static int
sp_spiral_snappoints (SPItem *item, NRPointF *p, int size)
{
#if 0
/* fixme: (Lauris) */
SPSpiral *spiral;
ArtPoint * p, p1, p2, p3;
gdouble affine[6];
spiral = SP_SPIRAL(item);
sp_spiral_get_xy (spiral, 0.0, &p1);
sp_spiral_get_xy (spiral, spiral->t0, &p2);
sp_spiral_get_xy (spiral, 1.0, &p3);
sp_item_i2d_affine (item, affine);
p = g_new (ArtPoint,1);
art_affine_point (p, &p1, affine);
points = g_slist_append (points, p);
p = g_new (ArtPoint,1);
art_affine_point (p, &p2, affine);
points = g_slist_append (points, p);
p = g_new (ArtPoint,1);
art_affine_point (p, &p3, affine);
points = g_slist_append (points, p);
#else
if (((SPItemClass *) parent_class)->snappoints)
return ((SPItemClass *) parent_class)->snappoints (item, p, size);
#endif
return 0;
}
static void
textbox_flip (ItemData *data, gboolean horizontal, SheetPos *center)
{
double affine[6];
ArtPoint src, dst;
Textbox *textbox;
TextboxPriv *priv;
SheetPos b1, b2;
SheetPos textbox_center, delta;
g_return_if_fail (data != NULL);
g_return_if_fail (IS_TEXTBOX (data));
textbox = TEXTBOX (data);
if (center) {
item_data_get_absolute_bbox (ITEM_DATA (textbox), &b1, &b2);
textbox_center.x = b1.x + (b2.x - b1.x) / 2;
textbox_center.y = b1.y + (b2.y - b1.y) / 2;
}
priv = textbox->priv;
if (horizontal)
art_affine_scale (affine, -1, 1);
else
art_affine_scale (affine, 1, -1);
/*
* Let the views (canvas items) know about the rotation.
*/
g_signal_emit_by_name(G_OBJECT (textbox), "flipped", horizontal);
if (center) {
SheetPos textbox_pos;
item_data_get_pos (ITEM_DATA (textbox), &textbox_pos);
src.x = textbox_center.x - center->x;
src.y = textbox_center.y - center->y;
art_affine_point (&dst, &src, affine);
delta.x = -src.x + dst.x;
delta.y = -src.y + dst.y;
item_data_move (ITEM_DATA (textbox), &delta);
}
}
/**
* art_rgb_affine: Affine transform source RGB image and composite.
* @dst: Destination image RGB buffer.
* @x0: Left coordinate of destination rectangle.
* @y0: Top coordinate of destination rectangle.
* @x1: Right coordinate of destination rectangle.
* @y1: Bottom coordinate of destination rectangle.
* @dst_rowstride: Rowstride of @dst buffer.
* @src: Source image RGB buffer.
* @src_width: Width of source image.
* @src_height: Height of source image.
* @src_rowstride: Rowstride of @src buffer.
* @affine: Affine transform.
* @level: Filter level.
* @alphagamma: #ArtAlphaGamma for gamma-correcting the compositing.
*
* Affine transform the source image stored in @src, compositing over
* the area of destination image @dst specified by the rectangle
* (@x0, @y0) - (@x1, @y1). As usual in libart, the left and top edges
* of this rectangle are included, and the right and bottom edges are
* excluded.
*
* The @alphagamma parameter specifies that the alpha compositing be done
* in a gamma-corrected color space. Since the source image is opaque RGB,
* this argument only affects the edges. In the current implementation,
* it is ignored.
*
* The @level parameter specifies the speed/quality tradeoff of the
* image interpolation. Currently, only ART_FILTER_NEAREST is
* implemented.
