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grd-local-buffer-copy.c

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+/*
+ * Copyright (C) 2025 Pascal Nowack
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include "grd-local-buffer-copy.h"
+
+struct _GrdLocalBufferCopy
+{
+  GrdLocalBuffer parent;
+
+  uint8_t *buffer;
+  uint32_t buffer_stride;
+};
+
+G_DEFINE_TYPE (GrdLocalBufferCopy, grd_local_buffer_copy,
+               GRD_TYPE_LOCAL_BUFFER)
+
+static uint8_t *
+grd_local_buffer_copy_get_buffer (GrdLocalBuffer *local_buffer)
+{
+  GrdLocalBufferCopy *local_buffer_copy = GRD_LOCAL_BUFFER_COPY (local_buffer);
+
+  return local_buffer_copy->buffer;
+}
+
+static uint32_t
+grd_local_buffer_copy_get_buffer_stride (GrdLocalBuffer *local_buffer)
+{
+  GrdLocalBufferCopy *local_buffer_copy = GRD_LOCAL_BUFFER_COPY (local_buffer);
+
+  return local_buffer_copy->buffer_stride;
+}
+
+GrdLocalBufferCopy *
+grd_local_buffer_copy_new (uint32_t buffer_width,
+                           uint32_t buffer_height)
+{
+  GrdLocalBufferCopy *local_buffer_copy;
+  uint32_t buffer_stride;
+
+  g_assert (buffer_width > 0);
+  g_assert (buffer_height > 0);
+
+  local_buffer_copy = g_object_new (GRD_TYPE_LOCAL_BUFFER_COPY, NULL);
+
+  buffer_stride = buffer_width * 4;
+
+  local_buffer_copy->buffer = g_new0 (uint8_t, buffer_stride * buffer_height);
+  local_buffer_copy->buffer_stride = buffer_stride;
+
+  return local_buffer_copy;
+}
+
+static void
+grd_local_buffer_copy_dispose (GObject *object)
+{
+  GrdLocalBufferCopy *local_buffer_copy = GRD_LOCAL_BUFFER_COPY (object);
+
+  g_clear_pointer (&local_buffer_copy->buffer, g_free);
+
+  G_OBJECT_CLASS (grd_local_buffer_copy_parent_class)->dispose (object);
+}
+
+static void
+grd_local_buffer_copy_init (GrdLocalBufferCopy *local_buffer)
+{
+}
+
+static void
+grd_local_buffer_copy_class_init (GrdLocalBufferCopyClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GrdLocalBufferClass *local_buffer_class = GRD_LOCAL_BUFFER_CLASS (klass);
+
+  object_class->dispose = grd_local_buffer_copy_dispose;
+
+  local_buffer_class->get_buffer = grd_local_buffer_copy_get_buffer;
+  local_buffer_class->get_buffer_stride =
+    grd_local_buffer_copy_get_buffer_stride;
+}