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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 VMWARE 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.
*
**************************************************************************/
/**
* @file
* Pixel format accessor functions.
*
* @author Jose Fonseca <jfonseca@vmware.com>
*/
#include "u_math.h"
#include "u_memory.h"
#include "u_rect.h"
#include "u_format.h"
void
util_format_read_4f(enum pipe_format format,
float *dst, unsigned dst_stride,
const void *src, unsigned src_stride,
unsigned x, unsigned y, unsigned w, unsigned h)
{
const struct util_format_description *format_desc;
const uint8_t *src_row;
float *dst_row;
format_desc = util_format_description(format);
assert(x % format_desc->block.width == 0);
assert(y % format_desc->block.height == 0);
src_row = (const uint8_t *)src + y*src_stride + x*(format_desc->block.bits/8);
dst_row = dst;
format_desc->unpack_float(dst_row, dst_stride, src_row, src_stride, w, h);
}
void
util_format_write_4f(enum pipe_format format,
const float *src, unsigned src_stride,
void *dst, unsigned dst_stride,
unsigned x, unsigned y, unsigned w, unsigned h)
{
const struct util_format_description *format_desc;
uint8_t *dst_row;
const float *src_row;
format_desc = util_format_description(format);
assert(x % format_desc->block.width == 0);
assert(y % format_desc->block.height == 0);
dst_row = (uint8_t *)dst + y*dst_stride + x*(format_desc->block.bits/8);
src_row = src;
format_desc->pack_float(dst_row, dst_stride, src_row, src_stride, w, h);
}
void
util_format_read_4ub(enum pipe_format format, uint8_t *dst, unsigned dst_stride, const void *src, unsigned src_stride, unsigned x, unsigned y, unsigned w, unsigned h)
{
const struct util_format_description *format_desc;
const uint8_t *src_row;
uint8_t *dst_row;
format_desc = util_format_description(format);
assert(x % format_desc->block.width == 0);
assert(y % format_desc->block.height == 0);
src_row = (const uint8_t *)src + y*src_stride + x*(format_desc->block.bits/8);
dst_row = dst;
format_desc->unpack_8unorm(dst_row, dst_stride, src_row, src_stride, w, h);
}
void
util_format_write_4ub(enum pipe_format format, const uint8_t *src, unsigned src_stride, void *dst, unsigned dst_stride, unsigned x, unsigned y, unsigned w, unsigned h)
{
const struct util_format_description *format_desc;
uint8_t *dst_row;
const uint8_t *src_row;
format_desc = util_format_description(format);
assert(x % format_desc->block.width == 0);
assert(y % format_desc->block.height == 0);
dst_row = (uint8_t *)dst + y*dst_stride + x*(format_desc->block.bits/8);
src_row = src;
format_desc->pack_8unorm(dst_row, dst_stride, src_row, src_stride, w, h);
}
static INLINE boolean
util_format_fits_8unorm(const struct util_format_description *format_desc)
{
unsigned chan;
switch (format_desc->layout) {
case UTIL_FORMAT_LAYOUT_S3TC:
case UTIL_FORMAT_LAYOUT_RGTC:
/*
* These are straight forward.
*/
return TRUE;
case UTIL_FORMAT_LAYOUT_PLAIN:
/*
* For these we can find a generic rule.
*/
for (chan = 0; chan < format_desc->nr_channels; ++chan) {
switch (format_desc->channel[chan].type) {
case UTIL_FORMAT_TYPE_VOID:
break;
case UTIL_FORMAT_TYPE_UNSIGNED:
if (!format_desc->channel[chan].normalized ||
format_desc->channel[chan].size > 8) {
return FALSE;
}
default:
return FALSE;
}
}
return TRUE;
default:
/*
* Handle all others on a case by case basis.
*/
switch (format_desc->format) {
case PIPE_FORMAT_R1_UNORM:
case PIPE_FORMAT_UYVY:
case PIPE_FORMAT_YUYV:
case PIPE_FORMAT_R8G8_B8G8_UNORM:
case PIPE_FORMAT_G8R8_G8B8_UNORM:
return TRUE;
default:
return FALSE;
}
}
}
void
util_format_translate(enum pipe_format dst_format,
void *dst, unsigned dst_stride,
unsigned dst_x, unsigned dst_y,
enum pipe_format src_format,
const void *src, unsigned src_stride,
unsigned src_x, unsigned src_y,
unsigned width, unsigned height)
{
const struct util_format_description *dst_format_desc;
const struct util_format_description *src_format_desc;
uint8_t *dst_row;
const uint8_t *src_row;
unsigned y_step;
unsigned dst_step;
unsigned src_step;
if (dst_format == src_format) {
/*
* Trivial case.
*/
util_copy_rect(dst, dst_format, dst_stride, dst_x, dst_y,
width, height, src, (int)src_stride,
src_x, src_y);
return;
}
dst_format_desc = util_format_description(dst_format);
src_format_desc = util_format_description(src_format);
assert(dst_x % dst_format_desc->block.width == 0);
assert(dst_y % dst_format_desc->block.height == 0);
assert(src_x % src_format_desc->block.width == 0);
assert(src_y % src_format_desc->block.height == 0);
dst_row = (uint8_t *)dst + dst_y*dst_stride + dst_x*(dst_format_desc->block.bits/8);
src_row = (const uint8_t *)src + src_y*src_stride + src_x*(src_format_desc->block.bits/8);
/*
* This works because all pixel formats have pixel blocks with power of two
* sizes.
*/
y_step = MAX2(dst_format_desc->block.height, src_format_desc->block.height);
assert(y_step % dst_format_desc->block.height == 0);
assert(y_step % src_format_desc->block.height == 0);
dst_step = y_step / dst_format_desc->block.height * dst_stride;
src_step = y_step / src_format_desc->block.height * src_stride;
/*
* TODO: double formats will loose precision
* TODO: Add a special case for formats that are mere swizzles of each other
*/
if (util_format_fits_8unorm(src_format_desc) ||
util_format_fits_8unorm(dst_format_desc)) {
unsigned tmp_stride;
uint8_t *tmp_row;
tmp_stride = width * 4 * sizeof *tmp_row;
tmp_row = MALLOC(y_step * tmp_stride);
if (!tmp_row)
return;
while (height >= y_step) {
src_format_desc->unpack_8unorm(tmp_row, tmp_stride, src_row, src_stride, width, y_step);
dst_format_desc->pack_8unorm(dst_row, dst_stride, tmp_row, tmp_stride, width, y_step);
dst_row += dst_step;
src_row += src_step;
height -= y_step;
}
if (height) {
src_format_desc->unpack_8unorm(tmp_row, tmp_stride, src_row, src_stride, width, height);
dst_format_desc->pack_8unorm(dst_row, dst_stride, tmp_row, tmp_stride, width, height);
}
FREE(tmp_row);
}
else {
unsigned tmp_stride;
float *tmp_row;
tmp_stride = width * 4 * sizeof *tmp_row;
tmp_row = MALLOC(y_step * tmp_stride);
if (!tmp_row)
return;
while (height >= y_step) {
src_format_desc->unpack_float(tmp_row, tmp_stride, src_row, src_stride, width, y_step);
dst_format_desc->pack_float(dst_row, dst_stride, tmp_row, tmp_stride, width, y_step);
dst_row += dst_step;
src_row += src_step;
height -= y_step;
}
if (height) {
src_format_desc->unpack_float(tmp_row, tmp_stride, src_row, src_stride, width, height);
dst_format_desc->pack_float(dst_row, dst_stride, tmp_row, tmp_stride, width, height);
}
FREE(tmp_row);
}
}
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