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]>

4 files changed, 10 insertions, 4 deletions

diff --git a/src/mesa/state_tracker/st_atom_rasterizer.c b/src/mesa/state_tracker/st_atom_rasterizer.c
index 62464b4750b..561dc9accb8 100644
--- a/src/mesa/state_tracker/st_atom_rasterizer.c
+++ b/src/mesa/state_tracker/st_atom_rasterizer.c
@@ -228,7 +228,10 @@ static void update_raster_state( struct st_context *st )
    /* _NEW_FRAG_CLAMP */
    raster->clamp_fragment_color = !st->clamp_frag_color_in_shader &&
                                   ctx->Color._ClampFragmentColor;
-   raster->gl_rasterization_rules = 1;
+
+   raster->half_pixel_center = 1;
+   if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP)
+      raster->bottom_edge_rule = 1;
 
    /* _NEW_RASTERIZER_DISCARD */
    raster->rasterizer_discard = ctx->RasterDiscard;
diff --git a/src/mesa/state_tracker/st_cb_bitmap.c b/src/mesa/state_tracker/st_cb_bitmap.c
index 456933621e2..e96f4b36ec4 100644
--- a/src/mesa/state_tracker/st_cb_bitmap.c
+++ b/src/mesa/state_tracker/st_cb_bitmap.c
@@ -825,7 +825,8 @@ st_init_bitmap(struct st_context *st)
 
    /* init baseline rasterizer state once */
    memset(&st->bitmap.rasterizer, 0, sizeof(st->bitmap.rasterizer));
-   st->bitmap.rasterizer.gl_rasterization_rules = 1;
+   st->bitmap.rasterizer.half_pixel_center = 1;
+   st->bitmap.rasterizer.bottom_edge_rule = 1;
    st->bitmap.rasterizer.depth_clip = 1;
 
    /* find a usable texture format */
diff --git a/src/mesa/state_tracker/st_cb_clear.c b/src/mesa/state_tracker/st_cb_clear.c
index a5aa8f49602..566f4a76e14 100644
--- a/src/mesa/state_tracker/st_cb_clear.c
+++ b/src/mesa/state_tracker/st_cb_clear.c
@@ -67,7 +67,8 @@ st_init_clear(struct st_context *st)
 {
    memset(&st->clear, 0, sizeof(st->clear));
 
-   st->clear.raster.gl_rasterization_rules = 1;
+   st->clear.raster.half_pixel_center = 1;
+   st->clear.raster.bottom_edge_rule = 1;
    st->clear.raster.depth_clip = 1;
 }
 
diff --git a/src/mesa/state_tracker/st_cb_drawpixels.c b/src/mesa/state_tracker/st_cb_drawpixels.c
index de7b91f281b..68359e8037b 100644
--- a/src/mesa/state_tracker/st_cb_drawpixels.c
+++ b/src/mesa/state_tracker/st_cb_drawpixels.c
@@ -710,7 +710,8 @@ draw_textured_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z,
       memset(&rasterizer, 0, sizeof(rasterizer));
       rasterizer.clamp_fragment_color = !st->clamp_frag_color_in_shader &&
                                         ctx->Color._ClampFragmentColor;
-      rasterizer.gl_rasterization_rules = 1;
+      rasterizer.half_pixel_center = 1;
+      rasterizer.bottom_edge_rule = 1;
       rasterizer.depth_clip = !ctx->Transform.DepthClamp;
       rasterizer.scissor = ctx->Scissor.Enabled;
       cso_set_rasterizer(cso, &rasterizer);