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[cairo-xlib-surface] Implement create_solid_pattern_surface

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If render is disabled, this will create a surface the size of the
dither pattern and paint it with dithering.
This commit is contained in:
Behdad Esfahbod 2008-06-13 21:37:45 -04:00
parent fb8f2b3854
commit abac0f96cb
1 changed files with 73 additions and 3 deletions
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76
src/cairo-xlib-surface.c
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@ -1161,6 +1161,75 @@ _cairo_xlib_surface_clone_similar (void *abstract_surface,
return CAIRO_INT_STATUS_UNSUPPORTED;
}
static cairo_surface_t *
_cairo_xlib_surface_create_solid_pattern_surface (void *abstract_surface,
cairo_solid_pattern_t *solid_pattern)
{
/* This function's only responsibility is to create a proper surface
* for when XRender is not available. The proper surface is a xlib
* surface (as opposed to image surface which is what create_similar
* returns in those cases) and the size of the dithering pattern, not
* 1x1. This surface can then be used in
* _cairo_xlib_surface_solid_fill_rectangles() to do dithered "solid"
* fills using core protocol */
cairo_xlib_surface_t *other = abstract_surface;
cairo_image_surface_t *image;
cairo_xlib_surface_t *surface = NULL;
cairo_status_t status = CAIRO_STATUS_SUCCESS;
Pixmap pixmap;
if (CAIRO_SURFACE_RENDER_HAS_COMPOSITE (other))
return NULL;
image = (cairo_image_surface_t *)
_cairo_image_surface_create_with_content (solid_pattern->content,
ARRAY_LENGTH (dither_pattern[0]),
ARRAY_LENGTH (dither_pattern));
status = image->base.status;
if (status)
goto BAIL;
pixmap = XCreatePixmap (other->dpy,
other->drawable,
image->width, image->height,
other->depth);
surface = (cairo_xlib_surface_t *)
cairo_xlib_surface_create (other->dpy,
pixmap,
other->visual,
image->width, image->height);
status = surface->base.status;
if (status)
goto BAIL;
surface->owns_pixmap = TRUE;
status = _cairo_surface_paint (&image->base, CAIRO_OPERATOR_SOURCE, &solid_pattern->base);
if (status)
goto BAIL;
status = _draw_image_surface (surface, image,
0, 0,
image->width, image->height,
0, 0);
if (status)
goto BAIL;
BAIL:
cairo_surface_destroy (&image->base);
if (status && surface) {
XFreePixmap (other->dpy, pixmap);
cairo_surface_destroy (&surface->base);
surface = NULL;
}
return (cairo_surface_t *) surface;
}
static cairo_status_t
_cairo_xlib_surface_set_matrix (cairo_xlib_surface_t *surface,
cairo_matrix_t *matrix)
@ -2260,10 +2329,11 @@ static const cairo_surface_backend_t cairo_xlib_surface_backend = {
NULL, /* stroke */
NULL, /* fill */
_cairo_xlib_surface_show_glyphs,
NULL, /* snapshot */
NULL, /* snapshot */
_cairo_xlib_surface_is_similar,
_cairo_xlib_surface_reset
_cairo_xlib_surface_reset,
NULL, /* fill_stroke */
_cairo_xlib_surface_create_solid_pattern_surface
};
/**