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Make gdk_pixbuf_get_from_surface() accept negative src_x,y coordinates

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This commit is contained in:
Kristian Rietveld 2010-10-19 14:05:24 +02:00
parent 046ca498de
commit 6e4643de14
1 changed files with 7 additions and 11 deletions
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18
gdk/gdkpixbuf-drawable.c
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@ -118,25 +118,21 @@ gdk_cairo_format_for_content (cairo_content_t content)
static cairo_surface_t *
gdk_cairo_surface_coerce_to_image (cairo_surface_t *surface,
cairo_content_t content,
int src_x,
int src_y,
int width,
int height)
{
cairo_surface_t *copy;
cairo_t *cr;
if (cairo_surface_get_type (surface) == CAIRO_SURFACE_TYPE_IMAGE &&
cairo_surface_get_content (surface) == content &&
cairo_image_surface_get_width (surface) >= width &&
cairo_image_surface_get_height (surface) >= height)
return cairo_surface_reference (surface);
copy = cairo_image_surface_create (gdk_cairo_format_for_content (content),
width,
height);
cr = cairo_create (copy);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_set_source_surface (cr, surface, -src_x, -src_y);
cairo_paint (cr);
cairo_destroy (cr);
@ -242,7 +238,6 @@ gdk_pixbuf_get_from_surface (cairo_surface_t *surface,
/* General sanity checks */
g_return_val_if_fail (surface != NULL, NULL);
g_return_val_if_fail (src_x >= 0 && src_y >= 0, NULL);
g_return_val_if_fail (width > 0 && height > 0, NULL);
content = cairo_surface_get_content (surface) | CAIRO_CONTENT_COLOR;
@ -251,7 +246,8 @@ gdk_pixbuf_get_from_surface (cairo_surface_t *surface,
8,
width, height);
surface = gdk_cairo_surface_coerce_to_image (surface, content, src_x + width, src_y + height);
surface = gdk_cairo_surface_coerce_to_image (surface, content, src_x, src_y,
width, height);
cairo_surface_flush (surface);
if (cairo_surface_status (surface) || dest == NULL)
{
@ -264,14 +260,14 @@ gdk_pixbuf_get_from_surface (cairo_surface_t *surface,
gdk_pixbuf_get_rowstride (dest),
cairo_image_surface_get_data (surface),
cairo_image_surface_get_stride (surface),
src_x, src_y,
0, 0,
width, height);
else
convert_no_alpha (gdk_pixbuf_get_pixels (dest),
gdk_pixbuf_get_rowstride (dest),
cairo_image_surface_get_data (surface),
cairo_image_surface_get_stride (surface),
src_x, src_y,
0, 0,
width, height);
cairo_surface_destroy (surface);