llvmpipe: whole image tile/untile functions

1 files changed, 126 insertions, 0 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_tile_image.c b/src/gallium/drivers/llvmpipe/lp_tile_image.c
new file mode 100644
index 0000000000..c1980b316d
--- /dev/null
+++ b/src/gallium/drivers/llvmpipe/lp_tile_image.c
@@ -0,0 +1,126 @@
+/**************************************************************************
+ * 
+ * Copyright 2010 VMware, Inc.  All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+
+#include "lp_tile_soa.h"
+#include "lp_tile_image.h"
+
+
+#define BYTES_PER_TILE (TILE_SIZE * TILE_SIZE * 4)
+
+
+/**
+ * Convert a tiled image into a linear image.
+ * \param src_stride  source row stride in bytes (bytes per row of tiles)
+ * \param dst_stride  dest row stride in bytes
+ */
+void
+lp_tiled_to_linear(const uint8_t *src,
+                   uint8_t *dst,
+                   unsigned width, unsigned height,
+                   enum pipe_format format,
+                   unsigned src_stride,
+                   unsigned dst_stride)
+{
+   const unsigned tiles_per_row = src_stride / BYTES_PER_TILE;
+   unsigned i, j;
+
+   for (j = 0; j < height; j += TILE_SIZE) {
+      for (i = 0; i < width; i += TILE_SIZE) {
+         unsigned tile_offset =
+            ((j / TILE_SIZE) * tiles_per_row + i / TILE_SIZE);
+         unsigned byte_offset = tile_offset * BYTES_PER_TILE;
+         const uint8_t *src_tile = src + byte_offset;
+
+         lp_tile_write_4ub(format,
+                           src_tile,
+                           dst,
+                           dst_stride,
+                           i, j, TILE_SIZE, TILE_SIZE);
+      }
+   }
+}
+
+
+/**
+ * Convert a linear image into a tiled image.
+ * \param src_stride  source row stride in bytes
+ * \param dst_stride  dest row stride in bytes (bytes per row of tiles)
+ */
+void
+lp_linear_to_tiled(const uint8_t *src,
+                   uint8_t *dst,
+                   unsigned width, unsigned height,
+                   enum pipe_format format,
+                   unsigned src_stride,
+                   unsigned dst_stride)
+{
+   const unsigned tiles_per_row = dst_stride / BYTES_PER_TILE;
+   unsigned i, j;
+
+   for (j = 0; j < height; j += TILE_SIZE) {
+      for (i = 0; i < width; i += TILE_SIZE) {
+         unsigned tile_offset =
+            ((j / TILE_SIZE) * tiles_per_row + i / TILE_SIZE);
+         unsigned byte_offset = tile_offset * BYTES_PER_TILE;
+         uint8_t *dst_tile = dst + byte_offset;
+
+         lp_tile_read_4ub(format,
+                          dst_tile,
+                          src,
+                          src_stride,
+                          i, j, TILE_SIZE, TILE_SIZE);
+      }
+   }
+}
+
+
+/**
+ * For testing only.
+ */
+void
+test_tiled_linear_conversion(uint8_t *data,
+                             enum pipe_format format,
+                             unsigned width, unsigned height,
+                             unsigned stride)
+{
+   /* size in tiles */
+   unsigned wt = (width + TILE_SIZE - 1) / TILE_SIZE;
+   unsigned ht = (height + TILE_SIZE - 1) / TILE_SIZE;
+
+   uint8_t *tiled = malloc(wt * ht * TILE_SIZE * TILE_SIZE * 4);
+
+   unsigned tiled_stride = wt * TILE_SIZE * TILE_SIZE * 4;
+
+   lp_linear_to_tiled(data, tiled, width, height, format,
+                      stride, tiled_stride);
+
+   lp_tiled_to_linear(tiled, data, width, height, format,
+                      tiled_stride, stride);
+
+   free(tiled);
+}
+