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libgimpwidgets: port gimppreviewarea from deprecated gdk to cairo 

Backported from the gtk3-port branch.
This commit is contained in:
Mikael Magnusson 2010-12-17 22:24:56 +01:00
parent 44ceeb246e
commit 644a272f19
1 changed files with 19 additions and 19 deletions
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38
libgimpwidgets/gimppreviewarea.c
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@ -231,8 +231,9 @@ gimp_preview_area_expose (GtkWidget *widget,
{
GimpPreviewArea *area = GIMP_PREVIEW_AREA (widget);
GtkAllocation allocation;
GdkPixbuf *pixbuf;
GdkRectangle rect;
GdkRectangle render;
cairo_t *cr;
if (! area->buf)
return FALSE;
@ -244,25 +245,24 @@ gimp_preview_area_expose (GtkWidget *widget,
rect.width = area->width;
rect.height = area->height;
if (gdk_rectangle_intersect (&rect, &event->area, &render))
{
GtkStyle *style = gtk_widget_get_style (widget);
gint x = render.x - rect.x;
gint y = render.y - rect.y;
guchar *buf = area->buf + x * 3 + y * area->rowstride;
gdk_draw_rgb_image_dithalign (gtk_widget_get_window (widget),
style->fg_gc[gtk_widget_get_state (widget)],
render.x,
render.y,
render.width,
render.height,
GDK_RGB_DITHER_MAX,
buf,
pixbuf = gdk_pixbuf_new_from_data (area->buf,
GDK_COLORSPACE_RGB,
FALSE,
8,
rect.width,
rect.height,
area->rowstride,
area->offset_x - render.x,
area->offset_y - render.y);
}
NULL, NULL);
cr = gdk_cairo_create (gtk_widget_get_window (widget));
gdk_cairo_region (cr, event->region);
cairo_clip (cr);
gdk_cairo_set_source_pixbuf (cr, pixbuf, rect.x, rect.y);
cairo_paint (cr);
cairo_destroy (cr);
g_object_unref (pixbuf);
return FALSE;
}