[Bf-blender-cvs] [1aff22b] master: OpenGL: use best available mipmap gen function

[Mike Erwin]

Commit: 1aff22b81d7c2264dcd88b20730851658fda9dff
Author: Mike Erwin
Date:   Thu Jan 7 10:57:03 2016 -0500
Branches: master
https://developer.blender.org/rB1aff22b81d7c2264dcd88b20730851658fda9dff

OpenGL: use best available mipmap gen function

ARB_framebuffer_object works just like GL 3+ and is the preferred
method.

Fall back to older EXT_framebuffer_object if necessary.

===================================================================

M	source/blender/gpu/intern/gpu_draw.c

===================================================================

diff --git a/source/blender/gpu/intern/gpu_draw.c b/source/blender/gpu/intern/gpu_draw.c
index 2550a76..54389cc 100644
--- a/source/blender/gpu/intern/gpu_draw.c
+++ b/source/blender/gpu/intern/gpu_draw.c
@@ -298,7 +298,11 @@ static void gpu_generate_mipmap(GLenum target)
 			glEnable(target);
 	}
 
-	glGenerateMipmapEXT(target);
+	/* TODO: simplify when we transition to GL >= 3 */
+	if (GLEW_VERSION_3_0 || GLEW_ARB_framebuffer_object)
+		glGenerateMipmap(target);
+	else if (GLEW_EXT_framebuffer_object)
+		glGenerateMipmapEXT(target);
 
 	if (is_ati && !target_enabled)
 		glDisable(target);