void
eda_cairo_arc (cairo_t *cr, int flags,
double width, double x, double y,
double radius, double start_angle, double sweep_angle)
{
int s_width;
double x1, y1, x2, y2;
double s_x, s_y, s_radius;
double offset, dummy = 0;
if (!(flags & EDA_CAIRO_ENABLE_HINTS)) {
do_arc (cr, x, y, radius, start_angle, sweep_angle);
return;
}
WORLDtoSCREEN (cr, x - radius, y + radius, &x1, &y1);
WORLDtoSCREEN (cr, x + radius, y - radius, &x2, &y2);
s_width = screen_width (cr, width);
offset = ((s_width % 2) == 0) ? 0 : 0.5;
s_x = (double)(x1 + x2) / 2.;
s_y = (double)(y1 + y2) / 2.;
s_radius = (double)(y2 - y1) / 2.;
cairo_device_to_user (cr, &s_x, &s_y);
cairo_device_to_user_distance (cr, &offset, &dummy);
cairo_device_to_user_distance (cr, &s_radius, &dummy);
do_arc (cr, s_x + offset, s_y + offset,
s_radius, start_angle, sweep_angle);
}
void
eda_cairo_box (cairo_t *cr, int flags, double line_width,
double x1, double y1, double x2, double y2)
{
int s_line_width;
double s_x1, s_y1, s_x2, s_y2;
double offset;
if (!(flags & EDA_CAIRO_ENABLE_HINTS)) {
cairo_rectangle (cr, x1, y1, (x2 - x1), (y2 - y1));
return;
}
WORLDtoSCREEN (cr, x1, y1, &s_x1, &s_y1);
WORLDtoSCREEN (cr, x2, y2, &s_x2, &s_y2);
s_line_width = screen_width (cr, line_width);
offset = (line_width == -1 || (s_line_width % 2) == 0) ? 0 : 0.5;
/* Allow filled boxes (inferred from line_width == -1)
* to touch an extra pixel, so the filled span is inclusive */
if (line_width == -1) {
if (s_x1 > s_x2) s_x1 += 1; else s_x2 += 1;
if (s_y1 > s_y2) s_y1 += 1; else s_y2 += 1;
}
s_x1 += offset; s_y1 += offset;
s_x2 += offset; s_y2 += offset;
cairo_device_to_user (cr, &s_x1, &s_y1);
cairo_device_to_user (cr, &s_x2, &s_y2);
cairo_move_to (cr, s_x2, s_y2);
cairo_line_to (cr, s_x1, s_y2);
cairo_line_to (cr, s_x1, s_y1);
cairo_line_to (cr, s_x2, s_y1);
cairo_close_path (cr);
}
void gschem_cairo_arc (GSCHEM_TOPLEVEL *w_current,
int width, int x, int y,
int radius, int start_angle, int end_angle)
{
int s_width;
int x1, y1, x2, y2;
double s_x, s_y, s_radius;
double offset;
WORLDtoSCREEN (w_current, x - radius, y + radius, &x1, &y1);
WORLDtoSCREEN (w_current, x + radius, y - radius, &x2, &y2);
s_width = screen_width (w_current, width);
offset = ((s_width % 2) == 0) ? 0 : 0.5;
s_x = (double)(x1 + x2) / 2.;
s_y = (double)(y1 + y2) / 2.;
s_radius = (double)(y2 - y1) / 2.;
cairo_save (w_current->cr);
cairo_translate (w_current->cr, s_x + offset, s_y + offset);
/* Adjust for non-uniform X/Y scale factor. Note that the + 1
allows for the case where x2 == x1 or y2 == y1 */
cairo_scale (w_current->cr, (double)(x2 - x1 + 1) /
(double)(y2 - y1 + 1), 1.);
do_arc (w_current->cr, 0., 0., (double) s_radius, start_angle, end_angle);
cairo_restore (w_current->cr);
}
void gschem_cairo_box (GSCHEM_TOPLEVEL *w_current, int line_width,
int x1, int y1, int x2, int y2)
{
int s_line_width;
int s_x1, s_y1, s_x2, s_y2;
double offset;
WORLDtoSCREEN (w_current, x1, y1, &s_x1, &s_y1);
WORLDtoSCREEN (w_current, x2, y2, &s_x2, &s_y2);
s_line_width = screen_width (w_current, line_width);
offset = (line_width == -1 || (s_line_width % 2) == 0) ? 0 : 0.5;
/* Allow filled boxes (inferred from line_width == -1)
