/* 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 .
*/
#include "config.h"
#include
#include
#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 "core/gimpprojection.h"
#include "gimpdisplay.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-transform.h"
#include "gimpdisplayshell-filter.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)
{
GimpImage *image;
GimpProjection *projection;
GeglBuffer *buffer;
gdouble window_scale = 1.0;
gint viewport_offset_x;
gint viewport_offset_y;
gint viewport_width;
gint viewport_height;
cairo_surface_t *xfer;
gint src_x;
gint src_y;
gint mask_src_x = 0;
gint mask_src_y = 0;
gint stride;
guchar *data;
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (cr != NULL);
g_return_if_fail (w > 0 && h > 0);
image = gimp_display_get_image (shell->display);
projection = gimp_image_get_projection (image);
buffer = gimp_pickable_get_buffer (GIMP_PICKABLE (projection));
#ifdef GIMP_DISPLAY_RENDER_ENABLE_SCALING
/* if we had this future API, things would look pretty on hires (retina) */
window_scale = gdk_window_get_scale_factor (gtk_widget_get_window (gtk_widget_get_toplevel (GTK_WIDGET (shell))));
#endif
window_scale = MIN (window_scale, GIMP_DISPLAY_RENDER_MAX_SCALE);
gimp_display_shell_scroll_get_scaled_viewport (shell,
&viewport_offset_x,
&viewport_offset_y,
&viewport_width,
&viewport_height);
if (shell->rotate_transform)
{
xfer = cairo_surface_create_similar_image (cairo_get_target (cr),
CAIRO_FORMAT_ARGB32,
w * window_scale,
h * window_scale);
cairo_surface_mark_dirty (xfer);
src_x = 0;
src_y = 0;
}
else
{
xfer = gimp_display_xfer_get_surface (shell->xfer,
w * window_scale,
h * window_scale,
&src_x, &src_y);
}
stride = cairo_image_surface_get_stride (xfer);
data = cairo_image_surface_get_data (xfer);
data += src_y * stride + src_x * 4;
/* apply filters to the rendered projection */
if (shell->filter_stack)
{
const Babl *tmp_format = babl_format ("R'G'B'A float");
GeglBuffer *tmp_buffer;
guchar *tmp_data;
tmp_data = gegl_malloc (w * window_scale *
h * window_scale *
babl_format_get_bytes_per_pixel (tmp_format));
gegl_buffer_get (buffer,
GEGL_RECTANGLE ((x + viewport_offset_x) * window_scale,
(y + viewport_offset_y) * window_scale,
w * window_scale,
h * window_scale),
shell->scale_x * window_scale,
tmp_format, tmp_data,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
tmp_buffer =
gegl_buffer_linear_new_from_data (tmp_data, tmp_format,
GEGL_RECTANGLE (0, 0,
w * window_scale,
h * window_scale),
GEGL_AUTO_ROWSTRIDE,
(GDestroyNotify) gegl_free, tmp_data);
gimp_color_display_stack_convert_buffer (shell->filter_stack,
tmp_buffer,
GEGL_RECTANGLE (0, 0,
w * window_scale,
h * window_scale));
gegl_buffer_get (tmp_buffer,
GEGL_RECTANGLE (0, 0,
w * window_scale,
h * window_scale),
1.0,
babl_format ("cairo-ARGB32"),
data, stride,
GEGL_ABYSS_NONE);
g_object_unref (tmp_buffer);
}
else
{
gegl_buffer_get (buffer,
GEGL_RECTANGLE ((x + viewport_offset_x) * window_scale,
(y + viewport_offset_y) * window_scale,
w * window_scale,
h * window_scale),
shell->scale_x * window_scale,
babl_format ("cairo-ARGB32"),
data, stride,
GEGL_ABYSS_NONE);
}
if (shell->mask)
{
gint mask_height;
if (! shell->mask_surface)
{
shell->mask_surface =
cairo_image_surface_create (CAIRO_FORMAT_A8,
GIMP_DISPLAY_RENDER_BUF_WIDTH *
GIMP_DISPLAY_RENDER_MAX_SCALE,
GIMP_DISPLAY_RENDER_BUF_HEIGHT *
GIMP_DISPLAY_RENDER_MAX_SCALE);
}
cairo_surface_mark_dirty (shell->mask_surface);
stride = cairo_image_surface_get_stride (shell->mask_surface);
data = cairo_image_surface_get_data (shell->mask_surface);
data += mask_src_y * stride + mask_src_x * 4;
gegl_buffer_get (shell->mask,
GEGL_RECTANGLE ((x + viewport_offset_x) * window_scale,
(y + viewport_offset_y) * window_scale,
w * window_scale,
h * window_scale),
shell->scale_x * window_scale,
babl_format ("Y u8"),
data, stride,
GEGL_ABYSS_NONE);
/* invert the mask so what is *not* the foreground object is masked */
mask_height = h * window_scale;
while (mask_height--)
{
gint mask_width = w * window_scale;
guchar *d = data;
while (mask_width--)
{
guchar inv = 255 - *d;
*d++ = inv;
}
data += stride;
}
}
/* put it to the screen */
cairo_save (cr);
cairo_rectangle (cr, x, y, w, h);
cairo_scale (cr, 1.0 / window_scale, 1.0 / window_scale);
cairo_set_source_surface (cr, xfer,
(x - src_x) * window_scale,
(y - src_y) * window_scale);
if (shell->rotate_transform)
{
cairo_pattern_t *pattern;
pattern = cairo_get_source (cr);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_PAD);
cairo_set_line_width (cr, 1.0);
cairo_stroke_preserve (cr);
cairo_surface_destroy (xfer);
}
cairo_clip (cr);
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) * window_scale,
(y - mask_src_y) * window_scale);
}
cairo_restore (cr);
}