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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.
*
**************************************************************************/
/**
* Code to convert images from tiled to linear and back.
* XXX there are quite a few assumptions about color and z/stencil being
* 32bpp.
*/
#include "util/u_format.h"
#include "util/u_memory.h"
#include "lp_limits.h"
#include "lp_tile_image.h"
#define BYTES_PER_TILE (TILE_SIZE * TILE_SIZE * 4)
/**
* Untile a 4x4 block of 32-bit words (all contiguous) to linear layout
* at dst, with dst_stride words between rows.
*/
static void
untile_4_4_uint32(const uint32_t *src, uint32_t *dst, unsigned dst_stride)
{
uint32_t *d0 = dst;
uint32_t *d1 = d0 + dst_stride;
uint32_t *d2 = d1 + dst_stride;
uint32_t *d3 = d2 + dst_stride;
d0[0] = src[0]; d0[1] = src[1]; d0[2] = src[4]; d0[3] = src[5];
d1[0] = src[2]; d1[1] = src[3]; d1[2] = src[6]; d1[3] = src[7];
d2[0] = src[8]; d2[1] = src[9]; d2[2] = src[12]; d2[3] = src[13];
d3[0] = src[10]; d3[1] = src[11]; d3[2] = src[14]; d3[3] = src[15];
}
/**
* Untile a 4x4 block of 16-bit words (all contiguous) to linear layout
* at dst, with dst_stride words between rows.
*/
static void
untile_4_4_uint16(const uint16_t *src, uint16_t *dst, unsigned dst_stride)
{
uint16_t *d0 = dst;
uint16_t *d1 = d0 + dst_stride;
uint16_t *d2 = d1 + dst_stride;
uint16_t *d3 = d2 + dst_stride;
d0[0] = src[0]; d0[1] = src[1]; d0[2] = src[4]; d0[3] = src[5];
d1[0] = src[2]; d1[1] = src[3]; d1[2] = src[6]; d1[3] = src[7];
d2[0] = src[8]; d2[1] = src[9]; d2[2] = src[12]; d2[3] = src[13];
d3[0] = src[10]; d3[1] = src[11]; d3[2] = src[14]; d3[3] = src[15];
}
/**
* Convert a 4x4 rect of 32-bit words from a linear layout into tiled
* layout (in which all 16 words are contiguous).
*/
static void
tile_4_4_uint32(const uint32_t *src, uint32_t *dst, unsigned src_stride)
{
const uint32_t *s0 = src;
const uint32_t *s1 = s0 + src_stride;
const uint32_t *s2 = s1 + src_stride;
const uint32_t *s3 = s2 + src_stride;
dst[0] = s0[0]; dst[1] = s0[1]; dst[4] = s0[2]; dst[5] = s0[3];
dst[2] = s1[0]; dst[3] = s1[1]; dst[6] = s1[2]; dst[7] = s1[3];
dst[8] = s2[0]; dst[9] = s2[1]; dst[12] = s2[2]; dst[13] = s2[3];
dst[10] = s3[0]; dst[11] = s3[1]; dst[14] = s3[2]; dst[15] = s3[3];
}
/**
* Convert a 4x4 rect of 16-bit words from a linear layout into tiled
* layout (in which all 16 words are contiguous).
*/
static void
tile_4_4_uint16(const uint16_t *src, uint16_t *dst, unsigned src_stride)
{
const uint16_t *s0 = src;
const uint16_t *s1 = s0 + src_stride;
const uint16_t *s2 = s1 + src_stride;
const uint16_t *s3 = s2 + src_stride;
dst[0] = s0[0]; dst[1] = s0[1]; dst[4] = s0[2]; dst[5] = s0[3];
dst[2] = s1[0]; dst[3] = s1[1]; dst[6] = s1[2]; dst[7] = s1[3];
dst[8] = s2[0]; dst[9] = s2[1]; dst[12] = s2[2]; dst[13] = s2[3];
dst[10] = s3[0]; dst[11] = s3[1]; dst[14] = s3[2]; dst[15] = s3[3];
}
/**
* Convert a tiled image into a linear image.
* \param dst_stride dest row stride in bytes
*/
void
lp_tiled_to_linear(const void *src, void *dst,
unsigned x, unsigned y,
unsigned width, unsigned height,
enum pipe_format format,
unsigned dst_stride,
unsigned tiles_per_row)
{
assert(x % TILE_SIZE == 0);
assert(y % TILE_SIZE == 0);
/*assert(width % TILE_SIZE == 0);
assert(height % TILE_SIZE == 0);*/
/* Note that Z/stencil surfaces use a different tiling size than
* color surfaces.
