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/*

 * Copyright © 2009 Red Hat, Inc.

 * Copyright © 2000 SuSE, Inc.

 * Copyright © 2007 Red Hat, Inc.

 * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.

 *             2005 Lars Knoll & Zack Rusin, Trolltech

 *             2008 Aaron Plattner, NVIDIA Corporation

 *

 * Permission to use, copy, modify, distribute, and sell this software and its

 * documentation for any purpose is hereby granted without fee, provided that

 * the above copyright notice appear in all copies and that both that

 * copyright notice and this permission notice appear in supporting

 * documentation, and that the name of Red Hat not be used in advertising or

 * publicity pertaining to distribution of the software without specific,

 * written prior permission.  Red Hat makes no representations about the

 * suitability of this software for any purpose.  It is provided "as is"

 * without express or implied warranty.

 *

 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS

 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND

 * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY

 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN

 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING

 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS

 * SOFTWARE.

 */

#ifdef HAVE_CONFIG_H

#include 

#endif

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include "pixman-private.h"

static pixman_bool_t

general_src_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)

{

    pixman_image_t *image = iter->image;

    if (image->type == LINEAR)

	_pixman_linear_gradient_iter_init (image, iter);

    else if (image->type == RADIAL)

	_pixman_radial_gradient_iter_init (image, iter);

    else if (image->type == CONICAL)

	_pixman_conical_gradient_iter_init (image, iter);

    else if (image->type == BITS)

	_pixman_bits_image_src_iter_init (image, iter);

    else if (image->type == SOLID)

        _pixman_log_error (FUNC, "Solid image not handled by noop");

    else

	_pixman_log_error (FUNC, "Pixman bug: unknown image type\n");

    return TRUE;

}

static pixman_bool_t

general_dest_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)

{

    if (iter->image->type == BITS)

    {

	_pixman_bits_image_dest_iter_init (iter->image, iter);

	return TRUE;

    }

    else

    {

	_pixman_log_error (FUNC, "Trying to write to a non-writable image");

	return FALSE;

    }

}

typedef struct op_info_t op_info_t;

struct op_info_t

{

    uint8_t src, dst;

};

#define ITER_IGNORE_BOTH						\

    (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB | ITER_LOCALIZED_ALPHA)

static const op_info_t op_flags[PIXMAN_N_OPERATORS] =

{

    /* Src                   Dst                   */

    { ITER_IGNORE_BOTH,      ITER_IGNORE_BOTH      }, /* CLEAR */

    { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_BOTH      }, /* SRC */

    { ITER_IGNORE_BOTH,      ITER_LOCALIZED_ALPHA  }, /* DST */

    { 0,                     ITER_LOCALIZED_ALPHA  }, /* OVER */

    { ITER_LOCALIZED_ALPHA,  0                     }, /* OVER_REVERSE */

    { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_RGB       }, /* IN */

    { ITER_IGNORE_RGB,       ITER_LOCALIZED_ALPHA  }, /* IN_REVERSE */

    { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_RGB       }, /* OUT */

    { ITER_IGNORE_RGB,       ITER_LOCALIZED_ALPHA  }, /* OUT_REVERSE */

    { 0,                     0                     }, /* ATOP */

    { 0,                     0                     }, /* ATOP_REVERSE */

    { 0,                     0                     }, /* XOR */

    { ITER_LOCALIZED_ALPHA,  ITER_LOCALIZED_ALPHA  }, /* ADD */

    { 0,                     0                     }, /* SATURATE */

};

#define SCANLINE_BUFFER_LENGTH 8192

static void

general_composite_rect  (pixman_implementation_t *imp,

                         pixman_composite_info_t *info)

