src/loader/loader_dri3_helper.h

   1 /*
   2  * Copyright © 2013 Keith Packard
   3  * Copyright © 2015 Boyan Ding
   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 #ifndef LOADER_DRI3_HEADER_H
  25 #define LOADER_DRI3_HEADER_H
  26
  27 #include <stdbool.h>
  28 #include <stdint.h>
  29
  30 #include <xcb/xcb.h>
  31 #include <xcb/dri3.h>
  32 #include <xcb/present.h>
  33
  34 #include <GL/gl.h>
  35 #include <GL/internal/dri_interface.h>
  36 #include <c11/threads.h>
  37
  38 enum loader_dri3_buffer_type {
  39    loader_dri3_buffer_back = 0,
  40    loader_dri3_buffer_front = 1
  41 };
  42
  43 struct loader_dri3_buffer {
  44    __DRIimage   *image;
  45    __DRIimage   *linear_buffer;
  46    uint32_t     pixmap;
  47
  48    /* Synchronization between the client and X server is done using an
  49     * xshmfence that is mapped into an X server SyncFence. This lets the
  50     * client check whether the X server is done using a buffer with a simple
  51     * xshmfence call, rather than going to read X events from the wire.
  52     *
  53     * However, we can only wait for one xshmfence to be triggered at a time,
  54     * so we need to know *which* buffer is going to be idle next. We do that
  55     * by waiting for a PresentIdleNotify event. When that event arrives, the
  56     * 'busy' flag gets cleared and the client knows that the fence has been
  57     * triggered, and that the wait call will not block.
  58     */
  59
  60    uint32_t     sync_fence;     /* XID of X SyncFence object */
  61    struct xshmfence *shm_fence; /* pointer to xshmfence object */
  62    bool         busy;           /* Set on swap, cleared on IdleNotify */
  63    bool         own_pixmap;     /* We allocated the pixmap ID, free on destroy */
  64
  65    uint32_t     num_planes;
  66    uint32_t     size;
  67    int          strides[4];
  68    int          offsets[4];
  69    uint64_t     modifier;
  70    uint32_t     cpp;
  71    uint32_t     flags;
  72    uint32_t     width, height;
  73    uint64_t     last_swap;
  74 };
  75
  76
  77 #define LOADER_DRI3_MAX_BACK   4
  78 #define LOADER_DRI3_BACK_ID(i) (i)
  79 #define LOADER_DRI3_FRONT_ID   (LOADER_DRI3_MAX_BACK)
  80
  81 static inline int
  82 loader_dri3_pixmap_buf_id(enum loader_dri3_buffer_type buffer_type)
  83 {
  84    if (buffer_type == loader_dri3_buffer_back)
  85       return LOADER_DRI3_BACK_ID(0);
  86    else
  87       return LOADER_DRI3_FRONT_ID;
  88 }
  89
  90 struct loader_dri3_extensions {
  91    const __DRIcoreExtension *core;
  92    const __DRIimageDriverExtension *image_driver;
  93    const __DRI2flushExtension *flush;
  94    const __DRI2configQueryExtension *config;
  95    const __DRItexBufferExtension *tex_buffer;
  96    const __DRIimageExtension *image;
  97 };
  98
  99 struct loader_dri3_drawable;
 100
 101 struct loader_dri3_vtable {
 102    void (*set_drawable_size)(struct loader_dri3_drawable *, int, int);
 103    bool (*in_current_context)(struct loader_dri3_drawable *);
 104    __DRIcontext *(*get_dri_context)(struct loader_dri3_drawable *);
 105    __DRIscreen *(*get_dri_screen)(void);
 106    void (*flush_drawable)(struct loader_dri3_drawable *, unsigned);
 107    void (*show_fps)(struct loader_dri3_drawable *, uint64_t);
 108 };
 109
 110 #define LOADER_DRI3_NUM_BUFFERS (1 + LOADER_DRI3_MAX_BACK)
 111
 112 struct loader_dri3_drawable {
 113    xcb_connection_t *conn;
 114    __DRIdrawable *dri_drawable;
 115    xcb_drawable_t drawable;
 116    int width;
 117    int height;
 118    int depth;
 119    uint8_t have_back;
 120    uint8_t have_fake_front;
 121    uint8_t is_pixmap;
 122
 123    /* Information about the GPU owning the buffer */
 124    __DRIscreen *dri_screen;
 125    bool is_different_gpu;
 126    bool multiplanes_available;
 127
 128    /* Present extension capabilities
 129     */
 130    uint32_t present_capabilities;
 131
 132    /* SBC numbers are tracked by using the serial numbers
 133     * in the present request and complete events
 134     */
 135    uint64_t send_sbc;
 136    uint64_t recv_sbc;
 137
 138    /* Last received UST/MSC values for pixmap present complete */
 139    uint64_t ust, msc;
 140
 141    /* Last received UST/MSC values from present notify msc event */
 142    uint64_t notify_ust, notify_msc;
 143
 144    struct loader_dri3_buffer *buffers[LOADER_DRI3_NUM_BUFFERS];
 145    int cur_back;
 146    int num_back;
 147    int cur_blit_source;
 148
 149    uint32_t *stamp;
 150
 151    xcb_present_event_t eid;
