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gimp/app/operations/layer-modes/gimpoperationlayermode.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpoperationlayermode.c
* Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
* Copyright (C) 2008 Martin Nordholts <martinn@svn.gnome.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 <gegl-plugin.h>
#include <cairo.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpbase/gimpbase.h"
#include "libgimpmath/gimpmath.h"
#include "../operations-types.h"
#include "gimpoperationlayermode.h"
enum
{
PROP_0,
PROP_LAYER_MODE,
PROP_LINEAR,
PROP_OPACITY,
PROP_BLEND_SPACE,
PROP_COMPOSITE_SPACE,
PROP_COMPOSITE_MODE
};
static void gimp_operation_layer_mode_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_operation_layer_mode_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_operation_layer_mode_prepare (GeglOperation *operation);
static gboolean gimp_operation_layer_mode_process (GeglOperation *operation,
GeglOperationContext *context,
const gchar *output_prop,
const GeglRectangle *result,
gint level);
G_DEFINE_TYPE (GimpOperationLayerMode, gimp_operation_layer_mode,
GEGL_TYPE_OPERATION_POINT_COMPOSER3)
#define parent_class gimp_operation_layer_mode_parent_class
const Babl *_gimp_fish_rgba_to_perceptual = NULL;
const Babl *_gimp_fish_perceptual_to_rgba = NULL;
const Babl *_gimp_fish_perceptual_to_laba = NULL;
const Babl *_gimp_fish_rgba_to_laba = NULL;
const Babl *_gimp_fish_laba_to_rgba = NULL;
const Babl *_gimp_fish_laba_to_perceptual = NULL;
typedef void (*CompFun)(gfloat *in,
gfloat *layer,
gfloat *comp,
gfloat *mask,
float opacity,
gfloat *out,
gint samples);
static inline void compfun_src_atop (gfloat *in,
gfloat *layer,
gfloat *comp,
gfloat *mask,
gfloat opacity,
gfloat *out,
gint samples);
static inline void compfun_dst_atop (gfloat *in,
gfloat *layer,
gfloat *comp,
gfloat *mask,
gfloat opacity,
gfloat *out,
gint samples);
static inline void compfun_src_in (gfloat *in,
gfloat *layer,
gfloat *comp,
gfloat *mask,
gfloat opacity,
gfloat *out,
gint samples);
static inline void compfun_src_over (gfloat *in,
gfloat *layer,
gfloat *comp,
gfloat *mask,
gfloat opacity,
gfloat *out,
gint samples);
static CompFun compfun_src_atop_dispatch = compfun_src_atop;
static CompFun compfun_dst_atop_dispatch = compfun_dst_atop;
static CompFun compfun_src_in_dispatch = compfun_src_in;
static CompFun compfun_src_over_dispatch = compfun_src_over;
#if COMPILE_SSE2_INTRINISICS
static inline void compfun_src_atop_sse2 (gfloat *in,
gfloat *layer,
gfloat *comp,
gfloat *mask,
gfloat opacity,
gfloat *out,
gint samples);
#endif
static void
gimp_operation_layer_mode_class_init (GimpOperationLayerModeClass *klass)
{
GObjectClass *object_class;
GeglOperationClass *operation_class;
GeglOperationPointComposer3Class *point_composer3_class;
#if COMPILE_SSE2_INTRINISICS
if (gimp_cpu_accel_get_support () & GIMP_CPU_ACCEL_X86_SSE2)
compfun_src_atop_dispatch = compfun_src_atop_sse2;
#endif
object_class = G_OBJECT_CLASS (klass);
operation_class = GEGL_OPERATION_CLASS (klass);
point_composer3_class = GEGL_OPERATION_POINT_COMPOSER3_CLASS (klass);
gegl_operation_class_set_keys (operation_class,
"name", "gimp:layer-mode", NULL);
object_class->set_property = gimp_operation_layer_mode_set_property;
object_class->get_property = gimp_operation_layer_mode_get_property;
operation_class->prepare = gimp_operation_layer_mode_prepare;
operation_class->process = gimp_operation_layer_mode_process;
point_composer3_class->process = gimp_operation_layer_mode_process_pixels;
g_object_class_install_property (object_class, PROP_LAYER_MODE,
g_param_spec_enum ("layer-mode",
NULL, NULL,
GIMP_TYPE_LAYER_MODE,
