Mesa (master): gallium/util: support translating between uint and sint formats

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Module: Mesa
Branch: master
Commit: 749bbd39c719a600cd2555932bb47aa73ca42336
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=749bbd39c719a600cd2555932bb47aa73ca42336

Author: Erik Faye-Lund <erik.faye-lund at collabora.com>
Date:   Tue Mar 12 21:17:59 2019 +0100

gallium/util: support translating between uint and sint formats

Without this, we can't for instance convert between r8_sint and
r8g8b8a8_sint. But that's pretty useful, so let's support it as well.

Signed-off-by: Erik Faye-Lund <erik.faye-lund at collabora.com>
Reviewed-by: Gurchetan Singh <gurchetansingh at chromium.org>

---

 src/gallium/auxiliary/util/u_format.c | 62 +++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/src/gallium/auxiliary/util/u_format.c b/src/gallium/auxiliary/util/u_format.c
index 3a61d54f726..5d3ee861a73 100644
--- a/src/gallium/auxiliary/util/u_format.c
+++ b/src/gallium/auxiliary/util/u_format.c
@@ -716,6 +716,68 @@ util_format_translate(enum pipe_format dst_format,
 
       FREE(tmp_row);
    }
+   else if (util_format_is_pure_sint(src_format) ||
+            util_format_is_pure_sint(dst_format)) {
+      unsigned tmp_stride;
+      int *tmp_row;
+
+      if (!src_format_desc->unpack_rgba_sint ||
+          !dst_format_desc->pack_rgba_sint) {
+         return FALSE;
+      }
+
+      tmp_stride = MAX2(width, x_step) * 4 * sizeof *tmp_row;
+      tmp_row = MALLOC(y_step * tmp_stride);
+      if (!tmp_row)
+         return FALSE;
+
+      while (height >= y_step) {
+         src_format_desc->unpack_rgba_sint(tmp_row, tmp_stride, src_row, src_stride, width, y_step);
+         dst_format_desc->pack_rgba_sint(dst_row, dst_stride, tmp_row, tmp_stride, width, y_step);
+
+         dst_row += dst_step;
+         src_row += src_step;
+         height -= y_step;
+      }
+
+      if (height) {
+         src_format_desc->unpack_rgba_sint(tmp_row, tmp_stride, src_row, src_stride, width, height);
+         dst_format_desc->pack_rgba_sint(dst_row, dst_stride, tmp_row, tmp_stride, width, height);
+      }
+
+      FREE(tmp_row);
+   }
+   else if (util_format_is_pure_uint(src_format) ||
+            util_format_is_pure_uint(dst_format)) {
+      unsigned tmp_stride;
+      unsigned int *tmp_row;
+
+      if (!src_format_desc->unpack_rgba_uint ||
+          !dst_format_desc->pack_rgba_uint) {
+         return FALSE;
+      }
+
+      tmp_stride = MAX2(width, x_step) * 4 * sizeof *tmp_row;
+      tmp_row = MALLOC(y_step * tmp_stride);
+      if (!tmp_row)
+         return FALSE;
+
+      while (height >= y_step) {
+         src_format_desc->unpack_rgba_uint(tmp_row, tmp_stride, src_row, src_stride, width, y_step);
+         dst_format_desc->pack_rgba_uint(dst_row, dst_stride, tmp_row, tmp_stride, width, y_step);
+
+         dst_row += dst_step;
+         src_row += src_step;
+         height -= y_step;
+      }
+
+      if (height) {
+         src_format_desc->unpack_rgba_uint(tmp_row, tmp_stride, src_row, src_stride, width, height);
+         dst_format_desc->pack_rgba_uint(dst_row, dst_stride, tmp_row, tmp_stride, width, height);
+      }
+
+      FREE(tmp_row);
+   }
    else {
       unsigned tmp_stride;
       float *tmp_row;