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Diffstat (limited to 'mate-screenshot/screenshot-shadow.c')
| -rw-r--r-- | mate-screenshot/screenshot-shadow.c | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/mate-screenshot/screenshot-shadow.c b/mate-screenshot/screenshot-shadow.c deleted file mode 100644 index 052bb9f3..00000000 --- a/mate-screenshot/screenshot-shadow.c +++ /dev/null @@ -1,235 +0,0 @@ -/* screenshot-shadow.c - part of MATE Screenshot - * - * Copyright (C) 2001-2006 Jonathan Blandford <[email protected]> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This program 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 - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, - */ - -/* Shadow code from anders */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include "screenshot-shadow.h" -#include <math.h> - -#define BLUR_RADIUS 5 -#define SHADOW_OFFSET (BLUR_RADIUS * 4 / 5) -#define SHADOW_OPACITY 0.5 - -#define OUTLINE_RADIUS 1 -#define OUTLINE_OFFSET 0 -#define OUTLINE_OPACITY 1.0 - -#define dist(x0, y0, x1, y1) sqrt(((x0) - (x1))*((x0) - (x1)) + ((y0) - (y1))*((y0) - (y1))) - -typedef struct { - int size; - double *data; -} ConvFilter; - -static double -gaussian (double x, double y, double r) -{ - return ((1 / (2 * M_PI * r)) * - exp ((- (x * x + y * y)) / (2 * r * r))); -} - -static ConvFilter * -create_blur_filter (int radius) -{ - ConvFilter *filter; - int x, y; - double sum; - - filter = g_new0 (ConvFilter, 1); - filter->size = radius * 2 + 1; - filter->data = g_new (double, filter->size * filter->size); - - sum = 0.0; - - for (y = 0 ; y < filter->size; y++) - { - for (x = 0 ; x < filter->size; x++) - { - sum += filter->data[y * filter->size + x] = gaussian (x - (filter->size >> 1), - y - (filter->size >> 1), - radius); - } - } - - for (y = 0; y < filter->size; y++) - { - for (x = 0; x < filter->size; x++) - { - filter->data[y * filter->size + x] /= sum; - } - } - - return filter; - -} - -static ConvFilter * -create_outline_filter (int radius) -{ - ConvFilter *filter; - double *iter; - - filter = g_new0 (ConvFilter, 1); - filter->size = radius * 2 + 1; - filter->data = g_new (double, filter->size * filter->size); - - for (iter = filter->data; - iter < filter->data + (filter->size * filter->size); - iter++) - { - *iter = 1.0; - } - - return filter; -} - -static GdkPixbuf * -create_effect (GdkPixbuf *src, - ConvFilter const *filter, - int radius, - int offset, - double opacity) -{ - GdkPixbuf *dest; - int x, y, i, j; - int src_x, src_y; - int suma; - int dest_width, dest_height; - int src_width, src_height; - int src_rowstride, dest_rowstride; - gboolean src_has_alpha; - - guchar *src_pixels, *dest_pixels; - - src_has_alpha = gdk_pixbuf_get_has_alpha (src); - - src_width = gdk_pixbuf_get_width (src); - src_height = gdk_pixbuf_get_height (src); - dest_width = src_width + 2 * radius + offset; - dest_height = src_height + 2 * radius + offset; - - dest = gdk_pixbuf_new (gdk_pixbuf_get_colorspace (src), - TRUE, - gdk_pixbuf_get_bits_per_sample (src), - dest_width, dest_height); - - gdk_pixbuf_fill (dest, 0); - - src_pixels = gdk_pixbuf_get_pixels (src); - src_rowstride = gdk_pixbuf_get_rowstride (src); - - dest_pixels = gdk_pixbuf_get_pixels (dest); - dest_rowstride = gdk_pixbuf_get_rowstride (dest); - - for (y = 0; y < dest_height; y++) - { - for (x = 0; x < dest_width; x++) - { - suma = 0; - - src_x = x - radius; - src_y = y - radius; - - /* We don't need to compute effect here, since this pixel will be - * discarded when compositing */ - if (src_x >= 0 && src_x < src_width && - src_y >= 0 && src_y < src_height && - (!src_has_alpha || - src_pixels [src_y * src_rowstride + src_x * 4 + 3] == 0xFF)) - continue; - - for (i = 0; i < filter->size; i++) - { - for (j = 0; j < filter->size; j++) - { - src_y = -(radius + offset) + y - (filter->size >> 1) + i; - src_x = -(radius + offset) + x - (filter->size >> 1) + j; - - if (src_y < 0 || src_y >= src_height || - src_x < 0 || src_x >= src_width) - continue; - - suma += ( src_has_alpha ? - src_pixels [src_y * src_rowstride + src_x * 4 + 3] : - 0xFF ) * filter->data [i * filter->size + j]; - } - } - - dest_pixels [y * dest_rowstride + x * 4 + 3] = CLAMP (suma * opacity, 0x00, 0xFF); - } - } - - return dest; -} - -void -screenshot_add_shadow (GdkPixbuf **src) -{ - GdkPixbuf *dest; - static ConvFilter *filter = NULL; - - if (!filter) - filter = create_blur_filter (BLUR_RADIUS); - - dest = create_effect (*src, filter, - BLUR_RADIUS, - SHADOW_OFFSET, SHADOW_OPACITY); - - if (dest == NULL) - return; - - gdk_pixbuf_composite (*src, dest, - BLUR_RADIUS, BLUR_RADIUS, - gdk_pixbuf_get_width (*src), - gdk_pixbuf_get_height (*src), - BLUR_RADIUS, BLUR_RADIUS, 1.0, 1.0, - GDK_INTERP_BILINEAR, 255); - g_object_unref (*src); - *src = dest; -} - -void -screenshot_add_border (GdkPixbuf **src) -{ - GdkPixbuf *dest; - static ConvFilter *filter = NULL; - - if (!filter) - filter = create_outline_filter (OUTLINE_RADIUS); - - dest = create_effect (*src, filter, - OUTLINE_RADIUS, - OUTLINE_OFFSET, OUTLINE_OPACITY); - - if (dest == NULL) - return; - - gdk_pixbuf_composite (*src, dest, - OUTLINE_RADIUS, OUTLINE_RADIUS, - gdk_pixbuf_get_width (*src), - gdk_pixbuf_get_height (*src), - OUTLINE_RADIUS, OUTLINE_RADIUS, 1.0, 1.0, - GDK_INTERP_BILINEAR, 255); - g_object_unref (*src); - *src = dest; -} |