boost::optional<Geom::Point> Line::intersection_with_viewbox (SPDesktop *desktop)
{
Geom::Rect vb = desktop->get_display_area();
/* remaining viewbox corners */
Geom::Point ul (vb.min()[Geom::X], vb.max()[Geom::Y]);
Geom::Point lr (vb.max()[Geom::X], vb.min()[Geom::Y]);
std::pair <Geom::Point, Geom::Point> e = side_of_intersection (vb.min(), lr, vb.max(), ul, this->pt, this->v_dir);
if (e.first == e.second) {
// perspective line lies outside the canvas
return boost::optional<Geom::Point>();
}
Line line (e.first, e.second);
return this->intersect (line);
}
Geom::Affine
sp_gradient_get_g2d_matrix(SPGradient const *gr, Geom::Affine const &ctm, Geom::Rect const &bbox)
{
if (gr->getUnits() == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX) {
return ( Geom::Scale(bbox.dimensions())
* Geom::Translate(bbox.min())
* Geom::Affine(ctm) );
} else {
return ctm;
}
}
void FilterFlood::render_cairo(FilterSlot &slot)
{
cairo_surface_t *input = slot.getcairo(_input);
double r = SP_RGBA32_R_F(color);
double g = SP_RGBA32_G_F(color);
double b = SP_RGBA32_B_F(color);
double a = opacity;
#if defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
if (icc) {
guchar ru, gu, bu;
icc_color_to_sRGB(icc, &ru, &gu, &bu);
r = SP_COLOR_U_TO_F(ru);
g = SP_COLOR_U_TO_F(gu);
b = SP_COLOR_U_TO_F(bu);
}
#endif
cairo_surface_t *out = ink_cairo_surface_create_same_size(input, CAIRO_CONTENT_COLOR_ALPHA);
// Get filter primitive area in user units
Geom::Rect fp = filter_primitive_area( slot.get_units() );
// Convert to Cairo units
Geom::Rect fp_cairo = fp * slot.get_units().get_matrix_user2pb();
// Get area in slot (tile to fill)
Geom::Rect sa = slot.get_slot_area();
// Get overlap
Geom::OptRect optoverlap = intersect( fp_cairo, sa );
if( optoverlap ) {
Geom::Rect overlap = *optoverlap;
double dx = fp_cairo.min()[Geom::X] - sa.min()[Geom::X];
double dy = fp_cairo.min()[Geom::Y] - sa.min()[Geom::Y];
if( dx < 0.0 ) dx = 0.0;
if( dy < 0.0 ) dy = 0.0;
cairo_t *ct = cairo_create(out);
cairo_set_source_rgba(ct, r, g, b, a);
cairo_set_operator(ct, CAIRO_OPERATOR_SOURCE);
cairo_rectangle(ct, dx, dy, overlap.width(), overlap.height() );
cairo_fill(ct);
cairo_destroy(ct);
}
slot.set(_output, out);
cairo_surface_destroy(out);
}
/**
* Given a Geom::Rect that may, for example, correspond to the bbox of an object,
* this function fits the canvas to that rect by resizing the canvas
* and translating the document root into position.
*/
void SPDocument::fitToRect(Geom::Rect const &rect)
{
double const w = rect.width();
double const h = rect.height();
double const old_height = sp_document_height(this);
SPUnit const &px(sp_unit_get_by_id(SP_UNIT_PX));
sp_document_set_width(this, w, &px);
sp_document_set_height(this, h, &px);
Geom::Translate const tr(Geom::Point(0, (old_height - h))
- to_2geom(rect.min()));
SP_GROUP(root)->translateChildItems(tr);
SPNamedView *nv = sp_document_namedview(this, 0);
if(nv) {
Geom::Translate tr2(-rect.min());
nv->translateGuides(tr2);
// update the viewport so the drawing appears to stay where it was
nv->scrollAllDesktops(-tr2[0], tr2[1], false);
}
}
void
sp_gradient_set_gs2d_matrix(SPGradient *gr, Geom::Affine const &ctm,
Geom::Rect const &bbox, Geom::Affine const &gs2d)
{
gr->gradientTransform = gs2d * ctm.inverse();
if (gr->getUnits() == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX ) {
gr->gradientTransform = ( gr->gradientTransform
* Geom::Translate(-bbox.min())
* Geom::Scale(bbox.dimensions()).inverse() );
}
gr->gradientTransform_set = TRUE;
gr->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
void FilterTile::render_cairo(FilterSlot &slot)
{
// FIX ME!
static bool tile_warning = false;
if (!tile_warning) {
g_warning("Renderer for feTile has non-optimal implementation, expect slowness and bugs.");
tile_warning = true;
}
// Fixing isn't so easy as the Inkscape renderer breaks the canvas into "rendering" tiles for
// faster rendering. (The "rendering" tiles are not the same as the tiles in this primitive.)