GIMP_LAYER_MODE_NORMAL,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_LINEAR,
g_param_spec_boolean ("linear",
NULL, NULL,
FALSE,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_OPACITY,
g_param_spec_double ("opacity",
NULL, NULL,
0.0, 1.0, 1.0,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_BLEND_SPACE,
g_param_spec_enum ("blend-space",
NULL, NULL,
GIMP_TYPE_LAYER_COLOR_SPACE,
GIMP_LAYER_COLOR_SPACE_RGB_LINEAR,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_COMPOSITE_SPACE,
g_param_spec_enum ("composite-space",
NULL, NULL,
GIMP_TYPE_LAYER_COLOR_SPACE,
GIMP_LAYER_COLOR_SPACE_RGB_LINEAR,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_COMPOSITE_MODE,
g_param_spec_enum ("composite-mode",
NULL, NULL,
GIMP_TYPE_LAYER_COMPOSITE_MODE,
GIMP_LAYER_COMPOSITE_SRC_OVER,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
_gimp_fish_rgba_to_perceptual = babl_fish ("RGBA float", "R'G'B'A float");
_gimp_fish_perceptual_to_rgba = babl_fish ("R'G'B'A float", "RGBA float");
_gimp_fish_perceptual_to_laba = babl_fish ("R'G'B'A float", "CIE Lab alpha float");
_gimp_fish_rgba_to_laba = babl_fish ("RGBA float", "CIE Lab alpha float");
_gimp_fish_laba_to_rgba = babl_fish ("CIE Lab alpha float", "RGBA float");
_gimp_fish_laba_to_perceptual = babl_fish ("CIE Lab alpha float", "R'G'B'A float");
}
static void
gimp_operation_layer_mode_init (GimpOperationLayerMode *self)
{
}
static void
gimp_operation_layer_mode_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpOperationLayerMode *self = GIMP_OPERATION_LAYER_MODE (object);
switch (property_id)
{
case PROP_LAYER_MODE:
self->layer_mode = g_value_get_enum (value);
break;
case PROP_LINEAR:
self->linear = g_value_get_boolean (value);
break;
case PROP_OPACITY:
self->opacity = g_value_get_double (value);
break;
case PROP_BLEND_SPACE:
self->blend_space = g_value_get_enum (value);
break;
case PROP_COMPOSITE_SPACE:
self->composite_space = g_value_get_enum (value);
break;
case PROP_COMPOSITE_MODE:
self->composite_mode = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_operation_layer_mode_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpOperationLayerMode *self = GIMP_OPERATION_LAYER_MODE (object);
switch (property_id)
{
case PROP_LAYER_MODE:
g_value_set_enum (value, self->layer_mode);
break;
case PROP_LINEAR:
g_value_set_boolean (value, self->linear);
break;
case PROP_OPACITY:
g_value_set_double (value, self->opacity);
break;
case PROP_BLEND_SPACE:
g_value_set_enum (value, self->blend_space);
break;
case PROP_COMPOSITE_SPACE:
g_value_set_enum (value, self->composite_space);
break;
case PROP_COMPOSITE_MODE:
g_value_set_enum (value, self->composite_mode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_operation_layer_mode_prepare (GeglOperation *operation)
{
GimpOperationLayerMode *self = GIMP_OPERATION_LAYER_MODE (operation);
const Babl *format;
if (self->linear)
format = babl_format ("RGBA float");
else
format = babl_format ("R'G'B'A float");
gegl_operation_set_format (operation, "input", format);
gegl_operation_set_format (operation, "output", format);
gegl_operation_set_format (operation, "aux", format);
gegl_operation_set_format (operation, "aux2", babl_format ("Y float"));
}
static gboolean
gimp_operation_layer_mode_process (GeglOperation *operation,
GeglOperationContext *context,
const gchar *output_prop,
const GeglRectangle *result,
gint level)
{
GimpOperationLayerMode *point = GIMP_OPERATION_LAYER_MODE (operation);
if (point->opacity == 0.0 ||
! gegl_operation_context_get_object (context, "aux"))
{
GObject *input;
/* get the raw values, this does not increase the reference count */
input = gegl_operation_context_get_object (context, "input");
if (input)
{
gegl_operation_context_set_object (context, "output", input);
return TRUE;
}
}
/* chain up, which will create the needed buffers for our actual
* process function
*/
return GEGL_OPERATION_CLASS (parent_class)->process (operation, context,
output_prop, result,
level);
}
static inline GimpBlendFunc gimp_layer_mode_get_blend_fun (GimpLayerMode mode);
static inline void gimp_composite_blend (gpointer op,
gfloat *in,
gfloat *layer,
gfloat *mask,
gfloat *out,
glong samples,
GimpBlendFunc blend_func);
gboolean
gimp_operation_layer_mode_process_pixels (GeglOperation *operation,
void *in,
void *layer,
void *mask,
void *out,
glong samples,
const GeglRectangle *roi,
gint level)
{
GimpOperationLayerMode *layer_mode = (GimpOperationLayerMode*)(operation);
gimp_composite_blend (operation, in, layer, mask, out, samples,
gimp_layer_mode_get_blend_fun (layer_mode->layer_mode));
return TRUE;
}
static inline void
compfun_src_atop (gfloat *in,
gfloat *layer,
gfloat *comp,
gfloat *mask,
gfloat opacity,
gfloat *out,
gint samples)
{
while (samples--)
{
gfloat layer_alpha = layer[ALPHA] * opacity;
if (mask)
layer_alpha *= *mask;
if (layer_alpha == 0.0f)
{
out[RED] = in[RED];
out[GREEN] = in[GREEN];
out[BLUE] = in[BLUE];
}
else
{
gint b;
for (b = RED; b < ALPHA; b++)
out[b] = layer[b] * layer_alpha + in[b] * (1.0f - layer_alpha);
}
out[ALPHA] = in[ALPHA];
in += 4;
out += 4;
layer += 4;
if (mask)
mask++;
}
}
static inline void
compfun_src_over (gfloat *in,
gfloat *layer,
gfloat *comp,
gfloat *mask,
gfloat opacity,
gfloat *out,
gint samples)
{
while (samples--)
{
gfloat new_alpha;
gfloat layer_alpha = layer[ALPHA] * opacity;
if (mask)
layer_alpha *= *mask;
new_alpha = layer_alpha + (1.0f - layer_alpha) * in[ALPHA];
if (layer_alpha == 0.0f || new_alpha == 0.0f)
{
out[RED] = in[RED];
out[GREEN] = in[GREEN];
out[BLUE] = in[BLUE];
}
else
{
gfloat ratio = layer_alpha / new_alpha;
gint b;
for (b = RED; b < ALPHA; b++)
out[b] = ratio * (in[ALPHA] * (comp[b] - layer[b]) + layer[b] - in[b]) + in[b];
}
out[ALPHA] = new_alpha;
in += 4;
layer += 4;
comp += 4;
out += 4;
if (mask)
mask++;
}
}
static inline void
compfun_dst_atop (gfloat *in,
gfloat *layer,
gfloat *comp,
gfloat *mask,
gfloat opacity,
gfloat *out,
gint samples)
{
while (samples--)
{
gfloat layer_alpha = layer[ALPHA] * opacity;
if (mask)
layer_alpha *= *mask;
if (layer_alpha == 0.0f)
{
out[RED] = in[RED];
out[GREEN] = in[GREEN];
out[BLUE] = in[BLUE];
}
else
{
gint b;
for (b = RED; b < ALPHA; b++)
out[b] = comp[b] * in[ALPHA] + layer[b] * (1.0f - in[ALPHA]);
}
out[ALPHA] = layer_alpha;
in += 4;
layer += 4;
comp += 4;
out += 4;
if (mask)
mask++;
}
}
static inline void
compfun_src_in (gfloat *in,
gfloat *layer,
gfloat *comp,
gfloat *mask,
gfloat opacity,
gfloat *out,
gint samples)
{
while (samples--)
{
gfloat new_alpha = in[ALPHA] * layer[ALPHA] * opacity;
if (mask)
new_alpha *= *mask;
if (new_alpha == 0.0f)
{
out[RED] = in[RED];
out[GREEN] = in[GREEN];
out[BLUE] = in[BLUE];
}
else
{
out[RED] = layer[RED];
out[GREEN] = layer[GREEN];
out[BLUE] = layer[BLUE];
}
out[ALPHA] = new_alpha;
in += 4;
out += 4;
layer += 4;
if (mask)
mask++;
}
}
#if COMPILE_SSE2_INTRINISICS
#include <emmintrin.h>
static inline void
compfun_src_atop_sse2 (gfloat *in,
gfloat *layer,
gfloat *comp,
gfloat *mask,
gfloat opacity,
gfloat *out,
gint samples)
{
if ((((uintptr_t)in) | /* alignment check */
((uintptr_t)mask) |
((uintptr_t)comp) |
((uintptr_t)layer) |
((uintptr_t)out) ) & 0x0F)
{
return compfun_src_atop (in, layer, comp, mask, opacity, out, samples);
}
else
{
const __v4sf *v_in = (const __v4sf*) in;
const __v4sf *v_layer = (const __v4sf*) layer;
__v4sf *v_out = (__v4sf*) out;
const __v4sf v_one = _mm_set1_ps (1.0f);
