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e64ab3e4a9
This was an ill-advised extension. While we advertised SWAP_COPY support, we might implement it with a back-copy from the front buffer. And we never advertised EXCHANGE because we couldn't guarantee it. So, if you actually used this extension to try to reduce app redraws of the back buffer, you might actually increase the bandwidth you used. Whoops. Instead, GLX_EXT_buffer_age and the similar EGL extension give you feedback on what's left in your back buffer, letting you do minimum redraws. This reduces our GLX visual+fbconfig count from 1410 to 940 on an llvmpipe X server. Reducing visual counts will improve test runtime for visual-iterating tests like piglit's glx-visuals-*. Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25650>
300 lines
10 KiB
C
300 lines
10 KiB
C
/*
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* Copyright © 2013 Keith Packard
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* Copyright © 2015 Boyan Ding
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#ifndef LOADER_DRI3_HEADER_H
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#define LOADER_DRI3_HEADER_H
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#include <stdbool.h>
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#include <stdint.h>
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#include <xcb/xcb.h>
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#include <xcb/dri3.h>
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#include <xcb/present.h>
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#include <GL/gl.h>
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#include <GL/internal/dri_interface.h>
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#include <c11/threads.h>
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enum loader_dri3_buffer_type {
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loader_dri3_buffer_back = 0,
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loader_dri3_buffer_front = 1
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};
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struct loader_dri3_buffer {
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__DRIimage *image;
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uint32_t pixmap;
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/* default case: linear buffer allocated in render gpu vram.
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* p2p case: linear buffer allocated in display gpu vram and imported
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* to render gpu. p2p case is enabled when driver name matches
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* while creating screen in dri3_create_screen() function.
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*/
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__DRIimage *linear_buffer;
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/* Synchronization between the client and X server is done using an
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* xshmfence that is mapped into an X server SyncFence. This lets the
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* client check whether the X server is done using a buffer with a simple
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* xshmfence call, rather than going to read X events from the wire.
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*
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* However, we can only wait for one xshmfence to be triggered at a time,
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* so we need to know *which* buffer is going to be idle next. We do that
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* by waiting for a PresentIdleNotify event. When that event arrives, the
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* 'busy' flag gets cleared and the client knows that the fence has been
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* triggered, and that the wait call will not block.
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*/
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uint32_t sync_fence; /* XID of X SyncFence object */
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struct xshmfence *shm_fence; /* pointer to xshmfence object */
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bool busy; /* Set on swap, cleared on IdleNotify */
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bool own_pixmap; /* We allocated the pixmap ID, free on destroy */
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bool reallocate; /* Buffer should be reallocated and not reused */
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uint32_t num_planes;
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uint32_t size;
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int strides[4];
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int offsets[4];
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uint64_t modifier;
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uint32_t cpp;
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uint32_t flags;
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uint32_t width, height;
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uint64_t last_swap;
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};
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#define LOADER_DRI3_MAX_BACK 4
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#define LOADER_DRI3_BACK_ID(i) (i)
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#define LOADER_DRI3_FRONT_ID (LOADER_DRI3_MAX_BACK)
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static inline int
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loader_dri3_pixmap_buf_id(enum loader_dri3_buffer_type buffer_type)
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{
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if (buffer_type == loader_dri3_buffer_back)
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return LOADER_DRI3_BACK_ID(0);
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else
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return LOADER_DRI3_FRONT_ID;
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}
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struct loader_dri3_extensions {
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const __DRIcoreExtension *core;
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const __DRIimageDriverExtension *image_driver;
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const __DRI2flushExtension *flush;
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const __DRI2configQueryExtension *config;
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const __DRItexBufferExtension *tex_buffer;
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const __DRIimageExtension *image;
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};
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struct loader_dri3_drawable;
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struct loader_dri3_vtable {
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void (*set_drawable_size)(struct loader_dri3_drawable *, int, int);
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bool (*in_current_context)(struct loader_dri3_drawable *);
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__DRIcontext *(*get_dri_context)(struct loader_dri3_drawable *);
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__DRIscreen *(*get_dri_screen)(void);
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void (*flush_drawable)(struct loader_dri3_drawable *, unsigned);
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};
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#define LOADER_DRI3_NUM_BUFFERS (1 + LOADER_DRI3_MAX_BACK)
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enum loader_dri3_drawable_type {
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LOADER_DRI3_DRAWABLE_UNKNOWN,
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LOADER_DRI3_DRAWABLE_WINDOW,
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LOADER_DRI3_DRAWABLE_PIXMAP,
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LOADER_DRI3_DRAWABLE_PBUFFER,
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};
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struct loader_dri3_drawable {
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xcb_connection_t *conn;
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xcb_screen_t *screen;
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__DRIdrawable *dri_drawable;
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xcb_drawable_t drawable;
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xcb_window_t window;
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xcb_xfixes_region_t region;
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int width;
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int height;
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int depth;
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uint8_t have_back;
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uint8_t have_fake_front;
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enum loader_dri3_drawable_type type;
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/* Information about the GPU owning the buffer */
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bool multiplanes_available;
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bool prefer_back_buffer_reuse;
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__DRIscreen *dri_screen_render_gpu;
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/* dri_screen_display_gpu holds display GPU in case of prime gpu offloading else
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* dri_screen_render_gpu and dri_screen_display_gpu is same.
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* In case of prime gpu offloading, if display and render driver names are different
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* (potentially not compatible), dri_screen_display_gpu will be NULL but fd_display_gpu
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* will still hold fd for display driver.
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*/
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__DRIscreen *dri_screen_display_gpu;
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/* SBC numbers are tracked by using the serial numbers
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* in the present request and complete events
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*/
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uint64_t send_sbc;
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uint64_t recv_sbc;
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/* Last received UST/MSC values for pixmap present complete */
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uint64_t ust, msc;
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/* Last received UST/MSC values from present notify msc event */
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uint64_t notify_ust, notify_msc;
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struct loader_dri3_buffer *buffers[LOADER_DRI3_NUM_BUFFERS];
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int cur_back;
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int cur_num_back;
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int max_num_back;
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int cur_blit_source;
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uint32_t *stamp;
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xcb_present_event_t eid;
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xcb_gcontext_t gc;
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xcb_special_event_t *special_event;
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bool first_init;
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bool adaptive_sync;
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bool adaptive_sync_active;
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bool block_on_depleted_buffers;
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bool queries_buffer_age;
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int swap_interval;
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struct loader_dri3_extensions *ext;
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const struct loader_dri3_vtable *vtable;
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unsigned int back_format;
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xcb_present_complete_mode_t last_present_mode;
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bool is_protected_content;
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/* Currently protects the following fields:
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* event_cnd, has_event_waiter,
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* recv_sbc, ust, msc, recv_msc_serial,
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* notify_ust, notify_msc
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*/
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mtx_t mtx;
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cnd_t event_cnd;
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unsigned last_special_event_sequence;
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bool has_event_waiter;
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};
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void
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loader_dri3_set_swap_interval(struct loader_dri3_drawable *draw,
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int interval);
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void
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loader_dri3_drawable_fini(struct loader_dri3_drawable *draw);
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int
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loader_dri3_drawable_init(xcb_connection_t *conn,
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xcb_drawable_t drawable,
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enum loader_dri3_drawable_type type,
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__DRIscreen *dri_screen_render_gpu,
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__DRIscreen *dri_screen_display_gpu,
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bool is_multiplanes_available,
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bool prefer_back_buffer_reuse,
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const __DRIconfig *dri_config,
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struct loader_dri3_extensions *ext,
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const struct loader_dri3_vtable *vtable,
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struct loader_dri3_drawable*);
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bool loader_dri3_wait_for_msc(struct loader_dri3_drawable *draw,
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int64_t target_msc,
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int64_t divisor, int64_t remainder,
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int64_t *ust, int64_t *msc, int64_t *sbc);
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int64_t
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loader_dri3_swap_buffers_msc(struct loader_dri3_drawable *draw,
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int64_t target_msc, int64_t divisor,
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int64_t remainder, unsigned flush_flags,
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const int *rects, int n_rects,
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bool force_copy);
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int
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loader_dri3_wait_for_sbc(struct loader_dri3_drawable *draw,
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int64_t target_sbc, int64_t *ust,
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int64_t *msc, int64_t *sbc);
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int loader_dri3_query_buffer_age(struct loader_dri3_drawable *draw);
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void
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loader_dri3_flush(struct loader_dri3_drawable *draw,
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unsigned flags,
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enum __DRI2throttleReason throttle_reason);
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void
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loader_dri3_copy_sub_buffer(struct loader_dri3_drawable *draw,
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int x, int y,
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int width, int height,
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bool flush);
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void
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loader_dri3_copy_drawable(struct loader_dri3_drawable *draw,
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xcb_drawable_t dest,
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xcb_drawable_t src);
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void
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loader_dri3_wait_x(struct loader_dri3_drawable *draw);
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void
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loader_dri3_wait_gl(struct loader_dri3_drawable *draw);
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int loader_dri3_open(xcb_connection_t *conn,
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xcb_window_t root,
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uint32_t provider);
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__DRIimage *
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loader_dri3_create_image(xcb_connection_t *c,
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xcb_dri3_buffer_from_pixmap_reply_t *bp_reply,
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unsigned int format,
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__DRIscreen *dri_screen,
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const __DRIimageExtension *image,
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void *loaderPrivate);
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#ifdef HAVE_DRI3_MODIFIERS
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__DRIimage *
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loader_dri3_create_image_from_buffers(xcb_connection_t *c,
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xcb_dri3_buffers_from_pixmap_reply_t *bp_reply,
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unsigned int format,
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__DRIscreen *dri_screen,
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const __DRIimageExtension *image,
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void *loaderPrivate);
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#endif
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int
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loader_dri3_get_buffers(__DRIdrawable *driDrawable,
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unsigned int format,
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uint32_t *stamp,
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void *loaderPrivate,
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uint32_t buffer_mask,
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struct __DRIimageList *buffers);
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void
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loader_dri3_update_drawable_geometry(struct loader_dri3_drawable *draw);
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void
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loader_dri3_swapbuffer_barrier(struct loader_dri3_drawable *draw);
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void
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loader_dri3_close_screen(__DRIscreen *dri_screen);
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#endif
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