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Implement fallback for clone_similar

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This commit is contained in:
Vladimir Vukicevic 2007-08-27 16:30:52 -07:00
parent 19fa097f51
commit 69dae7ee4a
3 changed files with 56 additions and 1 deletions
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10
src/cairo-surface-fallback-private.h
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@ -1,3 +1,4 @@
/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
/* cairo - a vector graphics library with display and print output
*
* Copyright © 2002 University of Southern California
@ -116,4 +117,13 @@ _cairo_surface_fallback_composite_trapezoids (cairo_operator_t op,
cairo_trapezoid_t *traps,
int num_traps);
cairo_private cairo_status_t
_cairo_surface_fallback_clone_similar (cairo_surface_t *surface,
cairo_surface_t *src,
int src_x,
int src_y,
int width,
int height,
cairo_surface_t **clone_out);
#endif

41
src/cairo-surface-fallback.c
View file

@ -1,3 +1,4 @@
/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
/* cairo - a vector graphics library with display and print output
*
* Copyright © 2002 University of Southern California
@ -1252,3 +1253,43 @@ _cairo_surface_fallback_composite_trapezoids (cairo_operator_t op,
return status;
}
cairo_status_t
_cairo_surface_fallback_clone_similar (cairo_surface_t *surface,
cairo_surface_t *src,
int src_x,
int src_y,
int width,
int height,
cairo_surface_t **clone_out)
{
cairo_status_t status;
cairo_pattern_union_t src_pattern;
cairo_surface_t *new_surface = NULL;
new_surface = _cairo_surface_create_similar_scratch (surface,
cairo_surface_get_content (src),
width, height);
if (new_surface->status)
return new_surface->status;
_cairo_pattern_init_for_surface (&src_pattern.surface, src);
status = _cairo_surface_composite (CAIRO_OPERATOR_SOURCE,
&src_pattern.base,
NULL,
new_surface,
src_x, src_y,
0, 0,
0, 0,
width, height);
_cairo_pattern_fini (&src_pattern.base);
if (status == CAIRO_STATUS_SUCCESS)
*clone_out = new_surface;
else
cairo_surface_destroy (new_surface);
return status;
}

6
src/cairo-surface.c
View file

@ -1032,7 +1032,11 @@ _cairo_surface_clone_similar (cairo_surface_t *surface,
return CAIRO_STATUS_SURFACE_FINISHED;
if (surface->backend->clone_similar == NULL)
return CAIRO_INT_STATUS_UNSUPPORTED;
return (cairo_int_status_t)
_cairo_surface_fallback_clone_similar (surface, src,
src_x, src_y,
width, height,
clone_out);
status = surface->backend->clone_similar (surface, src, src_x, src_y,
width, height, clone_out);