+static uint32_t r300_get_border_color(enum pipe_format format,
+ const float border[4],
+ boolean is_r500)
+{
+ const struct util_format_description *desc;
+ float border_swizzled[4] = {0};
+ unsigned i;
+ union util_color uc = {0};
+
+ desc = util_format_description(format);
+
+ /* Do depth formats first. */
+ if (util_format_is_depth_or_stencil(format)) {
+ switch (format) {
+ case PIPE_FORMAT_Z16_UNORM:
+ return util_pack_z(PIPE_FORMAT_Z16_UNORM, border[0]);
+ case PIPE_FORMAT_X8Z24_UNORM:
+ case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
+ if (is_r500) {
+ return util_pack_z(PIPE_FORMAT_X8Z24_UNORM, border[0]);
+ } else {
+ return util_pack_z(PIPE_FORMAT_Z16_UNORM, border[0]) << 16;
+ }
+ default:
+ assert(0);
+ return 0;
+ }
+ }
+
+ /* Apply inverse swizzle of the format. */
+ for (i = 0; i < 4; i++) {
+ switch (desc->swizzle[i]) {
+ case UTIL_FORMAT_SWIZZLE_X:
+ border_swizzled[2] = border[i];
+ break;
+ case UTIL_FORMAT_SWIZZLE_Y:
+ border_swizzled[1] = border[i];
+ break;
+ case UTIL_FORMAT_SWIZZLE_Z:
+ border_swizzled[0] = border[i];
+ break;
+ case UTIL_FORMAT_SWIZZLE_W:
+ border_swizzled[3] = border[i];
+ break;
+ }
+ }
+
+ /* Compressed formats. */
+ if (util_format_is_compressed(format)) {
+ util_pack_color(border_swizzled, PIPE_FORMAT_R8G8B8A8_UNORM, &uc);
+ return uc.ui;
+ }
+
+ switch (desc->channel[0].size) {
+ case 4:
+ util_pack_color(border_swizzled, PIPE_FORMAT_B4G4R4A4_UNORM, &uc);
+ break;
+
+ case 5:
+ if (desc->channel[1].size == 5) {
+ util_pack_color(border_swizzled, PIPE_FORMAT_B5G5R5A1_UNORM, &uc);
+ } else if (desc->channel[1].size == 6) {
+ util_pack_color(border_swizzled, PIPE_FORMAT_B5G6R5_UNORM, &uc);
+ } else {
+ assert(0);
+ }
+ break;
+
+ default:
+ case 8:
+ util_pack_color(border_swizzled, PIPE_FORMAT_B8G8R8A8_UNORM, &uc);
+ break;
+
+ case 10:
+ util_pack_color(border_swizzled, PIPE_FORMAT_B10G10R10A2_UNORM, &uc);
+ break;
+
+ case 16:
+ if (desc->nr_channels <= 2) {
+ border_swizzled[0] = border_swizzled[2];
+ util_pack_color(border_swizzled, PIPE_FORMAT_R16G16_UNORM, &uc);
+ } else {
+ util_pack_color(border_swizzled, PIPE_FORMAT_B8G8R8A8_UNORM, &uc);
+ }
+ break;
+ }
+
+ return uc.ui;
+}
+