1 files changed, 55 insertions, 0 deletions
diff --git a/libdimension/internal/rgba.h b/libdimension/internal/rgba.h
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--- /dev/null
+++ b/libdimension/internal/rgba.h
@@ -0,0 +1,55 @@
+/*************************************************************************
+ * Copyright (C) 2010-2014 Tavian Barnes <tavianator@tavianator.com>     *
+ *                                                                       *
+ * This file is part of The Dimension Library.                           *
+ *                                                                       *
+ * The Dimension Library is free software; you can redistribute it and/  *
+ * or modify it under the terms of the GNU Lesser General Public License *
+ * as published by the Free Software Foundation; either version 3 of the *
+ * License, or (at your option) any later version.                       *
+ *                                                                       *
+ * The Dimension Library 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  *
+ * Lesser General Public License for more details.                       *
+ *                                                                       *
+ * You should have received a copy of the GNU Lesser General Public      *
+ * License along with this program.  If not, see                         *
+ * <http://www.gnu.org/licenses/>.                                       *
+ *************************************************************************/
+
+/**
+ * @file
+ * RGBA canvas optimizer interface, used by image optimizers.
+ */
+
+#ifndef DMNSN_INTERNAL_RGBA_H
+#define DMNSN_INTERNAL_RGBA_H
+
+#include "internal.h"
+#include "dimension/canvas.h"
+#include <stdint.h>
+
+/// RGBA8 optimizer type.
+typedef struct dmnsn_rgba8_optimizer {
+  dmnsn_canvas_optimizer optimizer;
+  uint8_t data[];
+} dmnsn_rgba8_optimizer;
+
+/// RGBA16 optimizer type.
+typedef struct dmnsn_rgba16_optimizer {
+  dmnsn_canvas_optimizer optimizer;
+  uint16_t data[];
+} dmnsn_rgba16_optimizer;
+
+/// Apply the RGBA8 optimizer to a canvas.
+DMNSN_INTERNAL void dmnsn_rgba8_optimize_canvas(dmnsn_pool *pool, dmnsn_canvas *canvas);
+/// Apply the RGBA16 optimizer to a canvas.
+DMNSN_INTERNAL void dmnsn_rgba16_optimize_canvas(dmnsn_pool *pool, dmnsn_canvas *canvas);
+
+/// RGBA8 optimizer callback.
+DMNSN_INTERNAL void dmnsn_rgba8_optimizer_fn(dmnsn_canvas_optimizer *optimizer, const dmnsn_canvas *canvas, size_t x, size_t y);
+/// RGBA16 optimizer callback.
+DMNSN_INTERNAL void dmnsn_rgba16_optimizer_fn(dmnsn_canvas_optimizer *optimizer, const dmnsn_canvas *canvas, size_t x, size_t y);
+
+#endif // DMNSN_INTERNAL_RGBA_H