show in the statusbar
const gchar *message = dc->dragging ? _("<b>Release mouse</b> to set color.") : _("<b>Click</b> to set fill, <b>Shift+click</b> to set stroke; <b>drag</b> to average color in area; with <b>Alt</b> to pick inverse color; <b>Ctrl+C</b> to copy the color under mouse to clipboard");
event_context->defaultMessageContext()->setF(
Inkscape::NORMAL_MESSAGE,
"<b>%s%s</b>%s. %s", c,
(pick == SP_DROPPER_PICK_VISIBLE)? "" : alpha,
where, message
);
g_free(where);
g_free(alpha);
ret = TRUE;
}
break;
case GDK_BUTTON_RELEASE:
if (event->button.button == 1 && !event_context->space_panning)
{
sp_canvas_item_hide(dc->area);
dc->dragging = FALSE;
double alpha_to_set = setalpha? dc->alpha : 1.0;
// do the actual color setting
sp_desktop_set_color(desktop,
(event->button.state & GDK_MOD1_MASK)?
ColorRGBA(1 - dc->R, 1 - dc->G, 1 - dc->B, alpha_to_set) : ColorRGBA(dc->R, dc->G, dc->B, alpha_to_set),
false, !(event->button.state & GDK_SHIFT_MASK));
// REJON: set aux. toolbar input to hex color!
if (!(sp_desktop_selection(desktop)->isEmpty())) {
sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_DROPPER,
_("Set picked color"));
}
ret = TRUE;
}
break;
case GDK_KEY_PRESS:
switch (get_group0_keyval(&event->key)) {
case GDK_Up:
case GDK_Down:
case GDK_KP_Up:
case GDK_KP_Down:
// prevent the zoom field from activation
if (!MOD__CTRL_ONLY) {
ret = TRUE;
}
break;
case GDK_Escape:
sp_desktop_selection(desktop)->clear();
default:
break;
}
break;
default:
break;
}
if (!ret) {
if (((SPEventContextClass *) parent_class)->root_handler) {
ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
}
}
return ret;
}
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;
}
