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PIKApp/app/gegl/pika-gegl-loops.cc

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Initial checkin of Pika from heckimp
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.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 <gegl-buffer-backend.h>
extern "C"
{
#include "libpikabase/pikabase.h"
#include "libpikacolor/pikacolor.h"
#include "libpikamath/pikamath.h"
#include "pika-gegl-types.h"
#include "pika-babl.h"
#include "pika-gegl-loops.h"
#include "pika-gegl-loops-sse2.h"
#include "core/pika-atomic.h"
#include "core/pika-utils.h"
#include "core/pikaprogress.h"
#define PIXELS_PER_THREAD \
(/* each thread costs as much as */ 64.0 * 64.0 /* pixels */)
#define SHIFTED_AREA(dest, src) \
const GeglRectangle dest##_area_ = { \
src##_area->x + (dest##_rect->x - src##_rect->x), \
src##_area->y + (dest##_rect->y - src##_rect->y), \
src##_area->width, src##_area->height \
}; \
const GeglRectangle * const dest##_area = &dest##_area_
void
pika_gegl_buffer_copy (GeglBuffer *src_buffer,
const GeglRectangle *src_rect,
GeglAbyssPolicy abyss_policy,
GeglBuffer *dest_buffer,
const GeglRectangle *dest_rect)
{
GeglRectangle real_dest_rect;
g_return_if_fail (GEGL_IS_BUFFER (src_buffer));
g_return_if_fail (GEGL_IS_BUFFER (dest_buffer));
if (! src_rect)
src_rect = gegl_buffer_get_extent (src_buffer);
if (! dest_rect)
dest_rect = src_rect;
real_dest_rect = *dest_rect;
real_dest_rect.width = src_rect->width;
real_dest_rect.height = src_rect->height;
dest_rect = &real_dest_rect;
if (gegl_buffer_get_format (src_buffer) ==
gegl_buffer_get_format (dest_buffer))
{
gboolean skip_abyss = FALSE;
GeglRectangle src_abyss;
GeglRectangle dest_abyss;
if (abyss_policy == GEGL_ABYSS_NONE)
{
src_abyss = *gegl_buffer_get_abyss (src_buffer);
dest_abyss = *gegl_buffer_get_abyss (dest_buffer);
skip_abyss = ! (gegl_rectangle_contains (&src_abyss, src_rect) &&
gegl_rectangle_contains (&dest_abyss, dest_rect));
}
if (skip_abyss)
{
if (src_buffer < dest_buffer)
{
gegl_tile_handler_lock (GEGL_TILE_HANDLER (src_buffer));
gegl_tile_handler_lock (GEGL_TILE_HANDLER (dest_buffer));
}
else
{
gegl_tile_handler_lock (GEGL_TILE_HANDLER (dest_buffer));
gegl_tile_handler_lock (GEGL_TILE_HANDLER (src_buffer));
}
gegl_buffer_set_abyss (src_buffer, src_rect);
gegl_buffer_set_abyss (dest_buffer, dest_rect);
}
gegl_buffer_copy (src_buffer, src_rect, abyss_policy,
dest_buffer, dest_rect);
if (skip_abyss)
{
gegl_buffer_set_abyss (src_buffer, &src_abyss);
gegl_buffer_set_abyss (dest_buffer, &dest_abyss);
gegl_tile_handler_unlock (GEGL_TILE_HANDLER (src_buffer));
gegl_tile_handler_unlock (GEGL_TILE_HANDLER (dest_buffer));
}
}
else
{
gegl_parallel_distribute_area (
src_rect, PIXELS_PER_THREAD,
[=] (const GeglRectangle *src_area)
{
SHIFTED_AREA (dest, src);
gegl_buffer_copy (src_buffer, src_area, abyss_policy,
dest_buffer, dest_area);
});
}
}
void
pika_gegl_clear (GeglBuffer *buffer,
const GeglRectangle *rect)
{
const Babl *format;
gint bpp;
gint n_components;
gint bpc;
gint alpha_offset;
g_return_if_fail (GEGL_IS_BUFFER (buffer));
if (! rect)
rect = gegl_buffer_get_extent (buffer);
format = gegl_buffer_get_format (buffer);
if (! babl_format_has_alpha (format))
return;
bpp = babl_format_get_bytes_per_pixel (format);
n_components = babl_format_get_n_components (format);
bpc = bpp / n_components;
alpha_offset = (n_components - 1) * bpc;
gegl_parallel_distribute_area (
rect, PIXELS_PER_THREAD,
[=] (const GeglRectangle *area)
{
GeglBufferIterator *iter;
iter = gegl_buffer_iterator_new (buffer, area, 0, format,
GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE,
1);
while (gegl_buffer_iterator_next (iter))
{
guint8 *data = (guint8 *) iter->items[0].data;
gint i;
data += alpha_offset;
for (i = 0; i < iter->length; i++)
{
memset (data, 0, bpc);
data += bpp;
}
}
});
}
void
pika_gegl_convolve (GeglBuffer *src_buffer,
const GeglRectangle *src_rect,
GeglBuffer *dest_buffer,
const GeglRectangle *dest_rect,
const gfloat *kernel,
gint kernel_size,
gdouble divisor,
PikaConvolutionType mode,
gboolean alpha_weighting)
{
gfloat *src;
gint src_rowstride;
const Babl *src_format;
const Babl *dest_format;
gint src_components;
gint dest_components;
gfloat offset;
if (! src_rect)
src_rect = gegl_buffer_get_extent (src_buffer);
if (! dest_rect)
dest_rect = gegl_buffer_get_extent (dest_buffer);
src_format = gegl_buffer_get_format (src_buffer);
if (babl_format_is_palette (src_format))
src_format = pika_babl_format (PIKA_RGB,
PIKA_PRECISION_FLOAT_LINEAR,
babl_format_has_alpha (src_format),
babl_format_get_space (src_format));
else
src_format = pika_babl_format (pika_babl_format_get_base_type (src_format),
PIKA_PRECISION_FLOAT_LINEAR,
babl_format_has_alpha (src_format),
babl_format_get_space (src_format));
dest_format = gegl_buffer_get_format (dest_buffer);
if (babl_format_is_palette (dest_format))
dest_format = pika_babl_format (PIKA_RGB,
PIKA_PRECISION_FLOAT_LINEAR,
babl_format_has_alpha (dest_format),
babl_format_get_space (dest_format));
else
dest_format = pika_babl_format (pika_babl_format_get_base_type (dest_format),
PIKA_PRECISION_FLOAT_LINEAR,
babl_format_has_alpha (dest_format),
babl_format_get_space (dest_format));
src_components = babl_format_get_n_components (src_format);
dest_components = babl_format_get_n_components (dest_format);
/* Get source pixel data */
src_rowstride = src_components * src_rect->width;
src = g_new (gfloat, src_rowstride * src_rect->height);
gegl_buffer_get (src_buffer, src_rect, 1.0, src_format, src,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
/* If the mode is NEGATIVE_CONVOL, the offset should be 0.5 */
if (mode == PIKA_NEGATIVE_CONVOL)
{
offset = 0.5;
mode = PIKA_NORMAL_CONVOL;
}
else
{
offset = 0.0;
}
gegl_parallel_distribute_area (
dest_rect, PIXELS_PER_THREAD,
[=] (const GeglRectangle *dest_area)
{
const gint components = src_components;
const gint a_component = components - 1;
const gint margin = kernel_size / 2;
GeglBufferIterator *dest_iter;
/* Set up dest iterator */
dest_iter = gegl_buffer_iterator_new (dest_buffer, dest_area, 0, dest_format,
GEGL_ACCESS_WRITE, GEGL_ABYSS_NONE, 1);
while (gegl_buffer_iterator_next (dest_iter))
{
/* Convolve the src image using the convolution kernel, writing
* to dest Convolve is not tile-enabled--use accordingly
*/
gfloat *dest = (gfloat *) dest_iter->items[0].data;
const gint x1 = 0;
const gint y1 = 0;
const gint x2 = src_rect->width - 1;
const gint y2 = src_rect->height - 1;
const gint dest_x1 = dest_iter->items[0].roi.x;
const gint dest_y1 = dest_iter->items[0].roi.y;
const gint dest_x2 = dest_iter->items[0].roi.x + dest_iter->items[0].roi.width;
const gint dest_y2 = dest_iter->items[0].roi.y + dest_iter->items[0].roi.height;
gint x, y;
for (y = dest_y1; y < dest_y2; y++)
{
gfloat *d = dest;
if (alpha_weighting)
{
for (x = dest_x1; x < dest_x2; x++)
{
const gfloat *m = kernel;
gdouble total[4] = { 0.0, 0.0, 0.0, 0.0 };
gdouble weighted_divisor = 0.0;
gint i, j, b;
for (j = y - margin; j <= y + margin; j++)
{
for (i = x - margin; i <= x + margin; i++, m++)
{
gint xx = CLAMP (i, x1, x2);
gint yy = CLAMP (j, y1, y2);
const gfloat *s = src + yy * src_rowstride + xx * components;
const gfloat a = s[a_component];
if (a)
{
gdouble mult_alpha = *m * a;
weighted_divisor += mult_alpha;
for (b = 0; b < a_component; b++)
total[b] += mult_alpha * s[b];
total[a_component] += mult_alpha;
}
}
}
if (weighted_divisor == 0.0)
weighted_divisor = divisor;
for (b = 0; b < a_component; b++)
total[b] /= weighted_divisor;
total[a_component] /= divisor;
for (b = 0; b < components; b++)
{
total[b] += offset;
if (mode != PIKA_NORMAL_CONVOL && total[b] < 0.0)
total[b] = - total[b];
*d++ = CLAMP (total[b], 0.0, 1.0);
}
}
}
else
{
for (x = dest_x1; x < dest_x2; x++)
{
const gfloat *m = kernel;
gdouble total[4] = { 0.0, 0.0, 0.0, 0.0 };
gint i, j, b;
for (j = y - margin; j <= y + margin; j++)
{
for (i = x - margin; i <= x + margin; i++, m++)
{
gint xx = CLAMP (i, x1, x2);
gint yy = CLAMP (j, y1, y2);
const gfloat *s = src + yy * src_rowstride + xx * components;
for (b = 0; b < components; b++)
total[b] += *m * s[b];
}
}
for (b = 0; b < components; b++)
{
total[b] = total[b] / divisor + offset;
if (mode != PIKA_NORMAL_CONVOL && total[b] < 0.0)
total[b] = - total[b];
*d++ = CLAMP (total[b], 0.0, 1.0);
}
}
}
dest += dest_iter->items[0].roi.width * dest_components;
}
}
});
g_free (src);
}
static inline gfloat
odd_powf (gfloat x,
gfloat y)
{
if (x >= 0.0f)
return powf ( x, y);
else
return -powf (-x, y);
}
void
pika_gegl_dodgeburn (GeglBuffer *src_buffer,
const GeglRectangle *src_rect,
GeglBuffer *dest_buffer,
const GeglRectangle *dest_rect,
gdouble exposure,
PikaDodgeBurnType type,
PikaTransferMode mode)
{
if (type == PIKA_DODGE_BURN_TYPE_BURN)
exposure = -exposure;
if (! src_rect)
src_rect = gegl_buffer_get_extent (src_buffer);
if (! dest_rect)
dest_rect = gegl_buffer_get_extent (dest_buffer);
gegl_parallel_distribute_area (
src_rect, PIXELS_PER_THREAD,
[=] (const GeglRectangle *src_area)
{
GeglBufferIterator *iter;
SHIFTED_AREA (dest, src);
iter = gegl_buffer_iterator_new (src_buffer, src_area, 0,
babl_format ("R'G'B'A float"),
GEGL_ACCESS_READ, GEGL_ABYSS_NONE, 2);
gegl_buffer_iterator_add (iter, dest_buffer, dest_area, 0,
babl_format ("R'G'B'A float"),
GEGL_ACCESS_WRITE, GEGL_ABYSS_NONE);
switch (mode)
{
gfloat factor;
case PIKA_TRANSFER_HIGHLIGHTS:
factor = 1.0 + exposure * (0.333333);
while (gegl_buffer_iterator_next (iter))
{
gfloat *src = (gfloat *) iter->items[0].data;
gfloat *dest = (gfloat *) iter->items[1].data;
gint count = iter->length;
while (count--)
{
*dest++ = *src++ * factor;
*dest++ = *src++ * factor;
*dest++ = *src++ * factor;
*dest++ = *src++;
}
}
break;
case PIKA_TRANSFER_MIDTONES:
if (exposure < 0)
factor = 1.0 - exposure * (0.333333);
else
factor = 1.0 / (1.0 + exposure);
while (gegl_buffer_iterator_next (iter))
{
gfloat *src = (gfloat *) iter->items[0].data;
gfloat *dest = (gfloat *) iter->items[1].data;
gint count = iter->length;
while (count--)
{
*dest++ = odd_powf (*src++, factor);
*dest++ = odd_powf (*src++, factor);
*dest++ = odd_powf (*src++, factor);
*dest++ = *src++;
}
}
break;
case PIKA_TRANSFER_SHADOWS:
if (exposure >= 0)
factor = 0.333333 * exposure;
else
factor = -0.333333 * exposure;
while (gegl_buffer_iterator_next (iter))
{
gfloat *src = (gfloat *) iter->items[0].data;
gfloat *dest = (gfloat *) iter->items[1].data;
gint count = iter->length;
while (count--)
{
if (exposure >= 0)
{
gfloat s;
s = *src++; *dest++ = factor + s - factor * s;
s = *src++; *dest++ = factor + s - factor * s;
s = *src++; *dest++ = factor + s - factor * s;
}
else
{
gfloat s;
s = *src++;
if (s < factor)
*dest++ = 0;
else /* factor <= value <=1 */
*dest++ = (s - factor) / (1.0 - factor);
s = *src++;
if (s < factor)
*dest++ = 0;
else /* factor <= value <=1 */
*dest++ = (s - factor) / (1.0 - factor);
s = *src++;
if (s < factor)
*dest++ = 0;
else /* factor <= value <=1 */
*dest++ = (s - factor) / (1.0 - factor);
}
*dest++ = *src++;
}
}
break;
}
});
}
/* helper function of pika_gegl_smudge_with_paint_process()
src and dest can be the same address
*/
static inline void
pika_gegl_smudge_with_paint_blend (const gfloat *src1,
gfloat src1_rate,
const gfloat *src2,
gfloat src2_rate,
gfloat *dest,
gboolean no_erasing_src2)
{
gfloat orginal_src2_alpha;
gfloat src1_alpha;
gfloat src2_alpha;
gfloat result_alpha;
gint b;
orginal_src2_alpha = src2[3];
src1_alpha = src1_rate * src1[3];
src2_alpha = src2_rate * orginal_src2_alpha;
result_alpha = src1_alpha + src2_alpha;
if (result_alpha == 0)
{
memset (dest, 0, sizeof (gfloat) * 4);
return;
}
for (b = 0; b < 3; b++)
dest[b] = (src1[b] * src1_alpha + src2[b] * src2_alpha) / 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() */
static void
pika_gegl_smudge_with_paint_process (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 (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 (src1, flow, accum, 1 - flow,
paint, no_erasing);
}
accum += 4;
canvas += 4;
paint += 4;
}
}
/* smudge painting calculation. Currently only smudge tool uses this function
* Accum = rate*Accum + (1-rate)*Canvas
* if brush_color!=NULL
* Paint = flow*brushColor + (1-flow)*Accum
* else
* Paint = flow*Paint + (1-flow)*Accum
*/
void
pika_gegl_smudge_with_paint (GeglBuffer *accum_buffer,
const GeglRectangle *accum_rect,
GeglBuffer *canvas_buffer,
const GeglRectangle *canvas_rect,
const PikaRGB *brush_color,
GeglBuffer *paint_buffer,
gboolean no_erasing,
gdouble flow,
gdouble rate)
{
gfloat brush_color_float[4];
gfloat brush_a = flow;
GeglAccessMode paint_buffer_access_mode = (brush_color ?
GEGL_ACCESS_WRITE :
GEGL_ACCESS_READWRITE);
#if COMPILE_SSE2_INTRINISICS
gboolean sse2 = (pika_cpu_accel_get_support () &
PIKA_CPU_ACCEL_X86_SSE2);
#endif
if (! accum_rect)
accum_rect = gegl_buffer_get_extent (accum_buffer);
if (! canvas_rect)
canvas_rect = gegl_buffer_get_extent (canvas_buffer);
/* convert brush color from double to float */
if (brush_color)
{
const gdouble *brush_color_ptr = &brush_color->r;
gint b;
for (b = 0; b < 4; b++)
brush_color_float[b] = brush_color_ptr[b];
brush_a *= brush_color_ptr[3];
}
gegl_parallel_distribute_area (
accum_rect, PIXELS_PER_THREAD,
[=] (const GeglRectangle *accum_area)
{
GeglBufferIterator *iter;
SHIFTED_AREA (canvas, accum);
iter = gegl_buffer_iterator_new (accum_buffer, accum_area, 0,
babl_format ("RGBA float"),
GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE, 3);
gegl_buffer_iterator_add (iter, canvas_buffer, canvas_area, 0,
babl_format ("RGBA float"),
GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
gegl_buffer_iterator_add (iter, paint_buffer,
GEGL_RECTANGLE (accum_area->x - accum_rect->x,
accum_area->y - accum_rect->y,
0, 0),
0,
babl_format ("RGBA float"),
paint_buffer_access_mode, GEGL_ABYSS_NONE);
while (gegl_buffer_iterator_next (iter))
{
gfloat *accum = (gfloat *) iter->items[0].data;
const gfloat *canvas = (const gfloat *) iter->items[1].data;
gfloat *paint = (gfloat *) iter->items[2].data;
gint count = iter->length;
#if COMPILE_SSE2_INTRINISICS
if (sse2 && ((guintptr) accum |
(guintptr) canvas |
(guintptr) (brush_color ? brush_color_float : paint) |
(guintptr) paint) % 16 == 0)
{
pika_gegl_smudge_with_paint_process_sse2 (accum, canvas, paint, count,
brush_color ? brush_color_float :
NULL,
brush_a,
no_erasing, flow, rate);
}
else
#endif
{
pika_gegl_smudge_with_paint_process (accum, canvas, paint, count,
brush_color ? brush_color_float :
NULL,
brush_a,
no_erasing, flow, rate);
}
}
});
}
void
pika_gegl_apply_mask (GeglBuffer *mask_buffer,
const GeglRectangle *mask_rect,
GeglBuffer *dest_buffer,
const GeglRectangle *dest_rect,
gdouble opacity)
{
if (! mask_rect)
mask_rect = gegl_buffer_get_extent (mask_buffer);
if (! dest_rect)
dest_rect = gegl_buffer_get_extent (dest_buffer);
gegl_parallel_distribute_area (
mask_rect, PIXELS_PER_THREAD,
[=] (const GeglRectangle *mask_area)
{
GeglBufferIterator *iter;
SHIFTED_AREA (dest, mask);
iter = gegl_buffer_iterator_new (mask_buffer, mask_area, 0,
babl_format ("Y float"),
GEGL_ACCESS_READ, GEGL_ABYSS_NONE, 2);
gegl_buffer_iterator_add (iter, dest_buffer, dest_area, 0,
babl_format ("RGBA float"),
GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE);
while (gegl_buffer_iterator_next (iter))
{
const gfloat *mask = (const gfloat *) iter->items[0].data;
gfloat *dest = (gfloat *) iter->items[1].data;
gint count = iter->length;
while (count--)
{
dest[3] *= *mask * opacity;
mask += 1;
dest += 4;
}
}
});
}
void
pika_gegl_combine_mask (GeglBuffer *mask_buffer,
const GeglRectangle *mask_rect,
GeglBuffer *dest_buffer,
const GeglRectangle *dest_rect,
gdouble opacity)
{
if (! mask_rect)
mask_rect = gegl_buffer_get_extent (mask_buffer);
if (! dest_rect)
dest_rect = gegl_buffer_get_extent (dest_buffer);
gegl_parallel_distribute_area (
mask_rect, PIXELS_PER_THREAD,
[=] (const GeglRectangle *mask_area)
{
GeglBufferIterator *iter;
SHIFTED_AREA (dest, mask);
iter = gegl_buffer_iterator_new (mask_buffer, mask_area, 0,
babl_format ("Y float"),
GEGL_ACCESS_READ, GEGL_ABYSS_NONE, 2);
gegl_buffer_iterator_add (iter, dest_buffer, dest_area, 0,
babl_format ("Y float"),
GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE);
while (gegl_buffer_iterator_next (iter))
{
const gfloat *mask = (const gfloat *) iter->items[0].data;
gfloat *dest = (gfloat *) iter->items[1].data;
gint count = iter->length;
while (count--)
{
*dest *= *mask * opacity;
mask += 1;
dest += 1;
}
}
});
}
void
pika_gegl_combine_mask_weird (GeglBuffer *mask_buffer,
const GeglRectangle *mask_rect,
GeglBuffer *dest_buffer,
const GeglRectangle *dest_rect,
gdouble opacity,
gboolean stipple)
{
if (! mask_rect)
mask_rect = gegl_buffer_get_extent (mask_buffer);
if (! dest_rect)
dest_rect = gegl_buffer_get_extent (dest_buffer);
gegl_parallel_distribute_area (
mask_rect, PIXELS_PER_THREAD,
[=] (const GeglRectangle *mask_area)
{
GeglBufferIterator *iter;
SHIFTED_AREA (dest, mask);
iter = gegl_buffer_iterator_new (mask_buffer, mask_area, 0,
babl_format ("Y float"),
GEGL_ACCESS_READ, GEGL_ABYSS_NONE, 2);
gegl_buffer_iterator_add (iter, dest_buffer, dest_area, 0,
babl_format ("Y float"),
GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE);
while (gegl_buffer_iterator_next (iter))
{
const gfloat *mask = (const gfloat *) iter->items[0].data;
gfloat *dest = (gfloat *) iter->items[1].data;
gint count = iter->length;
if (stipple)
{
while (count--)
{
dest[0] += (1.0 - dest[0]) * *mask * opacity;
mask += 1;
dest += 1;
}
}
else
{
while (count--)
{
if (opacity > dest[0])
dest[0] += (opacity - dest[0]) * *mask * opacity;
mask += 1;
dest += 1;
}
}
}
});
}
void
pika_gegl_index_to_mask (GeglBuffer *indexed_buffer,
const GeglRectangle *indexed_rect,
const Babl *indexed_format,
GeglBuffer *mask_buffer,
const GeglRectangle *mask_rect,
gint index)
{
if (! indexed_rect)
indexed_rect = gegl_buffer_get_extent (indexed_buffer);
if (! mask_rect)
mask_rect = gegl_buffer_get_extent (mask_buffer);
gegl_parallel_distribute_area (
indexed_rect, PIXELS_PER_THREAD,
[=] (const GeglRectangle *indexed_area)
{
GeglBufferIterator *iter;
SHIFTED_AREA (mask, indexed);
iter = gegl_buffer_iterator_new (indexed_buffer, indexed_area, 0,
indexed_format,
GEGL_ACCESS_READ, GEGL_ABYSS_NONE, 2);
gegl_buffer_iterator_add (iter, mask_buffer, mask_area, 0,
babl_format ("Y float"),
GEGL_ACCESS_WRITE, GEGL_ABYSS_NONE);
while (gegl_buffer_iterator_next (iter))
{
const guchar *indexed = (const guchar *) iter->items[0].data;
gfloat *mask = (gfloat *) iter->items[1].data;
gint count = iter->length;
while (count--)
{
if (*indexed == index)
*mask = 1.0;
else
*mask = 0.0;
indexed++;
mask++;
}
}
});
}
Updated with upstream update
2023-10-30 23:55:30 +01:00
gboolean
pika_gegl_is_index_used (GeglBuffer *indexed_buffer,
const GeglRectangle *indexed_rect,
const Babl *indexed_format,
gint index)
{
GeglBufferIterator *iter;
gboolean found = FALSE;
if (! indexed_rect)
indexed_rect = gegl_buffer_get_extent (indexed_buffer);
iter = gegl_buffer_iterator_new (indexed_buffer, indexed_rect, 0,
indexed_format,
GEGL_ACCESS_READ, GEGL_ABYSS_NONE, 1);
/* I initially had an implementation using gegl_parallel_distribute_area()
* which turned out to be much slower than the simpler iteration on the whole
* buffer at once. I think the cost of threading and using GRWLock is just far
* too high for such very basic value check.
* See gegl_parallel_distribute_area() implementation in commit dbaa8b6a1c.
*/
while (gegl_buffer_iterator_next (iter))
{
const guchar *indexed = (const guchar *) iter->items[0].data;
gint count = iter->length;
while (count--)
{
if (*indexed == index)
{
/*
* Position of one item using this color index:
gint x = iter->items[0].roi.x + (iter->length - count - 1) % iter->items[0].roi.width;
gint y = iter->items[0].roi.y + (gint) ((iter->length - count - 1) / iter->items[0].roi.width);
*/
found = TRUE;
break;
}
indexed++;
}
if (found)
{
gegl_buffer_iterator_stop (iter);
break;
}
}
return found;
}
void
pika_gegl_shift_index (GeglBuffer *indexed_buffer,
const GeglRectangle *indexed_rect,
const Babl *indexed_format,
gint from_index,
gint shift)
{
gboolean indexed_format_has_alpha;
if (! indexed_rect)
indexed_rect = gegl_buffer_get_extent (indexed_buffer);
indexed_format_has_alpha = babl_format_has_alpha (indexed_format);
gegl_parallel_distribute_area (
indexed_rect, PIXELS_PER_THREAD,
[=] (const GeglRectangle *indexed_area)
{
GeglBufferIterator *iter;
iter = gegl_buffer_iterator_new (indexed_buffer, indexed_area, 0,
indexed_format,
GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE, 1);
while (gegl_buffer_iterator_next (iter))
{
guchar *indexed = (guchar *) iter->items[0].data;
gint count = iter->length;
while (count--)
{
if (*indexed >= from_index)
*indexed += shift;
indexed += (indexed_format_has_alpha ? 2 : 1);
}
}
});
}
Initial checkin of Pika from heckimp
2023-09-26 00:35:21 +02:00
static void
pika_gegl_convert_color_profile_progress (PikaProgress *progress,
gdouble value)
{
if (gegl_is_main_thread ())
pika_progress_set_value (progress, value);
}
void
pika_gegl_convert_color_profile (GeglBuffer *src_buffer,
const GeglRectangle *src_rect,
PikaColorProfile *src_profile,
GeglBuffer *dest_buffer,
const GeglRectangle *dest_rect,
PikaColorProfile *dest_profile,
PikaColorRenderingIntent intent,
gboolean bpc,
PikaProgress *progress)
{
PikaColorTransform *transform;
guint flags = 0;
const Babl *src_format;
const Babl *dest_format;
g_return_if_fail (GEGL_IS_BUFFER (src_buffer));
g_return_if_fail (PIKA_IS_COLOR_PROFILE (src_profile));
g_return_if_fail (GEGL_IS_BUFFER (dest_buffer));
g_return_if_fail (PIKA_IS_COLOR_PROFILE (dest_profile));
g_return_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress));
src_format = gegl_buffer_get_format (src_buffer);
dest_format = gegl_buffer_get_format (dest_buffer);
if (bpc)
flags |= PIKA_COLOR_TRANSFORM_FLAGS_BLACK_POINT_COMPENSATION;
flags |= PIKA_COLOR_TRANSFORM_FLAGS_NOOPTIMIZE;
transform = pika_color_transform_new (src_profile, src_format,
dest_profile, dest_format,
intent,
(PikaColorTransformFlags) flags);
if (! src_rect)
src_rect = gegl_buffer_get_extent (src_buffer);
if (! dest_rect)
dest_rect = gegl_buffer_get_extent (dest_buffer);
if (transform)
{
if (progress)
{
g_signal_connect_swapped (
transform, "progress",
G_CALLBACK (pika_gegl_convert_color_profile_progress),
progress);
}
PIKA_TIMER_START ();
gegl_parallel_distribute_area (
src_rect, PIXELS_PER_THREAD,
[=] (const GeglRectangle *src_area)
{
SHIFTED_AREA (dest, src);
pika_color_transform_process_buffer (transform,
src_buffer, src_area,
dest_buffer, dest_area);
});
PIKA_TIMER_END ("converting buffer");
g_object_unref (transform);
}
else
{
pika_gegl_buffer_copy (src_buffer, src_rect, GEGL_ABYSS_NONE,
dest_buffer, dest_rect);
if (progress)
pika_progress_set_value (progress, 1.0);
}
}
void
pika_gegl_average_color (GeglBuffer *buffer,
const GeglRectangle *rect,
gboolean clip_to_buffer,
GeglAbyssPolicy abyss_policy,
const Babl *format,
gpointer color)
{
typedef struct
{
gfloat color[4];
gint n;
} Sum;
const Babl *average_format;
GeglRectangle roi;
GSList *sums = NULL;
GSList *list;
Sum average = {};
gint c;
g_return_if_fail (GEGL_IS_BUFFER (buffer));
g_return_if_fail (color != NULL);
average_format = babl_format_with_space ("RaGaBaA float",
babl_format_get_space (format));
if (! rect)
rect = gegl_buffer_get_extent (buffer);
if (! format)
format = gegl_buffer_get_format (buffer);
if (clip_to_buffer)
gegl_rectangle_intersect (&roi, rect, gegl_buffer_get_extent (buffer));
else
roi = *rect;
gegl_parallel_distribute_area (
&roi, PIXELS_PER_THREAD,
[&] (const GeglRectangle *area)
{
Sum *sum;
GeglBufferIterator *iter;
gfloat color[4] = {};
gint n = 0;
iter = gegl_buffer_iterator_new (buffer, area, 0, average_format,
GEGL_BUFFER_READ, abyss_policy, 1);
while (gegl_buffer_iterator_next (iter))
{
const gfloat *p = (const gfloat *) iter->items[0].data;
gint i;
for (i = 0; i < iter->length; i++)
{
gint c;
for (c = 0; c < 4; c++)
color[c] += p[c];
p += 4;
}
n += iter->length;
}
sum = g_slice_new (Sum);
memcpy (sum->color, color, sizeof (color));
sum->n = n;
pika_atomic_slist_push_head (&sums, sum);
});
for (list = sums; list; list = g_slist_next (list))
{
Sum *sum = (Sum *) list->data;
for (c = 0; c < 4; c++)
average.color[c] += sum->color[c];
average.n += sum->n;
g_slice_free (Sum, sum);
}
g_slist_free (sums);
if (average.n > 0)
{
for (c = 0; c < 4; c++)
average.color[c] /= average.n;
}
babl_process (babl_fish (average_format, format), average.color, color, 1);
}
} /* extern "C" */