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