**/
void
art_rgb_affine (art_u8 *dst, int x0, int y0, int x1, int y1, int dst_rowstride,
const art_u8 *src,
int src_width, int src_height, int src_rowstride,
const double affine[6],
ArtFilterLevel level,
ArtAlphaGamma *alphagamma)
{
/* Note: this is a slow implementation, and is missing all filter
levels other than NEAREST. It is here for clarity of presentation
and to establish the interface. */
int x, y;
double inv[6];
art_u8 *dst_p, *dst_linestart;
const art_u8 *src_p;
ArtPoint pt, src_pt;
int src_x, src_y;
int run_x0, run_x1;
dst_linestart = dst;
art_affine_invert (inv, affine);
for (y = y0; y < y1; y++)
{
pt.y = y + 0.5;
run_x0 = x0;
run_x1 = x1;
art_rgb_affine_run (&run_x0, &run_x1, y, src_width, src_height,
inv);
dst_p = dst_linestart + (run_x0 - x0) * 3;
for (x = run_x0; x < run_x1; x++)
{
pt.x = x + 0.5;
art_affine_point (&src_pt, &pt, inv);
src_x = floor (src_pt.x);
src_y = floor (src_pt.y);
src_p = src + (src_y * src_rowstride) + src_x * 3;
dst_p[0] = src_p[0];
dst_p[1] = src_p[1];
dst_p[2] = src_p[2];
dst_p += 3;
}
dst_linestart += dst_rowstride;
}
}
static double
gnome_canvas_item_invoke_point (GnomeCanvasItem *item, double x, double y, int cx, int cy,
GnomeCanvasItem **actual_item)
{
#ifdef HACKISH_AFFINE
double i2w[6], w2c[6], i2c[6], c2i[6];
ArtPoint c, i;
#endif
#ifdef HACKISH_AFFINE
gnome_canvas_item_i2w_affine (item, i2w);
gnome_canvas_w2c_affine (item->canvas, w2c);
art_affine_multiply (i2c, i2w, w2c);
art_affine_invert (c2i, i2c);
c.x = cx;
c.y = cy;
art_affine_point (&i, &c, c2i);
x = i.x;
y = i.y;
#endif
return (* GNOME_CANVAS_ITEM_CLASS (GTK_OBJECT_GET_CLASS (item))->point) (
item, x, y, cx, cy, actual_item);
}
static void
test_affine (void) {
double src[6];
double dst[6];
double src2[6];
char str[128];
int i;
ArtPoint ps, pd, ptmp;
for (i = 0; i < 6; i++)
{
src[i] = (rand () * 2.0 / RAND_MAX) - 1.0;
src2[i] = (rand () * 2.0 / RAND_MAX) - 1.0;
}
#if 0
src[0] = 0.9999999;
src[1] = -0.000001;
src[2] = 0.000001;
src[3] = 0.9999999;
src[4] = 0;
src[5] = 0;
#if 1
src[0] = 0.98480775;
src[1] = -0.17364818;
src[2] = 0.17364818;
src[3] = 0.98480775;
#endif
src2[0] = 0.98480775;
src2[1] = -0.17364818;
src2[2] = 0.17364818;
src2[3] = 0.98480775;
#endif
ps.x = rand() * 100.0 / RAND_MAX;
ps.y = rand() * 100.0 / RAND_MAX;
art_affine_point (&pd, &ps, src);
art_affine_invert (dst, src);
art_affine_point (&ptmp, &pd, dst);
art_affine_to_string (str, src);
printf ("src = %s\n", str);
art_affine_to_string (str, dst);
printf ("dst = %s\n", str);
printf ("point (%g, %g) -> (%g, %g) -> (%g, %g)\n",
ps.x, ps.y, pd.x, pd.y, ptmp.x, ptmp.y);
art_affine_point (&ptmp, &ps, src);
art_affine_point (&pd, &ptmp, src2);
art_affine_to_string (str, src2);
printf ("src2 = %s\n", str);
printf ("point (%g, %g) -> (%g, %g) -> (%g, %g)\n",
ps.x, ps.y, ptmp.x, ptmp.y, pd.x, pd.y);
art_affine_multiply (dst, src, src2);
art_affine_to_string (str, dst);
printf ("dst = %s\n", str);
art_affine_point (&pd, &ps, dst);
printf ("point (%g, %g) -> (%g, %g)\n",
ps.x, ps.y, pd.x, pd.y);
}
GnomePosGlyphList *
