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PIKApp/app/display/pikacanvastransformpreview.c

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/* 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
*
* pikacanvastransformpreview.c
* Copyright (C) 2011 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 <gegl.h>
#include <gtk/gtk.h>
#include "libpikabase/pikabase.h"
#include "libpikamath/pikamath.h"
#include "libpikacolor/pikacolor.h"
#include "libpikawidgets/pikawidgets.h"
#include "display/display-types.h"
#include "gegl/pika-gegl-nodes.h"
#include "gegl/pika-gegl-utils.h"
#include "gegl/pikatilehandlervalidate.h"
#include "core/pika-transform-resize.h"
#include "core/pika-transform-utils.h"
#include "core/pika-utils.h"
#include "core/pikachannel.h"
#include "core/pikaimage.h"
#include "core/pikalayer.h"
#include "core/pikapickable.h"
#include "pikacanvas.h"
#include "pikacanvastransformpreview.h"
#include "pikadisplayshell.h"
enum
{
PROP_0,
PROP_PICKABLE,
PROP_TRANSFORM,
PROP_CLIP,
PROP_X1,
PROP_Y1,
PROP_X2,
PROP_Y2,
PROP_OPACITY
};
typedef struct _PikaCanvasTransformPreviewPrivate PikaCanvasTransformPreviewPrivate;
struct _PikaCanvasTransformPreviewPrivate
{
PikaPickable *pickable;
PikaMatrix3 transform;
PikaTransformResize clip;
gdouble x1, y1;
gdouble x2, y2;
gdouble opacity;
GeglNode *node;
GeglNode *source_node;
GeglNode *convert_format_node;
GeglNode *layer_mask_source_node;
GeglNode *layer_mask_opacity_node;
GeglNode *mask_source_node;
GeglNode *mask_translate_node;
GeglNode *mask_crop_node;
GeglNode *opacity_node;
GeglNode *cache_node;
GeglNode *transform_node;
PikaPickable *node_pickable;
PikaDrawable *node_layer_mask;
PikaDrawable *node_mask;
GeglRectangle node_rect;
gdouble node_opacity;
PikaMatrix3 node_matrix;
GeglNode *node_output;
};
#define GET_PRIVATE(transform_preview) \
((PikaCanvasTransformPreviewPrivate *) pika_canvas_transform_preview_get_instance_private ((PikaCanvasTransformPreview *) (transform_preview)))
/* local function prototypes */
static void pika_canvas_transform_preview_dispose (GObject *object);
static void pika_canvas_transform_preview_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void pika_canvas_transform_preview_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void pika_canvas_transform_preview_draw (PikaCanvasItem *item,
cairo_t *cr);
static cairo_region_t * pika_canvas_transform_preview_get_extents (PikaCanvasItem *item);
static void pika_canvas_transform_preview_layer_changed (PikaLayer *layer,
PikaCanvasTransformPreview *transform_preview);
static void pika_canvas_transform_preview_set_pickable (PikaCanvasTransformPreview *transform_preview,
PikaPickable *pickable);
static void pika_canvas_transform_preview_sync_node (PikaCanvasTransformPreview *transform_preview);
G_DEFINE_TYPE_WITH_PRIVATE (PikaCanvasTransformPreview,
pika_canvas_transform_preview,
PIKA_TYPE_CANVAS_ITEM)
#define parent_class pika_canvas_transform_preview_parent_class
/* private functions */
static void
pika_canvas_transform_preview_class_init (PikaCanvasTransformPreviewClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PikaCanvasItemClass *item_class = PIKA_CANVAS_ITEM_CLASS (klass);
object_class->dispose = pika_canvas_transform_preview_dispose;
object_class->set_property = pika_canvas_transform_preview_set_property;
object_class->get_property = pika_canvas_transform_preview_get_property;
item_class->draw = pika_canvas_transform_preview_draw;
item_class->get_extents = pika_canvas_transform_preview_get_extents;
g_object_class_install_property (object_class, PROP_PICKABLE,
g_param_spec_object ("pickable",
NULL, NULL,
PIKA_TYPE_PICKABLE,
