michael@0: /*
michael@0:  * Copyright © 2009 Red Hat, Inc.
michael@0:  * Copyright © 2000 SuSE, Inc.
michael@0:  * Copyright © 2007 Red Hat, Inc.
michael@0:  * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
michael@0:  *             2005 Lars Knoll & Zack Rusin, Trolltech
michael@0:  *             2008 Aaron Plattner, NVIDIA Corporation
michael@0:  *
michael@0:  * Permission to use, copy, modify, distribute, and sell this software and its
michael@0:  * documentation for any purpose is hereby granted without fee, provided that
michael@0:  * the above copyright notice appear in all copies and that both that
michael@0:  * copyright notice and this permission notice appear in supporting
michael@0:  * documentation, and that the name of Red Hat not be used in advertising or
michael@0:  * publicity pertaining to distribution of the software without specific,
michael@0:  * written prior permission.  Red Hat makes no representations about the
michael@0:  * suitability of this software for any purpose.  It is provided "as is"
michael@0:  * without express or implied warranty.
michael@0:  *
michael@0:  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
michael@0:  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
michael@0:  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
michael@0:  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
michael@0:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
michael@0:  * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
michael@0:  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
michael@0:  * SOFTWARE.
michael@0:  */
michael@0: #ifdef HAVE_CONFIG_H
michael@0: #include <config.h>
michael@0: #endif
michael@0: #include <stdlib.h>
michael@0: #include <string.h>
michael@0: #include <math.h>
michael@0: #include <limits.h>
michael@0: #include <stdio.h>
michael@0: #include <stdlib.h>
michael@0: #include <string.h>
michael@0: #include "pixman-private.h"
michael@0: 
michael@0: static pixman_bool_t
michael@0: general_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:     if (image->type == LINEAR)
michael@0: 	_pixman_linear_gradient_iter_init (image, iter);
michael@0:     else if (image->type == RADIAL)
michael@0: 	_pixman_radial_gradient_iter_init (image, iter);
michael@0:     else if (image->type == CONICAL)
michael@0: 	_pixman_conical_gradient_iter_init (image, iter);
michael@0:     else if (image->type == BITS)
michael@0: 	_pixman_bits_image_src_iter_init (image, iter);
michael@0:     else if (image->type == SOLID)
michael@0:         _pixman_log_error (FUNC, "Solid image not handled by noop");
michael@0:     else         
michael@0: 	_pixman_log_error (FUNC, "Pixman bug: unknown image type\n");
michael@0: 
michael@0:     return TRUE;
michael@0: }
michael@0: 
michael@0: static pixman_bool_t
michael@0: general_dest_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter)
michael@0: {
michael@0:     if (iter->image->type == BITS)
michael@0:     {
michael@0: 	_pixman_bits_image_dest_iter_init (iter->image, iter);
michael@0: 
michael@0: 	return TRUE;
michael@0:     }
michael@0:     else
michael@0:     {
michael@0: 	_pixman_log_error (FUNC, "Trying to write to a non-writable image");
michael@0: 
michael@0: 	return FALSE;
michael@0:     }
michael@0: }
michael@0: 
michael@0: typedef struct op_info_t op_info_t;
michael@0: struct op_info_t
michael@0: {
michael@0:     uint8_t src, dst;
michael@0: };
michael@0: 
michael@0: #define ITER_IGNORE_BOTH						\
