1 files changed, 93 insertions, 0 deletions
diff --git a/src/lmcbits.c b/src/lmcbits.c
new file mode 100644
index 00000000..88fa99c3
--- /dev/null
+++ b/src/lmcbits.c
@@ -0,0 +1,93 @@
+#include "lmcbits.h"
+
+LmcBits *
+lmc_bits_new (LmcBitsFormat  format,
+	      int            width,
+	      int            height,
+	      guchar        *data,
+	      int            rowstride,
+	      GDestroyNotify notify,
+	      gpointer       notify_data)
+{
+  LmcBits *bits = g_new0 (LmcBits, 1);
+  
+  bits->ref_count = 1;
+  
+  bits->format = format;
+  bits->width = width;
+  bits->height = height;
+  bits->data_ = data;
+  bits->rowstride = rowstride;
+  bits->notify = notify;
+  bits->notify_data = notify_data;
+
+  return bits;
+}
+
+LmcBits *
+lmc_bits_new_from_pixbuf (GdkPixbuf *pixbuf)
+{
+  return lmc_bits_new (gdk_pixbuf_get_has_alpha (pixbuf) ? LMC_BITS_RGBA_MSB_32 : LMC_BITS_RGB_24,
+		       gdk_pixbuf_get_width (pixbuf),
+		       gdk_pixbuf_get_height (pixbuf),
+		       gdk_pixbuf_get_pixels (pixbuf),
+		       gdk_pixbuf_get_rowstride (pixbuf),
+		       (GDestroyNotify)g_object_unref,
+		       g_object_ref (pixbuf));
+}
+
+LmcBits *
+lmc_bits_ref (LmcBits *bits)
+{
+  g_atomic_int_inc (&bits->ref_count);
+
+  return bits;
+}
+
+void
+lmc_bits_unref (LmcBits *bits)
+{
+  if (g_atomic_int_dec_and_test (&bits->ref_count))
+    {
+      if (bits->notify)
+	bits->notify (bits->notify_data);
+      
+      g_free (bits);
+    }
+}
+
+
+guchar *
+lmc_bits_lock (LmcBits *bits)
+{
+  guchar *result;
+  
+  result = bits->data_;
+
+  return result;
+}
+
+void
+lmc_bits_unlock (LmcBits *bits)
+{
+}
+
+gboolean
+lmc_bits_has_alpha (LmcBits *bits)
+{
+  switch (bits->format)
+    {
+    case LMC_BITS_RGB_16:
+      return FALSE;
+    case LMC_BITS_RGB_24:
+      return FALSE;
+    case LMC_BITS_RGB_32:
+      return FALSE;
+    case LMC_BITS_RGBA_MSB_32:
+      return TRUE;
+    case LMC_BITS_ARGB_32:
+      return TRUE;
+    default:
+      return FALSE;
+    }
+}