/* -*- 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 <pixman-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 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 void

noop_init_solid_narrow (pixman_iter_t *iter,

      const pixman_iter_info_t *info)

{ 

    pixman_image_t *image = iter->image;

    uint32_t *buffer = iter->buffer;

    uint32_t *end = buffer + iter->width;

    uint32_t color;

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

  color = image->solid.color_32;

    else

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

    while (buffer < end)

  *(buffer++) = color;

}

static void

noop_init_solid_wide (pixman_iter_t *iter,

          const pixman_iter_info_t *info)

{

    pixman_image_t *image = iter->image;

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

    argb_t *end = buffer + iter->width;

    argb_t color;

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

  color = image->solid.color_float;

    else

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

    while (buffer < end)

  *(buffer++) = color;

}

static void

noop_init_direct_buffer (pixman_iter_t *iter, const pixman_iter_info_t *info)

{

    pixman_image_t *image = iter->image;

    iter->buffer =

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

}

static void

dest_write_back_direct (pixman_iter_t *iter)

{

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

}

static const pixman_iter_info_t noop_iters[] =

{

    /* Source iters */

    { PIXMAN_any,

      0, ITER_IGNORE_ALPHA | ITER_IGNORE_RGB | ITER_SRC,

      NULL,

      _pixman_iter_get_scanline_noop,

      NULL

    },

    { PIXMAN_solid,

      FAST_PATH_NO_ALPHA_MAP, ITER_NARROW | ITER_SRC,

      noop_init_solid_narrow,

      _pixman_iter_get_scanline_noop,

      NULL,

    },

    { PIXMAN_solid,

      FAST_PATH_NO_ALPHA_MAP, ITER_WIDE | ITER_SRC,

      noop_init_solid_wide,

      _pixman_iter_get_scanline_noop,

      NULL

    },

    { PIXMAN_a8r8g8b8,

      FAST_PATH_STANDARD_FLAGS | FAST_PATH_ID_TRANSFORM |

          FAST_PATH_BITS_IMAGE | FAST_PATH_SAMPLES_COVER_CLIP_NEAREST,

      ITER_NARROW | ITER_SRC,

      noop_init_direct_buffer,

      noop_get_scanline,

      NULL

    },

    /* Dest iters */

    { PIXMAN_a8r8g8b8,

      FAST_PATH_STD_DEST_FLAGS, ITER_NARROW | ITER_DEST,

      noop_init_direct_buffer,

      _pixman_iter_get_scanline_noop,

      dest_write_back_direct

    },

    { PIXMAN_x8r8g8b8,

      FAST_PATH_STD_DEST_FLAGS, ITER_NARROW | ITER_DEST | ITER_LOCALIZED_ALPHA,

      noop_init_direct_buffer,

      _pixman_iter_get_scanline_noop,

      dest_write_back_direct

    },

    { PIXMAN_null },

};

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->iter_info = noop_iters;

    return imp;

}