forked from AuroraMiddleware/gtk
2561 lines
79 KiB
C
2561 lines
79 KiB
C
/*
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* Copyright (C) 2000 Red Hat, Inc
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* mediaLib integration Copyright (c) 2001-2007 Sun Microsystems, Inc.
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* All rights reserved. (Brian Cameron, Dmitriy Demin, James Cheng,
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* Padraig O'Briain)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <math.h>
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#include <glib.h>
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#include "pixops.h"
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#include "pixops-internal.h"
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#define SUBSAMPLE_BITS 4
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#define SUBSAMPLE (1 << SUBSAMPLE_BITS)
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#define SUBSAMPLE_MASK ((1 << SUBSAMPLE_BITS)-1)
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#define SCALE_SHIFT 16
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static void
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_pixops_scale_real (guchar *dest_buf,
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int render_x0,
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int render_y0,
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int render_x1,
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int render_y1,
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int dest_rowstride,
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int dest_channels,
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gboolean dest_has_alpha,
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const guchar *src_buf,
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int src_width,
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int src_height,
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int src_rowstride,
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int src_channels,
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gboolean src_has_alpha,
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double scale_x,
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double scale_y,
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PixopsInterpType interp_type);
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typedef struct _PixopsFilter PixopsFilter;
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typedef struct _PixopsFilterDimension PixopsFilterDimension;
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struct _PixopsFilterDimension
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{
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int n;
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double offset;
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double *weights;
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};
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struct _PixopsFilter
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{
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PixopsFilterDimension x;
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PixopsFilterDimension y;
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double overall_alpha;
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};
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typedef guchar *(*PixopsLineFunc) (int *weights, int n_x, int n_y,
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guchar *dest, int dest_x, guchar *dest_end,
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int dest_channels, int dest_has_alpha,
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guchar **src, int src_channels,
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gboolean src_has_alpha, int x_init,
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int x_step, int src_width, int check_size,
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guint32 color1, guint32 color2);
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typedef void (*PixopsPixelFunc) (guchar *dest, int dest_x, int dest_channels,
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int dest_has_alpha, int src_has_alpha,
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int check_size, guint32 color1,
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guint32 color2,
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guint r, guint g, guint b, guint a);
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#ifdef USE_MEDIALIB
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#include <stdlib.h>
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#include <dlfcn.h>
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#include <mlib_image.h>
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#if defined(HAVE_SYS_SYSTEMINFO_H)
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#include <sys/systeminfo.h>
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#elif defined(HAVE_SYS_SYSINFO_H)
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#include <sys/sysinfo.h>
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#endif
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static void pixops_medialib_composite (guchar *dest_buf,
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int dest_width,
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int dest_height,
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int dest_rowstride,
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int dest_channels,
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int dest_has_alpha,
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const guchar *src_buf,
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int src_width,
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int src_height,
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int src_rowstride,
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int src_channels,
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int src_has_alpha,
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int dest_x,
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int dest_y,
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int dest_region_width,
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int dest_region_height,
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double offset_x,
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double offset_y,
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double scale_x,
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double scale_y,
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PixopsInterpType interp_type,
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int overall_alpha);
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static void pixops_medialib_scale (guchar *dest_buf,
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int dest_width,
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int dest_height,
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int dest_rowstride,
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int dest_channels,
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int dest_has_alpha,
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const guchar *src_buf,
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int src_width,
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int src_height,
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int src_rowstride,
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int src_channels,
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int src_has_alpha,
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int dest_x,
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int dest_y,
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int dest_region_width,
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int dest_region_height,
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double offset_x,
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double offset_y,
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double scale_x,
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double scale_y,
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PixopsInterpType interp_type);
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typedef struct _mlInterp mlInterp;
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struct _mlInterp
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{
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double tx;
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double ty;
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PixopsFilter po_filter;
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void *interp_table;
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};
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static gboolean medialib_initialized = FALSE;
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static gboolean use_medialib = TRUE;
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/*
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* Sun mediaLib(tm) support.
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*
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* http://www.sun.com/processors/vis/mlib.html
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*
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*/
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static void
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_pixops_use_medialib ()
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{
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char *mlib_version_string;
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char sys_info[257];
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long count;
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medialib_initialized = TRUE;
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if (getenv ("GDK_DISABLE_MEDIALIB"))
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{
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use_medialib = FALSE;
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return;
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}
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/*
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* The imaging functions we want to use were added in mediaLib version 2.
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* So turn off mediaLib support if the user has an older version.
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* mlib_version returns a string in this format:
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*
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* mediaLib:0210:20011101:v8plusa
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* ^^^^^^^^ ^^^^ ^^^^^^^^ ^^^^^^^
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* libname vers build ISALIST identifier
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* date (in this case sparcv8plus+vis)
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*
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* The first 2 digits of the version are the major version. The 3rd digit
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* is the minor version, and the 4th digit is the micro version. So the
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* above string corresponds to version 2.1.0. In the following test we only
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* care about the major version.
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*/
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mlib_version_string = mlib_version ();
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count = sysinfo (SI_ARCHITECTURE, &sys_info[0], 257);
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if (count != -1)
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{
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if (strcmp (sys_info, "i386") == 0)
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{
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char *mlib_target_isa = &mlib_version_string[23];
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/*
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* For x86 processors mediaLib generic C implementation
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* does not give any performance advantage so disable it
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*/
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if (strncmp (mlib_target_isa, "sse", 3) != 0)
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{
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use_medialib = FALSE;
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return;
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}
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/*
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* For x86 processors use of libumem conflicts with
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* mediaLib, so avoid using it.
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*/
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if (dlsym (RTLD_PROBE, "umem_alloc") != NULL)
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{
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use_medialib = FALSE;
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return;
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}
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}
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}
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else
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{
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/* Failed to get system architecture, disable mediaLib anyway */
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use_medialib = FALSE;
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return;
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}
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}
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#endif
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static int
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get_check_shift (int check_size)
