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third_party_mesa3d/src/glx/dri2_glx.c

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/*
* 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 (krh@redhat.com)
*/
#if defined(GLX_DIRECT_RENDERING) && (!defined(GLX_USE_APPLEGL) || defined(GLX_USE_APPLE))
#include <X11/Xlib.h>
#include <X11/extensions/Xfixes.h>
#include <X11/Xlib-xcb.h>
#include <xcb/xcb.h>
#include <xcb/dri2.h>
#include "glxclient.h"
#include <X11/extensions/dri2proto.h>
#include <dlfcn.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/time.h>
#include "dri2.h"
#include "dri_common.h"
#include "dri2_priv.h"
#include "loader.h"
#include "loader_dri_helper.h"
#include "dri_util.h"
#undef DRI2_MINOR
#define DRI2_MINOR 1
struct dri2_drawable
{
__GLXDRIdrawable base;
__DRIbuffer buffers[5];
int bufferCount;
int width, height;
int have_back;
int have_fake_front;
int swap_interval;
uint64_t previous_time;
unsigned frames;
};
static const struct glx_context_vtable dri2_context_vtable;
/* For XCB's handling of ust/msc/sbc counters, we have to hand it the high and
* low halves separately. This helps you split them.
*/
static void
split_counter(uint64_t counter, uint32_t *hi, uint32_t *lo)
{
*hi = (counter >> 32);
*lo = counter & 0xffffffff;
}
static uint64_t
merge_counter(uint32_t hi, uint32_t lo)
{
return ((uint64_t)hi << 32) | lo;
}
static void
dri2DestroyDrawable(__GLXDRIdrawable *base)
{
struct dri2_screen *psc = (struct dri2_screen *) base->psc;
struct glx_display *dpyPriv = psc->base.display;
__glxHashDelete(dpyPriv->dri2Hash, base->xDrawable);
driDestroyDrawable(base->dri_drawable);
/* If it's a GLX 1.3 drawables, we can destroy the DRI2 drawable
* now, as the application explicitly asked to destroy the GLX
* drawable. Otherwise, for legacy drawables, we let the DRI2
* drawable linger on the server, since there's no good way of
* knowing when the application is done with it. The server will
* destroy the DRI2 drawable when it destroys the X drawable or the
* client exits anyway. */
if (base->xDrawable != base->drawable)
DRI2DestroyDrawable(psc->base.dpy, base->xDrawable);
free(base);
}
static __GLXDRIdrawable *
dri2CreateDrawable(struct glx_screen *base, XID xDrawable,
GLXDrawable drawable, int type,
struct glx_config *config_base)
{
struct dri2_drawable *pdraw;
struct dri2_screen *psc = (struct dri2_screen *) base;
__GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
struct glx_display *dpyPriv;
dpyPriv = __glXInitialize(psc->base.dpy);
if (dpyPriv == NULL)
return NULL;
pdraw = calloc(1, sizeof(*pdraw));
if (!pdraw)
return NULL;
pdraw->base.destroyDrawable = dri2DestroyDrawable;
pdraw->base.xDrawable = xDrawable;
pdraw->base.drawable = drawable;
pdraw->base.psc = &psc->base;
pdraw->bufferCount = 0;
pdraw->swap_interval = dri_get_initial_swap_interval(psc->base.frontend_screen);
pdraw->have_back = 0;
DRI2CreateDrawable(psc->base.dpy, xDrawable);
/* Create a new drawable */
pdraw->base.dri_drawable =
dri_create_drawable(psc->base.frontend_screen, config->driConfig, false, pdraw);
if (!pdraw->base.dri_drawable) {
DRI2DestroyDrawable(psc->base.dpy, xDrawable);
free(pdraw);
return NULL;
}
if (__glxHashInsert(dpyPriv->dri2Hash, xDrawable, pdraw)) {
driDestroyDrawable(pdraw->base.dri_drawable);
DRI2DestroyDrawable(psc->base.dpy, xDrawable);
free(pdraw);
return None;
}
/*
* Make sure server has the same swap interval we do for the new
* drawable.
*/
if (base->driScreen.setSwapInterval)
base->driScreen.setSwapInterval(&pdraw->base, pdraw->swap_interval);
return &pdraw->base;
}
static int
dri2DrawableGetMSC(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
int64_t *ust, int64_t *msc, int64_t *sbc)
{
xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
xcb_dri2_get_msc_cookie_t get_msc_cookie;
xcb_dri2_get_msc_reply_t *get_msc_reply;
get_msc_cookie = xcb_dri2_get_msc_unchecked(c, pdraw->xDrawable);
get_msc_reply = xcb_dri2_get_msc_reply(c, get_msc_cookie, NULL);
if (!get_msc_reply)
return 0;
*ust = merge_counter(get_msc_reply->ust_hi, get_msc_reply->ust_lo);
*msc = merge_counter(get_msc_reply->msc_hi, get_msc_reply->msc_lo);
*sbc = merge_counter(get_msc_reply->sbc_hi, get_msc_reply->sbc_lo);
free(get_msc_reply);
return 1;
}
static int
dri2WaitForMSC(__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);
xcb_dri2_wait_msc_cookie_t wait_msc_cookie;
xcb_dri2_wait_msc_reply_t *wait_msc_reply;
uint32_t target_msc_hi, target_msc_lo;
uint32_t divisor_hi, divisor_lo;
uint32_t remainder_hi, remainder_lo;
split_counter(target_msc, &target_msc_hi, &target_msc_lo);
split_counter(divisor, &divisor_hi, &divisor_lo);
split_counter(remainder, &remainder_hi, &remainder_lo);
wait_msc_cookie = xcb_dri2_wait_msc_unchecked(c, pdraw->xDrawable,
target_msc_hi, target_msc_lo,
divisor_hi, divisor_lo,
remainder_hi, remainder_lo);
wait_msc_reply = xcb_dri2_wait_msc_reply(c, wait_msc_cookie, NULL);
if (!wait_msc_reply)
return 0;
*ust = merge_counter(wait_msc_reply->ust_hi, wait_msc_reply->ust_lo);
*msc = merge_counter(wait_msc_reply->msc_hi, wait_msc_reply->msc_lo);
*sbc = merge_counter(wait_msc_reply->sbc_hi, wait_msc_reply->sbc_lo);
free(wait_msc_reply);
return 1;
}
static int
dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
int64_t *msc, int64_t *sbc)
{
xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
xcb_dri2_wait_sbc_cookie_t wait_sbc_cookie;
xcb_dri2_wait_sbc_reply_t *wait_sbc_reply;
uint32_t target_sbc_hi, target_sbc_lo;
split_counter(target_sbc, &target_sbc_hi, &target_sbc_lo);
wait_sbc_cookie = xcb_dri2_wait_sbc_unchecked(c, pdraw->xDrawable,
target_sbc_hi, target_sbc_lo);
wait_sbc_reply = xcb_dri2_wait_sbc_reply(c, wait_sbc_cookie, NULL);
if (!wait_sbc_reply)
return 0;
*ust = merge_counter(wait_sbc_reply->ust_hi, wait_sbc_reply->ust_lo);
*msc = merge_counter(wait_sbc_reply->msc_hi, wait_sbc_reply->msc_lo);
*sbc = merge_counter(wait_sbc_reply->sbc_hi, wait_sbc_reply->sbc_lo);
free(wait_sbc_reply);
return 1;
}
static struct dri_context *
dri2GetCurrentContext()
{
struct glx_context *gc = __glXGetCurrentContext();
return (gc != &dummyContext) ? gc->driContext : NULL;
}
/**
* dri2Throttle - Request driver throttling
*
* This function uses the DRI2 throttle extension to give the
* driver the opportunity to throttle on flush front, copysubbuffer
* and swapbuffers.
