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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 <gegl.h>
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "display-types.h"
#include "config/gimpdisplayconfig.h"
#include "gegl/gimp-gegl-utils.h"
#include "core/gimpdrawable.h"
#include "core/gimpimage.h"
#include "core/gimppickable.h"
#include "core/gimpprojectable.h"
#include "gimpdisplay.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-transform.h"
#include "gimpdisplayshell-filter.h"
#include "gimpdisplayshell-profile.h"
#include "gimpdisplayshell-render.h"
#include "gimpdisplayshell-scroll.h"
#include "gimpdisplayxfer.h"
void
gimp_display_shell_render (GimpDisplayShell *shell,
cairo_t *cr,
gint x,
gint y,
gint w,
gint h,
gdouble scale)
{
GimpImage *image;
GeglBuffer *buffer;
#ifdef USE_NODE_BLIT
GeglNode *node;
#endif
GeglAbyssPolicy abyss_policy;
cairo_surface_t *xfer;
gint xfer_src_x;
gint xfer_src_y;
gint mask_src_x = 0;
gint mask_src_y = 0;
gint cairo_stride;
guchar *cairo_data;
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (cr != NULL);
g_return_if_fail (w > 0 && w <= GIMP_DISPLAY_RENDER_BUF_WIDTH);
g_return_if_fail (h > 0 && h <= GIMP_DISPLAY_RENDER_BUF_HEIGHT);
g_return_if_fail (scale > 0.0);
image = gimp_display_get_image (shell->display);
buffer = gimp_pickable_get_buffer (
gimp_display_shell_get_pickable (shell));
#ifdef USE_NODE_BLIT
node = gimp_projectable_get_graph (GIMP_PROJECTABLE (image));
gimp_projectable_begin_render (GIMP_PROJECTABLE (image));
#endif
if (shell->show_all)
abyss_policy = GEGL_ABYSS_NONE;
else
abyss_policy = GEGL_ABYSS_CLAMP;
xfer = gimp_display_xfer_get_surface (shell->xfer, w, h,
&xfer_src_x, &xfer_src_y);
cairo_stride = cairo_image_surface_get_stride (xfer);
cairo_data = cairo_image_surface_get_data (xfer) +
xfer_src_y * cairo_stride + xfer_src_x * 4;
if (shell->profile_transform ||
gimp_display_shell_has_filter (shell))
{
gboolean can_convert_to_u8;
/* if there is a profile transform or a display filter, we need
* to use temp buffers
*/
can_convert_to_u8 = gimp_display_shell_profile_can_convert_to_u8 (shell);
/* create the filter buffer if we have filters, or can't convert
* to u8 directly
*/
if ((gimp_display_shell_has_filter (shell) || ! can_convert_to_u8) &&
! shell->filter_buffer)
{
gint fw = GIMP_DISPLAY_RENDER_BUF_WIDTH;
gint fh = GIMP_DISPLAY_RENDER_BUF_HEIGHT;
shell->filter_data =
gegl_malloc (fw * fh *
babl_format_get_bytes_per_pixel (shell->filter_format));
shell->filter_stride =
fw * babl_format_get_bytes_per_pixel (shell->filter_format);
shell->filter_buffer =
gegl_buffer_linear_new_from_data (shell->filter_data,
shell->filter_format,
GEGL_RECTANGLE (0, 0, fw, fh),
GEGL_AUTO_ROWSTRIDE,
(GDestroyNotify) gegl_free,
shell->filter_data);
}
if (! gimp_display_shell_has_filter (shell) || shell->filter_transform)
{
/* if there are no filters, or there is a filter transform,
* load the projection pixels into the profile_buffer
*/
#ifndef USE_NODE_BLIT
gegl_buffer_get (buffer,
GEGL_RECTANGLE (x, y, w, h), scale,
gimp_projectable_get_format (GIMP_PROJECTABLE (image)),
shell->profile_data, shell->profile_stride,
abyss_policy);
#else
gegl_node_blit (node,
scale, GEGL_RECTANGLE (x, y, w, h),
gimp_projectable_get_format (GIMP_PROJECTABLE (image)),
shell->profile_data, shell->profile_stride,
GEGL_BLIT_CACHE);
#endif
}
else
{
/* otherwise, load the pixels directly into the filter_buffer
*/
#ifndef USE_NODE_BLIT
gegl_buffer_get (buffer,
GEGL_RECTANGLE (x, y, w, h), scale,
shell->filter_format,
shell->filter_data, shell->filter_stride,
abyss_policy);
#else
gegl_node_blit (node,
scale, GEGL_RECTANGLE (x, y, w, h),
shell->filter_format,
shell->filter_data, shell->filter_stride,
GEGL_BLIT_CACHE);
#endif
}
/* if there is a filter transform, convert the pixels from
* the profile_buffer to the filter_buffer
*/
if (shell->filter_transform)
{
gimp_color_transform_process_buffer (shell->filter_transform,
shell->profile_buffer,
GEGL_RECTANGLE (0, 0, w, h),
shell->filter_buffer,
GEGL_RECTANGLE (0, 0, w, h));
}
/* if there are filters, apply them
*/
if (gimp_display_shell_has_filter (shell))
{
GeglBuffer *filter_buffer;
/* shift the filter_buffer so that the area passed to
* the filters is the real render area, allowing for
* position-dependent filters
*/
filter_buffer = g_object_new (GEGL_TYPE_BUFFER,
"source", shell->filter_buffer,
"shift-x", -x,
"shift-y", -y,
NULL);
/* convert the filter_buffer in place
*/
gimp_color_display_stack_convert_buffer (shell->filter_stack,
filter_buffer,
GEGL_RECTANGLE (x, y, w, h));
g_object_unref (filter_buffer);
}
/* if there is a profile transform...
*/
if (shell->profile_transform)
{
if (gimp_display_shell_has_filter (shell))
{
/* if we have filters, convert the pixels in the filter_buffer
* in-place
*/
gimp_color_transform_process_buffer (shell->profile_transform,
shell->filter_buffer,
GEGL_RECTANGLE (0, 0, w, h),
shell->filter_buffer,
GEGL_RECTANGLE (0, 0, w, h));
}
else if (! can_convert_to_u8)
{
/* otherwise, if we can't convert to u8 directly, convert
* the pixels from the profile_buffer to the filter_buffer
*/
gimp_color_transform_process_buffer (shell->profile_transform,
shell->profile_buffer,
GEGL_RECTANGLE (0, 0, w, h),
shell->filter_buffer,
GEGL_RECTANGLE (0, 0, w, h));
}
else
{
GeglBuffer *buffer =
gegl_buffer_linear_new_from_data (cairo_data,
babl_format ("cairo-ARGB32"),
GEGL_RECTANGLE (0, 0, w, h),
cairo_stride,
NULL, NULL);
/* otherwise, convert the profile_buffer directly into
* the cairo_buffer
*/
gimp_color_transform_process_buffer (shell->profile_transform,
shell->profile_buffer,
GEGL_RECTANGLE (0, 0, w, h),
buffer,
GEGL_RECTANGLE (0, 0, w, h));
g_object_unref (buffer);
}
}
/* finally, copy the filter buffer to the cairo-ARGB32 buffer,
* if necessary
*/
if (gimp_display_shell_has_filter (shell) || ! can_convert_to_u8)
{
gegl_buffer_get (shell->filter_buffer,
GEGL_RECTANGLE (0, 0, w, h), 1.0,
babl_format ("cairo-ARGB32"),
cairo_data, cairo_stride,
GEGL_ABYSS_NONE);
}
}
else
{
/* otherwise we can copy the projection pixels straight to the
* cairo-ARGB32 buffer
*/
#ifndef USE_NODE_BLIT
gegl_buffer_get (buffer,
GEGL_RECTANGLE (x, y, w, h), scale,
babl_format ("cairo-ARGB32"),
cairo_data, cairo_stride,
abyss_policy);
#else
gegl_node_blit (node,
scale, GEGL_RECTANGLE (x, y, w, h),
babl_format ("cairo-ARGB32"),
cairo_data, cairo_stride,
GEGL_BLIT_CACHE);
#endif
}
#ifdef USE_NODE_BLIT
gimp_projectable_end_render (GIMP_PROJECTABLE (image));
#endif
if (shell->mask)
{
if (! shell->mask_surface)
{
shell->mask_surface =
cairo_image_surface_create (CAIRO_FORMAT_A8,
GIMP_DISPLAY_RENDER_BUF_WIDTH,
GIMP_DISPLAY_RENDER_BUF_HEIGHT);
}
cairo_surface_mark_dirty (shell->mask_surface);
cairo_stride = cairo_image_surface_get_stride (shell->mask_surface);
cairo_data = cairo_image_surface_get_data (shell->mask_surface) +
mask_src_y * cairo_stride + mask_src_x;
gegl_buffer_get (shell->mask,
GEGL_RECTANGLE (x - floor (shell->mask_offset_x * scale),
y - floor (shell->mask_offset_y * scale),
w, h),
scale,
babl_format ("Y u8"),
cairo_data, cairo_stride,
GEGL_ABYSS_NONE);
if (shell->mask_inverted)
{
gint mask_height = h;
while (mask_height--)
{
gint mask_width = w;
guchar *d = cairo_data;
while (mask_width--)
{
guchar inv = 255 - *d;
*d++ = inv;
}
cairo_data += cairo_stride;
}
}
}
/* put it to the screen */
cairo_set_source_surface (cr, xfer,
x - xfer_src_x,
y - xfer_src_y);
cairo_paint (cr);
if (shell->mask)
{
gimp_cairo_set_source_rgba (cr, &shell->mask_color);
cairo_mask_surface (cr, shell->mask_surface,
x - mask_src_x,
y - mask_src_y);
}
}
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