pixops.c

系统任务管理器

	has_alpha = gdk_pixbuf_get_has_alpha(src_pixbuf);
	w_src = gdk_pixbuf_get_width(src_pixbuf);
	h_src = gdk_pixbuf_get_height(src_pixbuf);

	if (w_dst == 0)
		w_dst = w_src;
	else if (w_dst < 0 && (w_dst = w_src * _GK.theme_scale / 100) <= 0)
		w_dst = 1;

	if (h_dst == 0)
		h_dst = h_src;
	else if (h_dst < 0 && (h_dst = h_src * _GK.theme_scale / 100) <= 0)
		h_dst = 1;

	*pixmap = gdk_pixmap_new(window, w_dst, h_dst, -1);
	if (mask && has_alpha)
		*mask = gdk_pixmap_new(window, w_dst, h_dst, 1);

	if (w_dst == w_src && h_dst == h_src)
		{
		_render_to_pixmap(src_pixbuf, pixmap, mask, 0, 0, 0, 0, w_dst, h_dst);
		return TRUE;
		}

	dst_pixbuf = gkrellm_scale_piximage_to_pixbuf(piximage, w_dst, h_dst);
	_render_to_pixmap(dst_pixbuf, pixmap, mask, 0, 0, 0, 0, w_dst, h_dst);

	g_object_unref(G_OBJECT(dst_pixbuf));
	return TRUE;
	}

void
gkrellm_paste_piximage(GkrellmPiximage *src_piximage, GdkDrawable *drawable,
		gint x_dst, gint y_dst, gint w_dst, gint h_dst)
	{
	GdkPixbuf	*dst_pixbuf;
	gint		w_src, h_src;

	if (!src_piximage || !drawable)
		return;

	w_src = gdk_pixbuf_get_width(src_piximage->pixbuf);
	h_src = gdk_pixbuf_get_height(src_piximage->pixbuf);

	if (w_dst == 0)
		w_dst = w_src;
	else if (w_dst < 0 && (w_dst = w_src * _GK.theme_scale / 100) <= 0)
		w_dst = 1;

	if (h_dst == 0)
		h_dst = h_src;
	else if (h_dst < 0 && (h_dst = h_src * _GK.theme_scale / 100) <= 0)
		h_dst = 1;

	dst_pixbuf = gkrellm_scale_piximage_to_pixbuf(src_piximage, w_dst, h_dst);
	gdk_pixbuf_render_to_drawable(dst_pixbuf, drawable, _GK.draw1_GC,
			0, 0, x_dst, y_dst,
			w_dst, h_dst, GDK_RGB_DITHER_NORMAL, 0, 0);
	g_object_unref(G_OBJECT(dst_pixbuf));
	}

void
gkrellm_paste_pixbuf(GdkPixbuf *src_pixbuf, GdkDrawable *drawable,
		gint x_dst, gint y_dst, gint w_dst, gint h_dst)
	{
	GdkPixbuf		*dst_pixbuf;
	GdkInterpType	interp_type;
	gint			w_src, h_src;

	if (!src_pixbuf || !drawable)
		return;

	w_src = gdk_pixbuf_get_width(src_pixbuf);
	h_src = gdk_pixbuf_get_height(src_pixbuf);
	if (w_dst > w_src && h_dst > h_src)
		interp_type = GDK_INTERP_NEAREST;
	else
		interp_type = GDK_INTERP_BILINEAR;

	dst_pixbuf = gdk_pixbuf_scale_simple(src_pixbuf, w_dst, h_dst,interp_type);
	gdk_pixbuf_render_to_drawable(dst_pixbuf, drawable, _GK.draw1_GC,
			0, 0, x_dst, y_dst,
			w_dst, h_dst, GDK_RGB_DITHER_NORMAL, 0, 0);
	g_object_unref(G_OBJECT(dst_pixbuf));
	}

gboolean
gkrellm_scale_theme_background(GkrellmPiximage *piximage, GdkPixmap **pixmap,
			GdkBitmap **mask, gint w_dst, gint h_dst)
	{
	GdkWindow		*window = gkrellm_get_top_window()->window;
	GdkPixbuf		*src_pixbuf, *sub_pixbuf, *pixbuf;
	GdkInterpType	interp_type;
	GkrellmBorder	bdr;
	gint			w_src, h_src, l, r, t, b;
	gint			hs, hd, ws, wd;
	gboolean		has_alpha;

	if (_GK.theme_scale == 100)
		return gkrellm_scale_piximage_to_pixmap(piximage, pixmap, mask,
					w_dst, h_dst);

	/* I want the pixmap freed even if there is no image to render back
	|  in.  Eg. theme switch to one with no data_in/out_piximage.
	*/
	gkrellm_free_pixmap(pixmap);
	gkrellm_free_bitmap(mask);

	if (!piximage || !piximage->pixbuf || !pixmap)
		return FALSE;

	src_pixbuf = piximage->pixbuf;
	has_alpha = gdk_pixbuf_get_has_alpha(src_pixbuf);
	w_src = gdk_pixbuf_get_width(src_pixbuf);
	h_src = gdk_pixbuf_get_height(src_pixbuf);

	if (w_dst == 0)
		w_dst = w_src;

	if (h_dst == 0)
		h_dst = h_src;

	*pixmap = gdk_pixmap_new(window, w_dst, h_dst, -1);
	if (mask && has_alpha)
		*mask = gdk_pixmap_new(window, w_dst, h_dst, 1);

	bdr = piximage->border;
	if (bdr.left + bdr.right >= w_src)
		fix_border_overlap(&bdr.left, &bdr.right, w_src);
	if (bdr.top + bdr.bottom >= h_src)
		fix_border_overlap(&bdr.top, &bdr.bottom, h_src);
	l = bdr.left * _GK.theme_scale / 100;
	r = bdr.right * _GK.theme_scale / 100;
	t = bdr.top * _GK.theme_scale / 100;
	b = bdr.bottom * _GK.theme_scale / 100;
	if (l + r >= w_dst)
		fix_border_overlap(&l, &r, w_dst);
	if (t + b >= h_dst)
		fix_border_overlap(&t, &b, h_dst);

	interp_type = GDK_INTERP_BILINEAR;

	if (l > 0 && t > 0)		/* top left corner */
		{
		sub_pixbuf = gdk_pixbuf_new_subpixbuf(src_pixbuf, 0, 0,
					bdr.left, bdr.top);
		pixbuf = gdk_pixbuf_scale_simple(sub_pixbuf, l, t, interp_type);
		_render_to_pixmap(pixbuf, pixmap, mask, 0, 0, 0, 0, l, t);
		g_object_unref(G_OBJECT(sub_pixbuf));
		g_object_unref(G_OBJECT(pixbuf));
		}
	if (l > 0 && b > 0)		/* bottom left corner */
		{
		sub_pixbuf = gdk_pixbuf_new_subpixbuf(src_pixbuf,
					0, h_src - bdr.bottom,
					bdr.left, bdr.bottom);
		pixbuf = gdk_pixbuf_scale_simple(sub_pixbuf, l, b, interp_type);
		_render_to_pixmap(pixbuf, pixmap, mask, 0, 0, 0, h_dst - b, l, b);
		g_object_unref(G_OBJECT(sub_pixbuf));
		g_object_unref(G_OBJECT(pixbuf));
		}
	if (r > 0 && t > 0)		/* top right corner */
		{
		sub_pixbuf = gdk_pixbuf_new_subpixbuf(src_pixbuf,
					w_src - bdr.right, 0,
					bdr.right, bdr.top);
		pixbuf = gdk_pixbuf_scale_simple(sub_pixbuf, r, t, interp_type);
		_render_to_pixmap(pixbuf, pixmap, mask, 0, 0, w_dst - r, 0, r, t);
		g_object_unref(G_OBJECT(sub_pixbuf));
		g_object_unref(G_OBJECT(pixbuf));
		}
	if (r > 0 && b > 0)		/* bottom right corner */
		{
		sub_pixbuf = gdk_pixbuf_new_subpixbuf(src_pixbuf,
					w_src - bdr.right, h_src - bdr.bottom,
					bdr.right, bdr.bottom);
		pixbuf = gdk_pixbuf_scale_simple(sub_pixbuf, r, b, interp_type);
		_render_to_pixmap(pixbuf, pixmap, mask, 0, 0,
					w_dst - r, h_dst - b, r, b);
		g_object_unref(G_OBJECT(sub_pixbuf));
		g_object_unref(G_OBJECT(pixbuf));
		}
	hs = h_src - bdr.top - bdr.bottom;
	hd = h_dst - t - b;
	if (l > 0 && hs > 0 && hd > 0)	/* left edge */
		{
		sub_pixbuf = gdk_pixbuf_new_subpixbuf(src_pixbuf, 0, bdr.top,
					bdr.left, hs);
		pixbuf = gdk_pixbuf_scale_simple(sub_pixbuf, l, hd, interp_type);
		_render_to_pixmap(pixbuf, pixmap, mask, 0, 0, 0, t, l, hd);
		g_object_unref(G_OBJECT(sub_pixbuf));
		g_object_unref(G_OBJECT(pixbuf));
		}
	if (r > 0 && hs > 0 && hd > 0)	/* right edge */
		{
		sub_pixbuf = gdk_pixbuf_new_subpixbuf(src_pixbuf,
					w_src - bdr.right, bdr.top,
					bdr.right, hs);
		pixbuf = gdk_pixbuf_scale_simple(sub_pixbuf, r, hd, interp_type);
		_render_to_pixmap(pixbuf, pixmap, mask, 0, 0, w_dst - r, t, r, hd);
		g_object_unref(G_OBJECT(sub_pixbuf));
		g_object_unref(G_OBJECT(pixbuf));
		}
	ws = w_src - bdr.left - bdr.right;
	wd = w_dst - l - r;
	if (t > 0 && ws > 0 && wd > 0)	/* top edge */
		{
		sub_pixbuf = gdk_pixbuf_new_subpixbuf(src_pixbuf,
					bdr.left, 0, ws, bdr.top);
		pixbuf = gdk_pixbuf_scale_simple(sub_pixbuf, wd, t, interp_type);
		_render_to_pixmap(pixbuf, pixmap, mask, 0, 0, l, 0, wd, t);
		g_object_unref(G_OBJECT(sub_pixbuf));
		g_object_unref(G_OBJECT(pixbuf));
		}
	if (b > 0 && ws > 0 && wd > 0)	/* bottom edge */
		{
		sub_pixbuf = gdk_pixbuf_new_subpixbuf(src_pixbuf,
					bdr.left, h_src - bdr.bottom, ws, bdr.bottom);
		pixbuf = gdk_pixbuf_scale_simple(sub_pixbuf, wd, b, interp_type);
		_render_to_pixmap(pixbuf, pixmap, mask, 0, 0, l, h_dst - b, wd, b);
		g_object_unref(G_OBJECT(sub_pixbuf));
		g_object_unref(G_OBJECT(pixbuf));
		}
	if (ws > 0 && wd > 0 && hs > 0 && hd > 0)	/* center area */
		{
		sub_pixbuf = gdk_pixbuf_new_subpixbuf(src_pixbuf,
					bdr.left, bdr.top, ws, hs);
		pixbuf = gdk_pixbuf_scale_simple(sub_pixbuf, wd, hd, interp_type);
		_render_to_pixmap(pixbuf, pixmap, mask, 0, 0, l, t, wd, hd);
		g_object_unref(G_OBJECT(sub_pixbuf));
		g_object_unref(G_OBJECT(pixbuf));
		}
	return TRUE;
	}

