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Diffstat (limited to 'libnautilus/nautilus-graphic-effects.c')
| -rw-r--r-- | libnautilus/nautilus-graphic-effects.c | 268 |
1 files changed, 0 insertions, 268 deletions
diff --git a/libnautilus/nautilus-graphic-effects.c b/libnautilus/nautilus-graphic-effects.c deleted file mode 100644 index 7424e523f..000000000 --- a/libnautilus/nautilus-graphic-effects.c +++ /dev/null @@ -1,268 +0,0 @@ -/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */ - -/* Nautilus - pixbuf manipulation routines for graphical effects. - * - * Copyright (C) 2000 Eazel, Inc - * - * Author: Andy Hertzfeld <andy@eazel.com> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -/* This file contains pixbuf manipulation routines used for graphical effects like pre-lighting - and selection hilighting */ - -#include <config.h> -#include "nautilus-graphic-effects.h" - -/* shared utility to create a new pixbuf from the passed-in one */ - -static GdkPixbuf * -create_new_pixbuf (GdkPixbuf *src) -{ - g_return_val_if_fail (gdk_pixbuf_get_colorspace (src) == GDK_COLORSPACE_RGB, NULL); - g_return_val_if_fail ((!gdk_pixbuf_get_has_alpha (src) - && gdk_pixbuf_get_n_channels (src) == 3) - || (gdk_pixbuf_get_has_alpha (src) - && gdk_pixbuf_get_n_channels (src) == 4), NULL); - - return gdk_pixbuf_new (gdk_pixbuf_get_colorspace (src), - gdk_pixbuf_get_has_alpha (src), - gdk_pixbuf_get_bits_per_sample (src), - gdk_pixbuf_get_width (src), - gdk_pixbuf_get_height (src)); -} - -/* utility routine to bump the level of a color component with pinning */ - -static guchar -lighten_component (guchar cur_value) -{ - int new_value = cur_value; - new_value += 24 + (new_value >> 3); - if (new_value > 255) { - new_value = 255; - } - return (guchar) new_value; -} - -GdkPixbuf * -nautilus_create_spotlight_pixbuf (GdkPixbuf* src) -{ - GdkPixbuf *dest; - int i, j; - int width, height, has_alpha, src_row_stride, dst_row_stride; - guchar *target_pixels, *original_pixels; - guchar *pixsrc, *pixdest; - - g_return_val_if_fail (gdk_pixbuf_get_colorspace (src) == GDK_COLORSPACE_RGB, NULL); - g_return_val_if_fail ((!gdk_pixbuf_get_has_alpha (src) - && gdk_pixbuf_get_n_channels (src) == 3) - || (gdk_pixbuf_get_has_alpha (src) - && gdk_pixbuf_get_n_channels (src) == 4), NULL); - g_return_val_if_fail (gdk_pixbuf_get_bits_per_sample (src) == 8, NULL); - - dest = create_new_pixbuf (src); - - has_alpha = gdk_pixbuf_get_has_alpha (src); - width = gdk_pixbuf_get_width (src); - height = gdk_pixbuf_get_height (src); - dst_row_stride = gdk_pixbuf_get_rowstride (dest); - src_row_stride = gdk_pixbuf_get_rowstride (src); - target_pixels = gdk_pixbuf_get_pixels (dest); - original_pixels = gdk_pixbuf_get_pixels (src); - - for (i = 0; i < height; i++) { - pixdest = target_pixels + i * dst_row_stride; - pixsrc = original_pixels + i * src_row_stride; - for (j = 0; j < width; j++) { - *pixdest++ = lighten_component (*pixsrc++); - *pixdest++ = lighten_component (*pixsrc++); - *pixdest++ = lighten_component (*pixsrc++); - if (has_alpha) { - *pixdest++ = *pixsrc++; - } - } - } - return dest; -} - - -/* the following routine was stolen from the panel to darken a pixbuf, by manipulating the saturation */ - -/* saturation is 0-255, darken is 0-255 */ - -GdkPixbuf * -nautilus_create_darkened_pixbuf (GdkPixbuf *src, int saturation, int darken) -{ - gint i, j; - gint width, height, src_row_stride, dest_row_stride; - gboolean has_alpha; - guchar *target_pixels, *original_pixels; - guchar *pixsrc, *pixdest; - guchar intensity; - guchar alpha; - guchar negalpha; - guchar r, g, b; - GdkPixbuf *dest; - - g_return_val_if_fail (gdk_pixbuf_get_colorspace (src) == GDK_COLORSPACE_RGB, NULL); - g_return_val_if_fail ((!gdk_pixbuf_get_has_alpha (src) - && gdk_pixbuf_get_n_channels (src) == 3) - || (gdk_pixbuf_get_has_alpha (src) - && gdk_pixbuf_get_n_channels (src) == 4), NULL); - g_return_val_if_fail (gdk_pixbuf_get_bits_per_sample (src) == 8, NULL); - - dest = create_new_pixbuf (src); - - has_alpha = gdk_pixbuf_get_has_alpha (src); - width = gdk_pixbuf_get_width (src); - height = gdk_pixbuf_get_height (src); - dest_row_stride = gdk_pixbuf_get_rowstride (dest); - src_row_stride = gdk_pixbuf_get_rowstride (src); - target_pixels = gdk_pixbuf_get_pixels (dest); - original_pixels = gdk_pixbuf_get_pixels (src); - - for (i = 0; i < height; i++) { - pixdest = target_pixels + i * dest_row_stride; - pixsrc = original_pixels + i * src_row_stride; - for (j = 0; j < width; j++) { - r = *pixsrc++; - g = *pixsrc++; - b = *pixsrc++; - intensity = (r * 77 + g * 150 + b * 28) >> 8; - negalpha = ((255 - saturation) * darken) >> 8; - alpha = (saturation * darken) >> 8; - *pixdest++ = (negalpha * intensity + alpha * r) >> 8; - *pixdest++ = (negalpha * intensity + alpha * g) >> 8; - *pixdest++ = (negalpha * intensity + alpha * b) >> 8; - if (has_alpha) { - *pixdest++ = *pixsrc++; - } - } - } - return dest; -} - -/* this routine colorizes the passed-in pixbuf by multiplying each pixel with the passed in color */ - -GdkPixbuf * -nautilus_create_colorized_pixbuf (GdkPixbuf *src, - int red_value, - int green_value, - int blue_value) -{ - int i, j; - int width, height, has_alpha, src_row_stride, dst_row_stride; - guchar *target_pixels; - guchar *original_pixels; - guchar *pixsrc; - guchar *pixdest; - GdkPixbuf *dest; - - g_return_val_if_fail (gdk_pixbuf_get_colorspace (src) == GDK_COLORSPACE_RGB, NULL); - g_return_val_if_fail ((!gdk_pixbuf_get_has_alpha (src) - && gdk_pixbuf_get_n_channels (src) == 3) - || (gdk_pixbuf_get_has_alpha (src) - && gdk_pixbuf_get_n_channels (src) == 4), NULL); - g_return_val_if_fail (gdk_pixbuf_get_bits_per_sample (src) == 8, NULL); - - dest = create_new_pixbuf (src); - - has_alpha = gdk_pixbuf_get_has_alpha (src); - width = gdk_pixbuf_get_width (src); - height = gdk_pixbuf_get_height (src); - src_row_stride = gdk_pixbuf_get_rowstride (src); - dst_row_stride = gdk_pixbuf_get_rowstride (dest); - target_pixels = gdk_pixbuf_get_pixels (dest); - original_pixels = gdk_pixbuf_get_pixels (src); - - for (i = 0; i < height; i++) { - pixdest = target_pixels + i*dst_row_stride; - pixsrc = original_pixels + i*src_row_stride; - for (j = 0; j < width; j++) { - *pixdest++ = (*pixsrc++ * red_value) >> 8; - *pixdest++ = (*pixsrc++ * green_value) >> 8; - *pixdest++ = (*pixsrc++ * blue_value) >> 8; - if (has_alpha) { - *pixdest++ = *pixsrc++; - } - } - } - return dest; -} - -/* this routine takes the source pixbuf and returns a new one that's semi-transparent, by - clearing every other pixel's alpha value in a checkerboard grip. We have to do the - checkerboard instead of reducing the alpha since it will be turned into an alpha-less - gdkpixmap and mask for the actual dragging */ - -GdkPixbuf * -nautilus_make_semi_transparent (GdkPixbuf *src) -{ - gint i, j, temp_alpha; - gint width, height, has_alpha, src_row_stride, dst_row_stride; - guchar *target_pixels, *original_pixels; - guchar *pixsrc, *pixdest; - guchar alpha_value; - GdkPixbuf *dest_pixbuf; - guchar start_alpha_value; - - g_return_val_if_fail (gdk_pixbuf_get_colorspace (src) == GDK_COLORSPACE_RGB, NULL); - g_return_val_if_fail ((!gdk_pixbuf_get_has_alpha (src) - && gdk_pixbuf_get_n_channels (src) == 3) - || (gdk_pixbuf_get_has_alpha (src) - && gdk_pixbuf_get_n_channels (src) == 4), NULL); - g_return_val_if_fail (gdk_pixbuf_get_bits_per_sample (src) == 8, NULL); - - dest_pixbuf = create_new_pixbuf (src); - - has_alpha = gdk_pixbuf_get_has_alpha (src); - width = gdk_pixbuf_get_width (src); - height = gdk_pixbuf_get_height (src); - src_row_stride = gdk_pixbuf_get_rowstride (src); - dst_row_stride = gdk_pixbuf_get_rowstride (dest_pixbuf); - - /* set up pointers to the actual pixels */ - target_pixels = gdk_pixbuf_get_pixels (dest_pixbuf); - original_pixels = gdk_pixbuf_get_pixels (src); - - /* loop through the pixels to do the actual work, copying from the source to the destination */ - start_alpha_value = ~0; - for (i = 0; i < height; i++) { - pixdest = target_pixels + i * dst_row_stride; - pixsrc = original_pixels + i * src_row_stride; - alpha_value = start_alpha_value; - for (j = 0; j < width; j++) { - *pixdest++ = *pixsrc++; /* red */ - *pixdest++ = *pixsrc++; /* green */ - *pixdest++ = *pixsrc++; /* blue */ - - if (has_alpha) { - temp_alpha = *pixsrc++; - } else { - temp_alpha = ~0; - } - *pixdest++ = temp_alpha & alpha_value; - - alpha_value = ~alpha_value; - } - - start_alpha_value = ~start_alpha_value; - } - - return dest_pixbuf; -} |