mesa: Allow MESA_framebuffer_flip_y for GLES 3

Implement glFramebufferParameteriMESA on GLES 3 so
that the extension is not dependant on GLES 3.1

Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>

src/mapi/glapi/gen/apiexec.py

@@ -150,6 +150,10 @@ functions = {
     "FramebufferParameteri": exec_info(compatibility=30, core=31, es2=31),
     "GetFramebufferParameteriv": exec_info(compatibility=30, core=31, es2=31),
 
+    # OpenGL 4.3 / GL_MESA_framebuffer_flip_y.
+    "FramebufferParameteriMESA": exec_info(core=31, es2=30),
+    "GetFramebufferParameterivMESA": exec_info(core=31, es2=30),
+
     # OpenGL 4.5 / GL_ARB_direct_state_access.   Mesa can expose the extension
     # with core profile.
     "CreateTransformFeedbacks": exec_info(compatibility=31, core=31),

src/mapi/glapi/gen/es_EXT.xml

@@ -1499,4 +1499,19 @@
    </function>
 </category>
 
+<!-- 302. GL_MESA_framebuffer_flip_y -->
+<category name="GL_MESA_framebuffer_flip_y" number="302">
+   <enum name="GL_FRAMEBUFFER_FLIP_Y_MESA" value="0x8BBB"/>
+   <function name="FramebufferParameteriMESA" es2="3.0">
+       <param name="target" type="GLenum"/>
+       <param name="pname"  type="GLenum"/>
+       <param name="param"  type="GLint" />
+   </function>
+   <function name="GetFramebufferParameterivMESA" es2="3.0">
+       <param name="target" type="GLenum" />
+       <param name="pname"  type="GLenum" />
+       <param name="params" type="GLint *" output="true" />
+   </function>
+</category>
+
 </OpenGLAPI>

src/mapi/glapi/gen/static_data.py

@@ -1567,6 +1567,8 @@ offsets = {
     "GetCompressedMultiTexImageEXT": 1531,
     "GetMultiTexLevelParameterivEXT": 1532,
     "GetMultiTexLevelParameterfvEXT": 1533,
+    "FramebufferParameteriMESA": 1534,
+    "GetFramebufferParameterivMESA": 1535,
 }
 
 functions = [