mesa: Also report renderbuffer red/green size for GL_RED and GL_RG.

Noticed by code inspection.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index 5a93b0f03af..f7b77233500 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -1171,8 +1171,17 @@ get_component_bits(GLenum pname, GLenum baseFormat, gl_format format)
    switch (pname) {
    case GL_RENDERBUFFER_RED_SIZE_EXT:
    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
+      if (baseFormat == GL_RGB || baseFormat == GL_RGBA ||
+	  baseFormat == GL_RG || baseFormat == GL_RED)
+         return _mesa_get_format_bits(format, pname);
+      else
+         return 0;
    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
+      if (baseFormat == GL_RGB || baseFormat == GL_RGBA || baseFormat == GL_RG)
+         return _mesa_get_format_bits(format, pname);
+      else
+         return 0;
    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
       if (baseFormat == GL_RGB || baseFormat == GL_RGBA)