mesa: add helper functions for geometry of gl_framebuffer

Add convenience helper functions for fetching geometry of gl_framebuffer
that return the geometry of the gl_framebuffer instead of the geometry of
the buffers of the gl_framebuffer when then the gl_framebuffer has no
attachments.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Kevin Rogovin <kevin.rogovin@intel.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/src/mesa/main/framebuffer.h b/src/mesa/main/framebuffer.h
index d02b86f..ca286e9 100644
--- a/src/mesa/main/framebuffer.h
+++ b/src/mesa/main/framebuffer.h
@@ -76,6 +76,34 @@ _mesa_scissor_bounding_box(const struct gl_context *ctx,
                            const struct gl_framebuffer *buffer,
                            unsigned idx, int *bbox);
 
+static inline GLuint
+_mesa_geometric_width(const struct gl_framebuffer *buffer)
+{
+   return buffer->_HasAttachments ?
+      buffer->Width : buffer->DefaultGeometry.Width;
+}
+
+static inline GLuint
+_mesa_geometric_height(const struct gl_framebuffer *buffer)
+{
+   return buffer->_HasAttachments ?
+      buffer->Height : buffer->DefaultGeometry.Height;
+}
+
+static inline GLuint
+_mesa_geometric_samples(const struct gl_framebuffer *buffer)
+{
+   return buffer->_HasAttachments ?
+      buffer->Visual.samples : buffer->DefaultGeometry.NumSamples;
+}
+
+static inline GLuint
+_mesa_geometric_layers(const struct gl_framebuffer *buffer)
+{
+   return buffer->_HasAttachments ?
+      buffer->MaxNumLayers : buffer->DefaultGeometry.Layers;
+}
+
 extern void 
 _mesa_update_draw_buffer_bounds(struct gl_context *ctx,
                                 struct gl_framebuffer *drawFb);