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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 <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl-plugin.h>
#include <cairo.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "libgimpbase/gimpbase.h"
#include "../operations-types.h"
#include "gimp-layer-modes.h"
#include "gimpoperationlayermode.h"
#include "gimpoperationlayermode-composite.h"
/* the maximum number of samples to process in one go. used to limit
* the size of the buffers we allocate on the stack.
*/
#define GIMP_COMPOSITE_BLEND_MAX_SAMPLES ((1 << 18) /* 256 KiB */ / \
16 /* bytes per pixel */ / \
2 /* max number of buffers */)
/* number of consecutive unblended samples (whose source or destination alpha
* is zero) above which to split the blending process, in order to avoid
* performing too many unnecessary conversions.
*/
#define GIMP_COMPOSITE_BLEND_SPLIT_THRESHOLD 32
enum
{
PROP_0,
PROP_LAYER_MODE,
PROP_OPACITY,
PROP_BLEND_SPACE,
PROP_COMPOSITE_SPACE,
PROP_COMPOSITE_MODE
};
typedef void (* CompositeFunc) (const gfloat *in,
const gfloat *layer,
const gfloat *comp,
const gfloat *mask,
float opacity,
gfloat *out,
gint samples);
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 GeglRectangle gimp_operation_layer_mode_get_bounding_box (GeglOperation *operation);
static gboolean gimp_operation_layer_mode_parent_process (GeglOperation *operation,
GeglOperationContext *context,
const gchar *output_prop,
const GeglRectangle *result,
gint level);
static gboolean gimp_operation_layer_mode_process (GeglOperation *operation,
void *in,
void *layer,
void *mask,
void *out,
glong samples,
const GeglRectangle *roi,
gint level);
static gboolean gimp_operation_layer_mode_real_parent_process (GeglOperation *operation,
GeglOperationContext *context,
const gchar *output_prop,
const GeglRectangle *result,
gint level);
static gboolean gimp_operation_layer_mode_real_process (GeglOperation *operation,
void *in,
void *layer,
void *mask,
void *out,
glong samples,
const GeglRectangle *roi,
gint level);
static gboolean process_last_node (GeglOperation *operation,
void *in,
void *layer,
void *mask,
void *out,
glong samples,
const GeglRectangle *roi,
gint level);
static void gimp_operation_layer_mode_cache_fishes (GimpOperationLayerMode *op,
const Babl *preferred_format);
G_DEFINE_TYPE (GimpOperationLayerMode, gimp_operation_layer_mode,
GEGL_TYPE_OPERATION_POINT_COMPOSER3)
#define parent_class gimp_operation_layer_mode_parent_class
static CompositeFunc composite_union = gimp_operation_layer_mode_composite_union;
static CompositeFunc composite_clip_to_backdrop = gimp_operation_layer_mode_composite_clip_to_backdrop;
static CompositeFunc composite_clip_to_layer = gimp_operation_layer_mode_composite_clip_to_layer;
static CompositeFunc composite_intersection = gimp_operation_layer_mode_composite_intersection;
static CompositeFunc composite_union_sub = gimp_operation_layer_mode_composite_union_sub;
static CompositeFunc composite_clip_to_backdrop_sub = gimp_operation_layer_mode_composite_clip_to_backdrop_sub;
static CompositeFunc composite_clip_to_layer_sub = gimp_operation_layer_mode_composite_clip_to_layer_sub;
static CompositeFunc composite_intersection_sub = gimp_operation_layer_mode_composite_intersection_sub;
static void
gimp_operation_layer_mode_class_init (GimpOperationLayerModeClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
GeglOperationPointComposer3Class *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->get_bounding_box = gimp_operation_layer_mode_get_bounding_box;
operation_class->process = gimp_operation_layer_mode_parent_process;
point_composer3_class->process = gimp_operation_layer_mode_process;
klass->parent_process = gimp_operation_layer_mode_real_parent_process;
klass->process = gimp_operation_layer_mode_real_process;
klass->get_affected_region = NULL;
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_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_UNION,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
#if COMPILE_SSE2_INTRINISICS
if (gimp_cpu_accel_get_support () & GIMP_CPU_ACCEL_X86_SSE2)
