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Diffstat (limited to 'src/glx/dri3_glx.c')
| -rw-r--r-- | src/glx/dri3_glx.c | 1831 |
1 files changed, 1831 insertions, 0 deletions
diff --git a/src/glx/dri3_glx.c b/src/glx/dri3_glx.c new file mode 100644 index 00000000000..a78fc800bdb --- /dev/null +++ b/src/glx/dri3_glx.c @@ -0,0 +1,1831 @@ +/* + * Copyright © 2013 Keith Packard + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting documentation, and + * that the name of the copyright holders not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. The copyright holders make no representations + * about the suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * OF THIS SOFTWARE. + */ + +/* + * Portions of this code were adapted from dri2_glx.c which carries the + * following copyright: + * + * Copyright © 2008 Red Hat, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Soft- + * ware"), to deal in the Software without restriction, including without + * limitation the rights to use, copy, modify, merge, publish, distribute, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, provided that the above copyright + * notice(s) and this permission notice appear in all copies of the Soft- + * ware and that both the above copyright notice(s) and this permission + * notice appear in supporting documentation. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL- + * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY + * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN + * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE- + * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR- + * MANCE OF THIS SOFTWARE. + * + * Except as contained in this notice, the name of a copyright holder shall + * not be used in advertising or otherwise to promote the sale, use or + * other dealings in this Software without prior written authorization of + * the copyright holder. + * + * Authors: + * Kristian Høgsberg ([email protected]) + */ + +#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL) + +#include <X11/Xlib.h> +#include <X11/extensions/Xfixes.h> +#include <X11/Xlib-xcb.h> +#include <X11/xshmfence.h> +#include <xcb/xcb.h> +#include <xcb/dri3.h> +#include <xcb/present.h> +#include <GL/gl.h> +#include "glapi.h" +#include "glxclient.h" +#include "xf86dri.h" +#include <dlfcn.h> +#include <fcntl.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/mman.h> +#include <sys/time.h> + +#include "xf86drm.h" +#include "dri_common.h" +#include "dri3_priv.h" + +static const struct glx_context_vtable dri3_context_vtable; + +static inline void +dri3_fence_reset(xcb_connection_t *c, struct dri3_buffer *buffer) +{ + xshmfence_reset(buffer->shm_fence); +} + +static inline void +dri3_fence_set(struct dri3_buffer *buffer) +{ + xshmfence_trigger(buffer->shm_fence); +} + +static inline void +dri3_fence_trigger(xcb_connection_t *c, struct dri3_buffer *buffer) +{ + xcb_sync_trigger_fence(c, buffer->sync_fence); +} + +static inline void +dri3_fence_await(xcb_connection_t *c, struct dri3_buffer *buffer) +{ + xcb_flush(c); + xshmfence_await(buffer->shm_fence); +} + +static inline Bool +dri3_fence_triggered(struct dri3_buffer *buffer) +{ + return xshmfence_query(buffer->shm_fence); +} + +static void +dri3_destroy_context(struct glx_context *context) +{ + struct dri3_context *pcp = (struct dri3_context *) context; + struct dri3_screen *psc = (struct dri3_screen *) context->psc; + + driReleaseDrawables(&pcp->base); + + free((char *) context->extensions); + + (*psc->core->destroyContext) (pcp->driContext); + + free(pcp); +} + +static Bool +dri3_bind_context(struct glx_context *context, struct glx_context *old, + GLXDrawable draw, GLXDrawable read) +{ + struct dri3_context *pcp = (struct dri3_context *) context; + struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc; + struct dri3_drawable *pdraw, *pread; + + pdraw = (struct dri3_drawable *) driFetchDrawable(context, draw); + pread = (struct dri3_drawable *) driFetchDrawable(context, read); + + driReleaseDrawables(&pcp->base); + + if (pdraw == NULL || pread == NULL) + return GLXBadDrawable; + + if (!(*psc->core->bindContext) (pcp->driContext, + pdraw->driDrawable, pread->driDrawable)) + return GLXBadContext; + + return Success; +} + +static void +dri3_unbind_context(struct glx_context *context, struct glx_context *new) +{ + struct dri3_context *pcp = (struct dri3_context *) context; + struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc; + + (*psc->core->unbindContext) (pcp->driContext); +} + +static struct glx_context * +dri3_create_context(struct glx_screen *base, + struct glx_config *config_base, + struct glx_context *shareList, int renderType) +{ + struct dri3_context *pcp, *pcp_shared; + struct dri3_screen *psc = (struct dri3_screen *) base; + __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base; + __DRIcontext *shared = NULL; + + if (shareList) { + /* If the shareList context is not a DRI3 context, we cannot possibly + * create a DRI3 context that shares it. + */ + if (shareList->vtable->destroy != dri3_destroy_context) { + return NULL; + } + + pcp_shared = (struct dri3_context *) shareList; + shared = pcp_shared->driContext; + } + + pcp = calloc(1, sizeof *pcp); + if (pcp == NULL) + return NULL; + + if (!glx_context_init(&pcp->base, &psc->base, &config->base)) { + free(pcp); + return NULL; + } + + pcp->driContext = + (*psc->image_driver->createNewContext) (psc->driScreen, + config->driConfig, shared, pcp); + + if (pcp->driContext == NULL) { + free(pcp); + return NULL; + } + + pcp->base.vtable = &dri3_context_vtable; + + return &pcp->base; +} + +static struct glx_context * +dri3_create_context_attribs(struct glx_screen *base, + struct glx_config *config_base, + struct glx_context *shareList, + unsigned num_attribs, + const uint32_t *attribs, + unsigned *error) +{ + struct dri3_context *pcp = NULL; + struct dri3_context *pcp_shared = NULL; + struct dri3_screen *psc = (struct