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/*
* Copyright © 2010 Red Hat, Inc.
*
* 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, sublicense, 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 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
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* 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.
*
* Author: Benjamin Otte <otte@gnome.org>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "pixman-intermediate-private.h"
#include <stdlib.h>
static void
composite_src_x888_y420 (pixman_implementation_t *imp,
pixman_op_t op,
pixman_image_t * src_image,
pixman_image_t * mask_image,
pixman_image_t * dst_image,
int32_t src_x,
int32_t src_y,
int32_t mask_x,
int32_t mask_y,
int32_t dest_x,
int32_t dest_y,
int32_t width,
int32_t height)
{
uint8_t *ydst, *udst, *vdst;
uint32_t *src;
int ydst_stride, udst_stride, vdst_stride, src_stride;
int x, y;
pixman_bool_t last_row, last_column;
last_row = (dest_y + height == dst_image->bits.height) && (height & 1);
last_column = (dest_x + width == dst_image->bits.width) && (width & 1);
/* don't treat odd offsets or sizes */
if ((dest_x & 1) ||
(dest_y & 1) ||
(!last_column && (width & 1)) ||
(!last_row && (height & 1)))
return;
/* Y plane */
PIXMAN_IMAGE_GET_PLANE (src_image, 0, src_x, src_y, uint32_t, src_stride, src, 1);
PIXMAN_IMAGE_GET_PLANE (dst_image, 0, dest_x, dest_y, uint8_t, ydst_stride, ydst, 1);
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
ydst[x] = src[x] >> 16;
}
ydst += ydst_stride;
src += src_stride;
}
/* U and V plane */
PIXMAN_IMAGE_GET_PLANE (src_image, 0, src_x, src_y, uint32_t, src_stride, src, 1);
PIXMAN_IMAGE_GET_PLANE (dst_image, 1, dest_x / 2, dest_y / 2, uint8_t, udst_stride, udst, 1);
PIXMAN_IMAGE_GET_PLANE (dst_image, 2, dest_x / 2, dest_y / 2, uint8_t, vdst_stride, vdst, 1);
for (y = 1; y < height; y += 2)
{
for (x = 1; x < width; x += 2)
{
udst[x >> 1] = ((src[x - 1] >> 8) + (src[x] >> 8) + (src[x + src_stride - 1] >> 8) + (src[x + src_stride] >> 8)) >> 2;
vdst[x >> 1] = ( src[x - 1] + src[x] + src[x + src_stride - 1] + src[x + src_stride] ) >> 2;
}
if (last_column)
{
udst[width >> 1] = ((src[width - 1] >> 8) + (src[width + src_stride - 1] >> 8)) >> 1;
vdst[width >> 1] = ( src[width - 1] + src[width + src_stride - 1] ) >> 1;
}
udst += udst_stride;
vdst += vdst_stride;
src += 2 * src_stride;
}
if (last_row)
{
for (x = 1; x < width; x += 2)
{
udst[x >> 1] = ((src[x - 1] >> 8) + (src[x] >> 8)) >> 1;
vdst[x >> 1] = ( src[x - 1] + src[x] ) >> 1;
}
if (last_column)
{
udst[x >> 1] = src[x - 1] >> 8;
vdst[x >> 1] = src[x - 1];
}
}
}
pixman_bool_t
_pixman_format_requires_intermediate (pixman_format_code_t format)
{
return format == PIXMAN_y420;
}
pixman_bool_t
_pixman_intermediate_setup (bits_image_t *bits)
{
uint32_t *planes[PIXMAN_MAX_PLANES], *data;
int rowstrides[PIXMAN_MAX_PLANES];
int y;
data = _pixman_format_alloc_bits (PIXMAN_x8r8g8b8,
bits->width, bits->height,
planes, rowstrides);
if (data == NULL)
return FALSE;
bits->intermediate = pixman_image_create_planar (PIXMAN_x8r8g8b8,
bits->color_space,
bits->width, bits->height,
1, planes, rowstrides);
if (bits->intermediate == NULL)
{
free (data);
return FALSE;
}
bits->bits = data;
bits->rowstride = rowstrides[0] / sizeof (uint32_t);
for (y = 0; y < bits->height; y++)
{
bits->fetch_scanline_raw_32 ((pixman_image_t *) bits, 0, y, bits->width, data, NULL, 0);
data += rowstrides[0] / sizeof (uint32_t);
}
return TRUE;
}
void
_pixman_intermediate_finish (bits_image_t *bits)
{
composite_src_x888_y420 (NULL, PIXMAN_OP_SRC,
bits->intermediate, NULL, (pixman_image_t *) bits,
0, 0, 0, 0, 0, 0, bits->width, bits->height);
pixman_image_unref (bits->intermediate);
free (bits->bits);
}
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