glstate: More accurately check for READ_BUFFER/ReadBuffer support.

2 files changed, 6 insertions, 0 deletions

diff --git a/helpers/glfeatures.cpp b/helpers/glfeatures.cpp
index 0f4945dd..2a5b1aae 100644
--- a/helpers/glfeatures.cpp
+++ b/helpers/glfeatures.cpp
@@ -353,6 +353,8 @@ Features::load(const Profile & profile, const Extensions & ext)
                               ext.has("GL_ARB_pixel_buffer_object") ||
                               ext.has("GL_EXT_pixel_buffer_object");
 
+        read_buffer = 1;
+
         framebuffer_object = profile.versionGreaterOrEqual(3, 0) ||
                              ext.has("GL_ARB_framebuffer_object") ||
                              ext.has("GL_EXT_framebuffer_object");
@@ -365,6 +367,9 @@ Features::load(const Profile & profile, const Extensions & ext)
         pixel_buffer_object = profile.versionGreaterOrEqual(3, 1) ||
                               ext.has("GL_NV_pixel_buffer_object");
 
+        read_buffer = ext.has("GL_EXT_multiview_draw_buffers") ||
+                      ext.has("GL_NV_read_buffer");
+
         framebuffer_object = profile.versionGreaterOrEqual(2, 0) ||
                              ext.has("GL_OES_framebuffer_object");
 
diff --git a/helpers/glfeatures.hpp b/helpers/glfeatures.hpp
index e8f9b9c9..5c7bb193 100644
--- a/helpers/glfeatures.hpp
+++ b/helpers/glfeatures.hpp
@@ -156,6 +156,7 @@ struct Features
     unsigned ARB_program_interface_query:1;
 
     unsigned pixel_buffer_object:1;
+    unsigned read_buffer:1;
     unsigned framebuffer_object:1;
     unsigned read_framebuffer_object:1;
     unsigned query_buffer_object:1;