gallium/util: add util_format_snorm8_to_sint8 (from radeonsi)

2 files changed, 43 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/util/u_format.c b/src/gallium/auxiliary/util/u_format.c
index 231e89017b4..862061a8ec2 100644
--- a/src/gallium/auxiliary/util/u_format.c
+++ b/src/gallium/auxiliary/util/u_format.c
@@ -886,3 +886,43 @@ void util_format_unswizzle_4f(float *dst, const float *src,
       }
    }
 }
+
+enum pipe_format
+util_format_snorm8_to_sint8(enum pipe_format format)
+{
+   switch (format) {
+   case PIPE_FORMAT_R8_SNORM:
+      return PIPE_FORMAT_R8_SINT;
+   case PIPE_FORMAT_R8G8_SNORM:
+      return PIPE_FORMAT_R8G8_SINT;
+   case PIPE_FORMAT_R8G8B8_SNORM:
+      return PIPE_FORMAT_R8G8B8_SINT;
+   case PIPE_FORMAT_R8G8B8A8_SNORM:
+      return PIPE_FORMAT_R8G8B8A8_SINT;
+
+   case PIPE_FORMAT_A8_SNORM:
+      return PIPE_FORMAT_A8_SINT;
+   case PIPE_FORMAT_L8_SNORM:
+      return PIPE_FORMAT_L8_SINT;
+   case PIPE_FORMAT_L8A8_SNORM:
+      return PIPE_FORMAT_L8A8_SINT;
+   case PIPE_FORMAT_I8_SNORM:
+      return PIPE_FORMAT_I8_SINT;
+
+   case PIPE_FORMAT_R8G8B8X8_SNORM:
+      return PIPE_FORMAT_R8G8B8X8_SINT;
+   case PIPE_FORMAT_R8A8_SNORM:
+      return PIPE_FORMAT_R8A8_SINT;
+   case PIPE_FORMAT_A8L8_SNORM:
+      return PIPE_FORMAT_A8L8_SINT;
+   case PIPE_FORMAT_G8R8_SNORM:
+      return PIPE_FORMAT_G8R8_SINT;
+   case PIPE_FORMAT_A8B8G8R8_SNORM:
+      return PIPE_FORMAT_A8B8G8R8_SINT;
+   case PIPE_FORMAT_X8B8G8R8_SNORM:
+      return PIPE_FORMAT_X8B8G8R8_SINT;
+
+   default:
+      return format;
+   }
+}
diff --git a/src/gallium/auxiliary/util/u_format.h b/src/gallium/auxiliary/util/u_format.h
index 8dcc438a4a1..0c0c505e391 100644
--- a/src/gallium/auxiliary/util/u_format.h
+++ b/src/gallium/auxiliary/util/u_format.h
@@ -1358,6 +1358,9 @@ void pipe_swizzle_4f(float *dst, const float *src,
 void util_format_unswizzle_4f(float *dst, const float *src,
                               const unsigned char swz[4]);
 
+enum pipe_format
+util_format_snorm8_to_sint8(enum pipe_format format);
+
 #ifdef __cplusplus
 } // extern "C" {
 #endif