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Gimp/app/widgets/gimpviewrenderer.c
Jehan b6856af9d8 app: GimpGradient now uses GeglColor. 
I still see some limitations in GimpGradient, and in particular, they are still
always stored as RGB in GGR files. It would be nice if we could store the actual
color format. This way, if someone chooses a gradient stop as Lab or CMYK color,
that's what the gradient file would keep track of. But also even storing the
space of a color (instead of storing/loading always in sRGB, even though this
may still work fine as we store unbounded double values). This might warrant for
a v2 of GGR file format.

This commit also fixes loading of SVG gradient which was apparently broken
regarding hexadecimal color parsing.

Finally I improve gegl_color_set_alpha() by adding an alpha channel when the
initial format had none.
2024-02-11 23:28:03 +01:00

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpviewrenderer.c
* Copyright (C) 2003 Michael Natterer <mitch@gimp.org>
* Copyright (C) 2007 Sven Neumann <sven@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 "libgimpcolor/gimpcolor.h"
#include "libgimpconfig/gimpconfig.h"
#include "libgimpmath/gimpmath.h"
#include "libgimpbase/gimpbase.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "widgets-types.h"
#include "config/gimpcoreconfig.h"
#include "gegl/gimp-gegl-loops.h"
#include "core/gimp.h"
#include "core/gimpcontext.h"
#include "core/gimpimage.h"
#include "core/gimptempbuf.h"
#include "core/gimpviewable.h"
#include "gimprender.h"
#include "gimpviewrenderer.h"
#include "gimpviewrenderer-utils.h"
#include "gimpwidgets-utils.h"
#include "gimp-priorities.h"
#define RGB_EPSILON 1e-6
enum
{
UPDATE,
LAST_SIGNAL
};
struct _GimpViewRendererPrivate
{
cairo_pattern_t *pattern;
cairo_surface_t *icon_surface;
gchar *bg_icon_name;
GimpColorConfig *color_config;
GimpColorTransform *profile_transform;
gboolean needs_render;
guint idle_id;
};
static void gimp_view_renderer_dispose (GObject *object);
static void gimp_view_renderer_finalize (GObject *object);
static gboolean gimp_view_renderer_idle_update (GimpViewRenderer *renderer);
static void gimp_view_renderer_real_set_context (GimpViewRenderer *renderer,
GimpContext *context);
static void gimp_view_renderer_real_invalidate (GimpViewRenderer *renderer);
static void gimp_view_renderer_real_draw (GimpViewRenderer *renderer,
GtkWidget *widget,
cairo_t *cr,
gint available_width,
gint available_height);
static void gimp_view_renderer_real_render (GimpViewRenderer *renderer,
GtkWidget *widget);
static void gimp_view_renderer_size_changed (GimpViewRenderer *renderer,
GimpViewable *viewable);
static void gimp_view_renderer_profile_changed (GimpViewRenderer *renderer,
GimpViewable *viewable);
static void gimp_view_renderer_config_notify (GObject *config,
const GParamSpec *pspec,
GimpViewRenderer *renderer);
static void gimp_view_render_temp_buf_to_surface (GimpViewRenderer *renderer,
GtkWidget *widget,
GimpTempBuf *temp_buf,
gint temp_buf_x,
gint temp_buf_y,
gint channel,
GimpViewBG inside_bg,
GimpViewBG outside_bg,
cairo_surface_t *surface,
gint dest_width,
gint dest_height);
static cairo_pattern_t *
gimp_view_renderer_create_background (GimpViewRenderer *renderer,
GtkWidget *widget);
G_DEFINE_TYPE_WITH_PRIVATE (GimpViewRenderer, gimp_view_renderer, G_TYPE_OBJECT)
#define parent_class gimp_view_renderer_parent_class
static guint renderer_signals[LAST_SIGNAL] = { 0 };
static GimpRGB black_color;
static GimpRGB white_color;
static GimpRGB green_color;
static GimpRGB red_color;
static void
gimp_view_renderer_class_init (GimpViewRendererClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
renderer_signals[UPDATE] =
g_signal_new ("update",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpViewRendererClass, update),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
object_class->dispose = gimp_view_renderer_dispose;
object_class->finalize = gimp_view_renderer_finalize;
klass->update = NULL;
klass->set_context = gimp_view_renderer_real_set_context;
klass->invalidate = gimp_view_renderer_real_invalidate;