dri3_screen *) base; + __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base; + __DRIcontext *shared = NULL; + + uint32_t minor_ver = 1; + uint32_t major_ver = 2; + uint32_t flags = 0; + unsigned api; + int reset = __DRI_CTX_RESET_NO_NOTIFICATION; + uint32_t ctx_attribs[2 * 5]; + unsigned num_ctx_attribs = 0; + uint32_t render_type; + + /* Remap the GLX tokens to DRI2 tokens. + */ + if (!dri2_convert_glx_attribs(num_attribs, attribs, + &major_ver, &minor_ver, + &render_type, &flags, &api, + &reset, error)) + goto error_exit; + + /* Check the renderType value */ + if (!validate_renderType_against_config(config_base, render_type)) + goto error_exit; + + if (shareList) { + pcp_shared = (struct dri3_context *) shareList; + shared = pcp_shared->driContext; + } + + pcp = calloc(1, sizeof *pcp); + if (pcp == NULL) { + *error = __DRI_CTX_ERROR_NO_MEMORY; + goto error_exit; + } + + if (!glx_context_init(&pcp->base, &psc->base, &config->base)) + goto error_exit; + + ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION; + ctx_attribs[num_ctx_attribs++] = major_ver; + ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION; + ctx_attribs[num_ctx_attribs++] = minor_ver; + + /* Only send a value when the non-default value is requested. By doing + * this we don't have to check the driver's DRI3 version before sending the + * default value. + */ + if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) { + ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY; + ctx_attribs[num_ctx_attribs++] = reset; + } + + if (flags != 0) { + ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS; + + /* The current __DRI_CTX_FLAG_* values are identical to the + * GLX_CONTEXT_*_BIT values. + */ + ctx_attribs[num_ctx_attribs++] = flags; + } + + pcp->driContext = + (*psc->image_driver->createContextAttribs) (psc->driScreen, + api, + config->driConfig, + shared, + num_ctx_attribs / 2, + ctx_attribs, + error, + pcp); + + if (pcp->driContext == NULL) + goto error_exit; + + pcp->base.vtable = &dri3_context_vtable; + + return &pcp->base; + +error_exit: + free(pcp); + + return NULL; +} + +static void +dri3_destroy_drawable(__GLXDRIdrawable *base) +{ + struct dri3_screen *psc = (struct dri3_screen *) base->psc; + struct dri3_drawable *pdraw = (struct dri3_drawable *) base; + + (*psc->core->destroyDrawable) (pdraw->driDrawable); + + free(pdraw); +} + +static __GLXDRIdrawable * +dri3_create_drawable(struct glx_screen *base, XID xDrawable, + GLXDrawable drawable, struct glx_config *config_base) +{ + struct dri3_drawable *pdraw; + struct dri3_screen *psc = (struct dri3_screen *) base; + __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base; + GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1; + + pdraw = calloc(1, sizeof(*pdraw)); + if (!pdraw) + return NULL; + + pdraw->base.destroyDrawable = dri3_destroy_drawable; + pdraw->base.xDrawable = xDrawable; + pdraw->base.drawable = drawable; + pdraw->base.psc = &psc->base; + pdraw->swap_interval = 1; /* default may be overridden below */ + pdraw->have_back = 0; + pdraw->have_fake_front = 0; + + if (psc->config) + psc->config->configQueryi(psc->driScreen, + "vblank_mode", &vblank_mode); + + switch (vblank_mode) { + case DRI_CONF_VBLANK_NEVER: + case DRI_CONF_VBLANK_DEF_INTERVAL_0: + pdraw->swap_interval = 0; + break; + case DRI_CONF_VBLANK_DEF_INTERVAL_1: + case DRI_CONF_VBLANK_ALWAYS_SYNC: + default: + pdraw->swap_interval = 1; + break; + } + + (void) __glXInitialize(psc->base.dpy); + + /* Create a new drawable */ + pdraw->driDrawable = + (*psc->image_driver->createNewDrawable) (psc->driScreen, + config->driConfig, pdraw); + + if (!pdraw->driDrawable) { + free(pdraw); + return NULL; + } + + /* + * Make sure server has the same swap interval we do for the new + * drawable. + */ + if (psc->vtable.setSwapInterval) + psc->vtable.setSwapInterval(&pdraw->base, pdraw->swap_interval); + + return &pdraw->base; +} + +/* + * Process one Present event + */ +static void +dri3_handle_present_event(struct dri3_drawable *priv, xcb_present_generic_event_t *ge) +{ + switch (ge->evtype) { + case XCB_PRESENT_CONFIGURE_NOTIFY: { + xcb_present_configure_notify_event_t *ce = (void *) ge; + + priv->width = ce->width; + priv->height = ce->height; + break; + } + case XCB_PRESENT_COMPLETE_NOTIFY: { + xcb_present_complete_notify_event_t *ce = (void *) ge; + + if (ce->kind == XCB_PRESENT_COMPLETE_KIND_PIXMAP) + priv->present_event_serial = ce->serial; + else + priv->present_msc_event_serial = ce->serial; + priv->ust = ce->ust; + priv->msc = ce->msc; + break; + } + case XCB_PRESENT_EVENT_IDLE_NOTIFY: { + xcb_present_idle_notify_event_t *ie = (void *) ge; + int b; + + for (b = 0; b < sizeof (priv->buffers) / sizeof (priv->buffers[0]); b++) { + struct dri3_buffer *buf = priv->buffers[b]; + + if (buf && buf->pixmap == ie->pixmap) { + buf->busy = 0; + break; + } + } + break; + } + } + free(ge); +} + +static int +dri3_wait_for_msc(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor, + int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc) +{ + xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy); + struct dri3_drawable *priv = (struct dri3_drawable *) pdraw; + xcb_generic_event_t *ev; + xcb_present_generic_event_t *ge; + + /* Ask for the an event for the target MSC */ + ++priv->present_msc_request_serial; + xcb_present_notify_msc(c, + priv->base.xDrawable, + priv->present_msc_request_serial, + target_msc, + divisor, + remainder); + + xcb_flush(c); + + /* Wait for the event */ + if (priv->special_event) { + while (priv->present_msc_request_serial != priv->present_msc_event_serial) { + ev = xcb_wait_for_special_event(c, priv->special_event); + if (!ev) + break; + ge = (void *) ev; + dri3_handle_present_event(priv, ge); + } + } + + *ust = priv->ust; + *msc = priv->msc; + *sbc = priv->sbc; + + return 1; +} + +static int +dri3_drawable_get_msc(struct glx_screen *psc, __GLXDRIdrawable *pdraw, + int64_t *ust, int64_t *msc, int64_t *sbc) +{ + return dri3_wait_for_msc(pdraw, 0, 0, 0, ust, msc,sbc); +} + +/** dri3_wait_for_sbc + * + * Wait for the swap buffer count to increase. The only way this + * can happen is if some other thread is doing swap buffers as + * we no longer share swap buffer counts with other processes. + * + * I'm not sure this is actually useful as such, and so this + * implementation is a kludge that just polls once a second + */ +static int +dri3_wait_for_sbc(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust, + int64_t *msc, int64_t *sbc) +{ + struct dri3_drawable *priv = (struct dri3_drawable *) pdraw; + + while (priv->sbc < target_sbc) { + sleep(1); + } + return dri3_wait_for_msc(pdraw, 0, 0, 0, ust, msc, sbc); +} + +/** + * Asks the driver to flush any queued work necessary for serializing with the + * X command stream, and optionally the slightly more strict requirement of + * glFlush() equivalence (which would require flushing even if nothing had + * been drawn to a window system framebuffer, for example). + */ +static void +dri3_flush(struct dri3_screen *psc, + struct dri3_drawable *draw, + unsigned flags, + enum __DRI2throttleReason throttle_reason) +{ + struct glx_context *gc = __glXGetCurrentContext(); + + if (gc) { + struct dri3_context *dri3Ctx = (struct dri3_context *)gc; + + (*psc->f->flush_with_flags)(dri3Ctx->driContext, draw->driDrawable, flags, throttle_reason); + } +} + +static xcb_gcontext_t +dri3_drawable_gc(struct dri3_drawable *priv) +{ + if (!priv->gc) { + uint32_t v; + xcb_connection_t *c = XGetXCBConnection(priv->base.psc->dpy); + + v = 0; + xcb_create_gc(c, + (priv->gc = xcb_generate_id(c)), + priv->base.xDrawable, + XCB_GC_GRAPHICS_EXPOSURES, + &v); + } + return priv->gc; +} + +static struct dri3_buffer * +dri3_back_buffer(struct dri3_drawable *priv) +{ + return priv->buffers[DRI3_BACK_ID(priv->cur_back)]; +} + +static struct dri3_buffer * +dri3_fake_front_buffer(struct dri3_drawable *priv) +{ + return priv->buffers[DRI3_FRONT_ID]; +} + +static void +dri3_copy_area (xcb_connection_t *c /**< */, + xcb_drawable_t src_drawable /**< */, + xcb_drawable_t dst_drawable /**< */, + xcb_gcontext_t gc /**< */, + int16_t src_x /**< */, + int16_t src_y /**< */, + int16_t dst_x /**< */, + int16_t dst_y /**< */, + uint16_t width /**< */, + uint16_t height /**< */) +{ + xcb_void_cookie_t cookie; + + cookie = xcb_copy_area_checked(c, + src_drawable, + dst_drawable, + gc, + src_x, + src_y, + dst_x, + dst_y, + width, + height); + xcb_discard_reply(c, cookie.sequence); +} + +static void +dri3_copy_sub_buffer(__GLXDRIdrawable *pdraw, int x, int y, + int width, int height, + Bool flush) +{ + struct dri3_drawable *priv = (struct dri3_drawable *) pdraw; + struct dri3_screen *psc = (struct dri3_screen *) pdraw->psc; + xcb_connection_t *c = XGetXCBConnection(priv->base.psc->dpy); + struct dri3_buffer *back = dri3_back_buffer(priv); + + unsigned flags; + + /* Check we have the right attachments */ + if (!priv->have_back || priv->is_pixmap) + return; + + flags = __DRI2_FLUSH_DRAWABLE; + if (flush) + flags |= __DRI2_FLUSH_CONTEXT; + dri3_flush(psc, priv, flags, __DRI2_THROTTLE_SWAPBUFFER); + + y = priv->height - y - height; + + dri3_fence_reset(c, back); + dri3_copy_area(c, + dri3_back_buffer(priv)->pixmap, + priv->base.xDrawable, + dri3_drawable_gc(priv), + x, y, x, y, width, height); + dri3_fence_trigger(c, back); + /* Refresh the fake front (if present) after we just damaged the real + * front. + */ + if (priv->have_fake_front) { + dri3_fence_reset(c, dri3_fake_front_buffer(priv)); + dri3_copy_area(c, + dri3_back_buffer(priv)->pixmap, + dri3_fake_front_buffer(priv)->pixmap, + dri3_drawable_gc(priv), + x, y, x, y, width, height); + dri3_fence_trigger(c, dri3_fake_front_buffer(priv)); + dri3_fence_await(c, dri3_fake_front_buffer(priv)); + } + dri3_fence_await(c, back); +} + +static void +dri3_copy_drawable(struct dri3_drawable *priv, Drawable dest, Drawable src) +{ + struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc; + xcb_connection_t *c = XGetXCBConnection(priv->base.psc->dpy); + + dri3_flush(psc, priv, __DRI2_FLUSH_DRAWABLE, 0); + + dri3_fence_reset(c, dri3_fake_front_buffer(priv)); + dri3_copy_area(c, + src, dest, + dri3_drawable_gc(priv), + 0, 0, 0, 0, priv->width, priv->height); + dri3_fence_trigger(c, dri3_fake_front_buffer(priv)); + dri3_fence_await(c, dri3_fake_front_buffer(priv)); +} + +static void +dri3_wait_x(struct glx_context *gc) +{ + struct dri3_drawable *priv = (struct dri3_drawable *) + GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable); + + if (priv == NULL || !priv->have_fake_front) + return; + + dri3_copy_drawable(priv, dri3_fake_front_buffer(priv)->pixmap, priv->base.xDrawable); +} + +static void +dri3_wait_gl(struct glx_context *gc) +{ + struct dri3_drawable *priv = (struct dri3_drawable *) + GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable); + + if (priv == NULL || !priv->have_fake_front) + return; + + dri3_copy_drawable(priv, priv->base.xDrawable, dri3_fake_front_buffer(priv)->pixmap); +} + +/** + * Called by the driver when it needs to update the real front buffer with the + * contents of its fake front buffer. + */ +static void +dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate) +{ + struct glx_context *gc; + struct dri3_drawable *pdraw = loaderPrivate; + struct dri3_screen *psc; + + if (!pdraw) + return; + + if (!pdraw->base.psc) + return; + + psc = (struct dri3_screen *) pdraw->base.psc; + + (void) __glXInitialize(psc->base.dpy); + + gc = __glXGetCurrentContext(); + + dri3_flush(psc, pdraw, __DRI2_FLUSH_DRAWABLE, __DRI2_THROTTLE_FLUSHFRONT); + + dri3_wait_gl(gc); +} + +static uint32_t +dri3_cpp_for_format(uint32_t format) { + switch (format) { + case __DRI_IMAGE_FORMAT_R8: + return 1; + case __DRI_IMAGE_FORMAT_RGB565: + case __DRI_IMAGE_FORMAT_GR88: + return 2; + case __DRI_IMAGE_FORMAT_XRGB8888: + case __DRI_IMAGE_FORMAT_ARGB8888: + case __DRI_IMAGE_FORMAT_ABGR8888: + case __DRI_IMAGE_FORMAT_XBGR8888: + case __DRI_IMAGE_FORMAT_XRGB2101010: + case __DRI_IMAGE_FORMAT_ARGB2101010: + case __DRI_IMAGE_FORMAT_SARGB8: + return 4; + case __DRI_IMAGE_FORMAT_NONE: + default: + return 0; + } +} + + +/** dri3_alloc_render_buffer + * + * Use the driver createImage function to construct a __DRIimage, then + * get a file descriptor for that and create an X pixmap from that + * + * Allocate an xshmfence for synchronization + */ +static struct dri3_buffer * +dri3_alloc_render_buffer(struct glx_screen *glx_screen, Drawable draw, + unsigned int format, int width, int height, int depth) +{ + struct dri3_screen *psc = (struct dri3_screen *) glx_screen; + Display *dpy = glx_screen->dpy; + struct dri3_buffer *buffer; + xcb_connection_t *c = XGetXCBConnection(dpy); + xcb_pixmap_t pixmap; + xcb_sync_fence_t sync_fence; + int32_t *shm_fence; + int buffer_fd, fence_fd; + int stride; + + /* Create an xshmfence object and + * prepare to send that to the X server + */ + + fence_fd = xshmfence_alloc_shm(); + if (fence_fd < 0) + return NULL; + shm_fence = xshmfence_map_shm(fence_fd); + if (shm_fence == NULL) + goto no_shm_fence; + + /* Allocate the image from the driver + */ + buffer = calloc(1, sizeof (struct dri3_buffer)); + if (!buffer) + goto no_buffer; + + buffer->cpp = dri3_cpp_for_format(format); + if (!buffer->cpp) + goto no_image; + + buffer->image = (*psc->image->createImage) (psc->driScreen, + width, height, + format, + __DRI_IMAGE_USE_SHARE|__DRI_IMAGE_USE_SCANOUT, + buffer); + + + if (!buffer->image) + goto no_image; + + /* X wants the stride, so ask the image for it + */ + if (!(*psc->image->queryImage)(buffer->image, __DRI_IMAGE_ATTRIB_STRIDE, &stride)) + goto no_buffer_attrib; + + buffer->pitch = stride; + + if (!(*psc->image->queryImage)(buffer->image, __DRI_IMAGE_ATTRIB_FD, &buffer_fd)) + goto no_buffer_attrib; + + xcb_dri3_pixmap_from_buffer(c, + (pixmap = xcb_generate_id(c)), + draw, + buffer->size, + width, height, buffer->pitch, + depth, buffer->cpp * 8, + buffer_fd); + + xcb_dri3_fence_from_fd(c, + pixmap, + (sync_fence = xcb_generate_id(c)), + false, + fence_fd); + + buffer->pixmap = pixmap; + buffer->sync_fence = sync_fence; + buffer->shm_fence = shm_fence; + buffer->width = width; + buffer->height = height; + + /* Mark the buffer as idle + */ + dri3_fence_set(buffer); + + return buffer; + +no_buffer_attrib: + (*psc->image->destroyImage)(buffer->image); +no_image: + free(buffer); +no_buffer: + xshmfence_unmap_shm(shm_fence); +no_shm_fence: + close(fence_fd); + return NULL; +} + +/** dri3_free_render_buffer + * + * Free everything associated with one render buffer including pixmap, fence + * stuff and the driver image + */ +static void +dri3_free_render_buffer(struct dri3_drawable *pdraw, struct dri3_buffer *buffer) +{ + struct dri3_screen *psc = (struct dri3_screen *) pdraw->base.psc; + xcb_connection_t *c = XGetXCBConnection(pdraw->base.psc->dpy); + + xcb_free_pixmap(c, buffer->pixmap); + xcb_sync_destroy_fence(c, buffer->sync_fence); + xshmfence_unmap_shm(buffer->shm_fence); + (*psc->image->destroyImage)(buffer->image); + free(buffer); +} + + +/** dri3_flush_present_events + * + * Process any present events that have been received from the X server + */ +static void +dri3_flush_present_events(struct dri3_drawable *priv) +{ + xcb_connection_t *c = XGetXCBConnection(priv->base.psc->dpy); + + /* Check to see if any configuration changes have occurred + * since we were last invoked + */ + if (priv->special_event) { + xcb_generic_event_t *ev; + + while ((ev = xcb_poll_for_special_event(c, priv->special_event)) != NULL) { + xcb_present_generic_event_t *ge = (void *) ev; + dri3_handle_present_event(priv, ge); + } + } +} + +/** dri3_update_drawable + * + * Called the first time we use the drawable and then + * after we receive present configure notify events to + * track the geometry of the drawable + */ +static int +dri3_update_drawable(__DRIdrawable *driDrawable, void *loaderPrivate) +{ + struct dri3_drawable *priv = loaderPrivate; + xcb_connection_t *c = XGetXCBConnection(priv->base.psc->dpy); + + /* First time through, go get the current drawable geometry + */ + if (priv->width == 0 || priv->height == 0 || priv->depth == 0) { + xcb_get_geometry_cookie_t geom_cookie; + xcb_get_geometry_reply_t *geom_reply; + xcb_void_cookie_t cookie; + xcb_generic_error_t *error; + + /* Try to select for input on the window. + * + * If the drawable is a window, this will get our events + * delivered. + * + * Otherwise, we'll get a BadWindow error back from this request which + * will let us know that the drawable is a pixmap instead. + */ + + + cookie = xcb_present_select_input_checked(c, + (priv->eid = xcb_generate_id(c)), + priv->base.xDrawable, + XCB_PRESENT_EVENT_MASK_CONFIGURE_NOTIFY| + XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY| + XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY); + + /* Create an XCB event queue to hold present events outside of the usual + * application event queue + */ + priv->special_event = xcb_register_for_special_xge(c, + &xcb_present_id, + priv->eid, + priv->stamp); + + geom_cookie = xcb_get_geometry(c, priv->base.xDrawable); + + geom_reply = xcb_get_geometry_reply(c, geom_cookie, NULL); + + if (!geom_reply) + return false; + + priv->width = geom_reply->width; + priv->height = geom_reply->height; + priv->depth = geom_reply->depth; + priv->is_pixmap = false; + + free(geom_reply); + + /* Check to see if our select input call failed. If it failed with a + * BadWindow error, then assume the drawable is a pixmap. Destroy the + * special event queue created above and mark the drawable as a pixmap + */ + + error = xcb_request_check(c, cookie); + + if (error) { + if (error->error_code != BadWindow) { + free(error); + return false; + } + priv->is_pixmap = true; + xcb_unregister_for_special_event(c, priv->special_event); + priv->special_event = NULL; + } + } + dri3_flush_present_events(priv); + return