*/
static void
dri2Throttle(struct dri2_screen *psc,
struct dri2_drawable *draw,
enum __DRI2throttleReason reason)
{
struct dri_context *ctx = dri2GetCurrentContext();
dri_throttle(ctx, draw->base.dri_drawable, reason);
}
/**
* 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
dri2Flush(struct dri2_screen *psc,
struct dri_context *ctx,
struct dri2_drawable *draw,
unsigned flags,
enum __DRI2throttleReason throttle_reason)
{
if (ctx) {
dri_flush(ctx, draw->base.dri_drawable, flags, throttle_reason);
} else {
if (flags & __DRI2_FLUSH_CONTEXT)
glFlush();
dri_flush_drawable(draw->base.dri_drawable);
dri2Throttle(psc, draw, throttle_reason);
}
}
static void
__dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
int width, int height,
enum __DRI2throttleReason reason, Bool flush)
{
struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
XRectangle xrect;
XserverRegion region;
struct dri_context *ctx = dri2GetCurrentContext();
unsigned flags;
/* Check we have the right attachments */
if (!priv->have_back)
return;
xrect.x = x;
xrect.y = priv->height - y - height;
xrect.width = width;
xrect.height = height;
flags = __DRI2_FLUSH_DRAWABLE;
if (flush)
flags |= __DRI2_FLUSH_CONTEXT;
dri2Flush(psc, ctx, priv, flags, __DRI2_THROTTLE_COPYSUBBUFFER);
region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
DRI2BufferFrontLeft, DRI2BufferBackLeft);
/* Refresh the fake front (if present) after we just damaged the real
* front.
*/
if (priv->have_fake_front)
DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
XFixesDestroyRegion(psc->base.dpy, region);
}
static void
dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
int width, int height, Bool flush)
{
__dri2CopySubBuffer(pdraw, x, y, width, height,
__DRI2_THROTTLE_COPYSUBBUFFER, flush);
}
static void
dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
{
XRectangle xrect;
XserverRegion region;
struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
xrect.x = 0;
xrect.y = 0;
xrect.width = priv->width;
xrect.height = priv->height;
dri_flush_drawable(priv->base.dri_drawable);
region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
XFixesDestroyRegion(psc->base.dpy, region);
}
static void
dri2_wait_x(struct glx_context *gc)
{
struct dri2_drawable *priv = (struct dri2_drawable *)
GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
if (priv == NULL || !priv->have_fake_front)
return;
dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
}
static void
dri2_wait_gl(struct glx_context *gc)
{
struct dri2_drawable *priv = (struct dri2_drawable *)
GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
if (priv == NULL || !priv->have_fake_front)
return;
dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
}
/**
* Called by the driver when it needs to update the real front buffer with the
* contents of its fake front buffer.
*/
static void
dri2FlushFrontBuffer(struct dri_drawable *driDrawable, void *loaderPrivate)
{
struct glx_display *priv;
struct glx_context *gc;
struct dri2_drawable *pdraw = loaderPrivate;
struct dri2_screen *psc;
if (!pdraw)
return;
if (!pdraw->base.psc)
return;
psc = (struct dri2_screen *) pdraw->base.psc;
priv = __glXInitialize(psc->base.dpy);
if (priv == NULL)
return;
gc = __glXGetCurrentContext();
dri2Throttle(psc, pdraw, __DRI2_THROTTLE_FLUSHFRONT);
dri2_wait_gl(gc);
}
static void
dri2DeinitScreen(struct glx_screen *base)
{
struct dri2_screen *psc = (struct dri2_screen *) base;
close(psc->fd);
}
/**
* Process list of buffer received from the server
*
* Processes the list of buffers received in a reply from the server to either
* \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
*/
static void
process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
unsigned count)
{
int i;
pdraw->bufferCount = count;
pdraw->have_fake_front = 0;
pdraw->have_back = 0;
/* This assumes the DRI2 buffer attachment tokens matches the
* __DRIbuffer tokens. */
for (i = 0; i < count; i++) {
pdraw->buffers[i].attachment = buffers[i].attachment;
pdraw->buffers[i].name = buffers[i].name;
pdraw->buffers[i].pitch = buffers[i].pitch;
pdraw->buffers[i].cpp = buffers[i].cpp;
pdraw->buffers[i].flags = buffers[i].flags;
if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
pdraw->have_fake_front = 1;
if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
pdraw->have_back = 1;
}
}
unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
{
struct glx_display *glx_dpy = __glXInitialize(dpy);
__GLXDRIdrawable *pdraw;
pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
return 0;
return glx_dpy->codes.first_event + GLX_BufferSwapComplete;
}
static int64_t
dri2XcbSwapBuffers(Display *dpy,
__GLXDRIdrawable *pdraw,
int64_t target_msc,
int64_t divisor,
int64_t remainder)
{
xcb_dri2_swap_buffers_cookie_t swap_buffers_cookie;
xcb_dri2_swap_buffers_reply_t *swap_buffers_reply;
uint32_t target_msc_hi, target_msc_lo;
uint32_t divisor_hi, divisor_lo;
uint32_t remainder_hi, remainder_lo;
int64_t ret = 0;
xcb_connection_t *c = XGetXCBConnection(dpy);
split_counter(target_msc, &target_msc_hi, &target_msc_lo);
split_counter(divisor, &divisor_hi, &divisor_lo);
split_counter(remainder, &remainder_hi, &remainder_lo);
swap_buffers_cookie =
xcb_dri2_swap_buffers_unchecked(c, pdraw->xDrawable,
target_msc_hi, target_msc_lo,
divisor_hi, divisor_lo,
remainder_hi, remainder_lo);
/* Immediately wait on the swapbuffers reply. If we didn't, we'd have
* to do so some time before reusing a (non-pageflipped) backbuffer.
* Otherwise, the new rendering could get ahead of the X Server's
* dispatch of the swapbuffer and you'd display garbage.
*
* We use XSync() first to reap the invalidate events through the event
* filter, to ensure that the next drawing doesn't use an invalidated
* buffer.
*/
XSync(dpy, False);
swap_buffers_reply =
xcb_dri2_swap_buffers_reply(c, swap_buffers_cookie, NULL);
if (swap_buffers_reply) {
ret = merge_counter(swap_buffers_reply->swap_hi,
swap_buffers_reply->swap_lo);
free(swap_buffers_reply);
}
return ret;
}
static int64_t
dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
int64_t remainder, Bool flush)
{
struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
int64_t ret = 0;
/* Check we have the right attachments */
if (!priv->have_back)
return ret;
struct dri_context *ctx = dri2GetCurrentContext();
unsigned flags = __DRI2_FLUSH_DRAWABLE;
if (flush)
flags |= __DRI2_FLUSH_CONTEXT;
dri2Flush(psc, ctx, priv, flags, __DRI2_THROTTLE_SWAPBUFFER);
ret = dri2XcbSwapBuffers(pdraw->psc->dpy, pdraw,
target_msc, divisor, remainder);
return ret;
}
static __DRIbuffer *
dri2GetBuffers(struct dri_drawable * driDrawable,
int *width, int *height,
unsigned int *attachments, int count,
int *out_count, void *loaderPrivate)
{
struct dri2_drawable *pdraw = loaderPrivate;
DRI2Buffer *buffers;
buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
width, height, attachments, count, out_count);
if (buffers == NULL)
return NULL;
pdraw->width = *width;
pdraw->height = *height;
process_buffers(pdraw, buffers, *out_count);
free(buffers);
return pdraw->buffers;
}
static __DRIbuffer *
dri2GetBuffersWithFormat(struct dri_drawable * driDrawable,
int *width, int *height,
unsigned int *attachments, int count,
int *out_count, void *loaderPrivate)
{
struct dri2_drawable *pdraw = loaderPrivate;
DRI2Buffer *buffers;
buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
pdraw->base.xDrawable,
width, height, attachments,
count, out_count);
if (buffers == NULL)
return NULL;
pdraw->width = *width;
pdraw->height = *height;
process_buffers(pdraw, buffers, *out_count);
free(buffers);
return pdraw->buffers;
}
static int
dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
{
xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
if (!dri_valid_swap_interval(psc->base.frontend_screen, interval))
return GLX_BAD_VALUE;
xcb_dri2_swap_interval(c, priv->base.xDrawable, interval);
priv->swap_interval = interval;
return 0;
}
static int
dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
{
struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
return priv->swap_interval;
}
static const __DRIdri2LoaderExtension dri2LoaderExtension = {
.base = { __DRI_DRI2_LOADER, 3 },
.getBuffers = dri2GetBuffers,
.flushFrontBuffer = dri2FlushFrontBuffer,
.getBuffersWithFormat = dri2GetBuffersWithFormat,
};
_X_HIDDEN void
dri2InvalidateBuffers(Display *dpy, XID drawable)
{
__GLXDRIdrawable *pdraw =
dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
if (!pdraw)
return;
dri_invalidate_drawable(pdraw->dri_drawable);
}
static const struct glx_context_vtable dri2_context_vtable = {
.destroy = dri_destroy_context,
.bind = dri_bind_context,
.unbind = dri_unbind_context,
.wait_gl = dri2_wait_gl,
.wait_x = dri2_wait_x,
};
static const __DRIextension *loader_extensions[] = {
