[Mesa-dev] [v2 7/18] i965/blorp: Load tranformation coordinates as vec4

[Jason Ekstrand]

Thanks for the quick turnaround.  Patches 6, 6.1, and 7 are

Reviewed-by: Jason Ekstrand <jason at jlekstrand.net>

I assume that the "use flat inputs" patch just tweaks the LOAD_INPUT macro
in the obvious way?  If so, then we should be good to go. Thanks for
working on this!  I like blorp not trashing as much state. :-)
On Jul 3, 2016 11:41 PM, "Topi Pohjolainen" <topi.pohjolainen at intel.com>
wrote:

In preparation for loading as flat vertex input.

v2: Use LOAD_INPUT() macro

Signed-off-by: Topi Pohjolainen <topi.pohjolainen at intel.com>
Reviewed-by: Jason Ekstrand <jason at jlekstrand.net> (v1)
---
 src/mesa/drivers/dri/i965/brw_blorp.h        |  3 +--
 src/mesa/drivers/dri/i965/brw_blorp_blit.cpp | 24 ++++++++++--------------
 2 files changed, 11 insertions(+), 16 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_blorp.h
b/src/mesa/drivers/dri/i965/brw_blorp.h
index f5dba58..3f77ca4 100644
--- a/src/mesa/drivers/dri/i965/brw_blorp.h
+++ b/src/mesa/drivers/dri/i965/brw_blorp.h
@@ -212,8 +212,7 @@ struct brw_blorp_wm_inputs
 {
    struct brw_blorp_discard_rect discard_rect;
    struct brw_blorp_rect_grid rect_grid;
-   struct brw_blorp_coord_transform x_transform;
-   struct brw_blorp_coord_transform y_transform;
+   struct brw_blorp_coord_transform coord_transform[2];

    /* Minimum layer setting works for all the textures types but texture_3d
     * for which the setting has no effect. Use the z-coordinate instead.
diff --git a/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp
b/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp
index dbf33e1..0d9fb92 100644
--- a/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp
+++ b/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp
@@ -333,10 +333,7 @@ struct brw_blorp_blit_vars {
    /* Input values from brw_blorp_wm_inputs */
    nir_variable *u_discard_rect;
    nir_variable *u_rect_grid;
-   struct {
-      nir_variable *multiplier;
-      nir_variable *offset;
-   } u_x_transform, u_y_transform;
+   nir_variable *u_coord_transform;
    nir_variable *u_src_z;

    /* gl_FragCoord */
@@ -360,10 +357,7 @@ brw_blorp_blit_vars_init(nir_builder *b, struct
brw_blorp_blit_vars *v,

    LOAD_INPUT(discard_rect, glsl_vec4_type())
    LOAD_INPUT(rect_grid, glsl_vec4_type())
-   LOAD_INPUT(x_transform.multiplier, glsl_float_type())
-   LOAD_INPUT(x_transform.offset, glsl_float_type())
-   LOAD_INPUT(y_transform.multiplier, glsl_float_type())
-   LOAD_INPUT(y_transform.offset, glsl_float_type())
+   LOAD_INPUT(coord_transform, glsl_vec4_type())
    LOAD_INPUT(src_z, glsl_uint_type())

 #undef LOAD_INPUT
@@ -401,10 +395,12 @@ nir_ssa_def *
 blorp_blit_apply_transform(nir_builder *b, nir_ssa_def *src_pos,
                            struct brw_blorp_blit_vars *v)
 {
-   nir_ssa_def *offset = nir_vec2(b, nir_load_var(b,
v->u_x_transform.offset),
-                                     nir_load_var(b,
v->u_y_transform.offset));
-   nir_ssa_def *mul = nir_vec2(b, nir_load_var(b,
v->u_x_transform.multiplier),
-                                  nir_load_var(b,
v->u_y_transform.multiplier));
+   nir_ssa_def *coord_transform = nir_load_var(b, v->u_coord_transform);
+
+   nir_ssa_def *offset = nir_vec2(b, nir_channel(b, coord_transform, 1),
+                                     nir_channel(b, coord_transform, 3));
+   nir_ssa_def *mul = nir_vec2(b, nir_channel(b, coord_transform, 0),
+                                  nir_channel(b, coord_transform, 2));

    return nir_ffma(b, src_pos, mul, offset);
 }
@@ -1847,9 +1843,9 @@ brw_blorp_blit_miptrees(struct brw_context *brw,
    params.wm_inputs.rect_grid.y1 =
       minify(src_mt->logical_height0, src_level) * wm_prog_key.y_scale -
1.0f;

-   brw_blorp_setup_coord_transform(&params.wm_inputs.x_transform,
+   brw_blorp_setup_coord_transform(&params.wm_inputs.coord_transform[0],
                                    src_x0, src_x1, dst_x0, dst_x1,
mirror_x);
-   brw_blorp_setup_coord_transform(&params.wm_inputs.y_transform,
+   brw_blorp_setup_coord_transform(&params.wm_inputs.coord_transform[1],
                                    src_y0, src_y1, dst_y0, dst_y1,
mirror_y);

    if (brw->gen >= 8 && params.src.mt->target == GL_TEXTURE_3D) {
--
2.5.5

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