* to touch an extra pixel, so the filled span is inclusive */
if (line_width == -1) {
if (x1 > x2) x1 += 1; else x2 += 1;
if (y1 > y2) y1 += 1; else y2 += 1;
}
cairo_move_to (w_current->cr, s_x2 + offset, s_y2 + offset);
cairo_line_to (w_current->cr, s_x1 + offset, s_y2 + offset);
cairo_line_to (w_current->cr, s_x1 + offset, s_y1 + offset);
cairo_line_to (w_current->cr, s_x2 + offset, s_y1 + offset);
cairo_close_path (w_current->cr);
}
/*! \todo Finish function documentation
* \brief
* \par Function Description
*/
void o_line_invalidate_rubber (GSCHEM_TOPLEVEL *w_current)
{
int x1, y1, x2, y2;
WORLDtoSCREEN (w_current, w_current->first_wx, w_current->first_wy, &x1, &y1);
WORLDtoSCREEN (w_current, w_current->second_wx, w_current->second_wy, &x2, &y2);
o_invalidate_rect (w_current, x1, y1, x2, y2);
}
void gschem_cairo_line (GSCHEM_TOPLEVEL *w_current, int line_end,
int w_line_width,
int w_x1, int w_y1, int w_x2, int w_y2)
{
int x1, y1, x2, y2, line_width;
double offset;
double xoffset = 0;
double yoffset = 0;
int horizontal = 0;
int vertical = 0;
WORLDtoSCREEN (w_current, w_x1, w_y1, &x1, &y1);
WORLDtoSCREEN (w_current, w_x2, w_y2, &x2, &y2);
line_width = screen_width (w_current, w_line_width);
offset = ((line_width % 2) == 0) ? 0 : 0.5;
if (y1 == y2) horizontal = 1;
if (x1 == x2) vertical = 1;
/* Hint so the length of the line runs along a pixel boundary */
if (horizontal)
yoffset = offset;
else if (vertical)
xoffset = offset;
else
xoffset = yoffset = offset;
/* Now hint the ends of the lines */
switch (line_end) {
case END_NONE:
/* Line terminates at the passed coordinate */
/* Add an extra pixel to give an inclusive span */
if (horizontal) {
if (x1 > x2) x1 += 1; else x2 += 1;
} else if (vertical) {
if (y1 > y2) y1 += 1; else y2 += 1;
}
break;
case END_SQUARE:
case END_ROUND:
/* Line terminates half a width away from the passed coordinate */
if (horizontal) {
xoffset = offset;
} else if (vertical) {
yoffset = offset;
}
break;
}
cairo_move_to (w_current->cr, x1 + xoffset, y1 + yoffset);
cairo_line_to (w_current->cr, x2 + xoffset, y2 + yoffset);
}
/*! \brief Invalidate bounding box or outline for OBJECT placement
*
* \par Function Description
* This function invalidates the bounding box where objects would be
* drawn by o_place_draw_rubber()
*
* The function applies manhatten mode constraints to the coordinates
* before drawing if the CONTROL key is recording as being pressed in
* the w_current structure.
*
* The "drawing" parameter is used to indicate if this drawing should
* immediately use the selected feedback mode and positioning constraints.
*
* With drawing=TRUE, the selected conditions are used immediately,
* otherwise the conditions from the last drawing operation are used,
* saving the new state for next time.
*
* This function should be called with drawing=TRUE when starting a
* rubberbanding operation and when otherwise refreshing the rubberbanded
* outline (e.g. after a screen redraw). For any undraw operation, should
* be called with drawing=FALSE, ensuring that the undraw XOR matches the
* mode and constraints of the corresponding "draw" operation.