{

    PIXMAN_COMPOSITE_ARGS (info);

    uint64_t stack_scanline_buffer[(SCANLINE_BUFFER_LENGTH * 3 + 7) / 8];

    uint8_t *scanline_buffer = (uint8_t *) stack_scanline_buffer;

    uint8_t *src_buffer, *mask_buffer, *dest_buffer;

    pixman_iter_t src_iter, mask_iter, dest_iter;

    pixman_combine_32_func_t compose;

    pixman_bool_t component_alpha;

    iter_flags_t narrow, src_iter_flags;

    int Bpp;

    int i;

    if ((src_image->common.flags & FAST_PATH_NARROW_FORMAT)		    &&

	(!mask_image || mask_image->common.flags & FAST_PATH_NARROW_FORMAT) &&

	(dest_image->common.flags & FAST_PATH_NARROW_FORMAT))

    {

	narrow = ITER_NARROW;

	Bpp = 4;

    }

    else

    {

	narrow = 0;

	Bpp = 16;

    }

    if (width * Bpp > SCANLINE_BUFFER_LENGTH)

    {

	scanline_buffer = pixman_malloc_abc (width, 3, Bpp);

	if (!scanline_buffer)

	    return;

    }

    src_buffer = scanline_buffer;

    mask_buffer = src_buffer + width * Bpp;

    dest_buffer = mask_buffer + width * Bpp;

    if (!narrow)

    {

	/* To make sure there aren't any NANs in the buffers */

	memset (src_buffer, 0, width * Bpp);

	memset (mask_buffer, 0, width * Bpp);

	memset (dest_buffer, 0, width * Bpp);

    }

    /* src iter */

    src_iter_flags = narrow | op_flags[op].src;

    _pixman_implementation_src_iter_init (imp->toplevel, &src_iter, src_image,

					  src_x, src_y, width, height,

					  src_buffer, src_iter_flags, info->src_flags);

    /* mask iter */

    if ((src_iter_flags & (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB)) ==

	(ITER_IGNORE_ALPHA | ITER_IGNORE_RGB))

    {

	/* If it doesn't matter what the source is, then it doesn't matter

	 * what the mask is

	 */

	mask_image = NULL;

    }

    component_alpha =

        mask_image			      &&

        mask_image->common.type == BITS       &&

        mask_image->common.component_alpha    &&

        PIXMAN_FORMAT_RGB (mask_image->bits.format);

    _pixman_implementation_src_iter_init (

	imp->toplevel, &mask_iter, mask_image, mask_x, mask_y, width, height,

	mask_buffer, narrow | (component_alpha? 0 : ITER_IGNORE_RGB), info->mask_flags);

    /* dest iter */

    _pixman_implementation_dest_iter_init (

	imp->toplevel, &dest_iter, dest_image, dest_x, dest_y, width, height,

	dest_buffer, narrow | op_flags[op].dst, info->dest_flags);

    compose = _pixman_implementation_lookup_combiner (

	imp->toplevel, op, component_alpha, narrow);

    for (i = 0; i < height; ++i)

    {

	uint32_t *s, *m, *d;

	m = mask_iter.get_scanline (&mask_iter, NULL);

	s = src_iter.get_scanline (&src_iter, m);

	d = dest_iter.get_scanline (&dest_iter, NULL);

	compose (imp->toplevel, op, d, s, m, width);

	dest_iter.write_back (&dest_iter);

    }

    if (scanline_buffer != (uint8_t *) stack_scanline_buffer)

	free (scanline_buffer);

}

static const pixman_fast_path_t general_fast_path[] =

{

    { PIXMAN_OP_any, PIXMAN_any, 0, PIXMAN_any,	0, PIXMAN_any, 0, general_composite_rect },

    { PIXMAN_OP_NONE }

};

pixman_implementation_t *

_pixman_implementation_create_general (void)

{

    pixman_implementation_t *imp = _pixman_implementation_create (NULL, general_fast_path);

    _pixman_setup_combiner_functions_32 (imp);

    _pixman_setup_combiner_functions_float (imp);

    imp->src_iter_init = general_src_iter_init;

    imp->dest_iter_init = general_dest_iter_init;

    return imp;

}