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{
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int check_shift = 0;
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g_return_val_if_fail (check_size >= 0, 4);
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while (!(check_size & 1))
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{
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check_shift++;
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check_size >>= 1;
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}
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return check_shift;
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}
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static void
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pixops_scale_nearest (guchar *dest_buf,
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int render_x0,
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int render_y0,
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int render_x1,
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int render_y1,
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int dest_rowstride,
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int dest_channels,
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gboolean dest_has_alpha,
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const guchar *src_buf,
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int src_width,
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int src_height,
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int src_rowstride,
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int src_channels,
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gboolean src_has_alpha,
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double scale_x,
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double scale_y)
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{
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int i;
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int x;
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int x_step = (1 << SCALE_SHIFT) / scale_x;
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int y_step = (1 << SCALE_SHIFT) / scale_y;
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int xmax, xstart, xstop, x_pos, y_pos;
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const guchar *p;
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#define INNER_LOOP(SRC_CHANNELS,DEST_CHANNELS,ASSIGN_PIXEL) \
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xmax = x + (render_x1 - render_x0) * x_step; \
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xstart = MIN (0, xmax); \
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xstop = MIN (src_width << SCALE_SHIFT, xmax); \
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p = src + (CLAMP (x, xstart, xstop) >> SCALE_SHIFT) * SRC_CHANNELS; \
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while (x < xstart) \
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{ \
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ASSIGN_PIXEL; \
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dest += DEST_CHANNELS; \
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x += x_step; \
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} \
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while (x < xstop) \
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{ \
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p = src + (x >> SCALE_SHIFT) * SRC_CHANNELS; \
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ASSIGN_PIXEL; \
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dest += DEST_CHANNELS; \
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x += x_step; \
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} \
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x_pos = x >> SCALE_SHIFT; \
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p = src + CLAMP (x_pos, 0, src_width - 1) * SRC_CHANNELS; \
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while (x < xmax) \
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{ \
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ASSIGN_PIXEL; \
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dest += DEST_CHANNELS; \
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x += x_step; \
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}
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for (i = 0; i < (render_y1 - render_y0); i++)
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{
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const guchar *src;
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guchar *dest;
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y_pos = ((i + render_y0) * y_step + y_step / 2) >> SCALE_SHIFT;
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y_pos = CLAMP (y_pos, 0, src_height - 1);
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src = src_buf + y_pos * src_rowstride;
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dest = dest_buf + i * dest_rowstride;
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x = render_x0 * x_step + x_step / 2;
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if (src_channels == 3)
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{
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if (dest_channels == 3)
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{
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INNER_LOOP (3, 3, dest[0]=p[0];dest[1]=p[1];dest[2]=p[2]);
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}
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else
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{
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INNER_LOOP (3, 4, dest[0]=p[0];dest[1]=p[1];dest[2]=p[2];dest[3]=0xff);
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}
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}
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else if (src_channels == 4)
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{
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if (dest_channels == 3)
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{
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INNER_LOOP (4, 3, dest[0]=p[0];dest[1]=p[1];dest[2]=p[2]);
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}
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else
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{
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guint32 *p32;
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INNER_LOOP(4, 4, p32=(guint32*)dest;*p32=*((guint32*)p));
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}
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}
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}
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}
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static void
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pixops_composite_nearest (guchar *dest_buf,
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int render_x0,
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int render_y0,
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int render_x1,
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int render_y1,
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int dest_rowstride,
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int dest_channels,
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gboolean dest_has_alpha,
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const guchar *src_buf,
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int src_width,
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int src_height,
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int src_rowstride,
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int src_channels,
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gboolean src_has_alpha,
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double scale_x,
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double scale_y,
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int overall_alpha)
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{
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int i;
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int x;
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int x_step = (1 << SCALE_SHIFT) / scale_x;
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int y_step = (1 << SCALE_SHIFT) / scale_y;
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int xmax, xstart, xstop, x_pos, y_pos;
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const guchar *p;
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unsigned int a0;
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for (i = 0; i < (render_y1 - render_y0); i++)
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{
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const guchar *src;
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guchar *dest;
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y_pos = ((i + render_y0) * y_step + y_step / 2) >> SCALE_SHIFT;
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y_pos = CLAMP (y_pos, 0, src_height - 1);
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src = src_buf + y_pos * src_rowstride;
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dest = dest_buf + i * dest_rowstride;
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x = render_x0 * x_step + x_step / 2;
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INNER_LOOP(src_channels, dest_channels,
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if (src_has_alpha)
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a0 = (p[3] * overall_alpha) / 0xff;
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else
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a0 = overall_alpha;
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switch (a0)
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{
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case 0:
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break;
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case 255:
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dest[0] = p[0];
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dest[1] = p[1];
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dest[2] = p[2];
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if (dest_has_alpha)
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dest[3] = 0xff;
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break;
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default:
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if (dest_has_alpha)
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{
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unsigned int w0 = 0xff * a0;
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unsigned int w1 = (0xff - a0) * dest[3];
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unsigned int w = w0 + w1;
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dest[0] = (w0 * p[0] + w1 * dest[0]) / w;
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dest[1] = (w0 * p[1] + w1 * dest[1]) / w;
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dest[2] = (w0 * p[2] + w1 * dest[2]) / w;
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dest[3] = w / 0xff;
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}
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else
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{
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unsigned int a1 = 0xff - a0;
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unsigned int tmp;
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tmp = a0 * p[0] + a1 * dest[0] + 0x80;
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dest[0] = (tmp + (tmp >> 8)) >> 8;
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tmp = a0 * p[1] + a1 * dest[1] + 0x80;
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dest[1] = (tmp + (tmp >> 8)) >> 8;
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tmp = a0 * p[2] + a1 * dest[2] + 0x80;
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dest[2] = (tmp + (tmp >> 8)) >> 8;
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}
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break;
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}
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);
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}
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}
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static void
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pixops_composite_color_nearest (guchar *dest_buf,
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int render_x0,
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int render_y0,
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int render_x1,
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int render_y1,
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int dest_rowstride,
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int dest_channels,
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gboolean dest_has_alpha,
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const guchar *src_buf,
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int src_width,
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int src_height,
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int src_rowstride,
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int src_channels,
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gboolean src_has_alpha,
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double scale_x,
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double scale_y,
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int overall_alpha,
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int check_x,
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int check_y,
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int check_size,
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guint32 color1,
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guint32 color2)
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{
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int i, j;
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int x;
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int x_step = (1 << SCALE_SHIFT) / scale_x;
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int y_step = (1 << SCALE_SHIFT) / scale_y;
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int r1, g1, b1, r2, g2, b2;
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int check_shift = get_check_shift (check_size);
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int xmax, xstart, xstop, x_pos, y_pos;
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const guchar *p;
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unsigned int a0;
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for (i = 0; i < (render_y1 - render_y0); i++)
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{
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const guchar *src;
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guchar *dest;
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y_pos = ((i + render_y0) * y_step + y_step / 2) >> SCALE_SHIFT;
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y_pos = CLAMP (y_pos, 0, src_height - 1);
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src = src_buf + y_pos * src_rowstride;
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dest = dest_buf + i * dest_rowstride;
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x = render_x0 * x_step + x_step / 2;
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|
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if (((i + check_y) >> check_shift) & 1)
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{
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r1 = (color2 & 0xff0000) >> 16;
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g1 = (color2 & 0xff00) >> 8;
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b1 = color2 & 0xff;
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r2 = (color1 & 0xff0000) >> 16;
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g2 = (color1 & 0xff00) >> 8;
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b2 = color1 & 0xff;
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}
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else
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{
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r1 = (color1 & 0xff0000) >> 16;
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g1 = (color1 & 0xff00) >> 8;
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b1 = color1 & 0xff;
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r2 = (color2 & 0xff0000) >> 16;
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g2 = (color2 & 0xff00) >> 8;
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b2 = color2 & 0xff;
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}
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j = 0;
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INNER_LOOP(src_channels, dest_channels,
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if (src_has_alpha)
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a0 = (p[3] * overall_alpha + 0xff) >> 8;
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else
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a0 = overall_alpha;
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switch (a0)
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{
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case 0:
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if (((j + check_x) >> check_shift) & 1)
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{
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dest[0] = r2;
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dest[1] = g2;
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dest[2] = b2;
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}
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else
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{
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dest[0] = r1;
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dest[1] = g1;
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dest[2] = b1;
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}
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break;
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case 255:
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dest[0] = p[0];
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dest[1] = p[1];
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dest[2] = p[2];
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break;
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|
default:
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{
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unsigned int tmp;
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if (((j + check_x) >> check_shift) & 1)
|
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{
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tmp = ((int) p[0] - r2) * a0;
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dest[0] = r2 + ((tmp + (tmp >> 8) + 0x80) >> 8);
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tmp = ((int) p[1] - g2) * a0;
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dest[1] = g2 + ((tmp + (tmp >> 8) + 0x80) >> 8);
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tmp = ((int) p[2] - b2) * a0;
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dest[2] = b2 + ((tmp + (tmp >> 8) + 0x80) >> 8);
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}
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else
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{
|
|
tmp = ((int) p[0] - r1) * a0;
|
|
dest[0] = r1 + ((tmp + (tmp >> 8) + 0x80) >> 8);
|
|
tmp = ((int) p[1] - g1) * a0;
|
|
dest[1] = g1 + ((tmp + (tmp >> 8) + 0x80) >> 8);
|
|
tmp = ((int) p[2] - b1) * a0;
|
|
dest[2] = b1 + ((tmp + (tmp >> 8) + 0x80) >> 8);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (dest_channels == 4)
|
|
dest[3] = 0xff;
|
|
|
|
j++;
|
|
);
|
|
}
|
|
}
|
|
#undef INNER_LOOP
|
|
|
|
static void
|
|
composite_pixel (guchar *dest, int dest_x, int dest_channels, int dest_has_alpha,
|
|
int src_has_alpha, int check_size, guint32 color1, guint32 color2,
|
|
guint r, guint g, guint b, guint a)
|
|
{
|
|
if (dest_has_alpha)
|
|
{
|
|
unsigned int w0 = a - (a >> 8);
|
|
unsigned int w1 = ((0xff0000 - a) >> 8) * dest[3];
|
|
unsigned int w = w0 + w1;
|
|
|
|
if (w != 0)
|
|
{
|
|
dest[0] = (r - (r >> 8) + w1 * dest[0]) / w;
|
|
dest[1] = (g - (g >> 8) + w1 * dest[1]) / w;
|
|
dest[2] = (b - (b >> 8) + w1 * dest[2]) / w;
|
|
dest[3] = w / 0xff00;
|
|
}
|
|
else
|
|
{
|
|
dest[0] = 0;
|
|
dest[1] = 0;
|
|
dest[2] = 0;
|
|
dest[3] = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
dest[0] = (r + (0xff0000 - a) * dest[0]) / 0xff0000;
|
|
dest[1] = (g + (0xff0000 - a) * dest[1]) / 0xff0000;
|
|
dest[2] = (b + (0xff0000 - a) * dest[2]) / 0xff0000;
|
|
}
|
|
}
|
|
|
|
static guchar *
|
|
composite_line (int *weights, int n_x, int n_y,
|
|
guchar *dest, int dest_x, guchar *dest_end, int dest_channels, int dest_has_alpha,
|
|
guchar **src, int src_channels, gboolean src_has_alpha,
|
|
int x_init, int x_step, int src_width,
|
|
int check_size, guint32 color1, guint32 color2)
|
|
{
|
|
int x = x_init;
|
|
int i, j;
|
|
|
|
while (dest < dest_end)
|
|
{
|
|
int x_scaled = x >> SCALE_SHIFT;
|
|
unsigned int r = 0, g = 0, b = 0, a = 0;
|
|
int *pixel_weights;
|
|
|
|
pixel_weights = weights + ((x >> (SCALE_SHIFT - SUBSAMPLE_BITS)) & SUBSAMPLE_MASK) * n_x * n_y;
|
|
|
|
for (i=0; i<n_y; i++)
|
|
{
|
|
guchar *q = src[i] + x_scaled * src_channels;
|
|
int *line_weights = pixel_weights + n_x * i;
|
|
|
|
for (j=0; j<n_x; j++)
|
|
{
|
|
unsigned int ta;
|
|
|
|
if (src_has_alpha)
|
|
ta = q[3] * line_weights[j];
|
|
else
|
|
ta = 0xff * line_weights[j];
|
|
|
|
r += ta * q[0];
|
|
g += ta * q[1];
|
|
b += ta * q[2];
|
|
a += ta;
|
|
|
|
q += src_channels;
|
|
}
|
|
}
|
|
|
|
if (dest_has_alpha)
|
|
{
|
|
unsigned int w0 = a - (a >> 8);
|
|
unsigned int w1 = ((0xff0000 - a) >> 8) * dest[3];
|
|
unsigned int w = w0 + w1;
|
|
|
|
if (w != 0)
|
|
{
|
|
dest[0] = (r - (r >> 8) + w1 * dest[0]) / w;
|
|
dest[1] = (g - (g >> 8) + w1 * dest[1]) / w;
|
|
dest[2] = (b - (b >> 8) + w1 * dest[2]) / w;
|
|
dest[3] = w / 0xff00;
|
|
}
|
|
else
|
|
{
|
|
dest[0] = 0;
|
|
dest[1] = 0;
|
|
dest[2] = 0;
|
|
dest[3] = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
dest[0] = (r + (0xff0000 - a) * dest[0]) / 0xff0000;
|
|
dest[1] = (g + (0xff0000 - a) * dest[1]) / 0xff0000;
|
|
dest[2] = (b + (0xff0000 - a) * dest[2]) / 0xff0000;
|
|
}
|
|
|
|
dest += dest_channels;
|
|
x += x_step;
|
|
}
|
|
|
|
return dest;
|
|
}
|
|
|
|
static guchar *
|
|
composite_line_22_4a4 (int *weights, int n_x, int n_y,
|
|
guchar *dest, int dest_x, guchar *dest_end, int dest_channels, int dest_has_alpha,
|
|
guchar **src, int src_channels, gboolean src_has_alpha,
|
|
int x_init, int x_step, int src_width,
|
|
int check_size, guint32 color1, guint32 color2)
|
|
{
|
|
int x = x_init;
|
|
guchar *src0 = src[0];
|
|
guchar *src1 = src[1];
|
|
|
|
g_return_val_if_fail (src_channels != 3, dest);
|
|
g_return_val_if_fail (src_has_alpha, dest);
|
|
|
|
while (dest < dest_end)
|
|
{
|
|
int x_scaled = x >> SCALE_SHIFT;
|
|
unsigned int r, g, b, a, ta;
|
|
int *pixel_weights;
|
|
guchar *q0, *q1;
|
|
int w1, w2, w3, w4;
|
|
|
|
q0 = src0 + x_scaled * 4;
|
|
q1 = src1 + x_scaled * 4;
|
|
|
|
pixel_weights = (int *)((char *)weights +
|
|
((x >> (SCALE_SHIFT - SUBSAMPLE_BITS - 4)) & (SUBSAMPLE_MASK << 4)));
|
|
|
|
w1 = pixel_weights[0];
|
|
w2 = pixel_weights[1];
|
|
w3 = pixel_weights[2];
|
|
w4 = pixel_weights[3];
|
|
|
|
a = w1 * q0[3];
|
|
r = a * q0[0];
|
|
g = a * q0[1];
|
|
b = a * q0[2];
|
|
|
|
ta = w2 * q0[7];
|
|
r += ta * q0[4];
|
|
g += ta * q0[5];
|
|
b += ta * q0[6];
|
|
a += ta;
|
|
|
|
ta = w3 * q1[3];
|
|
r += ta * q1[0];
|
|
g += ta * q1[1];
|
|
b += ta * q1[2];
|
|
a += ta;
|
|
|
|
ta = w4 * q1[7];
|
|
r += ta * q1[4];
|
|
g += ta * q1[5];
|
|
b += ta * q1[6];
|
|
a += ta;
|
|
|
|
dest[0] = ((0xff0000 - a) * dest[0] + r) >> 24;
|
|
dest[1] = ((0xff0000 - a) * dest[1] + g) >> 24;
|
|
dest[2] = ((0xff0000 - a) * dest[2] + b) >> 24;
|
|
dest[3] = a >> 16;
|
|
|
|
dest += 4;
|
|
x += x_step;
|
|
}
|
|
|
|
return dest;
|
|
}
|
|
|
|
#ifdef USE_MMX
|
|
static guchar *
|
|
composite_line_22_4a4_mmx_stub (int *weights, int n_x, int n_y, guchar *dest,
|
|
int dest_x, guchar *dest_end,
|
|
int dest_channels, int dest_has_alpha,
|
|
guchar **src, int src_channels,
|
|
gboolean src_has_alpha, int x_init,
|
|
int x_step, int src_width, int check_size,
|
|
guint32 color1, guint32 color2)
|
|
{
|
|
guint32 mmx_weights[16][8];
|
|
int j;
|
|
|
|
for (j=0; j<16; j++)
|
|
{
|
|
mmx_weights[j][0] = 0x00010001 * (weights[4*j] >> 8);
|
|
mmx_weights[j][1] = 0x00010001 * (weights[4*j] >> 8);
|
|
mmx_weights[j][2] = 0x00010001 * (weights[4*j + 1] >> 8);
|
|
mmx_weights[j][3] = 0x00010001 * (weights[4*j + 1] >> 8);
|
|
mmx_weights[j][4] = 0x00010001 * (weights[4*j + 2] >> 8);
|
|
mmx_weights[j][5] = 0x00010001 * (weights[4*j + 2] >> 8);
|
|
mmx_weights[j][6] = 0x00010001 * (weights[4*j + 3] >> 8);
|
|
mmx_weights[j][7] = 0x00010001 * (weights[4*j + 3] >> 8);
|
|
}
|
|
|
|
return _pixops_composite_line_22_4a4_mmx (mmx_weights, dest, src[0], src[1],
|
|
x_step, dest_end, x_init);
|
|
}
|
|
#endif /* USE_MMX */
|
|
|
|
static void
|
|
composite_pixel_color (guchar *dest, int dest_x, int dest_channels,
|
|
int dest_has_alpha, int src_has_alpha, int check_size,
|
|
guint32 color1, guint32 color2, guint r, guint g,
|
|
guint b, guint a)
|
|
{
|
|
int dest_r, dest_g, dest_b;
|
|
int check_shift = get_check_shift (check_size);
|
|
|
|
if ((dest_x >> check_shift) & 1)
|
|
{
|
|
dest_r = (color2 & 0xff0000) >> 16;
|
|
dest_g = (color2 & 0xff00) >> 8;
|
|
dest_b = color2 & 0xff;
|
|
}
|
|
else
|
|
{
|
|
dest_r = (color1 & 0xff0000) >> 16;
|
|
dest_g = (color1 & 0xff00) >> 8;
|
|
dest_b = color1 & 0xff;
|
|
}
|
|
|
|
dest[0] = ((0xff0000 - a) * dest_r + r) >> 24;
|
|
dest[1] = ((0xff0000 - a) * dest_g + g) >> 24;
|
|
dest[2] = ((0xff0000 - a) * dest_b + b) >> 24;
|
|
|
|
if (dest_has_alpha)
|
|
dest[3] = 0xff;
|
|
else if (dest_channels == 4)
|
|
dest[3] = a >> 16;
|
|
}
|
|
|
|
static guchar *
|
|
composite_line_color (int *weights, int n_x, int n_y, guchar *dest,
|
|
int dest_x, guchar *dest_end, int dest_channels,
|
|
int dest_has_alpha, guchar **src, int src_channels,
|
|
gboolean src_has_alpha, int x_init, int x_step,
|
|
int src_width, int check_size, guint32 color1,
|
|
guint32 color2)
|
|
{
|
|
int x = x_init;
|
|
int i, j;
|
|
int check_shift = get_check_shift (check_size);
|
|
int dest_r1, dest_g1, dest_b1;
|
|
int dest_r2, dest_g2, dest_b2;
|
|
|
|
g_return_val_if_fail (check_size != 0, dest);
|
|
|
|
dest_r1 = (color1 & 0xff0000) >> 16;
|
|
dest_g1 = (color1 & 0xff00) >> 8;
|
|
dest_b1 = color1 & 0xff;
|
|
|
|
dest_r2 = (color2 & 0xff0000) >> 16;
|
|
dest_g2 = (color2 & 0xff00) >> 8;
|
|
dest_b2 = color2 & 0xff;
|
|
|
|
while (dest < dest_end)
|
|
{
|
|
int x_scaled = x >> SCALE_SHIFT;
|
|
unsigned int r = 0, g = 0, b = 0, a = 0;
|
|
int *pixel_weights;
|
|
|
|
pixel_weights = weights + ((x >> (SCALE_SHIFT - SUBSAMPLE_BITS)) & SUBSAMPLE_MASK) * n_x * n_y;
|
|
|
|
for (i=0; i<n_y; i++)
|
|
{
|
|
guchar *q = src[i] + x_scaled * src_channels;
|
|
int *line_weights = pixel_weights + n_x * i;
|
|
|
|
for (j=0; j<n_x; j++)
|
|
{
|
|
unsigned int ta;
|
|
|
|
if (src_has_alpha)
|
|
ta = q[3] * line_weights[j];
|
|
else
|
|
ta = 0xff * line_weights[j];
|
|
|
|
r += ta * q[0];
|
|
g += ta * q[1];
|
|
b += ta * q[2];
|
|
a += ta;
|
|
|
|
q += src_channels;
|
|
}
|
|
}
|
|
|
|
if ((dest_x >> check_shift) & 1)
|
|
{
|
|
dest[0] = ((0xff0000 - a) * dest_r2 + r) >> 24;
|
|
dest[1] = ((0xff0000 - a) * dest_g2 + g) >> 24;
|
|
dest[2] = ((0xff0000 - a) * dest_b2 + b) >> 24;
|
|
}
|
|
else
|
|
{
|
|
dest[0] = ((0xff0000 - a) * dest_r1 + r) >> 24;
|
|
dest[1] = ((0xff0000 - a) * dest_g1 + g) >> 24;
|
|
dest[2] = ((0xff0000 - a) * dest_b1 + b) >> 24;
|
|
}
|
|
|
|
if (dest_has_alpha)
|
|
dest[3] = 0xff;
|
|
else if (dest_channels == 4)
|
|
dest[3] = a >> 16;
|
|
|
|
dest += dest_channels;
|
|
x += x_step;
|
|
dest_x++;
|
|
}
|
|
|
|
return dest;
|
|
}
|
|
|
|
#ifdef USE_MMX
|
|
static guchar *
|
|
composite_line_color_22_4a4_mmx_stub (int *weights, int n_x, int n_y,
|
|
guchar *dest, int dest_x,
|
|
guchar *dest_end, int dest_channels,
|
|
int dest_has_alpha, guchar **src,
|
|
int src_channels, gboolean src_has_alpha,
|
|
int x_init, int x_step, int src_width,
|
|
int check_size, guint32 color1,
|
|
guint32 color2)
|
|
{
|
|
guint32 mmx_weights[16][8];
|
|
int check_shift = get_check_shift (check_size);
|
|
int colors[4];
|
|
int j;
|
|
|
|
for (j=0; j<16; j++)
|
|
{
|
|
mmx_weights[j][0] = 0x00010001 * (weights[4*j] >> 8);
|
|
mmx_weights[j][1] = 0x00010001 * (weights[4*j] >> 8);
|
|
mmx_weights[j][2] = 0x00010001 * (weights[4*j + 1] >> 8);
|
|
mmx_weights[j][3] = 0x00010001 * (weights[4*j + 1] >> 8);
|
|
mmx_weights[j][4] = 0x00010001 * (weights[4*j + 2] >> 8);
|
|
mmx_weights[j][5] = 0x00010001 * (weights[4*j + 2] >> 8);
|
|
mmx_weights[j][6] = 0x00010001 * (weights[4*j + 3] >> 8);
|
|
mmx_weights[j][7] = 0x00010001 * (weights[4*j + 3] >> 8);
|
|
}
|
|
|
|
colors[0] = (color1 & 0xff00) << 8 | (color1 & 0xff);
|
|
colors[1] = (color1 & 0xff0000) >> 16;
|
|
colors[2] = (color2 & 0xff00) << 8 | (color2 & 0xff);
|
|
colors[3] = (color2 & 0xff0000) >> 16;
|
|
|
|
return _pixops_composite_line_color_22_4a4_mmx (mmx_weights, dest, src[0],
|
|
src[1], x_step, dest_end, x_init, dest_x, check_shift, colors);
|
|
}
|
|
#endif /* USE_MMX */
|
|
|
|
static void
|
|
scale_pixel (guchar *dest, int dest_x, int dest_channels, int dest_has_alpha,
|
|
int src_has_alpha, int check_size, guint32 color1, guint32 color2,
|
|
guint r, guint g, guint b, guint a)
|
|
{
|
|
if (src_has_alpha)
|
|
{
|
|
if (a)
|
|
{
|
|
dest[0] = r / a;
|
|
dest[1] = g / a;
|
|
dest[2] = b / a;
|
|
dest[3] = a >> 16;
|
|
}
|
|
else
|
|
{
|
|
dest[0] = 0;
|
|
dest[1] = 0;
|
|
dest[2] = 0;
|
|
dest[3] = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
dest[0] = (r + 0xffffff) >> 24;
|
|
dest[1] = (g + 0xffffff) >> 24;
|
|
dest[2] = (b + 0xffffff) >> 24;
|
|
|
|
if (dest_has_alpha)
|
|
dest[3] = 0xff;
|
|
}
|
|
}
|
|
|
|
static guchar *
|
|
scale_line (int *weights, int n_x, int n_y, guchar *dest, int dest_x,
|
|
guchar *dest_end, int dest_channels, int dest_has_alpha,
|
|
guchar **src, int src_channels, gboolean src_has_alpha, int x_init,
|
|
int x_step, int src_width, int check_size, guint32 color1,
|
|
guint32 color2)
|
|
{
|
|
int x = x_init;
|
|
int i, j;
|
|
|
|
while (dest < dest_end)
|
|
{
|
|
int x_scaled = x >> SCALE_SHIFT;
|
|
int *pixel_weights;
|
|
|
|
pixel_weights = weights +
|
|
((x >> (SCALE_SHIFT - SUBSAMPLE_BITS)) & SUBSAMPLE_MASK) * n_x * n_y;
|
|
|
|
if (src_has_alpha)
|
|
{
|
|
unsigned int r = 0, g = 0, b = 0, a = 0;
|
|
for (i=0; i<n_y; i++)
|
|
{
|
|
guchar *q = src[i] + x_scaled * src_channels;
|
|
int *line_weights = pixel_weights + n_x * i;
|
|
|
|
for (j=0; j<n_x; j++)
|
|
{
|
|
unsigned int ta;
|
|
|
|
ta = q[3] * line_weights[j];
|
|
r += ta * q[0];
|
|
g += ta * q[1];
|
|
b += ta * q[2];
|
|
a += ta;
|
|
|
|
q += src_channels;
|
|
}
|
|
}
|
|
|
|
if (a)
|
|
{
|
|
dest[0] = r / a;
|
|
dest[1] = g / a;
|
|
dest[2] = b / a;
|
|
dest[3] = a >> 16;
|
|
}
|
|
else
|
|
{
|
|
dest[0] = 0;
|
|
dest[1] = 0;
|
|
dest[2] = 0;
|
|
dest[3] = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
unsigned int r = 0, g = 0, b = 0;
|
|
for (i=0; i<n_y; i++)
|
|
{
|
|
guchar *q = src[i] + x_scaled * src_channels;
|
|
int *line_weights = pixel_weights + n_x * i;
|
|
|
|
for (j=0; j<n_x; j++)
|
|
{
|
|
unsigned int ta = line_weights[j];
|
|
|
|
r += ta * q[0];
|
|
g += ta * q[1];
|
|
b += ta * q[2];
|
|
|
|
q += src_channels;
|
|
}
|
|
}
|
|
|
|
dest[0] = (r + 0xffff) >> 16;
|
|
dest[1] = (g + 0xffff) >> 16;
|
|
dest[2] = (b + 0xffff) >> 16;
|
|
|
|
if (dest_has_alpha)
|
|
dest[3] = 0xff;
|
|
}
|
|
|
|
dest += dest_channels;
|
|
|
|
x += x_step;
|
|
}
|
|
|
|
return dest;
|
|
}
|
|
|
|
#ifdef USE_MMX
|
|
static guchar *
|
|
scale_line_22_33_mmx_stub (int *weights, int n_x, int n_y, guchar *dest,
|
|
int dest_x, guchar *dest_end, int dest_channels,
|
|
int dest_has_alpha, guchar **src, int src_channels,
|
|
gboolean src_has_alpha, int x_init, int x_step,
|
|
int src_width, int check_size, guint32 color1,
|
|
guint32 color2)
|
|
{
|
|
guint32 mmx_weights[16][8];
|
|
int j;
|
|
|
|
for (j=0; j<16; j++)
|
|
{
|
|
mmx_weights[j][0] = 0x00010001 * (weights[4*j] >> 8);
|
|
mmx_weights[j][1] = 0x00010001 * (weights[4*j] >> 8);
|
|
mmx_weights[j][2] = 0x00010001 * (weights[4*j + 1] >> 8);
|
|
mmx_weights[j][3] = 0x00010001 * (weights[4*j + 1] >> 8);
|
|
mmx_weights[j][4] = 0x00010001 * (weights[4*j + 2] >> 8);
|
|
mmx_weights[j][5] = 0x00010001 * (weights[4*j + 2] >> 8);
|
|
mmx_weights[j][6] = 0x00010001 * (weights[4*j + 3] >> 8);
|
|
mmx_weights[j][7] = 0x00010001 * (weights[4*j + 3] >> 8);
|
|
}
|
|
|
|
return _pixops_scale_line_22_33_mmx (mmx_weights, dest, src[0], src[1],
|
|
x_step, dest_end, x_init);
|
|
}
|
|
#endif /* USE_MMX */
|
|
|
|
static guchar *
|
|
scale_line_22_33 (int *weights, int n_x, int n_y, guchar *dest, int dest_x,
|
|
guchar *dest_end, int dest_channels, int dest_has_alpha,
|
|
guchar **src, int src_channels, gboolean src_has_alpha,
|
|
int x_init, int x_step, int src_width,
|
|
int check_size, guint32 color1, guint32 color2)
|
|
{
|
|
int x = x_init;
|
|
guchar *src0 = src[0];
|
|
guchar *src1 = src[1];
|
|
|
|
while (dest < dest_end)
|
|
{
|
|
unsigned int r, g, b;
|
|
int x_scaled = x >> SCALE_SHIFT;
|
|
int *pixel_weights;
|
|
guchar *q0, *q1;
|
|
int w1, w2, w3, w4;
|
|
|
|
q0 = src0 + x_scaled * 3;
|
|
q1 = src1 + x_scaled * 3;
|
|
|
|
pixel_weights = weights +
|
|
((x >> (SCALE_SHIFT - SUBSAMPLE_BITS)) & SUBSAMPLE_MASK) * 4;
|
|
|
|
w1 = pixel_weights[0];
|
|
w2 = pixel_weights[1];
|
|
w3 = pixel_weights[2];
|
|
w4 = pixel_weights[3];
|
|
|
|
r = w1 * q0[0];
|
|
g = w1 * q0[1];
|
|
b = w1 * q0[2];
|
|
|
|
r += w2 * q0[3];
|
|
g += w2 * q0[4];
|
|
b += w2 * q0[5];
|
|
|
|
r += w3 * q1[0];
|
|
g += w3 * q1[1];
|
|
b += w3 * q1[2];
|
|
|
|
r += w4 * q1[3];
|
|
g += w4 * q1[4];
|
|
b += w4 * q1[5];
|
|
|
|
dest[0] = (r + 0x8000) >> 16;
|
|
dest[1] = (g + 0x8000) >> 16;
|
|
dest[2] = (b + 0x8000) >> 16;
|
|
|
|
dest += 3;
|
|
x += x_step;
|
|
}
|
|
|
|
return dest;
|
|
}
|
|
|
|
static void
|
|
process_pixel (int *weights, int n_x, int n_y, guchar *dest, int dest_x,
|
|
int dest_channels, int dest_has_alpha, guchar **src,
|
|
int src_channels, gboolean src_has_alpha, int x_start,
|
|
int src_width, int check_size, guint32 color1, guint32 color2,
|
|
PixopsPixelFunc pixel_func)
|
|
{
|
|
unsigned int r = 0, g = 0, b = 0, a = 0;
|
|
int i, j;
|
|
|
|
for (i=0; i<n_y; i++)
|
|
{
|
|
int *line_weights = weights + n_x * i;
|
|
|
|
for (j=0; j<n_x; j++)
|
|
{
|
|
unsigned int ta;
|
|
guchar *q;
|
|
|
|
if (x_start + j < 0)
|
|
q = src[i];
|
|
else if (x_start + j < src_width)
|
|
q = src[i] + (x_start + j) * src_channels;
|
|
else
|
|
q = src[i] + (src_width - 1) * src_channels;
|
|
|
|
if (src_has_alpha)
|
|
ta = q[3] * line_weights[j];
|
|
else
|
|
ta = 0xff * line_weights[j];
|
|
|
|
r += ta * q[0];
|
|
g += ta * q[1];
|
|
b += ta * q[2];
|
|
a += ta;
|
|
}
|
|
}
|
|
|
|
(*pixel_func) (dest, dest_x, dest_channels, dest_has_alpha, src_has_alpha,
|
|
check_size, color1, color2, r, g, b, a);
|
|
}
|
|
|
|
static void
|
|
correct_total (int *weights,
|
|
int n_x,
|
|
int n_y,
|
|
int total,
|
|
double overall_alpha)
|
|
{
|
|
int correction = (int)(0.5 + 65536 * overall_alpha) - total;
|
|
int remaining, c, d, i;
|
|
|
|
if (correction != 0)
|
|
{
|
|
remaining = correction;
|
|
for (d = 1, c = correction; c != 0 && remaining != 0; d++, c = correction / d)
|
|
for (i = n_x * n_y - 1; i >= 0 && c != 0 && remaining != 0; i--)
|
|
if (*(weights + i) + c >= 0)
|
|
{
|
|
*(weights + i) += c;
|
|
remaining -= c;
|
|
if ((0 < remaining && remaining < c) ||
|
|
(0 > remaining && remaining > c))
|
|
c = remaining;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int *
|
|
make_filter_table (PixopsFilter *filter)
|
|
{
|
|
int i_offset, j_offset;
|
|
int n_x = filter->x.n;
|
|
int n_y = filter->y.n;
|
|
int *weights = g_new (int, SUBSAMPLE * SUBSAMPLE * n_x * n_y);
|
|
|
|
for (i_offset=0; i_offset < SUBSAMPLE; i_offset++)
|
|
for (j_offset=0; j_offset < SUBSAMPLE; j_offset++)
|
|
{
|
|
double weight;
|
|
int *pixel_weights = weights + ((i_offset*SUBSAMPLE) + j_offset) * n_x * n_y;
|
|
int total = 0;
|
|
int i, j;
|
|
|
|
for (i=0; i < n_y; i++)
|
|
for (j=0; j < n_x; j++)
|
|
{
|
|
weight = filter->x.weights[(j_offset * n_x) + j] *
|
|
filter->y.weights[(i_offset * n_y) + i] *
|
|
filter->overall_alpha * 65536 + 0.5;
|
|
|
|
total += (int)weight;
|
|
|
|
*(pixel_weights + n_x * i + j) = weight;
|
|
}
|
|
|
|
correct_total (pixel_weights, n_x, n_y, total, filter->overall_alpha);
|
|
}
|
|
|
|
return weights;
|
|
}
|
|
|
|
static void
|
|
pixops_process (guchar *dest_buf,
|
|
int render_x0,
|
|
int render_y0,
|
|
int render_x1,
|
|
int render_y1,
|
|
int dest_rowstride,
|
|
int dest_channels,
|
|
gboolean dest_has_alpha,
|
|
const guchar *src_buf,
|
|
int src_width,
|
|
int src_height,
|
|
int src_rowstride,
|
|
int src_channels,
|
|
gboolean src_has_alpha,
|
|
double scale_x,
|
|
double scale_y,
|
|
int check_x,
|
|
int check_y,
|
|
int check_size,
|
|
guint32 color1,
|
|
guint32 color2,
|
|
PixopsFilter *filter,
|
|
PixopsLineFunc line_func,
|
|
PixopsPixelFunc pixel_func)
|
|
{
|
|
int i, j;
|
|
int x, y; /* X and Y position in source (fixed_point) */
|
|
|
|
guchar **line_bufs;
|
|
int *filter_weights;
|
|
|
|
int x_step;
|
|
int y_step;
|
|
|
|
int check_shift;
|
|
int scaled_x_offset;
|
|
|
|
int run_end_x;
|
|
int run_end_index;
|
|
|
|
x_step = (1 << SCALE_SHIFT) / scale_x; /* X step in source (fixed point) */
|
|
y_step = (1 << SCALE_SHIFT) / scale_y; /* Y step in source (fixed point) */
|
|
|
|
if (x_step == 0 || y_step == 0)
|
|
return; /* overflow, bail out */
|
|
|
|
line_bufs = g_new (guchar *, filter->y.n);
|
|
filter_weights = make_filter_table (filter);
|
|
|
|
check_shift = check_size ? get_check_shift (check_size) : 0;
|
|
|
|
scaled_x_offset = floor (filter->x.offset * (1 << SCALE_SHIFT));
|
|
|
|
/* Compute the index where we run off the end of the source buffer. The
|
|
* furthest source pixel we access at index i is:
|
|
*
|
|
* ((render_x0 + i) * x_step + scaled_x_offset) >> SCALE_SHIFT + filter->x.n - 1
|
|
*
|
|
* So, run_end_index is the smallest i for which this pixel is src_width,
|
|
* i.e, for which:
|
|
*
|
|
* (i + render_x0) * x_step >= ((src_width - filter->x.n + 1) << SCALE_SHIFT) - scaled_x_offset
|
|
*
|
|
*/
|
|
#define MYDIV(a,b) ((a) > 0 ? (a) / (b) : ((a) - (b) + 1) / (b)) /* Division so that -1/5 = -1 */
|
|
|
|
run_end_x = (((src_width - filter->x.n + 1) << SCALE_SHIFT) - scaled_x_offset);
|
|
run_end_index = MYDIV (run_end_x + x_step - 1, x_step) - render_x0;
|
|
run_end_index = MIN (run_end_index, render_x1 - render_x0);
|
|
|
|
y = render_y0 * y_step + floor (filter->y.offset * (1 << SCALE_SHIFT));
|
|
for (i = 0; i < (render_y1 - render_y0); i++)
|
|
{
|
|
int dest_x;
|
|
int y_start = y >> SCALE_SHIFT;
|
|
int x_start;
|
|
int *run_weights = filter_weights +
|
|
((y >> (SCALE_SHIFT - SUBSAMPLE_BITS)) & SUBSAMPLE_MASK) *
|
|
filter->x.n * filter->y.n * SUBSAMPLE;
|
|
guchar *new_outbuf;
|
|
guint32 tcolor1, tcolor2;
|
|
|
|
guchar *outbuf = dest_buf + dest_rowstride * i;
|
|
guchar *outbuf_end = outbuf + dest_channels * (render_x1 - render_x0);
|
|
|
|
if (((i + check_y) >> check_shift) & 1)
|
|
{
|
|
tcolor1 = color2;
|
|
tcolor2 = color1;
|
|
}
|
|
else
|
|
{
|
|
tcolor1 = color1;
|
|
tcolor2 = color2;
|
|
}
|
|
|
|
for (j=0; j<filter->y.n; j++)
|
|
{
|
|
if (y_start < 0)
|
|
line_bufs[j] = (guchar *)src_buf;
|
|
else if (y_start < src_height)
|
|
line_bufs[j] = (guchar *)src_buf + src_rowstride * y_start;
|
|
else
|
|
line_bufs[j] = (guchar *)src_buf + src_rowstride * (src_height - 1);
|
|
|
|
y_start++;
|
|
}
|
|
|
|
dest_x = check_x;
|
|
x = render_x0 * x_step + scaled_x_offset;
|
|
x_start = x >> SCALE_SHIFT;
|
|
|
|
while (x_start < 0 && outbuf < outbuf_end)
|
|
{
|
|
process_pixel (run_weights + ((x >> (SCALE_SHIFT - SUBSAMPLE_BITS)) & SUBSAMPLE_MASK) * (filter->x.n * filter->y.n), filter->x.n, filter->y.n,
|
|
outbuf, dest_x, dest_channels, dest_has_alpha,
|
|
line_bufs, src_channels, src_has_alpha,
|
|
x >> SCALE_SHIFT, src_width,
|
|
check_size, tcolor1, tcolor2, pixel_func);
|
|
|
|
x += x_step;
|
|
x_start = x >> SCALE_SHIFT;
|
|
dest_x++;
|
|
outbuf += dest_channels;
|
|
}
|
|
|
|
new_outbuf = (*line_func) (run_weights, filter->x.n, filter->y.n,
|
|
outbuf, dest_x, dest_buf + dest_rowstride *
|
|
i + run_end_index * dest_channels,
|
|
dest_channels, dest_has_alpha,
|
|
line_bufs, src_channels, src_has_alpha,
|
|
x, x_step, src_width, check_size, tcolor1,
|
|
tcolor2);
|
|
|
|
dest_x += (new_outbuf - outbuf) / dest_channels;
|
|
|
|
x = (dest_x - check_x + render_x0) * x_step + scaled_x_offset;
|
|
outbuf = new_outbuf;
|
|
|
|
while (outbuf < outbuf_end)
|
|
{
|
|
process_pixel (run_weights + ((x >> (SCALE_SHIFT - SUBSAMPLE_BITS)) & SUBSAMPLE_MASK) * (filter->x.n * filter->y.n), filter->x.n, filter->y.n,
|
|
outbuf, dest_x, dest_channels, dest_has_alpha,
|
|
line_bufs, src_channels, src_has_alpha,
|
|
x >> SCALE_SHIFT, src_width,
|
|
check_size, tcolor1, tcolor2, pixel_func);
|
|
|
|
x += x_step;
|
|
dest_x++;
|
|
outbuf += dest_channels;
|
|
}
|
|
|
|
y += y_step;
|
|
}
|
|
|
|
g_free (line_bufs);
|
|
g_free (filter_weights);
|
|
}
|
|
|
|
/* Compute weights for reconstruction by replication followed by
|
|
* sampling with a box filter
|
|
*/
|
|
static void
|
|
tile_make_weights (PixopsFilterDimension *dim,
|
|
double scale)
|
|
{
|
|
int n = ceil (1 / scale + 1);
|
|
double *pixel_weights = g_new (double, SUBSAMPLE * n);
|
|
int offset;
|
|
int i;
|
|
|
|
dim->n = n;
|
|
dim->offset = 0;
|
|
dim->weights = pixel_weights;
|
|
|
|
for (offset = 0; offset < SUBSAMPLE; offset++)
|
|
{
|
|
double x = (double)offset / SUBSAMPLE;
|
|
double a = x + 1 / scale;
|
|
|
|
for (i = 0; i < n; i++)
|
|
{
|
|
if (i < x)
|
|
{
|
|
if (i + 1 > x)
|
|
*(pixel_weights++) = (MIN (i + 1, a) - x) * scale;
|
|
else
|
|
*(pixel_weights++) = 0;
|
|
}
|
|
else
|
|
{
|
|
if (a > i)
|
|
*(pixel_weights++) = (MIN (i + 1, a) - i) * scale;
|
|
else
|
|
*(pixel_weights++) = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Compute weights for a filter that, for minification
|
|
* is the same as 'tiles', and for magnification, is bilinear
|
|
* reconstruction followed by a sampling with a delta function.
