From c4182bb9b0897b4a4ac4f06b54fc7f6a2ddeb105 Mon Sep 17 00:00:00 2001
From: Ilia Mirkin <imirkin@alum.mit.edu>
Date: Mon, 9 Nov 2015 12:39:05 -0500
Subject: [PATCH] nv50,nvc0: add ARB_clear_texture support

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
---
 docs/GL3.txt                                     |  2 +-
 docs/relnotes/11.1.0.html                        |  1 +
 src/gallium/drivers/nouveau/nv50/nv50_resource.h |  7 ++
 src/gallium/drivers/nouveau/nv50/nv50_screen.c   |  2 +-
 src/gallium/drivers/nouveau/nv50/nv50_surface.c  | 92 ++++++++++++++++++++++--
 src/gallium/drivers/nouveau/nvc0/nvc0_screen.c   |  2 +-
 src/gallium/drivers/nouveau/nvc0/nvc0_surface.c  |  5 ++
 7 files changed, 103 insertions(+), 8 deletions(-)

diff --git a/docs/GL3.txt b/docs/GL3.txt
index 845672b..b768eea 100644
--- a/docs/GL3.txt
+++ b/docs/GL3.txt
@@ -177,7 +177,7 @@ GL 4.4, GLSL 4.40:
 
   GL_MAX_VERTEX_ATTRIB_STRIDE                          DONE (all drivers)
   GL_ARB_buffer_storage                                DONE (i965, nv50, nvc0, r600, radeonsi)
-  GL_ARB_clear_texture                                 DONE (i965) (gallium - in progress, VMware)
+  GL_ARB_clear_texture                                 DONE (i965, nv50, nvc0)
   GL_ARB_enhanced_layouts                              in progress (Timothy)
   - compile-time constant expressions                  in progress
   - explicit byte offsets for blocks                   in progress
diff --git a/docs/relnotes/11.1.0.html b/docs/relnotes/11.1.0.html
index 14656fd..82ee3c4 100644
--- a/docs/relnotes/11.1.0.html
+++ b/docs/relnotes/11.1.0.html
@@ -46,6 +46,7 @@ Note: some of the new features are only available with certain drivers.
 <ul>
 <li>GL_ARB_arrays_of_arrays on i965</li>
 <li>GL_ARB_blend_func_extended on freedreno (a3xx)</li>
+<li>GL_ARB_clear_texture on nv50, nvc0</li>
 <li>GL_ARB_copy_image on nv50, nvc0, radeonsi</li>
 <li>GL_ARB_gpu_shader_fp64 on r600 for Cypress/Cayman/Aruba chips</li>
 <li>GL_ARB_gpu_shader5 on r600 for Evergreen and later chips</li>
diff --git a/src/gallium/drivers/nouveau/nv50/nv50_resource.h b/src/gallium/drivers/nouveau/nv50/nv50_resource.h
index a46e622..b40370a 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_resource.h
+++ b/src/gallium/drivers/nouveau/nv50/nv50_resource.h
@@ -151,4 +151,11 @@ nv50_surface_from_buffer(struct pipe_context *pipe,
 void
 nv50_surface_destroy(struct pipe_context *, struct pipe_surface *);
 
+void
+nv50_clear_texture(struct pipe_context *pipe,
+                   struct pipe_resource *res,
+                   unsigned level,
+                   const struct pipe_box *box,
+                   const void *data);
+
 #endif /* __NV50_RESOURCE_H__ */
diff --git a/src/gallium/drivers/nouveau/nv50/nv50_screen.c b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
index adf67b7..f47e998 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_screen.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
@@ -182,6 +182,7 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_TGSI_TXQS:
    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
    case PIPE_CAP_SHAREABLE_SHADERS:
+   case PIPE_CAP_CLEAR_TEXTURE:
       return 1;
    case PIPE_CAP_SEAMLESS_CUBE_MAP:
       return 1; /* class_3d >= NVA0_3D_CLASS; */
@@ -218,7 +219,6 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
-   case PIPE_CAP_CLEAR_TEXTURE:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:
diff --git a/src/gallium/drivers/nouveau/nv50/nv50_surface.c b/src/gallium/drivers/nouveau/nv50/nv50_surface.c
index 237d76d..916a7d4 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_surface.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_surface.c
@@ -27,6 +27,7 @@
 #include "util/u_inlines.h"
 #include "util/u_pack_color.h"
 #include "util/u_format.h"
+#include "util/u_math.h"
 #include "util/u_surface.h"
 
 #include "tgsi/tgsi_ureg.h"
@@ -324,6 +325,9 @@ nv50_clear_render_target(struct pipe_context *pipe,
    else
       PUSH_DATA(push, 512);
 