const __v4sf v_opacity = _mm_set1_ps (opacity);
while (samples--)
{
__v4sf alpha, rgba_in, rgba_layer;
rgba_in = *v_in ++;
rgba_layer = *v_layer++;
alpha = (__v4sf)_mm_shuffle_epi32((__m128i)rgba_layer,_MM_SHUFFLE(3,3,3,3)) * v_opacity;
if (mask)
{
alpha = alpha * _mm_set1_ps (*mask++);
}
if (_mm_ucomigt_ss (alpha, _mm_setzero_ps ()))
{
__v4sf out_pixel, out_pixel_rbaa, out_alpha;
out_alpha = (__v4sf)_mm_shuffle_epi32((__m128i)rgba_in,_MM_SHUFFLE(3,3,3,3));
out_pixel = rgba_layer * alpha + rgba_in * (v_one - alpha);
out_pixel_rbaa = _mm_shuffle_ps (out_pixel, out_alpha, _MM_SHUFFLE (3, 3, 2, 0));
out_pixel = _mm_shuffle_ps (out_pixel, out_pixel_rbaa, _MM_SHUFFLE (2, 1, 1, 0));
*v_out++ = out_pixel;
}
else
{
*v_out ++ = rgba_in;
}
}
}
}
#endif
static inline void
gimp_composite_blend (gpointer op,
gfloat *in,
gfloat *layer,
gfloat *mask,
gfloat *out,
glong samples,
GimpBlendFunc blend_func)
{
GimpOperationLayerMode *layer_mode = op;
gfloat opacity = layer_mode->opacity;
GimpLayerColorSpace blend_space = layer_mode->blend_space;
GimpLayerColorSpace composite_space= layer_mode->composite_space;
GimpLayerCompositeMode composite_mode = layer_mode->composite_mode;
gfloat *blend_in = in;
gfloat *blend_layer = layer;
gfloat *blend_out = out;
gfloat *composite_in = NULL;
gfloat *composite_layer = NULL;
gboolean composite_needs_in_color =
composite_mode == GIMP_LAYER_COMPOSITE_SRC_OVER ||
composite_mode == GIMP_LAYER_COMPOSITE_SRC_ATOP;
gboolean composite_needs_layer_color =
composite_mode == GIMP_LAYER_COMPOSITE_SRC_OVER ||
composite_mode == GIMP_LAYER_COMPOSITE_DST_ATOP;
const Babl *fish_to_blend = NULL;
const Babl *fish_to_composite = NULL;
const Babl *fish_from_composite = NULL;
switch (blend_space)
{
default:
case GIMP_LAYER_COLOR_SPACE_RGB_LINEAR:
fish_to_blend = NULL;
switch (composite_space)
{
case GIMP_LAYER_COLOR_SPACE_LAB:
fish_to_composite = _gimp_fish_rgba_to_laba;
fish_from_composite = _gimp_fish_laba_to_rgba;
break;
default:
case GIMP_LAYER_COLOR_SPACE_RGB_LINEAR:
fish_to_composite = NULL;
fish_from_composite = NULL;
break;
case GIMP_LAYER_COLOR_SPACE_RGB_PERCEPTUAL:
fish_to_composite = _gimp_fish_rgba_to_perceptual;
fish_from_composite = _gimp_fish_perceptual_to_rgba;
break;
}
break;
case GIMP_LAYER_COLOR_SPACE_LAB:
fish_to_blend = _gimp_fish_rgba_to_laba;
switch (composite_space)
{
case GIMP_LAYER_COLOR_SPACE_LAB:
default:
fish_to_composite = NULL;
fish_from_composite = _gimp_fish_laba_to_rgba;
break;
case GIMP_LAYER_COLOR_SPACE_RGB_LINEAR:
fish_to_composite = _gimp_fish_laba_to_rgba;
fish_from_composite = NULL;
break;
case GIMP_LAYER_COLOR_SPACE_RGB_PERCEPTUAL:
fish_to_composite = _gimp_fish_laba_to_perceptual;
fish_from_composite = _gimp_fish_perceptual_to_rgba;
break;
}
break;
case GIMP_LAYER_COLOR_SPACE_RGB_PERCEPTUAL:
fish_to_blend = _gimp_fish_rgba_to_perceptual;
switch (composite_space)
{
case GIMP_LAYER_COLOR_SPACE_LAB:
default:
fish_to_composite = _gimp_fish_perceptual_to_laba;
fish_from_composite = NULL;
break;
case GIMP_LAYER_COLOR_SPACE_RGB_LINEAR:
fish_to_composite = _gimp_fish_perceptual_to_rgba;
fish_from_composite = NULL;
break;
case GIMP_LAYER_COLOR_SPACE_RGB_PERCEPTUAL:
fish_to_composite = NULL;
fish_from_composite = _gimp_fish_perceptual_to_rgba;
break;
}
break;
}
if (in == out) /* in-place detected, avoid clobbering since we need to
read it for the compositing stage */
blend_out = g_alloca (sizeof (gfloat) * 4 * samples);
if (fish_to_blend)
{
if (in != out || (composite_needs_in_color &&
composite_space == GIMP_LAYER_COLOR_SPACE_RGB_LINEAR))
{
/* don't convert input in-place if we're not doing in-place output,
* or if we're going to need the original input for compositing.
