[client] spice: added initial framework for spice display fallback

client/src/render_queue.h

@@ -0,0 +1,72 @@
+/**
+ * Looking Glass
+ * Copyright © 2017-2022 The Looking Glass Authors
+ * https://looking-glass.io
+ *
+ * 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 "common/ll.h"
+
+typedef struct
+{
+  enum
+  {
+    SPICE_OP_CONFIGURE,
+    SPICE_OP_DRAW_FILL,
+    SPICE_OP_DRAW_BITMAP
+  }
+  op;
+
+  union
+  {
+    struct
+    {
+      int width, height;
+    }
+    configure;
+
+    struct
+    {
+      int      x, y;
+      int      width, height;
+      uint32_t color;
+    }
+    fillRect;
+
+    struct
+    {
+      int       x    , y;
+      int       width, height;
+      int       stride;
+      uint8_t * data;
+    }
+    drawBitmap;
+  };
+}
+RenderCommand;
+
+void renderQueue_init(void);
+void renderQueue_free(void);
+void renderQueue_clear(void);
+void renderQueue_process(void);
+
+void renderQueue_spiceConfigure(int width, int height);
+
+void renderQueue_spiceDrawFill(int x, int y, int width, int height,
+    uint32_t color);
+
+void renderQueue_spiceDrawBitmap(int x, int y, int width, int height, int stride,
+    void * data);