*
* If any mode / constraint changes are made between a undraw, redraw XOR
* pair, the latter (draw) operation must be called with drawing=TRUE. If
* no mode / constraint changes were made between the pair, it is not
* harmful to call the draw operation with "drawing=FALSE".
*
* \param [in] w_current GSCHEM_TOPLEVEL which we're drawing for.
* \param [in] drawing Set to FALSE for undraw operations to ensure
* matching conditions to a previous draw operation.
*/
void o_place_invalidate_rubber (GSCHEM_TOPLEVEL *w_current, int drawing)
{
TOPLEVEL *toplevel = w_current->toplevel;
int diff_x, diff_y;
int left, top, bottom, right;
int s_left, s_top, s_bottom, s_right;
g_return_if_fail (toplevel->page_current->place_list != NULL);
/* If drawing is true, then don't worry about the previous drawing
* method and movement constraints, use with the current settings */
if (drawing) {
/* Ensure we set this to flag there is "something" supposed to be
* drawn when the invaliate call below causes an expose event. */
w_current->last_drawb_mode = w_current->actionfeedback_mode;
w_current->drawbounding_action_mode = (w_current->CONTROLKEY)
? CONSTRAINED : FREE;
}
/* Calculate delta of X-Y positions from buffer's origin */
diff_x = w_current->second_wx - w_current->first_wx;
diff_y = w_current->second_wy - w_current->first_wy;
/* Adjust the coordinates according to the movement constraints */
/* Need to update the w_current->{first,second}_w{x,y} coords even
* though we're only invalidating because the move rubberband code
* (which may execute right after this function) expects these
* coordinates to be correct.
*/
if (w_current->drawbounding_action_mode == CONSTRAINED) {
if (abs (diff_x) >= abs (diff_y)) {
w_current->second_wy = w_current->first_wy;
diff_y = 0;
} else {
w_current->second_wx = w_current->first_wx;
diff_x = 0;
}
}
/* Find the bounds of the drawing to be done */
world_get_object_glist_bounds (toplevel, toplevel->page_current->place_list,
&left, &top, &right, &bottom);
WORLDtoSCREEN (w_current, left + diff_x, top + diff_y, &s_left, &s_top);
WORLDtoSCREEN (w_current, right + diff_x, bottom + diff_y, &s_right, &s_bottom);
o_invalidate_rect (w_current, s_left, s_top, s_right, s_bottom);
}
/*! \todo Finish function documentation!!!
* \brief
* \par Function Description
*
*/
void o_net_invalidate_rubber (GSCHEM_TOPLEVEL *w_current)
{
TOPLEVEL *toplevel = w_current->toplevel;
int size = 0, magnetic_halfsize;
int bloat;
int magnetic_x, magnetic_y;
int first_x, first_y, third_x, third_y, second_x, second_y;
int x1, y1, x2, y2;
WORLDtoSCREEN (w_current, w_current->magnetic_wx, w_current->magnetic_wy,
&magnetic_x, &magnetic_y);
WORLDtoSCREEN (w_current, w_current->first_wx, w_current->first_wy,
&first_x, &first_y);
WORLDtoSCREEN (w_current, w_current->third_wx, w_current->third_wy,
&third_x, &third_y);
WORLDtoSCREEN (w_current, w_current->second_wx, w_current->second_wy,
&second_x, &second_y);
if (toplevel->net_style == THICK) {
size = SCREENabs (w_current, NET_WIDTH);
}
size = max (size, 0);
bloat = size / 2;
if (w_current->magneticnet_mode) {
if (w_current->magnetic_wx != -1 && w_current->magnetic_wy != -1) {
magnetic_halfsize = max (4 * size, MAGNETIC_HALFSIZE);
o_invalidate_rect (w_current, magnetic_x - magnetic_halfsize,
magnetic_y - magnetic_halfsize,
magnetic_x + magnetic_halfsize,
magnetic_y + magnetic_halfsize);
}
}
x1 = min (first_x, second_x) - bloat;
x2 = max (first_x, second_x) + bloat;
y1 = min (first_y, second_y) - bloat;
y2 = max (first_y, second_y) + bloat;
o_invalidate_rect (w_current, x1, y1, x2, y2);
x1 = min (second_x, third_x) - bloat;
x2 = max (second_x, third_x) + bloat;
y1 = min (second_y, third_y) - bloat;
y2 = max (second_y, third_y) + bloat;
o_invalidate_rect (w_current, x1, y1, x2, y2);
}
/*! \todo Finish function documentation!!!