*/
blend_in = g_alloca (sizeof (gfloat) * 4 * samples);
}
blend_layer = g_alloca (sizeof (gfloat) * 4 * samples);
babl_process (fish_to_blend, in, blend_in, samples);
babl_process (fish_to_blend, layer, blend_layer, samples);
}
blend_func (blend_in, blend_layer, blend_out, samples);
composite_in = blend_in;
composite_layer = blend_layer;
if (fish_to_composite)
{
if (composite_space == GIMP_LAYER_COLOR_SPACE_RGB_LINEAR)
{
composite_in = in;
composite_layer = layer;
}
else
{
if (composite_needs_in_color)
{
if (composite_in == in && in != out)
composite_in = g_alloca (sizeof (gfloat) * 4 * samples);
babl_process (fish_to_composite,
blend_in, composite_in, samples);
}
if (composite_needs_layer_color)
{
if (composite_layer == layer)
composite_layer = g_alloca (sizeof (gfloat) * 4 * samples);
babl_process (fish_to_composite,
blend_layer, composite_layer, samples);
}
}
babl_process (fish_to_composite, blend_out, blend_out, samples);
}
switch (composite_mode)
{
case GIMP_LAYER_COMPOSITE_SRC_ATOP:
default:
compfun_src_atop_dispatch (composite_in, blend_out, NULL, mask, opacity, out, samples);
break;
case GIMP_LAYER_COMPOSITE_SRC_OVER:
compfun_src_over_dispatch (composite_in, composite_layer, blend_out, mask, opacity, out, samples);
break;
case GIMP_LAYER_COMPOSITE_DST_ATOP:
compfun_dst_atop_dispatch (composite_in, composite_layer, blend_out, mask, opacity, out, samples);
break;
case GIMP_LAYER_COMPOSITE_SRC_IN:
compfun_src_in_dispatch (composite_in, blend_out, NULL, mask, opacity, out, samples);
break;
}
if (fish_from_composite)
{
babl_process (fish_from_composite, out, out, samples);
}
}
static inline void
blendfun_screen (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
out[c] = 1.0f - (1.0f - dest[c]) * (1.0f - src[c]);
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void /* aka linear_dodge */
blendfun_addition (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
out[c] = dest[c] + src[c];
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_linear_burn (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
out[c] = dest[c] + src[c] - 1.0f;
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_subtract (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
out[c] = dest[c] - src[c];
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_multiply (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
out[c] = dest[c] * src[c];
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_normal (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
out[c] = src[c];
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_burn (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
{
gfloat comp = 1.0f - (1.0f - dest[c]) / src[c];
/* The CLAMP macro is deliberately inlined and written
* to map comp == NAN (0 / 0) -> 1
*/
out[c] = comp < 0 ? 0.0f : comp < 1.0f ? comp : 1.0f;
}
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_darken_only (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
out[c] = MIN (dest[c], src[c]);
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_luminance_lighten_only (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
float dest_luminance =
GIMP_RGB_LUMINANCE(dest[0], dest[1], dest[2]);
float src_luminance =
GIMP_RGB_LUMINANCE(src[0], src[1], src[2]);
if (dest_luminance >= src_luminance)
for (c = 0; c < 3; c++)
out[c] = dest[c];
else
for (c = 0; c < 3; c++)
out[c] = src[c];
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_luminance_darken_only (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
float dest_luminance =
GIMP_RGB_LUMINANCE(dest[0], dest[1], dest[2]);
float src_luminance =
GIMP_RGB_LUMINANCE(src[0], src[1], src[2]);