// Only if the the feTile tile source falls inside the current "rendering" tile will the tile
// image be available.
// This input source contains only the "rendering" tile.
cairo_surface_t *in = slot.getcairo(_input);
// For debugging
// static int i = 0;
// ++i;
// std::stringstream filename;
// filename << "dump." << i << ".png";
// cairo_surface_write_to_png( in, filename.str().c_str() );
// This is the feTile source area as determined by the input primitive area (see SVG spec).
Geom::Rect tile_area = slot.get_primitive_area(_input);
if( tile_area.width() == 0.0 || tile_area.height() == 0.0 ) {
slot.set(_output, in);
std::cerr << "FileTile::render_cairo: tile has zero width or height" << std::endl;
} else {
cairo_surface_t *out = ink_cairo_surface_create_identical(in);
// color_interpolation_filters for out same as in.
copy_cairo_surface_ci(in, out);
cairo_t *ct = cairo_create(out);
// The rectangle of the "rendering" tile.
Geom::Rect sa = slot.get_slot_area();
Geom::Affine trans = slot.get_units().get_matrix_user2pb();
// Create feTile tile ----------------
// Get tile area in pixbuf units (tile transformed).
Geom::Rect tt = tile_area * trans;
// Shift between "rendering" tile and feTile tile
Geom::Point shift = sa.min() - tt.min();
// Create feTile tile surface
cairo_surface_t *tile = cairo_surface_create_similar(in, cairo_surface_get_content(in),
tt.width(), tt.height());
cairo_t *ct_tile = cairo_create(tile);
cairo_set_source_surface(ct_tile, in, shift[Geom::X], shift[Geom::Y]);
cairo_paint(ct_tile);
// Paint tiles ------------------
// For debugging
// std::stringstream filename;
// filename << "tile." << i << ".png";
// cairo_surface_write_to_png( tile, filename.str().c_str() );
// Determine number of feTile rows and columns
Geom::Rect pr = filter_primitive_area( slot.get_units() );
int tile_cols = ceil( pr.width() / tile_area.width() );
int tile_rows = ceil( pr.height() / tile_area.height() );
// Do tiling (TO DO: restrict to slot area.)
for( int col=0; col < tile_cols; ++col ) {
for( int row=0; row < tile_rows; ++row ) {
Geom::Point offset( col*tile_area.width(), row*tile_area.height() );
offset *= trans;
offset[Geom::X] -= trans[4];
offset[Geom::Y] -= trans[5];
cairo_set_source_surface(ct, tile, offset[Geom::X], offset[Geom::Y]);
cairo_paint(ct);
}
}
slot.set(_output, out);
// Clean up
cairo_destroy(ct);
cairo_surface_destroy(out);
cairo_destroy(ct_tile);
cairo_surface_destroy(tile);
}
}
/**
* Creates a surface with the given logical and physical extents.
* When a drawing context is created for this surface, its pixels
* will cover the area under the given rectangle. IT will contain
* the number of pixels specified by the second argument.
* @param logbox Logical extents of the surface
* @param pixdims Pixel dimensions of the surface.