gnome_pgl_from_gl (const GnomeGlyphList * gl, const gdouble * transform, guint flags)
{
static gdouble identity[] = {1.0, 0.0, 0.0, 1.0, 0.0, 0.0};
GnomePosGlyphList * pgl;
gboolean fontfound;
gint allocated_strings;
gint r;
gint cg, cr;
ArtPoint pos, pen;
gboolean usemetrics;
gint lastglyph;
gboolean advance;
ArtPoint letterspace;
gdouble kerning;
GnomeFont * font;
guint32 color;
gboolean needstring;
gint currentstring;
gint sptr;
ArtPoint p;
g_return_val_if_fail (gl != NULL, NULL);
g_return_val_if_fail (GNOME_IS_GLYPHLIST (gl), NULL);
if (!transform)
transform = identity;
/* Special case */
if (gl->g_length < 1) {
pgl = g_new (GnomePosGlyphList, 1);
pgl->glyphs = NULL;
pgl->strings = NULL;
pgl->num_strings = 0;
return pgl;
}
/* We need font rule */
g_return_val_if_fail (gl->r_length > 0, NULL);
g_return_val_if_fail (gl->rules[0].code == GGL_POSITION, NULL);
g_return_val_if_fail (gl->rules[0].value.ival == 0, NULL);
fontfound = FALSE;
for (r = 1; (r < gl->r_length) && (gl->rules[r].code != GGL_POSITION); r++) {
if (gl->rules[r].code == GGL_FONT) {
g_return_val_if_fail (gl->rules[r].value.font != NULL, NULL);
g_return_val_if_fail (GNOME_IS_FONT (gl->rules[r].value.font), NULL);
fontfound = TRUE;
break;
}
}
g_return_val_if_fail (fontfound, NULL);
/* Initialize pgl */
pgl = g_new (GnomePosGlyphList, 1);
pgl->glyphs = g_new (GnomePosGlyph, gl->g_length);
pgl->strings = g_new (GnomePosString, 1);
pgl->num_strings = 0;
allocated_strings = 1;
/* State machine */
sptr = 0;
pen.x = transform[4];
pen.y = transform[5];
usemetrics = FALSE;
lastglyph = -1;
advance = TRUE;
letterspace.x = 0.0;
letterspace.y = 0.0;
kerning = 0.0;
font = NULL;
color = 0x000000ff;
needstring = TRUE;
currentstring = -1;
cr = 0;
for (cg = 0; cg < gl->g_length; cg++) {
/* Collect rules */
while ((cr < gl->r_length) && ((gl->rules[cr].code != GGL_POSITION) || (gl->rules[cr].value.ival <= cg))) {
switch (gl->rules[cr].code) {
case GGL_MOVETOX:
/* moveto is special case */
g_return_val_if_fail (cr + 1 < gl->r_length, NULL);
g_return_val_if_fail (gl->rules[cr + 1].code == GGL_MOVETOY, NULL);
pos.x = gl->rules[cr].value.dval;
pos.y = gl->rules[cr + 1].value.dval;
cr += 1;
usemetrics = FALSE;
art_affine_point (&pen, &pos, transform);
break;
case GGL_RMOVETOX:
/* rmoveto is special case */
g_return_val_if_fail (cr + 1 < gl->r_length, NULL);
g_return_val_if_fail (gl->rules[cr + 1].code == GGL_RMOVETOY, NULL);
pos.x = gl->rules[cr].value.dval;
pos.y = gl->rules[cr + 1].value.dval;
cr += 1;
usemetrics = FALSE;
pen.x += pos.x * transform[0] + pos.y * transform[2];
pen.y += pos.x * transform[1] + pos.y * transform[3];
break;
case GGL_ADVANCE:
advance = gl->rules[cr].value.bval;
break;
case GGL_LETTERSPACE:
p.x = gl->rules[cr].value.dval;
p.y = 0.0;
letterspace.x = p.x * transform[0] + p.y * transform[2];
letterspace.y = p.x * transform[1] + p.y * transform[3];
break;
case GGL_KERNING:
kerning = gl->rules[cr].value.dval;
break;
case GGL_FONT:
font = gl->rules[cr].value.font;
g_return_val_if_fail (font != NULL, NULL);
