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gimp/app/core/gimpprojection.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 <stdlib.h>
#include <string.h>
#include <cairo.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpmath/gimpmath.h"
#include "core-types.h"
#include "gegl/gimp-babl.h"
#include "gegl/gimp-gegl-loops.h"
#include "gegl/gimp-gegl-utils.h"
#include "gimp.h"
#include "gimp-memsize.h"
#include "gimpimage.h"
#include "gimpmarshal.h"
#include "gimppickable.h"
#include "gimpprojectable.h"
#include "gimpprojection.h"
#include "gimptilehandlerprojectable.h"
#include "gimp-log.h"
#include "gimp-priorities.h"
/* whether to use adaptive render-chunk size */
static gboolean GIMP_PROJECTION_ADAPTIVE_CHUNK_SIZE = TRUE;
/* chunk size for one iteration of the chunk renderer, when the use
* of adaptive chunk size is disabled
*/
static gint GIMP_PROJECTION_CHUNK_WIDTH = 256;
static gint GIMP_PROJECTION_CHUNK_HEIGHT = 128;
/* the min/max adaptive chunk size */
#define GIMP_PROJECTION_CHUNK_MIN_WIDTH 128
#define GIMP_PROJECTION_CHUNK_MIN_HEIGHT 128
#define GIMP_PROJECTION_CHUNK_MAX_WIDTH 2048
#define GIMP_PROJECTION_CHUNK_MAX_HEIGHT 2048
/* the minimal number of processed pixels on the current frame,
* above which we calculate a new target pixel count to render
* on the next frame
*/
#define GIMP_PROJECTION_MIN_PIXELS_PER_UPDATE 1024
/* chunk size for area updates */
static gint GIMP_PROJECTION_UPDATE_CHUNK_WIDTH = 32;
static gint GIMP_PROJECTION_UPDATE_CHUNK_HEIGHT = 32;
/* how much time, in seconds, do we allow chunk rendering to take,
* aiming for 15fps
*/
static gdouble GIMP_PROJECTION_CHUNK_TIME = 0.0666;
enum
{
UPDATE,
RENDERED,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_BUFFER
};
typedef struct _GimpProjectionChunkRender GimpProjectionChunkRender;
struct _GimpProjectionChunkRender
{
guint idle_id;
gint x;
gint y;
gint width;
gint height;
gint work_x;
gint work_y;
gint work_height;
gint n_pixels;
gint target_n_pixels;
cairo_region_t *update_region; /* flushed update region */
};
struct _GimpProjectionPrivate
{
GimpProjectable *projectable;
GeglBuffer *buffer;
GimpTileHandlerValidate *validate_handler;
gint priority;
cairo_region_t *update_region;
GimpProjectionChunkRender chunk_render;
cairo_rectangle_int_t priority_rect;
gboolean invalidate_preview;
};
/* local function prototypes */
static void gimp_projection_pickable_iface_init (GimpPickableInterface *iface);
static void gimp_projection_finalize (GObject *object);
static void gimp_projection_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_projection_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static gint64 gimp_projection_get_memsize (GimpObject *object,
gint64 *gui_size);
static void gimp_projection_pickable_flush (GimpPickable *pickable);
static GimpImage * gimp_projection_get_image (GimpPickable *pickable);
static const Babl * gimp_projection_get_format (GimpPickable *pickable);
static GeglBuffer * gimp_projection_get_buffer (GimpPickable *pickable);
static gboolean gimp_projection_get_pixel_at (GimpPickable *pickable,
gint x,
gint y,
const Babl *format,
gpointer pixel);
static gdouble gimp_projection_get_opacity_at (GimpPickable *pickable,
gint x,
gint y);
static void gimp_projection_get_pixel_average (GimpPickable *pickable,
const GeglRectangle *rect,
const Babl *format,
gpointer pixel);
static void gimp_projection_pixel_to_srgb (GimpPickable *pickable,
const Babl *format,
gpointer pixel,
GimpRGB *color);
static void gimp_projection_srgb_to_pixel (GimpPickable *pickable,
const GimpRGB *color,
const Babl *format,
gpointer pixel);
static void gimp_projection_allocate_buffer (GimpProjection *proj);
static void gimp_projection_free_buffer (GimpProjection *proj);
static void gimp_projection_add_update_area (GimpProjection *proj,
gint x,
gint y,
gint w,
gint h);
static void gimp_projection_flush_whenever (GimpProjection *proj,
gboolean now,
gboolean direct);
static void gimp_projection_chunk_render_start (GimpProjection *proj);
static void gimp_projection_chunk_render_stop (GimpProjection *proj);
static gboolean gimp_projection_chunk_render_callback (gpointer data);
static void gimp_projection_chunk_render_init (GimpProjection *proj);
static void gimp_projection_chunk_render_reinit (GimpProjection *proj);
static void gimp_projection_chunk_render_merge (GimpProjection *proj);
static gboolean gimp_projection_chunk_render_iteration(GimpProjection *proj,
gboolean chunk);
static gboolean gimp_projection_chunk_render_next_area(GimpProjection *proj);
static void gimp_projection_chunk_render_set_area (GimpProjection *proj,
gint x,
gint y,
gint w,
gint h);
static void gimp_projection_paint_area (GimpProjection *proj,
gboolean now,
gint x,
gint y,
gint w,
gint h);
static void gimp_projection_projectable_invalidate(GimpProjectable *projectable,
gint x,
gint y,
gint w,
gint h,
GimpProjection *proj);
static void gimp_projection_projectable_flush (GimpProjectable *projectable,
gboolean invalidate_preview,
GimpProjection *proj);
static void
gimp_projection_projectable_structure_changed (GimpProjectable *projectable,
GimpProjection *proj);
static void gimp_projection_projectable_bounds_changed (GimpProjectable *projectable,
gint old_x,
gint old_y,
gint old_w,
gint old_h,
GimpProjection *proj);
static gint gimp_projection_round_chunk_size (gdouble size,
gboolean toward_zero);
static gint gimp_projection_round_chunk_width (gdouble width);
static gint gimp_projection_round_chunk_height (gdouble height);
G_DEFINE_TYPE_WITH_CODE (GimpProjection, gimp_projection, GIMP_TYPE_OBJECT,
G_ADD_PRIVATE (GimpProjection)
G_IMPLEMENT_INTERFACE (GIMP_TYPE_PICKABLE,
gimp_projection_pickable_iface_init))
#define parent_class gimp_projection_parent_class
static guint projection_signals[LAST_SIGNAL] = { 0 };
static void
gimp_projection_class_init (GimpProjectionClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
const gchar *env;
projection_signals[UPDATE] =
g_signal_new ("update",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpProjectionClass, update),
NULL, NULL,
gimp_marshal_VOID__BOOLEAN_INT_INT_INT_INT,
G_TYPE_NONE, 5,
G_TYPE_BOOLEAN,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT);
projection_signals[RENDERED] =
g_signal_new ("rendered",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GimpProjectionClass, rendered),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
object_class->finalize = gimp_projection_finalize;
object_class->set_property = gimp_projection_set_property;
object_class->get_property = gimp_projection_get_property;
gimp_object_class->get_memsize = gimp_projection_get_memsize;
g_object_class_override_property (object_class, PROP_BUFFER, "buffer");
if (g_getenv ("GIMP_NO_ADAPTIVE_CHUNK_SIZE"))
GIMP_PROJECTION_ADAPTIVE_CHUNK_SIZE = FALSE;
env = g_getenv ("GIMP_DISPLAY_RENDER_BUF_SIZE");
if (env)
{
gint width = atoi (env);
gint height = width;
env = strchr (env, 'x');
if (env)
height = atoi (env + 1);
if (width > 0 && width <= 8192 &&
height > 0 && height <= 8192)
{
GIMP_PROJECTION_CHUNK_WIDTH = width;
GIMP_PROJECTION_CHUNK_HEIGHT = height;
}
}
}
static void
gimp_projection_init (GimpProjection *proj)
{
proj->priv = gimp_projection_get_instance_private (proj);
}
static void
gimp_projection_pickable_iface_init (GimpPickableInterface *iface)
{
iface->flush = gimp_projection_pickable_flush;
iface->get_image = gimp_projection_get_image;
iface->get_format = gimp_projection_get_format;
iface->get_format_with_alpha = gimp_projection_get_format; /* sic */
iface->get_buffer = gimp_projection_get_buffer;
iface->get_pixel_at = gimp_projection_get_pixel_at;
iface->get_opacity_at = gimp_projection_get_opacity_at;
iface->get_pixel_average = gimp_projection_get_pixel_average;
iface->pixel_to_srgb = gimp_projection_pixel_to_srgb;
iface->srgb_to_pixel = gimp_projection_srgb_to_pixel;
}
static void
gimp_projection_finalize (GObject *object)
{
GimpProjection *proj = GIMP_PROJECTION (object);
gimp_projection_free_buffer (proj);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_projection_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
switch (property_id)
{
case PROP_BUFFER:
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_projection_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpProjection *projection = GIMP_PROJECTION (object);
switch (property_id)
{
case PROP_BUFFER:
g_value_set_object (value, projection->priv->buffer);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gint64
gimp_projection_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpProjection *projection = GIMP_PROJECTION (object);
gint64 memsize = 0;
memsize += gimp_gegl_pyramid_get_memsize (projection->priv->buffer);
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
/**
* gimp_projection_estimate_memsize:
* @type: the projectable's base type
* @component_type: the projectable's component type
* @width: projection width
* @height: projection height
*
* Calculates a rough estimate of the memory that is required for the
* projection of an image with the given @width and @height.
*
* Return value: a rough estimate of the memory requirements.
**/
gint64
gimp_projection_estimate_memsize (GimpImageBaseType type,
GimpComponentType component_type,
gint width,
gint height)
{
const Babl *format;
gint64 bytes;
if (type == GIMP_INDEXED)
type = GIMP_RGB;
format = gimp_babl_format (type,
gimp_babl_precision (component_type, FALSE),
TRUE, NULL);
bytes = babl_format_get_bytes_per_pixel (format);
/* The pyramid levels constitute a geometric sum with a ratio of 1/4. */
return bytes * (gint64) width * (gint64) height * 1.33;
}
static void
gimp_projection_pickable_flush (GimpPickable *pickable)
{
GimpProjection *proj = GIMP_PROJECTION (pickable);
/* create the buffer if it doesn't exist */
gimp_projection_get_buffer (pickable);
gimp_projection_finish_draw (proj);
gimp_projection_flush_now (proj, FALSE);
if (proj->priv->invalidate_preview)
{
/* invalidate the preview here since it is constructed from
* the projection
*/
proj->priv->invalidate_preview = FALSE;
gimp_projectable_invalidate_preview (proj->priv->projectable);
}
}
static GimpImage *
gimp_projection_get_image (GimpPickable *pickable)
{
GimpProjection *proj = GIMP_PROJECTION (pickable);
return gimp_projectable_get_image (proj->priv->projectable);
}
static const Babl *
gimp_projection_get_format (GimpPickable *pickable)
{
GimpProjection *proj = GIMP_PROJECTION (pickable);
return gimp_projectable_get_format (proj->priv->projectable);
}
static GeglBuffer *
gimp_projection_get_buffer (GimpPickable *pickable)
{
GimpProjection *proj = GIMP_PROJECTION (pickable);
if (! proj->priv->buffer)
{
gint width;
gint height;
gimp_projectable_get_size (proj->priv->projectable, &width, &height);
gimp_projection_allocate_buffer (proj);
/* This used to call gimp_tile_handler_validate_invalidate()
* which forced the entire projection to be constructed in one
* go for new images, causing a potentially huge delay. Now we
* initially validate stuff the normal way, which makes the
* image appear incrementally, but it keeps everything
* responsive.
*/
gimp_projection_add_update_area (proj, 0, 0, width, height);
proj->priv->invalidate_preview = TRUE;
gimp_projection_flush (proj);
}
return proj->priv->buffer;
}
static gboolean
gimp_projection_get_pixel_at (GimpPickable *pickable,
gint x,
gint y,
const Babl *format,
gpointer pixel)
{
GeglBuffer *buffer = gimp_projection_get_buffer (pickable);
if (x < 0 ||
y < 0 ||
x >= gegl_buffer_get_width (buffer) ||
y >= gegl_buffer_get_height (buffer))
return FALSE;
gegl_buffer_sample (buffer, x, y, NULL, pixel, format,
GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
return TRUE;
}
static gdouble
gimp_projection_get_opacity_at (GimpPickable *pickable,
gint x,
gint y)
{
return GIMP_OPACITY_OPAQUE;
}
static void
gimp_projection_get_pixel_average (GimpPickable *pickable,
const GeglRectangle *rect,
const Babl *format,
gpointer pixel)
{
GeglBuffer *buffer = gimp_projection_get_buffer (pickable);
return gimp_gegl_average_color (buffer, rect, TRUE, GEGL_ABYSS_NONE, format,
pixel);
}
static void
gimp_projection_pixel_to_srgb (GimpPickable *pickable,
const Babl *format,
gpointer pixel,
GimpRGB *color)
{
GimpProjection *proj = GIMP_PROJECTION (pickable);
GimpImage *image = gimp_projectable_get_image (proj->priv->projectable);
gimp_pickable_pixel_to_srgb (GIMP_PICKABLE (image), format, pixel, color);
}
static void
gimp_projection_srgb_to_pixel (GimpPickable *pickable,
const GimpRGB *color,
const Babl *format,
gpointer pixel)
{
GimpProjection *proj = GIMP_PROJECTION (pickable);
GimpImage *image = gimp_projectable_get_image (proj->priv->projectable);
gimp_pickable_srgb_to_pixel (GIMP_PICKABLE (image), color, format, pixel);
}
/* public functions */
GimpProjection *
gimp_projection_new (GimpProjectable *projectable)
{
GimpProjection *proj;
g_return_val_if_fail (GIMP_IS_PROJECTABLE (projectable), NULL);
proj = g_object_new (GIMP_TYPE_PROJECTION, NULL);
proj->priv->projectable = projectable;
g_signal_connect_object (projectable, "invalidate",
G_CALLBACK (gimp_projection_projectable_invalidate),
proj, 0);
g_signal_connect_object (projectable, "flush",
G_CALLBACK (gimp_projection_projectable_flush),
proj, 0);
g_signal_connect_object (projectable, "structure-changed",
G_CALLBACK (gimp_projection_projectable_structure_changed),
proj, 0);
g_signal_connect_object (projectable, "bounds-changed",
G_CALLBACK (gimp_projection_projectable_bounds_changed),
proj, 0);
return proj;
}
void
gimp_projection_set_priority (GimpProjection *proj,
gint priority)
{
g_return_if_fail (GIMP_IS_PROJECTION (proj));
proj->priv->priority = priority;
}
gint
gimp_projection_get_priority (GimpProjection *proj)
{
g_return_val_if_fail (GIMP_IS_PROJECTION (proj), 0);
return proj->priv->priority;
}
void
gimp_projection_set_priority_rect (GimpProjection *proj,
gint x,
gint y,
gint w,
gint h)
{
cairo_rectangle_int_t rect;
gint off_x, off_y;
gint width, height;
g_return_if_fail (GIMP_IS_PROJECTION (proj));
gimp_projectable_get_offset (proj->priv->projectable, &off_x, &off_y);
gimp_projectable_get_size (proj->priv->projectable, &width, &height);
/* subtract the projectable's offsets because the list of update
* areas is in tile-pyramid coordinates, but our external API is
* always in terms of image coordinates.
*/
x -= off_x;
y -= off_y;
if (gimp_rectangle_intersect (x, y, w, h,
0, 0, width, height,
&rect.x, &rect.y, &rect.width, &rect.height))
{
proj->priv->priority_rect = rect;
if (proj->priv->chunk_render.idle_id)
gimp_projection_chunk_render_reinit (proj);
}
}
void
gimp_projection_stop_rendering (GimpProjection *proj)
{
GimpProjectionChunkRender *chunk_render;
cairo_rectangle_int_t rect;
g_return_if_fail (GIMP_IS_PROJECTION (proj));
chunk_render = &proj->priv->chunk_render;
if (! chunk_render->idle_id)
return;
if (chunk_render->update_region)
{
if (proj->priv->update_region)
{
cairo_region_union (proj->priv->update_region,
chunk_render->update_region);
}
else
{
proj->priv->update_region =
cairo_region_copy (chunk_render->update_region);
}
g_clear_pointer (&chunk_render->update_region, cairo_region_destroy);
}
rect.x = chunk_render->x;
rect.y = chunk_render->work_y;
rect.width = chunk_render->width;
rect.height = chunk_render->height - (chunk_render->work_y - chunk_render->y);
/* FIXME this is too much, the entire current row */
if (proj->priv->update_region)
cairo_region_union_rectangle (proj->priv->update_region, &rect);
else
proj->priv->update_region = cairo_region_create_rectangle (&rect);
gimp_projection_chunk_render_stop (proj);
}
void
gimp_projection_flush (GimpProjection *proj)
{
g_return_if_fail (GIMP_IS_PROJECTION (proj));
/* Construct in chunks */
gimp_projection_flush_whenever (proj, FALSE, FALSE);
}
void
gimp_projection_flush_now (GimpProjection *proj,
gboolean direct)
{
g_return_if_fail (GIMP_IS_PROJECTION (proj));
/* Construct NOW */
gimp_projection_flush_whenever (proj, TRUE, direct);
}
void
gimp_projection_finish_draw (GimpProjection *proj)
{
g_return_if_fail (GIMP_IS_PROJECTION (proj));
if (proj->priv->chunk_render.idle_id)
{
gimp_projection_chunk_render_stop (proj);
gimp_tile_handler_validate_begin_validate (proj->priv->validate_handler);
while (gimp_projection_chunk_render_iteration (proj, FALSE));
gimp_tile_handler_validate_end_validate (proj->priv->validate_handler);
}
}
/* private functions */
static void
gimp_projection_allocate_buffer (GimpProjection *proj)
{
const Babl *format;
gint width;
gint height;
if (proj->priv->buffer)
return;
format = gimp_projection_get_format (GIMP_PICKABLE (proj));
gimp_projectable_get_size (proj->priv->projectable, &width, &height);
proj->priv->buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0, width, height),
format);
proj->priv->validate_handler =
GIMP_TILE_HANDLER_VALIDATE (
gimp_tile_handler_projectable_new (proj->priv->projectable));
gimp_tile_handler_validate_assign (proj->priv->validate_handler,
proj->priv->buffer);
g_object_notify (G_OBJECT (proj), "buffer");
}
static void
gimp_projection_free_buffer (GimpProjection *proj)
{
if (proj->priv->chunk_render.idle_id)
gimp_projection_chunk_render_stop (proj);
g_clear_pointer (&proj->priv->update_region, cairo_region_destroy);
g_clear_pointer (&proj->priv->chunk_render.update_region, cairo_region_destroy);
if (proj->priv->buffer)
{
gimp_tile_handler_validate_unassign (proj->priv->validate_handler,
proj->priv->buffer);
g_clear_object (&proj->priv->buffer);
g_clear_object (&proj->priv->validate_handler);
}
}
static void
gimp_projection_add_update_area (GimpProjection *proj,
gint x,
gint y,
gint w,
gint h)
{
cairo_rectangle_int_t rect;
gint width, height;
gimp_projectable_get_size (proj->priv->projectable, &width, &height);
/* align the rectangle to the UPDATE_CHUNK_WIDTH x UPDATE_CHUNK_HEIGHT grid,
* to decrease the complexity of the update area.
*/
w = ceil ((gdouble) (x + w) / GIMP_PROJECTION_UPDATE_CHUNK_WIDTH ) * GIMP_PROJECTION_UPDATE_CHUNK_WIDTH;
h = ceil ((gdouble) (y + h) / GIMP_PROJECTION_UPDATE_CHUNK_HEIGHT) * GIMP_PROJECTION_UPDATE_CHUNK_HEIGHT;
x = floor ((gdouble) x / GIMP_PROJECTION_UPDATE_CHUNK_WIDTH ) * GIMP_PROJECTION_UPDATE_CHUNK_WIDTH;
y = floor ((gdouble) y / GIMP_PROJECTION_UPDATE_CHUNK_HEIGHT) * GIMP_PROJECTION_UPDATE_CHUNK_HEIGHT;
w -= x;
h -= y;
if (gimp_rectangle_intersect (x, y, w, h,
0, 0, width, height,
&rect.x, &rect.y, &rect.width, &rect.height))
{
if (proj->priv->update_region)
cairo_region_union_rectangle (proj->priv->update_region, &rect);
else
proj->priv->update_region = cairo_region_create_rectangle (&rect);
}
}
static void
gimp_projection_flush_whenever (GimpProjection *proj,
gboolean now,
gboolean direct)
{
if (! proj->priv->buffer)
return;
if (proj->priv->update_region)
{
if (now) /* Synchronous */
{
gint n_rects = cairo_region_num_rectangles (proj->priv->update_region);
gint i;
for (i = 0; i < n_rects; i++)
{
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (proj->priv->update_region,
i, &rect);
gimp_projection_paint_area (proj,
direct,
rect.x,
rect.y,
rect.width,
rect.height);
}
}
else /* Asynchronous */
{
gimp_projection_chunk_render_init (proj);
}
/* Free the update region */
g_clear_pointer (&proj->priv->update_region, cairo_region_destroy);
}
else if (! now && proj->priv->invalidate_preview)
{
/* invalidate the preview here since it is constructed from
* the projection
*/
proj->priv->invalidate_preview = FALSE;
gimp_projectable_invalidate_preview (proj->priv->projectable);
}
}
static void
gimp_projection_chunk_render_start (GimpProjection *proj)
{
g_return_if_fail (proj->priv->chunk_render.idle_id == 0);
proj->priv->chunk_render.idle_id =
g_idle_add_full (GIMP_PRIORITY_PROJECTION_IDLE + proj->priv->priority,
gimp_projection_chunk_render_callback, proj,
NULL);
}
static void
gimp_projection_chunk_render_stop (GimpProjection *proj)
{
g_return_if_fail (proj->priv->chunk_render.idle_id != 0);
g_source_remove (proj->priv->chunk_render.idle_id);
proj->priv->chunk_render.idle_id = 0;
g_signal_emit (proj, projection_signals[RENDERED], 0);
}
static gboolean
gimp_projection_chunk_render_callback (gpointer data)
{
GimpProjection *proj = data;
GimpProjectionChunkRender *chunk_render = &proj->priv->chunk_render;
GTimer *timer = g_timer_new ();
gint chunks = 0;
gboolean retval = TRUE;
/* reset the rendered pixel count, so that we count the number of pixels
* processed during this frame
*/
chunk_render->n_pixels = 0;
gimp_tile_handler_validate_begin_validate (proj->priv->validate_handler);
do
{
if (! gimp_projection_chunk_render_iteration (proj, TRUE))
{
gimp_projection_chunk_render_stop (proj);
retval = FALSE;
break;
}
chunks++;
}
while (g_timer_elapsed (timer, NULL) < GIMP_PROJECTION_CHUNK_TIME);
gimp_tile_handler_validate_end_validate (proj->priv->validate_handler);
/* adjust the target number of pixels to be processed on the next frame,
* according to the number of pixels processed during this frame and the
* elapsed time, in order to match the desired frame rate.
*/
if (chunk_render->n_pixels >= GIMP_PROJECTION_MIN_PIXELS_PER_UPDATE)
{
chunk_render->target_n_pixels = floor (chunk_render->n_pixels *
GIMP_PROJECTION_CHUNK_TIME /
g_timer_elapsed (timer, NULL));
}
GIMP_LOG (PROJECTION, "%d chunks in %f seconds\n",
chunks, g_timer_elapsed (timer, NULL));
g_timer_destroy (timer);
return retval;
}
static void
gimp_projection_chunk_render_init (GimpProjection *proj)
{
GimpProjectionChunkRender *chunk_render = &proj->priv->chunk_render;
chunk_render->target_n_pixels = GIMP_PROJECTION_CHUNK_WIDTH *
GIMP_PROJECTION_CHUNK_HEIGHT;
gimp_projection_chunk_render_reinit (proj);
}
static void
gimp_projection_chunk_render_reinit (GimpProjection *proj)
{
GimpProjectionChunkRender *chunk_render = &proj->priv->chunk_render;
/* We need to merge the ChunkRender's and the GimpProjection's
* update_regions list to keep track of which of the updates have
* been flushed and hence need to be drawn.
*/
if (proj->priv->update_region)
{
if (chunk_render->update_region)
{
cairo_region_union (chunk_render->update_region,
proj->priv->update_region);
}
else
{
chunk_render->update_region =
cairo_region_copy (proj->priv->update_region);
}
}
/* If a chunk renderer was already running, merge the remainder of
* its unrendered area with the update_areas list, and make it start
* work on the next unrendered area in the list.
*/
if (chunk_render->idle_id)
{
gimp_projection_chunk_render_merge (proj);
gimp_projection_chunk_render_next_area (proj);
}
else
{
if (chunk_render->update_region == NULL)
{
g_warning ("%s: wanted to start chunk render with no update_region",
G_STRFUNC);
return;
}
proj->priv->chunk_render.target_n_pixels = GIMP_PROJECTION_CHUNK_WIDTH *
GIMP_PROJECTION_CHUNK_HEIGHT;
gimp_projection_chunk_render_next_area (proj);
gimp_projection_chunk_render_start (proj);
}
}
static void
gimp_projection_chunk_render_merge (GimpProjection *proj)
{
GimpProjectionChunkRender *chunk_render = &proj->priv->chunk_render;
cairo_rectangle_int_t rect;
gint work_h = 0;
if (chunk_render->work_x != chunk_render->x)
{
work_h = MIN (chunk_render->work_height,
chunk_render->y + chunk_render->height -
chunk_render->work_y);
rect.x = chunk_render->work_x;
rect.y = chunk_render->work_y;
rect.width = chunk_render->x + chunk_render->width -
chunk_render->work_x;
rect.height = work_h;
if (chunk_render->update_region)
cairo_region_union_rectangle (chunk_render->update_region, &rect);
else
chunk_render->update_region = cairo_region_create_rectangle (&rect);
}
rect.x = chunk_render->x;
rect.y = chunk_render->work_y + work_h;
rect.width = chunk_render->width;
rect.height = chunk_render->y + chunk_render->height - rect.y;
if (chunk_render->update_region)
cairo_region_union_rectangle (chunk_render->update_region, &rect);
else
chunk_render->update_region = cairo_region_create_rectangle (&rect);
}
/* Unless specified otherwise, projection re-rendering is organised by
* ChunkRender, which amalgamates areas to be re-rendered and breaks
* them into bite-sized chunks which are chewed on in an idle
* function. This greatly improves responsiveness for many GIMP
* operations. -- Adam
*/
static gboolean
gimp_projection_chunk_render_iteration (GimpProjection *proj,
gboolean chunk)
{
GimpProjectionChunkRender *chunk_render = &proj->priv->chunk_render;
gint work_x = chunk_render->work_x;
gint work_y = chunk_render->work_y;
gint work_w;
gint work_h;
work_w = chunk_render->x + chunk_render->width - work_x;
work_h = chunk_render->y + chunk_render->height - work_y;
if (chunk)
{
if (GIMP_PROJECTION_ADAPTIVE_CHUNK_SIZE)
{
gint chunk_w;
gint chunk_h;
/* try to render in square chunks */
chunk_h = gimp_projection_round_chunk_height (
sqrt (chunk_render->target_n_pixels));
work_h = MIN (work_h, chunk_h);
chunk_w = gimp_projection_round_chunk_width (
chunk_render->target_n_pixels / work_h);
work_w = MIN (work_w, chunk_w);
}
else
{
work_w = MIN (work_w, GIMP_PROJECTION_CHUNK_WIDTH);
work_h = MIN (work_h, GIMP_PROJECTION_CHUNK_HEIGHT);
}
}
else
{
if (work_x != chunk_render->x)
work_h = MIN (work_h, chunk_render->work_height);
}
if (work_h != chunk_render->work_height)
{
/* if the chunk height changed in the middle of a row, merge the
* remaining area back into the update region, and reset the current area
* to the remainder of the row, using the new chunk height
*/
if (work_x != chunk_render->x)
{
gimp_projection_chunk_render_merge (proj);
gimp_projection_chunk_render_set_area (
proj,
work_x,
work_y,
chunk_render->x + chunk_render->width - work_x,
work_h);
}
chunk_render->work_height = work_h;
}
gimp_projection_paint_area (proj, TRUE,
work_x, work_y, work_w, work_h);
chunk_render->n_pixels += work_w * work_h;
chunk_render->work_x += work_w;
if (chunk_render->work_x >= chunk_render->x + chunk_render->width)
{
chunk_render->work_x = chunk_render->x;
chunk_render->work_y += work_h;
if (chunk_render->work_y >= chunk_render->y + chunk_render->height)
{
if (! gimp_projection_chunk_render_next_area (proj))
{
if (proj->priv->invalidate_preview)
{
/* invalidate the preview here since it is constructed from
* the projection
*/
proj->priv->invalidate_preview = FALSE;
gimp_projectable_invalidate_preview (proj->priv->projectable);
}
/* FINISHED */
return FALSE;
}
}
}
/* Still work to do. */
return TRUE;
}
static gboolean
gimp_projection_chunk_render_next_area (GimpProjection *proj)
{
GimpProjectionChunkRender *chunk_render = &proj->priv->chunk_render;
cairo_region_t *next_region;
cairo_rectangle_int_t rect;
if (! chunk_render->update_region)
return FALSE;
if (cairo_region_is_empty (chunk_render->update_region))
{
g_clear_pointer (&chunk_render->update_region, cairo_region_destroy);
return FALSE;
}
next_region = cairo_region_copy (chunk_render->update_region);
cairo_region_intersect_rectangle (next_region, &proj->priv->priority_rect);
if (cairo_region_is_empty (next_region))
cairo_region_get_rectangle (chunk_render->update_region, 0, &rect);
else
cairo_region_get_rectangle (next_region, 0, &rect);
cairo_region_destroy (next_region);
gimp_projection_chunk_render_set_area (proj,
rect.x, rect.y,
rect.width, rect.height);
return TRUE;
}
static void
gimp_projection_chunk_render_set_area (GimpProjection *proj,
gint x,
gint y,
gint w,
gint h)
{
GimpProjectionChunkRender *chunk_render = &proj->priv->chunk_render;
cairo_rectangle_int_t rect;
rect.x = x;
rect.y = y;
rect.width = w;
rect.height = h;
if (chunk_render->update_region)
{
cairo_region_subtract_rectangle (chunk_render->update_region, &rect);
if (cairo_region_is_empty (chunk_render->update_region))
g_clear_pointer (&chunk_render->update_region, cairo_region_destroy);
}
chunk_render->x = rect.x;
chunk_render->y = rect.y;
chunk_render->width = rect.width;
chunk_render->height = rect.height;
chunk_render->work_x = chunk_render->x;
chunk_render->work_y = chunk_render->y;
}
static void
gimp_projection_paint_area (GimpProjection *proj,
gboolean now,
gint x,
gint y,
gint w,
gint h)
{
gint off_x, off_y;
gint width, height;
gimp_projectable_get_offset (proj->priv->projectable, &off_x, &off_y);
gimp_projectable_get_size (proj->priv->projectable, &width, &height);
if (gimp_rectangle_intersect (x, y, w, h,
0, 0, width, height,
&x, &y, &w, &h))
{
if (now)
{
gimp_tile_handler_validate_validate (
proj->priv->validate_handler,
proj->priv->buffer,
GEGL_RECTANGLE (x, y, w, h),
FALSE);
}
else
{
gimp_tile_handler_validate_invalidate (
proj->priv->validate_handler,
GEGL_RECTANGLE (x, y, w, h));
}
/* add the projectable's offsets because the list of update areas
* is in tile-pyramid coordinates, but our external API is always
* in terms of image coordinates.
*/
g_signal_emit (proj, projection_signals[UPDATE], 0,
now,
x + off_x,
y + off_y,
w,
h);
}
}
/* image callbacks */
static void
gimp_projection_projectable_invalidate (GimpProjectable *projectable,
gint x,
gint y,
gint w,
gint h,
GimpProjection *proj)
{
gint off_x, off_y;
gimp_projectable_get_offset (proj->priv->projectable, &off_x, &off_y);
/* subtract the projectable's offsets because the list of update
* areas is in tile-pyramid coordinates, but our external API is
* always in terms of image coordinates.
*/
x -= off_x;
y -= off_y;
gimp_projection_add_update_area (proj, x, y, w, h);
}
static void
gimp_projection_projectable_flush (GimpProjectable *projectable,
gboolean invalidate_preview,
GimpProjection *proj)
{
if (invalidate_preview)
proj->priv->invalidate_preview = TRUE;
gimp_projection_flush (proj);
}
static void
gimp_projection_projectable_structure_changed (GimpProjectable *projectable,
GimpProjection *proj)
{
gint width, height;
gimp_projection_free_buffer (proj);
gimp_projectable_get_size (projectable, &width, &height);
gimp_projection_add_update_area (proj, 0, 0, width, height);
proj->priv->priority_rect.x = 0;
proj->priv->priority_rect.y = 0;
proj->priv->priority_rect.width = width;
proj->priv->priority_rect.height = height;
}
static void
gimp_projection_projectable_bounds_changed (GimpProjectable *projectable,
gint old_x,
gint old_y,
gint old_w,
gint old_h,
GimpProjection *proj)
{
GeglBuffer *old_buffer = proj->priv->buffer;
GimpTileHandlerValidate *old_validate_handler;
gint x, y, w, h;
gint dx, dy;
if (! old_buffer)
{
gimp_projection_projectable_structure_changed (projectable, proj);
return;
}
gimp_projectable_get_offset (projectable, &x, &y);
gimp_projectable_get_size (projectable, &w, &h);
if (x == old_x && y == old_y && w == old_w && h == old_h)
return;
if (! gimp_rectangle_intersect (x, y, w, h,
old_x, old_y, old_w, old_h,
NULL, NULL, NULL, NULL))
{
gimp_projection_projectable_structure_changed (projectable, proj);
return;
}
dx = old_x - x;
dy = old_y - y;
#if 1
/* FIXME: when there's an offset between the new bounds and the old bounds,
* use gimp_projection_projectable_structure_changed(), instead of copying a
* shifted version of the old buffer, since the synchronous copy can take a
* notable amount of time for big buffers, when the offset is such that tiles
* are not COW-ed. while gimp_projection_projectable_structure_changed()
* causes the projection to be re-rendered, which is overall slower, it's
* done asynchronously.
*
* this needs to be improved.
*/
if (dx || dy)
{
gimp_projection_projectable_structure_changed (projectable, proj);
return;
}
#endif
/* reallocate the buffer, and copy the old buffer to the corresponding
* region of the new buffer. additionally, shift and clip all outstanding
* update regions as necessary.
*/
old_validate_handler = proj->priv->validate_handler;
proj->priv->buffer = NULL;
proj->priv->validate_handler = NULL;
gimp_projection_allocate_buffer (proj);
gimp_tile_handler_validate_buffer_copy (old_buffer,
GEGL_RECTANGLE (0, 0, old_w, old_h),
proj->priv->buffer,
GEGL_RECTANGLE (dx, dy, old_w, old_h));
if (old_validate_handler)
{
gimp_tile_handler_validate_unassign (old_validate_handler, old_buffer);
g_object_unref (old_validate_handler);
}
g_object_unref (old_buffer);
if (proj->priv->update_region)
{
const cairo_rectangle_int_t bounds = {0, 0, w, h};
cairo_region_translate (proj->priv->update_region, dx, dy);
cairo_region_intersect_rectangle (proj->priv->update_region, &bounds);
}
if (proj->priv->chunk_render.idle_id)
{
const cairo_rectangle_int_t bounds = {0, 0, w, h};
proj->priv->chunk_render.x += dx;
proj->priv->chunk_render.y += dy;
proj->priv->chunk_render.work_x += dx;
proj->priv->chunk_render.work_y += dx;
if (proj->priv->chunk_render.update_region)
{
cairo_region_translate
(proj->priv->chunk_render.update_region, dx, dy);
cairo_region_intersect_rectangle
(proj->priv->chunk_render.update_region, &bounds);
}
if (! gimp_rectangle_intersect (proj->priv->chunk_render.x,
proj->priv->chunk_render.y,
proj->priv->chunk_render.width,
proj->priv->chunk_render.height,
0, 0, w, h,
&proj->priv->chunk_render.x,
&proj->priv->chunk_render.y,
&proj->priv->chunk_render.width,
&proj->priv->chunk_render.height))
{
if (! gimp_projection_chunk_render_next_area (proj))
gimp_projection_chunk_render_stop (proj);
}
}
if (proj->priv->priority_rect.width > 0 &&
proj->priv->priority_rect.height > 0)
{
proj->priv->priority_rect.x += dx;
proj->priv->priority_rect.y += dy;
gimp_rectangle_intersect (proj->priv->priority_rect.x,
proj->priv->priority_rect.y,
proj->priv->priority_rect.width,
proj->priv->priority_rect.height,
0, 0, w, h,
&proj->priv->priority_rect.x,
&proj->priv->priority_rect.y,
&proj->priv->priority_rect.width,
&proj->priv->priority_rect.height);
}
if (dx > 0)
gimp_projection_add_update_area (proj, 0, 0, dx, h);
if (dy > 0)
gimp_projection_add_update_area (proj, 0, 0, w, dy);
if (dx + old_w < w)
gimp_projection_add_update_area (proj, dx + old_w, 0, w - (dx + old_w), h);
if (dy + old_h < h)
gimp_projection_add_update_area (proj, 0, dy + old_h, w, h - (dy + old_h));
proj->priv->invalidate_preview = TRUE;
}
static gint
gimp_projection_round_chunk_size (gdouble size,
gboolean toward_zero)
{
/* round 'size' (up or down, depending on 'toward_zero') to the closest power
* of 2
*/
if (size < 0.0)
{
return -gimp_projection_round_chunk_size (-size, toward_zero);
}
else if (size == 0.0)
{
return 0;
}
else if (size < 1.0)
{
return toward_zero ? 0 : 1;
}
else
{
gdouble log2_size = log (size) / G_LN2;
if (toward_zero)
log2_size = floor (log2_size);
else
log2_size = ceil (log2_size);
return 1 << (gint) log2_size;
}
}
static gint
gimp_projection_round_chunk_width (gdouble width)
{
gint w = gimp_projection_round_chunk_size (width, FALSE);
return CLAMP (w, GIMP_PROJECTION_CHUNK_MIN_WIDTH,
GIMP_PROJECTION_CHUNK_MAX_WIDTH);
}
static gint
gimp_projection_round_chunk_height (gdouble height)
{
gint h = gimp_projection_round_chunk_size (height, TRUE);
return CLAMP (h, GIMP_PROJECTION_CHUNK_MIN_HEIGHT,
GIMP_PROJECTION_CHUNK_MAX_HEIGHT);
}
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