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[cairo-meta-surface] Add _cairo_meta_surface_get_path()

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Which generates the path for each cairo operation.  If there's any paint,
mask, or intersect-clip-path operations in the meta-surface, UNSUPPORTED
is returned.

Strokes are currently tesselated to traps, then traps converted to path.
Should be made to use stroke_to_path() when we implement that.
This commit is contained in:
Behdad Esfahbod 2008-05-09 15:32:57 +02:00
parent 674cba89fe
commit 08334be905
3 changed files with 80 additions and 2 deletions
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4
src/cairo-meta-surface-private.h
View file

@ -159,6 +159,10 @@ _cairo_meta_surface_create (cairo_content_t content,
int width_pixels,
int height_pixels);
cairo_private cairo_int_status_t
_cairo_meta_surface_get_path (cairo_surface_t *surface,
cairo_path_fixed_t *path);
cairo_private cairo_status_t
_cairo_meta_surface_replay (cairo_surface_t *surface,
cairo_surface_t *target);

71
src/cairo-meta-surface.c
View file

@ -652,6 +652,77 @@ _cairo_command_get_path (cairo_command_t *command)
return NULL;
}
cairo_int_status_t
_cairo_meta_surface_get_path (cairo_surface_t *surface,
cairo_path_fixed_t *path)
{
cairo_meta_surface_t *meta;
cairo_command_t *command, **elements;
int i, num_elements;
cairo_int_status_t status;
if (surface->status)
return surface->status;
meta = (cairo_meta_surface_t *) surface;
status = CAIRO_STATUS_SUCCESS;
num_elements = meta->commands.num_elements;
elements = _cairo_array_index (&meta->commands, 0);
for (i = meta->replay_start_idx; i < num_elements; i++) {
command = elements[i];
switch (command->header.type) {
case CAIRO_COMMAND_PAINT:
case CAIRO_COMMAND_MASK:
case CAIRO_COMMAND_INTERSECT_CLIP_PATH:
status = CAIRO_INT_STATUS_UNSUPPORTED;
break;
case CAIRO_COMMAND_STROKE:
{
cairo_traps_t traps;
_cairo_traps_init (&traps);
/* XXX call cairo_stroke_to_path() when that is implemented */
status = _cairo_path_fixed_stroke_to_traps (&command->stroke.path,
&command->stroke.style,
&command->stroke.ctm,
&command->stroke.ctm_inverse,
command->stroke.tolerance,
&traps);
if (status == CAIRO_STATUS_SUCCESS)
status = _cairo_traps_path (&traps, path);
_cairo_traps_fini (&traps);
break;
}
case CAIRO_COMMAND_FILL:
{
status = _cairo_path_fixed_append (path, &command->fill.path, CAIRO_DIRECTION_FORWARD);
break;
}
case CAIRO_COMMAND_SHOW_GLYPHS:
{
status = _cairo_scaled_font_glyph_path (command->show_glyphs.scaled_font,
command->show_glyphs.glyphs,
command->show_glyphs.num_glyphs,
path);
break;
}
default:
ASSERT_NOT_REACHED;
}
if (status)
break;
}
return _cairo_surface_set_error (surface, status);
}
static cairo_status_t
_cairo_meta_surface_replay_internal (cairo_surface_t *surface,
cairo_surface_t *target,

7
src/cairo.c
View file

@ -1827,7 +1827,8 @@ cairo_rectangle (cairo_t *cr,
cairo_close_path (cr);
}
/* XXX: NYI
#if 0
/* XXX: NYI */
void
cairo_stroke_to_path (cairo_t *cr)
{
@ -1836,11 +1837,13 @@ cairo_stroke_to_path (cairo_t *cr)
if (cr->status)
return;
/* The code in _cairo_meta_surface_get_path has a poorman's stroke_to_path */
status = _cairo_gstate_stroke_path (cr->gstate);
if (status)
_cairo_set_error (cr, status);
}
*/
#endif
/**
* cairo_close_path: