From: Nanley Chery <nanley.g.ch...@intel.com>
Create a function which determines if an extension is supported in the
current context.
v2. Use common variable names (Emil)
Insert new line between variables and return statement (Chad)
Rename api_set variable to api_bit (Chad)
Signed-off-by: Nanley Chery <nanley.g.ch...@intel.com>
---
src/mesa/main/extensions.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c
index 4fd7487..83c4921 100644
--- a/src/mesa/main/extensions.c
+++ b/src/mesa/main/extensions.c
@@ -426,6 +426,24 @@ typedef unsigned short extension_index;
/**
+ * Given an extension enum, return whether or not the extension is supported
+ * dependent on the following factors:
+ * There's driver support and the OpenGL/ES version is at least that
+ * specified in the extension_table.
+ */
+static inline bool
+_mesa_extension_supported(const struct gl_context *ctx, extension_index i)
+{
+ const bool *base = (bool *) &ctx->Extensions;
+ const struct extension *ext = extension_table + i;
+ const uint8_t api_bit = 1 << ctx->API;
+
+ return (ext->api_set & api_bit) &&
+ (ctx->Version >= ext->version[ctx->API]) &&
+ base[ext->offset];
+}
+
+/**
* Compare two entries of the extensions table. Sorts first by year,
* then by name.
*
--
2.6.2
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