*/
if (util_format_is_depth_or_stencil(format)) {
const uint bpp = util_format_get_blocksize(format);
const uint src_stride = dst_stride * TILE_VECTOR_WIDTH;
const uint tile_w = TILE_VECTOR_WIDTH, tile_h = TILE_VECTOR_HEIGHT;
const uint tiles_per_row = src_stride / (tile_w * tile_h * bpp);
dst_stride /= bpp; /* convert from bytes to words */
if (bpp == 4) {
const uint32_t *src32 = (const uint32_t *) src;
uint32_t *dst32 = (uint32_t *) dst;
uint i, j;
for (j = 0; j < height; j += tile_h) {
for (i = 0; i < width; i += tile_w) {
/* compute offsets in 32-bit words */
uint ii = i + x, jj = j + y;
uint src_offset = (jj / tile_h * tiles_per_row + ii / tile_w)
* (tile_w * tile_h);
uint dst_offset = jj * dst_stride + ii;
untile_4_4_uint32(src32 + src_offset,
dst32 + dst_offset,
dst_stride);
}
}
}
else {
const uint16_t *src16 = (const uint16_t *) src;
uint16_t *dst16 = (uint16_t *) dst;
uint i, j;
assert(bpp == 2);
for (j = 0; j < height; j += tile_h) {
for (i = 0; i < width; i += tile_w) {
/* compute offsets in 16-bit words */
uint ii = i + x, jj = j + y;
uint src_offset = (jj / tile_h * tiles_per_row + ii / tile_w)
* (tile_w * tile_h);
uint dst_offset = jj * dst_stride + ii;
untile_4_4_uint16(src16 + src_offset,
dst16 + dst_offset,
dst_stride);
}
}
}
}
else {
assert(0);
}
}
/**
* Convert a linear image into a tiled image.
* \param src_stride source row stride in bytes
*/
void
lp_linear_to_tiled(const void *src, void *dst,
unsigned x, unsigned y,
unsigned width, unsigned height,
enum pipe_format format,
unsigned src_stride,
unsigned tiles_per_row)
{
assert(x % TILE_SIZE == 0);
assert(y % TILE_SIZE == 0);
/*
assert(width % TILE_SIZE == 0);
assert(height % TILE_SIZE == 0);
*/
if (util_format_is_depth_or_stencil(format)) {
const uint bpp = util_format_get_blocksize(format);
const uint dst_stride = src_stride * TILE_VECTOR_WIDTH;
const uint tile_w = TILE_VECTOR_WIDTH, tile_h = TILE_VECTOR_HEIGHT;
const uint tiles_per_row = dst_stride / (tile_w * tile_h * bpp);
src_stride /= bpp; /* convert from bytes to words */
if (bpp == 4) {
const uint32_t *src32 = (const uint32_t *) src;
uint32_t *dst32 = (uint32_t *) dst;
uint i, j;
for (j = 0; j < height; j += tile_h) {
for (i = 0; i < width; i += tile_w) {
/* compute offsets in 32-bit words */
uint ii = i + x, jj = j + y;
uint src_offset = jj * src_stride + ii;
uint dst_offset = (jj / tile_h * tiles_per_row + ii / tile_w)
* (tile_w * tile_h);
tile_4_4_uint32(src32 + src_offset,
dst32 + dst_offset,
src_stride);
}
}
}
else {
const uint16_t *src16 = (const uint16_t *) src;
uint16_t *dst16 = (uint16_t *) dst;
uint i, j;
assert(bpp == 2);
for (j = 0; j < height; j += tile_h) {
for (i = 0; i < width; i += tile_w) {
/* compute offsets in 16-bit words */
uint ii = i + x, jj = j + y;
uint src_offset = jj * src_stride + ii;
uint dst_offset = (jj / tile_h * tiles_per_row + ii / tile_w)
* (tile_w * tile_h);
tile_4_4_uint16(src16 + src_offset,
dst16 + dst_offset,
src_stride);
}
}
}
}
else {
assert(0);
}
}
/**
* For testing only.
*/
void
test_tiled_linear_conversion(void *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, 0, 0, width, height, format,
stride, wt);
lp_tiled_to_linear(tiled, data, 0, 0, width, height, format,
stride, wt);
FREE(tiled);
}
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