gallium: add a cap to determine whether the driver supports offset_clamp

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Glenn Kennard <glenn.kennard@gmail.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>

15 files changed, 20 insertions, 1 deletions

diff --git a/src/gallium/docs/source/screen.rst b/src/gallium/docs/source/screen.rst
index 55d114c829..b72a372a6c 100644
--- a/src/gallium/docs/source/screen.rst
+++ b/src/gallium/docs/source/screen.rst
@@ -241,6 +241,8 @@ The integer capabilities:
   semantics. Only relevant if geometry shaders are supported.
   (Currently not possible to query availability of these two semantics outside
   this, at least BASEVERTEX should be exposed separately too).
+* ``PIPE_CAP_POLYGON_OFFSET_CLAMP``: If true, the driver implements support
+  for ``pipe_rasterizer_state::offset_clamp``.
 
 
 .. _pipe_capf:
diff --git a/src/gallium/drivers/freedreno/freedreno_screen.c b/src/gallium/drivers/freedreno/freedreno_screen.c
index 084a0ec4e2..b7bb859327 100644
--- a/src/gallium/drivers/freedreno/freedreno_screen.c
+++ b/src/gallium/drivers/freedreno/freedreno_screen.c
@@ -229,6 +229,7 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_SAMPLER_VIEW_TARGET:
 	case PIPE_CAP_CLIP_HALFZ:
 	case PIPE_CAP_VERTEXID_NOBASE:
+	case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 		return 0;
 
 	case PIPE_CAP_MAX_VIEWPORTS:
diff --git a/src/gallium/drivers/i915/i915_screen.c b/src/gallium/drivers/i915/i915_screen.c
index 1277de313b..bbc901eed8 100644
--- a/src/gallium/drivers/i915/i915_screen.c
+++ b/src/gallium/drivers/i915/i915_screen.c
@@ -227,6 +227,7 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
    case PIPE_CAP_CLIP_HALFZ:
    case PIPE_CAP_VERTEXID_NOBASE:
+   case PIPE_CAP_POLYGON_OFFSET_CLAMP:
       return 0;
 
    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
diff --git a/src/gallium/drivers/ilo/ilo_screen.c b/src/gallium/drivers/ilo/ilo_screen.c
index 0c948f4dcd..5048ba1ac2 100644
--- a/src/gallium/drivers/ilo/ilo_screen.c
+++ b/src/gallium/drivers/ilo/ilo_screen.c
@@ -497,6 +497,8 @@ ilo_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return true;
    case PIPE_CAP_VERTEXID_NOBASE:
       return false;
+   case PIPE_CAP_POLYGON_OFFSET_CLAMP:
+      return true;
 
    default:
       return 0;
diff --git a/src/gallium/drivers/llvmpipe/lp_screen.c b/src/gallium/drivers/llvmpipe/lp_screen.c
index 0e4456adc7..3b316563ef 100644
--- a/src/gallium/drivers/llvmpipe/lp_screen.c
+++ b/src/gallium/drivers/llvmpipe/lp_screen.c
@@ -284,6 +284,8 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 1;
    case PIPE_CAP_VERTEXID_NOBASE:
       return 0;
+   case PIPE_CAP_POLYGON_OFFSET_CLAMP:
+      return 1;
    }
    /* should only get here on unhandled cases */
    debug_printf("Unexpected PIPE_CAP %d query\n", param);
diff --git a/src/gallium/drivers/nouveau/nv30/nv30_screen.c b/src/gallium/drivers/nouveau/nv30/nv30_screen.c
index 46c21a1cfe..0a403ba15f 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_screen.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_screen.c
@@ -158,6 +158,7 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_SAMPLER_VIEW_TARGET:
    case PIPE_CAP_CLIP_HALFZ:
    case PIPE_CAP_VERTEXID_NOBASE:
+   case PIPE_CAP_POLYGON_OFFSET_CLAMP:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:
diff --git a/src/gallium/drivers/nouveau/nv50/nv50_screen.c b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
index da237f92d1..072a7a240e 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_screen.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
@@ -174,6 +174,7 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_SAMPLER_VIEW_TARGET:
    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
    case PIPE_CAP_CLIP_HALFZ:
+   case PIPE_CAP_POLYGON_OFFSET_CLAMP:
       return 1;
    case PIPE_CAP_SEAMLESS_CUBE_MAP:
       return 1; /* class_3d >= NVA0_3D_CLASS; */
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
index 1d7caf8c8c..cba19db711 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
@@ -172,6 +172,7 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
    case PIPE_CAP_SAMPLER_VIEW_TARGET:
    case PIPE_CAP_CLIP_HALFZ:
+   case PIPE_CAP_POLYGON_OFFSET_CLAMP:
       return 1;
    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
       return (class_3d >= NVE4_3D_CLASS) ? 1 : 0;
diff --git a/src/gallium/drivers/r300/r300_screen.c b/src/gallium/drivers/r300/r300_screen.c
index f82010d766..434f4c4394 100644
--- a/src/gallium/drivers/r300/r300_screen.c
+++ b/src/gallium/drivers/r300/r300_screen.c
@@ -182,6 +182,7 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
         case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
         case PIPE_CAP_SAMPLER_VIEW_TARGET:
         case PIPE_CAP_VERTEXID_NOBASE:
+        case PIPE_CAP_POLYGON_OFFSET_CLAMP:
             return 0;
 
         /* SWTCL-only features. */
diff --git a/src/gallium/drivers/r600/r600_pipe.c b/src/gallium/drivers/r600/r600_pipe.c
index b6f785976c..e3df024b0e 100644
--- a/src/gallium/drivers/r600/r600_pipe.c
+++ b/src/gallium/drivers/r600/r600_pipe.c
@@ -267,6 +267,7 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 	case PIPE_CAP_SAMPLE_SHADING:
 	case PIPE_CAP_CLIP_HALFZ:
+	case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 		return 1;
 
 	case PIPE_CAP_COMPUTE:
diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
index eb2b785de5..eff8d69095 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -226,6 +226,7 @@ static int si_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_DRAW_INDIRECT:
 	case PIPE_CAP_CLIP_HALFZ:
 	case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
+	case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 		return 1;
 
 	case PIPE_CAP_TEXTURE_MULTISAMPLE:
diff --git a/src/gallium/drivers/softpipe/sp_screen.c b/src/gallium/drivers/softpipe/sp_screen.c
index 8efc88fc2b..9aefb882b1 100644
--- a/src/gallium/drivers/softpipe/sp_screen.c
+++ b/src/gallium/drivers/softpipe/sp_screen.c
@@ -233,6 +233,8 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 1;
    case PIPE_CAP_VERTEXID_NOBASE:
       return 0;
+   case PIPE_CAP_POLYGON_OFFSET_CLAMP:
+      return 0;
    }
    /* should only get here on unhandled cases */
    debug_printf("Unexpected PIPE_CAP %d query\n", param);
diff --git a/src/gallium/drivers/svga/svga_screen.c b/src/gallium/drivers/svga/svga_screen.c
index 32578c849e..9e190e2b01 100644
--- a/src/gallium/drivers/svga/svga_screen.c
+++ b/src/gallium/drivers/svga/svga_screen.c
@@ -283,6 +283,7 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_SAMPLER_VIEW_TARGET:
    case PIPE_CAP_CLIP_HALFZ:
    case PIPE_CAP_VERTEXID_NOBASE:
+   case PIPE_CAP_POLYGON_OFFSET_CLAMP:
       return 0;
    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
       return 64;
diff --git a/src/gallium/drivers/vc4/vc4_screen.c b/src/gallium/drivers/vc4/vc4_screen.c
index 8d216338bf..9b5d7ba166 100644
--- a/src/gallium/drivers/vc4/vc4_screen.c
+++ b/src/gallium/drivers/vc4/vc4_screen.c
@@ -170,6 +170,7 @@ vc4_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
         case PIPE_CAP_SAMPLER_VIEW_TARGET:
         case PIPE_CAP_CLIP_HALFZ:
         case PIPE_CAP_VERTEXID_NOBASE:
+        case PIPE_CAP_POLYGON_OFFSET_CLAMP:
                 return 0;
 
                 /* Stream output. */
diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 6c5703ad46..fd32c4aaea 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -572,7 +572,8 @@ enum pipe_cap {
    PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE = 109,
    PIPE_CAP_SAMPLER_VIEW_TARGET = 110,
    PIPE_CAP_CLIP_HALFZ = 111,
-   PIPE_CAP_VERTEXID_NOBASE,
+   PIPE_CAP_VERTEXID_NOBASE = 112,
+   PIPE_CAP_POLYGON_OFFSET_CLAMP = 113,
 };
 
 #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 (1 << 0)