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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 "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "display-types.h"
#include "core/gimp-cairo.h"
#include "core/gimp-utils.h"
#include "core/gimpimage.h"
#include "gimpcanvas.h"
#include "gimpcanvas-style.h"
#include "gimpcanvaspath.h"
#include "gimpdisplay.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-draw.h"
#include "gimpdisplayshell-render.h"
#include "gimpdisplayshell-scale.h"
#include "gimpdisplayshell-transform.h"
#include "gimpdisplayxfer.h"
#ifdef GDK_WINDOWING_QUARTZ
#import <AppKit/AppKit.h>
#endif
/* #define GIMP_DISPLAY_RENDER_ENABLE_SCALING 1 */
/* public functions */
void
gimp_display_shell_draw_selection_out (GimpDisplayShell *shell,
cairo_t *cr,
GimpSegment *segs,
gint n_segs)
{
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (cr != NULL);
g_return_if_fail (segs != NULL && n_segs > 0);
gimp_canvas_set_selection_out_style (shell->canvas, cr,
shell->offset_x, shell->offset_y);
gimp_cairo_segments (cr, segs, n_segs);
cairo_stroke (cr);
}
void
gimp_display_shell_draw_selection_in (GimpDisplayShell *shell,
cairo_t *cr,
cairo_pattern_t *mask,
gint index)
{
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (cr != NULL);
g_return_if_fail (mask != NULL);
gimp_canvas_set_selection_in_style (shell->canvas, cr, index,
shell->offset_x, shell->offset_y);
cairo_mask (cr, mask);
}
void
gimp_display_shell_draw_checkerboard (GimpDisplayShell *shell,
cairo_t *cr)
{
GimpImage *image;
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (cr != NULL);
image = gimp_display_get_image (shell->display);
if (G_UNLIKELY (! shell->checkerboard))
{
GimpCheckSize check_size;
GimpCheckType check_type;
guchar check_light;
guchar check_dark;
GimpRGB light;
GimpRGB dark;
g_object_get (shell->display->config,
"transparency-size", &check_size,
"transparency-type", &check_type,
NULL);
gimp_checks_get_shades (check_type, &check_light, &check_dark);
gimp_rgb_set_uchar (&light, check_light, check_light, check_light);
gimp_rgb_set_uchar (&dark, check_dark, check_dark, check_dark);
shell->checkerboard =
gimp_cairo_checkerboard_create (cr,
1 << (check_size + 2), &light, &dark);
}
cairo_translate (cr, - shell->offset_x, - shell->offset_y);
if (gimp_image_get_component_visible (image, GIMP_CHANNEL_ALPHA))
cairo_set_source (cr, shell->checkerboard);
else
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
cairo_paint (cr);
}
void
gimp_display_shell_draw_image (GimpDisplayShell *shell,
cairo_t *cr,
gint x,
gint y,
gint w,
gint h)
{
gdouble chunk_width;
gdouble chunk_height;
gdouble scale = 1.0;
gint n_rows;
gint n_cols;
gint r, c;
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (gimp_display_get_image (shell->display));
g_return_if_fail (cr != NULL);
/* display the image in RENDER_BUF_WIDTH x RENDER_BUF_HEIGHT
* maximally-sized image-space chunks. adjust the screen-space
* chunk size as necessary, to accommodate for the display
* transform and window scale factor.
*/
chunk_width = GIMP_DISPLAY_RENDER_BUF_WIDTH;
chunk_height = GIMP_DISPLAY_RENDER_BUF_HEIGHT;
#ifdef GIMP_DISPLAY_RENDER_ENABLE_SCALING
/* if we had this future API, things would look pretty on hires (retina) */
scale *=
gdk_window_get_scale_factor (
gtk_widget_get_window (gtk_widget_get_toplevel (GTK_WIDGET (shell))));
#elif defined(GDK_WINDOWING_QUARTZ)
/* gtk2/osx retina support */
if ([
[NSScreen mainScreen]
respondsToSelector: @selector(backingScaleFactor)
]) {
for (NSScreen * screen in [NSScreen screens]) {
float s = [screen backingScaleFactor];
if (s > scale) scale = s;
}
}
#endif
scale = MIN (scale, GIMP_DISPLAY_RENDER_MAX_SCALE);
scale *= MAX (shell->scale_x, shell->scale_y);
if (scale != shell->scale_x)
chunk_width = (chunk_width - 1.0) * (shell->scale_x / scale);
if (scale != shell->scale_y)
chunk_height = (chunk_height - 1.0) * (shell->scale_y / scale);
if (shell->rotate_untransform)
{
gdouble a = shell->rotate_angle * G_PI / 180.0;
chunk_width = chunk_height = (MIN (chunk_width, chunk_height) - 1.0) /
(fabs (sin (a)) + fabs (cos (a)));
}
/* divide the painted area to evenly-sized chunks */
n_rows = ceil (h / floor (chunk_height));
n_cols = ceil (w / floor (chunk_width));
for (r = 0; r < n_rows; r++)
{
gint y1 = y + (2 * r * h + n_rows) / (2 * n_rows);
gint y2 = y + (2 * (r + 1) * h + n_rows) / (2 * n_rows);
for (c = 0; c < n_cols; c++)
{
gint x1 = x + (2 * c * w + n_cols) / (2 * n_cols);
gint x2 = x + (2 * (c + 1) * w + n_cols) / (2 * n_cols);
gdouble ix1, iy1;
gdouble ix2, iy2;
gint ix, iy;
gint iw, ih;
/* map chunk from screen space to scaled image space */
gimp_display_shell_untransform_bounds_with_scale (
shell, scale,
x1, y1, x2, y2,
&ix1, &iy1, &ix2, &iy2);
ix = floor (ix1);
iy = floor (iy1);
iw = ceil (ix2) - ix;
ih = ceil (iy2) - iy;
cairo_save (cr);
/* clip to chunk bounds, in screen space */
cairo_rectangle (cr, x1, y1, x2 - x1, y2 - y1);
cairo_clip (cr);
/* transform to scaled image space, and apply uneven scaling */
if (shell->rotate_transform)
cairo_transform (cr, shell->rotate_transform);
cairo_translate (cr, -shell->offset_x, -shell->offset_y);
cairo_scale (cr, shell->scale_x / scale, shell->scale_y / scale);
/* render image */
gimp_display_shell_render (shell, cr, ix, iy, iw, ih, scale);
cairo_restore (cr);
/* if the GIMP_BRICK_WALL environment variable is defined,
* show chunk bounds
*/
{
static gint brick_wall = -1;
if (brick_wall < 0)
brick_wall = (g_getenv ("GIMP_BRICK_WALL") != NULL);
if (brick_wall)
{
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
cairo_rectangle (cr, x1, y1, x2 - x1, y2 - y1);
cairo_stroke (cr);
}
}
}
}
}
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