&dri2LoaderExtension.base,
&dri2UseInvalidate.base,
&driBackgroundCallable.base,
NULL
};
struct glx_screen *
dri2CreateScreen(int screen, struct glx_display * priv, bool driver_name_is_inferred)
{
struct dri2_screen *psc;
__GLXDRIscreen *psp;
char *driverName = NULL, *loader_driverName, *deviceName, *tmp;
drm_magic_t magic;
psc = calloc(1, sizeof *psc);
if (psc == NULL)
return NULL;
psc->fd = -1;
if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
&driverName, &deviceName)) {
glx_screen_cleanup(&psc->base);
free(psc);
InfoMessageF("screen %d does not appear to be DRI2 capable\n", screen);
return NULL;
}
psc->fd = loader_open_device(deviceName);
if (psc->fd < 0) {
ErrorMessageF("failed to open %s: %s\n", deviceName, strerror(errno));
goto handle_error;
}
if (drmGetMagic(psc->fd, &magic)) {
ErrorMessageF("failed to get magic\n");
goto handle_error;
}
if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
ErrorMessageF("failed to authenticate magic %d\n", magic);
goto handle_error;
}
/* If Mesa knows about the appropriate driver for this fd, then trust it.
* Otherwise, default to the server's value.
*/
loader_driverName = loader_get_driver_for_fd(psc->fd);
if (loader_driverName) {
free(driverName);
driverName = loader_driverName;
}
psc->base.driverName = driverName;
priv->driver = GLX_DRIVER_DRI2;
if (!dri_screen_init(&psc->base, priv, screen, psc->fd, loader_extensions, driver_name_is_inferred)) {
ErrorMessageF("glx: failed to create dri2 screen\n");
goto handle_error;
}
psc->base.context_vtable = &dri2_context_vtable;
psp = &psc->base.driScreen;
psp->deinitScreen = dri2DeinitScreen;
psp->createDrawable = dri2CreateDrawable;
psp->swapBuffers = dri2SwapBuffers;
psp->getDrawableMSC = NULL;
psp->waitForMSC = NULL;
psp->waitForSBC = NULL;
psp->setSwapInterval = NULL;
psp->getSwapInterval = NULL;
psp->getDrawableMSC = dri2DrawableGetMSC;
psp->waitForMSC = dri2WaitForMSC;
psp->waitForSBC = dri2WaitForSBC;
psp->setSwapInterval = dri2SetSwapInterval;
psp->getSwapInterval = dri2GetSwapInterval;
psp->maxSwapInterval = INT_MAX;
psc->base.can_EXT_texture_from_pixmap = true;
/* DRI2 supports SubBuffer through DRI2CopyRegion, so it's always
* available.*/
psp->copySubBuffer = dri2CopySubBuffer;
free(deviceName);
tmp = getenv("LIBGL_SHOW_FPS");
psc->show_fps_interval = (tmp) ? atoi(tmp) : 0;
if (psc->show_fps_interval < 0)
psc->show_fps_interval = 0;
InfoMessageF("Using DRI2 for screen %d\n", screen);
return &psc->base;
handle_error:
CriticalErrorMessageF("failed to load driver: %s\n", driverName);
if (psc->fd >= 0)
close(psc->fd);
free(deviceName);
glx_screen_cleanup(&psc->base);
free(psc);
return NULL;
}
_X_HIDDEN __GLXDRIdrawable *
dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
{
struct glx_display *d = __glXInitialize(dpy);
__GLXDRIdrawable *pdraw;
if (__glxHashLookup(d->dri2Hash, id, (void *) &pdraw) == 0)
return pdraw;
return NULL;
}
bool
dri2CheckSupport(Display *dpy)
{
int eventBase, errorBase;
int driMajor, driMinor;
if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
return false;
if (!DRI2QueryVersion(dpy, &driMajor, &driMinor) ||
driMinor < 3) {
return false;
}
return true;
}
#endif /* GLX_DIRECT_RENDERING */
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