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Gimp/app/widgets/gimpviewrenderer.c
Jehan 926d5c6daa app, libgimp*, plug-ins: fix previous commit and add gimp_cairo_surface_get_buffer(). 
The previous commit was not taking into account usages of
gimp_cairo_surface_create_buffer(), other than the text layer rendering
usage, as it was focused on fixing #14970.

In particular, in other pieces of code, we were using a temporary
GeglBuffer as a way to edit the original Cairo surface but the syncing
back was not happening anymore. So previous commit was breaking all
thumbnails of layers or images, as well as PDF export for all raster
layers.

After some thought, I decided to implement a new function
gimp_cairo_surface_get_buffer() which would do what
gimp_cairo_surface_create_buffer() was doing, but adding a boolean flag
to declare whether or not we were expecting to sync back into the Cairo
surface's data. After all, when we don't need to sync back, better avoid
the useless work of copying possibly huge data.

I also added back the possibility of returning a linear-memory backed
buffer, after some discussion with pippin. Because for very small
surfaces, and if we are indeed looking to sync back into the source
Cairo surface, the advantages of using a linear buffer may still be
worth it, even though it's not true for the general case (where tiled
buffers will be much more efficient). I used 4096 (64^2 because our
current tile dimensions are 64 right now in GIMP), though this number is
kinda random and doesn't matter too much (it doesn't have to be the
square of the tile's width or height). I don't put any info about this
in the new function's documentation because developers should not have
any expectations on the type of buffer they get (only whether or not it
will sync back to the source).

As a consequence of all this, gimp_cairo_surface_create_buffer() has
been deprecated as of GIMP 3.2, though it will still work the same. The
new function will be recommended as a replacement.
2025-11-08 20:34:55 +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 "config/gimpguiconfig.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
{
GimpViewBorderType border_type;
GeglColor *border_color;
cairo_pattern_t *pattern;
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);
static void gimp_view_renderer_redraw (GimpGuiConfig *config,
const GParamSpec *pspec,
GimpViewRenderer *renderer);
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 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->default_bg = GIMP_VIEW_BG_STYLE;
klass->follow_theme_bg = GIMP_VIEW_BG_STYLE;
klass->frame = NULL;
klass->frame_left = 0;
klass->frame_right = 0;
klass->frame_top = 0;
klass->frame_bottom = 0;
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;
}
static void
gimp_view_renderer_init (GimpViewRenderer *renderer)
{
renderer->priv = gimp_view_renderer_get_instance_private (renderer);
renderer->dot_for_dot = TRUE;
renderer->surface_bg = GIMP_VIEW_BG_STYLE;
renderer->size = -1;
renderer->priv->border_type = GIMP_VIEW_BORDER_STYLE_FG;
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);
g_clear_object (&renderer->priv->border_color);
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->surface, cairo_surface_destroy);
g_clear_pointer (&renderer->priv->pattern, cairo_pattern_destroy);
g_clear_pointer (&renderer->priv->bg_icon_name, g_free);
g_clear_object (&renderer->priv->border_color);
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)
{
if (renderer->context)
{
g_signal_handlers_disconnect_by_func (renderer->context->gimp->config,
G_CALLBACK (gimp_view_renderer_redraw),
renderer);
}
GIMP_VIEW_RENDERER_GET_CLASS (renderer)->set_context (renderer, context);
if (renderer->context)
{
GimpViewRendererClass *klass = GIMP_VIEW_RENDERER_GET_CLASS (renderer);
GimpCoreConfig *config = renderer->context->gimp->config;
g_signal_connect_object (config,
"notify::viewables-follow-theme",
G_CALLBACK (gimp_view_renderer_redraw),
renderer, 0);
g_signal_connect_object (config,
"notify::theme-color-scheme",
G_CALLBACK (gimp_view_renderer_redraw),
renderer, 0);
if (GIMP_GUI_CONFIG (config)->viewables_follow_theme)
renderer->surface_bg = klass->follow_theme_bg;
else
renderer->surface_bg = klass->default_bg;
}
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);
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)
{
GeglColor *border_color = NULL;
g_return_if_fail (GIMP_IS_VIEW_RENDERER (renderer));
renderer->priv->border_type = border_type;
switch (border_type)
{
case GIMP_VIEW_BORDER_BLACK:
border_color = gegl_color_new ("black");
break;
case GIMP_VIEW_BORDER_WHITE:
border_color = gegl_color_new ("white");
break;
case GIMP_VIEW_BORDER_GREEN:
border_color = gegl_color_new ("green");
gegl_color_set_rgba (border_color, 0.0, 0.94, 0.0, 1.0);
break;
case GIMP_VIEW_BORDER_RED:
border_color = gegl_color_new ("red");
break;
case GIMP_VIEW_BORDER_STYLE_FG:
/* get later when we have a widget */
break;
case GIMP_VIEW_BORDER_STYLE_BG:
border_color = gegl_color_new ("transparent");
break;
}
g_set_object (&renderer->priv->border_color, border_color);
gimp_view_renderer_update_idle (renderer);
}
GimpViewBorderType
gimp_view_renderer_get_border_type (GimpViewRenderer *renderer)
{
g_return_val_if_fail (GIMP_IS_VIEW_RENDERER (renderer),
GIMP_VIEW_BORDER_STYLE_FG);
return renderer->priv->border_type;
}
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,
gtk_widget_get_scale_factor (widget));
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)
{
GeglColor *color;
gint width = renderer->width + renderer->border_width;
gint height = renderer->height + renderer->border_width;
gdouble x, y;
if (renderer->priv->border_color)
color = g_object_ref (renderer->priv->border_color);
else
color = gimp_get_style_color (widget, GTK_STYLE_PROPERTY_COLOR);
cairo_set_line_width (cr, renderer->border_width);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
gimp_cairo_set_source_color (cr, color, NULL, FALSE, widget);
g_object_unref (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->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);
}
else
{
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);
switch (renderer->surface_bg)
{
case GIMP_VIEW_BG_CHECKS:
if (! renderer->priv->pattern)
{
const GeglColor *rgb1 = gimp_render_check_color1 ();
const GeglColor *rgb2 = gimp_render_check_color2 ();
renderer->priv->pattern =
gimp_cairo_checkerboard_create (cr, GIMP_CHECK_SIZE_SM,
rgb1, rgb2);
}
cairo_set_source (cr, renderer->priv->pattern);
cairo_fill (cr);
break;
case GIMP_VIEW_BG_WHITE:
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
cairo_fill (cr);
break;
case GIMP_VIEW_BG_STYLE:
break;
}
cairo_translate (cr, -offset_x, -offset_y);
}
if (renderer->surface)
{
gdouble scale_x;
gdouble scale_y;
gint width;
gint height;
gint x, y;
width = cairo_image_surface_get_width (renderer->surface);
height = cairo_image_surface_get_height (renderer->surface);
cairo_surface_get_device_scale (renderer->surface, &scale_x, &scale_y);
width /= scale_x;
height /= scale_y;
x = (available_width - width) / 2;
y = (available_height - height) / 2;
cairo_rectangle (cr, x, y, width, height);
cairo_set_source_surface (cr, renderer->surface, x, y);
cairo_fill (cr);
}
}
static void
gimp_view_renderer_real_render (GimpViewRenderer *renderer,
GtkWidget *widget)
{
GdkPixbuf *pixbuf;
GimpTempBuf *temp_buf;
const gchar *icon_name;
GeglColor *fg_color = NULL;
GimpViewBG inside_bg = GIMP_VIEW_BG_CHECKS;
GimpViewBG outside_bg = GIMP_VIEW_BG_WHITE;
gint scale_factor = gtk_widget_get_scale_factor (widget);
if (renderer->context &&
GIMP_GUI_CONFIG (renderer->context->gimp->config)->viewables_follow_theme)
{
fg_color = gimp_get_style_color (widget, GTK_STYLE_PROPERTY_COLOR);
inside_bg = GIMP_VIEW_BG_STYLE;
outside_bg = GIMP_VIEW_BG_STYLE;
}
pixbuf = gimp_viewable_get_pixbuf (renderer->viewable,
renderer->context,
renderer->width * scale_factor,
renderer->height * scale_factor,
fg_color);
if (pixbuf)
{
gimp_view_renderer_render_pixbuf (renderer, widget,
pixbuf, scale_factor);
g_clear_object (&fg_color);
return;
}
temp_buf = gimp_viewable_get_preview (renderer->viewable,
renderer->context,
renderer->width,
renderer->height,
fg_color);
if (temp_buf)
{
gimp_view_renderer_render_temp_buf_simple (renderer, widget,
temp_buf,
inside_bg,
outside_bg);
g_clear_object (&fg_color);
return;
}
icon_name = gimp_viewable_get_icon_name (renderer->viewable);
gimp_view_renderer_render_icon (renderer, widget,
icon_name, scale_factor);
g_clear_object (&fg_color);
}
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,
GimpViewBG inside_bg,
GimpViewBG outside_bg)
{
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,
inside_bg,
outside_bg);
}
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->surface, cairo_surface_destroy);
renderer->surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
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,
gint pixbuf_scale)
{
GimpColorTransform *transform;
const Babl *format;
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);
}
renderer->surface = gdk_cairo_surface_create_from_pixbuf (pixbuf,
pixbuf_scale,
NULL);
g_object_unref (pixbuf);
}
void
gimp_view_renderer_render_icon (GimpViewRenderer *renderer,
GtkWidget *widget,
const gchar *icon_name,
gint icon_scale)
{
GdkPixbuf *pixbuf;
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->surface, cairo_surface_destroy);
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 * icon_scale ||
height > renderer->height * icon_scale)
{
GdkPixbuf *scaled_pixbuf;
gimp_viewable_calc_preview_size (width, height,
renderer->width * icon_scale,
renderer->height * icon_scale,
TRUE, 1.0, 1.0,
&width, &height,
NULL);
scaled_pixbuf = gdk_pixbuf_scale_simple (pixbuf,
width * icon_scale,
height * icon_scale,
GDK_INTERP_BILINEAR);
g_object_unref (pixbuf);
pixbuf = scaled_pixbuf;
}
renderer->surface = gdk_cairo_surface_create_from_pixbuf (pixbuf,
icon_scale,
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);
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
if (outside_bg == GIMP_VIEW_BG_CHECKS ||
inside_bg == GIMP_VIEW_BG_CHECKS)
{
if (! renderer->priv->pattern)
{
const GeglColor *rgb1 = gimp_render_check_color1 ();
const GeglColor *rgb2 = gimp_render_check_color2 ();
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);
cairo_paint (cr);
break;
case GIMP_VIEW_BG_WHITE:
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
cairo_paint (cr);
break;
case GIMP_VIEW_BG_STYLE:
break;
}
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);
cairo_fill (cr);
break;
case GIMP_VIEW_BG_WHITE:
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
cairo_fill (cr);
break;
case GIMP_VIEW_BG_STYLE:
break;
}
}
if (channel == -1)
{
GimpColorTransform *transform;
GeglBuffer *src_buffer;
GeglBuffer *dest_buffer;
cairo_surface_t *tmp_surface;
tmp_surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
width, height);
src_buffer = gimp_temp_buf_create_buffer (temp_buf);
dest_buffer = gimp_cairo_surface_get_buffer (tmp_surface, NULL, TRUE);
transform =
gimp_view_renderer_get_color_transform (renderer, widget,
gegl_buffer_get_format (src_buffer),
gegl_buffer_get_format (dest_buffer));
gegl_buffer_freeze_changed (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));
}
gegl_buffer_thaw_changed (dest_buffer);
g_object_unref (src_buffer);
g_object_unref (dest_buffer);
cairo_surface_mark_dirty (tmp_surface);
cairo_translate (cr, x, y);
cairo_rectangle (cr, 0, 0, width, height);
cairo_set_source_surface (cr, tmp_surface, 0, 0);
cairo_fill (cr);
cairo_surface_destroy (tmp_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 ("R~G~B~ u8"));
for (i = 0; i < height; i++)
{
guchar line[width * 3];
const guchar *s = line;
guint32 *d = (guint32*) dest;
gint j;
babl_process (fish, src, line, width);
for (j = 0; j < width; j++)
{
*d = s[channel] | s[channel] << 8 | s[channel] << 16;
s += 3;
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;
}
static void
gimp_view_renderer_redraw (GimpGuiConfig *config,
const GParamSpec *pspec,
GimpViewRenderer *renderer)
{
GimpViewRendererClass *klass = GIMP_VIEW_RENDERER_GET_CLASS (renderer);
if (config->viewables_follow_theme)
renderer->surface_bg = klass->follow_theme_bg;
else
renderer->surface_bg = klass->default_bg;
gimp_view_renderer_invalidate (renderer);
gimp_view_renderer_update (renderer);
}
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