+/*
+ * GQview
+ * (C) 2005 John Ellis
+ *
+ * Author: John Ellis
+ *
+ * This software is released under the GNU General Public License (GNU GPL).
+ * Please read the included file COPYING for more information.
+ * This software comes with no warranty of any kind, use at your own risk!
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include "pixbuf-renderer.h"
+#include "intl.h"
+
+#include <gtk/gtk.h>
+
+
+/* comment this out if not using this from within GQview
+ * defining GQVIEW_BUILD does these things:
+ * - Sets the shift-click scroller pixbuf to a nice icon instead of a black box
+ */
+#define GQVIEW_BUILD 1
+
+
+#ifdef GQVIEW_BUILD
+ #include "pixbuf_util.h"
+#endif
+
+
+/* size to use when breaking up image pane for rendering */
+#define PR_TILE_SIZE 128
+
+/* default size of tile cache (mb) */
+#define PR_CACHE_SIZE_DEFAULT 8
+
+/* default min and max zoom */
+#define PR_ZOOM_MIN -32.0
+#define PR_ZOOM_MAX 32.0
+
+/* distance to drag mouse to disable image flip */
+#define PR_DRAG_SCROLL_THRESHHOLD 4
+
+/* increase pan rate when holding down shift */
+#define PR_PAN_SHIFT_MULTIPLIER 6
+
+/* scroller config */
+#define PR_SCROLLER_UPDATES_PER_SEC 30
+#define PR_SCROLLER_DEAD_ZONE 6
+
+/* alpha channel checkerboard background (same as gimp) */
+#define PR_ALPHA_CHECK1 0x00999999
+#define PR_ALPHA_CHECK2 0x00666666
+#define PR_ALPHA_CHECK_SIZE 16
+
+/* when scaling image to below this size, use nearest pixel for scaling
+ * (below about 4, the other scale types become slow generating their conversion tables)
+ */
+#define PR_MIN_SCALE_SIZE 8
+
+
+typedef enum {
+ TILE_RENDER_NONE = 0, /* do nothing */
+ TILE_RENDER_AREA, /* render an area of the tile */
+ TILE_RENDER_ALL /* render the whole tile */
+} ImageTileRenderType;
+
+typedef struct _ImageTile ImageTile;
+typedef struct _QueueData QueueData;
+
+struct _ImageTile
+{
+ GdkPixmap *pixmap; /* off screen buffer */
+ GdkPixbuf *pixbuf; /* pixbuf area for zooming */
+ gint x; /* x offset into image */
+ gint y; /* y offset into image */
+ gint w; /* width that is visible (may be less if at edge of image) */
+ gint h; /* height '' */
+
+ gboolean blank;
+
+/* render_todo: (explanation)
+ NONE do nothing
+ AREA render area of tile, usually only used when loading an image
+ note: will jump to an ALL if render_done is not ALL.
+ ALL render entire tile, if never done before w/ ALL, for expose events *only*
+*/
+
+ ImageTileRenderType render_todo; /* what to do (see above) */
+ ImageTileRenderType render_done; /* highest that has been done before on tile */
+
+ QueueData *qd;
+ QueueData *qd2;
+
+ guint size; /* est. memory used by pixmap and pixbuf */
+};
+
+struct _QueueData
+{
+ ImageTile *it;
+ gint x;
+ gint y;
+ gint w;
+ gint h;
+ gboolean new_data;
+};
+
+typedef struct _SourceTile SourceTile;
+struct _SourceTile
+{
+ gint x;
+ gint y;
+ GdkPixbuf *pixbuf;
+ gboolean blank;
+};
+
+typedef struct _OverlayData OverlayData;
+struct _OverlayData
+{
+ gint id;
+
+ GdkPixbuf *pixbuf;
+
+ gint x;
+ gint y;
+ gint relative; /* x,y coordinates are relative, negative values start bottom right */
+
+ gint visible;
+ gint always; /* hide temporarily when scrolling */
+};
+
+enum {
+ SIGNAL_ZOOM = 0,
+ SIGNAL_CLICKED,
+ SIGNAL_SCROLL_NOTIFY,
+ SIGNAL_COUNT
+};
+
+enum {
+ PROP_0,
+ PROP_ZOOM_MIN,
+ PROP_ZOOM_MAX,
+ PROP_ZOOM_QUALITY,
+ PROP_ZOOM_2PASS,
+ PROP_ZOOM_EXPAND,
+ PROP_DITHER_QUALITY,
+ PROP_SCROLL_RESET,
+ PROP_DELAY_FLIP,
+ PROP_LOADING,
+ PROP_CACHE_SIZE_DISPLAY,
+ PROP_CACHE_SIZE_TILES,
+ PROP_WINDOW_FIT,
+ PROP_WINDOW_LIMIT,
+ PROP_WINDOW_LIMIT_VALUE
+};
+
+
+
+static guint signals[SIGNAL_COUNT] = { 0 };
+static GtkEventBoxClass *parent_class = NULL;
+
+
+
+static void pixbuf_renderer_class_init(PixbufRendererClass *class);
+static void pixbuf_renderer_init(PixbufRenderer *pr);
+static void pixbuf_renderer_finalize(GObject *object);
+static void pixbuf_renderer_set_property(GObject *object, guint prop_id,
+ const GValue *value, GParamSpec *pspec);
+static void pixbuf_renderer_get_property(GObject *object, guint prop_id,
+ GValue *value, GParamSpec *pspec);
+static gint pixbuf_renderer_expose(GtkWidget *widget, GdkEventExpose *event);
+
+
+static void pr_overlay_list_clear(PixbufRenderer *pr);
+static void pr_scroller_timer_set(PixbufRenderer *pr, gint start);
+static void pr_border_draw(PixbufRenderer *pr, gint x, gint y, gint w, gint h);
+
+
+static void pr_source_tile_free_all(PixbufRenderer *pr);
+static void pr_tile_free_all(PixbufRenderer *pr);
+static void pr_tile_invalidate_region(PixbufRenderer *pr, gint x, gint y, gint w, gint h);
+static gint pr_tile_is_visible(PixbufRenderer *pr, ImageTile *it);
+static void pr_queue_clear(PixbufRenderer *pr);
+static void pr_queue_merge(QueueData *parent, QueueData *qd);
+static void pr_queue(PixbufRenderer *pr, gint x, gint y, gint w, gint h,
+ gint clamp, ImageTileRenderType render, gint new_data);
+
+static void pr_redraw(PixbufRenderer *pr, gint new_data);
+
+static void pr_zoom_sync(PixbufRenderer *pr, gdouble zoom,
+ gint force, gint blank, gint new,
+ gint center_point, gint px, gint py);
+
+static void pr_signals_connect(PixbufRenderer *pr);
+static void pr_size_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer data);
+static void pixbuf_renderer_paint(PixbufRenderer *pr, GdkRectangle *area);
+
+
+/*
+ *-------------------------------------------------------------------
+ * Pixbuf Renderer object
+ *-------------------------------------------------------------------
+ */
+
+GType pixbuf_renderer_get_type(void)
+{
+ static GType pixbuf_renderer_type = 0;
+
+ if (!pixbuf_renderer_type)
+ {
+ static const GTypeInfo pixbuf_renderer_info =
+ {
+ sizeof(PixbufRendererClass),
+ NULL, /* base_init */
+ NULL, /* base_finalize */
+ (GClassInitFunc)pixbuf_renderer_class_init,
+ NULL, /* class_finalize */
+ NULL, /* class_data */
+ sizeof(PixbufRenderer),
+ 0, /* n_preallocs */
+ (GInstanceInitFunc)pixbuf_renderer_init,
+ };
+
+ pixbuf_renderer_type = g_type_register_static(GTK_TYPE_EVENT_BOX, "PixbufRenderer",
+ &pixbuf_renderer_info, 0);
+ }
+
+ return pixbuf_renderer_type;
+}
+
+static void pixbuf_renderer_class_init(PixbufRendererClass *class)
+{
+ GObjectClass *gobject_class = G_OBJECT_CLASS(class);
+ GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(class);
+
+ parent_class = g_type_class_peek_parent(class);
+
+ gobject_class->set_property = pixbuf_renderer_set_property;
+ gobject_class->get_property = pixbuf_renderer_get_property;
+
+ gobject_class->finalize = pixbuf_renderer_finalize;
+
+ widget_class->expose_event = pixbuf_renderer_expose;
+
+ g_object_class_install_property(gobject_class,
+ PROP_ZOOM_MIN,
+ g_param_spec_double("zoom_min",
+ "Zoom minimum",
+ NULL,
+ -1000.0,
+ 1000.0,
+ PR_ZOOM_MIN,
+ G_PARAM_READABLE | G_PARAM_WRITABLE));
+
+ g_object_class_install_property(gobject_class,
+ PROP_ZOOM_MAX,
+ g_param_spec_double("zoom_max",
+ "Zoom maximum",
+ NULL,
+ -1000.0,
+ 1000.0,
+ PR_ZOOM_MIN,
+ G_PARAM_READABLE | G_PARAM_WRITABLE));
+
+ g_object_class_install_property(gobject_class,
+ PROP_ZOOM_QUALITY,
+ g_param_spec_uint("zoom_quality",
+ "Zoom quality",
+ NULL,
+ GDK_INTERP_NEAREST,
+ GDK_INTERP_HYPER,
+ GDK_INTERP_BILINEAR,
+ G_PARAM_READABLE | G_PARAM_WRITABLE));
+
+ g_object_class_install_property(gobject_class,
+ PROP_ZOOM_2PASS,
+ g_param_spec_boolean("zoom_2pass",
+ "2 pass zoom",
+ NULL,
+ TRUE,
+ G_PARAM_READABLE | G_PARAM_WRITABLE));
+
+ g_object_class_install_property(gobject_class,
+ PROP_ZOOM_EXPAND,
+ g_param_spec_boolean("zoom_expand",
+ "Expand image in autozoom.",
+ NULL,
+ FALSE,
+ G_PARAM_READABLE | G_PARAM_WRITABLE));
+
+ g_object_class_install_property(gobject_class,
+ PROP_DITHER_QUALITY,
+ g_param_spec_uint("dither_quality",
+ "Dither quality",
+ NULL,
+ GDK_RGB_DITHER_NONE,
+ GDK_RGB_DITHER_MAX,
+ GDK_RGB_DITHER_NORMAL,
+ G_PARAM_READABLE | G_PARAM_WRITABLE));
+
+ g_object_class_install_property(gobject_class,
+ PROP_SCROLL_RESET,
+ g_param_spec_uint("scroll_reset",
+ "New image scroll reset",
+ NULL,
+ PR_SCROLL_RESET_TOPLEFT,
+ PR_SCROLL_RESET_NOCHANGE,
+ PR_SCROLL_RESET_TOPLEFT,
+ G_PARAM_READABLE | G_PARAM_WRITABLE));
+
+ g_object_class_install_property(gobject_class,
+ PROP_DELAY_FLIP,
+ g_param_spec_boolean("delay_flip",
+ "Delay image update",
+ NULL,
+ FALSE,
+ G_PARAM_READABLE | G_PARAM_WRITABLE));
+
+ g_object_class_install_property(gobject_class,
+ PROP_LOADING,
+ g_param_spec_boolean("loading",
+ "Image actively loading",
+ NULL,
+ FALSE,
+ G_PARAM_READABLE | G_PARAM_WRITABLE));
+
+ g_object_class_install_property(gobject_class,
+ PROP_CACHE_SIZE_DISPLAY,
+ g_param_spec_uint("cache_display",
+ "Display cache size MB",
+ NULL,
+ 0,
+ 128,
+ PR_CACHE_SIZE_DEFAULT,
+ G_PARAM_READABLE | G_PARAM_WRITABLE));
+
+ g_object_class_install_property(gobject_class,
+ PROP_CACHE_SIZE_TILES,
+ g_param_spec_uint("cache_tiles",
+ "Tile cache count",
+ "Number of tiles to retain in memory at any one time.",
+ 0,
+ 256,
+ PR_CACHE_SIZE_DEFAULT,
+ G_PARAM_READABLE | G_PARAM_WRITABLE));
+
+ g_object_class_install_property(gobject_class,
+ PROP_WINDOW_FIT,
+ g_param_spec_boolean("window_fit",
+ "Fit window to image size",
+ NULL,
+ FALSE,
+ G_PARAM_READABLE | G_PARAM_WRITABLE));
+
+ g_object_class_install_property(gobject_class,
+ PROP_WINDOW_LIMIT,
+ g_param_spec_boolean("window_limit",
+ "Limit size of parent window",
+ NULL,
+ FALSE,
+ G_PARAM_READABLE | G_PARAM_WRITABLE));
+
+ g_object_class_install_property(gobject_class,
+ PROP_WINDOW_LIMIT_VALUE,
+ g_param_spec_uint("window_limit_value",
+ "Size limit of parent window",
+ NULL,
+ 10,
+ 150,
+ 100,
+ G_PARAM_READABLE | G_PARAM_WRITABLE));
+
+ signals[SIGNAL_ZOOM] =
+ g_signal_new("zoom",
+ G_OBJECT_CLASS_TYPE(gobject_class),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET(PixbufRendererClass, zoom),
+ NULL, NULL,
+ g_cclosure_marshal_VOID__DOUBLE,
+ G_TYPE_NONE, 1,
+ G_TYPE_DOUBLE);
+
+ signals[SIGNAL_CLICKED] =
+ g_signal_new("clicked",
+ G_OBJECT_CLASS_TYPE(gobject_class),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET(PixbufRendererClass, clicked),
+ NULL, NULL,
+ g_cclosure_marshal_VOID__BOXED,
+ G_TYPE_NONE, 1,
+ GDK_TYPE_EVENT);
+
+ signals[SIGNAL_SCROLL_NOTIFY] =
+ g_signal_new("scroll-notify",
+ G_OBJECT_CLASS_TYPE(gobject_class),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET(PixbufRendererClass, scroll_notify),
+ NULL, NULL,
+ g_cclosure_marshal_VOID__VOID,
+ G_TYPE_NONE, 0);
+}
+
+static void pixbuf_renderer_init(PixbufRenderer *pr)
+{
+ GtkWidget *box;
+
+ box = GTK_WIDGET(pr);
+
+ pr->zoom_min = PR_ZOOM_MIN;
+ pr->zoom_max = PR_ZOOM_MAX;
+ pr->zoom_quality = GDK_INTERP_BILINEAR;
+ pr->zoom_2pass = FALSE;
+
+ pr->zoom = 1.0;
+ pr->scale = 1.0;
+
+ pr->dither_quality = GDK_RGB_DITHER_NORMAL;
+
+ pr->scroll_reset = PR_SCROLL_RESET_TOPLEFT;
+
+ pr->draw_idle_id = -1;
+
+ pr->tile_width = PR_TILE_SIZE;
+ pr->tile_height = PR_TILE_SIZE;
+
+ pr->tiles = NULL;
+ pr->tile_cache_size = 0;
+
+ pr->tile_cache_max = PR_CACHE_SIZE_DEFAULT;
+
+ pr->scroller_id = -1;
+ pr->scroller_overlay = -1;
+
+ pr->source_tiles_enabled = FALSE;
+ pr->source_tiles = NULL;
+
+ gtk_widget_set_double_buffered(box, FALSE);
+ g_signal_connect_after(G_OBJECT(box), "size_allocate",
+ G_CALLBACK(pr_size_cb), pr);
+
+ pr_signals_connect(pr);
+}
+
+static void pixbuf_renderer_finalize(GObject *object)
+{
+ PixbufRenderer *pr;
+
+ pr = PIXBUF_RENDERER(object);
+
+ pr_queue_clear(pr);
+ pr_tile_free_all(pr);
+
+ if (pr->pixbuf) g_object_unref(pr->pixbuf);
+
+ pr_scroller_timer_set(pr, FALSE);
+ pr_overlay_list_clear(pr);
+
+ pr_source_tile_free_all(pr);
+}
+
+PixbufRenderer* pixbuf_renderer_new(void)
+{
+ return g_object_new(TYPE_PIXBUF_RENDERER, NULL);
+}
+
+static void pixbuf_renderer_set_property(GObject *object, guint prop_id,
+ const GValue *value, GParamSpec *pspec)
+{
+ PixbufRenderer *pr;
+
+ pr = PIXBUF_RENDERER(object);
+
+ switch (prop_id)
+ {
+ case PROP_ZOOM_MIN:
+ pr->zoom_min = g_value_get_double(value);
+ break;
+ case PROP_ZOOM_MAX:
+ pr->zoom_max = g_value_get_double(value);
+ break;
+ case PROP_ZOOM_QUALITY:
+ pr->zoom_quality = g_value_get_uint(value);
+ break;
+ case PROP_ZOOM_2PASS:
+ pr->zoom_2pass = g_value_get_boolean(value);
+ break;
+ case PROP_ZOOM_EXPAND:
+ pr->zoom_expand = g_value_get_boolean(value);
+ break;
+ case PROP_DITHER_QUALITY:
+ pr->dither_quality = g_value_get_uint(value);
+ break;
+ case PROP_SCROLL_RESET:
+ pr->scroll_reset = g_value_get_uint(value);
+ break;
+ case PROP_DELAY_FLIP:
+ pr->delay_flip = g_value_get_boolean(value);
+ break;
+ case PROP_LOADING:
+ pr->loading = g_value_get_boolean(value);
+ break;
+ case PROP_CACHE_SIZE_DISPLAY:
+ pr->tile_cache_max = g_value_get_uint(value);
+ break;
+ case PROP_CACHE_SIZE_TILES:
+ pr->source_tiles_cache_size = g_value_get_uint(value);
+ break;
+ case PROP_WINDOW_FIT:
+ pr->window_fit = g_value_get_boolean(value);
+ break;
+ case PROP_WINDOW_LIMIT:
+ pr->window_limit = g_value_get_boolean(value);
+ break;
+ case PROP_WINDOW_LIMIT_VALUE:
+ pr->window_limit_size = g_value_get_uint(value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
+ break;
+ }
+}
+
+static void pixbuf_renderer_get_property(GObject *object, guint prop_id,
+ GValue *value, GParamSpec *pspec)
+{
+ PixbufRenderer *pr;
+
+ pr = PIXBUF_RENDERER(object);
+
+ switch (prop_id)
+ {
+ case PROP_ZOOM_MIN:
+ g_value_set_double(value, pr->zoom_min);
+ break;
+ case PROP_ZOOM_MAX:
+ g_value_set_double(value, pr->zoom_max);
+ break;
+ case PROP_ZOOM_QUALITY:
+ g_value_set_uint(value, pr->zoom_quality);
+ break;
+ case PROP_ZOOM_2PASS:
+ g_value_set_boolean(value, pr->zoom_2pass);
+ break;
+ case PROP_ZOOM_EXPAND:
+ g_value_set_boolean(value, pr->zoom_expand);
+ break;
+ case PROP_DITHER_QUALITY:
+ g_value_set_uint(value, pr->dither_quality);
+ break;
+ case PROP_SCROLL_RESET:
+ g_value_set_uint(value, pr->scroll_reset);
+ break;
+ case PROP_DELAY_FLIP:
+ g_value_set_boolean(value, pr->delay_flip);
+ break;
+ case PROP_LOADING:
+ g_value_set_boolean(value, pr->loading);
+ break;
+ case PROP_CACHE_SIZE_DISPLAY:
+ g_value_set_uint(value, pr->tile_cache_max);
+ break;
+ case PROP_CACHE_SIZE_TILES:
+ g_value_set_uint(value, pr->source_tiles_cache_size);
+ break;
+ case PROP_WINDOW_FIT:
+ g_value_set_boolean(value, pr->window_fit);
+ break;
+ case PROP_WINDOW_LIMIT:
+ g_value_set_boolean(value, pr->window_limit);
+ break;
+ case PROP_WINDOW_LIMIT_VALUE:
+ g_value_set_uint(value, pr->window_limit_size);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
+ break;
+ }
+}
+
+static gint pixbuf_renderer_expose(GtkWidget *widget, GdkEventExpose *event)
+{
+ if (GTK_WIDGET_DRAWABLE(widget))
+ {
+ if (!GTK_WIDGET_NO_WINDOW(widget))
+ {
+ pixbuf_renderer_paint(PIXBUF_RENDERER(widget), &event->area);
+ }
+ }
+
+ return FALSE;
+}
+
+/*
+ *-------------------------------------------------------------------
+ * misc utilities
+ *-------------------------------------------------------------------
+ */
+
+static void widget_set_cursor(GtkWidget *widget, gint icon)
+{
+ GdkCursor *cursor;
+
+ if (!widget->window) return;
+
+ if (icon == -1)
+ {
+ cursor = NULL;
+ }
+ else
+ {
+ cursor = gdk_cursor_new (icon);
+ }
+
+ gdk_window_set_cursor(widget->window, cursor);
+
+ if (cursor) gdk_cursor_unref(cursor);
+}
+
+static gint pixmap_calc_size(GdkPixmap *pixmap)
+{
+ gint w, h, d;
+
+ d = gdk_drawable_get_depth(pixmap);
+ gdk_drawable_get_size(pixmap, &w, &h);
+ return w * h * (d / 8);
+}
+
+static gint util_clip_region(gint x, gint y, gint w, gint h,
+ gint clip_x, gint clip_y, gint clip_w, gint clip_h,
+ gint *rx, gint *ry, gint *rw, gint *rh)
+{
+ if (clip_x + clip_w <= x ||
+ clip_x >= x + w ||
+ clip_y + clip_h <= y ||
+ clip_y >= y + h)
+ {
+ return FALSE;
+ }
+
+ *rx = MAX(x, clip_x);
+ *rw = MIN((x + w), (clip_x + clip_w)) - *rx;
+
+ *ry = MAX(y, clip_y);
+ *rh = MIN((y + h), (clip_y + clip_h)) - *ry;
+
+ return TRUE;
+}
+
+static gint pr_parent_window_sizable(PixbufRenderer *pr)
+{
+ if (!pr->parent_window) return FALSE;
+ if (!pr->window_fit) return FALSE;
+ if (!GTK_WIDGET(pr)->window) return FALSE;
+#if 0
+ if (window_maximized(pr->top_window)) return FALSE;
+#endif
+
+ return TRUE;
+}
+
+static gint pr_parent_window_resize(PixbufRenderer *pr, gint w, gint h)
+{
+ GtkWidget *widget;
+ GtkWidget *parent;
+ gint ww, wh;
+
+ if (!pr_parent_window_sizable(pr)) return FALSE;
+
+ if (pr->window_limit)
+ {
+ gint sw = gdk_screen_width() * pr->window_limit_size / 100;
+ gint sh = gdk_screen_height() * pr->window_limit_size / 100;
+
+ if (w > sw) w = sw;
+ if (h > sh) h = sh;
+ }
+
+ widget = GTK_WIDGET(pr);
+ parent = GTK_WIDGET(pr->parent_window);
+
+ w += (parent->allocation.width - widget->allocation.width);
+ h += (parent->allocation.height - widget->allocation.height);
+
+ gdk_drawable_get_size(parent->window, &ww, &wh);
+ if (w == ww && h == wh) return FALSE;
+
+ gdk_window_resize(parent->window, w, h);
+
+ return TRUE;
+}
+
+void pixbuf_renderer_set_parent(PixbufRenderer *pr, GtkWindow *window)
+{
+ g_return_if_fail(IS_PIXBUF_RENDERER(pr));
+ g_return_if_fail(window == NULL || GTK_IS_WINDOW(window));
+
+ pr->parent_window = GTK_WIDGET(window);
+}
+
+GtkWindow *pixbuf_renderer_get_parent(PixbufRenderer *pr)
+{
+ g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), NULL);
+
+ return GTK_WINDOW(pr->parent_window);
+}
+
+
+/*
+ *-------------------------------------------------------------------
+ * overlays
+ *-------------------------------------------------------------------
+ */
+
+static void pr_overlay_draw(PixbufRenderer *pr, gint x, gint y, gint w, gint h)
+{
+ GtkWidget *box;
+ GList *work;
+
+ box = GTK_WIDGET(pr);
+
+ work = pr->overlay_list;
+ while (work)
+ {
+ OverlayData *od;
+ gint px, py, pw, ph;
+ gint rx, ry, rw, rh;
+
+ od = work->data;
+ work = work->next;
+
+ if (!od->visible) continue;
+
+ pw = gdk_pixbuf_get_width(od->pixbuf);
+ ph = gdk_pixbuf_get_height(od->pixbuf);
+ px = od->x;
+ py = od->y;
+
+ if (od->relative)
+ {
+ if (px < 0) px = pr->window_width - pw + px;
+ if (py < 0) py = pr->window_height - ph + py;
+ }
+
+ if (util_clip_region(x, y, w, h, px, py, pw, ph, &rx, &ry, &rw, &rh))
+ {
+ gdk_draw_pixbuf(box->window,
+ box->style->fg_gc[GTK_WIDGET_STATE(box)],
+ od->pixbuf,
+ rx - px, ry - py,
+ rx, ry, rw, rh,
+ pr->dither_quality, rx, ry);
+ }
+ }
+}
+
+static void pr_overlay_queue_draw(PixbufRenderer *pr, OverlayData *od, gint hidden)
+{
+ gint x, y, w, h;
+ gint old_vis;
+
+ w = gdk_pixbuf_get_width(od->pixbuf);
+ h = gdk_pixbuf_get_height(od->pixbuf);
+ x = od->x;
+ y = od->y;
+
+ if (od->relative)
+ {
+ if (x < 0) x = pr->window_width - w + x;
+ if (y < 0) y = pr->window_height - h + y;
+ }
+
+ pr_queue(pr, pr->x_scroll - pr->x_offset + x,
+ pr->y_scroll - pr->y_offset + y,
+ w, h,
+ FALSE, TILE_RENDER_ALL, FALSE);
+
+ old_vis = od->visible;
+ if (hidden) od->visible = FALSE;
+ pr_border_draw(pr, x, y, w, h);
+ od->visible = old_vis;
+}
+
+static void pr_overlay_queue_all(PixbufRenderer *pr)
+{
+ GList *work;
+
+ work = pr->overlay_list;
+ while (work)
+ {
+ OverlayData *od = work->data;
+ work = work->next;
+
+ pr_overlay_queue_draw(pr, od, FALSE);
+ }
+}
+
+static OverlayData *pr_overlay_find(PixbufRenderer *pr, gint id)
+{
+ GList *work;
+
+ work = pr->overlay_list;
+ while (work)
+ {
+ OverlayData *od = work->data;
+ work = work->next;
+
+ if (od->id == id) return od;
+ }
+
+ return NULL;
+}
+
+gint pixbuf_renderer_overlay_add(PixbufRenderer *pr, GdkPixbuf *pixbuf, gint x, gint y,
+ gint relative, gint always)
+{
+ OverlayData *od;
+ gint id;
+
+ g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), -1);
+ g_return_val_if_fail(pixbuf != NULL, -1);
+
+ id = 1;
+ while (pr_overlay_find(pr, id)) id++;
+
+ od = g_new0(OverlayData, 1);
+ od->id = id;
+ od->pixbuf = pixbuf;
+ g_object_ref(G_OBJECT(od->pixbuf));
+ od->x = x;
+ od->y = y;
+ od->relative = relative;
+ od->visible = TRUE;
+ od->always = always;
+
+ pr->overlay_list = g_list_append(pr->overlay_list, od);
+
+ pr_overlay_queue_draw(pr, od, FALSE);
+
+ return od->id;
+}
+
+static void pr_overlay_free(PixbufRenderer *pr, OverlayData *od)
+{
+ pr->overlay_list = g_list_remove(pr->overlay_list, od);
+
+ if (od->pixbuf) g_object_unref(G_OBJECT(od->pixbuf));
+ g_free(od);
+}
+
+static void pr_overlay_list_clear(PixbufRenderer *pr)
+{
+ while (pr->overlay_list)
+ {
+ OverlayData *od;
+
+ od = pr->overlay_list->data;
+ pr_overlay_free(pr, od);
+ }
+}
+
+void pixbuf_renderer_overlay_set(PixbufRenderer *pr, gint id, GdkPixbuf *pixbuf, gint x, gint y)
+{
+ OverlayData *od;
+
+ g_return_if_fail(IS_PIXBUF_RENDERER(pr));
+
+ od = pr_overlay_find(pr, id);
+ if (!od) return;
+
+ if (pixbuf)
+ {
+ pr_overlay_queue_draw(pr, od, TRUE);
+
+ g_object_ref(G_OBJECT(pixbuf));
+ g_object_unref(G_OBJECT(od->pixbuf));
+ od->pixbuf = pixbuf;
+
+ od->x = x;
+ od->y = y;
+
+ pr_overlay_queue_draw(pr, od, FALSE);
+ }
+ else
+ {
+ pr_overlay_queue_draw(pr, od, TRUE);
+ pr_overlay_free(pr, od);
+ }
+}
+
+gint pixbuf_renderer_overlay_get(PixbufRenderer *pr, gint id, GdkPixbuf **pixbuf, gint *x, gint *y)
+{
+ OverlayData *od;
+
+ g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
+
+ od = pr_overlay_find(pr, id);
+ if (!od) return FALSE;
+
+ if (pixbuf) *pixbuf = od->pixbuf;
+ if (x) *x = od->x;
+ if (y) *y = od->y;
+
+ return TRUE;
+}
+
+void pixbuf_renderer_overlay_remove(PixbufRenderer *pr, gint id)
+{
+ pixbuf_renderer_overlay_set(pr, id, NULL, 0, 0);
+}
+
+/*
+ *-------------------------------------------------------------------
+ * scroller overlay
+ *-------------------------------------------------------------------
+ */
+
+
+static gboolean pr_scroller_update_cb(gpointer data)
+{
+ PixbufRenderer *pr = data;
+ gint x, y;
+ gint xinc, yinc;
+
+ /* this was a simple scroll by difference between scroller and mouse position,
+ * but all this math results in a smoother result and accounts for a dead zone.
+ */
+
+ if (abs(pr->scroller_xpos - pr->scroller_x) < PR_SCROLLER_DEAD_ZONE)
+ {
+ x = 0;
+ }
+ else
+ {
+ gint shift = PR_SCROLLER_DEAD_ZONE / 2 * PR_SCROLLER_UPDATES_PER_SEC;
+ x = (pr->scroller_xpos - pr->scroller_x) / 2 * PR_SCROLLER_UPDATES_PER_SEC;
+ x += (x > 0) ? -shift : shift;
+ }
+
+ if (abs(pr->scroller_ypos - pr->scroller_y) < PR_SCROLLER_DEAD_ZONE)
+ {
+ y = 0;
+ }
+ else
+ {
+ gint shift = PR_SCROLLER_DEAD_ZONE / 2 * PR_SCROLLER_UPDATES_PER_SEC;
+ y = (pr->scroller_ypos - pr->scroller_y) / 2 * PR_SCROLLER_UPDATES_PER_SEC;
+ y += (y > 0) ? -shift : shift;
+ }
+
+ if (abs(x) < PR_SCROLLER_DEAD_ZONE * PR_SCROLLER_UPDATES_PER_SEC)
+ {
+ xinc = x;
+ }
+ else
+ {
+ xinc = pr->scroller_xinc;
+
+ if (x >= 0)
+ {
+ if (xinc < 0) xinc = 0;
+ if (x < xinc) xinc = x;
+ if (x > xinc) xinc = MIN(xinc + x / PR_SCROLLER_UPDATES_PER_SEC, x);
+ }
+ else
+ {
+ if (xinc > 0) xinc = 0;
+ if (x > xinc) xinc = x;
+ if (x < xinc) xinc = MAX(xinc + x / PR_SCROLLER_UPDATES_PER_SEC, x);
+ }
+ }
+
+ if (abs(y) < PR_SCROLLER_DEAD_ZONE * PR_SCROLLER_UPDATES_PER_SEC)
+ {
+ yinc = y;
+ }
+ else
+ {
+ yinc = pr->scroller_yinc;
+
+ if (y >= 0)
+ {
+ if (yinc < 0) yinc = 0;
+ if (y < yinc) yinc = y;
+ if (y > yinc) yinc = MIN(yinc + y / PR_SCROLLER_UPDATES_PER_SEC, y);
+ }
+ else
+ {
+ if (yinc > 0) yinc = 0;
+ if (y > yinc) yinc = y;
+ if (y < yinc) yinc = MAX(yinc + y / PR_SCROLLER_UPDATES_PER_SEC, y);
+ }
+ }
+
+ pr->scroller_xinc = xinc;
+ pr->scroller_yinc = yinc;
+
+ xinc = xinc / PR_SCROLLER_UPDATES_PER_SEC;
+ yinc = yinc / PR_SCROLLER_UPDATES_PER_SEC;
+
+ pixbuf_renderer_scroll(pr, xinc, yinc);
+
+ return TRUE;
+}
+
+static void pr_scroller_timer_set(PixbufRenderer *pr, gint start)
+{
+ if (pr->scroller_id != -1)
+ {
+ g_source_remove(pr->scroller_id);
+ pr->scroller_id = -1;
+ }
+
+ if (start)
+ {
+ pr->scroller_id = g_timeout_add(1000 / PR_SCROLLER_UPDATES_PER_SEC,
+ pr_scroller_update_cb, pr);
+ }
+}
+
+static void pr_scroller_start(PixbufRenderer *pr, gint x, gint y)
+{
+ if (pr->scroller_overlay == -1)
+ {
+ GdkPixbuf *pixbuf;
+ gint w, h;
+
+#ifdef GQVIEW_BUILD
+ pixbuf = pixbuf_inline(PIXBUF_INLINE_SCROLLER);
+#else
+ pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, 32, 32);
+ gdk_pixbuf_fill(pixbuf, 0x000000ff);
+#endif
+ w = gdk_pixbuf_get_width(pixbuf);
+ h = gdk_pixbuf_get_height(pixbuf);
+
+ pr->scroller_overlay = pixbuf_renderer_overlay_add(pr, pixbuf, x - w / 2, y - h / 2, FALSE, TRUE);
+ g_object_unref(pixbuf);
+ }
+
+ pr->scroller_x = x;
+ pr->scroller_y = y;
+ pr->scroller_xpos = x;
+ pr->scroller_ypos = y;
+
+ pr_scroller_timer_set(pr, TRUE);
+}
+
+static void pr_scroller_stop(PixbufRenderer *pr)
+{
+ if (pr->scroller_id == -1) return;
+
+ pixbuf_renderer_overlay_remove(pr, pr->scroller_overlay);
+ pr->scroller_overlay = -1;
+
+ pr_scroller_timer_set(pr, FALSE);
+}
+
+/*
+ *-------------------------------------------------------------------
+ * borders
+ *-------------------------------------------------------------------
+ */
+
+static void pr_border_draw(PixbufRenderer *pr, gint x, gint y, gint w, gint h)
+{
+ GtkWidget *box;
+ gint rx, ry, rw, rh;
+
+ box = GTK_WIDGET(pr);
+
+ if (!box->window) return;
+
+ if (!pr->pixbuf && !pr->source_tiles_enabled)
+ {
+ if (util_clip_region(x, y, w, h,
+ 0, 0,
+ pr->window_width, pr->window_height,
+ &rx, &ry, &rw, &rh))
+ {
+ gdk_window_clear_area(box->window, rx, ry, rw, rh);
+ pr_overlay_draw(pr, rx, ry, rw, rh);
+ }
+ return;
+ }
+
+ if (pr->vis_width < pr->window_width)
+ {
+ if (pr->x_offset > 0 &&
+ util_clip_region(x, y, w, h,
+ 0, 0,
+ pr->x_offset, pr->window_height,
+ &rx, &ry, &rw, &rh))
+ {
+ gdk_window_clear_area(box->window, rx, ry, rw, rh);
+ pr_overlay_draw(pr, rx, ry, rw, rh);
+ }
+ if (pr->window_width - pr->vis_width - pr->x_offset > 0 &&
+ util_clip_region(x, y, w, h,
+ pr->x_offset + pr->vis_width, 0,
+ pr->window_width - pr->vis_width - pr->x_offset, pr->window_height,
+ &rx, &ry, &rw, &rh))
+ {
+ gdk_window_clear_area(box->window, rx, ry, rw, rh);
+ pr_overlay_draw(pr, rx, ry, rw, rh);
+ }
+ }
+ if (pr->vis_height < pr->window_height)
+ {
+ if (pr->y_offset > 0 &&
+ util_clip_region(x, y, w, h,
+ pr->x_offset, 0,
+ pr->vis_width, pr->y_offset,
+ &rx, &ry, &rw, &rh))
+ {
+ gdk_window_clear_area(box->window, rx, ry, rw, rh);
+ pr_overlay_draw(pr, rx, ry, rw, rh);
+ }
+ if (pr->window_height - pr->vis_height - pr->y_offset > 0 &&
+ util_clip_region(x, y, w, h,
+ pr->x_offset, pr->y_offset + pr->vis_height,
+ pr->vis_width, pr->window_height - pr->vis_height - pr->y_offset,
+ &rx, &ry, &rw, &rh))
+ {
+ gdk_window_clear_area(box->window, rx, ry, rw, rh);
+ pr_overlay_draw(pr, rx, ry, rw, rh);
+ }
+ }
+}
+
+static void pr_border_clear(PixbufRenderer *pr)
+{
+ pr_border_draw(pr, 0, 0, pr->window_width, pr->window_height);
+}
+
