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index 026aa4ee00ece0243af2ee8286b6ddedfa0fbee2..07c2649289b128fa9b9657ab3cd171ce4b390251 100644 (file)
*/
#include <glib.h>
+#include <cmath>
#include "display/nr-filter.h"
#include "display/nr-filter-primitive.h"
#include "display/nr-filter-gaussian.h"
#include "display/nr-filter-slot.h"
#include "display/nr-filter-types.h"
+#include "display/pixblock-scaler.h"
+#include "display/pixblock-transform.h"
#include "display/nr-arena-item.h"
#include "libnr/nr-pixblock.h"
#include "libnr/nr-blit.h"
+#include "libnr/nr-matrix.h"
+#include "libnr/nr-scale.h"
#include "svg/svg-length.h"
#include "sp-filter-units.h"
+#if defined (SOLARIS_2_8)
+#include "round.h"
+using Inkscape::round;
+#endif
//#include "display/nr-arena-shape.h"
+__attribute__ ((const))
+inline static int _max4(const double a, const double b,
+ const double c, const double d) {
+ double ret = a;
+ if (b > ret) ret = b;
+ if (c > ret) ret = c;
+ if (d > ret) ret = d;
+ return (int)round(ret);
+}
+
+__attribute__ ((const))
+inline static int _min4(const double a, const double b,
+ const double c, const double d) {
+ double ret = a;
+ if (b < ret) ret = b;
+ if (c < ret) ret = c;
+ if (d < ret) ret = d;
+ return (int)round(ret);
+}
+
namespace NR {
Filter::Filter()
{
- _primitive_count = 1;
+ _primitive_count = 0;
_primitive_table_size = 1;
_primitive = new FilterPrimitive*[1];
- _primitive[0] = new FilterGaussian;
+ _primitive[0] = NULL;
+ //_primitive_count = 1;
+ //_primitive[0] = new FilterGaussian;
_common_init();
}
void Filter::_common_init() {
_slot_count = 1;
+ // Having "not set" here as value means the output of last filter
+ // primitive will be used as output of this filter
_output_slot = NR_FILTER_SLOT_NOT_SET;
+ // These are the default values for filter region,
+ // as specified in SVG standard
+ // NB: SVGLength.set takes prescaled percent values: -.10 means -10%
_region_x.set(SVGLength::PERCENT, -.10, 0);
_region_y.set(SVGLength::PERCENT, -.10, 0);
_region_width.set(SVGLength::PERCENT, 1.20, 0);
_region_height.set(SVGLength::PERCENT, 1.20, 0);
+ // Filter resolution, negative value here stands for "automatic"
_x_pixels = -1.0;
_y_pixels = -1.0;
int Filter::render(NRArenaItem const *item, NRPixBlock *pb)
{
- FilterSlot slot(_slot_count);
+ if(!_primitive[0]) { // if there are no primitives, do nothing
+ return 0;
+ }
+
+ Matrix trans = *item->ctm;
+ Matrix paraller_trans = trans;
+ bool notparaller = false;
+ FilterSlot slot(_slot_count, item);
NRPixBlock *in = new NRPixBlock;
- nr_pixblock_setup_fast(in, pb->mode,
- pb->area.x0, pb->area.y0,
- pb->area.x1, pb->area.y1, true);
- nr_blit_pixblock_pixblock(in, pb);
+
+ // If filter effects region is not paraller to viewport,
+ // we must first undo the rotation / shear.
+ // It will be redone after filtering.
+ // If there is only rotation and uniform scaling (zoom), let's skip this,
+ // as it will not make a difference with gaussian blur.
+ if ((fabs(trans[1]) > 1e-6 || fabs(trans[2]) > 1e-6) &&
+ !(fabs(trans[0] - trans[3]) < 1e-6 && fabs(trans[1] + trans[2]) < 1e-6)) {
+ notparaller = true;
+
+ // TODO: if filter resolution is specified, scaling should be set
+ // according to that
+ double scaling_factor = sqrt(trans.expansionX() * trans.expansionX() +
+ trans.expansionY() * trans.expansionY());
+ scale scaling(scaling_factor, scaling_factor);
+ scale scaling_inv(1.0 / scaling_factor, 1.0 / scaling_factor);
+ trans *= scaling_inv;
+ paraller_trans.set_identity();
+ paraller_trans *= scaling;
+
+ Matrix itrans = trans.inverse();
+ int x0 = pb->area.x0;
+ int y0 = pb->area.y0;
+ int x1 = pb->area.x1;
+ int y1 = pb->area.y1;
+ int min_x = _min4(itrans[0] * x0 + itrans[2] * y0 + itrans[4],
+ itrans[0] * x0 + itrans[2] * y1 + itrans[4],
+ itrans[0] * x1 + itrans[2] * y0 + itrans[4],
+ itrans[0] * x1 + itrans[2] * y1 + itrans[4]);
+ int max_x = _max4(itrans[0] * x0 + itrans[2] * y0 + itrans[4],
+ itrans[0] * x0 + itrans[2] * y1 + itrans[4],
+ itrans[0] * x1 + itrans[2] * y0 + itrans[4],
+ itrans[0] * x1 + itrans[2] * y1 + itrans[4]);
+ int min_y = _min4(itrans[1] * x0 + itrans[3] * y0 + itrans[5],
+ itrans[1] * x0 + itrans[3] * y1 + itrans[5],
+ itrans[1] * x1 + itrans[3] * y0 + itrans[5],
+ itrans[1] * x1 + itrans[3] * y1 + itrans[5]);
+ int max_y = _max4(itrans[1] * x0 + itrans[3] * y0 + itrans[5],
+ itrans[1] * x0 + itrans[3] * y1 + itrans[5],
+ itrans[1] * x1 + itrans[3] * y0 + itrans[5],
+ itrans[1] * x1 + itrans[3] * y1 + itrans[5]);
+
+ nr_pixblock_setup_fast(in, pb->mode,
+ min_x, min_y,
+ max_x, max_y, true);
+ if (in->size != NR_PIXBLOCK_SIZE_TINY && in->data.px == NULL) // memory allocation failed
+ return 0;
+ transform_nearest(in, pb, itrans);
+ } else if (_x_pixels >= 0) {
+ // If filter resolution is not set to automatic, we should
+ // scale the input image to correct resolution
+ /* If filter resolution is zero, the object should not be rendered */
+ if (_x_pixels == 0 || _y_pixels == 0) {
+ int size = (pb->area.x1 - pb->area.x0)
+ * (pb->area.y1 - pb->area.y0)
+ * NR_PIXBLOCK_BPP(pb);
+ memset(NR_PIXBLOCK_PX(pb), 0, size);
+ return 0;
+ }
+ // Resolution is specified as pixel length of our internal buffer.
+ // Though, we might not be rendering the whole object at time,
+ // so we need to calculate the correct pixel size
+ int x_len = (int)round(((pb->area.x1 - pb->area.x0) * _x_pixels) / (item->bbox.x1 - item->bbox.x0));
+ if (x_len < 1) x_len = 1;
+ // If y-resolution is also set, count y-area in the same way as x-area
+ // Otherwise, make y-area so, that aspect ratio of input pixblock and
+ // internal pixblock are the same.
+ int y_len;
+ if (_y_pixels > 0) {
+ y_len = (int)round(((pb->area.y1 - pb->area.y0) * _y_pixels) / (item->bbox.y1 - item->bbox.y0));
+ } else {
+ y_len = (int)round((x_len * (pb->area.y1 - pb->area.y0)) / (double)(pb->area.x1 - pb->area.x0));
+ }
+ if (y_len < 1) y_len = 1;
+ nr_pixblock_setup_fast(in, pb->mode, 0, 0, x_len, y_len, true);
+ if (in->size != NR_PIXBLOCK_SIZE_TINY && in->data.px == NULL) // memory allocation failed
+ return 0;
+ scale_bicubic(in, pb);
+ scale res_scaling(x_len / (double)(pb->area.x1 - pb->area.x0),
+ y_len / (double)(pb->area.y1 - pb->area.y0));
+ paraller_trans *= res_scaling;
+ } else {
+ // If filter resolution is automatic, just make copy of input image
+ nr_pixblock_setup_fast(in, pb->mode,
+ pb->area.x0, pb->area.y0,
+ pb->area.x1, pb->area.y1, true);
+ if (in->size != NR_PIXBLOCK_SIZE_TINY && in->data.px == NULL) // memory allocation failed
+ return 0;
+ nr_blit_pixblock_pixblock(in, pb);
+ }
slot.set(NR_FILTER_SOURCEGRAPHIC, in);
in = NULL; // in is now handled by FilterSlot, we should not touch it
- _primitive[0]->render(slot, *item->ctm);
-
+ // TODO: loop through ALL the primitives and render them one at a time
+ _primitive[0]->render(slot, paraller_trans);
NRPixBlock *out = slot.get(_output_slot);
+ // Clear the pixblock, where the output will be put
+ // -> the original image does not show through
int size = (pb->area.x1 - pb->area.x0)
* (pb->area.y1 - pb->area.y0)
* NR_PIXBLOCK_BPP(pb);
memset(NR_PIXBLOCK_PX(pb), 0, size);
- nr_blit_pixblock_pixblock(pb, out);
+ if (notparaller) {
+ transform_nearest(pb, out, trans);
+ } else if (_x_pixels < 0) {
+ // If the filter resolution is automatic, just copy our final image
+ // to output pixblock, otherwise use bicubic scaling
+ nr_blit_pixblock_pixblock(pb, out);
+ } else {
+ scale_bicubic(pb, out);
+ }
+ // Take note of the amount of used image slots
+ // -> next time this filter is rendered, we can reserve enough slots
+ // immediately
_slot_count = slot.get_slot_count();
return 0;
}
int Filter::get_enlarge(Matrix const &m)
{
+ // Just sum the enlargement factor of all filter elements.
+ // TODO: this both sucks and blows for filters like feOffset
+ // -> ditch this method and design a better one...
int enlarge = 0;
for ( int i = 0 ; i < _primitive_count ; i++ ) {
if(_primitive[i]) enlarge += _primitive[i]->get_enlarge(m);
}
}
+/* Constructor table holds pointers to static methods returning filter
+ * primitives. This table is indexed with FilterPrimitiveType, so that
+ * for example method in _constructor[NR_FILTER_GAUSSIANBLUR]
+ * returns a filter object of type NR::FilterGaussian.
+ */
typedef FilterPrimitive*(*FilterConstructor)();
static FilterConstructor _constructor[NR_FILTER_ENDPRIMITIVETYPE];
void Filter::_create_constructor_table()
{
+ // Constructor table won't change in run-time, so no need to recreate
static bool created = false;
if(created) return;
_constructor[NR_FILTER_SPECULARLIGHTING] = NULL;
_constructor[NR_FILTER_TILE] = NULL;
_constructor[NR_FILTER_TURBULENCE] = NULL;
+ created = true;
}
+/** Helper method for enlarging table of filter primitives. When new
+ * primitives are added, but we have no space for them, this function
+ * makes some more space.
+ */
void Filter::_enlarge_primitive_table() {
FilterPrimitive **new_tbl = new FilterPrimitive*[_primitive_table_size * 2];
for (int i = 0 ; i < _primitive_count ; i++) {
}
_primitive[_primitive_count] = created;
+ _primitive_count++;
return created;
}
_primitive_count = 0;
}
+void Filter::set_x(SVGLength &length)
+{
+ if (length._set)
+ _region_x = length;
+}
+void Filter::set_y(SVGLength &length)
+{
+ if (length._set)
+ _region_y = length;
+}
+void Filter::set_width(SVGLength &length)
+{
+ if (length._set)
+ _region_width = length;
+}
+void Filter::set_height(SVGLength &length)
+{
+ if (length._set)
+ _region_height = length;
+}
+
} /* namespace NR */
/*