michael@0:     (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB | ITER_LOCALIZED_ALPHA)
michael@0: 
michael@0: static const op_info_t op_flags[PIXMAN_N_OPERATORS] =
michael@0: {
michael@0:     /* Src                   Dst                   */
michael@0:     { ITER_IGNORE_BOTH,      ITER_IGNORE_BOTH      }, /* CLEAR */
michael@0:     { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_BOTH      }, /* SRC */
michael@0:     { ITER_IGNORE_BOTH,      ITER_LOCALIZED_ALPHA  }, /* DST */
michael@0:     { 0,                     ITER_LOCALIZED_ALPHA  }, /* OVER */
michael@0:     { ITER_LOCALIZED_ALPHA,  0                     }, /* OVER_REVERSE */
michael@0:     { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_RGB       }, /* IN */
michael@0:     { ITER_IGNORE_RGB,       ITER_LOCALIZED_ALPHA  }, /* IN_REVERSE */
michael@0:     { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_RGB       }, /* OUT */
michael@0:     { ITER_IGNORE_RGB,       ITER_LOCALIZED_ALPHA  }, /* OUT_REVERSE */
michael@0:     { 0,                     0                     }, /* ATOP */
michael@0:     { 0,                     0                     }, /* ATOP_REVERSE */
michael@0:     { 0,                     0                     }, /* XOR */
michael@0:     { ITER_LOCALIZED_ALPHA,  ITER_LOCALIZED_ALPHA  }, /* ADD */
michael@0:     { 0,                     0                     }, /* SATURATE */
michael@0: };
michael@0: 
michael@0: #define SCANLINE_BUFFER_LENGTH 8192
michael@0: 
michael@0: static void
michael@0: general_composite_rect  (pixman_implementation_t *imp,
michael@0:                          pixman_composite_info_t *info)
michael@0: {
michael@0:     PIXMAN_COMPOSITE_ARGS (info);
michael@0:     uint64_t stack_scanline_buffer[(SCANLINE_BUFFER_LENGTH * 3 + 7) / 8];
michael@0:     uint8_t *scanline_buffer = (uint8_t *) stack_scanline_buffer;
michael@0:     uint8_t *src_buffer, *mask_buffer, *dest_buffer;
michael@0:     pixman_iter_t src_iter, mask_iter, dest_iter;
michael@0:     pixman_combine_32_func_t compose;
michael@0:     pixman_bool_t component_alpha;
michael@0:     iter_flags_t narrow, src_iter_flags;
michael@0:     iter_flags_t rgb16;
michael@0:     int Bpp;
michael@0:     int i;
michael@0: 
michael@0:     if ((src_image->common.flags & FAST_PATH_NARROW_FORMAT)		    &&
michael@0: 	(!mask_image || mask_image->common.flags & FAST_PATH_NARROW_FORMAT) &&
michael@0: 	(dest_image->common.flags & FAST_PATH_NARROW_FORMAT))
michael@0:     {
michael@0: 	narrow = ITER_NARROW;
michael@0: 	Bpp = 4;
michael@0:     }
michael@0:     else
michael@0:     {
michael@0: 	narrow = 0;
michael@0: 	Bpp = 16;
michael@0:     }
michael@0: 
michael@0:     // XXX: This special casing is bad. Ideally, we'd keep the general code general perhaps
michael@0:     // by having it deal more specifically with different intermediate formats
michael@0:     if (
michael@0: 	(dest_image->common.flags & FAST_PATH_16_FORMAT && (src_image->type == LINEAR || src_image->type == RADIAL)) &&
michael@0: 	( op == PIXMAN_OP_SRC ||
michael@0:          (op == PIXMAN_OP_OVER && (src_image->common.flags & FAST_PATH_IS_OPAQUE))
michael@0: 	)
michael@0: 	) {
michael@0: 	rgb16 = ITER_16;
michael@0:     } else {
michael@0: 	rgb16 = 0;
michael@0:     }
michael@0: 
michael@0: 
michael@0:     if (width * Bpp > SCANLINE_BUFFER_LENGTH)
michael@0:     {
michael@0: 	scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
michael@0: 
michael@0: 	if (!scanline_buffer)
michael@0: 	    return;
michael@0:     }
michael@0: 
