/usr/include/gthumb-2.14/gthumb/cairo-utils.h is in gthumb-dev 3:2.14.3-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 | /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* GThumb
*
* Copyright (C) 2010 Free Software Foundation, Inc.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef CAIRO_UTILS_H
#define CAIRO_UTILS_H
#include <glib.h>
#include <gdk/gdk.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <cairo.h>
#include "typedefs.h"
#define CAIRO_MAX_IMAGE_SIZE 32767
#if G_BYTE_ORDER == G_LITTLE_ENDIAN /* BGRA */
#define CAIRO_RED 2
#define CAIRO_GREEN 1
#define CAIRO_BLUE 0
#define CAIRO_ALPHA 3
#elif G_BYTE_ORDER == G_BIG_ENDIAN /* ARGB */
#define CAIRO_RED 1
#define CAIRO_GREEN 2
#define CAIRO_BLUE 3
#define CAIRO_ALPHA 0
#else /* PDP endianness: RABG */
#define CAIRO_RED 0
#define CAIRO_GREEN 3
#define CAIRO_BLUE 2
#define CAIRO_ALPHA 1
#endif
#define CAIRO_SET_RGB(pixel, red, green, blue) \
G_STMT_START { \
pixel[CAIRO_RED] = (red); \
pixel[CAIRO_GREEN] = (green); \
pixel[CAIRO_BLUE] = (blue); \
pixel[CAIRO_ALPHA] = 0xff; \
} G_STMT_END
#define CAIRO_SET_RGBA(pixel, red, green, blue, alpha) \
G_STMT_START { \
pixel[CAIRO_ALPHA] = (alpha); \
if (pixel[CAIRO_ALPHA] == 0xff) { \
pixel[CAIRO_RED] = (red); \
pixel[CAIRO_GREEN] = (green); \
pixel[CAIRO_BLUE] = (blue); \
} \
else { \
double factor = (double) pixel[CAIRO_ALPHA] / 0xff; \
pixel[CAIRO_RED] = factor * (red); \
pixel[CAIRO_GREEN] = factor * (green); \
pixel[CAIRO_BLUE] = factor * (blue); \
} \
} G_STMT_END
#define CAIRO_GET_RGB(pixel, red, green, blue) \
G_STMT_START { \
red = pixel[CAIRO_RED]; \
green = pixel[CAIRO_GREEN]; \
blue = pixel[CAIRO_BLUE]; \
} G_STMT_END
#define CAIRO_GET_RGBA(pixel, red, green, blue, alpha) \
G_STMT_START { \
alpha = pixel[CAIRO_ALPHA]; \
if (alpha == 0xff) { \
red = pixel[CAIRO_RED]; \
green = pixel[CAIRO_GREEN]; \
blue = pixel[CAIRO_BLUE]; \
} \
else { \
double factor = (double) 0xff / alpha; \
red = factor * pixel[CAIRO_RED]; \
green = factor * pixel[CAIRO_GREEN]; \
blue = factor * pixel[CAIRO_BLUE]; \
} \
} G_STMT_END
#define CAIRO_RGBA_TO_UINT32(red, green, blue, alpha) \
(((alpha) << 24) | ((red) << 16) | ((green) << 8) | (blue))
#define interpolate_value(original, reference, distance) \
(CLAMP (((distance) * (reference)) + ((1.0 - (distance)) * (original)), 0, 255))
/* types */
typedef struct {
double r;
double g;
double b;
double a;
} cairo_color_t;
typedef struct {
guchar r;
guchar g;
guchar b;
guchar a;
} cairo_color_255_t;
typedef struct {
gboolean has_alpha;
} cairo_surface_metadata_t;
extern const unsigned char cairo_channel[4];
/* math */
int _cairo_multiply_alpha (int color,
int alpha);
/* colors */
void _gdk_color_to_cairo_color (GdkColor *g_color,
cairo_color_t *c_color);
void _gdk_color_to_cairo_color_255 (GdkColor *g_color,
cairo_color_255_t *c_color);
/* surface */
void _cairo_clear_surface (cairo_surface_t **surface);
cairo_surface_metadata_t *
_cairo_image_surface_get_metadata (cairo_surface_t *surface);
gboolean _cairo_image_surface_get_has_alpha (cairo_surface_t *surface);
cairo_surface_t * _cairo_image_surface_copy (cairo_surface_t *surface);
cairo_surface_t * _cairo_image_surface_copy_subsurface (cairo_surface_t *surface,
int src_x,
int src_y,
int width,
int height);
cairo_surface_t * _cairo_image_surface_create_from_pixbuf (GdkPixbuf *pixbuf);
cairo_surface_t * _cairo_image_surface_create_compatible (cairo_surface_t *surface);
cairo_surface_t * _cairo_image_surface_scale_to (cairo_surface_t *surface,
int width,
int height,
cairo_filter_t filter);
void _cairo_image_surface_transform_get_steps (cairo_format_t format,
int width,
int height,
GthTransform transform,
int *destination_width_p,
int *destination_height_p,
int *line_start_p,
int *line_step_p,
int *pixel_step_p);
cairo_surface_t * _cairo_image_surface_transform (cairo_surface_t *surface,
GthTransform transform);
/* paint / draw */
void _cairo_paint_full_gradient (cairo_surface_t *surface,
GdkColor *h_color1,
GdkColor *h_color2,
GdkColor *v_color1,
GdkColor *v_color2);
void _cairo_draw_rounded_box (cairo_t *cr,
double x,
double y,
double w,
double h,
double r);
void _cairo_draw_drop_shadow (cairo_t *cr,
double x,
double y,
double w,
double h,
double r);
void _cairo_draw_frame (cairo_t *cr,
double x,
double y,
double w,
double h,
double r);
void _cairo_draw_slide (cairo_t *cr,
double frame_x,
double frame_y,
double frame_width,
double frame_height,
double image_width,
double image_height,
GdkColor *frame_color,
gboolean draw_inner_border);
void _cairo_paint_grid (cairo_t *cr,
GdkRectangle *rectangle,
GthGridType grid_type);
#endif /* CAIRO_UTILS_H */
|