 152    xcb_gcontext_t gc;
 153    xcb_special_event_t *special_event;
 154
 155    bool first_init;
 156    int swap_interval;
 157
 158    struct loader_dri3_extensions *ext;
 159    const struct loader_dri3_vtable *vtable;
 160
 161    unsigned int swap_method;
 162    unsigned int back_format;
 163    xcb_present_complete_mode_t last_present_mode;
 164
 165    /* Currently protects the following fields:
 166     * event_cnd, has_event_waiter,
 167     * recv_sbc, ust, msc, recv_msc_serial,
 168     * notify_ust, notify_msc
 169     */
 170    mtx_t mtx;
 171    cnd_t event_cnd;
 172    bool has_event_waiter;
 173 };
 174
 175 void
 176 loader_dri3_set_swap_interval(struct loader_dri3_drawable *draw,
 177                               int interval);
 178
 179 void
 180 loader_dri3_drawable_fini(struct loader_dri3_drawable *draw);
 181
 182 int
 183 loader_dri3_drawable_init(xcb_connection_t *conn,
 184                           xcb_drawable_t drawable,
 185                           __DRIscreen *dri_screen,
 186                           bool is_different_gpu,
 187                           bool is_multiplanes_available,
 188                           const __DRIconfig *dri_config,
 189                           struct loader_dri3_extensions *ext,
 190                           const struct loader_dri3_vtable *vtable,
 191                           struct loader_dri3_drawable*);
 192
 193 bool loader_dri3_wait_for_msc(struct loader_dri3_drawable *draw,
 194                               int64_t target_msc,
 195                               int64_t divisor, int64_t remainder,
 196                               int64_t *ust, int64_t *msc, int64_t *sbc);
 197
 198 int64_t
 199 loader_dri3_swap_buffers_msc(struct loader_dri3_drawable *draw,
 200                              int64_t target_msc, int64_t divisor,
 201                              int64_t remainder, unsigned flush_flags,
 202                              bool force_copy);
 203
 204 int
 205 loader_dri3_wait_for_sbc(struct loader_dri3_drawable *draw,
 206                          int64_t target_sbc, int64_t *ust,
 207                          int64_t *msc, int64_t *sbc);
 208
 209 int loader_dri3_query_buffer_age(struct loader_dri3_drawable *draw);
 210
 211 void
 212 loader_dri3_flush(struct loader_dri3_drawable *draw,
 213                   unsigned flags,
 214                   enum __DRI2throttleReason throttle_reason);
 215
 216 void
 217 loader_dri3_copy_sub_buffer(struct loader_dri3_drawable *draw,
 218                             int x, int y,
 219                             int width, int height,
 220                             bool flush);
 221
 222 void
 223 loader_dri3_copy_drawable(struct loader_dri3_drawable *draw,
 224                           xcb_drawable_t dest,
 225                           xcb_drawable_t src);
 226
 227 void
 228 loader_dri3_wait_x(struct loader_dri3_drawable *draw);
 229
 230 void
 231 loader_dri3_wait_gl(struct loader_dri3_drawable *draw);
 232
 233 int loader_dri3_open(xcb_connection_t *conn,
 234                      xcb_window_t root,
 235                      uint32_t provider);
 236
 237 __DRIimage *
 238 loader_dri3_create_image(xcb_connection_t *c,
 239                          xcb_dri3_buffer_from_pixmap_reply_t *bp_reply,
 240                          unsigned int format,
 241                          __DRIscreen *dri_screen,
 242                          const __DRIimageExtension *image,
 243                          void *loaderPrivate);
 244
 245 __DRIimage *
 246 loader_dri3_create_image_from_buffers(xcb_connection_t *c,
 247                                       xcb_dri3_buffers_from_pixmap_reply_t *bp_reply,
 248                                       unsigned int format,
 249                                       __DRIscreen *dri_screen,
 250                                       const __DRIimageExtension *image,
 251                                       void *loaderPrivate);
 252
 253 int
 254 loader_dri3_get_buffers(__DRIdrawable *driDrawable,
 255                         unsigned int format,
 256                         uint32_t *stamp,
 257                         void *loaderPrivate,
 258                         uint32_t buffer_mask,
 259                         struct __DRIimageList *buffers);
 260
 261 void
 262 loader_dri3_update_drawable_geometry(struct loader_dri3_drawable *draw);
 263
 264 void
 265 loader_dri3_swapbuffer_barrier(struct loader_dri3_drawable *draw);
 266
 267 void
 268 loader_dri3_close_screen(__DRIscreen *dri_screen);
 269 #endif