* \brief
* \par Function Description
*/
void o_pin_invalidate_rubber (GSCHEM_TOPLEVEL *w_current)
{
TOPLEVEL *toplevel = w_current->toplevel;
int x1, y1, x2, y2;
int min_x, min_y, max_x, max_y;
int bloat = 0;
WORLDtoSCREEN (w_current, w_current->first_wx, w_current->first_wy, &x1, &y1);
WORLDtoSCREEN (w_current, w_current->second_wx, w_current->second_wy, &x2, &y2);
/* Pins are always first created as net pins, use net pin width */
if (toplevel->net_style == THICK ) {
bloat = SCREENabs (w_current, PIN_WIDTH_NET) / 2;
}
min_x = min (x1, x2) - bloat;
max_x = max (x1, x2) + bloat;
min_y = min (y1, y2) - bloat;
max_y = max (y1, y2) + bloat;
o_invalidate_rect (w_current, min_x, min_y, max_x, max_y);
}
void
eda_cairo_center_arc (cairo_t *cr, int flags,
double center_width,
double line_width, double x, double y,
double radius, double start_angle, double sweep_angle)
{
int s_center_width, s_line_width;
double s_x, s_y, dummy = 0;
int s_diameter;
double even_center_width;
double even_line_width;
double even_diameter;
double center_offset;
double s_radius;
int do_radius_hint = TRUE;
if (!(flags & EDA_CAIRO_ENABLE_HINTS)) {
do_arc (cr, x, y, radius, start_angle, sweep_angle);
return;
}
WORLDtoSCREEN (cr, x, y, &s_x, &s_y);
s_diameter = SCREENabs (cr, 2 * radius);
even_diameter = ((s_diameter % 2) == 0);
s_radius = (double) s_diameter / 2.;
/* Switch off radius hinting for small radii. If we don't, then we get
* a very abrupt transition once the arc reaches a single pixel size. */
if (s_radius <= 1.) do_radius_hint = FALSE;
/* Hint the center of the arc based on where a line
* of thickness center_width (world) would drawn */
s_center_width = screen_width (cr, center_width);
even_center_width = (center_width == -1 || (s_center_width % 2) == 0);
center_offset = even_center_width ? 0. : 0.5;
/* Hint the radius to land its extermity on the pixel grid */
s_line_width = screen_width (cr, line_width);
even_line_width = (line_width == -1 || (s_line_width % 2) == 0);
if (do_radius_hint)
s_radius += ((even_center_width ==
even_line_width) == even_diameter) ? 0. : 0.5;
s_x += center_offset;
s_y += center_offset;
cairo_device_to_user (cr, &s_x, &s_y);
cairo_device_to_user_distance (cr, &s_radius, &dummy);
do_arc (cr, s_x, s_y, s_radius, start_angle, sweep_angle);
}
void gschem_cairo_center_arc (GSCHEM_TOPLEVEL *w_current,
int center_width,
int line_width, int x, int y,
int radius, int start_angle, int end_angle)
{
int s_center_width, s_line_width;
int s_x, s_y, s_diameter;
int even_center_width;
int even_line_width;
int even_diameter;
double center_offset;
double s_radius;
int do_radius_hint = TRUE;
WORLDtoSCREEN (w_current, x, y, &s_x, &s_y);
s_diameter = SCREENabs (w_current, 2 * radius);
even_diameter = ((s_diameter % 2) == 0);
s_radius = (double) s_diameter / 2.;
/* Switch off radius hinting for small radii. If we don't, then we get
* a very abrupt transition once the arc reaches a single pixel size. */
if (s_radius <= 1.) do_radius_hint = FALSE;
/* Hint the center of the arc based on where a line
* of thickness center_width (world) would drawn */
s_center_width = screen_width (w_current, center_width);
even_center_width = (center_width == -1 || (s_center_width % 2) == 0);
center_offset = even_center_width ? 0. : 0.5;
