michael@0: /* -*- Mode: c; c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t; -*- */
michael@0: /*
michael@0:  * Copyright © 2011 Red Hat, Inc.
michael@0:  *
michael@0:  * Permission is hereby granted, free of charge, to any person obtaining a
michael@0:  * copy of this software and associated documentation files (the "Software"),
michael@0:  * to deal in the Software without restriction, including without limitation
michael@0:  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
michael@0:  * and/or sell copies of the Software, and to permit persons to whom the
michael@0:  * Software is furnished to do so, subject to the following conditions:
michael@0:  *
michael@0:  * The above copyright notice and this permission notice (including the next
michael@0:  * paragraph) shall be included in all copies or substantial portions of the
michael@0:  * Software.
michael@0:  *
michael@0:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
michael@0:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
michael@0:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
michael@0:  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
michael@0:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
michael@0:  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
michael@0:  * DEALINGS IN THE SOFTWARE.
michael@0:  */
michael@0: #ifdef HAVE_CONFIG_H
michael@0: #include <config.h>
michael@0: #endif
michael@0: #include <string.h>
michael@0: #include <stdlib.h>
michael@0: #include "pixman-private.h"
michael@0: #include "pixman-combine32.h"
michael@0: #include "pixman-inlines.h"
michael@0: 
michael@0: static void
michael@0: noop_composite (pixman_implementation_t *imp,
michael@0: 		pixman_composite_info_t *info)
michael@0: {
michael@0:     return;
michael@0: }
michael@0: 
michael@0: static void
michael@0: dest_write_back_direct (pixman_iter_t *iter)
michael@0: {
michael@0:     iter->buffer += iter->image->bits.rowstride;
michael@0: }
michael@0: 
michael@0: static uint32_t *
michael@0: noop_get_scanline (pixman_iter_t *iter, const uint32_t *mask)
michael@0: {
michael@0:     uint32_t *result = iter->buffer;
michael@0: 
michael@0:     iter->buffer += iter->image->bits.rowstride;
michael@0: 
michael@0:     return result;
michael@0: }
michael@0: 
michael@0: static uint32_t *
michael@0: get_scanline_null (pixman_iter_t *iter, const uint32_t *mask)
michael@0: {
michael@0:     return NULL;
michael@0: }
michael@0: 
michael@0: static pixman_bool_t
michael@0: noop_src_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)
michael@0: {
michael@0:     pixman_image_t *image = iter->image;
michael@0: 
michael@0: #define FLAGS						\
michael@0:     (FAST_PATH_STANDARD_FLAGS | FAST_PATH_ID_TRANSFORM)
michael@0: 
michael@0:     if (!image)
michael@0:     {
michael@0: 	iter->get_scanline = get_scanline_null;
michael@0:     }
michael@0:     else if ((iter->iter_flags & (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB)) ==
michael@0: 	     (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB))
michael@0:     {
michael@0: 	iter->get_scanline = _pixman_iter_get_scanline_noop;
michael@0:     }
michael@0:     else if (image->common.extended_format_code == PIXMAN_solid		&&
michael@0: 	     (iter->image->type == SOLID ||
michael@0: 	      (iter->image_flags & FAST_PATH_NO_ALPHA_MAP)))
michael@0:     {
michael@0: 	if (iter->iter_flags & ITER_NARROW)
michael@0: 	{
michael@0: 	    uint32_t *buffer = iter->buffer;
michael@0: 	    uint32_t *end = buffer + iter->width;
michael@0: 	    uint32_t color;
michael@0: 
michael@0: 	    if (image->type == SOLID)
michael@0: 		color = image->solid.color_32;
michael@0: 	    else
michael@0: 		color = image->bits.fetch_pixel_32 (&image->bits, 0, 0);
michael@0: 
michael@0: 	    while (buffer < end)
michael@0: 		*(buffer++) = color;
michael@0: 	}
michael@0: 	else
michael@0: 	{
michael@0: 	    argb_t *buffer = (argb_t *)iter->buffer;
michael@0: 	    argb_t *end = buffer + iter->width;
michael@0: 	    argb_t color;
michael@0: 
michael@0: 	    if (image->type == SOLID)
michael@0: 		color = image->solid.color_float;
michael@0: 	    else
michael@0: 		color = image->bits.fetch_pixel_float (&image->bits, 0, 0);
michael@0: 
michael@0: 	    while (buffer < end)
michael@0: 		*(buffer++) = color;
michael@0: 	}
michael@0: 
michael@0: 	iter->get_scanline = _pixman_iter_get_scanline_noop;
michael@0:     }
michael@0:     else if (image->common.extended_format_code == PIXMAN_a8r8g8b8	&&
michael@0: 	     (iter->iter_flags & ITER_NARROW)				&&
michael@0: 	     (iter->image_flags & FLAGS) == FLAGS			&&
michael@0: 	     iter->x >= 0 && iter->y >= 0				&&
michael@0: 	     iter->x + iter->width <= image->bits.width			&&
michael@0: 	     iter->y + iter->height <= image->bits.height)
michael@0:     {
michael@0: 	iter->buffer =
michael@0: 	    image->bits.bits + iter->y * image->bits.rowstride + iter->x;
michael@0: 
michael@0: 	iter->get_scanline = noop_get_scanline;
michael@0:     }
michael@0:     else
michael@0:     {
michael@0: 	return FALSE;
michael@0:     }
michael@0: 
michael@0:     return TRUE;
michael@0: }
michael@0: 
michael@0: static pixman_bool_t
michael@0: noop_dest_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)
michael@0: {
michael@0:     pixman_image_t *image = iter->image;
michael@0:     uint32_t image_flags = iter->image_flags;
michael@0:     uint32_t iter_flags = iter->iter_flags;
michael@0:     
michael@0:     if ((image_flags & FAST_PATH_STD_DEST_FLAGS) == FAST_PATH_STD_DEST_FLAGS	&&
michael@0: 	(iter_flags & ITER_NARROW) == ITER_NARROW				&&
michael@0: 	((image->common.extended_format_code == PIXMAN_a8r8g8b8)	||
michael@0: 	 (image->common.extended_format_code == PIXMAN_x8r8g8b8 &&
michael@0: 	  (iter_flags & (ITER_LOCALIZED_ALPHA)))))
michael@0:     {
michael@0: 	iter->buffer = image->bits.bits + iter->y * image->bits.rowstride + iter->x;
michael@0: 
michael@0: 	iter->get_scanline = _pixman_iter_get_scanline_noop;
michael@0: 	iter->write_back = dest_write_back_direct;
michael@0: 
michael@0: 	return TRUE;
michael@0:     }
michael@0:     else
michael@0:     {
michael@0: 	return FALSE;
michael@0:     }
michael@0: }
michael@0: 
michael@0: static const pixman_fast_path_t noop_fast_paths[] =
michael@0: {
michael@0:     { PIXMAN_OP_DST, PIXMAN_any, 0, PIXMAN_any, 0, PIXMAN_any, 0, noop_composite },
michael@0:     { PIXMAN_OP_NONE },
michael@0: };
michael@0: 
michael@0: pixman_implementation_t *
michael@0: _pixman_implementation_create_noop (pixman_implementation_t *fallback)
michael@0: {
michael@0:     pixman_implementation_t *imp =
michael@0: 	_pixman_implementation_create (fallback, noop_fast_paths);
michael@0:  
michael@0:     imp->src_iter_init = noop_src_iter_init;
michael@0:     imp->dest_iter_init = noop_dest_iter_init;
michael@0: 
michael@0:     return imp;
michael@0: }