composite_clip_to_backdrop = gimp_operation_layer_mode_composite_clip_to_backdrop_sse2;
#endif
}
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_OPACITY:
self->prop_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->prop_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_OPACITY:
g_value_set_double (value, self->prop_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->prop_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 GeglRectangle *input_extent;
const GeglRectangle *mask_extent;
const Babl *preferred_format;
const Babl *format;
self->composite_mode = self->prop_composite_mode;
if (self->composite_mode == GIMP_LAYER_COMPOSITE_AUTO)
{
self->composite_mode =
gimp_layer_mode_get_composite_mode (self->layer_mode);
g_warn_if_fail (self->composite_mode != GIMP_LAYER_COMPOSITE_AUTO);
}
self->function = gimp_layer_mode_get_function (self->layer_mode);
self->blend_function = gimp_layer_mode_get_blend_function (self->layer_mode);
input_extent = gegl_operation_source_get_bounding_box (operation, "input");
mask_extent = gegl_operation_source_get_bounding_box (operation, "aux2");
/* if the input pad has data, work as usual. */
if (input_extent && ! gegl_rectangle_is_empty (input_extent))
{
self->is_last_node = FALSE;
preferred_format = gegl_operation_get_source_format (operation, "input");
}
/* otherwise, we're the last node (corresponding to the bottom layer).
* in this case, we render the layer (as if) using UNION mode.
*/
else
{
self->is_last_node = TRUE;
/* if the layer mode doesn't affect the source, use a shortcut
* function that only applies the opacity/mask to the layer.
*/
if (! (gimp_operation_layer_mode_get_affected_region (self) &
GIMP_LAYER_COMPOSITE_REGION_SOURCE))
{
self->function = process_last_node;
}
/* otherwise, use the original process function, but force the
* composite mode to UNION.
*/
else
{
self->composite_mode = GIMP_LAYER_COMPOSITE_UNION;
}
preferred_format = gegl_operation_get_source_format (operation, "aux");
}
self->has_mask = mask_extent && ! gegl_rectangle_is_empty (mask_extent);
gimp_operation_layer_mode_cache_fishes (self, preferred_format);
format = gimp_layer_mode_get_format (self->layer_mode,
self->blend_space,
self->composite_space,
self->composite_mode,
preferred_format);
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_with_space ("Y float", format));
}
static GeglRectangle
gimp_operation_layer_mode_get_bounding_box (GeglOperation *op)
{
GimpOperationLayerMode *self = (gpointer) op;
GeglRectangle *in_rect;
GeglRectangle *aux_rect;
GeglRectangle *aux2_rect;
GeglRectangle src_rect = {};
GeglRectangle dst_rect = {};
GeglRectangle result;
GimpLayerCompositeRegion included_region;
in_rect = gegl_operation_source_get_bounding_box (op, "input");
aux_rect = gegl_operation_source_get_bounding_box (op, "aux");
aux2_rect = gegl_operation_source_get_bounding_box (op, "aux2");
if (in_rect)
dst_rect = *in_rect;
if (aux_rect)
{
src_rect = *aux_rect;
if (aux2_rect)
gegl_rectangle_intersect (&src_rect, &src_rect, aux2_rect);
}
if (self->is_last_node)
{
included_region = GIMP_LAYER_COMPOSITE_REGION_SOURCE;
}
else
{
included_region = gimp_layer_mode_get_included_region (self->layer_mode,
self->composite_mode);
}
if (self->prop_opacity == 0.0)
included_region &= ~GIMP_LAYER_COMPOSITE_REGION_SOURCE;
gegl_rectangle_intersect (&result, &src_rect, &dst_rect);
if (included_region & GIMP_LAYER_COMPOSITE_REGION_SOURCE)
gegl_rectangle_bounding_box (&result, &result, &src_rect);
if (included_region & GIMP_LAYER_COMPOSITE_REGION_DESTINATION)
gegl_rectangle_bounding_box (&result, &result, &dst_rect);
return result;
}
static gboolean
gimp_operation_layer_mode_parent_process (GeglOperation *operation,
GeglOperationContext *context,
const gchar *output_prop,
const GeglRectangle *result,
gint level)
{
GimpOperationLayerMode *point = GIMP_OPERATION_LAYER_MODE (operation);
point->opacity = point->prop_opacity;
/* if we have a mask, but it's not included in the output, pretend the
* opacity is 0, so that we don't composite 'aux' over 'input' as if there
* was no mask.
