gallium: remove use of origin_lower_left

This was used to indicate OpenGL's lower-left origin for fragment window
coordinates for polygon stipple and gl_FragCoord.

Now:
  - fragment coordinate origin is always upper-left corner
  - GL polygon stipple is inverted and shifted before given to gallium
  - GL fragment programs that use INPUT[WPOS] are modified to use an
    inverted window coord which is placed in a temp register.

Note: the origin_lower_left field still exists in pipe_rasterizer_state.
Remove it when all the drivers, etc. no longer reference it.

2 files changed, 6 insertions, 25 deletions

diff --git a/src/gallium/drivers/softpipe/sp_quad_stipple.c b/src/gallium/drivers/softpipe/sp_quad_stipple.c
index 05e862f0977..07162db7b6e 100644
--- a/src/gallium/drivers/softpipe/sp_quad_stipple.c
+++ b/src/gallium/drivers/softpipe/sp_quad_stipple.c
@@ -22,21 +22,11 @@ stipple_quad(struct quad_stage *qs, struct quad_header *quad)
    if (quad->input.prim == QUAD_PRIM_TRI) {
       struct softpipe_context *softpipe = qs->softpipe;
       /* need to invert Y to index into OpenGL's stipple pattern */
-      int y0, y1;
-      uint stipple0, stipple1;
       const int col0 = quad->input.x0 % 32;
-
-      if (softpipe->rasterizer->origin_lower_left) {
-         y0 = softpipe->framebuffer.height - 1 - quad->input.y0;
-         y1 = y0 - 1;
-      }
-      else {
-         y0 = quad->input.y0;
-         y1 = y0 + 1;
-      }
-
-      stipple0 = softpipe->poly_stipple.stipple[y0 % 32];
-      stipple1 = softpipe->poly_stipple.stipple[y1 % 32];
+      const int y0 = quad->input.y0;
+      const int y1 = y0 + 1;
+      const uint stipple0 = softpipe->poly_stipple.stipple[y0 % 32];
+      const uint stipple1 = softpipe->poly_stipple.stipple[y1 % 32];
 
       /* turn off quad mask bits that fail the stipple test */
       if ((stipple0 & (bit31 >> col0)) == 0)
diff --git a/src/gallium/drivers/softpipe/sp_setup.c b/src/gallium/drivers/softpipe/sp_setup.c
index 0925653b5d5..96cb09b9051 100644
--- a/src/gallium/drivers/softpipe/sp_setup.c
+++ b/src/gallium/drivers/softpipe/sp_setup.c
@@ -732,18 +732,9 @@ setup_fragcoord_coeff(struct setup_context *setup, uint slot)
    setup->coef[slot].dadx[0] = 1.0;
    setup->coef[slot].dady[0] = 0.0;
    /*Y*/
-   if (setup->softpipe->rasterizer->origin_lower_left) {
-      /* y=0=bottom */
-      const int winHeight = setup->softpipe->framebuffer.height;
-      setup->coef[slot].a0[1] = (float) (winHeight - 1);
-      setup->coef[slot].dady[1] = -1.0;
-   }
-   else {
-      /* y=0=top */
-      setup->coef[slot].a0[1] = 0.0;
-      setup->coef[slot].dady[1] = 1.0;
-   }
+   setup->coef[slot].a0[1] = 0.0;
    setup->coef[slot].dadx[1] = 0.0;
+   setup->coef[slot].dady[1] = 1.0;
    /*Z*/
    setup->coef[slot].a0[2] = setup->posCoef.a0[2];
    setup->coef[slot].dadx[2] = setup->posCoef.dadx[2];