|
|
*/
|
|
static void
|
|
bilinear_magnify_make_weights (PixopsFilterDimension *dim,
|
|
double scale)
|
|
{
|
|
double *pixel_weights;
|
|
int n;
|
|
int offset;
|
|
int i;
|
|
|
|
if (scale > 1.0) /* Linear */
|
|
{
|
|
n = 2;
|
|
dim->offset = 0.5 * (1 / scale - 1);
|
|
}
|
|
else /* Tile */
|
|
{
|
|
n = ceil (1.0 + 1.0 / scale);
|
|
dim->offset = 0.0;
|
|
}
|
|
|
|
dim->n = n;
|
|
dim->weights = g_new (double, SUBSAMPLE * n);
|
|
|
|
pixel_weights = dim->weights;
|
|
|
|
for (offset=0; offset < SUBSAMPLE; offset++)
|
|
{
|
|
double x = (double)offset / SUBSAMPLE;
|
|
|
|
if (scale > 1.0) /* Linear */
|
|
{
|
|
for (i = 0; i < n; i++)
|
|
*(pixel_weights++) = (((i == 0) ? (1 - x) : x) / scale) * scale;
|
|
}
|
|
else /* Tile */
|
|
{
|
|
double a = x + 1 / scale;
|
|
|
|
/* x
|
|
* ---------|--.-|----|--.-|------- SRC
|
|
* ------------|---------|--------- DEST
|
|
*/
|
|
for (i = 0; i < n; i++)
|
|
{
|
|
if (i < x)
|
|
{
|
|
if (i + 1 > x)
|
|
*(pixel_weights++) = (MIN (i + 1, a) - x) * scale;
|
|
else
|
|
*(pixel_weights++) = 0;
|
|
}
|
|
else
|
|
{
|
|
if (a > i)
|
|
*(pixel_weights++) = (MIN (i + 1, a) - i) * scale;
|
|
else
|
|
*(pixel_weights++) = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Computes the integral from b0 to b1 of
|
|
*
|
|
* f(x) = x; 0 <= x < 1
|
|
* f(x) = 0; otherwise
|
|
*
|
|
* We combine two of these to compute the convolution of
|
|
* a box filter with a triangular spike.
|
|
*/
|
|
static double
|
|
linear_box_half (double b0, double b1)
|
|
{
|
|
double a0, a1;
|
|
double x0, x1;
|
|
|
|
a0 = 0.;
|
|
a1 = 1.;
|
|
|
|
if (a0 < b0)
|
|
{
|
|
if (a1 > b0)
|
|
{
|
|
x0 = b0;
|
|
x1 = MIN (a1, b1);
|
|
}
|
|
else
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
if (b1 > a0)
|
|
{
|
|
x0 = a0;
|
|
x1 = MIN (a1, b1);
|
|
}
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
return 0.5 * (x1*x1 - x0*x0);
|
|
}
|
|
|
|
/* Compute weights for reconstructing with bilinear
|
|
* interpolation, then sampling with a box filter
|
|
*/
|
|
static void
|
|
bilinear_box_make_weights (PixopsFilterDimension *dim,
|
|
double scale)
|
|
{
|
|
int n = ceil (1/scale + 3.0);
|
|
double *pixel_weights = g_new (double, SUBSAMPLE * n);
|
|
double w;
|
|
int offset, i;
|
|
|
|
dim->offset = -1.0;
|
|
dim->n = n;
|
|
dim->weights = pixel_weights;
|
|
|
|
for (offset = 0; offset < SUBSAMPLE; offset++)
|
|
{
|
|
double x = (double)offset / SUBSAMPLE;
|
|
double a = x + 1 / scale;
|
|
|
|
for (i = 0; i < n; i++)
|
|
{
|
|
w = linear_box_half (0.5 + i - a, 0.5 + i - x);
|
|
w += linear_box_half (1.5 + x - i, 1.5 + a - i);
|
|
|
|
*(pixel_weights++) = w * scale;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
make_weights (PixopsFilter *filter,
|
|
PixopsInterpType interp_type,
|
|
double scale_x,
|
|
double scale_y)
|
|
{
|
|
switch (interp_type)
|
|
{
|
|
case PIXOPS_INTERP_NEAREST:
|
|
g_assert_not_reached ();
|
|
break;
|
|
|
|
case PIXOPS_INTERP_TILES:
|
|
tile_make_weights (&filter->x, scale_x);
|
|
tile_make_weights (&filter->y, scale_y);
|
|
break;
|
|
|
|
case PIXOPS_INTERP_BILINEAR:
|
|
bilinear_magnify_make_weights (&filter->x, scale_x);
|
|
bilinear_magnify_make_weights (&filter->y, scale_y);
|
|
break;
|
|
|
|
case PIXOPS_INTERP_HYPER:
|
|
bilinear_box_make_weights (&filter->x, scale_x);
|
|
bilinear_box_make_weights (&filter->y, scale_y);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
_pixops_composite_color_real (guchar *dest_buf,
|
|
int render_x0,
|
|
int render_y0,
|
|
int render_x1,
|
|
int render_y1,
|
|
int dest_rowstride,
|
|
int dest_channels,
|
|
gboolean dest_has_alpha,
|
|
const guchar *src_buf,
|
|
int src_width,
|
|
int src_height,
|
|
int src_rowstride,
|
|
int src_channels,
|
|
gboolean src_has_alpha,
|
|
double scale_x,
|
|
double scale_y,
|
|
PixopsInterpType interp_type,
|
|
int overall_alpha,
|
|
int check_x,
|
|
int check_y,
|
|
int check_size,
|
|
guint32 color1,
|
|
guint32 color2)
|
|
{
|
|
PixopsFilter filter;
|
|
PixopsLineFunc line_func;
|
|
|
|
#ifdef USE_MMX
|
|
gboolean found_mmx = _pixops_have_mmx ();
|
|
#endif
|
|
|
|
g_return_if_fail (!(dest_channels == 3 && dest_has_alpha));
|
|
g_return_if_fail (!(src_channels == 3 && src_has_alpha));
|
|
|
|
if (scale_x == 0 || scale_y == 0)
|
|
return;
|
|
|
|
if (interp_type == PIXOPS_INTERP_NEAREST)
|
|
{
|
|
pixops_composite_color_nearest (dest_buf, render_x0, render_y0,
|
|
render_x1, render_y1, dest_rowstride,
|
|
dest_channels, dest_has_alpha, src_buf,
|
|
src_width, src_height, src_rowstride,
|
|
src_channels, src_has_alpha, scale_x,
|
|
scale_y, overall_alpha, check_x, check_y,
|
|
check_size, color1, color2);
|
|
return;
|
|
}
|
|
|
|
filter.overall_alpha = overall_alpha / 255.;
|
|
make_weights (&filter, interp_type, scale_x, scale_y);
|
|
|
|
#ifdef USE_MMX
|
|
if (filter.x.n == 2 && filter.y.n == 2 &&
|
|
dest_channels == 4 && src_channels == 4 &&
|
|
src_has_alpha && !dest_has_alpha && found_mmx)
|
|
line_func = composite_line_color_22_4a4_mmx_stub;
|
|
else
|
|
#endif
|
|
line_func = composite_line_color;
|
|
|
|
pixops_process (dest_buf, render_x0, render_y0, render_x1, render_y1,
|
|
dest_rowstride, dest_channels, dest_has_alpha,
|
|
src_buf, src_width, src_height, src_rowstride, src_channels,
|
|
src_has_alpha, scale_x, scale_y, check_x, check_y, check_size, color1, color2,
|
|
&filter, line_func, composite_pixel_color);
|
|
|
|
g_free (filter.x.weights);
|
|
g_free (filter.y.weights);
|
|
}
|
|
|
|
void
|
|
_pixops_composite_color (guchar *dest_buf,
|
|
int dest_width,
|
|
int dest_height,
|
|
int dest_rowstride,
|
|
int dest_channels,
|
|
gboolean dest_has_alpha,
|
|
const guchar *src_buf,
|
|
int src_width,
|
|
int src_height,
|
|
int src_rowstride,
|
|
int src_channels,
|
|
gboolean src_has_alpha,
|
|
int dest_x,
|
|
int dest_y,
|
|
int dest_region_width,
|
|
int dest_region_height,
|
|
double offset_x,
|
|
double offset_y,
|
|
double scale_x,
|
|
double scale_y,
|
|
PixopsInterpType interp_type,
|
|
int overall_alpha,
|
|
int check_x,
|
|
int check_y,
|
|
int check_size,
|
|
guint32 color1,
|
|
guint32 color2)
|
|
{
|
|
guchar *new_dest_buf;
|
|
int render_x0;
|
|
int render_y0;
|
|
int render_x1;
|
|
int render_y1;
|
|
|
|
if (!src_has_alpha && overall_alpha == 255)
|
|
{
|
|
_pixops_scale (dest_buf, dest_width, dest_height, dest_rowstride,
|
|
dest_channels, dest_has_alpha, src_buf, src_width,
|
|
src_height, src_rowstride, src_channels, src_has_alpha,
|
|
dest_x, dest_y, dest_region_width, dest_region_height,
|
|
offset_x, offset_y, scale_x, scale_y, interp_type);
|
|
return;
|
|
}
|
|
|
|
new_dest_buf = dest_buf + dest_y * dest_rowstride + dest_x *
|
|
dest_channels;
|
|
render_x0 = dest_x - offset_x;
|
|
render_y0 = dest_y - offset_y;
|
|
render_x1 = dest_x + dest_region_width - offset_x;
|
|
render_y1 = dest_y + dest_region_height - offset_y;
|
|
|
|
_pixops_composite_color_real (new_dest_buf, render_x0, render_y0, render_x1,
|
|
render_y1, dest_rowstride, dest_channels,
|
|
dest_has_alpha, src_buf, src_width,
|
|
src_height, src_rowstride, src_channels,
|
|
src_has_alpha, scale_x, scale_y,
|
|
(PixopsInterpType)interp_type, overall_alpha,
|
|
check_x, check_y, check_size, color1, color2);
|
|
}
|
|
|
|
/**
|
|
* _pixops_composite_real:
|
|
* @dest_buf: pointer to location to store result
|
|
* @render_x0: x0 of region of scaled source to store into @dest_buf
|
|
* @render_y0: y0 of region of scaled source to store into @dest_buf
|
|
* @render_x1: x1 of region of scaled source to store into @dest_buf
|
|
* @render_y1: y1 of region of scaled source to store into @dest_buf
|
|
* @dest_rowstride: rowstride of @dest_buf
|
|
* @dest_channels: number of channels in @dest_buf
|
|
* @dest_has_alpha: whether @dest_buf has alpha
|
|
* @src_buf: pointer to source pixels
|
|
* @src_width: width of source (used for clipping)
|
|
* @src_height: height of source (used for clipping)
|
|
* @src_rowstride: rowstride of source
|
|
* @src_channels: number of channels in @src_buf
|
|
* @src_has_alpha: whether @src_buf has alpha
|
|
* @scale_x: amount to scale source by in X direction
|
|
* @scale_y: amount to scale source by in Y direction
|
|
* @interp_type: type of enumeration
|
|
* @overall_alpha: overall alpha factor to multiply source by
|
|
*
|
|
* Scale source buffer by scale_x / scale_y, then composite a given rectangle
|
|
* of the result into the destination buffer.
