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/**************************************************************************
*
* 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);
}
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