pan-view.c

Gqview,Linux下基于GTK+库写成的轻量级而能丰富的图像浏览程序。

		case LAYOUT_SIZE_THUMB_LARGE:
			pw->thumb_size = PAN_THUMB_SIZE_LARGE;
			pw->thumb_gap = PAN_THUMB_GAP_LARGE;
			break;
		case LAYOUT_SIZE_10:
			pw->image_size = 10;
			pw->thumb_gap = PAN_THUMB_GAP_NORMAL;
			break;
		case LAYOUT_SIZE_25:
			pw->image_size = 25;
			pw->thumb_gap = PAN_THUMB_GAP_NORMAL;
			break;
		case LAYOUT_SIZE_33:
			pw->image_size = 33;
			pw->thumb_gap = PAN_THUMB_GAP_LARGE;
			break;
		case LAYOUT_SIZE_50:
			pw->image_size = 50;
			pw->thumb_gap = PAN_THUMB_GAP_HUGE;
			break;
		case LAYOUT_SIZE_100:
			pw->image_size = 100;
			pw->thumb_gap = PAN_THUMB_GAP_HUGE;
			break;
		}

	*width = 0;
	*height = 0;
	*scroll_x = 0;
	*scroll_y = 0;

	switch (pw->layout)
		{
		case LAYOUT_GRID:
		default:
			pan_window_layout_compute_grid(pw, path, width, height);
			break;
		case LAYOUT_FOLDERS_LINEAR:
			pan_window_layout_compute_folders_linear(pw, path, width, height);
			break;
		case LAYOUT_FOLDERS_FLOWER:
			pan_window_layout_compute_folders_flower(pw, path, width, height, scroll_x, scroll_y);
			break;
		case LAYOUT_CALENDAR:
			pan_window_layout_compute_calendar(pw, path, width, height);
			break;
		case LAYOUT_TIMELINE:
			pan_window_layout_compute_timeline(pw, path, width, height);
			break;
		}

	pan_cache_free(pw);

	printf("computed %d objects\n", g_list_length(pw->list));
}

static GList *pan_layout_intersect_l(GList *list, GList *item_list,
				     gint x, gint y, gint width, gint height)
{
	GList *work;

	work = item_list;
	while (work)
		{
		PanItem *pi;
		gint rx, ry, rw, rh;

		pi = work->data;
		work = work->next;

		if (util_clip_region(x, y, width, height,
				     pi->x, pi->y, pi->width, pi->height,
				     &rx, &ry, &rw, &rh))
			{
			list = g_list_prepend(list, pi);
			}
		}

	return list;
}

static GList *pan_layout_intersect(PanWindow *pw, gint x, gint y, gint width, gint height)
{
	GList *list = NULL;
	GList *grid;
	PanGrid *pg = NULL;

	grid = pw->list_grid;
	while (grid && !pg)
		{
		pg = grid->data;
		grid = grid->next;

		if (x < pg->x || x + width > pg->x + pg->w ||
		    y < pg->y || y + height > pg->y + pg->h)
			{
			pg = NULL;
			}
		}

	list = pan_layout_intersect_l(list, pw->list, x, y, width, height);

	if (pg)
		{
		list = pan_layout_intersect_l(list, pg->list, x, y, width, height);
		}
	else
		{
		list = pan_layout_intersect_l(list, pw->list_static, x, y, width, height);
		}

	return list;
}

/*
 *-----------------------------------------------------------------------------
 * tile generation
 *-----------------------------------------------------------------------------
 */

static gint pan_layout_queue_step(PanWindow *pw);


static void pan_layout_queue_thumb_done_cb(ThumbLoader *tl, gpointer data)
{
	PanWindow *pw = data;

	if (pw->queue_pi)
		{
		PanItem *pi;
		gint rc;

		pi = pw->queue_pi;
		pw->queue_pi = NULL;

		pi->queued = FALSE;

		if (pi->pixbuf) g_object_unref(pi->pixbuf);
		pi->pixbuf = thumb_loader_get_pixbuf(tl, TRUE);

		rc = pi->refcount;
		image_area_changed(pw->imd, pi->x, pi->y, pi->width, pi->height);
		pi->refcount = rc;
		}

	thumb_loader_free(pw->tl);
	pw->tl = NULL;

	while (pan_layout_queue_step(pw));
}

static void pan_layout_queue_image_done_cb(ImageLoader *il, gpointer data)
{
	PanWindow *pw = data;

	if (pw->queue_pi)
		{
		PanItem *pi;
		gint rc;

		pi = pw->queue_pi;
		pw->queue_pi = NULL;

		pi->queued = FALSE;

		if (pi->pixbuf) g_object_unref(pi->pixbuf);
		pi->pixbuf = image_loader_get_pixbuf(pw->il);
		if (pi->pixbuf) g_object_ref(pi->pixbuf);

		if (pi->pixbuf && pw->size != LAYOUT_SIZE_100 &&
		    (gdk_pixbuf_get_width(pi->pixbuf) > pi->width ||
		     gdk_pixbuf_get_height(pi->pixbuf) > pi->height))
			{
			GdkPixbuf *tmp;

			tmp = pi->pixbuf;
			pi->pixbuf = gdk_pixbuf_scale_simple(tmp, pi->width, pi->height,
							     (GdkInterpType)zoom_quality);
			g_object_unref(tmp);
			}

		rc = pi->refcount;
		image_area_changed(pw->imd, pi->x, pi->y, pi->width, pi->height);
		pi->refcount = rc;
		}

	image_loader_free(pw->il);
	pw->il = NULL;

	while (pan_layout_queue_step(pw));
}

#if 0
static void pan_layout_queue_image_area_cb(ImageLoader *il, guint x, guint y,
					   guint width, guint height, gpointer data)
{
	PanWindow *pw = data;

	if (pw->queue_pi)
		{
		PanItem *pi;
		gint rc;

		pi = pw->queue_pi;

		if (!pi->pixbuf)
			{
			pi->pixbuf = image_loader_get_pixbuf(pw->il);
			if (pi->pixbuf) g_object_ref(pi->pixbuf);
			}

		rc = pi->refcount;
		image_area_changed(pw->imd, pi->x + x, pi->y + y, width, height);
		pi->refcount = rc;
		}
}
#endif

static gint pan_layout_queue_step(PanWindow *pw)
{
	PanItem *pi;

	if (!pw->queue) return FALSE;

	pi = pw->queue->data;
	pw->queue = g_list_remove(pw->queue, pi);
	pw->queue_pi = pi;

	if (!pw->queue_pi->fd)
		{
		pw->queue_pi->queued = FALSE;
		pw->queue_pi = NULL;
		return TRUE;
		}

	image_loader_free(pw->il);
	pw->il = NULL;
	thumb_loader_free(pw->tl);
	pw->tl = NULL;

	if (pi->type == ITEM_IMAGE)
		{
		pw->il = image_loader_new(pi->fd->path);

		if (pw->size != LAYOUT_SIZE_100)
			{
			image_loader_set_requested_size(pw->il, pi->width, pi->height);
			}

#if 0
		image_loader_set_area_ready_func(pw->il, pan_layout_queue_image_area_cb, pw);
#endif
		image_loader_set_error_func(pw->il, pan_layout_queue_image_done_cb, pw);

		if (image_loader_start(pw->il, pan_layout_queue_image_done_cb, pw)) return FALSE;

		image_loader_free(pw->il);
		pw->il = NULL;
		}
	else if (pi->type == ITEM_THUMB)
		{
		pw->tl = thumb_loader_new(PAN_THUMB_SIZE, PAN_THUMB_SIZE);

		if (!pw->tl->standard_loader)
			{
			/* The classic loader will recreate a thumbnail any time we
			 * request a different size than what exists. This view will
			 * almost never use the user configured sizes so disable cache.
			 */
			thumb_loader_set_cache(pw->tl, FALSE, FALSE, FALSE);
			}

		thumb_loader_set_callbacks(pw->tl,
					   pan_layout_queue_thumb_done_cb,
					   pan_layout_queue_thumb_done_cb,
					   NULL, pw);

		if (thumb_loader_start(pw->tl, pi->fd->path)) return FALSE;

		thumb_loader_free(pw->tl);
		pw->tl = NULL;
		}

	pw->queue_pi->queued = FALSE;
	pw->queue_pi = NULL;
	return TRUE;
}

static void pan_layout_queue(PanWindow *pw, PanItem *pi)
{
	if (!pi || pi->queued || pi->pixbuf) return;
	if (pw->size <= LAYOUT_SIZE_THUMB_NONE) return;

	pi->queued = TRUE;
	pw->queue = g_list_prepend(pw->queue, pi);

	if (!pw->tl && !pw->il) while(pan_layout_queue_step(pw));
}

static gint pan_window_request_tile_cb(PixbufRenderer *pr, gint x, gint y,
				       gint width, gint height, GdkPixbuf *pixbuf, gpointer data)
{
	PanWindow *pw = data;
	GList *list;
	GList *work;
	gint i;

	pixbuf_set_rect_fill(pixbuf,
			     0, 0, width, height,
			     PAN_BACKGROUND_COLOR, 255);

	for (i = (x / PAN_GRID_SIZE) * PAN_GRID_SIZE; i < x + width; i += PAN_GRID_SIZE)
		{
		gint rx, ry, rw, rh;

		if (util_clip_region(x, y, width, height,
				     i, y, 1, height,
				     &rx, &ry, &rw, &rh))
			{
			pixbuf_draw_rect_fill(pixbuf,
					      rx - x, ry - y, rw, rh,
					      PAN_GRID_COLOR, PAN_GRID_ALPHA);
			}
		}
	for (i = (y / PAN_GRID_SIZE) * PAN_GRID_SIZE; i < y + height; i += PAN_GRID_SIZE)
		{
		gint rx, ry, rw, rh;

		if (util_clip_region(x, y, width, height,
				     x, i, width, 1,
				     &rx, &ry, &rw, &rh))
			{
			pixbuf_draw_rect_fill(pixbuf,
					      rx - x, ry - y, rw, rh,
					      PAN_GRID_COLOR, PAN_GRID_ALPHA);
			}
		}

	list = pan_layout_intersect(pw, x, y, width, height);
	work = list;
	while (work)
		{
		PanItem *pi;
		gint tx, ty, tw, th;
		gint rx, ry, rw, rh;

		pi = work->data;
		work = work->next;

		pi->refcount++;

		if (pi->type == ITEM_THUMB && pi->pixbuf)
			{
			tw = gdk_pixbuf_get_width(pi->pixbuf);
			th = gdk_pixbuf_get_height(pi->pixbuf);

			tx = pi->x + (pi->width - tw) / 2;
			ty = pi->y + (pi->height - th) / 2;

			if (gdk_pixbuf_get_has_alpha(pi->pixbuf))
				{
				if (util_clip_region(x, y, width, height,
						     tx + PAN_SHADOW_OFFSET, ty + PAN_SHADOW_OFFSET, tw, th,
						     &rx, &ry, &rw, &rh))
					{
					pixbuf_draw_shadow(pixbuf,
							   rx - x, ry - y, rw, rh,
							   tx + PAN_SHADOW_OFFSET - x, ty + PAN_SHADOW_OFFSET - y, tw, th,
							   PAN_SHADOW_FADE,
							   PAN_SHADOW_COLOR, PAN_SHADOW_ALPHA);
					}
				}
			else
				{
				if (util_clip_region(x, y, width, height,
						     tx + tw, ty + PAN_SHADOW_OFFSET,
						     PAN_SHADOW_OFFSET, th - PAN_SHADOW_OFFSET,
						     &rx, &ry, &rw, &rh))
					{
					pixbuf_draw_shadow(pixbuf,
							   rx - x, ry - y, rw, rh,
							   tx + PAN_SHADOW_OFFSET - x, ty + PAN_SHADOW_OFFSET - y, tw, th,
							   PAN_SHADOW_FADE,
							   PAN_SHADOW_COLOR, PAN_SHADOW_ALPHA);
					}
				if (util_clip_region(x, y, width, height,
						     tx + PAN_SHADOW_OFFSET, ty + th, tw, PAN_SHADOW_OFFSET,
						     &rx, &ry, &rw, &rh))
					{
					pixbuf_draw_shadow(pixbuf,
							   rx - x, ry - y, rw, rh,
							   tx + PAN_SHADOW_OFFSET - x, ty + PAN_SHADOW_OFFSET - y, tw, th,
							   PAN_SHADOW_FADE,
							   PAN_SHADOW_COLOR, PAN_SHADOW_ALPHA);
					}
				}