if (dest_luminance <= src_luminance)
for (c = 0; c < 3; c++)
out[c] = dest[c];
else
for (c = 0; c < 3; c++)
out[c] = src[c];
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_lighten_only (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
out[c] = MAX (dest[c], src[c]);
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_difference (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
{
out[c] = dest[c] - src[c];
if (out[c] < 0)
out[c] = -out[c];
}
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_divide (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
{
gfloat comp = dest[c] / src[c];
/* make infinities(or NaN) correspond to a high number,
* to get more predictable math, ideally higher than 5.0
* but it seems like some babl conversions might be
* acting up then
*/
if (!(comp > -42949672.0f && comp < 5.0f))
comp = 5.0f;
out[c] = comp;
}
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_dodge (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
{
gfloat comp = dest[c] / (1.0f - src[c]);
comp = MIN (comp, 1.0f);
out[c] = comp;
}
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_grain_extract (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
out[c] = dest[c] - src[c] + 0.5f;
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_grain_merge (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
out[c] = dest[c] + src[c] - 0.5f;
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_hardlight (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
{
gfloat comp;
if (src[c] > 0.5f)
{
comp = (1.0f - dest[c]) * (1.0f - (src[c] - 0.5f) * 2.0f);
comp = MIN (1 - comp, 1);
}
else
{
comp = dest[c] * (src[c] * 2.0f);
comp = MIN (comp, 1.0f);
}
out[c] = comp;
}
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_softlight (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
{
gfloat multiply = dest[c] * src[c];
gfloat screen = 1.0f - (1.0f - dest[c]) * (1.0f - src[c]);
gfloat comp = (1.0f - dest[c]) * multiply + dest[c] * screen;
out[c] = comp;
}
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_overlay (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
{
gfloat comp;
if (dest[c] < 0.5f)
{
comp = 2.0f * dest[c] * src[c];
}
else
{
comp = 1.0f - 2.0f * (1.0f - src[c]) * (1.0f - dest[c]);
}
out[c] = comp;
}
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_hsv_color (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
GimpRGB dest_rgb = { dest[0], dest[1], dest[2] };
GimpRGB src_rgb = { src[0], src[1], src[2] };
GimpHSL src_hsl, dest_hsl;
gimp_rgb_to_hsl (&dest_rgb, &dest_hsl);
gimp_rgb_to_hsl (&src_rgb, &src_hsl);
dest_hsl.h = src_hsl.h;
dest_hsl.s = src_hsl.s;
gimp_hsl_to_rgb (&dest_hsl, &dest_rgb);
out[RED] = dest_rgb.r;
out[GREEN] = dest_rgb.g;
out[BLUE] = dest_rgb.b;
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_hsv_hue (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
GimpRGB dest_rgb = { dest[0], dest[1], dest[2] };
GimpRGB src_rgb = { src[0], src[1], src[2] };
GimpHSV src_hsv, dest_hsv;
gimp_rgb_to_hsv (&dest_rgb, &dest_hsv);
gimp_rgb_to_hsv (&src_rgb, &src_hsv);
dest_hsv.h = src_hsv.h;
gimp_hsv_to_rgb (&dest_hsv, &dest_rgb);
out[RED] = dest_rgb.r;
out[GREEN] = dest_rgb.g;
out[BLUE] = dest_rgb.b;
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_hsv_saturation (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
GimpRGB dest_rgb = { dest[0], dest[1], dest[2] };
GimpRGB src_rgb = { src[0], src[1], src[2] };
GimpHSV src_hsv, dest_hsv;
gimp_rgb_to_hsv (&dest_rgb, &dest_hsv);
gimp_rgb_to_hsv (&src_rgb, &src_hsv);
dest_hsv.s = src_hsv.s;
gimp_hsv_to_rgb (&dest_hsv, &dest_rgb);
out[RED] = dest_rgb.r;
out[GREEN] = dest_rgb.g;
out[BLUE] = dest_rgb.b;