/* Hint the radius to land its extermity on the pixel grid */
s_line_width = screen_width (w_current, line_width);
even_line_width = (line_width == -1 || (s_line_width % 2) == 0);
if (do_radius_hint)
s_radius += ((even_center_width ==
even_line_width) == even_diameter) ? 0. : 0.5;
do_arc (w_current->cr, (double) s_x + center_offset,
(double) s_y + center_offset,
(double) s_radius,
start_angle, end_angle);
}
void
eda_cairo_line (cairo_t *cr, int flags, int line_end,
double w_line_width,
double w_x1, double w_y1, double w_x2, double w_y2)
{
double x1, y1, x2, y2;
int line_width;
double offset;
double xoffset = 0;
double yoffset = 0;
double horizontal = 0;
double vertical = 0;
if (!(flags & EDA_CAIRO_ENABLE_HINTS)) {
cairo_move_to (cr, w_x1, w_y1);
cairo_line_to (cr, w_x2, w_y2);
return;
}
WORLDtoSCREEN (cr, w_x1, w_y1, &x1, &y1);
WORLDtoSCREEN (cr, w_x2, w_y2, &x2, &y2);
line_width = screen_width (cr, w_line_width);
offset = ((line_width % 2) == 0) ? 0 : 0.5;
if (y1 == y2) horizontal = 1;
if (x1 == x2) vertical = 1;
/* Hint so the length of the line runs along a pixel boundary */
if (horizontal)
yoffset = offset;
else if (vertical)
xoffset = offset;
else
xoffset = yoffset = offset;
/* Now hint the ends of the lines */
switch (line_end) {
case END_NONE:
/* Line terminates at the passed coordinate */
/* Add an extra pixel to give an inclusive span */
if (horizontal) {
if (x1 > x2) x1 += 1; else x2 += 1;
} else if (vertical) {
if (y1 > y2) y1 += 1; else y2 += 1;
}
break;
case END_SQUARE:
case END_ROUND:
/* Line terminates half a width away from the passed coordinate */
if (horizontal) {
xoffset = offset;
} else if (vertical) {
yoffset = offset;
}
break;
}
x1 += xoffset; y1 += yoffset;
x2 += xoffset; y2 += yoffset;
cairo_device_to_user (cr, &x1, &y1);
cairo_device_to_user (cr, &x2, &y2);
cairo_move_to (cr, x1, y1);
cairo_line_to (cr, x2, y2);
}
void
eda_cairo_center_box (cairo_t *cr, int flags,
double center_width,
double line_width, double x, double y,
double half_width, double half_height)
{
int s_center_width, s_line_width;
int s_width, s_height;
double s_half_width, s_half_height;
double s_x, s_y;
double even_center_width;
double even_line_width;
double even_width, even_height;
double x1, y1, x2, y2;
double center_offset;
int do_width_hint = TRUE;
int do_height_hint = TRUE;
if (!(flags & EDA_CAIRO_ENABLE_HINTS)) {
cairo_rectangle (cr, (x - half_width), (y - half_height),
2*half_width, 2*half_height);
return;
}
WORLDtoSCREEN (cr, x, y, &s_x, &s_y);
s_width = SCREENabs (cr, 2 * half_width);
s_height = SCREENabs (cr, 2 * half_height);
even_width = (s_width % 2 == 0);
even_height = (s_width % 2 == 0);
s_half_width = (double) s_width / 2.;
s_half_height = (double) s_height / 2.;
#if 0 /* Not as nice an effect as with arcs */
/* Switch off radius hinting for small radii. If we don't, then we get
* a very abrupt transition once the box reaches a single pixel size. */
if (s_half_width <= 1.) do_width_hint = FALSE;
if (s_half_height <= 1.) do_height_hint = FALSE;
#endif
/* Hint the center of the box based on where a line
* of thickness center_width (world) would drawn */
s_center_width = screen_width (cr, center_width);
even_center_width = (center_width == -1 || (s_center_width % 2) == 0);