klass->draw = gimp_view_renderer_real_draw;
klass->render = gimp_view_renderer_real_render;
klass->frame = NULL;
klass->frame_left = 0;
klass->frame_right = 0;
klass->frame_top = 0;
klass->frame_bottom = 0;
gimp_rgba_set (&black_color, 0.0, 0.0, 0.0, GIMP_OPACITY_OPAQUE);
gimp_rgba_set (&white_color, 1.0, 1.0, 1.0, GIMP_OPACITY_OPAQUE);
gimp_rgba_set (&green_color, 0.0, 0.94, 0.0, GIMP_OPACITY_OPAQUE);
gimp_rgba_set (&red_color, 1.0, 0.0, 0.0, GIMP_OPACITY_OPAQUE);
}
static void
gimp_view_renderer_init (GimpViewRenderer *renderer)
{
renderer->priv = gimp_view_renderer_get_instance_private (renderer);
renderer->viewable = NULL;
renderer->dot_for_dot = TRUE;
renderer->border_type = GIMP_VIEW_BORDER_BLACK;
renderer->border_color = black_color;
renderer->size = -1;
renderer->priv->needs_render = TRUE;
}
static void
gimp_view_renderer_dispose (GObject *object)
{
GimpViewRenderer *renderer = GIMP_VIEW_RENDERER (object);
if (renderer->viewable)
gimp_view_renderer_set_viewable (renderer, NULL);
if (renderer->context)
gimp_view_renderer_set_context (renderer, NULL);
if (renderer->priv->color_config)
gimp_view_renderer_set_color_config (renderer, NULL);
gimp_view_renderer_remove_idle (renderer);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gimp_view_renderer_finalize (GObject *object)
{
GimpViewRenderer *renderer = GIMP_VIEW_RENDERER (object);
g_clear_pointer (&renderer->priv->pattern, cairo_pattern_destroy);
g_clear_pointer (&renderer->surface, cairo_surface_destroy);
g_clear_pointer (&renderer->priv->icon_surface, cairo_surface_destroy);
g_clear_pointer (&renderer->priv->bg_icon_name, g_free);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GimpViewRenderer *
gimp_view_renderer_new_internal (GimpContext *context,
GType viewable_type,
gboolean is_popup)
{
GimpViewRenderer *renderer;
renderer = g_object_new (gimp_view_renderer_type_from_viewable_type (viewable_type),
NULL);
renderer->viewable_type = viewable_type;
renderer->is_popup = is_popup ? TRUE : FALSE;
if (context)
gimp_view_renderer_set_context (renderer, context);
return renderer;
}
/* public functions */
GimpViewRenderer *
gimp_view_renderer_new (GimpContext *context,
GType viewable_type,
gint size,
gint border_width,
gboolean is_popup)
{
GimpViewRenderer *renderer;
g_return_val_if_fail (context == NULL || GIMP_IS_CONTEXT (context), NULL);
g_return_val_if_fail (g_type_is_a (viewable_type, GIMP_TYPE_VIEWABLE), NULL);
g_return_val_if_fail (size > 0 &&
size <= GIMP_VIEWABLE_MAX_PREVIEW_SIZE, NULL);
g_return_val_if_fail (border_width >= 0 &&
border_width <= GIMP_VIEW_MAX_BORDER_WIDTH, NULL);
renderer = gimp_view_renderer_new_internal (context, viewable_type,
is_popup);
gimp_view_renderer_set_size (renderer, size, border_width);
gimp_view_renderer_remove_idle (renderer);
return renderer;
}
GimpViewRenderer *
gimp_view_renderer_new_full (GimpContext *context,
GType viewable_type,
gint width,
gint height,
gint border_width,
gboolean is_popup)
{
GimpViewRenderer *renderer;
g_return_val_if_fail (context == NULL || GIMP_IS_CONTEXT (context), NULL);
g_return_val_if_fail (g_type_is_a (viewable_type, GIMP_TYPE_VIEWABLE), NULL);
g_return_val_if_fail (width > 0 &&
width <= GIMP_VIEWABLE_MAX_PREVIEW_SIZE, NULL);
g_return_val_if_fail (height > 0 &&
height <= GIMP_VIEWABLE_MAX_PREVIEW_SIZE, NULL);
g_return_val_if_fail (border_width >= 0 &&
border_width <= GIMP_VIEW_MAX_BORDER_WIDTH, NULL);
renderer = gimp_view_renderer_new_internal (context, viewable_type,
is_popup);
gimp_view_renderer_set_size_full (renderer, width, height, border_width);
gimp_view_renderer_remove_idle (renderer);
return renderer;
}
void
gimp_view_renderer_set_context (GimpViewRenderer *renderer,
GimpContext *context)
{
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
g_return_if_fail (context == NULL || GIMP_IS_CONTEXT (context));
if (context != renderer->context)
{
GIMP_VIEW_RENDERER_GET_CLASS (renderer)->set_context (renderer,
context);
if (renderer->viewable)
gimp_view_renderer_invalidate (renderer);
}
}
static void
gimp_view_renderer_weak_notify (GimpViewRenderer *renderer,
GimpViewable *viewable)
{
renderer->viewable = NULL;
gimp_view_renderer_update_idle (renderer);
}
void
gimp_view_renderer_set_viewable (GimpViewRenderer *renderer,
GimpViewable *viewable)
{
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
g_return_if_fail (viewable == NULL || GIMP_IS_VIEWABLE (viewable));
if (viewable)
g_return_if_fail (g_type_is_a (G_TYPE_FROM_INSTANCE (viewable),
renderer->viewable_type));
if (viewable == renderer->viewable)
return;
g_clear_pointer (&renderer->surface, cairo_surface_destroy);
g_clear_pointer (&renderer->priv->icon_surface, cairo_surface_destroy);
gimp_view_renderer_free_color_transform (renderer);
if (renderer->viewable)
{
g_object_weak_unref (G_OBJECT (renderer->viewable),
(GWeakNotify) gimp_view_renderer_weak_notify,
renderer);
g_signal_handlers_disconnect_by_func (renderer->viewable,
G_CALLBACK (gimp_view_renderer_invalidate),
renderer);
g_signal_handlers_disconnect_by_func (renderer->viewable,
G_CALLBACK (gimp_view_renderer_size_changed),
renderer);
if (GIMP_IS_COLOR_MANAGED (renderer->viewable))
g_signal_handlers_disconnect_by_func (renderer->viewable,
G_CALLBACK (gimp_view_renderer_profile_changed),
renderer);
}
renderer->viewable = viewable;
if (renderer->viewable)
{
g_object_weak_ref (G_OBJECT (renderer->viewable),
(GWeakNotify) gimp_view_renderer_weak_notify,
renderer);
g_signal_connect_swapped (renderer->viewable,
"invalidate-preview",
G_CALLBACK (gimp_view_renderer_invalidate),
renderer);
g_signal_connect_swapped (renderer->viewable,
"size-changed",
G_CALLBACK (gimp_view_renderer_size_changed),
renderer);
if (GIMP_IS_COLOR_MANAGED (renderer->viewable))
g_signal_connect_swapped (renderer->viewable,
"profile-changed",
G_CALLBACK (gimp_view_renderer_profile_changed),
renderer);
if (renderer->size != -1)
gimp_view_renderer_set_size (renderer, renderer->size,
renderer->border_width);
gimp_view_renderer_invalidate (renderer);
}
else
{
gimp_view_renderer_update_idle (renderer);
}
}
void
gimp_view_renderer_set_size (GimpViewRenderer *renderer,
gint view_size,
gint border_width)
{
gint width;
gint height;
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
g_return_if_fail (view_size > 0 &&
view_size <= GIMP_VIEWABLE_MAX_PREVIEW_SIZE);
g_return_if_fail (border_width >= 0 &&
border_width <= GIMP_VIEW_MAX_BORDER_WIDTH);
renderer->size = view_size;
if (renderer->viewable)
{
gimp_viewable_get_preview_size (renderer->viewable,
view_size,
renderer->is_popup,
renderer->dot_for_dot,
&width, &height);
}
else
{
width = view_size;
height = view_size;
}
gimp_view_renderer_set_size_full (renderer, width, height, border_width);
}
void
gimp_view_renderer_set_size_full (GimpViewRenderer *renderer,
gint width,
gint height,
gint border_width)
{
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
g_return_if_fail (width > 0 &&
width <= GIMP_VIEWABLE_MAX_PREVIEW_SIZE);
g_return_if_fail (height > 0 &&
height <= GIMP_VIEWABLE_MAX_PREVIEW_SIZE);
g_return_if_fail (border_width >= 0 &&
border_width <= GIMP_VIEW_MAX_BORDER_WIDTH);
if (width != renderer->width ||
height != renderer->height ||
border_width != renderer->border_width)
{
renderer->width = width;
renderer->height = height;
renderer->border_width = border_width;
g_clear_pointer (&renderer->surface, cairo_surface_destroy);
if (renderer->viewable)
gimp_view_renderer_invalidate (renderer);
}
}
void
gimp_view_renderer_set_dot_for_dot (GimpViewRenderer *renderer,
gboolean dot_for_dot)
{
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
if (dot_for_dot != renderer->dot_for_dot)
{
renderer->dot_for_dot = dot_for_dot ? TRUE: FALSE;
if (renderer->size != -1)
gimp_view_renderer_set_size (renderer, renderer->size,
renderer->border_width);
gimp_view_renderer_invalidate (renderer);
}
}
void
gimp_view_renderer_set_border_type (GimpViewRenderer *renderer,
GimpViewBorderType border_type)
{
GimpRGB *border_color = &black_color;
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
renderer->border_type = border_type;
switch (border_type)
{
case GIMP_VIEW_BORDER_BLACK:
border_color = &black_color;
break;
case GIMP_VIEW_BORDER_WHITE:
border_color = &white_color;
break;
case GIMP_VIEW_BORDER_GREEN:
border_color = &green_color;
break;
case GIMP_VIEW_BORDER_RED:
border_color = &red_color;
break;
}
gimp_view_renderer_set_border_color (renderer, border_color);
}
void
gimp_view_renderer_set_border_color (GimpViewRenderer *renderer,
const GimpRGB *color)
{
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
g_return_if_fail (color != NULL);
if (gimp_rgb_distance (&renderer->border_color, color) > RGB_EPSILON)
{
renderer->border_color = *color;
gimp_view_renderer_update_idle (renderer);
}
}
void
gimp_view_renderer_set_background (GimpViewRenderer *renderer,
const gchar *icon_name)
{
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
if (renderer->priv->bg_icon_name)
g_free (renderer->priv->bg_icon_name);
renderer->priv->bg_icon_name = g_strdup (icon_name);
g_clear_object (&renderer->priv->pattern);
}
void
gimp_view_renderer_set_color_config (GimpViewRenderer *renderer,
GimpColorConfig *color_config)
{
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
g_return_if_fail (color_config == NULL || GIMP_IS_COLOR_CONFIG (color_config));
if (color_config != renderer->priv->color_config)
{
if (renderer->priv->color_config)
g_signal_handlers_disconnect_by_func (renderer->priv->color_config,
gimp_view_renderer_config_notify,
renderer);
g_set_object (&renderer->priv->color_config, color_config);
if (renderer->priv->color_config)
g_signal_connect (renderer->priv->color_config, "notify",
G_CALLBACK (gimp_view_renderer_config_notify),
renderer);
gimp_view_renderer_config_notify (G_OBJECT (renderer->priv->color_config),
NULL, renderer);
}
}
GimpColorConfig *
gimp_view_renderer_get_color_config (GimpViewRenderer *renderer)
{
g_return_val_if_fail (GIMP_IS_VIEW_RENDERER (renderer), NULL);
return renderer->priv->color_config;
}
void
gimp_view_renderer_invalidate (GimpViewRenderer *renderer)
{
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
if (renderer->priv->idle_id)
{
g_source_remove (renderer->priv->idle_id);
renderer->priv->idle_id = 0;
}
GIMP_VIEW_RENDERER_GET_CLASS (renderer)->invalidate (renderer);
renderer->priv->idle_id =
g_idle_add_full (GIMP_PRIORITY_VIEWABLE_IDLE,
(GSourceFunc) gimp_view_renderer_idle_update,
renderer, NULL);
}
void
gimp_view_renderer_update (GimpViewRenderer *renderer)
{
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
if (renderer->priv->idle_id)
{
g_source_remove (renderer->priv->idle_id);
renderer->priv->idle_id = 0;
}
g_signal_emit (renderer, renderer_signals[UPDATE], 0);
}
void
gimp_view_renderer_update_idle (GimpViewRenderer *renderer)
{
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
if (renderer->priv->idle_id)
g_source_remove (renderer->priv->idle_id);
renderer->priv->idle_id =
g_idle_add_full (GIMP_PRIORITY_VIEWABLE_IDLE,
(GSourceFunc) gimp_view_renderer_idle_update,
renderer, NULL);
}
void
gimp_view_renderer_remove_idle (GimpViewRenderer *renderer)
{
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
if (renderer->priv->idle_id)
{
g_source_remove (renderer->priv->idle_id);
renderer->priv->idle_id = 0;
}
}
void
gimp_view_renderer_draw (GimpViewRenderer *renderer,
GtkWidget *widget,
cairo_t *cr,
gint available_width,
gint available_height)
{
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (cr != NULL);
if (G_UNLIKELY (renderer->context == NULL))
g_warning ("%s: renderer->context is NULL", G_STRFUNC);
if (! gtk_widget_is_drawable (widget))
return;
if (renderer->viewable)
{
cairo_save (cr);
GIMP_VIEW_RENDERER_GET_CLASS (renderer)->draw (renderer, widget, cr,
available_width,
available_height);
cairo_restore (cr);
}
else
{
GimpViewableClass *viewable_class;
viewable_class = g_type_class_ref (renderer->viewable_type);
gimp_view_renderer_render_icon (renderer,
widget,
viewable_class->default_icon_name);
renderer->priv->needs_render = FALSE;
g_type_class_unref (viewable_class);
gimp_view_renderer_real_draw (renderer, widget, cr,
available_width,
available_height);
}
if (renderer->border_width > 0)
{
gint width = renderer->width + renderer->border_width;
gint height = renderer->height + renderer->border_width;
gdouble x, y;
cairo_set_line_width (cr, renderer->border_width);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
gimp_cairo_set_source_rgb (cr, &renderer->border_color);
x = (available_width - width) / 2.0;
y = (available_height - height) / 2.0;
cairo_rectangle (cr, x, y, width, height);
cairo_stroke (cr);
}
}
/* private functions */
static gboolean
gimp_view_renderer_idle_update (GimpViewRenderer *renderer)
{
renderer->priv->idle_id = 0;
gimp_view_renderer_update (renderer);
return FALSE;
}
static void
gimp_view_renderer_real_set_context (GimpViewRenderer *renderer,
GimpContext *context)
{
if (renderer->context &&
renderer->priv->color_config ==
renderer->context->gimp->config->color_management)
{
gimp_view_renderer_set_color_config (renderer, NULL);
}
g_set_object (&renderer->context, context);
if (renderer->context &&
renderer->priv->color_config == NULL)
{
gimp_view_renderer_set_color_config (renderer,
renderer->context->gimp->config->color_management);
}
}
static void
gimp_view_renderer_real_invalidate (GimpViewRenderer *renderer)
{
renderer->priv->needs_render = TRUE;
}
static void
gimp_view_renderer_real_draw (GimpViewRenderer *renderer,
GtkWidget *widget,
cairo_t *cr,
gint available_width,
gint available_height)
{
if (renderer->priv->needs_render)
{
GIMP_VIEW_RENDERER_GET_CLASS (renderer)->render (renderer, widget);
renderer->priv->needs_render = FALSE;
}
if (renderer->priv->icon_surface)
{
gint scale_factor = gtk_widget_get_scale_factor (widget);
gint width;
gint height;
gint x, y;
width = cairo_image_surface_get_width (renderer->priv->icon_surface);
height = cairo_image_surface_get_height (renderer->priv->icon_surface);
width /= scale_factor;
height /= scale_factor;
if (renderer->priv->bg_icon_name)
{
if (! renderer->priv->pattern)
{
renderer->priv->pattern =
gimp_view_renderer_create_background (renderer, widget);
}
cairo_set_source (cr, renderer->priv->pattern);
cairo_paint (cr);
}
x = (available_width - width) / 2;
y = (available_height - height) / 2;
cairo_set_source_surface (cr, renderer->priv->icon_surface, x, y);
cairo_rectangle (cr, x, y, width, height);
cairo_fill (cr);
}
else if (renderer->surface)
{
cairo_content_t content = cairo_surface_get_content (renderer->surface);
gint width = renderer->width;
gint height = renderer->height;
gint offset_x = (available_width - width) / 2;
gint offset_y = (available_height - height) / 2;
cairo_translate (cr, offset_x, offset_y);
cairo_rectangle (cr, 0, 0, width, height);
if (content == CAIRO_CONTENT_COLOR_ALPHA)
{
if (! renderer->priv->pattern)
{
GimpRGB rgb1;
GimpRGB rgb2;
gegl_color_get_pixel ((GeglColor *) gimp_render_check_color1 (), babl_format ("R'G'B'A double"), &rgb1);
gegl_color_get_pixel ((GeglColor *) gimp_render_check_color2 (), babl_format ("R'G'B'A double"), &rgb2);
renderer->priv->pattern = gimp_cairo_checkerboard_create (cr, GIMP_CHECK_SIZE_SM, &rgb1, &rgb2);
}
cairo_set_source (cr, renderer->priv->pattern);
cairo_fill_preserve (cr);
}
cairo_set_source_surface (cr, renderer->surface, 0, 0);
cairo_fill (cr);
cairo_translate (cr, - offset_x, - offset_y);
}
}
static void
gimp_view_renderer_real_render (GimpViewRenderer *renderer,
GtkWidget *widget)
{
GdkPixbuf *pixbuf;
GimpTempBuf *temp_buf;
const gchar *icon_name;
gint scale_factor = gtk_widget_get_scale_factor (widget);
pixbuf = gimp_viewable_get_pixbuf (renderer->viewable,
renderer->context,
renderer->width * scale_factor,
renderer->height * scale_factor);
if (pixbuf)
{
gimp_view_renderer_render_pixbuf (renderer, widget, pixbuf);
return;
}
temp_buf = gimp_viewable_get_preview (renderer->viewable,
renderer->context,
renderer->width,
renderer->height);
if (temp_buf)
{
gimp_view_renderer_render_temp_buf_simple (renderer, widget, temp_buf);
return;
}
icon_name = gimp_viewable_get_icon_name (renderer->viewable);
gimp_view_renderer_render_icon (renderer, widget, icon_name);
}
static void
gimp_view_renderer_size_changed (GimpViewRenderer *renderer,
GimpViewable *viewable)
{
if (renderer->size != -1)
gimp_view_renderer_set_size (renderer, renderer->size,
renderer->border_width);
gimp_view_renderer_invalidate (renderer);
}
static void
gimp_view_renderer_profile_changed (GimpViewRenderer *renderer,
GimpViewable *viewable)
{
gimp_view_renderer_free_color_transform (renderer);
}
static void
gimp_view_renderer_config_notify (GObject *config,
const GParamSpec *pspec,
GimpViewRenderer *renderer)
{
gimp_view_renderer_free_color_transform (renderer);
}
/* protected functions */
void
gimp_view_renderer_render_temp_buf_simple (GimpViewRenderer *renderer,
GtkWidget *widget,
GimpTempBuf *temp_buf)
{
gint temp_buf_x = 0;
gint temp_buf_y = 0;
gint temp_buf_width;
gint temp_buf_height;
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
g_return_if_fail (temp_buf != NULL);
temp_buf_width = gimp_temp_buf_get_width (temp_buf);
temp_buf_height = gimp_temp_buf_get_height (temp_buf);
if (temp_buf_width < renderer->width)
temp_buf_x = (renderer->width - temp_buf_width) / 2;
if (temp_buf_height < renderer->height)
temp_buf_y = (renderer->height - temp_buf_height) / 2;
gimp_view_renderer_render_temp_buf (renderer, widget, temp_buf,
temp_buf_x, temp_buf_y,
-1,
GIMP_VIEW_BG_CHECKS,
GIMP_VIEW_BG_WHITE);
}
void
gimp_view_renderer_render_temp_buf (GimpViewRenderer *renderer,
GtkWidget *widget,
GimpTempBuf *temp_buf,
gint temp_buf_x,
gint temp_buf_y,
gint channel,
GimpViewBG inside_bg,
GimpViewBG outside_bg)
{
g_clear_pointer (&renderer->priv->icon_surface, cairo_surface_destroy);
if (! renderer->surface)
renderer->surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24,
renderer->width,
renderer->height);
gimp_view_render_temp_buf_to_surface (renderer,
widget,
temp_buf,
temp_buf_x,
temp_buf_y,
channel,
inside_bg,
outside_bg,
renderer->surface,
renderer->width,
renderer->height);
}
void
gimp_view_renderer_render_pixbuf (GimpViewRenderer *renderer,
GtkWidget *widget,
GdkPixbuf *pixbuf)
{
GimpColorTransform *transform;
const Babl *format;
gint scale_factor;
g_clear_pointer (&renderer->surface, cairo_surface_destroy);
format = gimp_pixbuf_get_format (pixbuf);
transform = gimp_view_renderer_get_color_transform (renderer, widget,
format, format);
if (transform)
{
GdkPixbuf *new;
gint width = gdk_pixbuf_get_width (pixbuf);
gint height = gdk_pixbuf_get_height (pixbuf);
gsize src_stride = gdk_pixbuf_get_rowstride (pixbuf);
guchar *src = gdk_pixbuf_get_pixels (pixbuf);
gsize dest_stride;
guchar *dest;
gint i;
new = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
gdk_pixbuf_get_has_alpha (pixbuf),
8, width, height);
dest_stride = gdk_pixbuf_get_rowstride (new);
dest = gdk_pixbuf_get_pixels (new);
for (i = 0; i < height; i++)
{
gimp_color_transform_process_pixels (transform,
format, src,
format, dest,
width);
src += src_stride;
dest += dest_stride;
}
pixbuf = new;
}
else
{
g_object_ref (pixbuf);
}
scale_factor = gtk_widget_get_scale_factor (widget);
g_clear_pointer (&renderer->priv->icon_surface, cairo_surface_destroy);
renderer->priv->icon_surface =
gdk_cairo_surface_create_from_pixbuf (pixbuf, scale_factor, NULL);
g_object_unref (pixbuf);
}
void
gimp_view_renderer_render_icon (GimpViewRenderer *renderer,
GtkWidget *widget,
const gchar *icon_name)
{
GdkPixbuf *pixbuf;
gint scale_factor;
gint width;
gint height;
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (icon_name != NULL);
g_clear_pointer (&renderer->priv->icon_surface, cairo_surface_destroy);
g_clear_pointer (&renderer->surface, cairo_surface_destroy);
scale_factor = gtk_widget_get_scale_factor (widget);
pixbuf = gimp_widget_load_icon (widget, icon_name,
MIN (renderer->width, renderer->height));
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
if (width > renderer->width * scale_factor ||
height > renderer->height * scale_factor)
{
GdkPixbuf *scaled_pixbuf;
gimp_viewable_calc_preview_size (width, height,
renderer->width * scale_factor,
renderer->height * scale_factor,
TRUE, 1.0, 1.0,
&width, &height,
NULL);
scaled_pixbuf = gdk_pixbuf_scale_simple (pixbuf,
width * scale_factor,
height * scale_factor,
GDK_INTERP_BILINEAR);
g_object_unref (pixbuf);
pixbuf = scaled_pixbuf;
}
g_clear_pointer (&renderer->priv->icon_surface, cairo_surface_destroy);
renderer->priv->icon_surface =
gdk_cairo_surface_create_from_pixbuf (pixbuf, scale_factor, NULL);
g_object_unref (pixbuf);
}
GimpColorTransform *
gimp_view_renderer_get_color_transform (GimpViewRenderer *renderer,
GtkWidget *widget,
const Babl *src_format,
const Babl *dest_format)
{
GimpColorProfile *profile;
GimpColorProfile *proof_profile = NULL;
GimpColorRenderingIntent simulation_intent =
GIMP_COLOR_RENDERING_INTENT_RELATIVE_COLORIMETRIC;
gboolean simulation_bpc = FALSE;
GimpImage *image;
g_return_val_if_fail (GIMP_IS_VIEW_RENDERER (renderer), NULL);
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
g_return_val_if_fail (src_format != NULL, NULL);
g_return_val_if_fail (dest_format != NULL, NULL);
if (renderer->priv->profile_transform)
return renderer->priv->profile_transform;
if (! renderer->priv->color_config)
{
g_printerr ("EEK\n");
return NULL;
}
if (GIMP_IS_COLOR_MANAGED (renderer->viewable))
{
GimpColorManaged *managed = GIMP_COLOR_MANAGED (renderer->viewable);
profile = gimp_color_managed_get_color_profile (managed);
}
else
{
static GimpColorProfile *srgb_profile = NULL;
if (G_UNLIKELY (! srgb_profile))
srgb_profile = gimp_color_profile_new_rgb_srgb ();
profile = srgb_profile;
}
if (renderer->context)
{
image = gimp_context_get_image (GIMP_CONTEXT (renderer->context));
if (image)
{
proof_profile =
gimp_color_managed_get_simulation_profile (GIMP_COLOR_MANAGED (image));
simulation_intent =
gimp_color_managed_get_simulation_intent (GIMP_COLOR_MANAGED (image));
simulation_bpc =
gimp_color_managed_get_simulation_bpc (GIMP_COLOR_MANAGED (image));
}
}
renderer->priv->profile_transform =
gimp_widget_get_color_transform (widget,
renderer->priv->color_config,
profile,
src_format,
dest_format,
proof_profile,
simulation_intent,
simulation_bpc);
return renderer->priv->profile_transform;
}
void
gimp_view_renderer_free_color_transform (GimpViewRenderer *renderer)
{
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
g_clear_object (&renderer->priv->profile_transform);
gimp_view_renderer_invalidate (renderer);
}
/* private functions */
static void
gimp_view_render_temp_buf_to_surface (GimpViewRenderer *renderer,
GtkWidget *widget,
GimpTempBuf *temp_buf,
gint temp_buf_x,
gint temp_buf_y,
gint channel,
GimpViewBG inside_bg,
GimpViewBG outside_bg,
cairo_surface_t *surface,
gint surface_width,
gint surface_height)
{
cairo_t *cr;
gint x, y;
gint width, height;
const Babl *temp_buf_format;
gint temp_buf_width;
gint temp_buf_height;
g_return_if_fail (temp_buf != NULL);
g_return_if_fail (surface != NULL);
temp_buf_format = gimp_temp_buf_get_format (temp_buf);
temp_buf_width = gimp_temp_buf_get_width (temp_buf);
temp_buf_height = gimp_temp_buf_get_height (temp_buf);
/* Here are the different cases this functions handles correctly:
* 1) Offset temp_buf which does not necessarily cover full image area
* 2) Color conversion of temp_buf if it is gray and image is color
* 3) Background check buffer for transparent temp_bufs
* 4) Using the optional "channel" argument, one channel can be extracted
* from a multi-channel temp_buf and composited as a grayscale
* Prereqs:
* 1) Grayscale temp_bufs have bytes == {1, 2}
* 2) Color temp_bufs have bytes == {3, 4}
* 3) If image is gray, then temp_buf should have bytes == {1, 2}
*/
cr = cairo_create (surface);
if (outside_bg == GIMP_VIEW_BG_CHECKS ||
inside_bg == GIMP_VIEW_BG_CHECKS)
{
if (! renderer->priv->pattern)
{
GimpRGB rgb1;
GimpRGB rgb2;
gegl_color_get_pixel ((GeglColor *) gimp_render_check_color1 (), babl_format ("R'G'B'A double"), &rgb1);
gegl_color_get_pixel ((GeglColor *) gimp_render_check_color2 (), babl_format ("R'G'B'A double"), &rgb2);
renderer->priv->pattern = gimp_cairo_checkerboard_create (cr, GIMP_CHECK_SIZE_SM, &rgb1, &rgb2);
}
}
switch (outside_bg)
{
case GIMP_VIEW_BG_CHECKS:
cairo_set_source (cr, renderer->priv->pattern);
break;
case GIMP_VIEW_BG_WHITE:
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
break;
}
cairo_paint (cr);
if (! gimp_rectangle_intersect (0, 0,
surface_width, surface_height,
temp_buf_x, temp_buf_y,
temp_buf_width, temp_buf_height,
&x, &y,
&width, &height))
{
cairo_destroy (cr);
return;
}
if (inside_bg != outside_bg &&
babl_format_has_alpha (temp_buf_format) && channel == -1)
{
cairo_rectangle (cr, x, y, width, height);
switch (inside_bg)
{
case GIMP_VIEW_BG_CHECKS:
cairo_set_source (cr, renderer->priv->pattern);
break;
case GIMP_VIEW_BG_WHITE:
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
break;
}
cairo_fill (cr);
}
if (babl_format_has_alpha (temp_buf_format) && channel == -1)
{
GimpColorTransform *transform;
GeglBuffer *src_buffer;
GeglBuffer *dest_buffer;
cairo_surface_t *alpha_surface;
alpha_surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
width, height);
src_buffer = gimp_temp_buf_create_buffer (temp_buf);
dest_buffer = gimp_cairo_surface_create_buffer (alpha_surface, NULL);
transform =
gimp_view_renderer_get_color_transform (renderer, widget,
gegl_buffer_get_format (src_buffer),
gegl_buffer_get_format (dest_buffer));
if (transform)
{
gimp_color_transform_process_buffer (transform,
src_buffer,
GEGL_RECTANGLE (x - temp_buf_x,
y - temp_buf_y,
width, height),
dest_buffer,
GEGL_RECTANGLE (0, 0, 0, 0));
}
else
{
gimp_gegl_buffer_copy (src_buffer,
GEGL_RECTANGLE (x - temp_buf_x,
y - temp_buf_y,
width, height),
GEGL_ABYSS_NONE,
dest_buffer,
GEGL_RECTANGLE (0, 0, 0, 0));
}
g_object_unref (src_buffer);
g_object_unref (dest_buffer);
cairo_surface_mark_dirty (alpha_surface);
cairo_translate (cr, x, y);
cairo_rectangle (cr, 0, 0, width, height);
cairo_set_source_surface (cr, alpha_surface, 0, 0);
cairo_fill (cr);
cairo_surface_destroy (alpha_surface);
}
else if (channel == -1)
{
GimpColorTransform *transform;
GeglBuffer *src_buffer;
GeglBuffer *dest_buffer;
cairo_surface_flush (surface);
src_buffer = gimp_temp_buf_create_buffer (temp_buf);
dest_buffer = gimp_cairo_surface_create_buffer (surface, NULL);
transform =
gimp_view_renderer_get_color_transform (renderer, widget,
gegl_buffer_get_format (src_buffer),
gegl_buffer_get_format (dest_buffer));
if (transform)
{
gimp_color_transform_process_buffer (transform,
src_buffer,
GEGL_RECTANGLE (x - temp_buf_x,
y - temp_buf_y,
width, height),
dest_buffer,
GEGL_RECTANGLE (x, y, 0, 0));
}
else
{
gimp_gegl_buffer_copy (src_buffer,
GEGL_RECTANGLE (x - temp_buf_x,
y - temp_buf_y,
width, height),
GEGL_ABYSS_NONE,
dest_buffer,
GEGL_RECTANGLE (x, y, 0, 0));
}
g_object_unref (src_buffer);
g_object_unref (dest_buffer);
cairo_surface_mark_dirty (surface);
}
else
{
const Babl *fish;
const guchar *src;
guchar *dest;
gint dest_stride;
gint bytes;
gint rowstride;
gint i;
cairo_surface_flush (surface);
bytes = babl_format_get_bytes_per_pixel (temp_buf_format);
rowstride = temp_buf_width * bytes;
src = gimp_temp_buf_get_data (temp_buf) + ((y - temp_buf_y) * rowstride +
(x - temp_buf_x) * bytes);
dest = cairo_image_surface_get_data (surface);
dest_stride = cairo_image_surface_get_stride (surface);
dest += y * dest_stride + x * 4;
fish = babl_fish (temp_buf_format,
babl_format ("cairo-RGB24"));
for (i = y; i < (y + height); i++)
{
const guchar *s = src;
guchar *d = dest;
gint j;
for (j = x; j < (x + width); j++, d += 4, s += bytes)
{
if (bytes > 2)
{
guchar pixel[4] = { s[channel], s[channel], s[channel], 255 };
babl_process (fish, pixel, d, 1);
}
else
{
guchar pixel[2] = { s[channel], 255 };
babl_process (fish, pixel, d, 1);
}
}
src += rowstride;
dest += dest_stride;
}
cairo_surface_mark_dirty (surface);
}
cairo_destroy (cr);
}
/* This function creates a background pattern from a named icon
* if renderer->priv->bg_icon_name is set.
*/
static cairo_pattern_t *
gimp_view_renderer_create_background (GimpViewRenderer *renderer,
GtkWidget *widget)
{
cairo_pattern_t *pattern = NULL;
if (renderer->priv->bg_icon_name)
{
cairo_surface_t *surface;
GdkPixbuf *pixbuf;
pixbuf = gimp_widget_load_icon (widget,
renderer->priv->bg_icon_name,
64);
surface = gimp_cairo_surface_create_from_pixbuf (pixbuf);
g_object_unref (pixbuf);
pattern = cairo_pattern_create_for_surface (surface);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
cairo_surface_destroy (surface);
}
return pattern;
}
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