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gdk: Add gdk_cairo_pixbuf_to_surface

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This commit is contained in:
Alexander Larsson
2013-06-24 12:12:43 +02:00
parent e1ed8b50de
commit d9abadbcee
2 changed files with 45 additions and 23 deletions
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65
gdk/gdkcairo.c
View File

@@ -176,24 +176,18 @@ gdk_cairo_region (cairo_t *cr,
}
/**
* gdk_cairo_set_source_pixbuf:
* @cr: a cairo context
* gdk_cairo_pixbuf_to_surface:
* @pixbuf: a #GdkPixbuf
* @pixbuf_x: X coordinate of location to place upper left corner of @pixbuf
* @pixbuf_y: Y coordinate of location to place upper left corner of @pixbuf
* @for_window: The window this will be drawn to, on %NULL.
*
* Sets the given pixbuf as the source pattern for @cr.
* Creates an image surface with the same contents as
* the pixbuf.
*
* The pattern has an extend mode of %CAIRO_EXTEND_NONE and is aligned
* so that the origin of @pixbuf is @pixbuf_x, @pixbuf_y.
*
* Since: 2.8
* Since: 3.10
*/
void
gdk_cairo_set_source_pixbuf (cairo_t *cr,
const GdkPixbuf *pixbuf,
gdouble pixbuf_x,
gdouble pixbuf_y)
cairo_surface_t *
gdk_cairo_pixbuf_to_surface (const GdkPixbuf *pixbuf,
GdkWindow *for_window)
{
gint width = gdk_pixbuf_get_width (pixbuf);
gint height = gdk_pixbuf_get_height (pixbuf);
@@ -204,7 +198,6 @@ gdk_cairo_set_source_pixbuf (cairo_t *cr,
guchar *cairo_pixels;
cairo_format_t format;
cairo_surface_t *surface;
static const cairo_user_data_key_t key;
int j;
if (n_channels == 3)
@@ -212,14 +205,13 @@ gdk_cairo_set_source_pixbuf (cairo_t *cr,
else
format = CAIRO_FORMAT_ARGB32;
cairo_stride = cairo_format_stride_for_width (format, width);
cairo_pixels = g_malloc (height * cairo_stride);
surface = cairo_image_surface_create_for_data ((unsigned char *)cairo_pixels,
format,
width, height, cairo_stride);
cairo_surface_set_user_data (surface, &key,
cairo_pixels, (cairo_destroy_func_t)g_free);
surface =
gdk_window_create_similar_image_surface (for_window,
format,
width, height,
1);
cairo_stride = cairo_image_surface_get_stride (surface);
cairo_pixels = cairo_image_surface_get_data (surface);
for (j = height; j; j--)
{
@@ -277,6 +269,33 @@ gdk_cairo_set_source_pixbuf (cairo_t *cr,
cairo_pixels += cairo_stride;
}
cairo_surface_mark_dirty (surface);
return surface;
}
/**
* gdk_cairo_set_source_pixbuf:
* @cr: a cairo context
* @pixbuf: a #GdkPixbuf
* @pixbuf_x: X coordinate of location to place upper left corner of @pixbuf
* @pixbuf_y: Y coordinate of location to place upper left corner of @pixbuf
*
* Sets the given pixbuf as the source pattern for @cr.
*
* The pattern has an extend mode of %CAIRO_EXTEND_NONE and is aligned
* so that the origin of @pixbuf is @pixbuf_x, @pixbuf_y.
*
* Since: 2.8
*/
void
gdk_cairo_set_source_pixbuf (cairo_t *cr,
const GdkPixbuf *pixbuf,
gdouble pixbuf_x,
gdouble pixbuf_y)
{
cairo_surface_t *surface;
surface = gdk_cairo_pixbuf_to_surface (pixbuf, NULL);
cairo_set_source_surface (cr, surface, pixbuf_x, pixbuf_y);
cairo_surface_destroy (surface);
}

3
gdk/gdkcairo.h
View File

@@ -71,6 +71,9 @@ cairo_surface_t * gdk_cairo_surface_create_similar (cairo_surface_t *surface,
cairo_content_t content,
int width,
int height);
GDK_AVAILABLE_IN_3_10
cairo_surface_t * gdk_cairo_pixbuf_to_surface (const GdkPixbuf *pixbuf,
GdkWindow *for_window);
G_END_DECLS