|
|
**/
|
|
static void
|
|
_pixops_composite_real (guchar *dest_buf,
|
|
int render_x0,
|
|
int render_y0,
|
|
int render_x1,
|
|
int render_y1,
|
|
int dest_rowstride,
|
|
int dest_channels,
|
|
gboolean dest_has_alpha,
|
|
const guchar *src_buf,
|
|
int src_width,
|
|
int src_height,
|
|
int src_rowstride,
|
|
int src_channels,
|
|
gboolean src_has_alpha,
|
|
double scale_x,
|
|
double scale_y,
|
|
PixopsInterpType interp_type,
|
|
int overall_alpha)
|
|
{
|
|
PixopsFilter filter;
|
|
PixopsLineFunc line_func;
|
|
|
|
#ifdef USE_MMX
|
|
gboolean found_mmx = _pixops_have_mmx ();
|
|
#endif
|
|
|
|
g_return_if_fail (!(dest_channels == 3 && dest_has_alpha));
|
|
g_return_if_fail (!(src_channels == 3 && src_has_alpha));
|
|
|
|
if (scale_x == 0 || scale_y == 0)
|
|
return;
|
|
|
|
if (interp_type == PIXOPS_INTERP_NEAREST)
|
|
{
|
|
pixops_composite_nearest (dest_buf, render_x0, render_y0, render_x1,
|
|
render_y1, dest_rowstride, dest_channels,
|
|
dest_has_alpha, src_buf, src_width, src_height,
|
|
src_rowstride, src_channels, src_has_alpha,
|
|
scale_x, scale_y, overall_alpha);
|
|
return;
|
|
}
|
|
|
|
filter.overall_alpha = overall_alpha / 255.;
|
|
make_weights (&filter, interp_type, scale_x, scale_y);
|
|
|
|
if (filter.x.n == 2 && filter.y.n == 2 && dest_channels == 4 &&
|
|
src_channels == 4 && src_has_alpha && !dest_has_alpha)
|
|
{
|
|
#ifdef USE_MMX
|
|
if (found_mmx)
|
|
line_func = composite_line_22_4a4_mmx_stub;
|
|
else
|
|
#endif
|
|
line_func = composite_line_22_4a4;
|
|
}
|
|
else
|
|
line_func = composite_line;
|
|
|
|
pixops_process (dest_buf, render_x0, render_y0, render_x1, render_y1,
|
|
dest_rowstride, dest_channels, dest_has_alpha,
|
|
src_buf, src_width, src_height, src_rowstride, src_channels,
|
|
src_has_alpha, scale_x, scale_y, 0, 0, 0, 0, 0,
|
|
&filter, line_func, composite_pixel);
|
|
|
|
g_free (filter.x.weights);
|
|
g_free (filter.y.weights);
|
|
}
|
|
|
|
void
|
|
_pixops_composite (guchar *dest_buf,
|
|
int dest_width,
|
|
int dest_height,
|
|
int dest_rowstride,
|
|
int dest_channels,
|
|
int dest_has_alpha,
|
|
const guchar *src_buf,
|
|
int src_width,
|
|
int src_height,
|
|
int src_rowstride,
|
|
int src_channels,
|
|
int src_has_alpha,
|
|
int dest_x,
|
|
int dest_y,
|
|
int dest_region_width,
|
|
int dest_region_height,
|
|
double offset_x,
|
|
double offset_y,
|
|
double scale_x,
|
|
double scale_y,
|
|
PixopsInterpType interp_type,
|
|
int overall_alpha)
|
|
{
|
|
guchar *new_dest_buf;
|
|
int render_x0;
|
|
int render_y0;
|
|
int render_x1;
|
|
int render_y1;
|
|
|
|
if (!src_has_alpha && overall_alpha == 255)
|
|
{
|
|
_pixops_scale (dest_buf, dest_width, dest_height, dest_rowstride,
|
|
dest_channels, dest_has_alpha, src_buf, src_width,
|
|
src_height, src_rowstride, src_channels, src_has_alpha,
|
|
dest_x, dest_y, dest_region_width, dest_region_height,
|
|
offset_x, offset_y, scale_x, scale_y, interp_type);
|
|
return;
|
|
}
|
|
|
|
#ifdef USE_MEDIALIB
|
|
pixops_medialib_composite (dest_buf, dest_width, dest_height, dest_rowstride,
|
|
dest_channels, dest_has_alpha, src_buf,
|
|
src_width, src_height, src_rowstride,
|
|
src_channels, src_has_alpha, dest_x, dest_y,
|
|
dest_region_width, dest_region_height, offset_x,
|
|
offset_y, scale_x, scale_y,
|
|
(PixopsInterpType)interp_type, overall_alpha);
|
|
return;
|
|
#endif
|
|
|
|
new_dest_buf = dest_buf + dest_y * dest_rowstride + dest_x * dest_channels;
|
|
render_x0 = dest_x - offset_x;
|
|
render_y0 = dest_y - offset_y;
|
|
render_x1 = dest_x + dest_region_width - offset_x;
|
|
render_y1 = dest_y + dest_region_height - offset_y;
|
|
|
|
_pixops_composite_real (new_dest_buf, render_x0, render_y0, render_x1,
|
|
render_y1, dest_rowstride, dest_channels,
|
|
dest_has_alpha, src_buf, src_width, src_height,
|
|
src_rowstride, src_channels, src_has_alpha, scale_x,
|
|
scale_y, (PixopsInterpType)interp_type,
|
|
overall_alpha);
|
|
}
|
|
|
|
#ifdef USE_MEDIALIB
|
|
static void
|
|
medialib_get_interpolation (mlInterp * ml_interp,
|
|
PixopsInterpType interp_type,
|
|
double scale_x,
|
|
double scale_y,
|
|
double overall_alpha)
|
|
{
|
|
mlib_s32 leftPadding, topPadding;
|
|
ml_interp->interp_table = NULL;
|
|
|
|
/*
|
|
* medialib 2.1 and later supports scaling with user-defined interpolation
|
|
* tables, so this logic is used.
|
|
*
|
|
* bilinear_magnify_make_weights builds an interpolation table of size 2x2 if
|
|
* the scale factor >= 1.0 and "ceil (1.0 + 1.0/scale)" otherwise. These map
|
|
* most closely to MLIB_BILINEAR, which uses an interpolation table of size
|
|
* 2x2.
|
|
*
|
|
* tile_make_weights builds an interpolation table of size 2x2 if the scale
|
|
* factor >= 1.0 and "ceil (1.0 + 1.0/scale)" otherwise. These map most
|
|
* closely to MLIB_BILINEAR, which uses an interpolation table of size 2x2.
|
|
*
|
|
* bilinear_box_make_weights builds an interpolation table of size 4x4 if the
|
|
* scale factor >= 1.0 and "ceil (1.0 + 1.0/scale)" otherwise. These map most
|
|
* closely to MLIB_BICUBIC, which uses an interpolation table of size 4x4.
|
|
*
|
|
* PIXOPS_INTERP_NEAREST calls pixops_scale_nearest which does not use an
|
|
* interpolation table. This maps to MLIB_NEAREST.
|
|
*/
|
|
switch (interp_type)
|
|
{
|
|
case PIXOPS_INTERP_BILINEAR:
|
|
bilinear_magnify_make_weights (&(ml_interp->po_filter.x), scale_x);
|
|
bilinear_magnify_make_weights (&(ml_interp->po_filter.y), scale_y);
|
|
leftPadding = 0;
|
|
topPadding = 0;
|
|
|
|
if (scale_x <= 1.0)
|
|
ml_interp->tx = 0.5 * (1 - scale_x);
|
|
else
|
|
ml_interp->tx = 0.0;
|
|
|
|
if (scale_y <= 1.0)
|
|
ml_interp->ty = 0.5 * (1 - scale_y);
|
|
else
|
|
ml_interp->ty = 0.0;
|
|
|
|
break;
|
|
|
|
case PIXOPS_INTERP_TILES:
|
|
tile_make_weights (&(ml_interp->po_filter.x), scale_x);
|
|
tile_make_weights (&(ml_interp->po_filter.y), scale_y);
|
|
leftPadding = 0;
|
|
topPadding = 0;
|
|
ml_interp->tx = 0.5 * (1 - scale_x);
|
|
ml_interp->ty = 0.5 * (1 - scale_y);
|
|
break;
|
|
|
|
case PIXOPS_INTERP_HYPER:
|
|
bilinear_box_make_weights (&(ml_interp->po_filter.x), scale_x);
|
|
bilinear_box_make_weights (&(ml_interp->po_filter.y), scale_y);
|
|
leftPadding = 1;
|
|
topPadding = 1;
|
|
ml_interp->tx = 0.5 * (1 - scale_x);
|
|
ml_interp->ty = 0.5 * (1 - scale_y);
|
|
break;
|
|
|
|
case PIXOPS_INTERP_NEAREST:
|
|
default:
|
|
/*
|
|
* Note that this function should not be called in the
|
|
* PIXOPS_INTERP_NEAREST case since it does not use an interpolation
|
|
* table.