michael@0:     src_buffer = scanline_buffer;
michael@0:     mask_buffer = src_buffer + width * Bpp;
michael@0:     dest_buffer = mask_buffer + width * Bpp;
michael@0: 
michael@0:     if (!narrow)
michael@0:     {
michael@0: 	/* To make sure there aren't any NANs in the buffers */
michael@0: 	memset (src_buffer, 0, width * Bpp);
michael@0: 	memset (mask_buffer, 0, width * Bpp);
michael@0: 	memset (dest_buffer, 0, width * Bpp);
michael@0:     }
michael@0:     
michael@0:     /* src iter */
michael@0:     src_iter_flags = narrow | op_flags[op].src | rgb16;
michael@0: 
michael@0:     _pixman_implementation_src_iter_init (imp->toplevel, &src_iter, src_image,
michael@0: 					  src_x, src_y, width, height,
michael@0: 					  src_buffer, src_iter_flags, info->src_flags);
michael@0: 
michael@0:     /* mask iter */
michael@0:     if ((src_iter_flags & (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB)) ==
michael@0: 	(ITER_IGNORE_ALPHA | ITER_IGNORE_RGB))
michael@0:     {
michael@0: 	/* If it doesn't matter what the source is, then it doesn't matter
michael@0: 	 * what the mask is
michael@0: 	 */
michael@0: 	mask_image = NULL;
michael@0:     }
michael@0: 
michael@0:     component_alpha =
michael@0:         mask_image			      &&
michael@0:         mask_image->common.type == BITS       &&
michael@0:         mask_image->common.component_alpha    &&
michael@0:         PIXMAN_FORMAT_RGB (mask_image->bits.format);
michael@0: 
michael@0:     _pixman_implementation_src_iter_init (
michael@0: 	imp->toplevel, &mask_iter, mask_image, mask_x, mask_y, width, height,
michael@0: 	mask_buffer, narrow | (component_alpha? 0 : ITER_IGNORE_RGB), info->mask_flags);
michael@0: 
michael@0:     /* dest iter */
michael@0:     _pixman_implementation_dest_iter_init (
michael@0: 	imp->toplevel, &dest_iter, dest_image, dest_x, dest_y, width, height,
michael@0: 	dest_buffer, narrow | op_flags[op].dst | rgb16, info->dest_flags);
michael@0: 
michael@0:     compose = _pixman_implementation_lookup_combiner (
michael@0: 	imp->toplevel, op, component_alpha, narrow, !!rgb16);
michael@0: 
michael@0:     for (i = 0; i < height; ++i)
michael@0:     {
michael@0: 	uint32_t *s, *m, *d;
michael@0: 
michael@0: 	m = mask_iter.get_scanline (&mask_iter, NULL);
michael@0: 	s = src_iter.get_scanline (&src_iter, m);
michael@0: 	d = dest_iter.get_scanline (&dest_iter, NULL);
michael@0: 
michael@0: 	compose (imp->toplevel, op, d, s, m, width);
michael@0: 
michael@0: 	dest_iter.write_back (&dest_iter);
michael@0:     }
michael@0: 
michael@0:     if (scanline_buffer != (uint8_t *) stack_scanline_buffer)
michael@0: 	free (scanline_buffer);
michael@0: }
michael@0: 
michael@0: static const pixman_fast_path_t general_fast_path[] =
michael@0: {
michael@0:     { PIXMAN_OP_any, PIXMAN_any, 0, PIXMAN_any,	0, PIXMAN_any, 0, general_composite_rect },
michael@0:     { PIXMAN_OP_NONE }
michael@0: };
michael@0: 
michael@0: pixman_implementation_t *
michael@0: _pixman_implementation_create_general (void)
michael@0: {
michael@0:     pixman_implementation_t *imp = _pixman_implementation_create (NULL, general_fast_path);
michael@0: 
michael@0:     _pixman_setup_combiner_functions_16 (imp);
michael@0:     _pixman_setup_combiner_functions_32 (imp);
michael@0:     _pixman_setup_combiner_functions_float (imp);
michael@0: 
michael@0:     imp->src_iter_init = general_src_iter_init;
michael@0:     imp->dest_iter_init = general_dest_iter_init;
michael@0: 
michael@0:     return imp;
michael@0: }
michael@0: