util/format: add some ZS helpers for vallium

[mesa.git] / src / util / format / u_format_zs.c

diff --git a/src/util/format/u_format_zs.c b/src/util/format/u_format_zs.c
index bbd7e02e563273a8a03e86c844e5d952bf66715a..197e881dbc0a44d70c3c1cd38f9918042fc6f89a 100644 (file)
--- a/src/util/format/u_format_zs.c
+++ b/src/util/format/u_format_zs.c
@@ -419,6 +419,46 @@ util_format_z24_unorm_s8_uint_pack_z_float(uint8_t *dst_row, unsigned dst_stride
    }
 }
 
+
+void
+util_format_z24_unorm_s8_uint_unpack_z24(uint8_t *dst_row, unsigned dst_stride,
+                                         const uint8_t *src_row, unsigned src_stride,
+                                         unsigned width, unsigned height)
+{
+   unsigned x, y;
+   for(y = 0; y < height; ++y) {
+      uint32_t *dst = (uint32_t *)dst_row;
+      const uint32_t *src = (const uint32_t *)src_row;
+      for(x = 0; x < width; ++x) {
+         uint32_t value =  util_cpu_to_le32(*src++);
+         *dst++ = (value & 0xffffff);
+      }
+      src_row += src_stride/sizeof(*src_row);
+      dst_row += dst_stride/sizeof(*dst_row);
+   }
+}
+
+void
+util_format_z24_unorm_s8_uint_pack_z24(uint8_t *dst_row, unsigned dst_stride,
+                                       const uint8_t *src_row, unsigned src_stride,
+                                       unsigned width, unsigned height)
+{
+   unsigned x, y;
+   for(y = 0; y < height; ++y) {
+      const uint32_t *src = (const uint32_t *)src_row;
+      uint32_t *dst = (uint32_t *)dst_row;
+      for(x = 0; x < width; ++x) {
+         uint32_t value = util_le32_to_cpu(*dst);
+         value &= 0xff000000;
+         value |= *src & 0xffffff;
+         src++;
+         *dst++ = util_cpu_to_le32(value);
+      }
+      dst_row += dst_stride/sizeof(*dst_row);
+      src_row += src_stride/sizeof(*src_row);
+   }
+}
+
 void
 util_format_z24_unorm_s8_uint_unpack_z_32unorm(uint32_t *dst_row, unsigned dst_stride,
                                                   const uint8_t *src_row, unsigned src_stride,