center_offset = even_center_width ? 0. : 0.5;
/* Hint the half-widths to land the stroke on the pixel grid */
s_line_width = screen_width (cr, line_width);
even_line_width = (line_width == -1 || (s_line_width % 2) == 0);
if (do_width_hint)
s_half_width += ((even_center_width ==
even_line_width) == even_width ) ? 0. : 0.5;
if (do_height_hint)
s_half_height += ((even_center_width ==
even_line_width) == even_height) ? 0. : 0.5;
x1 = (double) s_x + center_offset - s_half_width;
y1 = (double) s_y + center_offset - s_half_height;
x2 = (double) s_x + center_offset + s_half_width;
y2 = (double) s_y + center_offset + s_half_height;
/* Allow filled boxes (inferred from line_width == -1)
* to touch an extra pixel, so the filled span is inclusive */
if (line_width == -1) {
x2 += 1; y2 += 1;
}
cairo_device_to_user (cr, &x1, &y1);
cairo_device_to_user (cr, &x2, &y2);
cairo_move_to (cr, x2, y2);
cairo_line_to (cr, x1, y2);
cairo_line_to (cr, x1, y1);
cairo_line_to (cr, x2, y1);
cairo_close_path (cr);
}
void gschem_cairo_center_box (GSCHEM_TOPLEVEL *w_current,
int center_width,
int line_width, int x, int y,
int half_width, int half_height)
{
int s_center_width, s_line_width;
int s_width, s_height;
double s_half_width, s_half_height;
int s_x, s_y;
int even_center_width;
int even_line_width;
int even_width, even_height;
double x1, y1, x2, y2;
double center_offset;
int do_width_hint = TRUE;
int do_height_hint = TRUE;
WORLDtoSCREEN (w_current, x, y, &s_x, &s_y);
s_width = SCREENabs (w_current, 2 * half_width);
s_height = SCREENabs (w_current, 2 * half_height);
even_width = (s_width % 2 == 0);
even_height = (s_width % 2 == 0);
s_half_width = (double) s_width / 2.;
s_half_height = (double) s_height / 2.;
#if 0 /* Not as nice an effect as with arcs */
/* Switch off radius hinting for small radii. If we don't, then we get
* a very abrupt transition once the box reaches a single pixel size. */
if (s_half_width <= 1.) do_width_hint = FALSE;
if (s_half_height <= 1.) do_height_hint = FALSE;
#endif
/* Hint the center of the box based on where a line
* of thickness center_width (world) would drawn */
s_center_width = screen_width (w_current, center_width);
even_center_width = (center_width == -1 || (s_center_width % 2) == 0);
center_offset = even_center_width ? 0. : 0.5;
/* Hint the half-widths to land the stroke on the pixel grid */
s_line_width = screen_width (w_current, line_width);
even_line_width = (line_width == -1 || (s_line_width % 2) == 0);
if (do_width_hint)
s_half_width += ((even_center_width ==
even_line_width) == even_width ) ? 0. : 0.5;
if (do_height_hint)
s_half_height += ((even_center_width ==
even_line_width) == even_height) ? 0. : 0.5;
x1 = (double) s_x + center_offset - s_half_width;
y1 = (double) s_y + center_offset - s_half_height;
x2 = (double) s_x + center_offset + s_half_width;
y2 = (double) s_y + center_offset + s_half_height;
/* Allow filled boxes (inferred from line_width == -1)
* to touch an extra pixel, so the filled span is inclusive */
if (line_width == -1) {
x2 += 1; y2 += 1;
}
cairo_move_to (w_current->cr, x2, y2);
cairo_line_to (w_current->cr, x1, y2);
cairo_line_to (w_current->cr, x1, y1);
cairo_line_to (w_current->cr, x2, y1);
cairo_close_path (w_current->cr);
}