PIKA_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_TRANSFORM,
pika_param_spec_matrix3 ("transform",
NULL, NULL,
NULL,
PIKA_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_CLIP,
g_param_spec_enum ("clip",
NULL, NULL,
PIKA_TYPE_TRANSFORM_RESIZE,
PIKA_TRANSFORM_RESIZE_ADJUST,
PIKA_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_X1,
g_param_spec_double ("x1",
NULL, NULL,
-PIKA_MAX_IMAGE_SIZE,
PIKA_MAX_IMAGE_SIZE,
0.0,
PIKA_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_Y1,
g_param_spec_double ("y1",
NULL, NULL,
-PIKA_MAX_IMAGE_SIZE,
PIKA_MAX_IMAGE_SIZE,
0.0,
PIKA_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_X2,
g_param_spec_double ("x2",
NULL, NULL,
-PIKA_MAX_IMAGE_SIZE,
PIKA_MAX_IMAGE_SIZE,
0.0,
PIKA_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_Y2,
g_param_spec_double ("y2",
NULL, NULL,
-PIKA_MAX_IMAGE_SIZE,
PIKA_MAX_IMAGE_SIZE,
0.0,
PIKA_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_OPACITY,
g_param_spec_double ("opacity",
NULL, NULL,
0.0, 1.0, 1.0,
PIKA_PARAM_READWRITE));
}
static void
pika_canvas_transform_preview_init (PikaCanvasTransformPreview *transform_preview)
{
PikaCanvasTransformPreviewPrivate *private = GET_PRIVATE (transform_preview);
private->clip = PIKA_TRANSFORM_RESIZE_ADJUST;
private->opacity = 1.0;
}
static void
pika_canvas_transform_preview_dispose (GObject *object)
{
PikaCanvasTransformPreview *transform_preview = PIKA_CANVAS_TRANSFORM_PREVIEW (object);
PikaCanvasTransformPreviewPrivate *private = GET_PRIVATE (object);
g_clear_object (&private->node);
pika_canvas_transform_preview_set_pickable (transform_preview, NULL);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
pika_canvas_transform_preview_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
PikaCanvasTransformPreview *transform_preview = PIKA_CANVAS_TRANSFORM_PREVIEW (object);
PikaCanvasTransformPreviewPrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_PICKABLE:
pika_canvas_transform_preview_set_pickable (transform_preview,
g_value_get_object (value));
break;
case PROP_TRANSFORM:
{
PikaMatrix3 *transform = g_value_get_boxed (value);
if (transform)
private->transform = *transform;
else
pika_matrix3_identity (&private->transform);
}
break;
case PROP_CLIP:
private->clip = g_value_get_enum (value);
break;
case PROP_X1:
private->x1 = g_value_get_double (value);
break;
case PROP_Y1:
private->y1 = g_value_get_double (value);
break;
case PROP_X2:
private->x2 = g_value_get_double (value);
break;
case PROP_Y2:
private->y2 = g_value_get_double (value);
break;
case PROP_OPACITY:
private->opacity = g_value_get_double (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_canvas_transform_preview_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
PikaCanvasTransformPreviewPrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_PICKABLE:
g_value_set_object (value, private->pickable);
break;
case PROP_TRANSFORM:
g_value_set_boxed (value, &private->transform);
break;
case PROP_CLIP:
g_value_set_enum (value, private->clip);
break;
case PROP_X1:
g_value_set_double (value, private->x1);
break;
case PROP_Y1:
g_value_set_double (value, private->y1);
break;
case PROP_X2:
g_value_set_double (value, private->x2);
break;
case PROP_Y2:
g_value_set_double (value, private->y2);
break;
case PROP_OPACITY:
g_value_set_double (value, private->opacity);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gboolean
pika_canvas_transform_preview_transform (PikaCanvasItem *item,
cairo_rectangle_int_t *extents)
{
PikaCanvasTransformPreviewPrivate *private = GET_PRIVATE (item);
gint x1, y1;
gint x2, y2;
gdouble tx1, ty1;
gdouble tx2, ty2;
if (! pika_transform_resize_boundary (&private->transform,
private->clip,
private->x1, private->y1,
private->x2, private->y2,
&x1, &y1,
&x2, &y2))
{
return FALSE;
}
pika_canvas_item_transform_xy_f (item, x1, y1, &tx1, &ty1);
pika_canvas_item_transform_xy_f (item, x2, y2, &tx2, &ty2);
extents->x = (gint) floor (tx1);
extents->y = (gint) floor (ty1);
extents->width = (gint) ceil (tx2) - extents->x;
extents->height = (gint) ceil (ty2) - extents->y;
return TRUE;
}
static void
pika_canvas_transform_preview_draw (PikaCanvasItem *item,
cairo_t *cr)
{
PikaCanvasTransformPreview *transform_preview = PIKA_CANVAS_TRANSFORM_PREVIEW (item);
PikaCanvasTransformPreviewPrivate *private = GET_PRIVATE (item);
PikaDisplayShell *shell = pika_canvas_item_get_shell (item);
cairo_rectangle_int_t extents;
gdouble clip_x1, clip_y1;
gdouble clip_x2, clip_y2;
GeglRectangle bounds;
cairo_surface_t *surface;
guchar *surface_data;
gint surface_stride;
if (! pika_canvas_transform_preview_transform (item, &extents))
return;
cairo_clip_extents (cr, &clip_x1, &clip_y1, &clip_x2, &clip_y2);
clip_x1 = floor (clip_x1);
clip_y1 = floor (clip_y1);
clip_x2 = ceil (clip_x2);
clip_y2 = ceil (clip_y2);
if (! gegl_rectangle_intersect (&bounds,
GEGL_RECTANGLE (extents.x,
extents.y,
extents.width,
extents.height),
GEGL_RECTANGLE (clip_x1,
clip_y1,
clip_x2 - clip_x1,
clip_y2 - clip_y1)))
{
return;
}
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
bounds.width, bounds.height);
g_return_if_fail (surface != NULL);
surface_data = cairo_image_surface_get_data (surface);
surface_stride = cairo_image_surface_get_stride (surface);
pika_canvas_transform_preview_sync_node (transform_preview);
gegl_node_blit (private->node_output, 1.0,
GEGL_RECTANGLE (bounds.x + shell->offset_x,
bounds.y + shell->offset_y,
bounds.width,
bounds.height),
babl_format ("cairo-ARGB32"), surface_data, surface_stride,
GEGL_BLIT_CACHE);
cairo_surface_mark_dirty (surface);
cairo_set_source_surface (cr, surface, bounds.x, bounds.y);
cairo_rectangle (cr, bounds.x, bounds.y, bounds.width, bounds.height);
cairo_fill (cr);
cairo_surface_destroy (surface);
}
static cairo_region_t *
pika_canvas_transform_preview_get_extents (PikaCanvasItem *item)
{
cairo_rectangle_int_t rectangle;
if (pika_canvas_transform_preview_transform (item, &rectangle))
return cairo_region_create_rectangle (&rectangle);
return NULL;
}
static void
pika_canvas_transform_preview_layer_changed (PikaLayer *layer,
PikaCanvasTransformPreview *transform_preview)
{
PikaCanvasItem *item = PIKA_CANVAS_ITEM (transform_preview);
pika_canvas_item_begin_change (item);
pika_canvas_item_end_change (item);
}
static void
pika_canvas_transform_preview_set_pickable (PikaCanvasTransformPreview *transform_preview,
PikaPickable *pickable)
{
PikaCanvasTransformPreviewPrivate *private = GET_PRIVATE (transform_preview);
if (private->pickable && PIKA_IS_LAYER (private->pickable))
{
g_signal_handlers_disconnect_by_func (
private->pickable,
pika_canvas_transform_preview_layer_changed,
transform_preview);
}
g_set_object (&private->pickable, pickable);
if (pickable && PIKA_IS_LAYER (pickable))
{
g_signal_connect (pickable, "opacity-changed",
G_CALLBACK (pika_canvas_transform_preview_layer_changed),
transform_preview);
g_signal_connect (pickable, "mask-changed",
G_CALLBACK (pika_canvas_transform_preview_layer_changed),
transform_preview);
g_signal_connect (pickable, "apply-mask-changed",
G_CALLBACK (pika_canvas_transform_preview_layer_changed),
transform_preview);
g_signal_connect (pickable, "show-mask-changed",
G_CALLBACK (pika_canvas_transform_preview_layer_changed),
transform_preview);
}
}
static void
pika_canvas_transform_preview_sync_node (PikaCanvasTransformPreview *transform_preview)
{
PikaCanvasTransformPreviewPrivate *private = GET_PRIVATE (transform_preview);
PikaCanvasItem *item = PIKA_CANVAS_ITEM (transform_preview);
PikaDisplayShell *shell = pika_canvas_item_get_shell (item);
PikaImage *image = pika_canvas_item_get_image (item);
PikaPickable *pickable = private->pickable;
PikaDrawable *layer_mask = NULL;
PikaDrawable *mask = NULL;
gdouble opacity = private->opacity;
gint offset_x = 0;
gint offset_y = 0;
PikaMatrix3 matrix;
if (! private->node)
{
private->node = gegl_node_new ();
private->source_node =
gegl_node_new_child (private->node,
"operation", "pika:buffer-source-validate",
NULL);
private->convert_format_node =
gegl_node_new_child (private->node,
"operation", "gegl:convert-format",
NULL);
private->layer_mask_source_node =
gegl_node_new_child (private->node,
"operation", "pika:buffer-source-validate",
NULL);
private->layer_mask_opacity_node =
gegl_node_new_child (private->node,
"operation", "gegl:opacity",
NULL);
private->mask_source_node =
gegl_node_new_child (private->node,
"operation", "pika:buffer-source-validate",
NULL);
private->mask_translate_node =
gegl_node_new_child (private->node,
"operation", "gegl:translate",
NULL);
private->mask_crop_node =
gegl_node_new_child (private->node,
"operation", "gegl:crop",
"width", 0.0,
"height", 0.0,
NULL);
private->opacity_node =
gegl_node_new_child (private->node,
"operation", "gegl:opacity",
NULL);
private->cache_node =
gegl_node_new_child (private->node,
"operation", "gegl:cache",
NULL);
private->transform_node =
gegl_node_new_child (private->node,
"operation", "gegl:transform",
"near-z", PIKA_TRANSFORM_NEAR_Z,
"sampler", PIKA_INTERPOLATION_NONE,
NULL);
gegl_node_link_many (private->source_node,
private->convert_format_node,
private->transform_node,
NULL);
gegl_node_connect (private->layer_mask_source_node, "output",
private->layer_mask_opacity_node, "aux");
gegl_node_link_many (private->mask_source_node,
private->mask_translate_node,
private->mask_crop_node,
NULL);
private->node_pickable = NULL;
private->node_layer_mask = NULL;
private->node_mask = NULL;
private->node_rect = *GEGL_RECTANGLE (0, 0, 0, 0);
private->node_opacity = 1.0;
pika_matrix3_identity (&private->node_matrix);
private->node_output = private->transform_node;
}
if (PIKA_IS_ITEM (pickable))
{
pika_item_get_offset (PIKA_ITEM (private->pickable),
&offset_x, &offset_y);
if (pika_item_mask_bounds (PIKA_ITEM (pickable),
NULL, NULL, NULL, NULL))
{
mask = PIKA_DRAWABLE (pika_image_get_mask (image));
}
if (PIKA_IS_LAYER (pickable))
{
PikaLayer *layer = PIKA_LAYER (pickable);
opacity *= pika_layer_get_opacity (layer);
layer_mask = PIKA_DRAWABLE (pika_layer_get_mask (layer));
if (layer_mask)
{
if (pika_layer_get_show_mask (layer) && ! mask)
{
pickable = PIKA_PICKABLE (layer_mask);
layer_mask = NULL;
}
else if (! pika_layer_get_apply_mask (layer))
{
layer_mask = NULL;
}
}
}
}
pika_matrix3_identity (&matrix);
pika_matrix3_translate (&matrix, offset_x, offset_y);
pika_matrix3_mult (&private->transform, &matrix);
pika_matrix3_scale (&matrix, shell->scale_x, shell->scale_y);
if (pickable != private->node_pickable)
{
GeglBuffer *buffer;
pika_pickable_flush (pickable);
buffer = pika_pickable_get_buffer (pickable);
if (pika_tile_handler_validate_get_assigned (buffer))
buffer = pika_gegl_buffer_dup (buffer);
else
buffer = g_object_ref (buffer);
gegl_node_set (private->source_node,
"buffer", buffer,
NULL);
gegl_node_set (private->convert_format_node,
"format", pika_pickable_get_format_with_alpha (pickable),
NULL);
g_object_unref (buffer);
}
if (layer_mask != private->node_layer_mask)
{
gegl_node_set (private->layer_mask_source_node,
"buffer", layer_mask ?
pika_drawable_get_buffer (layer_mask) :
NULL,
NULL);
}
if (mask)
{
GeglRectangle rect;
rect.x = offset_x;
rect.y = offset_y;
rect.width = pika_item_get_width (PIKA_ITEM (private->pickable));
rect.height = pika_item_get_height (PIKA_ITEM (private->pickable));
if (mask != private->node_mask)
{
gegl_node_set (private->mask_source_node,
"buffer", pika_drawable_get_buffer (mask),
NULL);
}
if (! gegl_rectangle_equal (&rect, &private->node_rect))
{
private->node_rect = rect;
gegl_node_set (private->mask_translate_node,
"x", (gdouble) -rect.x,
"y", (gdouble) -rect.y,
NULL);
gegl_node_set (private->mask_crop_node,
"width", (gdouble) rect.width,
"height", (gdouble) rect.height,
NULL);
}
if (! private->node_mask)
{
gegl_node_connect (private->mask_crop_node, "output",
private->opacity_node, "aux");
}
}
else if (private->node_mask)
{
gegl_node_disconnect (private->opacity_node, "aux");
}
if (opacity != private->node_opacity)
{
gegl_node_set (private->opacity_node,
"value", opacity,
NULL);
}
if (layer_mask != private->node_layer_mask ||
mask != private->node_mask ||
(opacity != 1.0) != (private->node_opacity != 1.0))
{
GeglNode *output = private->source_node;
if (layer_mask && ! mask)
{
gegl_node_link (output, private->layer_mask_opacity_node);
output = private->layer_mask_opacity_node;
}
else
{
gegl_node_disconnect (private->layer_mask_opacity_node, "input");
}
if (mask || (opacity != 1.0))
{
gegl_node_link (output, private->opacity_node);
output = private->opacity_node;
}
else
{
gegl_node_disconnect (private->opacity_node, "input");
}
if (output == private->source_node)
{
gegl_node_disconnect (private->cache_node, "input");
gegl_node_link (output, private->convert_format_node);
output = private->convert_format_node;
}
else
{
gegl_node_disconnect (private->convert_format_node, "input");
gegl_node_link (output, private->cache_node);
output = private->cache_node;
}
gegl_node_link (output, private->transform_node);
output = private->transform_node;
if (layer_mask && mask)
{
gegl_node_link (output, private->layer_mask_opacity_node);
output = private->layer_mask_opacity_node;
}
private->node_output = output;
}
if (memcmp (&matrix, &private->node_matrix, sizeof (matrix)))
{
private->node_matrix = matrix;
pika_gegl_node_set_matrix (private->transform_node, &matrix);
}
private->node_pickable = pickable;
private->node_layer_mask = layer_mask;
private->node_mask = mask;
private->node_opacity = opacity;
}
/* public functions */
PikaCanvasItem *
pika_canvas_transform_preview_new (PikaDisplayShell *shell,
PikaPickable *pickable,
const PikaMatrix3 *transform,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2)
{
g_return_val_if_fail (PIKA_IS_DISPLAY_SHELL (shell), NULL);
g_return_val_if_fail (PIKA_IS_PICKABLE (pickable), NULL);
g_return_val_if_fail (transform != NULL, NULL);
return g_object_new (PIKA_TYPE_CANVAS_TRANSFORM_PREVIEW,
"shell", shell,
"pickable", pickable,
"transform", transform,
"x1", x1,
"y1", y1,
"x2", x2,
"y2", y2,
NULL);
}
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