+   BEGIN_NV04(push, NV50_3D(MULTISAMPLE_MODE), 1);
+   PUSH_DATA (push, mt->ms_mode);
+
    if (!nouveau_bo_memtype(bo)) {
       BEGIN_NV04(push, NV50_3D(ZETA_ENABLE), 1);
       PUSH_DATA (push, 0);
@@ -404,6 +408,9 @@ nv50_clear_depth_stencil(struct pipe_context *pipe,
    BEGIN_NV04(push, NV50_3D(RT_ARRAY_MODE), 1);
    PUSH_DATA (push, 512);
 
+   BEGIN_NV04(push, NV50_3D(MULTISAMPLE_MODE), 1);
+   PUSH_DATA (push, mt->ms_mode);
+
    BEGIN_NV04(push, NV50_3D(VIEWPORT_HORIZ(0)), 2);
    PUSH_DATA (push, (width << 16) | dstx);
    PUSH_DATA (push, (height << 16) | dsty);
@@ -418,6 +425,80 @@ nv50_clear_depth_stencil(struct pipe_context *pipe,
 }
 
 void
+nv50_clear_texture(struct pipe_context *pipe,
+                   struct pipe_resource *res,
+                   unsigned level,
+                   const struct pipe_box *box,
+                   const void *data)
+{
+   struct pipe_surface tmpl = {{0}}, *sf;
+
+   tmpl.format = res->format;
+   tmpl.u.tex.first_layer = box->z;
+   tmpl.u.tex.last_layer = box->z + box->depth - 1;
+   tmpl.u.tex.level = level;
+   sf = pipe->create_surface(pipe, res, &tmpl);
+   if (!sf)
+      return;
+
+   if (util_format_is_depth_or_stencil(res->format)) {
+      float depth = 0;
+      uint8_t stencil = 0;
+      unsigned clear = 0;
+      const struct util_format_description *desc =
+         util_format_description(res->format);
+
+      if (util_format_has_depth(desc)) {
+         clear |= PIPE_CLEAR_DEPTH;
+         desc->unpack_z_float(&depth, 0, data, 0, 1, 1);
+      }
+      if (util_format_has_stencil(desc)) {
+         clear |= PIPE_CLEAR_STENCIL;
+         desc->unpack_s_8uint(&stencil, 0, data, 0, 1, 1);
+      }
+      pipe->clear_depth_stencil(pipe, sf, clear, depth, stencil,
+                                box->x, box->y, box->width, box->height);
+   } else {
+      union pipe_color_union color;
+
+      switch (util_format_get_blocksizebits(res->format)) {
+      case 128:
+         sf->format = PIPE_FORMAT_R32G32B32A32_UINT;
+         memcpy(&color.ui, data, 128 / 8);
+         break;
+      case 64:
+         sf->format = PIPE_FORMAT_R32G32_UINT;
+         memcpy(&color.ui, data, 64 / 8);
+         memset(&color.ui[2], 0, 64 / 8);
+         break;
+      case 32:
+         sf->format = PIPE_FORMAT_R32_UINT;
+         memcpy(&color.ui, data, 32 / 8);
+         memset(&color.ui[1], 0, 96 / 8);
+         break;
+      case 16:
+         sf->format = PIPE_FORMAT_R16_UINT;
+         color.ui[0] = util_cpu_to_le32(
+            util_le16_to_cpu(*(unsigned short *)data));
+         memset(&color.ui[1], 0, 96 / 8);
+         break;
+      case 8:
+         sf->format = PIPE_FORMAT_R8_UINT;
+         color.ui[0] = util_cpu_to_le32(*(unsigned char *)data);
+         memset(&color.ui[1], 0, 96 / 8);
+         break;
+      default:
+         assert(!"Unknown texel element size");
+         return;
+      }
+
+      pipe->clear_render_target(pipe, sf, &color,
+                                box->x, box->y, box->width, box->height);
+   }
+   pipe->surface_destroy(pipe, sf);
+}
+
+void
 nv50_clear(struct pipe_context *pipe, unsigned buffers,
            const union pipe_color_union *color,
            double depth, unsigned stencil)
@@ -464,11 +545,9 @@ nv50_clear(struct pipe_context *pipe, unsigned buffers,
    if (mode) {
       int zs_layers = 0, color0_layers = 0;
       if (fb->cbufs[0] && (mode & 0x3c))
-         color0_layers = fb->cbufs[0]->u.tex.last_layer -
-            fb->cbufs[0]->u.tex.first_layer + 1;
+         color0_layers = nv50_surface(fb->cbufs[0])->depth;
       if (fb->zsbuf && (mode & ~0x3c))
-         zs_layers = fb->zsbuf->u.tex.last_layer -
-            fb->zsbuf->u.tex.first_layer + 1;
+         zs_layers = nv50_surface(fb->zsbuf)->depth;
 
