28e1a379e6
They are unreliable because every type checking cast discards them, they are useless anyway, visual clutter, added inconsistently, and generally suck. Wanted to do this a long time ago, it was a bad idea in the first place.
904 lines
28 KiB
C
904 lines
28 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libgimpmath/gimpmath.h"
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#include "display-types.h"
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#include "core/gimpboundary.h"
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#include "core/gimpdrawable.h"
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#include "core/gimpimage.h"
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#include "core/gimp-utils.h"
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#include "gimpdisplay.h"
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#include "gimpdisplayshell.h"
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#include "gimpdisplayshell-scroll.h"
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#include "gimpdisplayshell-transform.h"
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/**
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* gimp_display_shell_zoom_coords:
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* @shell: a #GimpDisplayShell
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* @image_coords: image coordinates
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* @display_coords: returns the corresponding display coordinates
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*
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* Zooms from image coordinates to display coordinates, so that
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* objects can be rendered at the correct points on the display.
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**/
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void
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gimp_display_shell_zoom_coords (GimpDisplayShell *shell,
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const GimpCoords *image_coords,
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GimpCoords *display_coords)
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{
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g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (image_coords != NULL);
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g_return_if_fail (display_coords != NULL);
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*display_coords = *image_coords;
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display_coords->x = SCALEX (shell, image_coords->x);
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display_coords->y = SCALEY (shell, image_coords->y);
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display_coords->x -= shell->offset_x;
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display_coords->y -= shell->offset_y;
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}
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/**
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* gimp_display_shell_unzoom_coords:
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* @shell: a #GimpDisplayShell
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* @display_coords: display coordinates
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* @image_coords: returns the corresponding image coordinates
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*
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* Zooms from display coordinates to image coordinates, so that
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* points on the display can be mapped to points in the image.
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**/
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void
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gimp_display_shell_unzoom_coords (GimpDisplayShell *shell,
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const GimpCoords *display_coords,
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GimpCoords *image_coords)
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{
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g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (display_coords != NULL);
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g_return_if_fail (image_coords != NULL);
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*image_coords = *display_coords;
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image_coords->x += shell->offset_x;
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image_coords->y += shell->offset_y;
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image_coords->x /= shell->scale_x;
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image_coords->y /= shell->scale_y;
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}
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/**
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* gimp_display_shell_zoom_xy:
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* @shell:
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* @x:
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* @y:
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* @nx:
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* @ny:
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*
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* Zooms an image coordinate to a shell coordinate.
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**/
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void
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gimp_display_shell_zoom_xy (GimpDisplayShell *shell,
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gdouble x,
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gdouble y,
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gint *nx,
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gint *ny)
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{
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gint64 tx;
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gint64 ty;
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g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (nx != NULL);
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g_return_if_fail (ny != NULL);
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tx = x * shell->scale_x;
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ty = y * shell->scale_y;
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tx -= shell->offset_x;
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ty -= shell->offset_y;
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/* The projected coordinates might overflow a gint in the case of
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* big images at high zoom levels, so we clamp them here to avoid
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* problems.
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*/
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*nx = CLAMP (tx, G_MININT, G_MAXINT);
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*ny = CLAMP (ty, G_MININT, G_MAXINT);
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}
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/**
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* gimp_display_shell_unzoom_xy:
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* @shell: a #GimpDisplayShell
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* @x: x coordinate in display coordinates
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* @y: y coordinate in display coordinates
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* @nx: returns x oordinate in image coordinates
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* @ny: returns y coordinate in image coordinates
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* @round: if %TRUE, round the results to the nearest integer;
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* if %FALSE, simply cast them to @gint.
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*
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* Zoom from display coordinates to image coordinates, so that
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* points on the display can be mapped to the corresponding points
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* in the image.
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**/
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void
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gimp_display_shell_unzoom_xy (GimpDisplayShell *shell,
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gint x,
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gint y,
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gint *nx,
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gint *ny,
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gboolean round)
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{
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gint64 tx;
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gint64 ty;
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g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (nx != NULL);
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g_return_if_fail (ny != NULL);
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if (round)
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{
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tx = SIGNED_ROUND (((gdouble) x + shell->offset_x) / shell->scale_x);
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ty = SIGNED_ROUND (((gdouble) y + shell->offset_y) / shell->scale_y);
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}
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else
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{
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tx = ((gint64) x + shell->offset_x) / shell->scale_x;
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ty = ((gint64) y + shell->offset_y) / shell->scale_y;
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}
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*nx = CLAMP (tx, G_MININT, G_MAXINT);
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*ny = CLAMP (ty, G_MININT, G_MAXINT);
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}
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/**
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* gimp_display_shell_zoom_xy_f:
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* @shell: a #GimpDisplayShell
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* @x: image x coordinate of point
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* @y: image y coordinate of point
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* @nx: returned shell canvas x coordinate
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* @ny: returned shell canvas y coordinate
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*
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* Zooms from image coordinates to display shell canvas
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* coordinates.
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**/
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void
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gimp_display_shell_zoom_xy_f (GimpDisplayShell *shell,
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gdouble x,
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gdouble y,
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gdouble *nx,
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gdouble *ny)
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{
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g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (nx != NULL);
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g_return_if_fail (ny != NULL);
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*nx = SCALEX (shell, x) - shell->offset_x;
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*ny = SCALEY (shell, y) - shell->offset_y;
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}
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/**
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* gimp_display_shell_unzoom_xy_f:
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* @shell: a #GimpDisplayShell
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* @x: x coordinate in display coordinates
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* @y: y coordinate in display coordinates
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* @nx: place to return x coordinate in image coordinates
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* @ny: place to return y coordinate in image coordinates
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*
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* This function is identical to gimp_display_shell_unzoom_xy(),
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* except that the input and output coordinates are doubles rather than
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* ints, and consequently there is no option related to rounding.
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**/
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void
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gimp_display_shell_unzoom_xy_f (GimpDisplayShell *shell,
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gdouble x,
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gdouble y,
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gdouble *nx,
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gdouble *ny)
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{
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g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (nx != NULL);
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g_return_if_fail (ny != NULL);
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*nx = (x + shell->offset_x) / shell->scale_x;
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*ny = (y + shell->offset_y) / shell->scale_y;
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}
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/**
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* gimp_display_shell_zoom_segments:
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* @shell: a #GimpDisplayShell
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* @src_segs: array of segments in image coordinates
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* @dest_segs: returns the corresponding segments in display coordinates
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* @n_segs: number of segments
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*
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* Zooms from image coordinates to display coordinates, so that
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* objects can be rendered at the correct points on the display.
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**/
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void
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gimp_display_shell_zoom_segments (GimpDisplayShell *shell,
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const GimpBoundSeg *src_segs,
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GimpSegment *dest_segs,
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gint n_segs,
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gdouble offset_x,
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gdouble offset_y)
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{
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gint i;
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g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
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for (i = 0; i < n_segs ; i++)
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{
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gdouble x1, x2;
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gdouble y1, y2;
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x1 = src_segs[i].x1 + offset_x;
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x2 = src_segs[i].x2 + offset_x;
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y1 = src_segs[i].y1 + offset_y;
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y2 = src_segs[i].y2 + offset_y;
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dest_segs[i].x1 = SCALEX (shell, x1) - shell->offset_x;
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dest_segs[i].x2 = SCALEX (shell, x2) - shell->offset_x;
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dest_segs[i].y1 = SCALEY (shell, y1) - shell->offset_y;
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dest_segs[i].y2 = SCALEY (shell, y2) - shell->offset_y;
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}
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}
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/**
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* gimp_display_shell_rotate_coords:
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* @shell: a #GimpDisplayShell
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* @image_coords: unrotated display coordinates
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* @display_coords: returns the corresponding rotated display coordinates
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*
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* Rotates from unrotated display coordinates to rotated display
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* coordinates, so that objects can be rendered at the correct points
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* on the display.
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**/
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void
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gimp_display_shell_rotate_coords (GimpDisplayShell *shell,
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const GimpCoords *unrotated_coords,
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GimpCoords *rotated_coords)
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{
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g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (unrotated_coords != NULL);
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g_return_if_fail (rotated_coords != NULL);
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*rotated_coords = *unrotated_coords;
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if (shell->rotate_transform)
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cairo_matrix_transform_point (shell->rotate_transform,
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&rotated_coords->x,
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&rotated_coords->y);
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}
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/**
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* gimp_display_shell_unrotate_coords:
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* @shell: a #GimpDisplayShell
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* @display_coords: rotated display coordinates
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* @image_coords: returns the corresponding unrotated display coordinates
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*
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* Rotates from rotated display coordinates to unrotated display coordinates.
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**/
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void
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gimp_display_shell_unrotate_coords (GimpDisplayShell *shell,
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const GimpCoords *rotated_coords,
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GimpCoords *unrotated_coords)
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{
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g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (rotated_coords != NULL);
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g_return_if_fail (unrotated_coords != NULL);
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*unrotated_coords = *rotated_coords;
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if (shell->rotate_untransform)
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cairo_matrix_transform_point (shell->rotate_untransform,
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&unrotated_coords->x,
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&unrotated_coords->y);
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}
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/**
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* gimp_display_shell_rotate_xy:
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* @shell:
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* @x:
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* @y:
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* @nx:
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* @ny:
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*
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* Rotates an unrotated display coordinate to a rotated shell coordinate.
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**/
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void
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gimp_display_shell_rotate_xy (GimpDisplayShell *shell,
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gdouble x,
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gdouble y,
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gint *nx,
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gint *ny)
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{
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gint64 tx;
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gint64 ty;
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g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (nx != NULL);
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g_return_if_fail (ny != NULL);
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if (shell->rotate_transform)
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cairo_matrix_transform_point (shell->rotate_transform, &x, &y);
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tx = x;
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ty = y;
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/* The projected coordinates might overflow a gint in the case of
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* big images at high zoom levels, so we clamp them here to avoid
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* problems.
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*/
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*nx = CLAMP (tx, G_MININT, G_MAXINT);
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*ny = CLAMP (ty, G_MININT, G_MAXINT);
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}
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/**
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* gimp_display_shell_unrotate_xy:
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* @shell: a #GimpDisplayShell
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* @x: x coordinate in rotated display coordinates
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* @y: y coordinate in rotated display coordinates
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* @nx: returns x oordinate in unrotated display coordinates
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* @ny: returns y coordinate in unrotated display coordinates
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*
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* Rotate from rotated display coordinates to unrotated display
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* coordinates.
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**/
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void
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gimp_display_shell_unrotate_xy (GimpDisplayShell *shell,
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gint x,
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gint y,
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gint *nx,
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gint *ny)
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{
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g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (nx != NULL);
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g_return_if_fail (ny != NULL);
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if (shell->rotate_untransform)
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{
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gdouble fx = x;
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gdouble fy = y;
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cairo_matrix_transform_point (shell->rotate_untransform, &fy, &fy);
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*nx = CLAMP (fx, G_MININT, G_MAXINT);
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*ny = CLAMP (fy, G_MININT, G_MAXINT);
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}
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else
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{
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*nx = x;
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*ny = y;
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}
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}
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/**
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* gimp_display_shell_rotate_xy_f:
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* @shell: a #GimpDisplayShell
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* @x: image x coordinate of point
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* @y: image y coordinate of point
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* @nx: returned shell canvas x coordinate
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* @ny: returned shell canvas y coordinate
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*
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* Rotates from untransformed display coordinates to rotated display
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* coordinates.
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**/
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void
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gimp_display_shell_rotate_xy_f (GimpDisplayShell *shell,
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gdouble x,
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gdouble y,
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gdouble *nx,
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gdouble *ny)
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{
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g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (nx != NULL);
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g_return_if_fail (ny != NULL);
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*nx = x;
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*ny = y;
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if (shell->rotate_transform)
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cairo_matrix_transform_point (shell->rotate_transform, nx, ny);
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}
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/**
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* gimp_display_shell_unrotate_xy_f:
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* @shell: a #GimpDisplayShell
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* @x: x coordinate in rotated display coordinates
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* @y: y coordinate in rotated display coordinates
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* @nx: place to return x coordinate in unrotated display coordinates
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* @ny: place to return y coordinate in unrotated display coordinates
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*
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* This function is identical to gimp_display_shell_unrotate_xy(),
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* except that the input and output coordinates are doubles rather
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* than ints.
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**/
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void
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gimp_display_shell_unrotate_xy_f (GimpDisplayShell *shell,
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gdouble x,
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gdouble y,
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gdouble *nx,
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gdouble *ny)
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{
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g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
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g_return_if_fail (nx != NULL);
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g_return_if_fail (ny != NULL);
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*nx = x;
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*ny = y;
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if (shell->rotate_untransform)
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cairo_matrix_transform_point (shell->rotate_untransform, nx, ny);
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}
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void
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gimp_display_shell_rotate_bounds (GimpDisplayShell *shell,
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gdouble x1,
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gdouble y1,
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gdouble x2,
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gdouble y2,
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gdouble *nx1,
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gdouble *ny1,
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gdouble *nx2,
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gdouble *ny2)
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{
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g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
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if (shell->rotate_transform)
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{
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gdouble tx1 = x1;
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gdouble ty1 = y1;
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gdouble tx2 = x1;
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gdouble ty2 = y2;
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gdouble tx3 = x2;
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gdouble ty3 = y1;
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gdouble tx4 = x2;
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gdouble ty4 = y2;
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cairo_matrix_transform_point (shell->rotate_transform, &tx1, &ty1);
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cairo_matrix_transform_point (shell->rotate_transform, &tx2, &ty2);
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cairo_matrix_transform_point (shell->rotate_transform, &tx3, &ty3);
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cairo_matrix_transform_point (shell->rotate_transform, &tx4, &ty4);
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*nx1 = MIN4 (tx1, tx2, tx3, tx4);
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*ny1 = MIN4 (ty1, ty2, ty3, ty4);
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*nx2 = MAX4 (tx1, tx2, tx3, tx4);
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*ny2 = MAX4 (ty1, ty2, ty3, ty4);
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}
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else
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{
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*nx1 = x1;
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*ny1 = y1;
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*nx2 = x2;
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*ny2 = y2;
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}
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}
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|
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void
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gimp_display_shell_unrotate_bounds (GimpDisplayShell *shell,
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gdouble x1,
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gdouble y1,
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gdouble x2,
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gdouble y2,
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gdouble *nx1,
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gdouble *ny1,
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gdouble *nx2,
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gdouble *ny2)
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{
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g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
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if (shell->rotate_untransform)
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{
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gdouble tx1 = x1;
|
|
gdouble ty1 = y1;
|
|
gdouble tx2 = x1;
|
|
gdouble ty2 = y2;
|
|
gdouble tx3 = x2;
|
|
gdouble ty3 = y1;
|
|
gdouble tx4 = x2;
|
|
gdouble ty4 = y2;
|
|
|
|
cairo_matrix_transform_point (shell->rotate_untransform, &tx1, &ty1);
|
|
cairo_matrix_transform_point (shell->rotate_untransform, &tx2, &ty2);
|
|
cairo_matrix_transform_point (shell->rotate_untransform, &tx3, &ty3);
|
|
cairo_matrix_transform_point (shell->rotate_untransform, &tx4, &ty4);
|
|
|
|
*nx1 = MIN4 (tx1, tx2, tx3, tx4);
|
|
*ny1 = MIN4 (ty1, ty2, ty3, ty4);
|
|
*nx2 = MAX4 (tx1, tx2, tx3, tx4);
|
|
*ny2 = MAX4 (ty1, ty2, ty3, ty4);
|
|
}
|
|
else
|
|
{
|
|
*nx1 = x1;
|
|
*ny1 = y1;
|
|
*nx2 = x2;
|
|
*ny2 = y2;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gimp_display_shell_transform_coords:
|
|
* @shell: a #GimpDisplayShell
|
|
* @image_coords: image coordinates
|
|
* @display_coords: returns the corresponding display coordinates
|
|
*
|
|
* Transforms from image coordinates to display coordinates, so that
|
|
* objects can be rendered at the correct points on the display.
|
|
**/
|
|
void
|
|
gimp_display_shell_transform_coords (GimpDisplayShell *shell,
|
|
const GimpCoords *image_coords,
|
|
GimpCoords *display_coords)
|
|
{
|
|
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
|
|
g_return_if_fail (image_coords != NULL);
|
|
g_return_if_fail (display_coords != NULL);
|
|
|
|
*display_coords = *image_coords;
|
|
|
|
display_coords->x = SCALEX (shell, image_coords->x);
|
|
display_coords->y = SCALEY (shell, image_coords->y);
|
|
|
|
display_coords->x -= shell->offset_x;
|
|
display_coords->y -= shell->offset_y;
|
|
|
|
if (shell->rotate_transform)
|
|
cairo_matrix_transform_point (shell->rotate_transform,
|
|
&display_coords->x,
|
|
&display_coords->y);
|
|
}
|
|
|
|
/**
|
|
* gimp_display_shell_untransform_coords:
|
|
* @shell: a #GimpDisplayShell
|
|
* @display_coords: display coordinates
|
|
* @image_coords: returns the corresponding image coordinates
|
|
*
|
|
* Transforms from display coordinates to image coordinates, so that
|
|
* points on the display can be mapped to points in the image.
|
|
**/
|
|
void
|
|
gimp_display_shell_untransform_coords (GimpDisplayShell *shell,
|
|
const GimpCoords *display_coords,
|
|
GimpCoords *image_coords)
|
|
{
|
|
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
|
|
g_return_if_fail (display_coords != NULL);
|
|
g_return_if_fail (image_coords != NULL);
|
|
|
|
*image_coords = *display_coords;
|
|
|
|
if (shell->rotate_untransform)
|
|
cairo_matrix_transform_point (shell->rotate_untransform,
|
|
&image_coords->x,
|
|
&image_coords->y);
|
|
|
|
image_coords->x += shell->offset_x;
|
|
image_coords->y += shell->offset_y;
|
|
|
|
image_coords->x /= shell->scale_x;
|
|
image_coords->y /= shell->scale_y;
|
|
|
|
image_coords->xscale = shell->scale_x;
|
|
image_coords->yscale = shell->scale_y;
|
|
|
|
}
|
|
|
|
/**
|
|
* gimp_display_shell_transform_xy:
|
|
* @shell:
|
|
* @x:
|
|
* @y:
|
|
* @nx:
|
|
* @ny:
|
|
*
|
|
* Transforms an image coordinate to a shell coordinate.
|
|
**/
|
|
void
|
|
gimp_display_shell_transform_xy (GimpDisplayShell *shell,
|
|
gdouble x,
|
|
gdouble y,
|
|
gint *nx,
|
|
gint *ny)
|
|
{
|
|
gint64 tx;
|
|
gint64 ty;
|
|
|
|
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
|
|
g_return_if_fail (nx != NULL);
|
|
g_return_if_fail (ny != NULL);
|
|
|
|
tx = x * shell->scale_x;
|
|
ty = y * shell->scale_y;
|
|
|
|
tx -= shell->offset_x;
|
|
ty -= shell->offset_y;
|
|
|
|
if (shell->rotate_transform)
|
|
{
|
|
gdouble fx = tx;
|
|
gdouble fy = ty;
|
|
|
|
cairo_matrix_transform_point (shell->rotate_transform, &fx, &fy);
|
|
|
|
tx = fx;
|
|
ty = fy;
|
|
}
|
|
|
|
/* The projected coordinates might overflow a gint in the case of
|
|
* big images at high zoom levels, so we clamp them here to avoid
|
|
* problems.
|
|
*/
|
|
*nx = CLAMP (tx, G_MININT, G_MAXINT);
|
|
*ny = CLAMP (ty, G_MININT, G_MAXINT);
|
|
}
|
|
|
|
/**
|
|
* gimp_display_shell_untransform_xy:
|
|
* @shell: a #GimpDisplayShell
|
|
* @x: x coordinate in display coordinates
|
|
* @y: y coordinate in display coordinates
|
|
* @nx: returns x oordinate in image coordinates
|
|
* @ny: returns y coordinate in image coordinates
|
|
* @round: if %TRUE, round the results to the nearest integer;
|
|
* if %FALSE, simply cast them to @gint.
|
|
*
|
|
* Transform from display coordinates to image coordinates, so that
|
|
* points on the display can be mapped to the corresponding points
|
|
* in the image.
|
|
**/
|
|
void
|
|
gimp_display_shell_untransform_xy (GimpDisplayShell *shell,
|
|
gint x,
|
|
gint y,
|
|
gint *nx,
|
|
gint *ny,
|
|
gboolean round)
|
|
{
|
|
gint64 tx;
|
|
gint64 ty;
|
|
|
|
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
|
|
g_return_if_fail (nx != NULL);
|
|
g_return_if_fail (ny != NULL);
|
|
|
|
if (shell->rotate_untransform)
|
|
{
|
|
gdouble fx = x;
|
|
gdouble fy = y;
|
|
|
|
cairo_matrix_transform_point (shell->rotate_untransform, &fy, &fy);
|
|
|
|
x = fx;
|
|
y = fy;
|
|
}
|
|
|
|
if (round)
|
|
{
|
|
tx = SIGNED_ROUND (((gdouble) x + shell->offset_x) / shell->scale_x);
|
|
ty = SIGNED_ROUND (((gdouble) y + shell->offset_y) / shell->scale_y);
|
|
}
|
|
else
|
|
{
|
|
tx = ((gint64) x + shell->offset_x) / shell->scale_x;
|
|
ty = ((gint64) y + shell->offset_y) / shell->scale_y;
|
|
}
|
|
|
|
*nx = CLAMP (tx, G_MININT, G_MAXINT);
|
|
*ny = CLAMP (ty, G_MININT, G_MAXINT);
|
|
}
|
|
|
|
/**
|
|
* gimp_display_shell_transform_xy_f:
|
|
* @shell: a #GimpDisplayShell
|
|
* @x: image x coordinate of point
|
|
* @y: image y coordinate of point
|
|
* @nx: returned shell canvas x coordinate
|
|
* @ny: returned shell canvas y coordinate
|
|
*
|
|
* Transforms from image coordinates to display shell canvas
|
|
* coordinates.
|
|
**/
|
|
void
|
|
gimp_display_shell_transform_xy_f (GimpDisplayShell *shell,
|
|
gdouble x,
|
|
gdouble y,
|
|
gdouble *nx,
|
|
gdouble *ny)
|
|
{
|
|
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
|
|
g_return_if_fail (nx != NULL);
|
|
g_return_if_fail (ny != NULL);
|
|
|
|
*nx = SCALEX (shell, x) - shell->offset_x;
|
|
*ny = SCALEY (shell, y) - shell->offset_y;
|
|
|
|
if (shell->rotate_transform)
|
|
cairo_matrix_transform_point (shell->rotate_transform, nx, ny);
|
|
}
|
|
|
|
/**
|
|
* gimp_display_shell_untransform_xy_f:
|
|
* @shell: a #GimpDisplayShell
|
|
* @x: x coordinate in display coordinates
|
|
* @y: y coordinate in display coordinates
|
|
* @nx: place to return x coordinate in image coordinates
|
|
* @ny: place to return y coordinate in image coordinates
|
|
*
|
|
* This function is identical to gimp_display_shell_untransform_xy(),
|
|
* except that the input and output coordinates are doubles rather than
|
|
* ints, and consequently there is no option related to rounding.
|
|
**/
|
|
void
|
|
gimp_display_shell_untransform_xy_f (GimpDisplayShell *shell,
|
|
gdouble x,
|
|
gdouble y,
|
|
gdouble *nx,
|
|
gdouble *ny)
|
|
{
|
|
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
|
|
g_return_if_fail (nx != NULL);
|
|
g_return_if_fail (ny != NULL);
|
|
|
|
if (shell->rotate_untransform)
|
|
cairo_matrix_transform_point (shell->rotate_untransform, &x, &y);
|
|
|
|
*nx = (x + shell->offset_x) / shell->scale_x;
|
|
*ny = (y + shell->offset_y) / shell->scale_y;
|
|
}
|
|
|
|
void
|
|
gimp_display_shell_transform_bounds (GimpDisplayShell *shell,
|
|
gdouble x1,
|
|
gdouble y1,
|
|
gdouble x2,
|
|
gdouble y2,
|
|
gdouble *nx1,
|
|
gdouble *ny1,
|
|
gdouble *nx2,
|
|
gdouble *ny2)
|
|
{
|
|
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
|
|
g_return_if_fail (nx1 != NULL);
|
|
g_return_if_fail (ny1 != NULL);
|
|
g_return_if_fail (nx2 != NULL);
|
|
g_return_if_fail (ny2 != NULL);
|
|
|
|
if (shell->rotate_transform)
|
|
{
|
|
gdouble tx1, ty1;
|
|
gdouble tx2, ty2;
|
|
gdouble tx3, ty3;
|
|
gdouble tx4, ty4;
|
|
|
|
gimp_display_shell_transform_xy_f (shell, x1, y1, &tx1, &ty1);
|
|
gimp_display_shell_transform_xy_f (shell, x1, y2, &tx2, &ty2);
|
|
gimp_display_shell_transform_xy_f (shell, x2, y1, &tx3, &ty3);
|
|
gimp_display_shell_transform_xy_f (shell, x2, y2, &tx4, &ty4);
|
|
|
|
*nx1 = MIN4 (tx1, tx2, tx3, tx4);
|
|
*ny1 = MIN4 (ty1, ty2, ty3, ty4);
|
|
*nx2 = MAX4 (tx1, tx2, tx3, tx4);
|
|
*ny2 = MAX4 (ty1, ty2, ty3, ty4);
|
|
}
|
|
else
|
|
{
|
|
gimp_display_shell_transform_xy_f (shell, x1, y1, nx1, ny1);
|
|
gimp_display_shell_transform_xy_f (shell, x2, y2, nx2, ny2);
|
|
}
|
|
}
|
|
|
|
void
|
|
gimp_display_shell_untransform_bounds (GimpDisplayShell *shell,
|
|
gdouble x1,
|
|
gdouble y1,
|
|
gdouble x2,
|
|
gdouble y2,
|
|
gdouble *nx1,
|
|
gdouble *ny1,
|
|
gdouble *nx2,
|
|
gdouble *ny2)
|
|
{
|
|
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
|
|
g_return_if_fail (nx1 != NULL);
|
|
g_return_if_fail (ny1 != NULL);
|
|
g_return_if_fail (nx2 != NULL);
|
|
g_return_if_fail (ny2 != NULL);
|
|
|
|
if (shell->rotate_untransform)
|
|
{
|
|
gdouble tx1, ty1;
|
|
gdouble tx2, ty2;
|
|
gdouble tx3, ty3;
|
|
gdouble tx4, ty4;
|
|
|
|
gimp_display_shell_untransform_xy_f (shell, x1, y1, &tx1, &ty1);
|
|
gimp_display_shell_untransform_xy_f (shell, x1, y2, &tx2, &ty2);
|
|
gimp_display_shell_untransform_xy_f (shell, x2, y1, &tx3, &ty3);
|
|
gimp_display_shell_untransform_xy_f (shell, x2, y2, &tx4, &ty4);
|
|
|
|
*nx1 = MIN4 (tx1, tx2, tx3, tx4);
|
|
*ny1 = MIN4 (ty1, ty2, ty3, ty4);
|
|
*nx2 = MAX4 (tx1, tx2, tx3, tx4);
|
|
*ny2 = MAX4 (ty1, ty2, ty3, ty4);
|
|
}
|
|
else
|
|
{
|
|
gimp_display_shell_untransform_xy_f (shell, x1, y1, nx1, ny1);
|
|
gimp_display_shell_untransform_xy_f (shell, x2, y2, nx2, ny2);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gimp_display_shell_untransform_viewport:
|
|
* @shell: a #GimpDisplayShell
|
|
* @x: returns image x coordinate of display upper left corner
|
|
* @y: returns image y coordinate of display upper left corner
|
|
* @width: returns width of display measured in image coordinates
|
|
* @height: returns height of display measured in image coordinates
|
|
*
|
|
* This function calculates the part of the image, im image coordinates,
|
|
* that corresponds to the display viewport.
|
|
**/
|
|
void
|
|
gimp_display_shell_untransform_viewport (GimpDisplayShell *shell,
|
|
gint *x,
|
|
gint *y,
|
|
gint *width,
|
|
gint *height)
|
|
{
|
|
GimpImage *image;
|
|
gint x1, y1, x2, y2;
|
|
|
|
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
|
|
|
|
gimp_display_shell_untransform_xy (shell,
|
|
0, 0,
|
|
&x1, &y1,
|
|
FALSE);
|
|
gimp_display_shell_untransform_xy (shell,
|
|
shell->disp_width, shell->disp_height,
|
|
&x2, &y2,
|
|
FALSE);
|
|
|
|
image = gimp_display_get_image (shell->display);
|
|
|
|
if (x1 < 0)
|
|
x1 = 0;
|
|
|
|
if (y1 < 0)
|
|
y1 = 0;
|
|
|
|
if (x2 > gimp_image_get_width (image))
|
|
x2 = gimp_image_get_width (image);
|
|
|
|
if (y2 > gimp_image_get_height (image))
|
|
y2 = gimp_image_get_height (image);
|
|
|
|
if (x) *x = x1;
|
|
if (y) *y = y1;
|
|
if (width) *width = x2 - x1;
|
|
if (height) *height = y2 - y1;
|
|
}
|