diff options
| -rw-r--r-- | src/mesa/main/fbobject.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c index 2c01526d167..09da6b70d87 100644 --- a/src/mesa/main/fbobject.c +++ b/src/mesa/main/fbobject.c @@ -303,9 +303,21 @@ _mesa_get_fb0_attachment(struct gl_context *ctx, struct gl_framebuffer *fb, switch (attachment) { case GL_FRONT_LEFT: - return &fb->Attachment[BUFFER_FRONT_LEFT]; + /* Front buffers can be allocated on the first use, but + * glGetFramebufferAttachmentParameteriv must work even if that + * allocation hasn't happened yet. In such case, use the back buffer, + * which should be the same. + */ + if (fb->Attachment[BUFFER_FRONT_LEFT].Type == GL_NONE) + return &fb->Attachment[BUFFER_BACK_LEFT]; + else + return &fb->Attachment[BUFFER_FRONT_LEFT]; case GL_FRONT_RIGHT: - return &fb->Attachment[BUFFER_FRONT_RIGHT]; + /* Same as above. */ + if (fb->Attachment[BUFFER_FRONT_RIGHT].Type == GL_NONE) + return &fb->Attachment[BUFFER_BACK_RIGHT]; + else + return &fb->Attachment[BUFFER_FRONT_RIGHT]; case GL_BACK_LEFT: return &fb->Attachment[BUFFER_BACK_LEFT]; case GL_BACK_RIGHT: |