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Improve previous change for tool bar image support on GTK+2 with cairo

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* src/gtkutil.c (xg_get_pixbuf_from_surface) [USE_CAIRO && !HAVE_GTK3]: Remove
unused argument f.  All callers changed.  Handle general alpha value.
This commit is contained in:
YAMAMOTO Mitsuharu 2019-05-29 10:43:01 +09:00
parent 146486f8a6
commit 09dce0fd39
1 changed files with 16 additions and 11 deletions
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27
src/gtkutil.c
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@ -281,7 +281,7 @@ xg_get_pixbuf_from_pix_and_mask (struct frame *f,
#if defined USE_CAIRO && !defined HAVE_GTK3
static GdkPixbuf *
xg_get_pixbuf_from_surface (struct frame *f, cairo_surface_t *surface)
xg_get_pixbuf_from_surface (cairo_surface_t *surface)
{
int width = cairo_image_surface_get_width (surface);
int height = cairo_image_surface_get_height (surface);
@ -306,15 +306,20 @@ xg_get_pixbuf_from_surface (struct frame *f, cairo_surface_t *surface)
for (int x = 0; x < width; x++)
{
guint32 argb = ((guint32 *) pixels)[x];
#ifdef WORDS_BIGENDIAN
/* ARGB -> RGBA (gdk_pixbuf, big endian) */
((guint32 *) pixels)[x] = (argb << 8) | (argb >> 24);
#else /* !WORDS_BIGENDIAN */
/* ARGB -> ABGR (gdk_pixbuf, little endian) */
((guint32 *) pixels)[x] = (( argb & 0xff00ff00)
| ((argb << 16) & 0x00ff0000)
| ((argb >> 16) & 0x000000ff));
#endif /* !WORDS_BIGENDIAN */
int alpha = argb >> 24;
if (alpha == 0)
((guint32 *) pixels)[x] = 0;
else
{
int red = (argb >> 16) & 0xff, green = (argb >> 8) & 0xff;
int blue = argb & 0xff;
pixels[x * 4 ] = red * 0xff / alpha;
pixels[x * 4 + 1] = green * 0xff / alpha;
pixels[x * 4 + 2] = blue * 0xff / alpha;
pixels[x * 4 + 3] = alpha;
}
}
pixels += rowstride;
}
@ -399,7 +404,7 @@ xg_get_image_for_pixmap (struct frame *f,
else
gtk_image_set_from_surface (old_widget, surface);
#else /* !HAVE_GTK3 */
GdkPixbuf *icon_buf = xg_get_pixbuf_from_surface (f, surface);
GdkPixbuf *icon_buf = xg_get_pixbuf_from_surface (surface);
if (icon_buf)
{