shared/cairo-util.c

   1 /*
   2  * Copyright © 2008 Kristian Høgsberg
   3  * Copyright © 2012 Intel Corporation
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software and its
   6  * documentation for any purpose is hereby granted without fee, provided that
   7  * the above copyright notice appear in all copies and that both that copyright
   8  * notice and this permission notice appear in supporting documentation, and
   9  * that the name of the copyright holders not be used in advertising or
  10  * publicity pertaining to distribution of the software without specific,
  11  * written prior permission.  The copyright holders make no representations
  12  * about the suitability of this software for any purpose.  It is provided "as
  13  * is" without express or implied warranty.
  14  *
  15  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  16  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  17  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  18  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  19  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  20  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  21  * OF THIS SOFTWARE.
  22  */
  23
  24 #include "config.h"
  25
  26 #include <stdint.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <stdio.h>
  30 #include <math.h>
  31 #include <wayland-util.h>
  32 #include <cairo.h>
  33 #include "cairo-util.h"
  34
  35 #include "image-loader.h"
  36 #include "config-parser.h"
  37
  38 #define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
  39
  40 void
  41 surface_flush_device(cairo_surface_t *surface)
  42 {
  43         cairo_device_t *device;
  44
  45         device = cairo_surface_get_device(surface);
  46         if (device)
  47                 cairo_device_flush(device);
  48 }
  49
  50 static int
  51 blur_surface(cairo_surface_t *surface, int margin)
  52 {
  53         int32_t width, height, stride, x, y, z, w;
  54         uint8_t *src, *dst;
  55         uint32_t *s, *d, a, p;
  56         int i, j, k, size, half;
  57         uint32_t kernel[71];
  58         double f;
  59
  60         size = ARRAY_LENGTH(kernel);
  61         width = cairo_image_surface_get_width(surface);
  62         height = cairo_image_surface_get_height(surface);
  63         stride = cairo_image_surface_get_stride(surface);
  64         src = cairo_image_surface_get_data(surface);
  65
  66         dst = malloc(height * stride);
  67         if (dst == NULL)
  68                 return -1;
  69
  70         half = size / 2;
  71         a = 0;
  72         for (i = 0; i < size; i++) {
  73                 f = (i - half);
  74                 kernel[i] = exp(- f * f / ARRAY_LENGTH(kernel)) * 10000;
  75                 a += kernel[i];
  76         }
  77
  78         for (i = 0; i < height; i++) {
  79                 s = (uint32_t *) (src + i * stride);
  80                 d = (uint32_t *) (dst + i * stride);
  81                 for (j = 0; j < width; j++) {
  82                         if (margin < j && j < width - margin) {
  83                                 d[j] = s[j];
  84                                 continue;
  85                         }
  86
  87                         x = 0;
  88                         y = 0;
  89                         z = 0;
  90                         w = 0;
  91                         for (k = 0; k < size; k++) {
  92                                 if (j - half + k < 0 || j - half + k >= width)
  93                                         continue;
  94                                 p = s[j - half + k];
  95
  96                                 x += (p >> 24) * kernel[k];
  97                                 y += ((p >> 16) & 0xff) * kernel[k];
  98                                 z += ((p >> 8) & 0xff) * kernel[k];
  99                                 w += (p & 0xff) * kernel[k];
 100                         }
 101                         d[j] = (x / a << 24) | (y / a << 16) | (z / a << 8) | w / a;
 102                 }
 103         }
 104
 105         for (i = 0; i < height; i++) {
 106                 s = (uint32_t *) (dst + i * stride);
 107                 d = (uint32_t *) (src + i * stride);
 108                 for (j = 0; j < width; j++) {
 109                         if (margin <= i && i < height - margin) {
 110                                 d[j] = s[j];
 111                                 continue;
 112                         }
 113
 114                         x = 0;
 115                         y = 0;
 116                         z = 0;
 117                         w = 0;
 118                         for (k = 0; k < size; k++) {
 119                                 if (i - half + k < 0 || i - half + k >= height)
 120                                         continue;
 121                                 s = (uint32_t *) (dst + (i - half + k) * stride);
 122                                 p = s[j];
 123
 124                                 x += (p >> 24) * kernel[k];
 125                                 y += ((p >> 16) & 0xff) * kernel[k];
 126                                 z += ((p >> 8) & 0xff) * kernel[k];
 127                                 w += (p & 0xff) * kernel[k];
 128                         }
 129                         d[j] = (x / a << 24) | (y / a << 16) | (z / a << 8) | w / a;
 130                 }
 131         }
 132
 133         free(dst);
 134         cairo_surface_mark_dirty(surface);
 135
 136         return 0;
 137 }
 138
 139 void
 140 tile_mask(cairo_t *cr, cairo_surface_t *surface,
 141           int x, int y, int width, int height, int margin, int top_margin)
 142 {
 143         cairo_pattern_t *pattern;
 144         cairo_matrix_t matrix;
 145         int i, fx, fy, vmargin;
 146
 147         cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
 148         pattern = cairo_pattern_create_for_surface (surface);
 149         cairo_pattern_set_filter(pattern, CAIRO_FILTER_NEAREST);
 150
 151         for (i = 0; i < 4; i++) {
 152                 fx = i & 1;
 153                 fy = i >> 1;
 154
 155                 cairo_matrix_init_translate(&matrix,
 156                                             -x + fx * (128 - width),
 157                                             -y + fy * (128 - height));
 158                 cairo_pattern_set_matrix(pattern, &matrix);
 159
 160                 if (fy)
 161                         vmargin = margin;
 162                 else
 163                         vmargin = top_margin;
 164
 165                 cairo_reset_clip(cr);
 166                 cairo_rectangle(cr,
 167                                 x + fx * (width - margin),
 168                                 y + fy * (height - vmargin),
 169                                 margin, vmargin);
 170                 cairo_clip (cr);
 171                 cairo_mask(cr, pattern);
 172         }
 173
 174         /* Top stretch */
 175         cairo_matrix_init_translate(&matrix, 60, 0);
 176         cairo_matrix_scale(&matrix, 8.0 / width, 1);
 177         cairo_matrix_translate(&matrix, -x - width / 2, -y);
 178         cairo_pattern_set_matrix(pattern, &matrix);
 179         cairo_rectangle(cr, x + margin, y, width - 2 * margin, margin);
 180
 181         cairo_reset_clip(cr);
 182         cairo_rectangle(cr,
 183                         x + margin,
 184                         y,
 185                         width - 2 * margin, margin);
 186         cairo_clip (cr);
 187         cairo_mask(cr, pattern);
 188
 189         /* Bottom stretch */
 190         cairo_matrix_translate(&matrix, 0, -height + 128);
 191         cairo_pattern_set_matrix(pattern, &matrix);
 192
 193         cairo_reset_clip(cr);
 194         cairo_rectangle(cr, x + margin, y + height - margin,
 195                         width - 2 * margin, margin);
 196         cairo_clip (cr);
 197         cairo_mask(cr, pattern);
 198
 199         /* Left stretch */
 200         cairo_matrix_init_translate(&matrix, 0, 60);
 201         cairo_matrix_scale(&matrix, 1, 8.0 / height);
 202         cairo_matrix_translate(&matrix, -x, -y - height / 2);
 203         cairo_pattern_set_matrix(pattern, &matrix);
 204         cairo_reset_clip(cr);
 205         cairo_rectangle(cr, x, y + margin, margin, height - 2 * margin);
 206         cairo_clip (cr);
 207         cairo_mask(cr, pattern);
 208
 209         /* Right stretch */
 210         cairo_matrix_translate(&matrix, -width + 128, 0);
 211         cairo_pattern_set_matrix(pattern, &matrix);
 212         cairo_rectangle(cr, x + width - margin, y + margin,
 213                         margin, height - 2 * margin);
 214         cairo_reset_clip(cr);
 215         cairo_clip (cr);
 216         cairo_mask(cr, pattern);
 217
 218         cairo_pattern_destroy(pattern);
 219         cairo_reset_clip(cr);
 220 }
 221
 222 void
 223 tile_source(cairo_t *cr, cairo_surface_t *surface,
 224             int x, int y, int width, int height, int margin, int top_margin)
 225 {
 226         cairo_pattern_t *pattern;
 227         cairo_matrix_t matrix;
 228         int i, fx, fy, vmargin;
 229
 230         cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
 231         pattern = cairo_pattern_create_for_surface (surface);
 232         cairo_pattern_set_filter(pattern, CAIRO_FILTER_NEAREST);
 233         cairo_set_source(cr, pattern);
 234         cairo_pattern_destroy(pattern);
 235
 236         for (i = 0; i < 4; i++) {
 237                 fx = i & 1;
 238                 fy = i >> 1;
 239
 240                 cairo_matrix_init_translate(&matrix,
 241                                             -x + fx * (128 - width),
 242                                             -y + fy * (128 - height));
 243                 cairo_pattern_set_matrix(pattern, &matrix);
 244
 245                 if (fy)
 246                         vmargin = margin;
 247                 else
 248                         vmargin = top_margin;
 249
 250                 cairo_rectangle(cr,
 251                                 x + fx * (width - margin),
 252                                 y + fy * (height - vmargin),
 253                                 margin, vmargin);
 254                 cairo_fill(cr);
 255         }
 256
 257         /* Top stretch */
 258         cairo_matrix_init_translate(&matrix, 60, 0);
 259         cairo_matrix_scale(&matrix, 8.0 / (width - 2 * margin), 1);
 260         cairo_matrix_translate(&matrix, -x - width / 2, -y);
 261         cairo_pattern_set_matrix(pattern, &matrix);
 262         cairo_rectangle(cr, x + margin, y, width - 2 * margin, top_margin);
 263         cairo_fill(cr);
 264
 265         /* Bottom stretch */
 266         cairo_matrix_translate(&matrix, 0, -height + 128);
 267         cairo_pattern_set_matrix(pattern, &matrix);
 268         cairo_rectangle(cr, x + margin, y + height - margin,
 269                         width - 2 * margin, margin);
 270         cairo_fill(cr);
 271
 272         /* Left stretch */
 273         cairo_matrix_init_translate(&matrix, 0, 60);
 274         cairo_matrix_scale(&matrix, 1, 8.0 / (height - margin - top_margin));
 275         cairo_matrix_translate(&matrix, -x, -y - height / 2);
 276         cairo_pattern_set_matrix(pattern, &matrix);
 277         cairo_rectangle(cr, x, y + top_margin,
 278                         margin, height - margin - top_margin);
 279         cairo_fill(cr);
 280
 281         /* Right stretch */
 282         cairo_matrix_translate(&matrix, -width + 128, 0);
 283         cairo_pattern_set_matrix(pattern, &matrix);
 284         cairo_rectangle(cr, x + width - margin, y + top_margin,
 285                         margin, height - margin - top_margin);
 286         cairo_fill(cr);
 287 }
 288
 289 void
 290 rounded_rect(cairo_t *cr, int x0, int y0, int x1, int y1, int radius)
 291 {
 292         cairo_move_to(cr, x0, y0 + radius);
 293         cairo_arc(cr, x0 + radius, y0 + radius, radius, M_PI, 3 * M_PI / 2);
 294         cairo_line_to(cr, x1 - radius, y0);
 295         cairo_arc(cr, x1 - radius, y0 + radius, radius, 3 * M_PI / 2, 2 * M_PI);
 296         cairo_line_to(cr, x1, y1 - radius);
 297         cairo_arc(cr, x1 - radius, y1 - radius, radius, 0, M_PI / 2);
 298         cairo_line_to(cr, x0 + radius, y1);
 299         cairo_arc(cr, x0 + radius, y1 - radius, radius, M_PI / 2, M_PI);
 300         cairo_close_path(cr);
 301 }
 302
 303 cairo_surface_t *
 304 load_cairo_surface(const char *filename)
 305 {
 306         pixman_image_t *image;
 307         int width, height, stride;
 308         void *data;
 309
 310         image = load_image(filename);
 311         if (image == NULL) {
 312                 return NULL;
 313         }
 314
 315         data = pixman_image_get_data(image);
 316         width = pixman_image_get_width(image);
 317         height = pixman_image_get_height(image);
 318         stride = pixman_image_get_stride(image);
 319
 320         return cairo_image_surface_create_for_data(data, CAIRO_FORMAT_ARGB32,
 321                                                    width, height, stride);
 322 }
 323
 324 void
 325 theme_set_background_source(struct theme *t, cairo_t *cr, uint32_t flags)
 326 {
 327         cairo_pattern_t *pattern;
 328
 329         if (flags & THEME_FRAME_ACTIVE) {
 330                 pattern = cairo_pattern_create_linear(16, 16, 16, 112);
 331                 cairo_pattern_add_color_stop_rgb(pattern, 0.0, 1.0, 1.0, 1.0);
 332                 cairo_pattern_add_color_stop_rgb(pattern, 0.2, 0.8, 0.8, 0.8);
 333                 cairo_set_source(cr, pattern);
 334                 cairo_pattern_destroy(pattern);
 335         } else {
 336                 cairo_set_source_rgba(cr, 0.75, 0.75, 0.75, 1);
 337         }
 338 }
 339
 340 struct theme *
 341 theme_create(void)
 342 {
 343         struct theme *t;
 344         cairo_t *cr;
 345
 346         t = malloc(sizeof *t);
 347         if (t == NULL)
 348                 return NULL;
 349
 350         t->margin = 32;
 351         t->width = 6;
 352         t->titlebar_height = 27;
 353         t->frame_radius = 3;
 354         t->shadow = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 128, 128);
 355         cr = cairo_create(t->shadow);
 356         cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
 357         cairo_set_source_rgba(cr, 0, 0, 0, 1);
 358         rounded_rect(cr, 32, 32, 96, 96, t->frame_radius);
 359         cairo_fill(cr);
 360         if (cairo_status (cr) != CAIRO_STATUS_SUCCESS)
 361                 goto err_shadow;
 362         cairo_destroy(cr);
 363         if (blur_surface(t->shadow, 64) == -1)
 364                 goto err_shadow;
 365
 366         t->active_frame =
 367                 cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 128, 128);
 368         cr = cairo_create(t->active_frame);
 369         cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
 370
 371         theme_set_background_source(t, cr, THEME_FRAME_ACTIVE);
 372         rounded_rect(cr, 0, 0, 128, 128, t->frame_radius);
 373         cairo_fill(cr);
 374
 375         if (cairo_status(cr) != CAIRO_STATUS_SUCCESS)
 376                 goto err_active_frame;
 377
 378         cairo_destroy(cr);
 379
 380         t->inactive_frame =
 381                 cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 128, 128);
 382         cr = cairo_create(t->inactive_frame);
 383         cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
 384         theme_set_background_source(t, cr, 0);
 385         rounded_rect(cr, 0, 0, 128, 128, t->frame_radius);
 386         cairo_fill(cr);
 387
 388         if (cairo_status (cr) != CAIRO_STATUS_SUCCESS)
 389                 goto err_inactive_frame;
 390
 391         cairo_destroy(cr);
 392
 393         return t;
 394
 395  err_inactive_frame:
 396         cairo_surface_destroy(t->inactive_frame);
 397  err_active_frame:
 398         cairo_surface_destroy(t->active_frame);
 399  err_shadow:
 400         cairo_surface_destroy(t->shadow);
 401         free(t);
 402         return NULL;
 403 }
 404
 405 void
 406 theme_destroy(struct theme *t)
 407 {
 408         cairo_surface_destroy(t->active_frame);
 409         cairo_surface_destroy(t->inactive_frame);
 410         cairo_surface_destroy(t->shadow);
 411         free(t);
 412 }
 413
 414 void
 415 theme_render_frame(struct theme *t,
 416                    cairo_t *cr, int width, int height,
 417                    const char *title, struct wl_list *buttons,
 418                    uint32_t flags)
 419 {
 420         cairo_text_extents_t extents;
 421         cairo_font_extents_t font_extents;
 422         cairo_surface_t *source;
 423         int x, y, margin, top_margin;
 424
 425         cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
 426         cairo_set_source_rgba(cr, 0, 0, 0, 0);
 427         cairo_paint(cr);
 428
 429         if (flags & THEME_FRAME_MAXIMIZED)
 430                 margin = 0;
 431         else {
 432                 cairo_set_source_rgba(cr, 0, 0, 0, 0.45);
 433                 tile_mask(cr, t->shadow,
 434                           2, 2, width + 8, height + 8,
 435                           64, 64);
 436                 margin = t->margin;
 437         }
 438
 439         if (flags & THEME_FRAME_ACTIVE)
