gallium: implement a heads-up display module

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

v2: lots of cosmetic changes

1 files changed, 59 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/hud/font.h b/src/gallium/auxiliary/hud/font.h
new file mode 100644
index 00000000000..cf1c8798403
--- /dev/null
+++ b/src/gallium/auxiliary/hud/font.h
@@ -0,0 +1,59 @@
+/**************************************************************************
+ *
+ * Copyright 2013 Marek Olšák <[email protected]>
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS 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 FONT_H
+#define FONT_H
+
+#include "pipe/p_compiler.h"
+
+struct pipe_resource;
+struct pipe_context;
+
+enum util_font_name {
+   UTIL_FONT_FIXED_8X13
+};
+
+/* The font is stored in a RECT texture. There are 256 glyphs
+ * drawn in a 16x16 matrix. The texture coordinates of a glyph
+ * within the matrix should be calculated as follows:
+ *
+ *    x1 = (glyph % 16) * glyph_width;
+ *    y1 = (glyph / 16) * glyph_height;
+ *    x2 = x1 + glyph_width;
+ *    y2 = y1 + glyph_height;
+ */
+struct util_font {
+   struct pipe_resource *texture;
+   unsigned glyph_width;
+   unsigned glyph_height;
+};
+
+boolean
+util_font_create(struct pipe_context *pipe, enum util_font_name name,
+                         struct util_font *out_font);
+
+#endif