       for (j = 0; j < MIN2(zs_layers, color0_layers); j++) {
          BEGIN_NV04(push, NV50_3D(CLEAR_BUFFERS), 1);
@@ -488,7 +567,7 @@ nv50_clear(struct pipe_context *pipe, unsigned buffers,
       struct pipe_surface *sf = fb->cbufs[i];
       if (!sf || !(buffers & (PIPE_CLEAR_COLOR0 << i)))
          continue;
-      for (j = 0; j <= sf->u.tex.last_layer - sf->u.tex.first_layer; j++) {
+      for (j = 0; j < nv50_surface(sf)->depth; j++) {
          BEGIN_NV04(push, NV50_3D(CLEAR_BUFFERS), 1);
          PUSH_DATA (push, (i << 6) | 0x3c |
                     (j << NV50_3D_CLEAR_BUFFERS_LAYER__SHIFT));
@@ -585,6 +664,8 @@ nv50_clear_buffer(struct pipe_context *pipe,
    PUSH_DATA (push, height);
    BEGIN_NV04(push, NV50_3D(ZETA_ENABLE), 1);
    PUSH_DATA (push, 0);
+   BEGIN_NV04(push, NV50_3D(MULTISAMPLE_MODE), 1);
+   PUSH_DATA (push, 0);
 
    /* NOTE: only works with D3D clear flag (5097/0x143c bit 4) */
 
@@ -1593,6 +1674,7 @@ nv50_init_surface_functions(struct nv50_context *nv50)
    pipe->resource_copy_region = nv50_resource_copy_region;
    pipe->blit = nv50_blit;
    pipe->flush_resource = nv50_flush_resource;
+   pipe->clear_texture = nv50_clear_texture;
    pipe->clear_render_target = nv50_clear_render_target;
    pipe->clear_depth_stencil = nv50_clear_depth_stencil;
    pipe->clear_buffer = nv50_clear_buffer;
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
index 4a4d702..461fcaa 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
@@ -182,6 +182,7 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
    case PIPE_CAP_SHAREABLE_SHADERS:
+   case PIPE_CAP_CLEAR_TEXTURE:
       return 1;
    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
       return (class_3d >= NVE4_3D_CLASS) ? 1 : 0;
@@ -204,7 +205,6 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_VERTEXID_NOBASE:
    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
-   case PIPE_CAP_CLEAR_TEXTURE:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_surface.c b/src/gallium/drivers/nouveau/nvc0/nvc0_surface.c
index 5f47bad..cdb1fc1 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_surface.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_surface.c
@@ -319,6 +319,7 @@ nvc0_clear_render_target(struct pipe_context *pipe,
       PUSH_DATA(push, dst->u.tex.first_layer + sf->depth);
       PUSH_DATA(push, mt->layer_stride >> 2);
       PUSH_DATA(push, dst->u.tex.first_layer);
+      IMMED_NVC0(push, NVC0_3D(MULTISAMPLE_MODE), mt->ms_mode);
    } else {
       if (res->base.target == PIPE_BUFFER) {
          PUSH_DATA(push, 262144);
@@ -334,6 +335,7 @@ nvc0_clear_render_target(struct pipe_context *pipe,
       PUSH_DATA(push, 0);
 
       IMMED_NVC0(push, NVC0_3D(ZETA_ENABLE), 0);
+      IMMED_NVC0(push, NVC0_3D(MULTISAMPLE_MODE), 0);
 
       /* tiled textures don't have to be fenced, they're not mapped directly */
       nvc0_resource_fence(res, NOUVEAU_BO_WR);
@@ -466,6 +468,7 @@ nvc0_clear_buffer(struct pipe_context *pipe,
    PUSH_DATA (push, 0);
 
    IMMED_NVC0(push, NVC0_3D(ZETA_ENABLE), 0);
+   IMMED_NVC0(push, NVC0_3D(MULTISAMPLE_MODE), 0);
 
    IMMED_NVC0(push, NVC0_3D(CLEAR_BUFFERS), 0x3c);
 
@@ -540,6 +543,7 @@ nvc0_clear_depth_stencil(struct pipe_context *pipe,
    PUSH_DATA (push, (unk << 16) | (dst->u.tex.first_layer + sf->depth));
    BEGIN_NVC0(push, NVC0_3D(ZETA_BASE_LAYER), 1);
    PUSH_DATA (push, dst->u.tex.first_layer);
+   IMMED_NVC0(push, NVC0_3D(MULTISAMPLE_MODE), mt->ms_mode);
 
    BEGIN_NIC0(push, NVC0_3D(CLEAR_BUFFERS), sf->depth);
    for (z = 0; z < sf->depth; ++z) {
@@ -1541,5 +1545,6 @@ nvc0_init_surface_functions(struct nvc0_context *nvc0)
    pipe->flush_resource = nvc0_flush_resource;
    pipe->clear_render_target = nvc0_clear_render_target;
    pipe->clear_depth_stencil = nvc0_clear_depth_stencil;
+   pipe->clear_texture = nv50_clear_texture;
    pipe->clear_buffer = nvc0_clear_buffer;
 }
-- 
2.7.4