*/
if (point->has_mask)
{
GObject *mask;
gboolean has_mask;
/* get the raw value. this does not increase the reference count. */
mask = gegl_operation_context_get_object (context, "aux2");
/* disregard 'mask' if it's not included in the roi. */
has_mask =
mask &&
gegl_rectangle_intersect (NULL,
gegl_buffer_get_extent (GEGL_BUFFER (mask)),
result);
if (! has_mask)
point->opacity = 0.0;
}
return GIMP_OPERATION_LAYER_MODE_GET_CLASS (point)->parent_process (
operation, context, output_prop, result, level);
}
static gboolean
gimp_operation_layer_mode_process (GeglOperation *operation,
void *in,
void *layer,
void *mask,
void *out,
glong samples,
const GeglRectangle *roi,
gint level)
{
return ((GimpOperationLayerMode *) operation)->function (
operation, in, layer, mask, out, samples, roi, level);
}
static gboolean
gimp_operation_layer_mode_real_parent_process (GeglOperation *operation,
GeglOperationContext *context,
const gchar *output_prop,
const GeglRectangle *result,
gint level)
{
GimpOperationLayerMode *point = GIMP_OPERATION_LAYER_MODE (operation);
GObject *input;
GObject *aux;
gboolean has_input;
gboolean has_aux;
GimpLayerCompositeRegion included_region;
/* get the raw values. this does not increase the reference count. */
input = gegl_operation_context_get_object (context, "input");
aux = gegl_operation_context_get_object (context, "aux");
/* disregard 'input' if it's not included in the roi. */
has_input =
input &&
gegl_rectangle_intersect (NULL,
gegl_buffer_get_extent (GEGL_BUFFER (input)),
result);
/* disregard 'aux' if it's not included in the roi, or if it's fully
* transparent.
*/
has_aux =
aux &&
point->opacity != 0.0 &&
gegl_rectangle_intersect (NULL,
gegl_buffer_get_extent (GEGL_BUFFER (aux)),
result);
if (point->is_last_node)
{
included_region = GIMP_LAYER_COMPOSITE_REGION_SOURCE;
}
else
{
included_region = gimp_layer_mode_get_included_region (point->layer_mode,
point->composite_mode);
}
/* if there's no 'input' ... */
if (! has_input)
{
/* ... and there's 'aux', and the composite mode includes it (or we're
* the last node) ...
*/
if (has_aux && (included_region & GIMP_LAYER_COMPOSITE_REGION_SOURCE))
{
GimpLayerCompositeRegion affected_region;
affected_region =
gimp_operation_layer_mode_get_affected_region (point);
/* ... and the op doesn't otherwise affect 'aux', or changes its
* alpha ...
*/
if (! (affected_region & GIMP_LAYER_COMPOSITE_REGION_SOURCE) &&
point->opacity == 1.0 &&
! gegl_operation_context_get_object (context, "aux2"))
{
/* pass 'aux' directly as output; */
gegl_operation_context_set_object (context, "output", aux);
return TRUE;
}
/* otherwise, if the op affects 'aux', or changes its alpha, process
* it even though there's no 'input';
*/
}
/* otherwise, there's no 'aux', or the composite mode doesn't include it,
* and so ...
