PIKApp/app/gegl/pika-gegl-loops-sse2.c

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2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* pika-gegl-loops-sse2.c
* Copyright (C) 2012 Michael Natterer <mitch@gimp.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <cairo.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "pika-gegl-types.h"
#include "pika-gegl-loops-sse2.h"
#if COMPILE_SSE2_INTRINISICS
#include <emmintrin.h>
/* helper function of pika_gegl_smudge_with_paint_process_sse2()
* src and dest can be the same address
*/
static inline void
pika_gegl_smudge_with_paint_blend_sse2 (const gfloat *src1,
gfloat src1_rate,
const gfloat *src2,
gfloat src2_rate,
gfloat *dest,
gboolean no_erasing_src2)
{
/* 2017/4/13 shark0r : According to my test, SSE decreases about 25%
* execution time
*/
__m128 v_src1 = _mm_loadu_ps (src1);
__m128 v_src2 = _mm_loadu_ps (src2);
__m128 *v_dest = (__v4sf *) dest;
gfloat orginal_src2_alpha;
gfloat src1_alpha;
gfloat src2_alpha;
gfloat result_alpha;
orginal_src2_alpha = v_src2[3];
src1_alpha = src1_rate * v_src1[3];
src2_alpha = src2_rate * orginal_src2_alpha;
result_alpha = src1_alpha + src2_alpha;
if (result_alpha == 0)
{
*v_dest = _mm_set1_ps (0);
return;
}
*v_dest = (v_src1 * _mm_set1_ps (src1_alpha) +
v_src2 * _mm_set1_ps (src2_alpha)) /
_mm_set1_ps (result_alpha);
if (no_erasing_src2)
{
result_alpha = MAX (result_alpha, orginal_src2_alpha);
}
dest[3] = result_alpha;
}
/* helper function of pika_gegl_smudge_with_paint()
*
* note that it's the caller's responsibility to verify that the buffers are
* properly aligned
*/
void
pika_gegl_smudge_with_paint_process_sse2 (gfloat *accum,
const gfloat *canvas,
gfloat *paint,
gint count,
const gfloat *brush_color,
gfloat brush_a,
gboolean no_erasing,
gfloat flow,
gfloat rate)
{
while (count--)
{
/* blend accum_buffer and canvas_buffer to accum_buffer */
pika_gegl_smudge_with_paint_blend_sse2 (accum, rate, canvas, 1 - rate,
accum, no_erasing);
/* blend accum_buffer and brush color/pixmap to paint_buffer */
if (brush_a == 0) /* pure smudge */
{
memcpy (paint, accum, sizeof (gfloat) * 4);
}
else
{
const gfloat *src1 = brush_color ? brush_color : paint;
pika_gegl_smudge_with_paint_blend_sse2 (src1, flow, accum, 1 - flow,
paint, no_erasing);
}
accum += 4;
canvas += 4;
paint += 4;
}
}
#endif /* COMPILE_SSE2_INTRINISICS */