void
gkrellm_destroy_piximage(GkrellmPiximage *piximage)
	{
	if (!piximage || !piximage->pixbuf)
		return;
	g_object_unref(G_OBJECT(piximage->pixbuf));
	g_free(piximage);
	}

void
gkrellm_set_piximage_border(GkrellmPiximage *piximage, GkrellmBorder *border)
	{
	GkrellmBorder	*b;

	if (!piximage || !piximage->pixbuf)
		return;
	b = &piximage->border;
	*b = *border;
	if (b->left < 0)
		b->left = 0;
	if (b->right < 0)
		b->right = 0;
	if (b->top < 0)
		b->top = 0;
	if (b->bottom < 0)
		b->bottom = 0;
	}

void
gkrellm_border_adjust(GkrellmBorder *border, gint l, gint r, gint t, gint b)
	{
	border->left += l;
	border->right += r;
	border->top += t;
	border->bottom += b;
	if (border->left < 0)
		border->left = 0;
	if (border->right < 0)
		border->right = 0;
	if (border->top < 0)
		border->top = 0;
	if (border->bottom < 0)
		border->bottom = 0;
	}

GkrellmPiximage *
gkrellm_clone_piximage(GkrellmPiximage *src_piximage)
	{
	GkrellmPiximage	*piximage;

	if (!src_piximage)
		return NULL;
	piximage = g_new0(GkrellmPiximage, 1);
	piximage->border = src_piximage->border;
	piximage->pixbuf = gdk_pixbuf_copy(src_piximage->pixbuf);
	return piximage;
	}

GkrellmPiximage *
gkrellm_piximage_new_from_xpm_data(gchar **data)
	{
	GkrellmPiximage	*piximage;
	GdkPixbuf		*pixbuf;

	pixbuf = gdk_pixbuf_new_from_xpm_data((const char **) data);
	if (!pixbuf)
		return NULL;
	piximage = g_new0(GkrellmPiximage, 1);
	piximage->pixbuf = pixbuf;
	return piximage;
	}

GkrellmPiximage *
gkrellm_piximage_new_from_file(gchar *fname)
	{
	GkrellmPiximage	*piximage;
	GdkPixbuf		*pixbuf;

	pixbuf = gdk_pixbuf_new_from_file(fname, NULL);
	if (!pixbuf)
		return NULL;
	piximage = g_new0(GkrellmPiximage, 1);
	piximage->pixbuf = pixbuf;
	return piximage;
	}

GkrellmPiximage *
gkrellm_piximage_new_from_inline(const guint8 *data, gboolean copy_pixels)
	{
	GkrellmPiximage	*piximage;
	GdkPixbuf		*pixbuf;

	pixbuf = gdk_pixbuf_new_from_inline(-1, data, copy_pixels, NULL);
 	if (!pixbuf)
		return NULL;
	piximage = g_new0(GkrellmPiximage, 1);
	piximage->pixbuf = pixbuf;
	return piximage;
	}