*/
else
{
/* ... the output is empty. */
gegl_operation_context_set_object (context, "output", NULL);
return TRUE;
}
}
/* otherwise, if there's 'input' but no 'aux' ... */
else if (! has_aux)
{
/* ... and the composite mode includes 'input' ... */
if (included_region & GIMP_LAYER_COMPOSITE_REGION_DESTINATION)
{
GimpLayerCompositeRegion affected_region;
affected_region =
gimp_operation_layer_mode_get_affected_region (point);
/* ... and the op doesn't otherwise affect 'input' ... */
if (! (affected_region & GIMP_LAYER_COMPOSITE_REGION_DESTINATION))
{
/* pass 'input' directly as output; */
gegl_operation_context_set_object (context, "output", input);
return TRUE;
}
/* otherwise, if the op affects 'input', process it even though
* there's no 'aux';
*/
}
/* otherwise, the output is fully transparent, but we process it anyway
* to maintain the 'input' color values.
*/
}
/* FIXME: we don't actually handle the case where one of the inputs
* is NULL -- it'll just segfault. 'input' is not expected to be NULL,
* but 'aux' might be, currently.
*/
if (! input || ! aux)
{
GObject *empty = G_OBJECT (gegl_buffer_new (NULL, NULL));
if (! input) gegl_operation_context_set_object (context, "input", empty);
if (! aux) gegl_operation_context_set_object (context, "aux", empty);
if (! input && ! aux)
gegl_object_set_has_forked (G_OBJECT (empty));
g_object_unref (empty);
}
/* 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 gboolean
gimp_operation_layer_mode_real_process (GeglOperation *operation,
void *in_p,
void *layer_p,
void *mask_p,
void *out_p,
glong samples,
const GeglRectangle *roi,
gint level)
{
GimpOperationLayerMode *layer_mode = (gpointer) operation;
gfloat *in = in_p;
gfloat *out = out_p;
gfloat *layer = layer_p;
gfloat *mask = mask_p;
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;
GimpLayerModeBlendFunc blend_function = layer_mode->blend_function;
gboolean composite_needs_in_color;
gfloat *blend_in;
gfloat *blend_layer;
gfloat *blend_out;
const Babl *composite_to_blend_fish = NULL;
const Babl *blend_to_composite_fish = NULL;
/* make sure we don't process more than GIMP_COMPOSITE_BLEND_MAX_SAMPLES
* at a time, so that we don't overflow the stack if we allocate buffers
* on it. note that this has to be done with a nested function call,
* because alloca'd buffers remain for the duration of the stack frame.
*/
while (samples > GIMP_COMPOSITE_BLEND_MAX_SAMPLES)
{
gimp_operation_layer_mode_real_process (operation,
in, layer, mask, out,
GIMP_COMPOSITE_BLEND_MAX_SAMPLES,
roi, level);
in += 4 * GIMP_COMPOSITE_BLEND_MAX_SAMPLES;
layer += 4 * GIMP_COMPOSITE_BLEND_MAX_SAMPLES;
if (mask)
mask += GIMP_COMPOSITE_BLEND_MAX_SAMPLES;
out += 4 * GIMP_COMPOSITE_BLEND_MAX_SAMPLES;
samples -= GIMP_COMPOSITE_BLEND_MAX_SAMPLES;
}
composite_needs_in_color =
composite_mode == GIMP_LAYER_COMPOSITE_UNION ||
composite_mode == GIMP_LAYER_COMPOSITE_CLIP_TO_BACKDROP;
blend_in = in;
blend_layer = layer;
blend_out = out;
if (blend_space != GIMP_LAYER_COLOR_SPACE_AUTO)
{
gimp_assert (composite_space >= 1 && composite_space < 4);
gimp_assert (blend_space >= 1 && blend_space < 4);
/* Make sure the cache is set up from the start as the
* operation's prepare() method may have not been run yet.
*/
gimp_operation_layer_mode_cache_fishes (layer_mode, NULL);
composite_to_blend_fish = layer_mode->space_fish [composite_space - 1]
[blend_space - 1];
blend_to_composite_fish = layer_mode->space_fish [blend_space - 1]
[composite_space - 1];
}
/* if we need to convert the samples between the composite and blend
* spaces...
*/
if (composite_to_blend_fish)
{
gint i;
gint end;
if (in != out || composite_needs_in_color)
{
/* 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);
if (in == out) /* in-place detected, avoid clobbering since we need to
read 'in' for the compositing stage */
{
if (blend_layer != layer)
blend_out = blend_layer;
else
blend_out = g_alloca (sizeof (gfloat) * 4 * samples);
}
/* samples whose the source or destination alpha is zero are not blended,
* and therefore do not need to be converted. while it's generally
* desirable to perform conversion and blending in bulk, when we have
* more than a certain number of consecutive unblended samples, the cost
* of converting them outweighs the cost of splitting the process around
* them to avoid the conversion.
*/
i = ALPHA;
end = 4 * samples + ALPHA;
while (TRUE)
{
gint first;
gint last;
gint count;
/* skip any unblended samples. the color values of `blend_out` for
* these samples are unconstrained, in particular, they may be NaN,
* but the alpha values should generally be finite, and specifically
* 0 when the source alpha is 0.
*/
while (i < end && (in[i] == 0.0f || layer[i] == 0.0f))
{
blend_out[i] = 0.0f;
i += 4;
}
/* stop if there are no more samples */
if (i == end)
break;
/* otherwise, keep scanning the samples until we find
* GIMP_COMPOSITE_BLEND_SPLIT_THRESHOLD consecutive unblended
* samples.
*/
first = i;
i += 4;
last = i;
while (i < end && i - last < 4 * GIMP_COMPOSITE_BLEND_SPLIT_THRESHOLD)
{
gboolean blended;
blended = (in[i] != 0.0f && layer[i] != 0.0f);
i += 4;
if (blended)
last = i;
}
/* convert and blend the samples in the range [first, last) */
count = (last - first) / 4;
first -= ALPHA;
babl_process (composite_to_blend_fish,
in + first, blend_in + first, count);
babl_process (composite_to_blend_fish,
layer + first, blend_layer + first, count);
blend_function (operation, blend_in + first, blend_layer + first,
blend_out + first, count);
babl_process (blend_to_composite_fish,
blend_out + first, blend_out + first, count);
/* make sure the alpha values of `blend_out` are valid for the
* trailing unblended samples.
*/
for (; last < i; last += 4)
blend_out[last] = 0.0f;
}
}
else
{
/* if both blending and compositing use the same color space, things are
* much simpler.
*/
if (in == out) /* in-place detected, avoid clobbering since we need to
read 'in' for the compositing stage */
{
blend_out = g_alloca (sizeof (gfloat) * 4 * samples);
}
blend_function (operation, blend_in, blend_layer, blend_out, samples);
}
if (! gimp_layer_mode_is_subtractive (layer_mode->layer_mode))
{
switch (composite_mode)
{
case GIMP_LAYER_COMPOSITE_UNION:
case GIMP_LAYER_COMPOSITE_AUTO:
composite_union (in, layer, blend_out, mask, opacity,
out, samples);
break;
case GIMP_LAYER_COMPOSITE_CLIP_TO_BACKDROP:
composite_clip_to_backdrop (in, layer, blend_out, mask, opacity,
out, samples);
break;
case GIMP_LAYER_COMPOSITE_CLIP_TO_LAYER:
composite_clip_to_layer (in, layer, blend_out, mask, opacity,
out, samples);
break;
case GIMP_LAYER_COMPOSITE_INTERSECTION:
composite_intersection (in, layer, blend_out, mask, opacity,
out, samples);
break;
}
}
else
{
switch (composite_mode)
{
case GIMP_LAYER_COMPOSITE_UNION:
case GIMP_LAYER_COMPOSITE_AUTO:
composite_union_sub (in, layer, blend_out, mask, opacity,
out, samples);
break;
case GIMP_LAYER_COMPOSITE_CLIP_TO_BACKDROP:
composite_clip_to_backdrop_sub (in, layer, blend_out, mask, opacity,