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_hsv_value (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
GimpRGB dest_rgb = { dest[0], dest[1], dest[2] };
GimpRGB src_rgb = { src[0], src[1], src[2] };
GimpHSV src_hsv, dest_hsv;
gimp_rgb_to_hsv (&dest_rgb, &dest_hsv);
gimp_rgb_to_hsv (&src_rgb, &src_hsv);
dest_hsv.v = src_hsv.v;
gimp_hsv_to_rgb (&dest_hsv, &dest_rgb);
out[RED] = dest_rgb.r;
out[GREEN] = dest_rgb.g;
out[BLUE] = dest_rgb.b;
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_lch_chroma (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gfloat A1 = dest[1];
gfloat B1 = dest[2];
gfloat c1 = hypotf (A1, B1);
if (c1 != 0.0f)
{
gfloat A2 = src[1];
gfloat B2 = src[2];
gfloat c2 = hypotf (A2, B2);
gfloat A = c2 * A1 / c1;
gfloat B = c2 * B1 / c1;
out[0] = dest[0];
out[1] = A;
out[2] = B;
}
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_lch_color (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
out[0] = dest[0];
out[1] = src[1];
out[2] = src[2];
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_lch_hue (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gfloat A2 = src[1];
gfloat B2 = src[2];
gfloat c2 = hypotf (A2, B2);
if (c2 > 0.1f)
{
gfloat A1 = dest[1];
gfloat B1 = dest[2];
gfloat c1 = hypotf (A1, B1);
gfloat A = c1 * A2 / c2;
gfloat B = c1 * B2 / c2;
out[0] = dest[0];
out[1] = A;
out[2] = B;
}
else
{
out[0] = dest[0];
out[1] = dest[1];
out[2] = dest[2];
}
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_lch_lightness (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
out[0] = src[0];
out[1] = dest[1];
out[2] = dest[2];
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_copy (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
gint c;
for (c = 0; c < 4; c++)
out[c] = src[c];
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
/* added according to:
http://www.deepskycolors.com/archivo/2010/04/21/formulas-for-Photoshop-blending-modes.html */
static inline void
blendfun_vivid_light (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
{
gfloat comp;
if (src[c] > 0.5f)
{
comp = (1.0f - (1.0f - dest[c]) / (2.0f * (src[c])));
}
else
{
comp = dest[c] / (1.0f - 2.0f * (src[c] - 0.5));
}
comp = MIN (comp, 1.0f);
out[c] = comp;
}
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
/* added according to:
http://www.deepskycolors.com/archivo/2010/04/21/formulas-for-Photoshop-blending-modes.html */
static inline void
blendfun_linear_light (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
{
gfloat comp;
if (src[c] > 0.5f)
{
comp = dest[c] + 2.0 * (src[c] - 0.5);
}
else
{
comp = dest[c] + 2.0 * src[c] - 1.0;
}
out[c] = comp;
}
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
/* added according to:
http://www.deepskycolors.com/archivo/2010/04/21/formulas-for-Photoshop-blending-modes.html */
static inline void
blendfun_pin_light (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
{
gfloat comp;
if (src[c] > 0.5f)
{
comp = MAX(dest[c], 2 * (src[c] - 0.5));
}
else
{
comp = MIN(dest[c], 2 * src[c]);
}
out[c] = comp;
}
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void
blendfun_exclusion (const float *dest,
const float *src,
float *out,
int samples)
{
while (samples--)
{
if (dest[ALPHA] != 0.0f && src[ALPHA] != 0.0f)
{
gint c;
for (c = 0; c < 3; c++)
{
out[c] = 0.5f - 2.0f * (dest[c] - 0.5f) * (src[c] - 0.5f);
}
}
out[ALPHA] = src[ALPHA];
out += 4;
src += 4;
dest += 4;
}
}
static inline void dummy_fun(void)
{
}
static inline GimpBlendFunc gimp_layer_mode_get_blend_fun (GimpLayerMode mode)
{
switch (mode)
{
case GIMP_LAYER_MODE_SCREEN_LINEAR:
case GIMP_LAYER_MODE_SCREEN: return blendfun_screen;
case GIMP_LAYER_MODE_ADDITION_LINEAR:
case GIMP_LAYER_MODE_ADDITION: return blendfun_addition;
case GIMP_LAYER_MODE_SUBTRACT_LINEAR:
case GIMP_LAYER_MODE_SUBTRACT: return blendfun_subtract;
case GIMP_LAYER_MODE_MULTIPLY_LINEAR:
case GIMP_LAYER_MODE_MULTIPLY: return blendfun_multiply;
case GIMP_LAYER_MODE_NORMAL_LINEAR:
case GIMP_LAYER_MODE_NORMAL: return blendfun_normal;
case GIMP_LAYER_MODE_BURN_LINEAR:
case GIMP_LAYER_MODE_BURN: return blendfun_burn;
case GIMP_LAYER_MODE_GRAIN_MERGE_LINEAR:
case GIMP_LAYER_MODE_GRAIN_MERGE: return blendfun_grain_merge;
case GIMP_LAYER_MODE_GRAIN_EXTRACT_LINEAR:
case GIMP_LAYER_MODE_GRAIN_EXTRACT: return blendfun_grain_extract;
case GIMP_LAYER_MODE_DODGE_LINEAR:
case GIMP_LAYER_MODE_DODGE: return blendfun_dodge;
case GIMP_LAYER_MODE_OVERLAY_LINEAR:
case GIMP_LAYER_MODE_OVERLAY: return blendfun_overlay;
case GIMP_LAYER_MODE_HSV_COLOR: return blendfun_hsv_color;
case GIMP_LAYER_MODE_HSV_HUE: return blendfun_hsv_hue;
case GIMP_LAYER_MODE_HSV_SATURATION: return blendfun_hsv_saturation;
case GIMP_LAYER_MODE_HSV_VALUE: return blendfun_hsv_value;
case GIMP_LAYER_MODE_LCH_CHROMA: return blendfun_lch_chroma;
case GIMP_LAYER_MODE_LCH_COLOR: return blendfun_lch_color;
case GIMP_LAYER_MODE_LCH_HUE: return blendfun_lch_hue;
case GIMP_LAYER_MODE_LCH_LIGHTNESS: return blendfun_lch_lightness;
case GIMP_LAYER_MODE_HARDLIGHT_LINEAR:
case GIMP_LAYER_MODE_HARDLIGHT: return blendfun_hardlight;
case GIMP_LAYER_MODE_SOFTLIGHT_LINEAR:
case GIMP_LAYER_MODE_SOFTLIGHT: return blendfun_softlight;
case GIMP_LAYER_MODE_DIVIDE:
case GIMP_LAYER_MODE_DIVIDE_LINEAR: return blendfun_divide;
case GIMP_LAYER_MODE_DIFFERENCE_LINEAR:
case GIMP_LAYER_MODE_DIFFERENCE: return blendfun_difference;
case GIMP_LAYER_MODE_DARKEN_ONLY: return blendfun_darken_only;
case GIMP_LAYER_MODE_LIGHTEN_ONLY: return blendfun_lighten_only;
case GIMP_LAYER_MODE_LUMINANCE_DARKEN_ONLY:
case GIMP_LAYER_MODE_LUMA_DARKEN_ONLY: return blendfun_luminance_darken_only;
case GIMP_LAYER_MODE_LUMINANCE_LIGHTEN_ONLY:
case GIMP_LAYER_MODE_LUMA_LIGHTEN_ONLY: return blendfun_luminance_lighten_only;
case GIMP_LAYER_MODE_VIVID_LIGHT_LINEAR:
case GIMP_LAYER_MODE_VIVID_LIGHT: return blendfun_vivid_light;
case GIMP_LAYER_MODE_PIN_LIGHT_LINEAR:
case GIMP_LAYER_MODE_PIN_LIGHT: return blendfun_pin_light;
case GIMP_LAYER_MODE_LINEAR_LIGHT_LINEAR:
case GIMP_LAYER_MODE_LINEAR_LIGHT: return blendfun_linear_light;
case GIMP_LAYER_MODE_EXCLUSION_LINEAR:
case GIMP_LAYER_MODE_EXCLUSION: return blendfun_exclusion;
case GIMP_LAYER_MODE_LINEAR_BURN_LINEAR:
case GIMP_LAYER_MODE_LINEAR_BURN: return blendfun_linear_burn;
case GIMP_LAYER_MODE_DISSOLVE:
case GIMP_LAYER_MODE_BEHIND:
case GIMP_LAYER_MODE_BEHIND_LINEAR:
case GIMP_LAYER_MODE_MULTIPLY_LEGACY:
case GIMP_LAYER_MODE_SCREEN_LEGACY:
case GIMP_LAYER_MODE_OVERLAY_LEGACY:
case GIMP_LAYER_MODE_DIFFERENCE_LEGACY:
case GIMP_LAYER_MODE_ADDITION_LEGACY:
case GIMP_LAYER_MODE_SUBTRACT_LEGACY:
case GIMP_LAYER_MODE_DARKEN_ONLY_LEGACY:
case GIMP_LAYER_MODE_LIGHTEN_ONLY_LEGACY:
case GIMP_LAYER_MODE_HSV_HUE_LEGACY:
case GIMP_LAYER_MODE_HSV_SATURATION_LEGACY:
case GIMP_LAYER_MODE_HSV_COLOR_LEGACY:
case GIMP_LAYER_MODE_HSV_VALUE_LEGACY:
case GIMP_LAYER_MODE_DIVIDE_LEGACY:
case GIMP_LAYER_MODE_DODGE_LEGACY:
case GIMP_LAYER_MODE_BURN_LEGACY:
case GIMP_LAYER_MODE_HARDLIGHT_LEGACY:
case GIMP_LAYER_MODE_SOFTLIGHT_LEGACY:
case GIMP_LAYER_MODE_GRAIN_EXTRACT_LEGACY:
case GIMP_LAYER_MODE_GRAIN_MERGE_LEGACY:
case GIMP_LAYER_MODE_COLOR_ERASE:
case GIMP_LAYER_MODE_ERASE:
case GIMP_LAYER_MODE_REPLACE:
case GIMP_LAYER_MODE_ANTI_ERASE:
return (void*)dummy_fun;
}
return (void*)dummy_fun;
}
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