true; +} + +/* the DRIimage createImage function takes __DRI_IMAGE_FORMAT codes, while + * the createImageFromFds call takes __DRI_IMAGE_FOURCC codes. To avoid + * complete confusion, just deal in __DRI_IMAGE_FORMAT codes for now and + * translate to __DRI_IMAGE_FOURCC codes in the call to createImageFromFds + */ +static int +image_format_to_fourcc(int format) +{ + + /* Convert from __DRI_IMAGE_FORMAT to __DRI_IMAGE_FOURCC (sigh) */ + switch (format) { + case __DRI_IMAGE_FORMAT_RGB565: return __DRI_IMAGE_FOURCC_RGB565; + case __DRI_IMAGE_FORMAT_XRGB8888: return __DRI_IMAGE_FOURCC_XRGB8888; + case __DRI_IMAGE_FORMAT_ARGB8888: return __DRI_IMAGE_FOURCC_ARGB8888; + case __DRI_IMAGE_FORMAT_ABGR8888: return __DRI_IMAGE_FOURCC_ABGR8888; + case __DRI_IMAGE_FORMAT_XBGR8888: return __DRI_IMAGE_FOURCC_XBGR8888; + } + return 0; +} + +/** dri3_get_pixmap_buffer + * + * Get the DRM object for a pixmap from the X server and + * wrap that with a __DRIimage structure using createImageFromFds + */ +static struct dri3_buffer * +dri3_get_pixmap_buffer(__DRIdrawable *driDrawable, + unsigned int format, + enum dri3_buffer_type buffer_type, + void *loaderPrivate) +{ + struct dri3_drawable *pdraw = loaderPrivate; + int buf_id = buffer_type == dri3_pixmap_buf_id(buffer_type); + struct dri3_buffer *buffer = pdraw->buffers[buf_id]; + Pixmap pixmap; + xcb_dri3_buffer_from_pixmap_cookie_t bp_cookie; + xcb_dri3_buffer_from_pixmap_reply_t *bp_reply; + int *fds; + Display *dpy; + struct dri3_screen *psc; + xcb_connection_t *c; + xcb_sync_fence_t sync_fence; + int32_t *shm_fence; + int fence_fd; + __DRIimage *image_planar; + int stride, offset; + + if (buffer) + return buffer; + + pixmap = pdraw->base.xDrawable; + psc = (struct dri3_screen *) pdraw->base.psc; + dpy = psc->base.dpy; + c = XGetXCBConnection(dpy); + + buffer = calloc(1, sizeof (struct dri3_buffer)); + if (!buffer) + goto no_buffer; + + fence_fd = xshmfence_alloc_shm(); + if (fence_fd < 0) + goto no_fence; + shm_fence = xshmfence_map_shm(fence_fd); + if (shm_fence == NULL) { + close (fence_fd); + goto no_fence; + } + + xcb_dri3_fence_from_fd(c, + pixmap, + (sync_fence = xcb_generate_id(c)), + false, + fence_fd); + + /* Get an FD for the pixmap object + */ + bp_cookie = xcb_dri3_buffer_from_pixmap(c, pixmap); + bp_reply = xcb_dri3_buffer_from_pixmap_reply(c, bp_cookie, NULL); + if (!bp_reply) + goto no_image; + fds = xcb_dri3_buffer_from_pixmap_reply_fds(c, bp_reply); + + stride = bp_reply->stride; + offset = 0; + + /* createImageFromFds creates a wrapper __DRIimage structure which + * can deal with multiple planes for things like Yuv images. So, once + * we've gotten the planar wrapper, pull the single plane out of it and + * discard the wrapper. + */ + image_planar = (*psc->image->createImageFromFds) (psc->driScreen, + bp_reply->width, + bp_reply->height, + image_format_to_fourcc(format), + fds, 1, + &stride, &offset, buffer); + close(fds[0]); + if (!image_planar) + goto no_image; + + buffer->image = (*psc->image->fromPlanar)(image_planar, 0, buffer); + + (*psc->image->destroyImage)(image_planar); + + if (!buffer->image) + goto no_image; + + buffer->pixmap = pixmap; + buffer->width = bp_reply->width; + buffer->height = bp_reply->height; + buffer->buffer_type = buffer_type; + buffer->shm_fence = shm_fence; + buffer->sync_fence = sync_fence; + + pdraw->buffers[buf_id] = buffer; + return buffer; + +no_image: + xcb_sync_destroy_fence(c, sync_fence); + xshmfence_unmap_shm(shm_fence); +no_fence: + free(buffer); +no_buffer: + return NULL; +} + +/** dri3_find_back + * + * Find an idle back buffer. If there isn't one, then + * wait for a present idle notify event from the X server + */ +static int +dri3_find_back(xcb_connection_t *c, struct dri3_drawable *priv) +{ + int b; + xcb_generic_event_t *ev; + xcb_present_generic_event_t *ge; + + for (;;) { + + for (b = 0; b < DRI3_MAX_BACK; b++) { + int id = DRI3_BACK_ID(b); + struct dri3_buffer *buffer = priv->buffers[id]; + + if (!buffer) + return b; + if (!buffer->busy) + return b; + } + ev = xcb_wait_for_special_event(c, priv->special_event); + if (!ev) + return -1; + ge = (void *) ev; + dri3_handle_present_event(priv, ge); + } +} + +/** dri3_get_buffer + * + * Find a front or back buffer, allocating new ones as necessary + */ +static struct dri3_buffer * +dri3_get_buffer(__DRIdrawable *driDrawable, + unsigned int format, + enum dri3_buffer_type buffer_type, + void *loaderPrivate) +{ + struct dri3_drawable *priv = loaderPrivate; + xcb_connection_t *c = XGetXCBConnection(priv->base.psc->dpy); + struct dri3_buffer *buffer; + int buf_id; + + if (buffer_type == dri3_buffer_back) { + int back = dri3_find_back(c, priv); + + if (back < 0) + return NULL; + + priv->cur_back = back; + buf_id = DRI3_BACK_ID(priv->cur_back); + } else { + buf_id = DRI3_FRONT_ID; + } + + buffer = priv->buffers[buf_id]; + + /* Allocate a new buffer if there isn't an old one, or if that + * old one is the wrong size + */ + if (!buffer || buffer->width != priv->width || buffer->height != priv->height) { + struct dri3_buffer *new_buffer; + + /* Allocate the new buffers + */ + new_buffer = dri3_alloc_render_buffer(priv->base.psc, + priv->base.xDrawable, + format, priv->width, priv->height, priv->depth); + if (!new_buffer) + return NULL; + + /* When resizing, copy the contents of the old buffer, waiting for that + * copy to complete using our fences before proceeding + */ + switch (buffer_type) { + case dri3_buffer_back: + if (buffer) { + dri3_fence_reset(c, new_buffer); + dri3_fence_await(c, buffer); + dri3_copy_area(c, + buffer->pixmap, + new_buffer->pixmap, + dri3_drawable_gc(priv), + 0, 0, 0, 0, priv->width, priv->height); + dri3_fence_trigger(c, new_buffer); + dri3_free_render_buffer(priv, buffer); + } + break; + case dri3_buffer_front: + dri3_fence_reset(c, new_buffer); + dri3_copy_area(c, + priv->base.xDrawable, + new_buffer->pixmap, + dri3_drawable_gc(priv), + 0, 0, 0, 