clients/scaler.c

   1 /*
   2  * Copyright © 2008 Kristian Høgsberg
   3  * Copyright © 2013 Collabora, Ltd.
   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 <stdio.h>
  27 #include <string.h>
  28 #include <assert.h>
  29 #include <cairo.h>
  30
  31 #include <linux/input.h>
  32
  33 #include "window.h"
  34 #include "scaler-client-protocol.h"
  35
  36 #define BUFFER_SCALE 2
  37 static const int BUFFER_WIDTH = 421 * BUFFER_SCALE;
  38 static const int BUFFER_HEIGHT = 337 * BUFFER_SCALE;
  39 static const int SURFACE_WIDTH = 55 * 4;
  40 static const int SURFACE_HEIGHT = 77 * 4;
  41 static const double RECT_X = 21 * BUFFER_SCALE; /* buffer coords */
  42 static const double RECT_Y = 25 * BUFFER_SCALE;
  43 static const double RECT_W = 55 * BUFFER_SCALE;
  44 static const double RECT_H = 77 * BUFFER_SCALE;
  45
  46 struct box {
  47         struct display *display;
  48         struct window *window;
  49         struct widget *widget;
  50         int width, height;
  51
  52         struct wl_scaler *scaler;
  53         int scaler_version;
  54         struct wl_viewport *viewport;
  55
  56         enum {
  57                 MODE_NO_VIEWPORT,
  58                 MODE_SRC_ONLY,
  59                 MODE_DST_ONLY,
  60                 MODE_SRC_DST
  61         } mode;
  62 };
  63
  64 static void
  65 set_my_viewport(struct box *box)
  66 {
  67         wl_fixed_t src_x, src_y, src_width, src_height;
  68         int32_t dst_width = SURFACE_WIDTH;
  69         int32_t dst_height = SURFACE_HEIGHT;
  70
  71         if (box->mode == MODE_NO_VIEWPORT)
  72                 return;
  73
  74         /* Cut the green border in half, take white border fully in,
  75          * and black border fully out. The borders are 1px wide in buffer.
  76          *
  77          * The gl-renderer uses linear texture sampling, this means the
  78          * top and left edges go to 100% green, bottom goes to 50% blue/black,
  79          * right edge has thick white sliding to 50% red.
  80          */
  81         src_x = wl_fixed_from_double((RECT_X + 0.5) / BUFFER_SCALE);
  82         src_y = wl_fixed_from_double((RECT_Y + 0.5) / BUFFER_SCALE);
  83         src_width = wl_fixed_from_double((RECT_W - 0.5) / BUFFER_SCALE);
  84         src_height = wl_fixed_from_double((RECT_H - 0.5) / BUFFER_SCALE);
  85
  86         if (box->scaler_version < 2 && box->mode != MODE_SRC_DST) {
  87                 fprintf(stderr, "Error: server's wl_scaler interface version "
  88                         "%d does not support this mode.\n",
  89                         box->scaler_version);
  90                 exit(1);
  91         }
  92
  93         switch (box->mode){
  94         case MODE_SRC_ONLY:
  95                 wl_viewport_set_source(box->viewport, src_x, src_y,
  96                                        src_width, src_height);
  97                 break;
  98         case MODE_DST_ONLY:
  99                 wl_viewport_set_destination(box->viewport,
 100                                             dst_width, dst_height);
 101                 break;
 102         case MODE_SRC_DST:
 103                 if (box->scaler_version < 2) {
 104                         wl_viewport_set(box->viewport,
 105                                         src_x, src_y, src_width, src_height,
 106                                         dst_width, dst_height);
 107                 } else {
 108                         wl_viewport_set_source(box->viewport, src_x, src_y,
 109                                                src_width, src_height);
 110                         wl_viewport_set_destination(box->viewport,
 111                                                     dst_width, dst_height);
 112                 }
 113                 break;
 114         default:
 115                 assert(!"not reached");
 116         }
 117 }
 118
 119 static void
 120 resize_handler(struct widget *widget,
 121                int32_t width, int32_t height, void *data)
 122 {
 123         struct box *box = data;
 124
 125         /* Dont resize me */
 126         widget_set_size(box->widget, box->width, box->height);
 127 }
 128
 129 static void
 130 redraw_handler(struct widget *widget, void *data)
 131 {
 132         struct box *box = data;
 133         cairo_surface_t *surface;
 134         cairo_t *cr;
 135
 136         surface = window_get_surface(box->window);
 137         if (surface == NULL ||
 138             cairo_surface_status(surface) != CAIRO_STATUS_SUCCESS) {
 139                 fprintf(stderr, "failed to create cairo egl surface\n");
 140                 return;
 141         }
 142
 143         cr = cairo_create(surface);
 144         cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
 145         cairo_set_line_width(cr, 1.0);
 146         cairo_translate(cr, RECT_X, RECT_Y);
 147
 148         /* red background */
 149         cairo_set_source_rgba(cr, 255, 0, 0, 255);
 150         cairo_paint(cr);
 151
 152         /* blue box */
 153         cairo_set_source_rgba(cr, 0, 0, 255, 255);
 154         cairo_rectangle(cr, 0, 0, RECT_W, RECT_H);
 155         cairo_fill(cr);
 156
 157         /* black border outside the box */
 158         cairo_set_source_rgb(cr, 0, 0, 0);
 159         cairo_move_to(cr, 0, RECT_H + 0.5);
 160         cairo_line_to(cr, RECT_W, RECT_H + 0.5);
 161         cairo_stroke(cr);
 162
 163         /* white border inside the box */
 164         cairo_set_source_rgb(cr, 1, 1, 1);
 165         cairo_move_to(cr, RECT_W - 0.5, 0);
 166         cairo_line_to(cr, RECT_W - 0.5, RECT_H);
 167         cairo_stroke(cr);
 168
 169         /* the green border on inside the box, to be split half by crop */
 170         cairo_set_source_rgb(cr, 0, 1, 0);
 171         cairo_move_to(cr, 0.5, RECT_H);
 172         cairo_line_to(cr, 0.5, 0);
 173         cairo_move_to(cr, 0, 0.5);
 174         cairo_line_to(cr, RECT_W, 0.5);
 175         cairo_stroke(cr);
 176
 177         cairo_destroy(cr);
 178
 179         /* TODO: buffer_transform */
 180
 181         cairo_surface_destroy(surface);
 182 }
 183
 184 static void
 185 global_handler(struct display *display, uint32_t name,
 186                const char *interface, uint32_t version, void *data)
 187 {
 188         struct box *box = data;
 189
 190         if (strcmp(interface, "wl_scaler") == 0) {
 191                 box->scaler_version = version < 2 ? version : 2;
 192
 193                 box->scaler = display_bind(display, name,
 194                                            &wl_scaler_interface,
 195                                            box->scaler_version);
 196
 197                 box->viewport = wl_scaler_get_viewport(box->scaler,
 198                         widget_get_wl_surface(box->widget));
 199
 200                 set_my_viewport(box);
 201         }
 202 }
 203
 204 static void
 205 button_handler(struct widget *widget,
 206                struct input *input, uint32_t time,
 207                uint32_t button, enum wl_pointer_button_state state, void *data)
 208 {
 209         struct box *box = data;
 210
 211         if (button != BTN_LEFT)
 212                 return;
 213
 214         if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
 215                 window_move(box->window, input,
 216                             display_get_serial(box->display));
 217         }
 218 }
 219
 220 static void
 221 touch_down_handler(struct widget *widget, struct input *input,
 222                    uint32_t serial, uint32_t time, int32_t id,
 223                    float x, float y, void *data)
 224 {
 225         struct box *box = data;
 226         window_move(box->window, input,
 227                     display_get_serial(box->display));
 228 }
 229
 230 static void
 231 usage(const char *progname)
 232 {
 233         fprintf(stderr, "Usage: %s [mode]\n"
 234                 "where 'mode' is one of\n"
 235                 "  -b\tset both src and dst in viewport (default)\n"
 236                 "  -d\tset only dst in viewport\n"
 237                 "  -s\tset only src in viewport\n"
 238                 "  -n\tdo not set viewport at all\n\n",
 239                 progname);
 240
 241         fprintf(stderr, "Expected output with output_scale=1:\n");
 242
 243         fprintf(stderr, "Mode -n:\n"
 244                 "  window size %dx%d px\n"
 245                 "  Red box with a blue box in the upper left part.\n"
 246                 "  The blue box has white right edge, black bottom edge,\n"
 247                 "  and thin green left and top edges that can really\n"
 248                 "  be seen only when zoomed in.\n\n",
 249                 BUFFER_WIDTH / BUFFER_SCALE, BUFFER_HEIGHT / BUFFER_SCALE);
 250
 251         fprintf(stderr, "Mode -b:\n"
 252                 "  window size %dx%d px\n"
 253                 "  Blue box with green top and left edge,\n"
 254                 "  thick white right edge with a hint of red,\n"
 255                 "  and a hint of black in bottom edge.\n\n",
 256                 SURFACE_WIDTH, SURFACE_HEIGHT);
 257
 258         fprintf(stderr, "Mode -s:\n"
 259                 "  window size %.0fx%.0f px\n"
 260                 "  The same as mode -b, but scaled a lot smaller.\n\n",
 261                 RECT_W / BUFFER_SCALE, RECT_H / BUFFER_SCALE);
 262
 263         fprintf(stderr, "Mode -d:\n"
 264                 "  window size %dx%d px\n"
 265                 "  This is horizontally squashed version of the -n mode.\n\n",
 266                 SURFACE_WIDTH, SURFACE_HEIGHT);
 267 }
 268
 269 int
 270 main(int argc, char *argv[])
 271 {
 272         struct box box;
 273         struct display *d;
 274         struct timeval tv;
 275         int i;
 276
 277         d = display_create(&argc, argv);
 278         if (d == NULL) {
 279                 fprintf(stderr, "failed to create display: %m\n");
 280                 return -1;
 281         }
 282
 283         box.mode = MODE_SRC_DST;
 284
 285         for (i = 1; i < argc; i++) {
 286                 if (strcmp("-s", argv[i]) == 0)
 287                         box.mode = MODE_SRC_ONLY;
 288                 else if (strcmp("-d", argv[i]) == 0)
 289                         box.mode = MODE_DST_ONLY;
 290                 else if (strcmp("-b", argv[i]) == 0)
 291                         box.mode = MODE_SRC_DST;
 292                 else if (strcmp("-n", argv[i]) == 0)
 293                         box.mode = MODE_NO_VIEWPORT;
 294                 else {
 295                         usage(argv[0]);
 296                         exit(1);
 297                 }
 298         }
 299
 300         gettimeofday(&tv, NULL);
 301         srandom(tv.tv_usec);
 302
 303         box.width = BUFFER_WIDTH / BUFFER_SCALE;
 304         box.height = BUFFER_HEIGHT / BUFFER_SCALE;
 305         box.display = d;
 306         box.window = window_create(d);
 307         box.widget = window_add_widget(box.window, &box);
 308         window_set_title(box.window, "Scaler Test Box");
 309         window_set_buffer_scale(box.window, BUFFER_SCALE);
 310
 311         widget_set_resize_handler(box.widget, resize_handler);
 312         widget_set_redraw_handler(box.widget, redraw_handler);
 313         widget_set_button_handler(box.widget, button_handler);
 314         widget_set_default_cursor(box.widget, CURSOR_HAND1);
 315         widget_set_touch_down_handler(box.widget, touch_down_handler);
 316
 317         window_schedule_resize(box.window, box.width, box.height);
 318
 319         display_set_user_data(box.display, &box);
 320         display_set_global_handler(box.display, global_handler);
 321
 322         display_run(d);
 323
 324         widget_destroy(box.widget);
 325         window_destroy(box.window);
 326         display_destroy(d);
 327
 328         return 0;
 329 }