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24b86508e593b51e94162373402f0230959d2f91
gimp/app/core/gimpdrawable-preview.c
Ell fbaf3c4290 app: render layer-group preview in chunks 
In gimp_drawable_get_sub_preview_async(), when the drawable buffer
has a validate handler (i.e., when it's a group layer), use a chunk
iterator to validate the buffer in chunks, where each chunk is
validated in a separate invocation of the async function.  This
prevents validation from blocking the main thread for too long when
the buffer is not already fully validated.

(cherry picked from commit 64bf77aed8)
2020-03-14 16:06:13 +02:00

493 lines
15 KiB
C
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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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 <cairo.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "core-types.h"
#include "config/gimpcoreconfig.h"
#include "gegl/gimp-babl.h"
#include "gegl/gimp-gegl-loops.h"
#include "gegl/gimptilehandlervalidate.h"
#include "gimp.h"
#include "gimp-parallel.h"
#include "gimp-utils.h"
#include "gimpasync.h"
#include "gimpchannel.h"
#include "gimpchunkiterator.h"
#include "gimpimage.h"
#include "gimpimage-color-profile.h"
#include "gimpdrawable-preview.h"
#include "gimpdrawable-private.h"
#include "gimplayer.h"
#include "gimptempbuf.h"
#include "gimp-priorities.h"
typedef struct
{
const Babl *format;
GeglBuffer *buffer;
GeglRectangle rect;
gdouble scale;
GimpChunkIterator *iter;
} SubPreviewData;
/* local function prototypes */
static SubPreviewData * sub_preview_data_new (const Babl *format,
GeglBuffer *buffer,
const GeglRectangle *rect,
gdouble scale);
static void sub_preview_data_free (SubPreviewData *data);
/* private functions */
static SubPreviewData *
sub_preview_data_new (const Babl *format,
GeglBuffer *buffer,
const GeglRectangle *rect,
gdouble scale)
{
SubPreviewData *data = g_slice_new (SubPreviewData);
data->format = format;
data->buffer = g_object_ref (buffer);
data->rect = *rect;
data->scale = scale;
data->iter = NULL;
return data;
}
static void
sub_preview_data_free (SubPreviewData *data)
{
g_object_unref (data->buffer);
if (data->iter)
gimp_chunk_iterator_stop (data->iter, TRUE);
g_slice_free (SubPreviewData, data);
}
/* public functions */
GimpTempBuf *
gimp_drawable_get_new_preview (GimpViewable *viewable,
GimpContext *context,
gint width,
gint height)
{
GimpItem *item = GIMP_ITEM (viewable);
GimpImage *image = gimp_item_get_image (item);
if (! image->gimp->config->layer_previews)
return NULL;
return gimp_drawable_get_sub_preview (GIMP_DRAWABLE (viewable),
0, 0,
gimp_item_get_width (item),
gimp_item_get_height (item),
width,
height);
}
GdkPixbuf *
gimp_drawable_get_new_pixbuf (GimpViewable *viewable,
GimpContext *context,
gint width,
gint height)
{
GimpItem *item = GIMP_ITEM (viewable);
GimpImage *image = gimp_item_get_image (item);
if (! image->gimp->config->layer_previews)
return NULL;
return gimp_drawable_get_sub_pixbuf (GIMP_DRAWABLE (viewable),
0, 0,
gimp_item_get_width (item),
gimp_item_get_height (item),
width,
height);
}
const Babl *
gimp_drawable_get_preview_format (GimpDrawable *drawable)
{
gboolean alpha;
gboolean linear;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
alpha = gimp_drawable_has_alpha (drawable);
linear = gimp_drawable_get_linear (drawable);
switch (gimp_drawable_get_base_type (drawable))
{
case GIMP_GRAY:
return gimp_babl_format (GIMP_GRAY,
gimp_babl_precision (GIMP_COMPONENT_TYPE_U8,
linear),
alpha);
case GIMP_RGB:
return gimp_babl_format (GIMP_RGB,
gimp_babl_precision (GIMP_COMPONENT_TYPE_U8,
linear),
alpha);
case GIMP_INDEXED:
if (alpha)
return babl_format ("R'G'B'A u8");
else
return babl_format ("R'G'B' u8");
}
g_return_val_if_reached (NULL);
}
GimpTempBuf *
gimp_drawable_get_sub_preview (GimpDrawable *drawable,
gint src_x,
gint src_y,
gint src_width,
gint src_height,
gint dest_width,
gint dest_height)
{
GimpItem *item;
GimpImage *image;
GeglBuffer *buffer;
GimpTempBuf *preview;
gdouble scale;
gint scaled_x;
gint scaled_y;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
g_return_val_if_fail (src_x >= 0, NULL);
g_return_val_if_fail (src_y >= 0, NULL);
g_return_val_if_fail (src_width > 0, NULL);
g_return_val_if_fail (src_height > 0, NULL);
g_return_val_if_fail (dest_width > 0, NULL);
g_return_val_if_fail (dest_height > 0, NULL);
item = GIMP_ITEM (drawable);
g_return_val_if_fail ((src_x + src_width) <= gimp_item_get_width (item), NULL);
g_return_val_if_fail ((src_y + src_height) <= gimp_item_get_height (item), NULL);
image = gimp_item_get_image (item);
if (! image->gimp->config->layer_previews)
return NULL;
buffer = gimp_drawable_get_buffer (drawable);
preview = gimp_temp_buf_new (dest_width, dest_height,
gimp_drawable_get_preview_format (drawable));
scale = MIN ((gdouble) dest_width / (gdouble) src_width,
(gdouble) dest_height / (gdouble) src_height);
scaled_x = RINT ((gdouble) src_x * scale);
scaled_y = RINT ((gdouble) src_y * scale);
gegl_buffer_get (buffer,
GEGL_RECTANGLE (scaled_x, scaled_y, dest_width, dest_height),
scale,
gimp_temp_buf_get_format (preview),
gimp_temp_buf_get_data (preview),
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_CLAMP);
return preview;
}
GdkPixbuf *
gimp_drawable_get_sub_pixbuf (GimpDrawable *drawable,
gint src_x,
gint src_y,
gint src_width,
gint src_height,
gint dest_width,
gint dest_height)
{
GimpItem *item;
GimpImage *image;
GeglBuffer *buffer;
GdkPixbuf *pixbuf;
gdouble scale;
gint scaled_x;
gint scaled_y;
GimpColorTransform *transform;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
g_return_val_if_fail (src_x >= 0, NULL);
g_return_val_if_fail (src_y >= 0, NULL);
g_return_val_if_fail (src_width > 0, NULL);
g_return_val_if_fail (src_height > 0, NULL);
g_return_val_if_fail (dest_width > 0, NULL);
g_return_val_if_fail (dest_height > 0, NULL);
item = GIMP_ITEM (drawable);
g_return_val_if_fail ((src_x + src_width) <= gimp_item_get_width (item), NULL);
g_return_val_if_fail ((src_y + src_height) <= gimp_item_get_height (item), NULL);
image = gimp_item_get_image (item);
if (! image->gimp->config->layer_previews)
return NULL;
buffer = gimp_drawable_get_buffer (drawable);
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
dest_width, dest_height);
scale = MIN ((gdouble) dest_width / (gdouble) src_width,
(gdouble) dest_height / (gdouble) src_height);
scaled_x = RINT ((gdouble) src_x * scale);
scaled_y = RINT ((gdouble) src_y * scale);
transform = gimp_image_get_color_transform_to_srgb_u8 (image);
if (transform)
{
GimpTempBuf *temp_buf;
GeglBuffer *src_buf;
GeglBuffer *dest_buf;
temp_buf = gimp_temp_buf_new (dest_width, dest_height,
gimp_drawable_get_format (drawable));
gegl_buffer_get (buffer,
GEGL_RECTANGLE (scaled_x, scaled_y,
dest_width, dest_height),
scale,
gimp_temp_buf_get_format (temp_buf),
gimp_temp_buf_get_data (temp_buf),
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_CLAMP);
src_buf = gimp_temp_buf_create_buffer (temp_buf);
dest_buf = gimp_pixbuf_create_buffer (pixbuf);
gimp_temp_buf_unref (temp_buf);
gimp_color_transform_process_buffer (transform,
src_buf,
GEGL_RECTANGLE (0, 0,
dest_width, dest_height),
dest_buf,
GEGL_RECTANGLE (0, 0, 0, 0));
g_object_unref (src_buf);
g_object_unref (dest_buf);
}
else
{
gegl_buffer_get (buffer,
GEGL_RECTANGLE (scaled_x, scaled_y,
dest_width, dest_height),
scale,
gimp_pixbuf_get_format (pixbuf),
gdk_pixbuf_get_pixels (pixbuf),
gdk_pixbuf_get_rowstride (pixbuf),
GEGL_ABYSS_CLAMP);
}
return pixbuf;
}
static void
gimp_drawable_get_sub_preview_async_func (GimpAsync *async,
SubPreviewData *data)
{
GimpTempBuf *preview;
GimpTileHandlerValidate *validate;
preview = gimp_temp_buf_new (data->rect.width, data->rect.height,
data->format);
validate = gimp_tile_handler_validate_get_assigned (data->buffer);
if (validate)
{
if (! data->iter)
{
cairo_region_t *region;
cairo_rectangle_int_t rect;
rect.x = floor (data->rect.x / data->scale);
rect.y = floor (data->rect.y / data->scale);
rect.width = ceil ((data->rect.x + data->rect.width) /
data->scale) - rect.x;
rect.height = ceil ((data->rect.x + data->rect.height) /
data->scale) - rect.y;
region = cairo_region_copy (validate->dirty_region);
cairo_region_intersect_rectangle (region, &rect);
data->iter = gimp_chunk_iterator_new (region);
}
if (gimp_chunk_iterator_next (data->iter))
{
GeglRectangle rect;
gimp_tile_handler_validate_begin_validate (validate);
while (gimp_chunk_iterator_get_rect (data->iter, &rect))
{
gimp_tile_handler_validate_validate (validate,
data->buffer, &rect,
FALSE, FALSE);
}
gimp_tile_handler_validate_end_validate (validate);
return;
}
data->iter = NULL;
}
gegl_buffer_get (data->buffer, &data->rect, data->scale,
gimp_temp_buf_get_format (preview),
gimp_temp_buf_get_data (preview),
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_CLAMP);
sub_preview_data_free (data);
gimp_async_finish_full (async,
preview,
(GDestroyNotify) gimp_temp_buf_unref);
}
GimpAsync *
gimp_drawable_get_sub_preview_async (GimpDrawable *drawable,
gint src_x,
gint src_y,
gint src_width,
gint src_height,
gint dest_width,
gint dest_height)
{
GimpItem *item;
GimpImage *image;
GeglBuffer *buffer;
SubPreviewData *data;
gdouble scale;
gint scaled_x;
gint scaled_y;
static gint no_async_drawable_previews = -1;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
g_return_val_if_fail (src_x >= 0, NULL);
g_return_val_if_fail (src_y >= 0, NULL);
g_return_val_if_fail (src_width > 0, NULL);
g_return_val_if_fail (src_height > 0, NULL);
g_return_val_if_fail (dest_width > 0, NULL);
g_return_val_if_fail (dest_height > 0, NULL);
item = GIMP_ITEM (drawable);
g_return_val_if_fail ((src_x + src_width) <= gimp_item_get_width (item), NULL);
g_return_val_if_fail ((src_y + src_height) <= gimp_item_get_height (item), NULL);
image = gimp_item_get_image (item);
if (! image->gimp->config->layer_previews)
return NULL;
buffer = gimp_drawable_get_buffer (drawable);
if (no_async_drawable_previews < 0)
{
no_async_drawable_previews =
(g_getenv ("GIMP_NO_ASYNC_DRAWABLE_PREVIEWS") != NULL);
}
if (no_async_drawable_previews)
{
GimpAsync *async = gimp_async_new ();
gimp_async_finish_full (async,
gimp_drawable_get_sub_preview (drawable,
src_x,
src_y,
src_width,
src_height,
dest_width,
dest_height),
(GDestroyNotify) gimp_temp_buf_unref);
return async;
}
scale = MIN ((gdouble) dest_width / (gdouble) src_width,
(gdouble) dest_height / (gdouble) src_height);
scaled_x = RINT ((gdouble) src_x * scale);
scaled_y = RINT ((gdouble) src_y * scale);
data = sub_preview_data_new (
gimp_drawable_get_preview_format (drawable),
buffer,
GEGL_RECTANGLE (scaled_x, scaled_y, dest_width, dest_height),
scale);
if (gimp_tile_handler_validate_get_assigned (buffer))
{
return gimp_idle_run_async_full (
GIMP_PRIORITY_VIEWABLE_IDLE,
(GimpRunAsyncFunc) gimp_drawable_get_sub_preview_async_func,
data,
(GDestroyNotify) sub_preview_data_free);
}
else
{
return gimp_parallel_run_async_full (
+1,
(GimpRunAsyncFunc) gimp_drawable_get_sub_preview_async_func,
data,
(GDestroyNotify) sub_preview_data_free);
}
}
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