0, priv->width, priv->height); + dri3_fence_trigger(c, new_buffer); + break; + } + buffer = new_buffer; + buffer->buffer_type = buffer_type; + priv->buffers[buf_id] = buffer; + } + dri3_fence_await(c, buffer); + + /* Return the requested buffer */ + return buffer; +} + +/** dri3_free_buffers + * + * Free the front bufffer or all of the back buffers. Used + * when the application changes which buffers it needs + */ +static void +dri3_free_buffers(__DRIdrawable *driDrawable, + enum dri3_buffer_type buffer_type, + void *loaderPrivate) +{ + struct dri3_drawable *priv = loaderPrivate; + struct dri3_buffer *buffer; + int first_id; + int n_id; + int buf_id; + + switch (buffer_type) { + case dri3_buffer_back: + first_id = DRI3_BACK_ID(0); + n_id = DRI3_MAX_BACK; + break; + case dri3_buffer_front: + first_id = DRI3_FRONT_ID; + n_id = 1; + } + + for (buf_id = first_id; buf_id < first_id + n_id; buf_id++) { + buffer = priv->buffers[buf_id]; + if (buffer) { + dri3_free_render_buffer(priv, buffer); + priv->buffers[buf_id] = NULL; + } + } +} + +/** dri3_get_buffers + * + * The published buffer allocation API. + * Returns all of the necessary buffers, allocating + * as needed. + */ +static int +dri3_get_buffers(__DRIdrawable *driDrawable, + unsigned int format, + uint32_t *stamp, + void *loaderPrivate, + uint32_t buffer_mask, + struct __DRIimageList *buffers) +{ + struct dri3_drawable *priv = loaderPrivate; + struct dri3_buffer *front, *back; + + buffers->image_mask = 0; + buffers->front = NULL; + buffers->back = NULL; + + front = NULL; + back = NULL; + + if (!dri3_update_drawable(driDrawable, loaderPrivate)) + return false; + + /* pixmaps always have front buffers */ + if (priv->is_pixmap) + buffer_mask |= __DRI_IMAGE_BUFFER_FRONT; + + if (buffer_mask & __DRI_IMAGE_BUFFER_FRONT) { + if (priv->is_pixmap) + front = dri3_get_pixmap_buffer(driDrawable, + format, + dri3_buffer_front, + loaderPrivate); + else + front = dri3_get_buffer(driDrawable, + format, + dri3_buffer_front, + loaderPrivate); + + if (!front) + return false; + } else { + dri3_free_buffers(driDrawable, dri3_buffer_front, loaderPrivate); + priv->have_fake_front = 0; + } + + if (buffer_mask & __DRI_IMAGE_BUFFER_BACK) { + back = dri3_get_buffer(driDrawable, + format, + dri3_buffer_back, + loaderPrivate); + if (!back) + return false; + priv->have_back = 1; + } else { + dri3_free_buffers(driDrawable, dri3_buffer_back, loaderPrivate); + priv->have_back = 0; + } + + if (front) { + buffers->image_mask |= __DRI_IMAGE_BUFFER_FRONT; + buffers->front = front->image; + priv->have_fake_front = !priv->is_pixmap; + } + + if (back) { + buffers->image_mask |= __DRI_IMAGE_BUFFER_BACK; + buffers->back = back->image; + } + + priv->stamp = stamp; + + return true; +} + +/* The image loader extension record for DRI3 + */ +static const __DRIimageLoaderExtension imageLoaderExtension = { + {__DRI_IMAGE_LOADER, __DRI_IMAGE_LOADER_VERSION}, + .getBuffers = dri3_get_buffers, + .flushFrontBuffer = dri3_flush_front_buffer, +}; + +/** dri3_swap_buffers + * + * Make the current back buffer visible using the present extension + */ +static int64_t +dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor, + int64_t remainder, Bool flush) +{ + struct dri3_drawable *priv = (struct dri3_drawable *) pdraw; + struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc; + Display *dpy = priv->base.psc->dpy; + xcb_connection_t *c = XGetXCBConnection(dpy); + int buf_id = DRI3_BACK_ID(priv->cur_back); + int64_t ret = 0; + + unsigned flags = __DRI2_FLUSH_DRAWABLE; + if (flush) + flags |= __DRI2_FLUSH_CONTEXT; + dri3_flush(psc, priv, flags, __DRI2_THROTTLE_SWAPBUFFER); + + dri3_flush_present_events(priv); + + if (priv->buffers[buf_id] && !priv->is_pixmap) { + dri3_fence_reset(c, priv->buffers[buf_id]); + + /* Compute when we want the frame shown by taking the last known successful + * MSC and adding in a swap interval for each outstanding swap request + */ + ++priv->present_request_serial; + if (target_msc == 0) + target_msc = priv->msc + priv->swap_interval * (priv->present_request_serial - priv->present_event_serial); + + priv->buffers[buf_id]->busy = 1; + xcb_present_pixmap(c, + priv->base.xDrawable, + priv->buffers[buf_id]->pixmap, + priv->present_request_serial, + 0, /* valid */ + 0, /* update */ + 0, /* x_off */ + 0, /* y_off */ + None, /* target_crtc */ + None, + priv->buffers[buf_id]->sync_fence, + XCB_PRESENT_OPTION_NONE, + target_msc, + divisor, + remainder, 0, NULL); + ret = ++priv->sbc; + + /* If there's a fake front, then copy the source back buffer + * to the fake front to keep it up to date. This needs + * to reset the fence and make future users block until + * the X server is done copying the bits + */ + if (priv->have_fake_front) { + dri3_fence_reset(c, priv->buffers[DRI3_FRONT_ID]); + dri3_copy_area(c, + priv->buffers[buf_id]->pixmap, + priv->buffers[DRI3_FRONT_ID]->pixmap, + dri3_drawable_gc(priv), + 0, 0, 0, 0, priv->width, priv->height); + dri3_fence_trigger(c, priv->buffers[DRI3_FRONT_ID]); + } + xcb_flush(c); + if (priv->stamp) + ++(*priv->stamp); + } + + return ret; +} + +/** dri3_open + * + * Wrapper around xcb_dri3_open + */ +static int +dri3_open(Display *dpy, + Window root, + CARD32 provider) +{ + xcb_dri3_open_cookie_t cookie; + xcb_dri3_open_reply_t *reply; + xcb_connection_t *c = XGetXCBConnection(dpy); + xcb_generic_error_t *error; + int fd; + + cookie = xcb_dri3_open(c, + root, + provider); + + reply = xcb_dri3_open_reply(c, cookie, &error); + if (!reply) + return -1; + + if (reply->nfd != 1) { + free(reply); + return -1; + } + + fd = xcb_dri3_open_reply_fds(c, reply)[0]; + fcntl(fd, F_SETFD, FD_CLOEXEC); + + return fd; +} + + +/** dri3_destroy_screen + */ +static void +dri3_destroy_screen(struct glx_screen *base) +{ + struct dri3_screen *psc = (struct dri3_screen *) base; + + /* Free the direct rendering per screen data */ + (*psc->core->destroyScreen) (psc->driScreen); + driDestroyConfigs(psc->driver_configs); + close(psc->fd); + free(psc); +} + +/** dri3_set_swap_interval + * + * Record the application swap interval specification, + */ +static int +dri3_set_swap_interval(__GLXDRIdrawable *pdraw, int interval) +{ + struct dri3_drawable *priv = (struct dri3_drawable *) pdraw; + GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1; + struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc; + + if (psc->config) + psc->config->configQueryi(psc->driScreen, + "vblank_mode", &vblank_mode); + + switch (vblank_mode) { + case DRI_CONF_VBLANK_NEVER: + if (interval != 0) + return GLX_BAD_VALUE; + break; + case DRI_CONF_VBLANK_ALWAYS_SYNC: + if (interval <= 0) + return GLX_BAD_VALUE; + break; + default: + break; + } + + priv->swap_interval = interval; + + return 0; +} + +/** dri3_get_swap_interval + * + * Return the stored swap interval + */ +static int +dri3_get_swap_interval(__GLXDRIdrawable *pdraw) +{ + struct dri3_drawable *priv = (struct dri3_drawable *) pdraw; + + return priv->swap_interval; +} + +static void +dri3_bind_tex_image(Display * dpy, + GLXDrawable drawable, + int buffer, const int *attrib_list) +{ + struct glx_context *gc = __glXGetCurrentContext(); + struct dri3_context *pcp = (struct dri3_context *) gc; + __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable); + struct dri3_drawable *pdraw = (struct dri3_drawable *) base; + struct dri3_screen *psc; + + if (pdraw != NULL) { + psc = (struct dri3_screen *) base->psc; + + (*psc->f->invalidate)(pdraw->driDrawable); + + XSync(dpy, false); + + (*psc->texBuffer->setTexBuffer2) (pcp->driContext, + pdraw->base.textureTarget, + pdraw->base.textureFormat, + pdraw->driDrawable); + } +} + +static void +dri3_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer) +{ + struct glx_context *gc = __glXGetCurrentContext(); + struct dri3_context *pcp = (struct dri3_context *) gc; + __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable); + struct dri3_drawable *pdraw = (struct dri3_drawable *) base; + struct dri3_screen *psc; + + if (pdraw != NULL) { + psc = (struct dri3_screen *) base->psc; + + if (psc->texBuffer->releaseTexBuffer) + (*psc->texBuffer->releaseTexBuffer) (pcp->driContext, + pdraw->base.textureTarget, + pdraw->driDrawable); + } +} + +static const struct glx_context_vtable dri3_context_vtable = { + dri3_destroy_context, + dri3_bind_context, + dri3_unbind_context, + dri3_wait_gl, + dri3_wait_x, + DRI_glXUseXFont, + dri3_bind_tex_image, + dri3_release_tex_image, + NULL, /* get_proc_address */ +}; + +/** dri3_bind_extensions + * + * Enable all of the extensions supported on DRI3 + */ +static void +dri3_bind_extensions(struct dri3_screen *psc, struct glx_display * priv, + const char *driverName) +{ + const __DRIextension **extensions; + unsigned mask; + int i; + + extensions = psc->core->getExtensions(psc->driScreen); + + __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync"); + __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control"); + __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control"); + __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read"); + + /* + * GLX_INTEL_swap_event is broken on the server side, where it's + * currently unconditionally enabled. This completely breaks + * systems running on drivers which don't support that extension. + * There's no way to test for its presence on this side, so instead + * of disabling it unconditionally, just disable it for drivers + * which are known to not support it, or for DDX drivers supporting + * only an older (pre-ScheduleSwap) version of DRI2. + * + * This is a hack which is required until: + * http://lists.x.org/archives/xorg-devel/2013-February/035449.html + * is merged and updated xserver makes it's way into distros: + */ +// if (pdp->swapAvailable && strcmp(driverName, "vmwgfx") != 0) { +// __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event"); +// } + + mask = psc->image_driver->getAPIMask(psc->driScreen); + + __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context"); + __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile"); + + if ((mask & (1 << __DRI_API_GLES2)) != 0) + __glXEnableDirectExtension(&psc->base, + "GLX_EXT_create_context_es2_profile"); + + for (i = 0; extensions[i]; i++) { + if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) { + psc->texBuffer = (__DRItexBufferExtension *) extensions[i]; + __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap"); + } + + if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) { + psc->f = (__DRI2flushExtension *) extensions[i]; + /* internal driver extension, no GL extension exposed */ + } + + if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0)) + psc->config = (__DRI2configQueryExtension *) extensions[i]; + + if (strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0) + __glXEnableDirectExtension(&psc->base, + "GLX_ARB_create_context_robustness"); + } +} + +static const struct glx_screen_vtable dri3_screen_vtable = { + dri3_create_context, + dri3_create_context_attribs +}; + +/** dri3_create_screen + * + * Initialize DRI3 on the specified screen. + * + * Opens the DRI device, locates the appropriate DRI driver + * and loads that. + * + * Checks to see if the driver supports the necessary extensions + * + * Initializes the driver for the screen and sets up our structures + */ + +static struct glx_screen * +dri3_create_screen(int screen, struct glx_display * priv) +{ + const __DRIconfig **driver_configs; + const __DRIextension **extensions; + const struct dri3_display *const pdp = (struct dri3_display *) + priv->dri3Display; + struct dri3_screen *psc; + __GLXDRIscreen *psp; + struct glx_config *configs = NULL, *visuals = NULL; + char *driverName, *deviceName; + int i; + + psc = calloc(1, sizeof *psc); + if (psc == NULL) + return NULL; + + psc->fd = -1; + + if (!glx_screen_init(&psc->base, screen, priv)) { + free(psc); + return NULL; + } + + psc->fd = dri3_open(priv->dpy, RootWindow(priv->dpy, screen), None); + if (psc->fd < 0) { + glx_screen_cleanup(&psc->base); + free(psc); + InfoMessageF("screen %d does not appear to be DRI3 capable\n", screen); + return NULL; + } + deviceName = NULL; + + driverName = dri3_get_driver_for_fd(psc->fd); + if (!driverName) { + ErrorMessageF("No driver found\n"); + goto handle_error; + } + + psc->driver = driOpenDriver(driverName); + if (psc->driver == NULL) { + ErrorMessageF("driver pointer missing\n"); + goto handle_error; + } + + extensions = driGetDriverExtensions(psc->driver, driverName); + if (extensions == NULL) + goto handle_error; + + for (i = 0; extensions[i]; i++) { + if (strcmp(extensions[i]->name, __DRI_CORE) == 0) + psc->core = (__DRIcoreExtension *) extensions[i]; + if (strcmp(extensions[i]->name, __DRI_IMAGE_DRIVER) == 0) + psc->image_driver = (__DRIimageDriverExtension *) extensions[i]; + } + + + if (psc->core == NULL) { + ErrorMessageF("core dri driver extension not found\n"); + goto handle_error; + } + + if (psc->image_driver == NULL) { + ErrorMessageF("image driver extension not found\n"); + goto handle_error; + } + + psc->driScreen = + psc->image_driver->createNewScreen2(screen, psc->fd, + (const __DRIextension **) + &pdp->loader_extensions[0], + extensions, + &driver_configs, psc); + + if (psc->driScreen == NULL) { + ErrorMessageF("failed to create dri screen\n"); + goto handle_error; + } + + extensions = (*psc->core->getExtensions)(psc->driScreen); + + for (i = 0; extensions[i]; i++) { + if (strcmp(extensions[i]->name, __DRI_IMAGE) == 0) + psc->image = (__DRIimageExtension *) extensions[i]; + } + + if (psc->image == NULL) { + ErrorMessageF("image extension not found\n"); + goto handle_error; + } + + dri3_bind_extensions(psc, priv, driverName); + + if (!psc->f || psc->f->base.version < 4) { + ErrorMessageF("Version 4 or later of flush extension not found\n"); + goto handle_error; + } + + if (!psc->texBuffer || psc->texBuffer->base.version < 2 || + !psc->texBuffer->setTexBuffer2) + { + ErrorMessageF("Version 2 or later of texBuffer extension not found\n"); + goto handle_error; + } + + configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs); + visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs); + + if (!configs || !visuals) + goto handle_error; + + glx_config_destroy_list(psc->base.configs); + psc->base.configs = configs; + glx_config_destroy_list(psc->base.visuals); + psc->base.visuals = visuals; + + psc->driver_configs = driver_configs; + + psc->base.vtable = &dri3_screen_vtable; + psp = &psc->vtable; + psc->base.driScreen = psp; + psp->destroyScreen = dri3_destroy_screen; + psp->createDrawable = dri3_create_drawable; + psp->swapBuffers = dri3_swap_buffers; + + psp->getDrawableMSC = dri3_drawable_get_msc; + psp->waitForMSC = dri3_wait_for_msc; + psp->waitForSBC = dri3_wait_for_sbc; + psp->setSwapInterval = dri3_set_swap_interval; + psp->getSwapInterval = dri3_get_swap_interval; + __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control"); + + psp->copySubBuffer = dri3_copy_sub_buffer; + __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer"); + + free(driverName); + free(deviceName); + + return &psc->base; + +handle_error: + CriticalErrorMessageF("failed to load driver: %s\n", driverName); + + if (configs) + glx_config_destroy_list(configs); + if (visuals) + glx_config_destroy_list(visuals); + if (psc->driScreen) + psc->core->destroyScreen(psc->driScreen); + psc->driScreen = NULL; + if (psc->fd >= 0) + close(psc->fd); + if (psc->driver) + dlclose(psc->driver); + + free(driverName); + free(deviceName); + glx_screen_cleanup(&psc->base); + free(psc); + + return NULL; +} + +/** dri_destroy_display + * + * Called from __glXFreeDisplayPrivate. + */ +static void +dri3_destroy_display(__GLXDRIdisplay * dpy) +{ + free(dpy); +} + +/** dri3_create_display + * + * Allocate, initialize and return a __DRIdisplayPrivate object. + * This is called from __glXInitialize() when we are given a new + * display pointer. This is public to that function, but hidden from + * outside of libGL. + */ +_X_HIDDEN __GLXDRIdisplay * +dri3_create_display(Display * dpy) +{ + struct dri3_display *pdp; + int i; + xcb_connection_t *c = XGetXCBConnection(dpy); + xcb_dri3_query_version_cookie_t dri3_cookie; + xcb_dri3_query_version_reply_t *dri3_reply; + xcb_present_query_version_cookie_t present_cookie; + xcb_present_query_version_reply_t *present_reply; + xcb_generic_error_t *error; + const xcb_query_extension_reply_t *extension; + + xcb_prefetch_extension_data(c, &xcb_dri3_id); + xcb_prefetch_extension_data(c, &xcb_present_id); + + extension = xcb_get_extension_data(c, &xcb_dri3_id); + if (!(extension && extension->present)) + return NULL; + + extension = xcb_get_extension_data(c, &xcb_present_id); + if (!(extension && extension->present)) + return NULL; + + dri3_cookie = xcb_dri3_query_version(c, + XCB_DRI3_MAJOR_VERSION, + XCB_DRI3_MINOR_VERSION); + + + present_cookie = xcb_present_query_version(c, + XCB_PRESENT_MAJOR_VERSION, + XCB_PRESENT_MINOR_VERSION); + + pdp = malloc(sizeof *pdp); + if (pdp == NULL) + return NULL; + + dri3_reply = xcb_dri3_query_version_reply(c, dri3_cookie, &error); + if (!dri3_reply) { + free(error); + goto no_extension; + } + + pdp->dri3Major = dri3_reply->major_version; + pdp->dri3Minor = dri3_reply->minor_version; + free(dri3_reply); + + present_reply = xcb_present_query_version_reply(c, present_cookie, &error); + if (!present_reply) { + free(error); + goto no_extension; + } + pdp->presentMajor = present_reply->major_version; + pdp->presentMinor = present_reply->minor_version; + + pdp->base.destroyDisplay = dri3_destroy_display; + pdp->base.createScreen = dri3_create_screen; + + i = 0; + + pdp->loader_extensions[i++] = &imageLoaderExtension.base; + + pdp->loader_extensions[i++] = &systemTimeExtension.base; + + pdp->loader_extensions[i++] = NULL; + + return &pdp->base; +no_extension: + free(pdp); + return NULL; +} + +#endif /* GLX_DIRECT_RENDERING */ |