diff options
Diffstat (limited to 'src/gallium/drivers/svga/svga_pipe_vertex.c')
| -rw-r--r-- | src/gallium/drivers/svga/svga_pipe_vertex.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/src/gallium/drivers/svga/svga_pipe_vertex.c b/src/gallium/drivers/svga/svga_pipe_vertex.c index e34f3a00eeb..d679ad3bdf3 100644 --- a/src/gallium/drivers/svga/svga_pipe_vertex.c +++ b/src/gallium/drivers/svga/svga_pipe_vertex.c @@ -94,6 +94,9 @@ translate_vertex_format(enum pipe_format format) case PIPE_FORMAT_R16G16_FLOAT: return SVGA3D_DECLTYPE_FLOAT16_2; case PIPE_FORMAT_R16G16B16A16_FLOAT: return SVGA3D_DECLTYPE_FLOAT16_4; + /* See attrib_needs_adjustment() below */ + case PIPE_FORMAT_R8G8B8_SNORM: return SVGA3D_DECLTYPE_UBYTE4N; + default: /* There are many formats without hardware support. This case * will be hit regularly, meaning we'll need swvfetch. @@ -103,6 +106,23 @@ translate_vertex_format(enum pipe_format format) } +/** + * Does the given vertex attrib format need range adjustment in the VS? + * Range adjustment scales and biases values from [0,1] to [-1,1]. + * This lets us avoid the swtnl path. + */ +static boolean +attrib_needs_range_adjustment(enum pipe_format format) +{ + switch (format) { + case PIPE_FORMAT_R8G8B8_SNORM: + return TRUE; + default: + return FALSE; + } +} + + static void * svga_create_vertex_elements_state(struct pipe_context *pipe, unsigned count, @@ -117,9 +137,16 @@ svga_create_vertex_elements_state(struct pipe_context *pipe, velems->count = count; memcpy(velems->velem, attribs, sizeof(*attribs) * count); + velems->adjust_attrib_range = 0x0; + /* Translate Gallium vertex format to SVGA3dDeclType */ for (i = 0; i < count; i++) { - velems->decl_type[i] = translate_vertex_format(attribs[i].src_format); + enum pipe_format f = attribs[i].src_format; + velems->decl_type[i] = translate_vertex_format(f); + + if (attrib_needs_range_adjustment(f)) { + velems->adjust_attrib_range |= (1 << i); + } } } return velems; |