----- Original Message -----
> Some suggestions for the name:
>
> lower_left_edge_rule
> lower_left_rasterization_edge_rule
> gl_edge_rule
> gl_rasterization_edge_rule
>
> In this case, the name is not as important as the documentation which
> defines the behavior of the state.
On that note, I thought that James' diagrams were pretty good. Maybe the axis
is misleading.
+ /**
+ * Triangle rasterization always uses a 'top,left' rule for pixel ownership,
+ * this just alters what we consider to be the top edge for that test.
+ *
+ * When true, screen coordinates origin is considered to be at bottom-left
+ * (e.g., OpenGL drawables):
+ *
+ * y ^
+ * |
+ * | +=============+ <- top edge
+ * | | |
+ * | | |
+ * | | |
+ * | +-------------+
+ * |
+ * 0 +--------------------->
+ * 0 x
+ *
+ * When false, screen coordinates origin is considered to be at top-left
+ * (e.g., OpenGL FBOs, D3D):
+ *
+ * 0 x
+ * 0 +--------------------->
+ * |
+ * | +=============+ <- top edge
+ * | | |
+ * | | |
+ * | | |
+ * | +-------------+
+ * |
+ * y V
*
- * Triangle rasterization always uses a 'top,left' rule for pixel
- * ownership, this just alters which point we consider the pixel
- * center for that test.
+ * See also:
+ * - http://www.opengl.org/registry/specs/ARB/fragment_coord_conventions.txt
+ * - http://msdn.microsoft.com/en-us/library/windows/desktop/cc627092.aspx
+ * - http://msdn.microsoft.com/en-us/library/windows/desktop/bb147314.aspx
*/
- unsigned gl_rasterization_rules:1;
+ unsigned lower_left_origin:1;
/**
* When true, rasterization is disabled and no pixels are written.
Jose
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