g_return_val_if_fail (GNOME_IS_FONT (font), NULL);
needstring = TRUE;
break;
case GGL_COLOR:
color = gl->rules[cr].value.color;
needstring = TRUE;
break;
}
cr += 1;
}
if (needstring) {
/* Add new string instance */
g_assert (GNOME_IS_FONT (font));
if (pgl->num_strings >= allocated_strings) {
allocated_strings += 4;
pgl->strings = g_renew (GnomePosString, pgl->strings, allocated_strings);
}
currentstring = pgl->num_strings;
pgl->num_strings += 1;
pgl->strings[currentstring].start = cg;
pgl->strings[currentstring].length = 0;
pgl->strings[currentstring].rfont = gnome_font_get_rfont (font, transform);
pgl->strings[currentstring].color = color;
needstring = FALSE;
}
/* Rules are parsed and currentstring points to active string */
/* Process glyph */
pgl->glyphs[cg].glyph = gl->glyphs[cg];
pgl->strings[currentstring].length += 1;
if (usemetrics && (lastglyph > 0) && (pgl->glyphs[cg].glyph > 0)) {
/* Need to add kerning */
if (gnome_rfont_get_glyph_stdkerning (pgl->strings[currentstring].rfont, lastglyph, pgl->glyphs[cg].glyph, &p)) {
pen.x += p.x;
pen.y += p.y;
}
pen.x += letterspace.x;
pen.y += letterspace.y;
}
pgl->glyphs[cg].x = pen.x;
pgl->glyphs[cg].y = pen.y;
if (advance) {
if (gnome_rfont_get_glyph_stdadvance (pgl->strings[currentstring].rfont, pgl->glyphs[cg].glyph, &p)) {
pen.x += p.x;
pen.y += p.y;
}
}
usemetrics = TRUE;
lastglyph = pgl->glyphs[cg].glyph;
}
return pgl;
}
static void
relation_arrow_draw (GnomeCanvasItem *item,
GdkDrawable *drawable,
gint x,
gint y,
gint width,
gint height)
{
PlannerRelationArrow *arrow;
PlannerRelationArrowPriv *priv;
#ifdef USE_AFFINE
gdouble i2c[6];
ArtPoint i1, i2, c1, c2;
#else
gdouble i2w_dx;
gdouble i2w_dy;
gdouble dx1, dy1, dx2, dy2;
#endif
gint cx1, cy1, cx2, cy2;
GdkGC *gc;
GdkPoint points[4];
gint i;
arrow = PLANNER_RELATION_ARROW (item);
priv = arrow->priv;
gc = gdk_gc_new (drawable);
gdk_gc_set_line_attributes (gc,
1,
GDK_LINE_SOLID,
GDK_CAP_BUTT,
GDK_JOIN_MITER);
/* Silence warning. */
cx1 = 0;
cy1 = 0;
cx2 = 0;
cy2 = 0;
#ifdef USE_AFFINE
/* Get item area in canvas coordinates. */
gnome_canvas_item_i2c_affine (item, i2c);
#endif
for (i = 0; i < priv->num_points - 1; i++) {
#ifdef USE_AFFINE
i1.x = priv->points[i].x;
i1.y = priv->points[i].y;
i2.x = priv->points[i+1].x;
i2.y = priv->points[i+1].y;
art_affine_point (&c1, &i1, i2c);
art_affine_point (&c2, &i2, i2c);
cx1 = floor (c1.x + 0.5) - x;
cy1 = floor (c1.y + 0.5) - y;
cx2 = floor (c2.x + 0.5) - x;
cy2 = floor (c2.y + 0.5) - y;
#else
i2w_dx = 0.0;
i2w_dy = 0.0;
gnome_canvas_item_i2w (item, &i2w_dx, &i2w_dy);
dx1 = priv->points[i].x;
dy1 = priv->points[i].y;
dx2 = priv->points[i+1].x;
dy2 = priv->points[i+1].y;
gnome_canvas_w2c (item->canvas,
dx1 + i2w_dx,
dy1 + i2w_dy,
&cx1,
&cy1);
gnome_canvas_w2c (item->canvas,
dx2 + i2w_dx,
dy2 + i2w_dy,
&cx2,
&cy2);
cx1 -= x;
cy1 -= y;
cx2 -= x;
cy2 -= y;
#endif
gdk_draw_line (drawable,
gc,
cx1,
cy1,
cx2,
cy2);
}
relation_arrow_setup_arrow (priv->arrow_dir,
points,
cx1,
cy1,
cx2,
cy2);
gdk_draw_polygon (drawable,
gc,
TRUE,
(GdkPoint *) &points,
4);
g_object_unref (gc);
}