softpipe: Enable ARB_framebuffer_no_attachments

Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

docs/GL3.txt

@@ -172,7 +172,7 @@ GL 4.3, GLSL 4.30:
   GL_KHR_debug                                          DONE (all drivers)
   GL_ARB_explicit_uniform_location                      DONE (all drivers that support GLSL)
   GL_ARB_fragment_layer_viewport                        DONE (i965, nv50, nvc0, r600, radeonsi, llvmpipe)
-  GL_ARB_framebuffer_no_attachments                     DONE (i965, nvc0, r600, radeonsi)
+  GL_ARB_framebuffer_no_attachments                     DONE (i965, nvc0, r600, radeonsi, softpipe)
   GL_ARB_internalformat_query2                          DONE (all drivers)
   GL_ARB_invalidate_subdata                             DONE (all drivers)
   GL_ARB_multi_draw_indirect                            DONE (i965, nvc0, r600, radeonsi, llvmpipe, softpipe)
@@ -228,7 +228,7 @@ GLES3.1, GLSL ES 3.1
   GL_ARB_compute_shader                                 DONE (i965)
   GL_ARB_draw_indirect                                  DONE (i965, nvc0, r600, radeonsi, llvmpipe, softpipe)
   GL_ARB_explicit_uniform_location                      DONE (all drivers that support GLSL)
-  GL_ARB_framebuffer_no_attachments                     DONE (i965, nvc0, r600, radeonsi)
+  GL_ARB_framebuffer_no_attachments                     DONE (i965, nvc0, r600, radeonsi, softpipe)
   GL_ARB_program_interface_query                        DONE (all drivers)
   GL_ARB_shader_atomic_counters                         DONE (i965, nvc0, radeonsi, softpipe)
   GL_ARB_shader_image_load_store                        DONE (i965, softpipe, radeonsi)

docs/relnotes/11.3.0.html

@@ -45,7 +45,7 @@ Note: some of the new features are only available with certain drivers.
 
 <ul>
 <li>OpenGL 4.2 on radeonsi</li>
-<li>GL_ARB_framebuffer_no_attachments on nvc0, r600, radeonsi</li>
+<li>GL_ARB_framebuffer_no_attachments on nvc0, r600, radeonsi, softpipe</li>
 <li>GL_ARB_internalformat_query2 on all drivers</li>
 <li>GL_ARB_robust_buffer_access_behavior on radeonsi</li>
 <li>GL_ARB_shader_atomic_counters on radeonsi, softpipe</li>

src/gallium/drivers/softpipe/sp_screen.c

@@ -239,6 +239,8 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
       return 1;
+   case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
+      return 1;
    case PIPE_CAP_VERTEXID_NOBASE:
       return 0;
    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
@@ -269,7 +271,6 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_PCI_BUS:
    case PIPE_CAP_PCI_DEVICE:
    case PIPE_CAP_PCI_FUNCTION:
-   case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
       return 0;
    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT: