gallium: add PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

src/gallium/docs/source/screen.rst

@@ -93,6 +93,12 @@ The integer capabilities:
   shader.
 * ``PIPE_CAP_GLSL_FEATURE_LEVEL``: Whether the driver supports features
   equivalent to a specific GLSL version. E.g. for GLSL 1.3, report 130.
+* ``PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY``: Whether the driver supports
+  features equivalent to a specific GLSL version including all legacy OpenGL
+  features only present in the OpenGL compatibility profile.
+  The only legacy features that Gallium drivers must implement are
+  the legacy shader inputs and outputs (colors, texcoords, fog, clipvertex,
+  edgeflag).
 * ``PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION``: Whether quads adhere to
   the flatshade_first setting in ``pipe_rasterizer_state``.
 * ``PIPE_CAP_USER_VERTEX_BUFFERS``: Whether the driver supports user vertex

src/gallium/drivers/etnaviv/etnaviv_screen.c

@@ -154,6 +154,7 @@ etna_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
       return 4; /* XXX could easily be supported */
    case PIPE_CAP_GLSL_FEATURE_LEVEL:
+   case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
       return 120;
 
    case PIPE_CAP_NPOT_TEXTURES:

src/gallium/drivers/freedreno/freedreno_screen.c

@@ -261,6 +261,7 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 		return 64;
 
 	case PIPE_CAP_GLSL_FEATURE_LEVEL:
+	case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
 		if (glsl120)
 			return 120;
 		return is_ir3(screen) ? 140 : 120;

src/gallium/drivers/i915/i915_screen.c

@@ -342,6 +342,7 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
       return 64;
 
    case PIPE_CAP_GLSL_FEATURE_LEVEL:
+   case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
       return 120;
 
    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:

src/gallium/drivers/llvmpipe/lp_screen.c

@@ -205,6 +205,8 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 1;
    case PIPE_CAP_GLSL_FEATURE_LEVEL:
       return 330;
+   case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
+      return 140;
    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
       return 0;
    case PIPE_CAP_COMPUTE:

src/gallium/drivers/nouveau/nv30/nv30_screen.c

@@ -64,6 +64,7 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
       return 13;
    case PIPE_CAP_GLSL_FEATURE_LEVEL:
+   case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
       return 120;
    case PIPE_CAP_ENDIANNESS:
       return PIPE_ENDIAN_LITTLE;

src/gallium/drivers/nouveau/nv50/nv50_screen.c

@@ -109,6 +109,8 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
       return 128 * 1024 * 1024;
    case PIPE_CAP_GLSL_FEATURE_LEVEL:
       return 330;
+   case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
+      return 140;
    case PIPE_CAP_MAX_RENDER_TARGETS:
       return 8;
    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:

src/gallium/drivers/nouveau/nvc0/nvc0_screen.c

@@ -134,6 +134,8 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
       return 128 * 1024 * 1024;
    case PIPE_CAP_GLSL_FEATURE_LEVEL:
       return 430;
+   case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
+      return 140;
    case PIPE_CAP_MAX_RENDER_TARGETS:
       return 8;
    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:

src/gallium/drivers/r300/r300_screen.c

@@ -120,6 +120,7 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
             return 16;
 
         case PIPE_CAP_GLSL_FEATURE_LEVEL:
+        case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
             return 120;
 
         /* r300 cannot do swizzling of compressed textures. Supported otherwise. */

src/gallium/drivers/r600/r600_pipe.c

@@ -343,6 +343,9 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 		   return 330;
 		return 140;
 
+	case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
+		return 140;
+
 	/* Supported except the original R600. */
 	case PIPE_CAP_INDEP_BLEND_ENABLE:
 	case PIPE_CAP_INDEP_BLEND_FUNC:

src/gallium/drivers/radeonsi/si_get.c

@@ -214,6 +214,9 @@ static int si_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 			return 450;
 		return 420;
 
+	case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
+		return 140;
+
 	case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 		return MIN2(sscreen->info.max_alloc_size, INT_MAX);
 

src/gallium/drivers/softpipe/sp_screen.c

@@ -151,6 +151,8 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 0;
    case PIPE_CAP_GLSL_FEATURE_LEVEL:
       return 330;
+   case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
+      return 140;
    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
    case PIPE_CAP_TGSI_TEX_TXF_LZ:
       return 0;

src/gallium/drivers/svga/svga_screen.c

@@ -278,6 +278,9 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_GLSL_FEATURE_LEVEL:
       return sws->have_vgpu10 ? 330 : 120;
 
+   case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
+      return sws->have_vgpu10 ? 140 : 120;
+
    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
       return 0;
 

src/gallium/drivers/swr/swr_screen.cpp

@@ -183,6 +183,8 @@ swr_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 7;
    case PIPE_CAP_GLSL_FEATURE_LEVEL:
       return 330;
+   case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
+      return 140;
    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
       return 16;
    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:

src/gallium/drivers/v3d/v3d_screen.c

@@ -123,6 +123,9 @@ v3d_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
         case PIPE_CAP_GLSL_FEATURE_LEVEL:
                 return 400;
 
+	case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
+		return 140;
+
         case PIPE_CAP_MAX_VIEWPORTS:
                 return 1;
 

src/gallium/drivers/vc4/vc4_screen.c

@@ -164,6 +164,7 @@ vc4_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
                 return 256;
 
         case PIPE_CAP_GLSL_FEATURE_LEVEL:
+	case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
                 return 120;
 
         case PIPE_CAP_MAX_VIEWPORTS:

src/gallium/drivers/virgl/virgl_screen.c

@@ -133,6 +133,8 @@ virgl_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 1;
    case PIPE_CAP_GLSL_FEATURE_LEVEL:
       return vscreen->caps.caps.v1.glsl_level;
+   case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
+      return MIN2(vscreen->caps.caps.v1.glsl_level, 140);
    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
       return 0;
    case PIPE_CAP_COMPUTE:

src/gallium/include/pipe/p_defines.h

@@ -686,6 +686,7 @@ enum pipe_cap
    PIPE_CAP_VERTEX_COLOR_UNCLAMPED,
    PIPE_CAP_VERTEX_COLOR_CLAMPED,
    PIPE_CAP_GLSL_FEATURE_LEVEL,
+   PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY,
    PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION,
    PIPE_CAP_USER_VERTEX_BUFFERS,
    PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY,