mirror of https://github.com/GNOME/gimp.git
824 lines
27 KiB
C
824 lines
27 KiB
C
/* GIMP - The GNU Image Manipulation Program
|
|
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
|
|
*
|
|
* gimp-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 <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <string.h>
|
|
|
|
#include <cairo.h>
|
|
#include <gdk-pixbuf/gdk-pixbuf.h>
|
|
#include <gegl.h>
|
|
|
|
#include "libgimpbase/gimpbase.h"
|
|
#include "libgimpcolor/gimpcolor.h"
|
|
#include "libgimpmath/gimpmath.h"
|
|
|
|
#include "gimp-gegl-types.h"
|
|
|
|
#include "gimp-babl.h"
|
|
#include "gimp-gegl-loops.h"
|
|
#include "gimp-gegl-loops-sse2.h"
|
|
|
|
#include "core/gimp-utils.h"
|
|
#include "core/gimpprogress.h"
|
|
|
|
|
|
void
|
|
gimp_gegl_convolve (GeglBuffer *src_buffer,
|
|
const GeglRectangle *src_rect,
|
|
GeglBuffer *dest_buffer,
|
|
const GeglRectangle *dest_rect,
|
|
const gfloat *kernel,
|
|
gint kernel_size,
|
|
gdouble divisor,
|
|
GimpConvolutionType mode,
|
|
gboolean alpha_weighting)
|
|
{
|
|
GeglBufferIterator *dest_iter;
|
|
gfloat *src;
|
|
gint src_rowstride;
|
|
|
|
const Babl *src_format;
|
|
const Babl *dest_format;
|
|
gint src_components;
|
|
gint dest_components;
|
|
|
|
src_format = gegl_buffer_get_format (src_buffer);
|
|
|
|
if (babl_format_is_palette (src_format))
|
|
src_format = gimp_babl_format (GIMP_RGB,
|
|
GIMP_PRECISION_FLOAT_LINEAR,
|
|
babl_format_has_alpha (src_format));
|
|
else
|
|
src_format = gimp_babl_format (gimp_babl_format_get_base_type (src_format),
|
|
GIMP_PRECISION_FLOAT_LINEAR,
|
|
babl_format_has_alpha (src_format));
|
|
|
|
dest_format = gegl_buffer_get_format (dest_buffer);
|
|
|
|
if (babl_format_is_palette (dest_format))
|
|
dest_format = gimp_babl_format (GIMP_RGB,
|
|
GIMP_PRECISION_FLOAT_LINEAR,
|
|
babl_format_has_alpha (dest_format));
|
|
else
|
|
dest_format = gimp_babl_format (gimp_babl_format_get_base_type (dest_format),
|
|
GIMP_PRECISION_FLOAT_LINEAR,
|
|
babl_format_has_alpha (dest_format));
|
|
|
|
src_components = babl_format_get_n_components (src_format);
|
|
dest_components = babl_format_get_n_components (dest_format);
|
|
|
|
/* Set up dest iterator */
|
|
dest_iter = gegl_buffer_iterator_new (dest_buffer, dest_rect, 0, dest_format,
|
|
GEGL_ACCESS_WRITE, GEGL_ABYSS_NONE);
|
|
|
|
/* Get source pixel data */
|
|
src_rowstride = src_components * src_rect->width;
|
|
src = g_malloc (sizeof(gfloat) * src_rowstride * src_rect->height);
|
|
gegl_buffer_get (src_buffer, src_rect, 1.0, src_format, src,
|
|
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
|
|
|
|
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 = dest_iter->data[0];
|
|
const gint components = src_components;
|
|
const gint a_component = components - 1;
|
|
const gint margin = kernel_size / 2;
|
|
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->roi[0].x;
|
|
const gint dest_y1 = dest_iter->roi[0].y;
|
|
const gint dest_x2 = dest_iter->roi[0].x + dest_iter->roi[0].width;
|
|
const gint dest_y2 = dest_iter->roi[0].y + dest_iter->roi[0].height;
|
|
gint x, y;
|
|
gfloat offset;
|
|
|
|
/* If the mode is NEGATIVE_CONVOL, the offset should be 128 */
|
|
if (mode == GIMP_NEGATIVE_CONVOL)
|
|
{
|
|
offset = 0.5;
|
|
mode = GIMP_NORMAL_CONVOL;
|
|
}
|
|
else
|
|
{
|
|
offset = 0.0;
|
|
}
|
|
|
|
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 != GIMP_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 != GIMP_NORMAL_CONVOL && total[b] < 0.0)
|
|
total[b] = - total[b];
|
|
|
|
*d++ = CLAMP (total[b], 0.0, 1.0);
|
|
}
|
|
}
|
|
}
|
|
|
|
dest += dest_iter->roi[0].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
|
|
gimp_gegl_dodgeburn (GeglBuffer *src_buffer,
|
|
const GeglRectangle *src_rect,
|
|
GeglBuffer *dest_buffer,
|
|
const GeglRectangle *dest_rect,
|
|
gdouble exposure,
|
|
GimpDodgeBurnType type,
|
|
GimpTransferMode mode)
|
|
{
|
|
GeglBufferIterator *iter;
|
|
|
|
if (type == GIMP_DODGE_BURN_TYPE_BURN)
|
|
exposure = -exposure;
|
|
|
|
iter = gegl_buffer_iterator_new (src_buffer, src_rect, 0,
|
|
babl_format ("R'G'B'A float"),
|
|
GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
|
|
|
|
gegl_buffer_iterator_add (iter, dest_buffer, dest_rect, 0,
|
|
babl_format ("R'G'B'A float"),
|
|
GEGL_ACCESS_WRITE, GEGL_ABYSS_NONE);
|
|
|
|
switch (mode)
|
|
{
|
|
gfloat factor;
|
|
|
|
case GIMP_TRANSFER_HIGHLIGHTS:
|
|
factor = 1.0 + exposure * (0.333333);
|
|
|
|
while (gegl_buffer_iterator_next (iter))
|
|
{
|
|
gfloat *src = iter->data[0];
|
|
gfloat *dest = iter->data[1];
|
|
gint count = iter->length;
|
|
|
|
while (count--)
|
|
{
|
|
*dest++ = *src++ * factor;
|
|
*dest++ = *src++ * factor;
|
|
*dest++ = *src++ * factor;
|
|
|
|
*dest++ = *src++;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case GIMP_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 = iter->data[0];
|
|
gfloat *dest = iter->data[1];
|
|
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 GIMP_TRANSFER_SHADOWS:
|
|
if (exposure >= 0)
|
|
factor = 0.333333 * exposure;
|
|
else
|
|
factor = -0.333333 * exposure;
|
|
|
|
while (gegl_buffer_iterator_next (iter))
|
|
{
|
|
gfloat *src = iter->data[0];
|
|
gfloat *dest = iter->data[1];
|
|
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 gimp_gegl_smudge_with_paint_process()
|
|
src and dest can be the same address
|
|
*/
|
|
static inline void
|
|
gimp_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 gimp_gegl_smudge_with_paint() */
|
|
static void
|
|
gimp_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 */
|
|
gimp_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;
|
|
|
|
gimp_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
|
|
gimp_gegl_smudge_with_paint (GeglBuffer *accum_buffer,
|
|
const GeglRectangle *accum_rect,
|
|
GeglBuffer *canvas_buffer,
|
|
const GeglRectangle *canvas_rect,
|
|
const GimpRGB *brush_color,
|
|
GeglBuffer *paint_buffer,
|
|
gboolean no_erasing,
|
|
gdouble flow,
|
|
gdouble rate)
|
|
{
|
|
GeglBufferIterator *iter;
|
|
gfloat brush_color_float[4];
|
|
gfloat brush_a = flow;
|
|
GeglAccessMode paint_buffer_access_mode = (brush_color ?
|
|
GEGL_ACCESS_WRITE :
|
|
GEGL_ACCESS_READWRITE);
|
|
gboolean sse2 = (gimp_cpu_accel_get_support () &
|
|
GIMP_CPU_ACCEL_X86_SSE2);
|
|
|
|
iter = gegl_buffer_iterator_new (accum_buffer, accum_rect, 0,
|
|
babl_format ("RGBA float"),
|
|
GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE);
|
|
|
|
gegl_buffer_iterator_add (iter, canvas_buffer, canvas_rect, 0,
|
|
babl_format ("RGBA float"),
|
|
GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
|
|
|
|
gegl_buffer_iterator_add (iter, paint_buffer, GEGL_RECTANGLE (0, 0, 0, 0), 0,
|
|
babl_format ("RGBA float"),
|
|
paint_buffer_access_mode, GEGL_ABYSS_NONE);
|
|
|
|
/* 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];
|
|
}
|
|
|
|
while (gegl_buffer_iterator_next (iter))
|
|
{
|
|
gfloat *accum = iter->data[0];
|
|
const gfloat *canvas = iter->data[1];
|
|
gfloat *paint = iter->data[2];
|
|
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)
|
|
{
|
|
gimp_gegl_smudge_with_paint_process_sse2 (accum, canvas, paint, count,
|
|
brush_color ? brush_color_float :
|
|
NULL,
|
|
brush_a,
|
|
no_erasing, flow, rate);
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
gimp_gegl_smudge_with_paint_process (accum, canvas, paint, count,
|
|
brush_color ? brush_color_float :
|
|
NULL,
|
|
brush_a,
|
|
no_erasing, flow, rate);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
gimp_gegl_apply_mask (GeglBuffer *mask_buffer,
|
|
const GeglRectangle *mask_rect,
|
|
GeglBuffer *dest_buffer,
|
|
const GeglRectangle *dest_rect,
|
|
gdouble opacity)
|
|
{
|
|
GeglBufferIterator *iter;
|
|
|
|
iter = gegl_buffer_iterator_new (mask_buffer, mask_rect, 0,
|
|
babl_format ("Y float"),
|
|
GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
|
|
|
|
gegl_buffer_iterator_add (iter, dest_buffer, dest_rect, 0,
|
|
babl_format ("RGBA float"),
|
|
GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE);
|
|
|
|
while (gegl_buffer_iterator_next (iter))
|
|
{
|
|
const gfloat *mask = iter->data[0];
|
|
gfloat *dest = iter->data[1];
|
|
gint count = iter->length;
|
|
|
|
while (count--)
|
|
{
|
|
dest[3] *= *mask * opacity;
|
|
|
|
mask += 1;
|
|
dest += 4;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
gimp_gegl_combine_mask (GeglBuffer *mask_buffer,
|
|
const GeglRectangle *mask_rect,
|
|
GeglBuffer *dest_buffer,
|
|
const GeglRectangle *dest_rect,
|
|
gdouble opacity)
|
|
{
|
|
GeglBufferIterator *iter;
|
|
|
|
iter = gegl_buffer_iterator_new (mask_buffer, mask_rect, 0,
|
|
babl_format ("Y float"),
|
|
GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
|
|
|
|
gegl_buffer_iterator_add (iter, dest_buffer, dest_rect, 0,
|
|
babl_format ("Y float"),
|
|
GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE);
|
|
|
|
while (gegl_buffer_iterator_next (iter))
|
|
{
|
|
const gfloat *mask = iter->data[0];
|
|
gfloat *dest = iter->data[1];
|
|
gint count = iter->length;
|
|
|
|
while (count--)
|
|
{
|
|
*dest *= *mask * opacity;
|
|
|
|
mask += 1;
|
|
dest += 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
gimp_gegl_combine_mask_weird (GeglBuffer *mask_buffer,
|
|
const GeglRectangle *mask_rect,
|
|
GeglBuffer *dest_buffer,
|
|
const GeglRectangle *dest_rect,
|
|
gdouble opacity,
|
|
gboolean stipple)
|
|
{
|
|
GeglBufferIterator *iter;
|
|
|
|
iter = gegl_buffer_iterator_new (mask_buffer, mask_rect, 0,
|
|
babl_format ("Y float"),
|
|
GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
|
|
|
|
gegl_buffer_iterator_add (iter, dest_buffer, dest_rect, 0,
|
|
babl_format ("Y float"),
|
|
GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE);
|
|
|
|
while (gegl_buffer_iterator_next (iter))
|
|
{
|
|
const gfloat *mask = iter->data[0];
|
|
gfloat *dest = iter->data[1];
|
|
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
|
|
gimp_gegl_replace (GeglBuffer *top_buffer,
|
|
const GeglRectangle *top_rect,
|
|
GeglBuffer *bottom_buffer,
|
|
const GeglRectangle *bottom_rect,
|
|
GeglBuffer *mask_buffer,
|
|
const GeglRectangle *mask_rect,
|
|
GeglBuffer *dest_buffer,
|
|
const GeglRectangle *dest_rect,
|
|
gdouble opacity,
|
|
const gboolean *affect)
|
|
{
|
|
GeglBufferIterator *iter;
|
|
|
|
iter = gegl_buffer_iterator_new (top_buffer, top_rect, 0,
|
|
babl_format ("RGBA float"),
|
|
GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
|
|
|
|
gegl_buffer_iterator_add (iter, bottom_buffer, bottom_rect, 0,
|
|
babl_format ("RGBA float"),
|
|
GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
|
|
|
|
gegl_buffer_iterator_add (iter, mask_buffer, mask_rect, 0,
|
|
babl_format ("Y float"),
|
|
GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
|
|
|
|
gegl_buffer_iterator_add (iter, dest_buffer, dest_rect, 0,
|
|
babl_format ("RGBA float"),
|
|
GEGL_ACCESS_WRITE, GEGL_ABYSS_NONE);
|
|
|
|
while (gegl_buffer_iterator_next (iter))
|
|
{
|
|
const gfloat *top = iter->data[0];
|
|
const gfloat *bottom = iter->data[1];
|
|
const gfloat *mask = iter->data[2];
|
|
gfloat *dest = iter->data[3];
|
|
gint count = iter->length;
|
|
|
|
while (count--)
|
|
{
|
|
gint b;
|
|
gdouble mask_val = *mask * opacity;
|
|
|
|
/* calculate new alpha first. */
|
|
gfloat s1_a = bottom[3];
|
|
gfloat s2_a = top[3];
|
|
gdouble a_val = s1_a + mask_val * (s2_a - s1_a);
|
|
|
|
if (a_val == 0.0)
|
|
{
|
|
/* In any case, write out versions of the blending
|
|
* function that result when combinations of s1_a, s2_a,
|
|
* and mask_val --> 0 (or mask_val -->1)
|
|
*/
|
|
|
|
/* 1: s1_a, s2_a, AND mask_val all approach 0+: */
|
|
/* 2: s1_a AND s2_a both approach 0+, regardless of mask_val: */
|
|
if (s1_a + s2_a == 0.0)
|
|
{
|
|
for (b = 0; b < 3; b++)
|
|
{
|
|
gfloat new_val;
|
|
|
|
new_val = bottom[b] + mask_val * (top[b] - bottom[b]);
|
|
|
|
dest[b] = affect[b] ? new_val : bottom[b];
|
|
}
|
|
}
|
|
|
|
/* 3: mask_val AND s1_a both approach 0+, regardless of s2_a */
|
|
else if (s1_a + mask_val == 0.0)
|
|
{
|
|
for (b = 0; b < 3; b++)
|
|
dest[b] = bottom[b];
|
|
}
|
|
|
|
/* 4: mask_val -->1 AND s2_a -->0, regardless of s1_a */
|
|
else if (1.0 - mask_val + s2_a == 0.0)
|
|
{
|
|
for (b = 0; b < 3; b++)
|
|
dest[b] = affect[b] ? top[b] : bottom[b];
|
|
}
|
|
}
|
|
else
|
|
{
|
|
gdouble a_recip = 1.0 / a_val;
|
|
|
|
/* possible optimization: fold a_recip into s1_a and s2_a */
|
|
for (b = 0; b < 3; b++)
|
|
{
|
|
gfloat new_val = a_recip * (bottom[b] * s1_a + mask_val *
|
|
(top[b] * s2_a - bottom[b] * s1_a));
|
|
dest[b] = affect[b] ? new_val : bottom[b];
|
|
}
|
|
}
|
|
|
|
dest[3] = affect[3] ? a_val : s1_a;
|
|
|
|
top += 4;
|
|
bottom += 4;
|
|
mask += 1;
|
|
dest += 4;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
gimp_gegl_index_to_mask (GeglBuffer *indexed_buffer,
|
|
const GeglRectangle *indexed_rect,
|
|
const Babl *indexed_format,
|
|
GeglBuffer *mask_buffer,
|
|
const GeglRectangle *mask_rect,
|
|
gint index)
|
|
{
|
|
GeglBufferIterator *iter;
|
|
|
|
iter = gegl_buffer_iterator_new (indexed_buffer, indexed_rect, 0,
|
|
indexed_format,
|
|
GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
|
|
|
|
gegl_buffer_iterator_add (iter, mask_buffer, mask_rect, 0,
|
|
babl_format ("Y float"),
|
|
GEGL_ACCESS_WRITE, GEGL_ABYSS_NONE);
|
|
|
|
while (gegl_buffer_iterator_next (iter))
|
|
{
|
|
const guchar *indexed = iter->data[0];
|
|
gfloat *mask = iter->data[1];
|
|
gint count = iter->length;
|
|
|
|
while (count--)
|
|
{
|
|
if (*indexed == index)
|
|
*mask = 1.0;
|
|
else
|
|
*mask = 0.0;
|
|
|
|
indexed++;
|
|
mask++;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
gimp_gegl_convert_color_profile (GeglBuffer *src_buffer,
|
|
const GeglRectangle *src_rect,
|
|
GimpColorProfile *src_profile,
|
|
GeglBuffer *dest_buffer,
|
|
const GeglRectangle *dest_rect,
|
|
GimpColorProfile *dest_profile,
|
|
GimpColorRenderingIntent intent,
|
|
gboolean bpc,
|
|
GimpProgress *progress)
|
|
{
|
|
GimpColorTransform *transform;
|
|
GimpColorTransformFlags flags = 0;
|
|
const Babl *src_format;
|
|
const Babl *dest_format;
|
|
|
|
src_format = gegl_buffer_get_format (src_buffer);
|
|
dest_format = gegl_buffer_get_format (dest_buffer);
|
|
|
|
if (bpc)
|
|
flags |= GIMP_COLOR_TRANSFORM_FLAGS_BLACK_POINT_COMPENSATION;
|
|
|
|
flags |= GIMP_COLOR_TRANSFORM_FLAGS_NOOPTIMIZE;
|
|
|
|
transform = gimp_color_transform_new (src_profile, src_format,
|
|
dest_profile, dest_format,
|
|
intent, flags);
|
|
|
|
if (transform)
|
|
{
|
|
if (progress)
|
|
g_signal_connect_swapped (transform, "progress",
|
|
G_CALLBACK (gimp_progress_set_value),
|
|
progress);
|
|
|
|
GIMP_TIMER_START ();
|
|
|
|
gimp_color_transform_process_buffer (transform,
|
|
src_buffer, src_rect,
|
|
dest_buffer, dest_rect);
|
|
|
|
GIMP_TIMER_END ("converting buffer");
|
|
|
|
g_object_unref (transform);
|
|
}
|
|
else
|
|
{
|
|
gegl_buffer_copy (src_buffer, src_rect, GEGL_ABYSS_NONE,
|
|
dest_buffer, dest_rect);
|
|
|
|
if (progress)
|
|
gimp_progress_set_value (progress, 1.0);
|
|
}
|
|
}
|