*/
DrawingSurface::DrawingSurface(Geom::Rect const &logbox, Geom::IntPoint const &pixdims)
: _surface(NULL)
, _origin(logbox.min())
, _scale(pixdims[X] / logbox.width(), pixdims[Y] / logbox.height())
, _pixels(pixdims)
{}
std::vector<Geom::Point> Layout::createSelectionShape(iterator const &it_start, iterator const &it_end, Geom::Affine const &transform) const
{
std::vector<Geom::Point> quads;
unsigned char_index;
unsigned end_char_index;
if (it_start._char_index < it_end._char_index) {
char_index = it_start._char_index;
end_char_index = it_end._char_index;
} else {
char_index = it_end._char_index;
end_char_index = it_start._char_index;
}
for ( ; char_index < end_char_index ; ) {
if (_characters[char_index].in_glyph == -1) {
char_index++;
continue;
}
double char_rotation = _glyphs[_characters[char_index].in_glyph].rotation;
unsigned span_index = _characters[char_index].in_span;
Geom::Point top_left, bottom_right;
if (_path_fitted || char_rotation != 0.0) {
Geom::Rect box = characterBoundingBox(iterator(this, char_index), &char_rotation);
top_left = box.min();
bottom_right = box.max();
char_index++;
} else { // for straight text we can be faster by combining all the character boxes in a span into one box
double span_x = _spans[span_index].x_start + _spans[span_index].chunk(this).left_x;
top_left[Geom::X] = span_x + _characters[char_index].x;
while (char_index < end_char_index && _characters[char_index].in_span == span_index)
char_index++;
if (char_index == _characters.size() || _characters[char_index].in_span != span_index)
bottom_right[Geom::X] = _spans[span_index].x_end + _spans[span_index].chunk(this).left_x;
else
bottom_right[Geom::X] = span_x + _characters[char_index].x;
double baseline_y = _spans[span_index].line(this).baseline_y + _spans[span_index].baseline_shift;
double vertical_scale = _glyphs.back().vertical_scale;
if (_directions_are_orthogonal(_blockProgression(), TOP_TO_BOTTOM)) {
double span_height = vertical_scale * (_spans[span_index].line_height.ascent + _spans[span_index].line_height.descent);
top_left[Geom::Y] = top_left[Geom::X];
top_left[Geom::X] = baseline_y - span_height * 0.5;
bottom_right[Geom::Y] = bottom_right[Geom::X];
bottom_right[Geom::X] = baseline_y + span_height * 0.5;
} else {
top_left[Geom::Y] = baseline_y - vertical_scale * _spans[span_index].line_height.ascent;
bottom_right[Geom::Y] = baseline_y + vertical_scale * _spans[span_index].line_height.descent;
}
}
Geom::Rect char_box(top_left, bottom_right);
if (char_box.dimensions()[Geom::X] == 0.0 || char_box.dimensions()[Geom::Y] == 0.0)
continue;
Geom::Point center_of_rotation((top_left[Geom::X] + bottom_right[Geom::X]) * 0.5,
top_left[Geom::Y] + _spans[span_index].line_height.ascent);
Geom::Affine total_transform = Geom::Translate(-center_of_rotation) * Geom::Rotate(char_rotation) * Geom::Translate(center_of_rotation) * transform;
for(int i = 0; i < 4; i ++)
quads.push_back(char_box.corner(i) * total_transform);
}
return quads;
}
void FilterImage::render_cairo(FilterSlot &slot)
{
if (!feImageHref)
return;
//cairo_surface_t *input = slot.getcairo(_input);
// Viewport is filter primitive area (in user coordinates).
// Note: viewport calculation in non-trivial. Do not rely
// on get_matrix_primitiveunits2pb().
Geom::Rect vp = filter_primitive_area( slot.get_units() );
slot.set_primitive_area(_output, vp); // Needed for tiling
double feImageX = vp.min()[Geom::X];
double feImageY = vp.min()[Geom::Y];
double feImageWidth = vp.width();
double feImageHeight = vp.height();
// feImage is suppose to use the same parameters as a normal SVG image.
// If a width or height is set to zero, the image is not suppose to be displayed.
// This does not seem to be what Firefox or Opera does, nor does the W3C displacement
// filter test expect this behavior. If the width and/or height are zero, we use
// the width and height of the object bounding box.
Geom::Affine m = slot.get_units().get_matrix_user2filterunits().inverse();
Geom::Point bbox_00 = Geom::Point(0,0) * m;
Geom::Point bbox_w0 = Geom::Point(1,0) * m;
Geom::Point bbox_0h = Geom::Point(0,1) * m;
double bbox_width = Geom::distance(bbox_00, bbox_w0);
double bbox_height = Geom::distance(bbox_00, bbox_0h);
if( feImageWidth == 0 ) feImageWidth = bbox_width;
if( feImageHeight == 0 ) feImageHeight = bbox_height;
// Internal image, like <use>
if (from_element) {
if (!SVGElem) return;
// TODO: do not recreate the rendering tree every time
// TODO: the entire thing is a hack, we should give filter primitives an "update" method
// like the one for DrawingItems
document->ensureUpToDate();
Drawing drawing;
Geom::OptRect optarea = SVGElem->visualBounds();
if (!optarea) return;
unsigned const key = SPItem::display_key_new(1);
DrawingItem *ai = SVGElem->invoke_show(drawing, key, SP_ITEM_SHOW_DISPLAY);
if (!ai) {
g_warning("feImage renderer: error creating DrawingItem for SVG Element");
return;
}
drawing.setRoot(ai);
Geom::Rect area = *optarea;
Geom::Affine user2pb = slot.get_units().get_matrix_user2pb();
/* FIXME: These variables are currently unused. Why were they calculated?
