mesa: add ETC1 decoding routines

The format is defined by GL_OES_compressed_ETC1_RGB8_texture.  These routines
will be used in the following commit.

Reviewed-by: Brian Paul <[email protected]>

1 files changed, 40 insertions, 0 deletions

diff --git a/src/mesa/main/texcompress_etc.h b/src/mesa/main/texcompress_etc.h
new file mode 100644
index 00000000000..4e166b2b1fc
--- /dev/null
+++ b/src/mesa/main/texcompress_etc.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2011 LunarG, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef TEXCOMPRESS_ETC1_H
+#define TEXCOMPRESS_ETC1_H
+
+#include "glheader.h"
+#include "mfeatures.h"
+#include "texstore.h"
+
+struct swrast_texture_image;
+
+extern GLboolean
+_mesa_texstore_etc1_rgb8(TEXSTORE_PARAMS);
+
+extern void
+_mesa_fetch_texel_2d_f_etc1_rgb8(const struct swrast_texture_image *texImage,
+                                 GLint i, GLint j, GLint k, GLfloat *texel);
+
+#endif