 440                 source = t->active_frame;
 441         else
 442                 source = t->inactive_frame;
 443
 444         if (title || !wl_list_empty(buttons))
 445                 top_margin = t->titlebar_height;
 446         else
 447                 top_margin = t->width;
 448
 449         tile_source(cr, source,
 450                     margin, margin,
 451                     width - margin * 2, height - margin * 2,
 452                     t->width, top_margin);
 453
 454         if (title || !wl_list_empty(buttons)) {
 455                 cairo_rectangle (cr, margin + t->width, margin,
 456                                  width - (margin + t->width) * 2,
 457                                  t->titlebar_height - t->width);
 458                 cairo_clip(cr);
 459
 460                 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
 461                 cairo_select_font_face(cr, "sans",
 462                                        CAIRO_FONT_SLANT_NORMAL,
 463                                        CAIRO_FONT_WEIGHT_BOLD);
 464                 cairo_set_font_size(cr, 14);
 465                 cairo_text_extents(cr, title, &extents);
 466                 cairo_font_extents (cr, &font_extents);
 467                 x = (width - extents.width) / 2;
 468                 y = margin +
 469                         (t->titlebar_height -
 470                          font_extents.ascent - font_extents.descent) / 2 +
 471                         font_extents.ascent;
 472
 473                 if (flags & THEME_FRAME_ACTIVE) {
 474                         cairo_move_to(cr, x + 1, y  + 1);
 475                         cairo_set_source_rgb(cr, 1, 1, 1);
 476                         cairo_show_text(cr, title);
 477                         cairo_move_to(cr, x, y);
 478                         cairo_set_source_rgb(cr, 0, 0, 0);
 479                         cairo_show_text(cr, title);
 480                 } else {
 481                         cairo_move_to(cr, x, y);
 482                         cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 483                         cairo_show_text(cr, title);
 484                 }
 485         }
 486 }
 487
 488 enum theme_location
 489 theme_get_location(struct theme *t, int x, int y,
 490                                 int width, int height, int flags)
 491 {
 492         int vlocation, hlocation, location;
 493         int margin, top_margin, grip_size;
 494
 495         if (flags & THEME_FRAME_MAXIMIZED) {
 496                 margin = 0;
 497                 grip_size = 0;
 498         } else {
 499                 margin = t->margin;
 500                 grip_size = 8;
 501         }
 502
 503         if (flags & THEME_FRAME_NO_TITLE)
 504                 top_margin = t->width;
 505         else
 506                 top_margin = t->titlebar_height;
 507
 508         if (x < margin)
 509                 hlocation = THEME_LOCATION_EXTERIOR;
 510         else if (x < margin + grip_size)
 511                 hlocation = THEME_LOCATION_RESIZING_LEFT;
 512         else if (x < width - margin - grip_size)
 513                 hlocation = THEME_LOCATION_INTERIOR;
 514         else if (x < width - margin)
 515                 hlocation = THEME_LOCATION_RESIZING_RIGHT;
 516         else
 517                 hlocation = THEME_LOCATION_EXTERIOR;
 518
 519         if (y < margin)
 520                 vlocation = THEME_LOCATION_EXTERIOR;
 521         else if (y < margin + grip_size)
 522                 vlocation = THEME_LOCATION_RESIZING_TOP;
 523         else if (y < height - margin - grip_size)
 524                 vlocation = THEME_LOCATION_INTERIOR;
 525         else if (y < height - margin)
 526                 vlocation = THEME_LOCATION_RESIZING_BOTTOM;
 527         else
 528                 vlocation = THEME_LOCATION_EXTERIOR;
 529
 530         location = vlocation | hlocation;
 531         if (location & THEME_LOCATION_EXTERIOR)
 532                 location = THEME_LOCATION_EXTERIOR;
 533         if (location == THEME_LOCATION_INTERIOR &&
 534             y < margin + top_margin)
 535                 location = THEME_LOCATION_TITLEBAR;
 536         else if (location == THEME_LOCATION_INTERIOR)
 537                 location = THEME_LOCATION_CLIENT_AREA;
 538
 539         return location;
 540 }