double scaleX = feImageWidth / area.width();
double scaleY = feImageHeight / area.height();
*/
Geom::Rect sa = slot.get_slot_area();
cairo_surface_t *out = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
sa.width(), sa.height());
Inkscape::DrawingContext dc(out, sa.min());
dc.transform(user2pb); // we are now in primitive units
dc.translate(feImageX, feImageY);
// dc.scale(scaleX, scaleY); No scaling should be done
Geom::IntRect render_rect = area.roundOutwards();
// dc.translate(render_rect.min()); This seems incorrect
// Update to renderable state
drawing.update(render_rect);
drawing.render(dc, render_rect);
SVGElem->invoke_hide(key);
// For the moment, we'll assume that any image is in sRGB color space
set_cairo_surface_ci(out, SP_CSS_COLOR_INTERPOLATION_SRGB);
slot.set(_output, out);
cairo_surface_destroy(out);
return;
}
// External image, like <image>
if (!image && !broken_ref) {
broken_ref = true;
/* TODO: If feImageHref is absolute, then use that (preferably handling the
* case that it's not a file URI). Otherwise, go up the tree looking
* for an xml:base attribute, and use that as the base URI for resolving
* the relative feImageHref URI. Otherwise, if document->base is valid,
* then use that as the base URI. Otherwise, use feImageHref directly
* (i.e. interpreting it as relative to our current working directory).
* (See http://www.w3.org/TR/xmlbase/#resolution .) */
gchar *fullname = feImageHref;
if ( !g_file_test( fullname, G_FILE_TEST_EXISTS ) ) {
// Try to load from relative postion combined with document base
if( document ) {
fullname = g_build_filename( document->getBase(), feImageHref, NULL );
}
}
if ( !g_file_test( fullname, G_FILE_TEST_EXISTS ) ) {
// Should display Broken Image png.
g_warning("FilterImage::render: Can not find: %s", feImageHref );
return;
}
image = Inkscape::Pixbuf::create_from_file(fullname);
if( fullname != feImageHref ) g_free( fullname );
if ( !image ) {
g_warning("FilterImage::render: failed to load image: %s", feImageHref);
return;
}
broken_ref = false;
}
if (broken_ref) {
return;
}
cairo_surface_t *image_surface = image->getSurfaceRaw();
Geom::Rect sa = slot.get_slot_area();
cairo_surface_t *out = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
sa.width(), sa.height());
// For the moment, we'll assume that any image is in sRGB color space
// set_cairo_surface_ci(out, SP_CSS_COLOR_INTERPOLATION_SRGB);
// This seemed like a sensible thing to do but it breaks filters-displace-01-f.svg
cairo_t *ct = cairo_create(out);
cairo_translate(ct, -sa.min()[Geom::X], -sa.min()[Geom::Y]);
// now ct is in pb coordinates, note the feWidth etc. are in user units
ink_cairo_transform(ct, slot.get_units().get_matrix_user2pb());
// now ct is in the coordinates of feImageX etc.
// Now that we have the viewport, we must map image inside.
// Partially copied from sp-image.cpp.
// Do nothing if preserveAspectRatio is "none".