|
|
*/
|
|
g_assert_not_reached ();
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If overall_alpha is not 1.0, then multiply the vectors built by the
|
|
* sqrt (overall_alpha). This will cause overall_alpha to get evenly
|
|
* blended across both axis.
|
|
*
|
|
* Note there is no need to multiply the vectors built by the various
|
|
* make-weight functions by sqrt (overall_alpha) since the make-weight
|
|
* functions are called with overall_alpha hardcoded to 1.0.
|
|
*/
|
|
if (overall_alpha != 1.0)
|
|
{
|
|
double sqrt_alpha = sqrt (overall_alpha);
|
|
int i;
|
|
|
|
for (i=0; i < SUBSAMPLE * ml_interp->po_filter.x.n; i++)
|
|
ml_interp->po_filter.x.weights[i] *= sqrt_alpha;
|
|
for (i=0; i < SUBSAMPLE * ml_interp->po_filter.y.n; i++)
|
|
ml_interp->po_filter.y.weights[i] *= sqrt_alpha;
|
|
}
|
|
|
|
ml_interp->interp_table = (void *) mlib_ImageInterpTableCreate (MLIB_DOUBLE,
|
|
ml_interp->po_filter.x.n, ml_interp->po_filter.y.n, leftPadding,
|
|
topPadding, SUBSAMPLE_BITS, SUBSAMPLE_BITS, 8,
|
|
ml_interp->po_filter.x.weights, ml_interp->po_filter.y.weights);
|
|
|
|
g_free (ml_interp->po_filter.x.weights);
|
|
g_free (ml_interp->po_filter.y.weights);
|
|
}
|
|
|
|
static void
|
|
pixops_medialib_composite (guchar *dest_buf,
|
|
int dest_width,
|
|
int dest_height,
|
|
int dest_rowstride,
|
|
int dest_channels,
|
|
int dest_has_alpha,
|
|
const guchar *src_buf,
|
|
int src_width,
|
|
int src_height,
|
|
int src_rowstride,
|
|
int src_channels,
|
|
int src_has_alpha,
|
|
int dest_x,
|
|
int dest_y,
|
|
int dest_region_width,
|
|
int dest_region_height,
|
|
double offset_x,
|
|
double offset_y,
|
|
double scale_x,
|
|
double scale_y,
|
|
PixopsInterpType interp_type,
|
|
int overall_alpha)
|
|
{
|
|
mlib_blend blend;
|
|
g_return_if_fail (!(dest_channels == 3 && dest_has_alpha));
|
|
g_return_if_fail (!(src_channels == 3 && src_has_alpha));
|
|
|
|
if (scale_x == 0 || scale_y == 0)
|
|
return;
|
|
|
|
if (!medialib_initialized)
|
|
_pixops_use_medialib ();
|
|
|
|
if (!use_medialib)
|
|
{
|
|
/* Use non-mediaLib version */
|
|
_pixops_composite_real (dest_buf + dest_y * dest_rowstride + dest_x *
|
|
dest_channels, dest_x - offset_x, dest_y -
|
|
offset_y, dest_x + dest_region_width - offset_x,
|
|
dest_y + dest_region_height - offset_y,
|
|
dest_rowstride, dest_channels, dest_has_alpha,
|
|
src_buf, src_width, src_height, src_rowstride,
|
|
src_channels, src_has_alpha, scale_x, scale_y,
|
|
interp_type, overall_alpha);
|
|
}
|
|
else
|
|
{
|
|
mlInterp ml_interp;
|
|
mlib_image img_src, img_dest;
|
|
double ml_offset_x, ml_offset_y;
|
|
|
|
if (!src_has_alpha && overall_alpha == 255 &&
|
|
dest_channels <= src_channels)
|
|
{
|
|
pixops_medialib_scale (dest_buf, dest_region_width,
|
|
dest_region_height, dest_rowstride,
|
|
dest_channels, dest_has_alpha, src_buf,
|
|
src_width, src_height, src_rowstride,
|
|
src_channels, src_has_alpha, dest_x, dest_y,
|
|
dest_region_width, dest_region_height,
|
|
offset_x, offset_y, scale_x, scale_y,
|
|
interp_type);
|
|
return;
|
|
}
|
|
|
|
mlib_ImageSetStruct (&img_src, MLIB_BYTE, src_channels,
|
|
src_width, src_height, src_rowstride, src_buf);
|
|
|
|
if (dest_x == 0 && dest_y == 0 &&
|
|
dest_width == dest_region_width &&
|
|
dest_height == dest_region_height)
|
|
{
|
|
mlib_ImageSetStruct (&img_dest, MLIB_BYTE, dest_channels,
|
|
dest_width, dest_height, dest_rowstride,
|
|
dest_buf);
|
|
}
|
|
else
|
|
{
|
|
mlib_u8 *data = dest_buf + (dest_y * dest_rowstride) +
|
|
(dest_x * dest_channels);
|
|
|
|
mlib_ImageSetStruct (&img_dest, MLIB_BYTE, dest_channels,
|
|
dest_region_width, dest_region_height,
|
|
dest_rowstride, data);
|
|
}
|
|
|
|
ml_offset_x = floor (offset_x) - dest_x;
|
|
ml_offset_y = floor (offset_y) - dest_y;
|
|
|
|
if (interp_type == PIXOPS_INTERP_NEAREST)
|
|
{
|
|
blend = src_has_alpha ? MLIB_BLEND_GTK_SRC_OVER2 : MLIB_BLEND_GTK_SRC;
|
|
|
|
mlib_ImageZoomTranslateBlend (&img_dest,
|
|
&img_src,
|
|
scale_x,
|
|
scale_y,
|
|
ml_offset_x,
|
|
ml_offset_y,
|
|
MLIB_NEAREST,
|
|
MLIB_EDGE_SRC_EXTEND_INDEF,
|
|
blend,
|
|
overall_alpha,
|
|
1);
|
|
}
|
|
else
|
|
{
|
|
blend = src_has_alpha ? MLIB_BLEND_GTK_SRC_OVER : MLIB_BLEND_GTK_SRC;
|
|
|
|
if (interp_type == PIXOPS_INTERP_BILINEAR &&
|
|
scale_x > 1.0 && scale_y > 1.0)
|
|
{
|
|
mlib_ImageZoomTranslateBlend (&img_dest,
|
|
&img_src,
|
|
scale_x,
|
|
scale_y,
|
|
ml_offset_x,
|
|
ml_offset_y,
|
|
MLIB_BILINEAR,
|
|
MLIB_EDGE_SRC_EXTEND_INDEF,
|
|
blend,
|
|
overall_alpha,
|
|
1);
|
|
}
|
|
else
|
|
{
|
|
medialib_get_interpolation (&ml_interp, interp_type, scale_x,
|
|
scale_y, overall_alpha/255.0);
|
|
|
|
if (ml_interp.interp_table != NULL)
|
|
{
|
|
mlib_ImageZoomTranslateTableBlend (&img_dest,
|
|
&img_src,
|
|
scale_x,
|
|
scale_y,
|
|
ml_offset_x + ml_interp.tx,
|
|
ml_offset_y + ml_interp.ty,
|
|
ml_interp.interp_table,
|
|
MLIB_EDGE_SRC_EXTEND_INDEF,
|
|
blend,
|
|
1);
|
|
mlib_ImageInterpTableDelete (ml_interp.interp_table);
|
|
}
|
|
else
|
|
{
|
|
/* Should not happen - Use non-mediaLib version */
|
|
_pixops_composite_real (dest_buf + dest_y * dest_rowstride +
|
|
dest_x * dest_channels,
|
|
dest_x - offset_x, dest_y - offset_y,
|
|
dest_x + dest_region_width - offset_x,
|
|
dest_y + dest_region_height - offset_y,
|
|
dest_rowstride, dest_channels,
|
|
dest_has_alpha, src_buf, src_width,
|
|
src_height, src_rowstride,
|
|
src_channels, src_has_alpha, scale_x,
|
|
scale_y, interp_type, overall_alpha);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
_pixops_scale_real (guchar *dest_buf,
|
|
int render_x0,
|
|
int render_y0,
|
|
int render_x1,
|
|
int render_y1,
|
|
int dest_rowstride,
|
|
int dest_channels,
|
|
gboolean dest_has_alpha,
|
|
const guchar *src_buf,
|
|
int src_width,
|
|
int src_height,
|
|
int src_rowstride,
|
|
int src_channels,
|
|
gboolean src_has_alpha,
|
|
double scale_x,
|
|
double scale_y,
|
|
PixopsInterpType interp_type)
|
|
{
|
|
PixopsFilter filter;
|
|
PixopsLineFunc line_func;
|
|
|
|
#ifdef USE_MMX
|
|
gboolean found_mmx = _pixops_have_mmx ();
|
|
#endif
|
|
|
|
g_return_if_fail (!(dest_channels == 3 && dest_has_alpha));
|
|
g_return_if_fail (!(src_channels == 3 && src_has_alpha));
|
|
g_return_if_fail (!(src_has_alpha && !dest_has_alpha));
|
|
|
|
if (scale_x == 0 || scale_y == 0)
|
|
return;
|
|
|
|
if (interp_type == PIXOPS_INTERP_NEAREST)
|
|
{
|
|
pixops_scale_nearest (dest_buf, render_x0, render_y0, render_x1,
|
|
render_y1, dest_rowstride, dest_channels,
|
|
dest_has_alpha, src_buf, src_width, src_height,
|
|
src_rowstride, src_channels, src_has_alpha,
|
|
scale_x, scale_y);
|
|
return;
|
|
}
|
|
|
|
filter.overall_alpha = 1.0;
|
|
make_weights (&filter, interp_type, scale_x, scale_y);
|
|
|
|
if (filter.x.n == 2 && filter.y.n == 2 && dest_channels == 3 && src_channels == 3)
|
|
{
|
|
#ifdef USE_MMX
|
|
if (found_mmx)
|
|
line_func = scale_line_22_33_mmx_stub;
|
|
else
|
|
#endif
|
|
line_func = scale_line_22_33;
|
|
}
|
|
else
|
|
line_func = scale_line;
|
|
|
|
pixops_process (dest_buf, render_x0, render_y0, render_x1, render_y1,
|
|
dest_rowstride, dest_channels, dest_has_alpha,
|
|
src_buf, src_width, src_height, src_rowstride, src_channels,
|
|
src_has_alpha, scale_x, scale_y, 0, 0, 0, 0, 0,
|
|
&filter, line_func, scale_pixel);
|
|
|
|
g_free (filter.x.weights);
|
|
g_free (filter.y.weights);
|
|
}
|
|
|
|
void
|
|
_pixops_scale (guchar *dest_buf,
|
|
int dest_width,
|
|
int dest_height,
|
|
int dest_rowstride,
|
|
int dest_channels,
|
|
int dest_has_alpha,
|
|
const guchar *src_buf,
|
|
int src_width,
|
|
int src_height,
|
|
int src_rowstride,
|
|
int src_channels,
|
|
int src_has_alpha,
|
|
int dest_x,
|
|
int dest_y,
|
|
int dest_region_width,
|
|
int dest_region_height,
|
|
double offset_x,
|
|
double offset_y,
|
|
double scale_x,
|
|
double scale_y,
|
|
PixopsInterpType interp_type)
|
|
{
|
|
guchar *new_dest_buf;
|
|
int render_x0;
|
|
int render_y0;
|
|
int render_x1;
|
|
int render_y1;
|
|
|
|
#ifdef USE_MEDIALIB
|
|
pixops_medialib_scale (dest_buf, dest_width, dest_height, dest_rowstride,
|
|
dest_channels, dest_has_alpha, src_buf, src_width,
|
|
src_height, src_rowstride, src_channels,
|
|
src_has_alpha, dest_x, dest_y, dest_region_width,
|
|
dest_region_height, offset_x, offset_y, scale_x,
|
|
scale_y, (PixopsInterpType)interp_type);
|
|
return;
|
|
#endif
|
|
|
|
new_dest_buf = dest_buf + dest_y * dest_rowstride + dest_x * dest_channels;
|
|
render_x0 = dest_x - offset_x;
|
|
render_y0 = dest_y - offset_y;
|
|
render_x1 = dest_x + dest_region_width - offset_x;
|
|
render_y1 = dest_y + dest_region_height - offset_y;
|
|
|
|
_pixops_scale_real (new_dest_buf, render_x0, render_y0, render_x1,
|
|
render_y1, dest_rowstride, dest_channels,
|
|
dest_has_alpha, src_buf, src_width, src_height,
|
|
src_rowstride, src_channels, src_has_alpha,
|
|
scale_x, scale_y, (PixopsInterpType)interp_type);
|
|
}
|
|
|
|
#ifdef USE_MEDIALIB
|
|
static void
|
|
pixops_medialib_scale (guchar *dest_buf,
|
|
int dest_width,
|
|
int dest_height,
|
|
int dest_rowstride,
|
|
int dest_channels,
|
|
int dest_has_alpha,
|
|
const guchar *src_buf,
|
|
int src_width,
|
|
int src_height,
|
|
int src_rowstride,
|
|
int src_channels,
|
|
int src_has_alpha,
|
|
int dest_x,
|
|
int dest_y,
|
|
int dest_region_width,
|
|
int dest_region_height,
|
|
double offset_x,
|
|
double offset_y,
|
|
double scale_x,
|
|
double scale_y,
|
|
PixopsInterpType interp_type)
|
|
{
|
|
if (scale_x == 0 || scale_y == 0)
|
|
return;
|
|
|
|
if (!medialib_initialized)
|
|
_pixops_use_medialib ();
|
|
|
|
/*
|
|
* We no longer support mediaLib 2.1 because it has a core dumping problem
|
|
* in the mlib_ImageZoomTranslateTable function that has been corrected in
|
|
* 2.2. Although the mediaLib_zoom function could be used, it does not
|
|
* work properly if the source and destination images have different
|
|
* values for "has_alpha" or "num_channels". The complicated if-logic
|
|
* required to support both versions is not worth supporting
|
|
* mediaLib 2.1 moving forward.