			if (util_clip_region(x, y, width, height,
					     tx, ty, tw, th,
					     &rx, &ry, &rw, &rh))
				{
				gdk_pixbuf_composite(pi->pixbuf, pixbuf, rx - x, ry - y, rw, rh,
						     (double) tx - x,
						     (double) ty - y,
						     1.0, 1.0, GDK_INTERP_NEAREST,
						     255);
				}

			if (util_clip_region(x, y, width, height,
					     tx, ty, tw, PAN_OUTLINE_THICKNESS,
					     &rx, &ry, &rw, &rh))
				{
				pixbuf_draw_rect_fill(pixbuf,
						      rx - x, ry - y, rw, rh,
						      PAN_OUTLINE_COLOR_1, PAN_OUTLINE_ALPHA);
				}
			if (util_clip_region(x, y, width, height,
					     tx, ty, PAN_OUTLINE_THICKNESS, th,
					     &rx, &ry, &rw, &rh))
				{
				pixbuf_draw_rect_fill(pixbuf,
						      rx - x, ry - y, rw, rh,
						      PAN_OUTLINE_COLOR_1, PAN_OUTLINE_ALPHA);
				}
			if (util_clip_region(x, y, width, height,
					     tx + tw - PAN_OUTLINE_THICKNESS, ty +  PAN_OUTLINE_THICKNESS,
					     PAN_OUTLINE_THICKNESS, th - PAN_OUTLINE_THICKNESS,
					     &rx, &ry, &rw, &rh))
				{
				pixbuf_draw_rect_fill(pixbuf,
						      rx - x, ry - y, rw, rh,
						      PAN_OUTLINE_COLOR_2, PAN_OUTLINE_ALPHA);
				}
			if (util_clip_region(x, y, width, height,
					     tx +  PAN_OUTLINE_THICKNESS, ty + th - PAN_OUTLINE_THICKNESS,
					     tw - PAN_OUTLINE_THICKNESS * 2, PAN_OUTLINE_THICKNESS,
					     &rx, &ry, &rw, &rh))
				{
				pixbuf_draw_rect_fill(pixbuf,
						      rx - x, ry - y, rw, rh,
						      PAN_OUTLINE_COLOR_2, PAN_OUTLINE_ALPHA);
				}
			}
		else if (pi->type == ITEM_THUMB)
			{
			tw = pi->width - PAN_SHADOW_OFFSET * 2;
			th = pi->height - PAN_SHADOW_OFFSET * 2;
			tx = pi->x + PAN_SHADOW_OFFSET;
			ty = pi->y + PAN_SHADOW_OFFSET;

			if (util_clip_region(x, y, width, height,
					     tx, ty, tw, th,
					     &rx, &ry, &rw, &rh))
				{
				gint d;

				d = (pw->size <= LAYOUT_SIZE_THUMB_NONE) ? 2 : 8;
				pixbuf_draw_rect_fill(pixbuf,
						      rx - x, ry - y, rw, rh,
						      PAN_SHADOW_COLOR,
						      PAN_SHADOW_ALPHA / d);
				}

			pan_layout_queue(pw, pi);
			}
		else if (pi->type == ITEM_IMAGE)
			{
			if (util_clip_region(x, y, width, height,
					     pi->x, pi->y, pi->width, pi->height,
					     &rx, &ry, &rw, &rh))
				{
				if (pi->pixbuf)
					{
					gdk_pixbuf_composite(pi->pixbuf, pixbuf, rx - x, ry - y, rw, rh,
							     (double) pi->x - x,
							     (double) pi->y - y,
							     1.0, 1.0, GDK_INTERP_NEAREST,
							     255);
					}
				else
					{
					pixbuf_draw_rect_fill(pixbuf,
							      rx - x, ry - y, rw, rh,
							      PAN_SHADOW_COLOR, PAN_SHADOW_ALPHA / 2);
					pan_layout_queue(pw, pi);
					}
				}
			}
		else if (pi->type == ITEM_BOX)
			{
			gint bw, bh;
			gint *shadow;

			bw = pi->width;
			bh = pi->height;

			shadow = pi->data;
			if (shadow)
				{
				bw -= shadow[0];
				bh -= shadow[0];

				if (pi->color_a > 254)
					{
					pixbuf_draw_shadow(pixbuf, pi->x - x + bw, pi->y - y + shadow[0],
							   shadow[0], bh - shadow[0],
							   pi->x - x + shadow[0], pi->y - y + shadow[0], bw, bh,
							   shadow[1],
							   PAN_SHADOW_COLOR, PAN_SHADOW_ALPHA);
					pixbuf_draw_shadow(pixbuf, pi->x - x + shadow[0], pi->y - y + bh,
							   bw, shadow[0],
							   pi->x - x + shadow[0], pi->y - y + shadow[0], bw, bh,
							   shadow[1],
							   PAN_SHADOW_COLOR, PAN_SHADOW_ALPHA);
					}
				else
					{
					gint a;
					a = pi->color_a * PAN_SHADOW_ALPHA >> 8;
					pixbuf_draw_shadow(pixbuf, pi->x - x + shadow[0], pi->y - y + shadow[0],
							   bw, bh,
							   pi->x - x + shadow[0], pi->y - y + shadow[0], bw, bh,
							   shadow[1],
							   PAN_SHADOW_COLOR, a);
					}
				}

			if (util_clip_region(x, y, width, height,
					     pi->x, pi->y, bw, bh,
					     &rx, &ry, &rw, &rh))
				{
				pixbuf_draw_rect_fill(pixbuf,
						      rx - x, ry - y, rw, rh,
						      pi->color_r, pi->color_g, pi->color_b, pi->color_a);
				}
			if (util_clip_region(x, y, width, height,
					     pi->x, pi->y, bw, pi->border,
					     &rx, &ry, &rw, &rh))
				{
				pixbuf_draw_rect_fill(pixbuf,
						      rx - x, ry - y, rw, rh,
						      pi->color2_r, pi->color2_g, pi->color2_b, pi->color2_a);
				}
			if (util_clip_region(x, y, width, height,
					     pi->x, pi->y + pi->border, pi->border, bh - pi->border * 2,
					     &rx, &ry, &rw, &rh))
				{
				pixbuf_draw_rect_fill(pixbuf,
						      rx - x, ry - y, rw, rh,
						      pi->color2_r, pi->color2_g, pi->color2_b, pi->color2_a);
				}
			if (util_clip_region(x, y, width, height,
					     pi->x + bw - pi->border, pi->y + pi->border,
					     pi->border, bh - pi->border * 2,
					     &rx, &ry, &rw, &rh))
				{
				pixbuf_draw_rect_fill(pixbuf,
						      rx - x, ry - y, rw, rh,
						      pi->color2_r, pi->color2_g, pi->color2_b, pi->color2_a);
				}
			if (util_clip_region(x, y, width, height,
					     pi->x, pi->y + bh - pi->border,
					     bw,  pi->border,
					     &rx, &ry, &rw, &rh))
				{
				pixbuf_draw_rect_fill(pixbuf,
						      rx - x, ry - y, rw, rh,
						      pi->color2_r, pi->color2_g, pi->color2_b, pi->color2_a);
				}
			}
		else if (pi->type == ITEM_TRIANGLE)
			{
			if (util_clip_region(x, y, width, height,
					     pi->x, pi->y, pi->width, pi->height,
					     &rx, &ry, &rw, &rh) && pi->data)
				{
				gint *coord = pi->data;
				pixbuf_draw_triangle(pixbuf,
						     rx - x, ry - y, rw, rh,
						     coord[0] - x, coord[1] - y,
						     coord[2] - x, coord[3] - y,
						     coord[4] - x, coord[5] - y,
						     pi->color_r, pi->color_g, pi->color_b, pi->color_a);

				if (pi->border & BORDER_1)
					{
					pixbuf_draw_line(pixbuf,
							 rx - x, ry - y, rw, rh,
							 coord[0] - x, coord[1] - y,
							 coord[2] - x, coord[3] - y,
							 pi->color2_r, pi->color2_g, pi->color2_b, pi->color2_a);
					}
				if (pi->border & BORDER_2)
					{
					pixbuf_draw_line(pixbuf,
							 rx - x, ry - y, rw, rh,
							 coord[2] - x, coord[3] - y,
							 coord[4] - x, coord[5] - y,
							 pi->color2_r, pi->color2_g, pi->color2_b, pi->color2_a);