gallium: Replace gl_rasterization_rules with lower_left_origin and half_pixel_center.

Squashed commit of the following:

commit 04c5fa2cbb8e89d6f2fa5a75af1cca03b1f6b852
Author: José Fonseca <[email protected]>
Date:   Tue Apr 23 17:37:18 2013 +0100

    gallium: s/lower_left_origin/bottom_edge_rule/

commit 4dff4f64fa83b9737def136fffd161d55e4f1722
Author: José Fonseca <[email protected]>
Date:   Tue Apr 23 17:35:04 2013 +0100

    gallium: Move diagram to docs.

commit 442a63012c8c3c3797f45e03f2ca20ad5f399832
Author: James Benton <[email protected]>
Date:   Fri May 11 17:50:55 2012 +0100

    gallium: Replace gl_rasterization_rules with lower_left_origin and half_pixel_center.

    This change is necessary to achieve correct results when using OpenGL
    FBOs.

Reviewed-by: Marek Olšák <[email protected]>

1 files changed, 5 insertions, 5 deletions

diff --git a/src/gallium/auxiliary/draw/draw_pipe_wide_line.c b/src/gallium/auxiliary/draw/draw_pipe_wide_line.c
index 98da9cfb999..8daefa49ebb 100644
--- a/src/gallium/auxiliary/draw/draw_pipe_wide_line.c
+++ b/src/gallium/auxiliary/draw/draw_pipe_wide_line.c
@@ -77,11 +77,11 @@ static void wideline_line( struct draw_stage *stage,
    const float dx = fabsf(pos0[0] - pos2[0]);
    const float dy = fabsf(pos0[1] - pos2[1]);
 
-   const boolean gl_rasterization_rules =
-      stage->draw->rasterizer->gl_rasterization_rules;
+   const boolean half_pixel_center =
+      stage->draw->rasterizer->half_pixel_center;
 
    /* small tweak to meet GL specification */
-   const float bias = gl_rasterization_rules ? 0.125f : 0.0f;
+   const float bias = half_pixel_center ? 0.125f : 0.0f;
 
    /*
     * Draw wide line as a quad (two tris) by "stretching" the line along
@@ -95,7 +95,7 @@ static void wideline_line( struct draw_stage *stage,
       pos1[1] = pos1[1] + half_width - bias;
       pos2[1] = pos2[1] - half_width - bias;
       pos3[1] = pos3[1] + half_width - bias;
-      if (gl_rasterization_rules) {
+      if (half_pixel_center) {
          if (pos0[0] < pos2[0]) {
             /* left to right line */
             pos0[0] -= 0.5f;
@@ -118,7 +118,7 @@ static void wideline_line( struct draw_stage *stage,
       pos1[0] = pos1[0] + half_width + bias;
       pos2[0] = pos2[0] - half_width + bias;
       pos3[0] = pos3[0] + half_width + bias;
-      if (gl_rasterization_rules) {
+      if (half_pixel_center) {
          if (pos0[1] < pos2[1]) {
             /* top to bottom line */
             pos0[1] -= 0.5f;