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9785c4e1a3
by not manually intersecting and subtracting regions at all. Simply clip the cairo_t to the area we want to render, it will automatically intersect with the clip region from the expose event, and check if the clip is empty before actually drawing anything.
549 lines
17 KiB
C
549 lines
17 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 "libgimpwidgets/gimpwidgets.h"
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#include "display-types.h"
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#include "core/gimp.h"
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#include "core/gimpimage.h"
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#include "core/gimpimage-quick-mask.h"
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#include "widgets/gimpcairo-wilber.h"
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#include "widgets/gimpuimanager.h"
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#include "gimpcanvasitem.h"
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#include "gimpdisplay.h"
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#include "gimpdisplayshell.h"
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#include "gimpdisplayshell-appearance.h"
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#include "gimpdisplayshell-callbacks.h"
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#include "gimpdisplayshell-draw.h"
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#include "gimpdisplayshell-scale.h"
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#include "gimpdisplayshell-scroll.h"
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#include "gimpdisplayshell-selection.h"
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#include "gimpdisplayshell-title.h"
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#include "gimpdisplayxfer.h"
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#include "gimpimagewindow.h"
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#include "gimpnavigationeditor.h"
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/* local function prototypes */
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static void gimp_display_shell_vadjustment_changed (GtkAdjustment *adjustment,
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GimpDisplayShell *shell);
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static void gimp_display_shell_hadjustment_changed (GtkAdjustment *adjustment,
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GimpDisplayShell *shell);
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static gboolean gimp_display_shell_vscrollbar_change_value (GtkRange *range,
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GtkScrollType scroll,
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gdouble value,
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GimpDisplayShell *shell);
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static gboolean gimp_display_shell_hscrollbar_change_value (GtkRange *range,
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GtkScrollType scroll,
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gdouble value,
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GimpDisplayShell *shell);
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static void gimp_display_shell_canvas_draw_image (GimpDisplayShell *shell,
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cairo_t *cr);
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static void gimp_display_shell_canvas_draw_drop_zone (GimpDisplayShell *shell,
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cairo_t *cr);
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/* public functions */
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void
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gimp_display_shell_canvas_realize (GtkWidget *canvas,
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GimpDisplayShell *shell)
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{
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GimpCanvasPaddingMode padding_mode;
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GimpRGB padding_color;
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GtkAllocation allocation;
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gtk_widget_grab_focus (canvas);
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gimp_display_shell_get_padding (shell, &padding_mode, &padding_color);
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gimp_display_shell_set_padding (shell, padding_mode, &padding_color);
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gtk_widget_get_allocation (canvas, &allocation);
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gimp_display_shell_title_update (shell);
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shell->disp_width = allocation.width;
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shell->disp_height = allocation.height;
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/* set up the scrollbar observers */
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g_signal_connect (shell->hsbdata, "value-changed",
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G_CALLBACK (gimp_display_shell_hadjustment_changed),
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shell);
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g_signal_connect (shell->vsbdata, "value-changed",
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G_CALLBACK (gimp_display_shell_vadjustment_changed),
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shell);
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g_signal_connect (shell->hsb, "change-value",
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G_CALLBACK (gimp_display_shell_hscrollbar_change_value),
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shell);
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g_signal_connect (shell->vsb, "change-value",
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G_CALLBACK (gimp_display_shell_vscrollbar_change_value),
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shell);
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/* allow shrinking */
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gtk_widget_set_size_request (GTK_WIDGET (shell), 0, 0);
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shell->xfer = gimp_display_xfer_realize (GTK_WIDGET(shell));
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}
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void
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gimp_display_shell_canvas_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation,
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GimpDisplayShell *shell)
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{
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/* are we in destruction? */
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if (! shell->display || ! gimp_display_get_shell (shell->display))
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return;
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if ((shell->disp_width != allocation->width) ||
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(shell->disp_height != allocation->height))
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{
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if (shell->zoom_on_resize &&
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shell->disp_width > 64 &&
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shell->disp_height > 64 &&
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allocation->width > 64 &&
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allocation->height > 64)
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{
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gdouble scale = gimp_zoom_model_get_factor (shell->zoom);
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gint offset_x;
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gint offset_y;
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/* FIXME: The code is a bit of a mess */
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/* multiply the zoom_factor with the ratio of the new and
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* old canvas diagonals
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*/
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scale *= (sqrt (SQR (allocation->width) +
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SQR (allocation->height)) /
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sqrt (SQR (shell->disp_width) +
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SQR (shell->disp_height)));
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offset_x = UNSCALEX (shell, shell->offset_x);
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offset_y = UNSCALEX (shell, shell->offset_y);
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gimp_zoom_model_zoom (shell->zoom, GIMP_ZOOM_TO, scale);
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shell->offset_x = SCALEX (shell, offset_x);
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shell->offset_y = SCALEY (shell, offset_y);
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}
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shell->disp_width = allocation->width;
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shell->disp_height = allocation->height;
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/* When we size-allocate due to resize of the top level window,
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* we want some additional logic. Don't apply it on
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* zoom_on_resize though.
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*/
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if (shell->size_allocate_from_configure_event &&
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! shell->zoom_on_resize)
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{
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gboolean center_horizontally;
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gboolean center_vertically;
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gint target_offset_x;
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gint target_offset_y;
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gint sw;
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gint sh;
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gimp_display_shell_scale_get_image_size (shell, &sw, &sh);
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center_horizontally = sw <= shell->disp_width;
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center_vertically = sh <= shell->disp_height;
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gimp_display_shell_scroll_center_image (shell,
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center_horizontally,
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center_vertically);
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/* This is basically the best we can do before we get an
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* API for storing the image offset at the start of an
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* image window resize using the mouse
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*/
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target_offset_x = shell->offset_x;
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target_offset_y = shell->offset_y;
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if (! center_horizontally)
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{
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target_offset_x = MAX (shell->offset_x, 0);
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}
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if (! center_vertically)
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{
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target_offset_y = MAX (shell->offset_y, 0);
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}
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gimp_display_shell_scroll_set_offset (shell,
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target_offset_x,
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target_offset_y);
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}
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gimp_display_shell_scroll_clamp_and_update (shell);
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gimp_display_shell_scaled (shell);
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/* Reset */
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shell->size_allocate_from_configure_event = FALSE;
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}
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}
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static gboolean
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gimp_display_shell_is_double_buffered (GimpDisplayShell *shell)
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{
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return TRUE; /* FIXME: repair this after cairo tool drawing is done */
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/* always double-buffer if there are overlay children or a
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* transform preview, or they will flicker badly. Also double
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* buffer when we are editing paths.
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*/
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#if 0
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if (GIMP_OVERLAY_BOX (shell->canvas)->children ||
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gimp_display_shell_get_show_transform (shell) ||
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GIMP_IS_VECTOR_TOOL (tool_manager_get_active (shell->display->gimp)))
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return TRUE;
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#endif
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return FALSE;
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}
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gboolean
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gimp_display_shell_canvas_expose (GtkWidget *widget,
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GdkEventExpose *eevent,
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GimpDisplayShell *shell)
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{
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/* are we in destruction? */
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if (! shell->display || ! gimp_display_get_shell (shell->display))
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return TRUE;
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/* ignore events on overlays */
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if (eevent->window == gtk_widget_get_window (widget))
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{
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cairo_t *cr;
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if (gimp_display_get_image (shell->display))
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{
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if (gimp_display_shell_is_double_buffered (shell))
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gdk_window_begin_paint_region (eevent->window, eevent->region);
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}
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/* create the cairo_t after enabling double buffering, or we
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* will get the wrong window destination surface
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*/
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cr = gdk_cairo_create (gtk_widget_get_window (shell->canvas));
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gdk_cairo_region (cr, eevent->region);
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cairo_clip (cr);
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if (gimp_display_get_image (shell->display))
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{
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gimp_display_shell_canvas_draw_image (shell, cr);
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}
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else
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{
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gimp_display_shell_canvas_draw_drop_zone (shell, cr);
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}
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cairo_destroy (cr);
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}
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return FALSE;
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}
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gboolean
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gimp_display_shell_canvas_expose_after (GtkWidget *widget,
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GdkEventExpose *eevent,
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GimpDisplayShell *shell)
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{
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/* are we in destruction? */
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if (! shell->display || ! gimp_display_get_shell (shell->display))
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return TRUE;
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/* ignore events on overlays */
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if (eevent->window == gtk_widget_get_window (widget))
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{