|
|
*/
|
|
if (!use_medialib)
|
|
{
|
|
_pixops_scale_real (dest_buf + dest_y * dest_rowstride + dest_x *
|
|
dest_channels, dest_x - offset_x, dest_y - offset_y,
|
|
dest_x + dest_region_width - offset_x,
|
|
dest_y + dest_region_height - offset_y,
|
|
dest_rowstride, dest_channels, dest_has_alpha,
|
|
src_buf, src_width, src_height, src_rowstride,
|
|
src_channels, src_has_alpha, scale_x, scale_y,
|
|
interp_type);
|
|
}
|
|
else
|
|
{
|
|
mlInterp ml_interp;
|
|
mlib_image img_orig_src, img_src, img_dest;
|
|
double ml_offset_x, ml_offset_y;
|
|
guchar *tmp_buf = NULL;
|
|
|
|
mlib_ImageSetStruct (&img_orig_src, MLIB_BYTE, src_channels, src_width,
|
|
src_height, src_rowstride, src_buf);
|
|
|
|
if (dest_x == 0 && dest_y == 0 &&
|
|
dest_width == dest_region_width &&
|
|
dest_height == dest_region_height)
|
|
{
|
|
mlib_ImageSetStruct (&img_dest, MLIB_BYTE, dest_channels,
|
|
dest_width, dest_height, dest_rowstride,
|
|
dest_buf);
|
|
}
|
|
else
|
|
{
|
|
mlib_u8 *data = dest_buf + (dest_y * dest_rowstride) +
|
|
(dest_x * dest_channels);
|
|
|
|
mlib_ImageSetStruct (&img_dest, MLIB_BYTE, dest_channels,
|
|
dest_region_width, dest_region_height,
|
|
dest_rowstride, data);
|
|
}
|
|
|
|
ml_offset_x = floor (offset_x) - dest_x;
|
|
ml_offset_y = floor (offset_y) - dest_y;
|
|
|
|
/*
|
|
* Note that zoomTranslate and zoomTranslateTable are faster
|
|
* than zoomTranslateBlend and zoomTranslateTableBlend. However
|
|
* the faster functions only work in the following case:
|
|
*
|
|
* if (src_channels == dest_channels &&
|
|
* (!src_alpha && interp_table != PIXOPS_INTERP_NEAREST))
|
|
*
|
|
* We use the faster versions if we can.
|
|
*
|
|
* Note when the interp_type is BILINEAR and the interpolation
|
|
* table will be size 2x2 (when both x/y scale factors > 1.0),
|
|
* then we do not bother building the interpolation table. In
|
|
* this case we can just use MLIB_BILINEAR, which is faster than
|
|
* using a specified interpolation table.
|
|
*/
|
|
img_src = img_orig_src;
|
|
|
|
if (!src_has_alpha)
|
|
{
|
|
if (src_channels > dest_channels)
|
|
{
|
|
int channels = 3;
|
|
int rowstride = (channels * src_width + 3) & ~3;
|
|
|
|
tmp_buf = g_malloc (src_rowstride * src_height);
|
|
|
|
if (src_buf != NULL)
|
|
{
|
|
src_channels = channels;
|
|
src_rowstride = rowstride;
|
|
|
|
mlib_ImageSetStruct (&img_src, MLIB_BYTE, src_channels,
|
|
src_width, src_height, src_rowstride,
|
|
tmp_buf);
|
|
mlib_ImageChannelExtract (&img_src, &img_orig_src, 0xE);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (interp_type == PIXOPS_INTERP_NEAREST)
|
|
{
|
|
if (src_channels == dest_channels)
|
|
{
|
|
mlib_ImageZoomTranslate (&img_dest,
|
|
&img_src,
|
|
scale_x,
|
|
scale_y,
|
|
ml_offset_x,
|
|
ml_offset_y,
|
|
MLIB_NEAREST,
|
|
MLIB_EDGE_SRC_EXTEND_INDEF);
|
|
}
|
|
else
|
|
{
|
|
mlib_ImageZoomTranslateBlend (&img_dest,
|
|
&img_src,
|
|
scale_x,
|
|
scale_y,
|
|
ml_offset_x,
|
|
ml_offset_y,
|
|
MLIB_NEAREST,
|
|
MLIB_EDGE_SRC_EXTEND_INDEF,
|
|
MLIB_BLEND_GTK_SRC,
|
|
1.0,
|
|
1);
|
|
}
|
|
}
|
|
else if (src_channels == dest_channels && !src_has_alpha)
|
|
{
|
|
if (interp_type == PIXOPS_INTERP_BILINEAR &&
|
|
scale_x > 1.0 && scale_y > 1.0)
|
|
{
|
|
mlib_ImageZoomTranslate (&img_dest,
|
|
&img_src,
|
|
scale_x,
|
|
scale_y,
|
|
ml_offset_x,
|
|
ml_offset_y,
|
|
MLIB_BILINEAR,
|
|
MLIB_EDGE_SRC_EXTEND_INDEF);
|
|
}
|
|
else
|
|
{
|
|
medialib_get_interpolation (&ml_interp, interp_type,
|
|
scale_x, scale_y, 1.0);
|
|
|
|
if (ml_interp.interp_table != NULL)
|
|
{
|
|
mlib_ImageZoomTranslateTable (&img_dest,
|
|
&img_src,
|
|
scale_x,
|
|
scale_y,
|
|
ml_offset_x + ml_interp.tx,
|
|
ml_offset_y + ml_interp.ty,
|
|
ml_interp.interp_table,
|
|
MLIB_EDGE_SRC_EXTEND_INDEF);
|
|
|
|
mlib_ImageInterpTableDelete (ml_interp.interp_table);
|
|
}
|
|
else
|
|
{
|
|
/* Should not happen. */
|
|
mlib_filter ml_filter;
|
|
|
|
switch (interp_type)
|
|
{
|
|
case PIXOPS_INTERP_BILINEAR:
|
|
ml_filter = MLIB_BILINEAR;
|
|
break;
|
|
|
|
case PIXOPS_INTERP_TILES:
|
|
ml_filter = MLIB_BILINEAR;
|
|
break;
|
|
|
|
case PIXOPS_INTERP_HYPER:
|
|
ml_filter = MLIB_BICUBIC;
|
|
break;
|
|
}
|
|
|
|
mlib_ImageZoomTranslate (&img_dest,
|
|
&img_src,
|
|
scale_x,
|
|
scale_y,
|
|
ml_offset_x,
|
|
ml_offset_y,
|
|
ml_filter,
|
|
MLIB_EDGE_SRC_EXTEND_INDEF);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Deal with case where src_channels != dest_channels || src_has_alpha */
|
|
else if (interp_type == PIXOPS_INTERP_BILINEAR &&
|
|
scale_x > 1.0 && scale_y > 1.0)
|
|
{
|
|
mlib_ImageZoomTranslateBlend (&img_dest,
|
|
&img_src,
|
|
scale_x,
|
|
scale_y,
|
|
ml_offset_x,
|
|
ml_offset_y,
|
|
MLIB_BILINEAR,
|
|
MLIB_EDGE_SRC_EXTEND_INDEF,
|
|
MLIB_BLEND_GTK_SRC,
|
|
1.0,
|
|
1);
|
|
}
|
|
else
|
|
{
|
|
medialib_get_interpolation (&ml_interp, interp_type,
|
|
scale_x, scale_y, 1.0);
|
|
|
|
if (ml_interp.interp_table != NULL)
|
|
{
|
|
mlib_ImageZoomTranslateTableBlend (&img_dest,
|
|
&img_src,
|
|
scale_x,
|
|
scale_y,
|
|
ml_offset_x + ml_interp.tx,
|
|
ml_offset_y + ml_interp.ty,
|
|
ml_interp.interp_table,
|
|
MLIB_EDGE_SRC_EXTEND_INDEF,
|
|
MLIB_BLEND_GTK_SRC,
|
|
1);
|
|
mlib_ImageInterpTableDelete (ml_interp.interp_table);
|
|
}
|
|
else
|
|
{
|
|
mlib_filter ml_filter;
|
|
|
|
switch (interp_type)
|
|
{
|
|
case PIXOPS_INTERP_BILINEAR:
|
|
ml_filter = MLIB_BILINEAR;
|
|
break;
|
|
|
|
case PIXOPS_INTERP_TILES:
|
|
ml_filter = MLIB_BILINEAR;
|
|
break;
|
|
|
|
case PIXOPS_INTERP_HYPER:
|
|
ml_filter = MLIB_BICUBIC;
|
|
break;
|
|
}
|
|
|
|
mlib_ImageZoomTranslate (&img_dest,
|
|
&img_src,
|
|
scale_x,
|
|
scale_y,
|
|
ml_offset_x,
|
|
ml_offset_y,
|
|
ml_filter,
|
|
MLIB_EDGE_SRC_EXTEND_INDEF);
|
|
}
|
|
}
|
|
|
|
if (tmp_buf != NULL)
|
|
g_free (tmp_buf);
|
|
}
|
|
}
|
|
#endif
|