+void pixbuf_renderer_set_color(PixbufRenderer *pr, GdkColor *color)
+{
+ GtkStyle *style;
+ GtkWidget *widget;
+
+ g_return_if_fail(IS_PIXBUF_RENDERER(pr));
+
+ widget = GTK_WIDGET(pr);
+
+ style = gtk_style_copy(gtk_widget_get_style(widget));
+ g_object_ref(G_OBJECT(style));
+
+ if (color)
+ {
+ GdkColor *slot;
+
+ slot = &style->bg[GTK_STATE_NORMAL];
+
+ slot->red = color->red;
+ slot->green = color->green;
+ slot->blue = color->blue;
+ }
+
+ gtk_widget_set_style(widget, style);
+ g_object_unref(G_OBJECT(style));
+
+ if (GTK_WIDGET_VISIBLE(widget)) pr_border_clear(pr);
+}
+
+void pixbuf_renderer_set_black(PixbufRenderer *pr, gint black)
+{
+ GdkColor color = { 0, 0, 0, 0};
+
+ pixbuf_renderer_set_color(pr, &color);
+}
+
+
+/*
+ *-------------------------------------------------------------------
+ * source tiles
+ *-------------------------------------------------------------------
+ */
+
+static void pr_source_tile_free(SourceTile *st)
+{
+ if (!st) return;
+
+ if (st->pixbuf) g_object_unref(st->pixbuf);
+ g_free(st);
+}
+
+static void pr_source_tile_free_all(PixbufRenderer *pr)
+{
+ GList *work;
+
+ work = pr->source_tiles;
+ while (work)
+ {
+ SourceTile *st;
+
+ st = work->data;
+ work = work->next;
+
+ pr_source_tile_free(st);
+ }
+
+ g_list_free(pr->source_tiles);
+ pr->source_tiles = NULL;
+}
+
+static void pr_source_tile_unset(PixbufRenderer *pr)
+{
+ pr_source_tile_free_all(pr);
+ pr->source_tiles_enabled = FALSE;
+}
+
+static gint pr_source_tile_visible(PixbufRenderer *pr, SourceTile *st)
+{
+ gint x1, y1, x2, y2;
+
+ if (!st) return FALSE;
+
+ x1 = (pr->x_scroll / PR_TILE_SIZE) * PR_TILE_SIZE;
+ y1 = (pr->y_scroll / PR_TILE_SIZE) * PR_TILE_SIZE;
+ x2 = ((pr->x_scroll + pr->vis_width) / PR_TILE_SIZE) * PR_TILE_SIZE + PR_TILE_SIZE;
+ y2 = ((pr->y_scroll + pr->vis_height) / PR_TILE_SIZE) * PR_TILE_SIZE + PR_TILE_SIZE;
+
+ return !((double)st->x * pr->scale > (double)x2 ||
+ (double)(st->x + pr->source_tile_width) * pr->scale < (double)x1 ||
+ (double)st->y * pr->scale > (double)x2 ||
+ (double)(st->y + pr->source_tile_height) * pr->scale < (double)y1);
+}
+
+static SourceTile *pr_source_tile_new(PixbufRenderer *pr, gint x, gint y)
+{
+ SourceTile *st = NULL;
+ gint count;
+
+ g_return_val_if_fail(pr->source_tile_width >= 1 && pr->source_tile_height >= 1, NULL);
+
+ if (pr->source_tiles_cache_size < 4) pr->source_tiles_cache_size = 4;
+
+ count = g_list_length(pr->source_tiles);
+ if (count >= pr->source_tiles_cache_size)
+ {
+ GList *work;
+
+ work = g_list_last(pr->source_tiles);
+ while (work && count >= pr->source_tiles_cache_size)
+ {
+ SourceTile *needle;
+
+ needle = work->data;
+ work = work->prev;
+
+ if (!pr_source_tile_visible(pr, needle))
+ {
+ pr->source_tiles = g_list_remove(pr->source_tiles, needle);
+
+ if (pr->func_tile_dispose)
+ {
+ pr->func_tile_dispose(pr, needle->x, needle->y,
+ pr->source_tile_width, pr->source_tile_height,
+ needle->pixbuf, pr->func_tile_data);
+ }
+
+ if (!st)
+ {
+ st = needle;
+ }
+ else
+ {
+ pr_source_tile_free(needle);
+ }
+
+ count--;
+ }
+ }
+ }
+
+ if (!st)
+ {
+ st = g_new0(SourceTile, 1);
+ st->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8,
+ pr->source_tile_width, pr->source_tile_height);
+ }
+
+ st->x = (x / pr->source_tile_width) * pr->source_tile_width;
+ st->y = (y / pr->source_tile_height) * pr->source_tile_height;
+ st->blank = TRUE;
+
+ pr->source_tiles = g_list_prepend(pr->source_tiles, st);
+
+ return st;
+}
+
+static SourceTile *pr_source_tile_request(PixbufRenderer *pr, gint x, gint y)
+{
+ SourceTile *st;
+
+ st = pr_source_tile_new(pr, x, y);
+ if (!st) return NULL;
+
+ if (pr->func_tile_request &&
+ pr->func_tile_request(pr, st->x, st->y,
+ pr->source_tile_width, pr->source_tile_height, st->pixbuf, pr->func_tile_data))
+ {
+ st->blank = FALSE;
+ }
+
+ pr_tile_invalidate_region(pr, st->x * pr->scale, st->y * pr->scale,
+ pr->source_tile_width * pr->scale, pr->source_tile_height * pr->scale);
+
+ return st;
+}
+
+static SourceTile *pr_source_tile_find(PixbufRenderer *pr, gint x, gint y)
+{
+ GList *work;
+
+ work = pr->source_tiles;
+ while (work)
+ {
+ SourceTile *st = work->data;
+
+ if (x >= st->x && x < st->x + pr->source_tile_width &&
+ y >= st->y && y < st->y + pr->source_tile_height)
+ {
+ if (work != pr->source_tiles)
+ {
+ pr->source_tiles = g_list_remove_link(pr->source_tiles, work);
+ pr->source_tiles = g_list_concat(work, pr->source_tiles);
+ }
+ return st;
+ }
+
+ work = work->next;
+ }
+
+ return NULL;
+}
+
+static GList *pr_source_tile_compute_region(PixbufRenderer *pr, gint x, gint y, gint w, gint h, gint request)
+{
+ gint x1, y1;
+ GList *list = NULL;
+ gint sx, sy;
+
+ if (x < 0) x = 0;
+ if (y < 0) y = 0;
+ if (w > pr->image_width) w = pr->image_width;
+ if (h > pr->image_height) h = pr->image_height;
+
+ sx = (x / pr->source_tile_width) * pr->source_tile_width;
+ sy = (y / pr->source_tile_height) * pr->source_tile_height;
+
+ for (x1 = sx; x1 < x + w; x1+= pr->source_tile_width)
+ {
+ for (y1 = sy; y1 < y + h; y1 += pr->source_tile_height)
+ {
+ SourceTile *st;
+
+ st = pr_source_tile_find(pr, x1, y1);
+ if (!st && request) st = pr_source_tile_request(pr, x1, y1);
+
+ if (st) list = g_list_prepend(list, st);
+ }
+ }
+
+ return g_list_reverse(list);
+}
+
+static void pr_source_tile_changed(PixbufRenderer *pr, gint x, gint y, gint width, gint height)
+{
+ GList *work;
+
+ work = pr->source_tiles;
+ while (work)
+ {
+ SourceTile *st;
+ gint rx, ry, rw, rh;
+
+ st = work->data;
+ work = work->next;
+
+ if (util_clip_region(st->x, st->y, pr->source_tile_width, pr->source_tile_height,
+ x, y, width, height,
+ &rx, &ry, &rw, &rh))
+ {
+ GdkPixbuf *pixbuf;
+
+ pixbuf = gdk_pixbuf_new_subpixbuf(st->pixbuf, rx - st->x, ry - st->y, rw, rh);
+ if (pr->func_tile_request &&
+ pr->func_tile_request(pr, rx, ry, rw, rh, pixbuf, pr->func_tile_data))
+ {
+ pr_tile_invalidate_region(pr, rx * pr->scale, ry * pr->scale,
+ rw * pr->scale, rh * pr->scale);
+ }
+ g_object_unref(pixbuf);
+ }
+ }
+}
+
+static gint pr_source_tile_render(PixbufRenderer *pr, ImageTile *it,
+ gint x, gint y, gint w, gint h,
+ gint new_data, gint fast)
+{
+ GtkWidget *box;
+ GList *list;
+ GList *work;
+ gint draw = FALSE;
+
+ box = GTK_WIDGET(pr);
+
+ if (pr->zoom == 1.0 || pr->scale == 1.0)
+ {
+ list = pr_source_tile_compute_region(pr, it->x + x, it->y + y, w, h, TRUE);
+ work = list;
+ while (work)
+ {
+ SourceTile *st;
+ gint rx, ry, rw, rh;
+
+ st = work->data;
+ work = work->next;
+
+ if (util_clip_region(st->x, st->y, pr->source_tile_width, pr->source_tile_height,
+ it->x + x, it->y + y, w, h,
+ &rx, &ry, &rw, &rh))
+ {
+ if (st->blank)
+ {
+ gdk_draw_rectangle(it->pixmap, box->style->black_gc, TRUE,
+ rx - st->x, ry - st->y, rw, rh);
+ }
+ else /* (pr->zoom == 1.0 || pr->scale == 1.0) */
+ {
+ gdk_draw_pixbuf(it->pixmap,
+ box->style->fg_gc[GTK_WIDGET_STATE(box)],
+ st->pixbuf,
+ rx - st->x, ry - st->y,
+ rx - it->x, ry - it->y,
+ rw, rh,
+ pr->dither_quality, rx, ry);
+ }
+ }
+ }
+ }
+ else
+ {
+ double scale_x, scale_y;
+ gint sx, sy, sw, sh;
+
+ if (pr->image_width == 0 || pr->image_height == 0) return FALSE;
+ scale_x = (double)pr->width / pr->image_width;
+ scale_y = (double)pr->height / pr->image_height;
+
+ sx = (double)(it->x + x) / scale_x;
+ sy = (double)(it->y + y) / scale_y;
+ sw = (double)w / scale_x;
+ sh = (double)h / scale_y;
+
+ if (pr->width < PR_MIN_SCALE_SIZE || pr->height < PR_MIN_SCALE_SIZE) fast = TRUE;
+
+#if 0
+ /* draws red over draw region, to check for leaks (regions not filled) */
+ pixbuf_set_rect_fill(it->pixbuf, x, y, w, h, 255, 0, 0, 255);
+#endif
+
+ list = pr_source_tile_compute_region(pr, sx, sy, sw, sh, TRUE);
+ work = list;
+ while (work)
+ {
+ SourceTile *st;
+ gint rx, ry, rw, rh;
+ gint stx, sty, stw, sth;
+
+ st = work->data;
+ work = work->next;
+
+ stx = floor((double)st->x * scale_x);
+ sty = floor((double)st->y * scale_y);
+ stw = ceil ((double)(st->x + pr->source_tile_width) * scale_x) - stx;
+ sth = ceil ((double)(st->y + pr->source_tile_height) * scale_y) - sty;
+
+ if (util_clip_region(stx, sty, stw, sth,
+ it->x + x, it->y + y, w, h,
+ &rx, &ry, &rw, &rh))
+ {
+ if (st->blank)
+ {
+ gdk_draw_rectangle(it->pixmap, box->style->black_gc, TRUE,
+ rx - st->x, ry - st->y, rw, rh);
+ }
+ else
+ {
+ double offset_x;
+ double offset_y;
+
+ /* may need to use unfloored stx,sty values here */
+ offset_x = (double)(stx - it->x);
+ offset_y = (double)(sty - it->y);
+
+ gdk_pixbuf_scale(st->pixbuf, it->pixbuf, rx - it->x, ry - it->y, rw, rh,
+ (double) 0.0 + offset_x,
+ (double) 0.0 + offset_y,
+ scale_x, scale_y,
+ (fast) ? GDK_INTERP_NEAREST : pr->zoom_quality);
+ draw = TRUE;
+ }
+ }
+ }
+ }
+
+ g_list_free(list);
+
+ return draw;
+}
+
+void pixbuf_renderer_set_tiles(PixbufRenderer *pr, gint width, gint height,
+ gint tile_width, gint tile_height, gint cache_size,
+ PixbufRendererTileRequestFunc func_request,
+ PixbufRendererTileDisposeFunc func_dispose,
+ gpointer user_data,
+ gdouble zoom)
+{
+ g_return_if_fail(IS_PIXBUF_RENDERER(pr));
+ g_return_if_fail(tile_width >= 32 && tile_width >= 32);
+ g_return_if_fail(width >= 32 && height > 32);
+ g_return_if_fail(func_request != NULL);
+
+ if (pr->pixbuf) g_object_unref(pr->pixbuf);
+ pr->pixbuf = NULL;
+
+ pr_source_tile_unset(pr);
+
+ if (cache_size < 4) cache_size = 4;
+
+ pr->source_tiles_enabled = TRUE;
+ pr->source_tiles_cache_size = cache_size;
+ pr->source_tile_width = tile_width;
+ pr->source_tile_height = tile_height;
+
+ pr->image_width = width;
+ pr->image_height = height;
+
+ pr->func_tile_request = func_request;
+ pr->func_tile_dispose = func_dispose;
+ pr->func_tile_data = user_data;
+
+ pr_zoom_sync(pr, zoom, TRUE, FALSE, TRUE, FALSE, 0, 0);
+ pr_redraw(pr, TRUE);
+}
+
+gint pixbuf_renderer_get_tiles(PixbufRenderer *pr)
+{
+ g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
+
+ return pr->source_tiles_enabled;
+}
+
+static void pr_zoom_adjust_real(PixbufRenderer *pr, gdouble increment,
+ gint center_point, gint x, gint y)
+{
+ gdouble zoom = pr->zoom;
+
+ if (increment == 0.0) return;
+
+ if (zoom == 0.0)
+ {
+ if (pr->scale < 1.0)
+ {
+ zoom = 0.0 - 1.0 / pr->scale;
+ }
+ else
+ {
+ zoom = pr->scale;
+ }
+ }
+
+ if (increment < 0.0)
+ {
+ if (zoom >= 1.0 && zoom + increment < 1.0)
+ {
+ zoom = zoom + increment - 2.0;
+ }
+ else
+ {
+ zoom = zoom + increment;
+ }
+ }
+ else
+ {
+ if (zoom <= -1.0 && zoom + increment > -1.0)
+ {
+ zoom = zoom + increment + 2.0;
+ }
+ else
+ {
+ zoom = zoom + increment;
+ }
+ }
+
+ pr_zoom_sync(pr, zoom, FALSE, FALSE, FALSE, center_point, x, y);
+}
+
+/*
+ *-------------------------------------------------------------------
+ * display tiles
+ *-------------------------------------------------------------------
+ */
+
+static ImageTile *pr_tile_new(gint x, gint y, gint width, gint height)
+{
+ ImageTile *it;
+
+ it = g_new0(ImageTile, 1);
+
+ it->x = x;
+ it->y = y;
+ it->w = width;
+ it->h = height;
+
+ it->render_done = TILE_RENDER_NONE;
+
+ return it;
+}
+
+static void pr_tile_free(ImageTile *it)
+{
+ if (!it) return;
+
+ if (it->pixbuf) gdk_pixbuf_unref(it->pixbuf);
+ if (it->pixmap) g_object_unref(it->pixmap);
+
+ g_free(it);
+}
+
+static void pr_tile_free_all(PixbufRenderer *pr)
+{
+ GList *work;
+
+ work = pr->tiles;
+ while (work)
+ {
+ ImageTile *it;
+
+ it = work->data;
+ work = work->next;
+
+ pr_tile_free(it);
+ }
+
+ g_list_free(pr->tiles);
+ pr->tiles = NULL;
+ pr->tile_cache_size = 0;
+}
+
+static ImageTile *pr_tile_add(PixbufRenderer *pr, gint x, gint y)
+{
+ ImageTile *it;
+
+ it = pr_tile_new(x, y, pr->tile_width, pr->tile_height);
+
+ if (it->x + it->w > pr->width) it->w = pr->width - it->x;
+ if (it->y + it->h > pr->height) it->h = pr->height - it->y;
+
+ pr->tiles = g_list_prepend(pr->tiles, it);
+ pr->tile_cache_size += it->size;
+
+ return it;
+}
+
+static void pr_tile_remove(PixbufRenderer *pr, ImageTile *it)
+{
+ if (it->qd)
+ {
+ QueueData *qd = it->qd;
+
+ it->qd = NULL;
+ pr->draw_queue = g_list_remove(pr->draw_queue, qd);
+ g_free(qd);
+ }
+
+ if (it->qd2)
+ {
+ QueueData *qd = it->qd2;
+
+ it->qd2 = NULL;
+ pr->draw_queue_2pass = g_list_remove(pr->draw_queue_2pass, qd);
+ g_free(qd);
+ }
+
+ pr->tiles = g_list_remove(pr->tiles, it);
+ pr->tile_cache_size -= it->size;
+
+ pr_tile_free(it);
+}
+
+static void pr_tile_free_space(PixbufRenderer *pr, guint space, ImageTile *it)
+{
+ GList *work;
+ gint tile_max;
+
+ work = g_list_last(pr->tiles);
+
+ if (pr->source_tiles_enabled && pr->scale < 1.0)
+ {
+ gint tiles;
+
+ tiles = (pr->vis_width / PR_TILE_SIZE + 1) * (pr->vis_width / PR_TILE_SIZE + 1);
+ tile_max = MAX(tiles * PR_TILE_SIZE * PR_TILE_SIZE * 3,
+ (gint)((double)pr->tile_cache_max * 1048576.0 * pr->scale));
+ }
+ else
+ {
+ tile_max = pr->tile_cache_max * 1048576;
+ }
+
+ while (work && pr->tile_cache_size + space > tile_max)
+ {
+ ImageTile *needle;
+
+ needle = work->data;
+ work = work->prev;
+ if (needle != it &&
+ ((!needle->qd && !needle->qd2) || !pr_tile_is_visible(pr, needle))) pr_tile_remove(pr, needle);
+ }
+}
+
+static void pr_tile_invalidate_all(PixbufRenderer *pr)
+{
+ GList *work;
+
+ work = pr->tiles;
+ while (work)
+ {
+ ImageTile *it;
+
+ it = work->data;
+ work = work->next;
+
+ it->render_done = TILE_RENDER_NONE;
+ it->render_todo = TILE_RENDER_NONE;
+ it->blank = FALSE;
+
+ it->w = MIN(pr->tile_width, pr->width - it->x);
+ it->h = MIN(pr->tile_height, pr->height - it->y);
+ }
+}
+
+static void pr_tile_invalidate_region(PixbufRenderer *pr, gint x, gint y, gint w, gint h)
+{
+ gint x1, x2;
+ gint y1, y2;
+ GList *work;
+
+ x1 = (gint)floor(x / pr->tile_width) * pr->tile_width;
+ x2 = (gint)ceil((x + w) / pr->tile_width) * pr->tile_width;
+
+ y1 = (gint)floor(y / pr->tile_height) * pr->tile_height;
+ y2 = (gint)ceil((y + h) / pr->tile_height) * pr->tile_height;
+
+ work = pr->tiles;
+ while (work)
+ {
+ ImageTile *it;
+
+ it = work->data;
+ work = work->next;
+
+ if (it->x < x2 && it->x + it->w > x1 &&
+ it->y < y2 && it->y + it->h > y1)
+ {
+ it->render_done = TILE_RENDER_NONE;
+ it->render_todo = TILE_RENDER_NONE;
+ }
+ }
+}
+
+static ImageTile *pr_tile_get(PixbufRenderer *pr, gint x, gint y)
+{
+ GList *work;
+
+ work = pr->tiles;
+ while (work)
+ {
+ ImageTile *it;
+
+ it = work->data;
+ if (it->x == x && it->y == y)
+ {
+ pr->tiles = g_list_delete_link(pr->tiles, work);
+ pr->tiles = g_list_prepend(pr->tiles, it);
+ return it;
+ }
+
+ work = work->next;
+ }
+
+ return pr_tile_add(pr, x, y);
+}
+
+static void pr_tile_prepare(PixbufRenderer *pr, ImageTile *it)
+{
+ if (!it->pixmap)
+ {
+ GdkPixmap *pixmap;
+ guint size;
+
+ pixmap = gdk_pixmap_new(((GtkWidget *)pr)->window, pr->tile_width, pr->tile_height, -1);
+
+ size = pixmap_calc_size(pixmap);
+ pr_tile_free_space(pr, size, it);
+
+ it->pixmap = pixmap;
+ it->size += size;
+ pr->tile_cache_size += size;
+ }
+
+ if ((pr->zoom != 1.0 || pr->source_tiles_enabled || (pr->pixbuf && gdk_pixbuf_get_has_alpha(pr->pixbuf)) ) &&
+ !it->pixbuf)
+ {
+ GdkPixbuf *pixbuf;
+ guint size;
+
+ if (pr->pixbuf)
+ {
+ pixbuf = gdk_pixbuf_new(gdk_pixbuf_get_colorspace(pr->pixbuf),
+ gdk_pixbuf_get_has_alpha(pr->pixbuf),
+ gdk_pixbuf_get_bits_per_sample(pr->pixbuf),
+ pr->tile_width, pr->tile_height);
+ }
+ else
+ {
+ pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, pr->tile_width, pr->tile_height);
+ }
+
+ size = gdk_pixbuf_get_rowstride(pixbuf) * pr->tile_height;
+ pr_tile_free_space(pr, size, it);
+
+ it->pixbuf = pixbuf;
+ it->size += size;
+ pr->tile_cache_size += size;
+ }
+}
+
+/*
+ *-------------------------------------------------------------------
+ * drawing
+ *-------------------------------------------------------------------
+ */
+
+static void pr_tile_render(PixbufRenderer *pr, ImageTile *it,
+ gint x, gint y, gint w, gint h,
+ gint new_data, gint fast)
+{
+ GtkWidget *box;
+ gint has_alpha;
+ gint draw = FALSE;
+
+ if (it->render_todo == TILE_RENDER_NONE && it->pixmap && !new_data) return;
+
+ if (it->render_done != TILE_RENDER_ALL)
+ {
+ x = 0;
+ y = 0;
+ w = it->w;
+ h = it->h;
+ if (!fast) it->render_done = TILE_RENDER_ALL;
+ }
+ else if (it->render_todo != TILE_RENDER_AREA)
+ {
+ if (!fast) it->render_todo = TILE_RENDER_NONE;
+ return;
+ }
+
+ if (!fast) it->render_todo = TILE_RENDER_NONE;
+
+ if (new_data) it->blank = FALSE;
+
+ pr_tile_prepare(pr, it);
+ has_alpha = (pr->pixbuf && gdk_pixbuf_get_has_alpha(pr->pixbuf));
+
+ box = GTK_WIDGET(pr);
+
+ /* FIXME checker colors for alpha should be configurable,
+ * also should be drawn for blank = TRUE
+ */
+
+ if (it->blank)
+ {
+ /* no data, do fast rect fill */
+ gdk_draw_rectangle(it->pixmap, box->style->black_gc, TRUE,
+ 0, 0, it->w, it->h);
+ }
+ else if (pr->source_tiles_enabled)
+ {
+ draw = pr_source_tile_render(pr, it, x, y, w, h, new_data, fast);
+ }
+ else if (pr->zoom == 1.0 || pr->scale == 1.0)
+ {
+ if (has_alpha)
+ {
+ gdk_pixbuf_composite_color(pr->pixbuf, it->pixbuf, x, y, w, h,
+ (double) 0.0 - it->x,
+ (double) 0.0 - it->y,
+ 1.0, 1.0, GDK_INTERP_NEAREST,
+ 255, it->x + x, it->y + y,
+ PR_ALPHA_CHECK_SIZE, PR_ALPHA_CHECK1, PR_ALPHA_CHECK2);
+ draw = TRUE;
+ }
+ else
+ {
+ /* faster, simple */
+ gdk_draw_pixbuf(it->pixmap,
+ box->style->fg_gc[GTK_WIDGET_STATE(box)],
+ pr->pixbuf,
+ it->x + x, it->y + y,
+ x, y,
+ w, h,
+ pr->dither_quality, it->x + x, it->y + y);
+ }
+ }
+ else
+ {
+ double scale_x, scale_y;
+
+ if (pr->image_width == 0 || pr->image_height == 0) return;
+ scale_x = (double)pr->width / pr->image_width;
+ scale_y = (double)pr->height / pr->image_height;
+
+ /* HACK: The pixbuf scalers get kinda buggy(crash) with extremely
+ * small sizes for anything but GDK_INTERP_NEAREST
+ */
+ if (pr->width < PR_MIN_SCALE_SIZE || pr->height < PR_MIN_SCALE_SIZE) fast = TRUE;
+
+ if (!has_alpha)
+ {
+ gdk_pixbuf_scale(pr->pixbuf, it->pixbuf, x, y, w, h,
+ (double) 0.0 - it->x,
+ (double) 0.0 - it->y,
+ scale_x, scale_y,
+ (fast) ? GDK_INTERP_NEAREST : pr->zoom_quality);
+ }
+ else
+ {
+ gdk_pixbuf_composite_color(pr->pixbuf, it->pixbuf, x, y, w, h,
+ (double) 0.0 - it->x,
+ (double) 0.0 - it->y,
+ scale_x, scale_y,
+ (fast) ? GDK_INTERP_NEAREST : pr->zoom_quality,
+ 255, it->x + x, it->y + y,
+ PR_ALPHA_CHECK_SIZE, PR_ALPHA_CHECK1, PR_ALPHA_CHECK2);
+ }
+ draw = TRUE;
+ }
+
+ if (draw && it->pixbuf && !it->blank)
+ {
+ gdk_draw_pixbuf(it->pixmap,
+ box->style->fg_gc[GTK_WIDGET_STATE(box)],
+ it->pixbuf,
+ x, y,
+ x, y,
+ w, h,
+ pr->dither_quality, it->x + x, it->y + y);
+ }
+}
+
+
+static void pr_tile_expose(PixbufRenderer *pr, ImageTile *it,
+ gint x, gint y, gint w, gint h,
+ gint new_data, gint fast)
+{
+ GtkWidget *box;
+
+ pr_tile_render(pr, it, x, y, w, h, new_data, fast);
+
+ box = GTK_WIDGET(pr);
+
+ gdk_draw_drawable(box->window, box->style->fg_gc[GTK_WIDGET_STATE(box)],
+ it->pixmap, x, y,
+ pr->x_offset + (it->x - pr->x_scroll) + x, pr->y_offset + (it->y - pr->y_scroll) + y, w, h);
+
+ if (pr->overlay_list)
+ {
+ pr_overlay_draw(pr, pr->x_offset + (it->x - pr->x_scroll) + x,
+ pr->y_offset + (it->y - pr->y_scroll) + y,
+ w, h);
+ }
+}
+
+
+static gint pr_tile_is_visible(PixbufRenderer *pr, ImageTile *it)
+{
+ return (it->x + it->w >= pr->x_scroll && it->x <= pr->x_scroll + pr->window_width - pr->x_offset * 2 &&
+ it->y + it->h >= pr->y_scroll && it->y <= pr->y_scroll + pr->window_height - pr->y_offset * 2);
+}
+
+/*
+ *-------------------------------------------------------------------
+ * draw queue
+ *-------------------------------------------------------------------
+ */
+
+static gint pr_queue_draw_idle_cb(gpointer data)
+{
+ PixbufRenderer *pr = data;
+ QueueData *qd;
+ gint fast;
+
+ if ((!pr->pixbuf && !pr->source_tiles_enabled) ||
+ (!pr->draw_queue && !pr->draw_queue_2pass) ||
+ pr->draw_idle_id == -1)
+ {
+#if 0
+ if (!pr->completed) image_complete_util(pr, FALSE);
+#endif
+
+ pr->draw_idle_id = -1;
+ return FALSE;
+ }
+
+ if (pr->draw_queue)
+ {
+ qd = pr->draw_queue->data;
+ fast = (pr->zoom_2pass && pr->zoom_quality != GDK_INTERP_NEAREST && pr->scale != 1.0);
+ }
+ else
+ {
+ if (pr->loading)
+ {
+ /* still loading, wait till done (also drops the higher priority) */
+
+ pr->draw_idle_id = g_idle_add_full(G_PRIORITY_DEFAULT_IDLE,
+ pr_queue_draw_idle_cb, pr, NULL);
+ pr->draw_idle_high = FALSE;
+ return FALSE;
+ }
+
+ qd = pr->draw_queue_2pass->data;
+ fast = FALSE;
+ }
+
+ if (GTK_WIDGET_REALIZED(pr))
+ {
+ if (pr_tile_is_visible(pr, qd->it))
+ {
+ pr_tile_expose(pr, qd->it, qd->x, qd->y, qd->w, qd->h, qd->new_data, fast);
+ }
+ else if (qd->new_data)
+ {
+ /* if new pixel data, and we already have a pixmap, update the tile */
+ qd->it->blank = FALSE;
+ if (qd->it->pixmap && qd->it->render_done == TILE_RENDER_ALL)
+ {
+ pr_tile_render(pr, qd->it, qd->x, qd->y, qd->w, qd->h, qd->new_data, fast);
+ }
+ }
+ }
+
+ if (pr->draw_queue)
+ {
+ qd->it->qd = NULL;
+ pr->draw_queue = g_list_remove(pr->draw_queue, qd);
+ if (fast)
+ {
+ if (qd->it->qd2)
+ {
+ pr_queue_merge(qd->it->qd2, qd);
+ g_free(qd);
+ }
+ else
+ {
+ qd->it->qd2 = qd;
+ pr->draw_queue_2pass = g_list_append(pr->draw_queue_2pass, qd);
+ }
+ }
+ else
+ {
+ g_free(qd);
+ }
+ }
+ else
+ {
+ qd->it->qd2 = NULL;
+ pr->draw_queue_2pass = g_list_remove(pr->draw_queue_2pass, qd);
+ g_free(qd);
+ }
+
+ if (!pr->draw_queue && !pr->draw_queue_2pass)
+ {
+#if 0
+ if (!pr->completed) image_complete_util(pr, FALSE);
+#endif
+
+ pr->draw_idle_id = -1;
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+static void pr_queue_list_free(GList *list)
+{
+ GList *work;
+
+ work = list;
+ while (work)
+ {
+ QueueData *qd;
+
+ qd = work->data;
+ work = work->next;
+
+ qd->it->qd = NULL;
+ qd->it->qd2 = NULL;
+ g_free(qd);
+ }
+
+ g_list_free(list);
+}
+
+static void pr_queue_clear(PixbufRenderer *pr)
+{
+ pr_queue_list_free(pr->draw_queue);
+ pr->draw_queue = NULL;
+
+ pr_queue_list_free(pr->draw_queue_2pass);
+ pr->draw_queue_2pass = NULL;
+
+ if (pr->draw_idle_id != -1) g_source_remove(pr->draw_idle_id);
+ pr->draw_idle_id = -1;
+}
+
+static void pr_queue_merge(QueueData *parent, QueueData *qd)
+{
+ if (parent->x + parent->w < qd->x + qd->w)
+ {
+ parent->w += (qd->x + qd->w) - (parent->x + parent->w);
+ }
+ if (parent->x > qd->x)
+ {
+ parent->w += parent->x - qd->x;
+ parent->x = qd->x;
+ }
+
+ if (parent->y + parent->h < qd->y + qd->h)
+ {
+ parent->h += (qd->y + qd->h) - (parent->y + parent->h);
+ }
+ if (parent->y > qd->y)
+ {
+ parent->h += parent->y - qd->y;
+ parent->y = qd->y;
+ }
+
+ parent->new_data |= qd->new_data;
+}
+
+static gint pr_clamp_to_visible(PixbufRenderer *pr, gint *x, gint *y, gint *w, gint *h)
+{
+ gint nx, ny;
+ gint nw, nh;
+ gint vx, vy;
+ gint vw, vh;
+
+ vw = pr->vis_width;
+ vh = pr->vis_height;
+
+ vx = pr->x_scroll;
+ vy = pr->y_scroll;
+
+ if (*x + *w < vx || *x > vx + vw || *y + *h < vy || *y > vy + vh) return FALSE;
+
+ /* now clamp it */
+ nx = CLAMP(*x, vx, vx + vw);
+ nw = CLAMP(*w - (nx - *x), 1, vw);
+
+ ny = CLAMP(*y, vy, vy + vh);
+ nh = CLAMP(*h - (ny - *y), 1, vh);
+
+ *x = nx;
+ *y = ny;
+ *w = nw;
+ *h = nh;
+
+ return TRUE;
+}
+
+static gint pr_queue_to_tiles(PixbufRenderer *pr, gint x, gint y, gint w, gint h,
+ gint clamp, ImageTileRenderType render, gint new_data)
+{
+ gint i, j;
+ gint x1, x2;
+ gint y1, y2;
+
+ if (clamp && !pr_clamp_to_visible(pr, &x, &y, &w, &h)) return FALSE;
+
+ x1 = (gint)floor(x / pr->tile_width) * pr->tile_width;
+ x2 = (gint)ceil((x + w) / pr->tile_width) * pr->tile_width;
+
+ y1 = (gint)floor(y / pr->tile_height) * pr->tile_height;
+ y2 = (gint)ceil((y + h) / pr->tile_height) * pr->tile_height;
+
+ for (j = y1; j <= y2; j += pr->tile_height)
+ {
+ for (i = x1; i <= x2; i += pr->tile_width)
+ {
+ ImageTile *it;
+
+ it = pr_tile_get(pr, i, j);
+ if (it)
+ {
+ QueueData *qd;
+
+ if ((render == TILE_RENDER_ALL && it->render_done != TILE_RENDER_ALL) ||
+ (render == TILE_RENDER_AREA && it->render_todo != TILE_RENDER_ALL))
+ {
+ it->render_todo = render;
+ }
+
+ qd = g_new(QueueData, 1);
+ qd->it = it;
+ qd->new_data = new_data;
+
+ if (i < x)
+ {
+ qd->x = x - i;
+ }
+ else
+ {
+ qd->x = 0;
+ }
+ qd->w = x + w - i - qd->x;
+ if (qd->x + qd->w > pr->tile_width) qd->w = pr->tile_width - qd->x;
+
+ if (j < y)
+ {
+ qd->y = y - j;
+ }
+ else
+ {
+ qd->y = 0;
+ }
+ qd->h = y + h - j - qd->y;
+ if (qd->y + qd->h > pr->tile_height) qd->h = pr->tile_height - qd->y;
+
+ if (qd->w < 1 || qd->h < 1)
+ {
+ g_free(qd);
+ }
+ else if (it->qd)
+ {
+ pr_queue_merge(it->qd, qd);
+ g_free(qd);
+ }
+ else
+ {
+ it->qd = qd;
+ pr->draw_queue = g_list_append(pr->draw_queue, qd);
+ }
+ }
+ }
+ }
+
+ return TRUE;
+}
+
+static void pr_queue(PixbufRenderer *pr, gint x, gint y, gint w, gint h,
+ gint clamp, ImageTileRenderType render, gint new_data)
+{
+ gint nx, ny;
+
+ nx = CLAMP(x, 0, pr->width - 1);
+ ny = CLAMP(y, 0, pr->height - 1);
+ w -= (nx - x);
+ h -= (ny - y);
+ w = CLAMP(w, 0, pr->width - nx);
+ h = CLAMP(h, 0, pr->height - ny);
+ if (w < 1 || h < 1) return;
+
+ if (pr_queue_to_tiles(pr, nx, ny, w, h, clamp, render, new_data) &&
+ ((!pr->draw_queue && !pr->draw_queue_2pass) || pr->draw_idle_id == -1 || !pr->draw_idle_high))
+ {
+ if (pr->draw_idle_id != -1) g_source_remove(pr->draw_idle_id);
+ pr->draw_idle_id = g_idle_add_full(GDK_PRIORITY_REDRAW,
+ pr_queue_draw_idle_cb, pr, NULL);
+ pr->draw_idle_high = TRUE;
+ }
+}
+
+static void pr_redraw(PixbufRenderer *pr, gint new_data)
+{
+ pr_queue_clear(pr);
+ pr_queue(pr, 0, 0, pr->width, pr->height, TRUE, TILE_RENDER_ALL, new_data);
+}
+
+/*
+ *-------------------------------------------------------------------
+ * signal emission
+ *-------------------------------------------------------------------
+ */
+
+static void pr_update_signal(PixbufRenderer *pr)
+{
+#if 0
+ printf("FIXME: send updated signal\n");
+#endif
+}
+
+static void pr_zoom_signal(PixbufRenderer *pr)
+{
+ g_signal_emit(pr, signals[SIGNAL_ZOOM], 0, pr->zoom);
+}
+
+static void pr_scroll_notify_signal(PixbufRenderer *pr)
+{
+ g_signal_emit(pr, signals[SIGNAL_SCROLL_NOTIFY], 0);
+}
+
+static void pr_button_signal(PixbufRenderer *pr, GdkEventButton *bevent)
+{
+ g_signal_emit(pr, signals[SIGNAL_CLICKED], 0, bevent);
+}
+
+/*
+ *-------------------------------------------------------------------
+ * sync and clamp
+ *-------------------------------------------------------------------
+ */
+
+static gint pr_scroll_clamp(PixbufRenderer *pr)
+{
+ gint old_xs;
+ gint old_ys;
+
+ if (pr->zoom == 0.0)
+ {
+ pr->x_scroll = 0;
+ pr->y_scroll = 0;
+
+ pr_scroll_notify_signal(pr);
+ return FALSE;
+ }
+
+ old_xs = pr->x_scroll;
+ old_ys = pr->y_scroll;
+
+ if (pr->x_offset > 0)
+ {
+ pr->x_scroll = 0;
+ }
+ else
+ {
+ pr->x_scroll = CLAMP(pr->x_scroll, 0, pr->width - pr->vis_width);
+ }
+
+ if (pr->y_offset > 0)
+ {
+ pr->y_scroll = 0;
+ }
+ else
+ {
+ pr->y_scroll = CLAMP(pr->y_scroll, 0, pr->height - pr->vis_height);
+ }
+
+ pr_scroll_notify_signal(pr);
+
+ return (old_xs != pr->x_scroll || old_ys != pr->y_scroll);
+}
+
+static gint pr_size_clamp(PixbufRenderer *pr)
+{
+ gint old_vw, old_vh;
+
+ old_vw = pr->vis_width;
+ old_vh = pr->vis_height;
+
+ if (pr->width < pr->window_width)
+ {
+ pr->vis_width = pr->width;
+ pr->x_offset = (pr->window_width - pr->width) / 2;
+ }
+ else
+ {
+ pr->vis_width = pr->window_width;
+ pr->x_offset = 0;
+ }
+
+ if (pr->height < pr->window_height)
+ {
+ pr->vis_height = pr->height;
+ pr->y_offset = (pr->window_height - pr->height) / 2;
+ }
+ else
+ {
+ pr->vis_height = pr->window_height;
+ pr->y_offset = 0;
+ }
+
+ return (old_vw != pr->vis_width || old_vh != pr->vis_height);
+}
+
+static gint pr_zoom_clamp(PixbufRenderer *pr, gdouble zoom, gint force, gint new, gint invalidate)
+{
+ gint w, h;
+ gdouble scale;
+ gint invalid;
+
+ zoom = CLAMP(zoom, pr->zoom_min, pr->zoom_max);
+
+ if (pr->zoom == zoom && !force) return FALSE;
+
+ w = pr->image_width;
+ h = pr->image_height;
+
+ if (zoom == 0.0 && !pr->pixbuf)
+ {
+ scale = 1.0;
+ }
+ else if (zoom == 0.0)
+ {
+ gint max_w;
+ gint max_h;
+ gint sizeable;
+
+ sizeable = (new && pr_parent_window_sizable(pr));
+
+ if (sizeable)
+ {
+ max_w = gdk_screen_width();
+ max_h = gdk_screen_height();
+
+ if (pr->window_limit)
+ {
+ max_w = max_w * pr->window_limit_size / 100;
+ max_h = max_h * pr->window_limit_size / 100;
+ }
+ }
+ else
+ {
+ max_w = pr->window_width;
+ max_h = pr->window_height;
+ }
+
+ if ((pr->zoom_expand && !sizeable) || w > max_w || h > max_h)
+ {
+ if ((gdouble)max_w / w > (gdouble)max_h / h)
+ {
+ scale = (gdouble)max_h / h;
+ h = max_h;
+ w = w * scale + 0.5;
+ if (w > max_w) w = max_w;
+ }
+ else
+ {
+ scale = (gdouble)max_w / w;
+ w = max_w;
+ h = h * scale + 0.5;
+ if (h > max_h) h = max_h;
+ }
+ if (w < 1) w = 1;
+ if (h < 1) h = 1;
+ }
+ else
+ {
+ scale = 1.0;
+ }
+ }
+ else if (zoom > 0.0) /* zoom orig, in */
+ {
+ scale = zoom;
+ w = w * scale;
+ h = h * scale;
+ }
+ else /* zoom out */
+ {
+ scale = 1.0 / (0.0 - zoom);
+ w = w * scale;
+ h = h * scale;
+ }
+
+ invalid = (pr->width != w || pr->height != h);
+
+ pr->zoom = zoom;
+ pr->width = w;
+ pr->height = h;
+ pr->scale = scale;
+
+ if (invalidate || invalid)
+ {
+ pr_tile_invalidate_all(pr);
+ pr_redraw(pr, TRUE);
+ }
+
+ return TRUE;
+}
+
+static void pr_zoom_sync(PixbufRenderer *pr, gdouble zoom,
+ gint force, gint blank, gint new,
+ gint center_point, gint px, gint py)
+{
+ gdouble old_scale;
+ gint old_cx, old_cy;
+ gint clamped;
+ gint sized;
+
+ old_scale = pr->scale;
+ if (center_point)
+ {
+ px = CLAMP(px, 0, pr->width);
+ py = CLAMP(py, 0, pr->height);
+ old_cx = pr->x_scroll + (px - pr->x_offset);
+ old_cy = pr->y_scroll + (py - pr->y_offset);
+ }
+ else
+ {
+ px = py = 0;
+ old_cx = pr->x_scroll + pr->vis_width / 2;
+ old_cy = pr->y_scroll + pr->vis_height / 2;
+ }
+
+ if (!pr_zoom_clamp(pr, zoom, force, new, force)) return;
+
+ clamped = pr_size_clamp(pr);
+ sized = pr_parent_window_resize(pr, pr->width, pr->height);
+
+ if (force)
+ {
+ switch (pr->scroll_reset)
+ {
+ case PR_SCROLL_RESET_NOCHANGE:
+ /* maintain old scroll position, do nothing */
+ break;
+ case PR_SCROLL_RESET_CENTER:
+ /* center new image */
+ pr->x_scroll = ((double)pr->image_width / 2.0 * pr->scale) - pr->vis_width / 2;
+ pr->y_scroll = ((double)pr->image_height / 2.0 * pr->scale) - pr->vis_height / 2;
+ break;
+ case PR_SCROLL_RESET_TOPLEFT:
+ default:
+ /* reset to upper left */
+ pr->x_scroll = 0;
+ pr->y_scroll = 0;
+ break;
+ }
+ }
+ else
+ {
+ /* user zoom does not force, so keep visible center point */
+ if (center_point)
+ {
+ pr->x_scroll = old_cx / old_scale * pr->scale - (px - pr->x_offset);
+ pr->y_scroll = old_cy / old_scale * pr->scale - (py - pr->y_offset);
+ }
+ else
+ {
+ pr->x_scroll = old_cx / old_scale * pr->scale - (pr->vis_width / 2);
+ pr->y_scroll = old_cy / old_scale * pr->scale - (pr->vis_height / 2);
+ }
+ }
+
+ pr_scroll_clamp(pr);
+
+#if 0
+ pr_tile_sync(pr, blank);
+#endif
+
+ /* If the window was not sized, redraw the image - we know there will be no size/expose signal.
+ * But even if a size is claimed, there is no guarantee that the window manager will allow it,
+ * so redraw the window anyway :/
+ */
+ if (sized || clamped) pr_border_clear(pr);
+ pr_redraw(pr, FALSE);
+
+ pr_zoom_signal(pr);
+ pr_update_signal(pr);
+}
+
+static void pr_size_sync(PixbufRenderer *pr, gint new_width, gint new_height)
+{
+ if (pr->window_width == new_width && pr->window_height == new_height) return;
+
+ pr->window_width = new_width;
+ pr->window_height = new_height;
+
+ if (pr->zoom == 0.0) pr_zoom_clamp(pr, 0.0, TRUE, FALSE, FALSE);
+
+ pr_size_clamp(pr);
+ pr_scroll_clamp(pr);
+
+ /* ensure scroller remains visible */
+ if (pr->scroller_overlay != -1)
+ {
+ gint update = FALSE;
+
+ if (pr->scroller_x > new_width)
+ {
+ pr->scroller_x = new_width;
+ pr->scroller_xpos = new_width;
+ update = TRUE;
+ }
+ if (pr->scroller_y > new_height)
+ {
+ pr->scroller_y = new_height;
+ pr->scroller_ypos = new_height;
+ update = TRUE;
+ }
+
+ if (update)
+ {
+ GdkPixbuf *pixbuf;
+
+ if (pixbuf_renderer_overlay_get(pr, pr->scroller_overlay, &pixbuf, NULL, NULL))
+ {
+ gint w, h;
+
+ w = gdk_pixbuf_get_width(pixbuf);
+ h = gdk_pixbuf_get_height(pixbuf);
+ pixbuf_renderer_overlay_set(pr, pr->scroller_overlay, pixbuf,
+ pr->scroller_x - w / 2, pr->scroller_y - h / 2);
+ }
+ }
+ }
+
+ pr_border_clear(pr);
+
+#if 0
+ pr_tile_sync(pr, pr->width, pr->height, FALSE);
+#endif
+
+ pr_update_signal(pr);
+}
+
+static void pr_size_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer data)
+{
+ PixbufRenderer *pr = data;
+
+ pr_size_sync(pr, allocation->width, allocation->height);
+}
+
+static void pixbuf_renderer_paint(PixbufRenderer *pr, GdkRectangle *area)
+{
+ gint x, y;
+
+ pr_border_draw(pr, area->x, area->y, area->width, area->height);
+
+ x = MAX(0, (gint)area->x - pr->x_offset + pr->x_scroll);
+ y = MAX(0, (gint)area->y - pr->y_offset + pr->y_scroll);
+
+ pr_queue(pr, x, y,
+ MIN((gint)area->width, pr->width - x),
+ MIN((gint)area->height, pr->height - y),
+ FALSE, TILE_RENDER_ALL, FALSE);
+}
+
+/*
+ *-------------------------------------------------------------------
+ * scrolling
+ *-------------------------------------------------------------------
+ */
+
+void pixbuf_renderer_scroll(PixbufRenderer *pr, gint x, gint y)
+{
+ gint old_x, old_y;
+ gint x_off, y_off;
+ gint w, h;
+
+ g_return_if_fail(IS_PIXBUF_RENDERER(pr));
+
+ if (!pr->pixbuf && !pr->source_tiles_enabled) return;
+
+ old_x = pr->x_scroll;
+ old_y = pr->y_scroll;
+
+ pr->x_scroll += x;
+ pr->y_scroll += y;
+
+ pr_scroll_clamp(pr);
+ if (pr->x_scroll == old_x && pr->y_scroll == old_y) return;
+
+ if (pr->overlay_list)
+ {
+ gint new_x, new_y;
+
+ new_x = pr->x_scroll;
+ new_y = pr->y_scroll;
+ pr->x_scroll = old_x;
+ pr->y_scroll = old_y;
+
+ pr_overlay_queue_all(pr);
+
+ pr->x_scroll = new_x;
+ pr->y_scroll = new_y;
+ }
+
+ x_off = pr->x_scroll - old_x;
+ y_off = pr->y_scroll - old_y;
+
+ w = pr->vis_width - abs(x_off);
+ h = pr->vis_height - abs(y_off);
+
+ if (w < 1 || h < 1)
+ {
+ /* scrolled completely to new material */
+ pr_queue(pr, 0, 0, pr->width, pr->height, TRUE, TILE_RENDER_ALL, FALSE);
+ return;
+ }
+ else
+ {
+ gint x1, y1;
+ gint x2, y2;
+ GtkWidget *box;
+ GdkGC *gc;
+
+ if (x_off < 0)
+ {
+ x1 = abs(x_off);
+ x2 = 0;
+ }
+ else
+ {
+ x1 = 0;
+ x2 = abs(x_off);
+ }
+
+ if (y_off < 0)
+ {
+ y1 = abs(y_off);
+ y2 = 0;
+ }
+ else
+ {
+ y1 = 0;
+ y2 = abs(y_off);
+ }
+
+ box = GTK_WIDGET(pr);
+
+ gc = gdk_gc_new(box->window);
+ gdk_gc_set_exposures(gc, TRUE);
+ gdk_draw_drawable(box->window, gc,
+ box->window,
+ x2 + pr->x_offset, y2 + pr->y_offset,
+ x1 + pr->x_offset, y1 + pr->y_offset, w, h);
+ g_object_unref(gc);
+
+ if (pr->overlay_list)
+ {
+ pr_overlay_queue_all(pr);
+ }
+
+ w = pr->vis_width - w;
+ h = pr->vis_height - h;
+
+ if (w > 0)
+ {
+ pr_queue(pr,
+ x_off > 0 ? pr->x_scroll + (pr->vis_width - w) : pr->x_scroll, pr->y_scroll,
+ w, pr->vis_height, TRUE, TILE_RENDER_ALL, FALSE);
+ }
+ if (h > 0)
+ {
+ /* FIXME, to optimize this, remove overlap */
+ pr_queue(pr,
+ pr->x_scroll, y_off > 0 ? pr->y_scroll + (pr->vis_height - h) : pr->y_scroll,
+ pr->vis_width, h, TRUE, TILE_RENDER_ALL, FALSE);
+ }
+ }
+}
+
+void pixbuf_renderer_scroll_to_point(PixbufRenderer *pr, gint x, gint y,
+ gdouble x_align, gdouble y_align)
+{
+ gint px, py;
+ gint ax, ay;
+
+ x_align = CLAMP(x_align, 0.0, 1.0);
+ y_align = CLAMP(y_align, 0.0, 1.0);
+
+ ax = (gdouble)pr->vis_width * x_align;
+ ay = (gdouble)pr->vis_height * y_align;
+
+ px = (gdouble)x * pr->scale - (pr->x_scroll + ax);
+ py = (gdouble)y * pr->scale - (pr->y_scroll + ay);
+
+ pixbuf_renderer_scroll(pr, px, py);
+}
+
+/*
+ *-------------------------------------------------------------------
+ * mouse
+ *-------------------------------------------------------------------
+ */
+
+static gint pr_mouse_motion_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
+{
+ PixbufRenderer *pr;
+ gint accel;
+
+ pr = PIXBUF_RENDERER(widget);
+
+ if (pr->scroller_id != -1)
+ {
+ pr->scroller_xpos = bevent->x;
+ pr->scroller_ypos = bevent->y;
+ }
+
+ if (!pr->in_drag || !gdk_pointer_is_grabbed()) return FALSE;
+
+ if (pr->drag_moved < PR_DRAG_SCROLL_THRESHHOLD)
+ {
+ pr->drag_moved++;
+ }
+ else
+ {
+ widget_set_cursor(widget, GDK_FLEUR);
+ }
+
+ if (bevent->state & GDK_SHIFT_MASK)
+ {
+ accel = PR_PAN_SHIFT_MULTIPLIER;
+ }
+ else
+ {
+ accel = 1;
+ }
+
+ /* do the scroll */
+ pixbuf_renderer_scroll(pr, (pr->drag_last_x - bevent->x) * accel,
+ (pr->drag_last_y - bevent->y) * accel);
+
+ pr->drag_last_x = bevent->x;
+ pr->drag_last_y = bevent->y;
+
+ return FALSE;
+}
+
+static gint pr_mouse_press_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
+{
+ PixbufRenderer *pr;
+ GtkWidget *parent;
+
+ pr = PIXBUF_RENDERER(widget);
+
+ if (pr->scroller_id != -1) return TRUE;
+
+ switch (bevent->button)
+ {
+ case 1:
+ pr->in_drag = TRUE;
+ pr->drag_last_x = bevent->x;
+ pr->drag_last_y = bevent->y;
+ pr->drag_moved = 0;
+ gdk_pointer_grab(widget->window, FALSE,
+ GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
+ NULL, NULL, bevent->time);
+ gtk_grab_add(widget);
+ break;
+ case 2:
+ pr->drag_moved = 0;
+ break;
+ case 3:
+ pr_button_signal(pr, bevent);
+ break;
+ default:
+ break;
+ }
+
+ parent = gtk_widget_get_parent(widget);
+ if (widget && GTK_WIDGET_CAN_FOCUS(parent))
+ {
+ gtk_widget_grab_focus(parent);
+ }
+
+ return FALSE;
+}
+
+static gint pr_mouse_release_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
+{
+ PixbufRenderer *pr;
+
+ pr = PIXBUF_RENDERER(widget);
+
+ if (pr->scroller_id != -1)
+ {
+ pr_scroller_stop(pr);
+ return TRUE;
+ }
+
+ if (gdk_pointer_is_grabbed() && GTK_WIDGET_HAS_GRAB(pr))
+ {
+ gtk_grab_remove(widget);
+ gdk_pointer_ungrab(bevent->time);
+ widget_set_cursor(widget, -1);
+ }
+
+ if (pr->drag_moved < PR_DRAG_SCROLL_THRESHHOLD)
+ {
+ if (bevent->button == 1 && (bevent->state & GDK_SHIFT_MASK))
+ {
+ pr_scroller_start(pr, bevent->x, bevent->y);
+ }
+ else if (bevent->button == 1 || bevent->button == 2)
+ {
+ pr_button_signal(pr, bevent);
+ }
+ }
+
+ pr->in_drag = FALSE;
+
+ return FALSE;
+}
+
+static gint pr_mouse_leave_cb(GtkWidget *widget, GdkEventCrossing *event, gpointer data)
+{
+ PixbufRenderer *pr;
+
+ pr = PIXBUF_RENDERER(widget);
+
+ if (pr->scroller_id != -1)
+ {
+ pr->scroller_xpos = pr->scroller_x;
+ pr->scroller_ypos = pr->scroller_y;
+ pr->scroller_xinc = 0;
+ pr->scroller_yinc = 0;
+ }
+
+ return FALSE;
+}
+
+static void pr_mouse_drag_cb(GtkWidget *widget, GdkDragContext *context, gpointer data)
+{
+ PixbufRenderer *pr;
+
+ pr = PIXBUF_RENDERER(widget);
+
+ pr->drag_moved = PR_DRAG_SCROLL_THRESHHOLD;
+}
+
+static void pr_signals_connect(PixbufRenderer *pr)
+{
+ g_signal_connect(G_OBJECT(pr), "motion_notify_event",
+ G_CALLBACK(pr_mouse_motion_cb), pr);
+ g_signal_connect(G_OBJECT(pr), "button_press_event",
+ G_CALLBACK(pr_mouse_press_cb), pr);
+ g_signal_connect(G_OBJECT(pr), "button_release_event",
+ G_CALLBACK(pr_mouse_release_cb), pr);
+ g_signal_connect(G_OBJECT(pr), "leave_notify_event",
+ G_CALLBACK(pr_mouse_leave_cb), pr);
+
+ gtk_widget_set_events(GTK_WIDGET(pr), GDK_POINTER_MOTION_MASK |
+ GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK |
+ GDK_LEAVE_NOTIFY_MASK);
+
+ g_signal_connect(G_OBJECT(pr), "drag_begin",
+ G_CALLBACK(pr_mouse_drag_cb), pr);
+
+}
+
+/*
+ *-------------------------------------------------------------------
+ * public
+ *-------------------------------------------------------------------
+ */
+
+static void pr_pixbuf_sync(PixbufRenderer *pr, gdouble zoom, gint blank, gint new)
+{
+ if (!pr->pixbuf)
+ {
+ GtkWidget *box;
+
+ /* no pixbuf so just clear the window */
+ pr->image_width = 0;
+ pr->image_height = 0;
+ pr->scale = 1.0;
+
+ box = GTK_WIDGET(pr);
+
+ if (GTK_WIDGET_REALIZED(box))
+ {
+ gdk_window_clear(box->window);
+ pr_overlay_draw(pr, 0, 0, pr->window_width, pr->window_height);
+ }
+
+ pr_update_signal(pr);
+
+ return;
+ }
+
+ pr->image_width = gdk_pixbuf_get_width(pr->pixbuf);
+ pr->image_height = gdk_pixbuf_get_height(pr->pixbuf);
+
+ pr_zoom_sync(pr, zoom, TRUE, blank, new, FALSE, 0, 0);
+}
+
+static void pr_set_pixbuf(PixbufRenderer *pr, GdkPixbuf *pixbuf, gdouble zoom, gint new)
+{
+ if (pixbuf) g_object_ref(pixbuf);
+ if (pr->pixbuf) g_object_unref(pr->pixbuf);
+ pr->pixbuf = pixbuf;
+
+ pr_pixbuf_sync(pr, zoom, FALSE, new);
+}
+
+void pixbuf_renderer_set_pixbuf(PixbufRenderer *pr, GdkPixbuf *pixbuf, gdouble zoom)
+{
+ g_return_if_fail(IS_PIXBUF_RENDERER(pr));
+
+ pr_source_tile_unset(pr);
+
+ pr_set_pixbuf(pr, pixbuf, zoom, TRUE);
+
+ pr_update_signal(pr);
+}
+
+GdkPixbuf *pixbuf_renderer_get_pixbuf(PixbufRenderer *pr)
+{
+ g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), NULL);
+
+ return pr->pixbuf;
+}
+
+void pixbuf_renderer_area_changed(PixbufRenderer *pr, gint x, gint y, gint width, gint height)
+{
+ gint sx, sy, sw, sh;
+
+ g_return_if_fail(IS_PIXBUF_RENDERER(pr));
+
+ if (pr->source_tiles_enabled)
+ {
+ pr_source_tile_changed(pr, x, y, width, height);
+ }
+
+ if (pr->scale != 1.0 && pr->zoom_quality != GDK_INTERP_NEAREST)
+ {
+ /* increase region when using a zoom quality that may access surrounding pixels */
+ y -= 1;
+ height += 2;
+ }
+
+ sx = (gint)floor((double)x * pr->scale);
+ sy = (gint)floor((double)y * pr->scale);
+ sw = (gint)ceil((double)width * pr->scale);
+ sh = (gint)ceil((double)height * pr->scale);
+
+ pr_queue(pr, sx, sy, sw, sh, FALSE, TILE_RENDER_AREA, TRUE);
+}
+
+void pixbuf_renderer_zoom_adjust(PixbufRenderer *pr, gdouble increment)
+{
+ g_return_if_fail(IS_PIXBUF_RENDERER(pr));
+
+ pr_zoom_adjust_real(pr, increment, FALSE, 0, 0);
+}
+
+void pixbuf_renderer_zoom_adjust_at_point(PixbufRenderer *pr, gdouble increment, gint x, gint y)
+{
+ g_return_if_fail(IS_PIXBUF_RENDERER(pr));
+
+ pr_zoom_adjust_real(pr, increment, TRUE, x, y);
+}
+
+void pixbuf_renderer_zoom_set(PixbufRenderer *pr, gdouble zoom)
+{
+ g_return_if_fail(IS_PIXBUF_RENDERER(pr));
+
+ pr_zoom_sync(pr, zoom, FALSE, FALSE, FALSE, FALSE, 0, 0);
+}
+
+gdouble pixbuf_renderer_zoom_get(PixbufRenderer *pr)
+{
+ g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), 1.0);
+
+ return pr->zoom;
+}
+
+gdouble pixbuf_renderer_zoom_get_scale(PixbufRenderer *pr)
+{
+ g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), 1.0);
+
+ return pr->scale;
+}
+
+void pixbuf_renderer_zoom_set_limits(PixbufRenderer *pr, gdouble min, gdouble max)
+{
+ g_return_if_fail(IS_PIXBUF_RENDERER(pr));
+
+ if (min > 1.0 || max < 1.0) return;
+ if (min < 1.0 && min > -1.0) return;
+ if (min < -200.0 || max > 200.0) return;
+
+ if (pr->zoom_min != min)
+ {
+ pr->zoom_min = min;
+ g_object_notify(G_OBJECT(pr), "zoom_min");
+ }
+ if (pr->zoom_max != max)
+ {
+ pr->zoom_max = max;
+ g_object_notify(G_OBJECT(pr), "zoom_max");
+ }
+}
+
+gint pixbuf_renderer_get_image_size(PixbufRenderer *pr, gint *width, gint *height)
+{
+ g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
+ g_return_val_if_fail(width != NULL && height != NULL, FALSE);
+
+ if (!pr->pixbuf && !pr->source_tiles_enabled)
+ {
+ *width = 0;
+ *height = 0;
+ return FALSE;
+ }
+
+ *width = pr->image_width;
+ *height = pr->image_height;
+ return TRUE;
+}
+
+gint pixbuf_renderer_get_scaled_size(PixbufRenderer *pr, gint *width, gint *height)
+{
+ g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
+ g_return_val_if_fail(width != NULL && height != NULL, FALSE);
+
+ if (!pr->pixbuf && !pr->source_tiles_enabled)
+ {
+ *width = 0;
+ *height = 0;
+ return FALSE;
+ }
+
+ *width = pr->width;
+ *height = pr->height;
+ return TRUE;
+}
+
+gint pixbuf_renderer_get_visible_rect(PixbufRenderer *pr, GdkRectangle *rect)
+{
+ g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
+ g_return_val_if_fail(rect != NULL, FALSE);
+
+ if ((!pr->pixbuf && !pr->source_tiles_enabled) ||
+ !pr->scale)
+ {
+ rect->x = 0;
+ rect->y = 0;
+ rect->width = 0;
+ rect->height = 0;
+ return FALSE;
+ }
+
+ rect->x = (gint)((gdouble)pr->x_scroll / pr->scale);
+ rect->y = (gint)((gdouble)pr->y_scroll / pr->scale);
+ rect->width = (gint)((gdouble)pr->vis_width / pr->scale);
+ rect->height = (gint)((gdouble)pr->vis_height / pr->scale);
+ return TRUE;
+}
+
+gint pixbuf_renderer_get_virtual_rect(PixbufRenderer *pr, GdkRectangle *rect)
+{
+ g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
+ g_return_val_if_fail(rect != NULL, FALSE);
+
+ if ((!pr->pixbuf && !pr->source_tiles_enabled))
+ {
+ rect->x = 0;
+ rect->y = 0;
+ rect->width = 0;
+ rect->height = 0;
+ return FALSE;
+ }
+
+ rect->x = pr->x_scroll;
+ rect->y = pr->y_scroll;
+ rect->width = pr->vis_width;
+ rect->height = pr->vis_height;
+ return TRUE;
+}
+
+