gallium: add support for GLES texture float extensions (v3)

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=74329

v2: add a CAP for half floats
    drivers should not expose the CAPs if they don't support the formats

v3: update relnotes

Reviewed-by: Edward O'Callaghan <[email protected]>
Reviewed-by: Roland Scheidegger <[email protected]>

15 files changed, 34 insertions, 0 deletions

diff --git a/src/gallium/docs/source/screen.rst b/src/gallium/docs/source/screen.rst
index dbdccc7fcef..c0b5eb31d05 100644
--- a/src/gallium/docs/source/screen.rst
+++ b/src/gallium/docs/source/screen.rst
@@ -258,6 +258,12 @@ The integer capabilities:
   How many per-patch outputs and inputs are supported between tessellation
   control and tessellation evaluation shaders, not counting in TESSINNER and
   TESSOUTER. The minimum allowed value for OpenGL is 30.
+* ``PIPE_CAP_TEXTURE_FLOAT_LINEAR``: Whether the linear minification and
+  magnification filters are supported with single-precision floating-point
+  textures.
+* ``PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR``: Whether the linear minification and
+  magnification filters are supported with half-precision floating-point
+  textures.
 
 
 .. _pipe_capf:
diff --git a/src/gallium/drivers/freedreno/freedreno_screen.c b/src/gallium/drivers/freedreno/freedreno_screen.c
index 3aeed57b043..295ce7e8187 100644
--- a/src/gallium/drivers/freedreno/freedreno_screen.c
+++ b/src/gallium/drivers/freedreno/freedreno_screen.c
@@ -230,6 +230,8 @@ fd_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_TEXTURE_FLOAT_LINEAR:
+	case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 		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 6083687962f..7608ca5e1a9 100644
--- a/src/gallium/drivers/i915/i915_screen.c
+++ b/src/gallium/drivers/i915/i915_screen.c
@@ -244,6 +244,8 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
+   case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
+   case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
       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 338643e65bb..9f150bbd7b2 100644
--- a/src/gallium/drivers/ilo/ilo_screen.c
+++ b/src/gallium/drivers/ilo/ilo_screen.c
@@ -451,6 +451,8 @@ ilo_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_TEXTURE_GATHER_SM5:
       return 0;
    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
+   case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
+   case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
       return true;
    case PIPE_CAP_FAKE_SW_MSAA:
    case PIPE_CAP_TEXTURE_QUERY_LOD:
diff --git a/src/gallium/drivers/llvmpipe/lp_screen.c b/src/gallium/drivers/llvmpipe/lp_screen.c
index 1c6c82ea115..539bb448bc6 100644
--- a/src/gallium/drivers/llvmpipe/lp_screen.c
+++ b/src/gallium/drivers/llvmpipe/lp_screen.c
@@ -288,6 +288,8 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_VERTEXID_NOBASE:
       return 0;
    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
+   case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
+   case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
       return 1;
    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
diff --git a/src/gallium/drivers/nouveau/nv30/nv30_screen.c b/src/gallium/drivers/nouveau/nv30/nv30_screen.c
index 97cf058ce29..73bcd5b0d3f 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_screen.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_screen.c
@@ -164,6 +164,8 @@ nv30_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_TEXTURE_FLOAT_LINEAR:
+   case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
       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 d869544380a..1e198774593 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_screen.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
@@ -176,6 +176,8 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_CLIP_HALFZ:
    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
+   case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
+   case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
       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 5c382b8bdae..0c25ec43120 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
@@ -175,6 +175,8 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_CLIP_HALFZ:
    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
+   case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
+   case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
       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 f1df79ccb21..74aae379c09 100644
--- a/src/gallium/drivers/r300/r300_screen.c
+++ b/src/gallium/drivers/r300/r300_screen.c
@@ -192,6 +192,8 @@ static int r300_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_TEXTURE_FLOAT_LINEAR:
+        case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
             return 0;
 
         /* SWTCL-only features. */
diff --git a/src/gallium/drivers/r600/r600_pipe.c b/src/gallium/drivers/r600/r600_pipe.c
index c4f5c742b9a..a0fe1d355c9 100644
--- a/src/gallium/drivers/r600/r600_pipe.c
+++ b/src/gallium/drivers/r600/r600_pipe.c
@@ -270,6 +270,8 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_CLIP_HALFZ:
 	case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 	case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
+	case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
+	case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 		return 1;
 
 	case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
index e29b1586107..d60c258709d 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -257,6 +257,8 @@ static int si_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_TGSI_TEXCOORD:
 	case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 	case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
+	case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
+	case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 		return 1;
 
 	case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
diff --git a/src/gallium/drivers/softpipe/sp_screen.c b/src/gallium/drivers/softpipe/sp_screen.c
index ed8e5457f27..49a21d9c06b 100644
--- a/src/gallium/drivers/softpipe/sp_screen.c
+++ b/src/gallium/drivers/softpipe/sp_screen.c
@@ -234,6 +234,8 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
       return 1;
    case PIPE_CAP_CLIP_HALFZ:
+   case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
+   case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
       return 1;
    case PIPE_CAP_VERTEXID_NOBASE:
       return 0;
diff --git a/src/gallium/drivers/svga/svga_screen.c b/src/gallium/drivers/svga/svga_screen.c
index ac5abe8f89d..7b70272a828 100644
--- a/src/gallium/drivers/svga/svga_screen.c
+++ b/src/gallium/drivers/svga/svga_screen.c
@@ -310,6 +310,8 @@ svga_get_param(struct pipe_screen *screen, 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_TEXTURE_FLOAT_LINEAR:
+   case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
       return 0;
    }
 
diff --git a/src/gallium/drivers/vc4/vc4_screen.c b/src/gallium/drivers/vc4/vc4_screen.c
index a20818da4d2..72f08262b66 100644
--- a/src/gallium/drivers/vc4/vc4_screen.c
+++ b/src/gallium/drivers/vc4/vc4_screen.c
@@ -177,6 +177,8 @@ vc4_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_TEXTURE_FLOAT_LINEAR:
+	case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
                 return 0;
 
                 /* Stream output. */
diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 85328264cc3..83a3e2bb377 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -607,6 +607,8 @@ enum pipe_cap
    PIPE_CAP_RESOURCE_FROM_USER_MEMORY,
    PIPE_CAP_DEVICE_RESET_STATUS_QUERY,
    PIPE_CAP_MAX_SHADER_PATCH_VARYINGS,
+   PIPE_CAP_TEXTURE_FLOAT_LINEAR,
+   PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR,
 };
 
 #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 (1 << 0)