mesa: Add support for GL_NV_fill_rectangle

Since we don't have the bits required to support this in OpenGLES yet,
this only enables support for Desktop OpenGL

Signed-off-by: Lyude <[email protected]>

Changes since v1:
- Simply _mesa_PolygonMode() a little bit
- Fix formatting in OpenGL spec excerpts
- Move polygon mode checking into _mesa_valid_to_render()
Changes since v3:
- Improve error message for invalid drawings with GL_FILL_RECTANGLE_NV

Reviewed-by: Ilia Mirkin <[email protected]>

1 files changed, 11 insertions, 2 deletions

diff --git a/src/mesa/main/polygon.c b/src/mesa/main/polygon.c
index 4caf62adfea..1bb7190bc24 100644
--- a/src/mesa/main/polygon.c
+++ b/src/mesa/main/polygon.c
@@ -131,8 +131,17 @@ _mesa_PolygonMode( GLenum face, GLenum mode )
                   _mesa_enum_to_string(face),
                   _mesa_enum_to_string(mode));
 
-   if (mode!=GL_POINT && mode!=GL_LINE && mode!=GL_FILL) {
-      _mesa_error( ctx, GL_INVALID_ENUM, "glPolygonMode(mode)" );
+   switch (mode) {
+   case GL_POINT:
+   case GL_LINE:
+   case GL_FILL:
+      break;
+   case GL_FILL_RECTANGLE_NV:
+      if (ctx->Extensions.NV_fill_rectangle)
+         break;
+      /* fall-through */
+   default:
+      _mesa_error(ctx, GL_INVALID_ENUM, "glPolygonMode(mode)");
       return;
    }