wined3d: Add support for WINED3DFMT_BC4_SNORM format.

dlls/wined3d/utils.c

@@ -268,6 +268,7 @@ static const struct wined3d_typed_format_info typed_formats[] =
     {WINED3DFMT_BC3_UNORM_SRGB,           WINED3DFMT_BC3_TYPELESS,          ""},
     {WINED3DFMT_BC3_UNORM,                WINED3DFMT_BC3_TYPELESS,          ""},
     {WINED3DFMT_BC4_UNORM,                WINED3DFMT_BC4_TYPELESS,          ""},
+    {WINED3DFMT_BC4_SNORM,                WINED3DFMT_BC4_TYPELESS,          ""},
     {WINED3DFMT_BC5_UNORM,                WINED3DFMT_BC5_TYPELESS,          ""},
     {WINED3DFMT_BC5_SNORM,                WINED3DFMT_BC5_TYPELESS,          ""},
     {WINED3DFMT_BC6H_UF16,                WINED3DFMT_BC6H_TYPELESS,         ""},
@@ -361,6 +362,7 @@ static const struct wined3d_format_block_info format_block_info[] =
     {WINED3DFMT_BC2_UNORM, 4,  4,  16, TRUE},
     {WINED3DFMT_BC3_UNORM, 4,  4,  16, TRUE},
     {WINED3DFMT_BC4_UNORM, 4,  4,  8,  TRUE},
+    {WINED3DFMT_BC4_SNORM, 4,  4,  8,  TRUE},
     {WINED3DFMT_BC5_UNORM, 4,  4,  16, TRUE},
     {WINED3DFMT_BC5_SNORM, 4,  4,  16, TRUE},
     {WINED3DFMT_BC6H_UF16, 4,  4,  16, TRUE},
@@ -1179,6 +1181,11 @@ static const struct wined3d_format_texture_info format_texture_info[] =
             WINED3DFMT_FLAG_TEXTURE | WINED3DFMT_FLAG_POSTPIXELSHADER_BLENDING | WINED3DFMT_FLAG_FILTERING
             | WINED3DFMT_FLAG_COMPRESSED,
             ARB_TEXTURE_COMPRESSION_RGTC, NULL},
+    {WINED3DFMT_BC4_SNORM,              GL_COMPRESSED_SIGNED_RED_RGTC1,   GL_COMPRESSED_SIGNED_RED_RGTC1,         0,
+            GL_RED,                     GL_UNSIGNED_BYTE,                 0,
+            WINED3DFMT_FLAG_TEXTURE | WINED3DFMT_FLAG_POSTPIXELSHADER_BLENDING | WINED3DFMT_FLAG_FILTERING
+            | WINED3DFMT_FLAG_COMPRESSED,
+            ARB_TEXTURE_COMPRESSION_RGTC, NULL},
     {WINED3DFMT_BC5_UNORM,              GL_COMPRESSED_RG_RGTC2,           GL_COMPRESSED_RG_RGTC2,                 0,
             GL_RG,                      GL_UNSIGNED_BYTE,                 0,
             WINED3DFMT_FLAG_TEXTURE | WINED3DFMT_FLAG_POSTPIXELSHADER_BLENDING | WINED3DFMT_FLAG_FILTERING
@@ -3434,6 +3441,8 @@ static void apply_format_fixups(struct wined3d_adapter *adapter, struct wined3d_
     gl_info->formats[idx].flags[WINED3D_GL_RES_TYPE_TEX_3D] &= ~WINED3DFMT_FLAG_TEXTURE;
     idx = get_format_idx(WINED3DFMT_BC4_UNORM);
     gl_info->formats[idx].flags[WINED3D_GL_RES_TYPE_TEX_3D] &= ~WINED3DFMT_FLAG_TEXTURE;
+    idx = get_format_idx(WINED3DFMT_BC4_SNORM);
+    gl_info->formats[idx].flags[WINED3D_GL_RES_TYPE_TEX_3D] &= ~WINED3DFMT_FLAG_TEXTURE;
     idx = get_format_idx(WINED3DFMT_BC5_UNORM);
     gl_info->formats[idx].flags[WINED3D_GL_RES_TYPE_TEX_3D] &= ~WINED3DFMT_FLAG_TEXTURE;
     idx = get_format_idx(WINED3DFMT_BC5_SNORM);