mesa: add glformats integer type/format detection routines

_mesa_is_integer_format is moved to formats.c and renamed
as _mesa_is_enum_format_integer.

_mesa_is_format_unsigned, _mesa_is_type_integer,
_mesa_is_type_unsigned, and _mesa_is_enum_format_or_type_integer
are added.

Signed-off-by: Jordan Justen <[email protected]>
Reviewed-by: Brian Paul <[email protected]>

1 files changed, 201 insertions, 0 deletions

diff --git a/src/mesa/main/glformats.c b/src/mesa/main/glformats.c
new file mode 100644
index 00000000000..5b5008ed6cc
--- /dev/null
+++ b/src/mesa/main/glformats.c
@@ -0,0 +1,201 @@
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ * Copyright (c) 2008-2009  VMware, Inc.
+ * Copyright (c) 2012 Intel Corporation
+ *
+ * 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 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 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.
+ */
+
+
+#include "imports.h"
+#include "glformats.h"
+
+
+/**
+ * Test if the given format is an integer (non-normalized) format.
+ */
+GLboolean
+_mesa_is_enum_format_integer(GLenum format)
+{
+   switch (format) {
+   /* generic integer formats */
+   case GL_RED_INTEGER_EXT:
+   case GL_GREEN_INTEGER_EXT:
+   case GL_BLUE_INTEGER_EXT:
+   case GL_ALPHA_INTEGER_EXT:
+   case GL_RGB_INTEGER_EXT:
+   case GL_RGBA_INTEGER_EXT:
+   case GL_BGR_INTEGER_EXT:
+   case GL_BGRA_INTEGER_EXT:
+   case GL_LUMINANCE_INTEGER_EXT:
+   case GL_LUMINANCE_ALPHA_INTEGER_EXT:
+   case GL_RG_INTEGER:
+   /* specific integer formats */
+   case GL_RGBA32UI_EXT:
+   case GL_RGB32UI_EXT:
+   case GL_RG32UI:
+   case GL_R32UI:
+   case GL_ALPHA32UI_EXT:
+   case GL_INTENSITY32UI_EXT:
+   case GL_LUMINANCE32UI_EXT:
+   case GL_LUMINANCE_ALPHA32UI_EXT:
+   case GL_RGBA16UI_EXT:
+   case GL_RGB16UI_EXT:
+   case GL_RG16UI:
+   case GL_R16UI:
+   case GL_ALPHA16UI_EXT:
+   case GL_INTENSITY16UI_EXT:
+   case GL_LUMINANCE16UI_EXT:
+   case GL_LUMINANCE_ALPHA16UI_EXT:
+   case GL_RGBA8UI_EXT:
+   case GL_RGB8UI_EXT:
+   case GL_RG8UI:
+   case GL_R8UI:
+   case GL_ALPHA8UI_EXT:
+   case GL_INTENSITY8UI_EXT:
+   case GL_LUMINANCE8UI_EXT:
+   case GL_LUMINANCE_ALPHA8UI_EXT:
+   case GL_RGBA32I_EXT:
+   case GL_RGB32I_EXT:
+   case GL_RG32I:
+   case GL_R32I:
+   case GL_ALPHA32I_EXT:
+   case GL_INTENSITY32I_EXT:
+   case GL_LUMINANCE32I_EXT:
+   case GL_LUMINANCE_ALPHA32I_EXT:
+   case GL_RGBA16I_EXT:
+   case GL_RGB16I_EXT:
+   case GL_RG16I:
+   case GL_R16I:
+   case GL_ALPHA16I_EXT:
+   case GL_INTENSITY16I_EXT:
+   case GL_LUMINANCE16I_EXT:
+   case GL_LUMINANCE_ALPHA16I_EXT:
+   case GL_RGBA8I_EXT:
+   case GL_RGB8I_EXT:
+   case GL_RG8I:
+   case GL_R8I:
+   case GL_ALPHA8I_EXT:
+   case GL_INTENSITY8I_EXT:
+   case GL_LUMINANCE8I_EXT:
+   case GL_LUMINANCE_ALPHA8I_EXT:
+   case GL_RGB10_A2UI:
+      return GL_TRUE;
+   default:
+      return GL_FALSE;
+   }
+}
+
+
+/**
+ * Test if the given type is an integer (non-normalized) format.
+ */
+GLboolean
+_mesa_is_type_integer(GLenum type)
+{
+   switch (type) {
+   case GL_INT:
+   case GL_UNSIGNED_INT:
+   case GL_SHORT:
+   case GL_UNSIGNED_SHORT:
+   case GL_BYTE:
+   case GL_UNSIGNED_BYTE:
+      return GL_TRUE;
+   default:
+      return GL_FALSE;
+   }
+}
+
+
+/**
+ * Test if the given format or type is an integer (non-normalized) format.
+ */
+extern GLboolean
+_mesa_is_enum_format_or_type_integer(GLenum format, GLenum type)
+{
+   return _mesa_is_enum_format_integer(format) || _mesa_is_type_integer(type);
+}
+
+
+GLboolean
+_mesa_is_type_unsigned(GLenum type)
+{
+   switch (type) {
+   case GL_UNSIGNED_INT:
+   case GL_UNSIGNED_INT_8_8_8_8:
+   case GL_UNSIGNED_INT_8_8_8_8_REV:
+   case GL_UNSIGNED_INT_10_10_10_2:
+   case GL_UNSIGNED_INT_2_10_10_10_REV:
+
+   case GL_UNSIGNED_SHORT:
+   case GL_UNSIGNED_SHORT_4_4_4_4:
+   case GL_UNSIGNED_SHORT_5_5_5_1:
+   case GL_UNSIGNED_SHORT_5_6_5:
+   case GL_UNSIGNED_SHORT_5_6_5_REV:
+   case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+   case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+   case GL_UNSIGNED_SHORT_8_8_MESA:
+   case GL_UNSIGNED_SHORT_8_8_REV_MESA:
+
+   case GL_UNSIGNED_BYTE:
+   case GL_UNSIGNED_BYTE_3_3_2:
+   case GL_UNSIGNED_BYTE_2_3_3_REV:
+      return GL_TRUE;
+
+   default:
+      return GL_FALSE;
+   }
+}
+
+
+/**
+ * Convert various base formats to the cooresponding integer format.
+ */
+GLenum
+_mesa_base_format_to_integer_format(GLenum format)
+{
+   switch(format) {
+   case GL_RED:
+      return GL_RED_INTEGER;
+   case GL_GREEN:
+      return GL_GREEN_INTEGER;
+   case GL_BLUE:
+      return GL_BLUE_INTEGER;
+   case GL_RG:
+      return GL_RG_INTEGER;
+   case GL_RGB:
+      return GL_RGB_INTEGER;
+   case GL_RGBA:
+      return GL_RGBA_INTEGER;
+   case GL_BGR:
+      return GL_BGR_INTEGER;
+   case GL_BGRA:
+      return GL_BGRA_INTEGER;
+   case GL_ALPHA:
+      return GL_ALPHA_INTEGER;
+   case GL_LUMINANCE:
+      return GL_LUMINANCE_INTEGER_EXT;
+   case GL_LUMINANCE_ALPHA:
+      return GL_LUMINANCE_ALPHA_INTEGER_EXT;
+   }
+
+   return format;
+}
+