if( aspect_align != SP_ASPECT_NONE ) {
// Check aspect ratio of image vs. viewport
double feAspect = feImageHeight/feImageWidth;
double aspect = (double)image->height()/(double)image->width();
bool ratio = (feAspect < aspect);
double ax, ay; // Align side
switch( aspect_align ) {
case SP_ASPECT_XMIN_YMIN:
ax = 0.0;
ay = 0.0;
break;
case SP_ASPECT_XMID_YMIN:
ax = 0.5;
ay = 0.0;
break;
case SP_ASPECT_XMAX_YMIN:
ax = 1.0;
ay = 0.0;
break;
case SP_ASPECT_XMIN_YMID:
ax = 0.0;
ay = 0.5;
break;
case SP_ASPECT_XMID_YMID:
ax = 0.5;
ay = 0.5;
break;
case SP_ASPECT_XMAX_YMID:
ax = 1.0;
ay = 0.5;
break;
case SP_ASPECT_XMIN_YMAX:
ax = 0.0;
ay = 1.0;
break;
case SP_ASPECT_XMID_YMAX:
ax = 0.5;
ay = 1.0;
break;
case SP_ASPECT_XMAX_YMAX:
ax = 1.0;
ay = 1.0;
break;
default:
ax = 0.0;
ay = 0.0;
break;
}
if( aspect_clip == SP_ASPECT_SLICE ) {
// image clipped by viewbox
if( ratio ) {
// clip top/bottom
feImageY -= ay * (feImageWidth * aspect - feImageHeight);
feImageHeight = feImageWidth * aspect;
} else {
// clip sides
feImageX -= ax * (feImageHeight / aspect - feImageWidth);
feImageWidth = feImageHeight / aspect;
}
} else {
// image fits into viewbox
if( ratio ) {
// fit to height
feImageX += ax * (feImageWidth - feImageHeight / aspect );
feImageWidth = feImageHeight / aspect;
} else {
// fit to width
feImageY += ay * (feImageHeight - feImageWidth * aspect);
feImageHeight = feImageWidth * aspect;
}
}
}
double scaleX = feImageWidth / image->width();
double scaleY = feImageHeight / image->height();
cairo_translate(ct, feImageX, feImageY);
cairo_scale(ct, scaleX, scaleY);
cairo_set_source_surface(ct, image_surface, 0, 0);
cairo_paint(ct);
cairo_destroy(ct);
slot.set(_output, out);
}
int main(int argc, char **argv) {
char const *const filename = (argc >= 2
? argv[1]
: "toy.svgd");
FILE* f = fopen(filename, "r");
if (!f) {
perror(filename);
return 1;
}
display_path = read_svgd(f);
Geom::Rect r = display_path.bbox();
display_path = display_path*Geom::translate(-r.min());
Geom::scale sc(r.max() - r.min());
display_path = display_path*(sc.inverse()*Geom::scale(500,500));
gtk_init (&argc, &argv);
gdk_rgb_init();
GtkWidget* window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_title(GTK_WINDOW(window), "text toy");
gtk_window_set_policy(GTK_WINDOW(window), TRUE, TRUE, TRUE);
gtk_signal_connect(GTK_OBJECT(window),
"delete_event",
GTK_SIGNAL_FUNC(delete_event_cb),
NULL);
gtk_widget_push_visual(gdk_rgb_get_visual());
gtk_widget_push_colormap(gdk_rgb_get_cmap());
canvas = gtk_drawing_area_new();
gtk_signal_connect(GTK_OBJECT (canvas),
"expose_event",
GTK_SIGNAL_FUNC(expose_event),
0);
gtk_widget_add_events(canvas, (GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_KEY_PRESS_MASK |
GDK_POINTER_MOTION_MASK));
gtk_signal_connect(GTK_OBJECT (canvas),
"button_press_event",
GTK_SIGNAL_FUNC(mouse_event),
0);
gtk_signal_connect(GTK_OBJECT (canvas),
"button_release_event",
GTK_SIGNAL_FUNC(mouse_release_event),
0);
gtk_signal_connect(GTK_OBJECT (canvas),
"motion_notify_event",
GTK_SIGNAL_FUNC(mouse_motion_event),
0);
gtk_signal_connect(GTK_OBJECT(canvas),
"key_press_event",
GTK_SIGNAL_FUNC(key_release_event),
0);
gtk_widget_pop_colormap();
gtk_widget_pop_visual();
GtkWidget *vb = gtk_vbox_new(0, 0);
gtk_container_add(GTK_CONTAINER(window), vb);
gtk_box_pack_start(GTK_BOX(vb), canvas, TRUE, TRUE, 0);
gtk_window_set_default_size(GTK_WINDOW(window), 600, 600);
gtk_widget_show_all(window);
dash_gc = gdk_gc_new(canvas->window);
gint8 dash_list[] = {4, 4};
gdk_gc_set_dashes(dash_gc, 0, dash_list, 2);
GdkColor colour;
colour.red = 0xffff;
colour.green = 0xffff;
colour.blue = 0xffff;
plain_gc = gdk_gc_new(canvas->window);
//gdk_gc_set_rgb_fg_color(dash_gc, &colour);
gdk_rgb_find_color(gtk_widget_get_colormap(canvas), &colour);
gdk_window_set_background(canvas->window, &colour);
gdk_gc_set_line_attributes(dash_gc, 1, GDK_LINE_ON_OFF_DASH,
GDK_CAP_BUTT,GDK_JOIN_MITER);
/* Make sure the canvas can receive key press events. */
GTK_WIDGET_SET_FLAGS(canvas, GTK_CAN_FOCUS);
assert(GTK_WIDGET_CAN_FOCUS(canvas));
gtk_widget_grab_focus(canvas);
assert(gtk_widget_is_focus(canvas));
gtk_main();
return 0;
}