Mesa (master): nv30: fix viewport clipping settings to be based on viewport, not rt

[Ilia Mirkin]

Module: Mesa
Branch: master
Commit: 71609c99548ab3724e604d59b771ef1c83eac4fe
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=71609c99548ab3724e604d59b771ef1c83eac4fe

Author: Ilia Mirkin <imirkin at alum.mit.edu>
Date:   Tue Jun 21 22:51:36 2016 -0400

nv30: fix viewport clipping settings to be based on viewport, not rt

This fixes a ton of "*clip*" dEQP GLES2 tests, as well as
triangle-guardband-viewport in piglit.

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>

---

 src/gallium/drivers/nouveau/nv30/nv30_draw.c           | 13 -------------
 src/gallium/drivers/nouveau/nv30/nv30_state_validate.c | 15 +++++++++++----
 2 files changed, 11 insertions(+), 17 deletions(-)

diff --git a/src/gallium/drivers/nouveau/nv30/nv30_draw.c b/src/gallium/drivers/nouveau/nv30/nv30_draw.c
index 7b0d074..041c73c 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_draw.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_draw.c
@@ -342,19 +342,6 @@ nv30_render_validate(struct nv30_context *nv30)
    for (; i < 16; i++)
       r->vtxfmt[i]  = NV30_3D_VTXFMT_TYPE_V32_FLOAT;
 
-   BEGIN_NV04(push, NV30_3D(VIEWPORT_TRANSLATE_X), 8);
-   PUSH_DATAf(push, 0.0);
-   PUSH_DATAf(push, 0.0);
-   PUSH_DATAf(push, 0.0);
-   PUSH_DATAf(push, 0.0);
-   PUSH_DATAf(push, 1.0);
-   PUSH_DATAf(push, 1.0);
-   PUSH_DATAf(push, 1.0);
-   PUSH_DATAf(push, 1.0);
-   BEGIN_NV04(push, NV30_3D(DEPTH_RANGE_NEAR), 2);
-   PUSH_DATAf(push, 0.0);
-   PUSH_DATAf(push, 1.0);
-
    BEGIN_NV04(push, NV30_3D(VTXFMT(0)), 16);
    PUSH_DATAp(push, r->vtxfmt, 16);
 
diff --git a/src/gallium/drivers/nouveau/nv30/nv30_state_validate.c b/src/gallium/drivers/nouveau/nv30/nv30_state_validate.c
index 8957634..6f54ca0 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_state_validate.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_state_validate.c
@@ -107,9 +107,6 @@ nv30_validate_fb(struct nv30_context *nv30)
    PUSH_DATA (push, w << 16);
    PUSH_DATA (push, h << 16);
    PUSH_DATA (push, rt_format);
-   BEGIN_NV04(push, NV30_3D(VIEWPORT_HORIZ), 2);
-   PUSH_DATA (push, w << 16);
-   PUSH_DATA (push, h << 16);
    BEGIN_NV04(push, NV30_3D(VIEWPORT_TX_ORIGIN), 4);
    PUSH_DATA (push, (y << 16) | x);
    PUSH_DATA (push, 0);
@@ -250,6 +247,11 @@ nv30_validate_viewport(struct nv30_context *nv30)
    struct nouveau_pushbuf *push = nv30->base.pushbuf;
    struct pipe_viewport_state *vp = &nv30->viewport;
 
+   unsigned x = CLAMP(vp->translate[0] - fabsf(vp->scale[0]), 0, 4095);
+   unsigned y = CLAMP(vp->translate[1] - fabsf(vp->scale[1]), 0, 4095);
+   unsigned w = CLAMP(2.0f * fabsf(vp->scale[0]), 0, 4096);
+   unsigned h = CLAMP(2.0f * fabsf(vp->scale[1]), 0, 4096);
+
    BEGIN_NV04(push, NV30_3D(VIEWPORT_TRANSLATE_X), 8);
    PUSH_DATAf(push, vp->translate[0]);
    PUSH_DATAf(push, vp->translate[1]);
@@ -258,10 +260,14 @@ nv30_validate_viewport(struct nv30_context *nv30)
    PUSH_DATAf(push, vp->scale[0]);
    PUSH_DATAf(push, vp->scale[1]);
    PUSH_DATAf(push, vp->scale[2]);
-   PUSH_DATAf(push, 1.0f);
+   PUSH_DATAf(push, 0.0f);
    BEGIN_NV04(push, NV30_3D(DEPTH_RANGE_NEAR), 2);
    PUSH_DATAf(push, vp->translate[2] - fabsf(vp->scale[2]));
    PUSH_DATAf(push, vp->translate[2] + fabsf(vp->scale[2]));
+
+   BEGIN_NV04(push, NV30_3D(VIEWPORT_HORIZ), 2);
+   PUSH_DATA (push, (w << 16) | x);
+   PUSH_DATA (push, (h << 16) | y);
 }
 
 static void
@@ -419,6 +425,7 @@ static struct state_validate swtnl_validate_list[] = {
     { nv30_validate_stencil_ref,   NV30_NEW_STENCIL_REF },
     { nv30_validate_stipple,       NV30_NEW_STIPPLE },
     { nv30_validate_scissor,       NV30_NEW_SCISSOR | NV30_NEW_RASTERIZER },
+    { nv30_validate_viewport,      NV30_NEW_VIEWPORT },
     { nv30_fragprog_validate,      NV30_NEW_FRAGPROG | NV30_NEW_FRAGCONST },
     { nv30_validate_fragment,      NV30_NEW_FRAMEBUFFER | NV30_NEW_FRAGPROG },
     { nv30_fragtex_validate,       NV30_NEW_FRAGTEX },