out, samples);
break;
case GIMP_LAYER_COMPOSITE_CLIP_TO_LAYER:
composite_clip_to_layer_sub (in, layer, blend_out, mask, opacity,
out, samples);
break;
case GIMP_LAYER_COMPOSITE_INTERSECTION:
composite_intersection_sub (in, layer, blend_out, mask, opacity,
out, samples);
break;
}
}
return TRUE;
}
static gboolean
process_last_node (GeglOperation *operation,
void *in_p,
void *layer_p,
void *mask_p,
void *out_p,
glong samples,
const GeglRectangle *roi,
gint level)
{
gfloat *out = out_p;
gfloat *layer = layer_p;
gfloat *mask = mask_p;
gfloat opacity = GIMP_OPERATION_LAYER_MODE (operation)->opacity;
while (samples--)
{
memcpy (out, layer, 3 * sizeof (gfloat));
out[ALPHA] = layer[ALPHA] * opacity;
if (mask)
out[ALPHA] *= *mask++;
layer += 4;
out += 4;
}
return TRUE;
}
static void
gimp_operation_layer_mode_cache_fishes (GimpOperationLayerMode *op,
const Babl *preferred_format)
{
const Babl *format;
if (! preferred_format)
{
const GeglRectangle *input_extent;
input_extent = gegl_operation_source_get_bounding_box (GEGL_OPERATION (op), "input");
if (input_extent && ! gegl_rectangle_is_empty (input_extent))
preferred_format = gegl_operation_get_source_format (GEGL_OPERATION (op), "input");
else
preferred_format = gegl_operation_get_source_format (GEGL_OPERATION (op), "aux");
}
format = gimp_layer_mode_get_format (op->layer_mode,
op->blend_space,
op->composite_space,
op->composite_mode,
preferred_format);
if (op->cached_fish_format != format)
{
op->cached_fish_format = format;
op->space_fish
/* from */ [GIMP_LAYER_COLOR_SPACE_RGB_LINEAR - 1]
/* to */ [GIMP_LAYER_COLOR_SPACE_RGB_PERCEPTUAL - 1] =
babl_fish (babl_format_with_space ("RGBA float", format),
babl_format_with_space ("R'G'B'A float", format));
op->space_fish
/* from */ [GIMP_LAYER_COLOR_SPACE_RGB_LINEAR - 1]
/* to */ [GIMP_LAYER_COLOR_SPACE_LAB - 1] =
babl_fish (babl_format_with_space ("RGBA float", format),
babl_format_with_space ("CIE Lab alpha float", format));
op->space_fish
/* from */ [GIMP_LAYER_COLOR_SPACE_RGB_PERCEPTUAL - 1]
/* to */ [GIMP_LAYER_COLOR_SPACE_RGB_LINEAR - 1] =
babl_fish (babl_format_with_space("R'G'B'A float", format),
babl_format_with_space ( "RGBA float", format));
op->space_fish
/* from */ [GIMP_LAYER_COLOR_SPACE_RGB_PERCEPTUAL - 1]
/* to */ [GIMP_LAYER_COLOR_SPACE_LAB - 1] =
babl_fish (babl_format_with_space("R'G'B'A float", format),
babl_format_with_space ( "CIE Lab alpha float", format));
op->space_fish
/* from */ [GIMP_LAYER_COLOR_SPACE_LAB - 1]
/* to */ [GIMP_LAYER_COLOR_SPACE_RGB_LINEAR - 1] =
babl_fish (babl_format_with_space("CIE Lab alpha float", format),
babl_format_with_space ( "RGBA float", format));
op->space_fish
/* from */ [GIMP_LAYER_COLOR_SPACE_LAB - 1]
/* to */ [GIMP_LAYER_COLOR_SPACE_RGB_PERCEPTUAL - 1] =
babl_fish (babl_format_with_space("CIE Lab alpha float", format),
babl_format_with_space ( "R'G'B'A float", format));
}
}
/* public functions */
GimpLayerCompositeRegion
gimp_operation_layer_mode_get_affected_region (GimpOperationLayerMode *layer_mode)
{
GimpOperationLayerModeClass *klass;
g_return_val_if_fail (GIMP_IS_OPERATION_LAYER_MODE (layer_mode),
GIMP_LAYER_COMPOSITE_REGION_INTERSECTION);
klass = GIMP_OPERATION_LAYER_MODE_GET_CLASS (layer_mode);
if (klass->get_affected_region)
return klass->get_affected_region (layer_mode);
return GIMP_LAYER_COMPOSITE_REGION_INTERSECTION;
}
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