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if (gimp_display_get_image (shell->display))
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{
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if (gimp_display_shell_is_double_buffered (shell))
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gdk_window_end_paint (eevent->window);
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}
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}
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return FALSE;
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}
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gboolean
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gimp_display_shell_origin_button_press (GtkWidget *widget,
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GdkEventButton *event,
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GimpDisplayShell *shell)
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{
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if (! shell->display->gimp->busy)
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{
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if (event->type == GDK_BUTTON_PRESS && event->button == 1)
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{
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gboolean unused;
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g_signal_emit_by_name (shell, "popup-menu", &unused);
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}
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}
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/* Return TRUE to stop signal emission so the button doesn't grab the
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* pointer away from us.
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*/
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return TRUE;
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}
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gboolean
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gimp_display_shell_quick_mask_button_press (GtkWidget *widget,
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GdkEventButton *bevent,
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GimpDisplayShell *shell)
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{
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if (! gimp_display_get_image (shell->display))
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return TRUE;
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if (gdk_event_triggers_context_menu ((GdkEvent *) bevent))
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{
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GimpImageWindow *window = gimp_display_shell_get_window (shell);
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if (window)
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{
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GimpUIManager *manager = gimp_image_window_get_ui_manager (window);
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gimp_ui_manager_ui_popup (manager,
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"/quick-mask-popup",
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GTK_WIDGET (shell),
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NULL, NULL, NULL, NULL);
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}
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return TRUE;
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}
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return FALSE;
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}
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void
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gimp_display_shell_quick_mask_toggled (GtkWidget *widget,
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GimpDisplayShell *shell)
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{
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GimpImage *image = gimp_display_get_image (shell->display);
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gboolean active = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget));
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if (active != gimp_image_get_quick_mask_state (image))
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{
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gimp_image_set_quick_mask_state (image, active);
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gimp_image_flush (image);
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}
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}
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gboolean
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gimp_display_shell_navigation_button_press (GtkWidget *widget,
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GdkEventButton *bevent,
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GimpDisplayShell *shell)
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{
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if (! gimp_display_get_image (shell->display))
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return TRUE;
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if (bevent->type == GDK_BUTTON_PRESS && bevent->button == 1)
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{
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gimp_navigation_editor_popup (shell, widget, bevent->x, bevent->y);
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}
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return TRUE;
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}
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/* private functions */
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static void
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gimp_display_shell_vadjustment_changed (GtkAdjustment *adjustment,
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GimpDisplayShell *shell)
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{
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/* If we are panning with mouse, scrollbars are to be ignored or
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* they will cause jitter in motion
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*/
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if (! shell->scrolling)
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gimp_display_shell_scroll (shell,
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0,
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gtk_adjustment_get_value (adjustment) -
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shell->offset_y);
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}
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static void
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gimp_display_shell_hadjustment_changed (GtkAdjustment *adjustment,
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GimpDisplayShell *shell)
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{
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/* If we are panning with mouse, scrollbars are to be ignored or
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* they will cause jitter in motion
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*/
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if (! shell->scrolling)
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gimp_display_shell_scroll (shell,
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gtk_adjustment_get_value (adjustment) -
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shell->offset_x,
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0);
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}
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static gboolean
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gimp_display_shell_hscrollbar_change_value (GtkRange *range,
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GtkScrollType scroll,
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gdouble value,
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GimpDisplayShell *shell)
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{
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if (! shell->display)
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return TRUE;
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if ((scroll == GTK_SCROLL_JUMP) ||
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(scroll == GTK_SCROLL_PAGE_BACKWARD) ||
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(scroll == GTK_SCROLL_PAGE_FORWARD))
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return FALSE;
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g_object_freeze_notify (G_OBJECT (shell->hsbdata));
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gimp_display_shell_scroll_setup_hscrollbar (shell, value);
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g_object_thaw_notify (G_OBJECT (shell->hsbdata)); /* emits "changed" */
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return FALSE;
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}
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static gboolean
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gimp_display_shell_vscrollbar_change_value (GtkRange *range,
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GtkScrollType scroll,
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gdouble value,
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GimpDisplayShell *shell)
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{
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if (! shell->display)
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return TRUE;
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if ((scroll == GTK_SCROLL_JUMP) ||
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(scroll == GTK_SCROLL_PAGE_BACKWARD) ||
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(scroll == GTK_SCROLL_PAGE_FORWARD))
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return FALSE;
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g_object_freeze_notify (G_OBJECT (shell->vsbdata));
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gimp_display_shell_scroll_setup_vscrollbar (shell, value);
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g_object_thaw_notify (G_OBJECT (shell->vsbdata)); /* emits "changed" */
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return FALSE;
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}
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static void
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gimp_display_shell_canvas_draw_image (GimpDisplayShell *shell,
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cairo_t *cr)
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{
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cairo_rectangle_int_t image_rect;
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image_rect.x = - shell->offset_x;
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image_rect.y = - shell->offset_y;
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gimp_display_shell_scale_get_image_size (shell,
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&image_rect.width,
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&image_rect.height);
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/* first, clear the exposed part of the region that is outside the
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* image, which is the exposed region minus the image rectangle
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*/
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cairo_save (cr);
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cairo_rectangle (cr,
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image_rect.x,
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image_rect.y,
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image_rect.width,
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image_rect.height);
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cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
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cairo_clip (cr);
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if (gdk_cairo_get_clip_rectangle (cr, NULL))
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gimp_display_shell_draw_background (shell, cr);
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cairo_restore (cr);
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/* then, draw the exposed part of the region that is inside the
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* image
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*/
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cairo_save (cr);
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cairo_rectangle (cr,
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image_rect.x,
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image_rect.y,
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image_rect.width,
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image_rect.height);
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cairo_clip (cr);
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if (gdk_cairo_get_clip_rectangle (cr, NULL))
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{
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cairo_rectangle_list_t *clip_rectangles;
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gint i;
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cairo_save (cr);
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gimp_display_shell_draw_checkerboard (shell, cr,
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image_rect.x,
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image_rect.y,
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image_rect.width,
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image_rect.height);
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cairo_restore (cr);
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clip_rectangles = cairo_copy_clip_rectangle_list (cr);
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for (i = 0; i < clip_rectangles->num_rectangles; i++)
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{
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cairo_rectangle_t rect = clip_rectangles->rectangles[i];
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gimp_display_shell_draw_image (shell, cr,
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floor (rect.x),
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floor (rect.y),
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ceil (rect.width),
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ceil (rect.height));
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}
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cairo_rectangle_list_destroy (clip_rectangles);
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}
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cairo_restore (cr);
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/* finally, draw all the remaining image window stuff on top
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*/
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/* draw canvas items */
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gimp_canvas_item_draw (shell->canvas_item, cr);
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/* restart (and recalculate) the selection boundaries */
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gimp_display_shell_selection_restart (shell);
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}
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static void
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gimp_display_shell_canvas_draw_drop_zone (GimpDisplayShell *shell,
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cairo_t *cr)
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{
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gimp_display_shell_draw_background (shell, cr);
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gimp_cairo_draw_drop_wilber (shell->canvas, cr);
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}
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