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 /* -*- Mode: c; c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t; -*- */

 /*

  * Copyright © 2011 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 (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 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.

  */

 #ifdef HAVE_CONFIG_H

 #include <config.h>

 #endif

 #include <string.h>

 #include <stdlib.h>

 #include "pixman-private.h"

 #include "pixman-combine32.h"

 #include "pixman-inlines.h"

 static void

 noop_composite (pixman_implementation_t *imp,

 		pixman_composite_info_t *info)

 {

     return;

 }

 static void

 dest_write_back_direct (pixman_iter_t *iter)

 {

     iter->buffer += iter->image->bits.rowstride;

 }

 static uint32_t *

 noop_get_scanline (pixman_iter_t *iter, const uint32_t *mask)

 {

     uint32_t *result = iter->buffer;

     iter->buffer += iter->image->bits.rowstride;

     return result;

 }

 static uint32_t *

 get_scanline_null (pixman_iter_t *iter, const uint32_t *mask)

 {

     return NULL;

 }

 static pixman_bool_t

 noop_src_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)

 {

     pixman_image_t *image = iter->image;

 #define FLAGS						\

     (FAST_PATH_STANDARD_FLAGS | FAST_PATH_ID_TRANSFORM)

     if (!image)

     {

 	iter->get_scanline = get_scanline_null;

     }

     else if ((iter->iter_flags & (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB)) ==

 	     (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB))

     {

 	iter->get_scanline = _pixman_iter_get_scanline_noop;

     }

     else if (image->common.extended_format_code == PIXMAN_solid		&&

 	     (iter->image->type == SOLID ||

 	      (iter->image_flags & FAST_PATH_NO_ALPHA_MAP)))

     {

 	if (iter->iter_flags & ITER_NARROW)

 	{

 	    uint32_t *buffer = iter->buffer;

 	    uint32_t *end = buffer + iter->width;

 	    uint32_t color;

 	    if (image->type == SOLID)

 		color = image->solid.color_32;

 	    else

 		color = image->bits.fetch_pixel_32 (&image->bits, 0, 0);

 	    while (buffer < end)

 		*(buffer++) = color;

 	}

 	else

 	{

 	    argb_t *buffer = (argb_t *)iter->buffer;

 	    argb_t *end = buffer + iter->width;

 	    argb_t color;

 	    if (image->type == SOLID)

 		color = image->solid.color_float;

 	    else

 		color = image->bits.fetch_pixel_float (&image->bits, 0, 0);

 	    while (buffer < end)

 		*(buffer++) = color;

 	}

 	iter->get_scanline = _pixman_iter_get_scanline_noop;

     }

     else if (image->common.extended_format_code == PIXMAN_a8r8g8b8	&&

 	     (iter->iter_flags & ITER_NARROW)				&&

 	     (iter->image_flags & FLAGS) == FLAGS			&&

 	     iter->x >= 0 && iter->y >= 0				&&

 	     iter->x + iter->width <= image->bits.width			&&

 	     iter->y + iter->height <= image->bits.height)

     {

 	iter->buffer =

 	    image->bits.bits + iter->y * image->bits.rowstride + iter->x;

 	iter->get_scanline = noop_get_scanline;

     }

     else

     {

 	return FALSE;

     }

     return TRUE;

 }

 static pixman_bool_t

 noop_dest_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)

 {

     pixman_image_t *image = iter->image;

     uint32_t image_flags = iter->image_flags;

     uint32_t iter_flags = iter->iter_flags;

     if ((image_flags & FAST_PATH_STD_DEST_FLAGS) == FAST_PATH_STD_DEST_FLAGS	&&

 	(iter_flags & ITER_NARROW) == ITER_NARROW				&&

 	((image->common.extended_format_code == PIXMAN_a8r8g8b8)	||

 	 (image->common.extended_format_code == PIXMAN_x8r8g8b8 &&

 	  (iter_flags & (ITER_LOCALIZED_ALPHA)))))

     {

 	iter->buffer = image->bits.bits + iter->y * image->bits.rowstride + iter->x;

 	iter->get_scanline = _pixman_iter_get_scanline_noop;

 	iter->write_back = dest_write_back_direct;

 	return TRUE;

     }

     else

     {

 	return FALSE;

     }

 }

 static const pixman_fast_path_t noop_fast_paths[] =

 {

     { PIXMAN_OP_DST, PIXMAN_any, 0, PIXMAN_any, 0, PIXMAN_any, 0, noop_composite },

     { PIXMAN_OP_NONE },

 };

 pixman_implementation_t *

 _pixman_implementation_create_noop (pixman_implementation_t *fallback)

 {

     pixman_implementation_t *imp =

 	_pixman_implementation_create (fallback, noop_fast_paths);

     imp->src_iter_init = noop_src_iter_init;

     imp->dest_iter_init = noop_dest_iter_init;

     return imp;

 }