---
src/glx/dri2_glx.c | 1 +
src/glx/dri3_glx.c | 18 ++++++++++++++++++
src/glx/dri3_priv.h | 2 ++
src/glx/glx_pbuffer.c | 8 ++++++++
src/glx/glxclient.h | 1 +
src/glx/glxextensions.c | 1 +
src/glx/glxextensions.h | 1 +
7 files changed, 32 insertions(+)
diff --git a/src/glx/dri2_glx.c b/src/glx/dri2_glx.c
index 67fe9c1..146802a 100644
--- a/src/glx/dri2_glx.c
+++ b/src/glx/dri2_glx.c
@@ -1288,6 +1288,7 @@ dri2CreateScreen(int screen, struct glx_display * priv)
psp->waitForSBC = NULL;
psp->setSwapInterval = NULL;
psp->getSwapInterval = NULL;
+ psp->getBufferAge = NULL;
if (pdp->driMinor >= 2) {
psp->getDrawableMSC = dri2DrawableGetMSC;
diff --git a/src/glx/dri3_glx.c b/src/glx/dri3_glx.c
index 70ec057..697d448 100644
--- a/src/glx/dri3_glx.c
+++ b/src/glx/dri3_glx.c
@@ -1345,6 +1345,7 @@ dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t
target_msc, int64_t divisor,
target_msc = priv->msc + priv->swap_interval * (priv->send_sbc -
priv->recv_sbc);
priv->buffers[buf_id]->busy = 1;
+ priv->buffers[buf_id]->last_swap = priv->swap_count;
xcb_present_pixmap(c,
priv->base.xDrawable,
priv->buffers[buf_id]->pixmap,
@@ -1379,11 +1380,25 @@ dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t
target_msc, int64_t divisor,
xcb_flush(c);
if (priv->stamp)
++(*priv->stamp);
+
+ priv->swap_count++;
}
return ret;
}
+static int
+dri3_get_buffer_age(__GLXDRIdrawable *pdraw)
+{
+ struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
+ const struct dri3_buffer *const back = dri3_back_buffer(priv);
+
+ if (back->last_swap != 0)
+ return priv->swap_count - back->last_swap;
+ else
+ return 0;
+}
+
/** dri3_open
*
* Wrapper around xcb_dri3_open
@@ -1742,6 +1757,9 @@ dri3_create_screen(int screen, struct glx_display * priv)
psp->copySubBuffer = dri3_copy_sub_buffer;
__glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
+ psp->getBufferAge = dri3_get_buffer_age;
+ __glXEnableDirectExtension(&psc->base, "GLX_EXT_buffer_age");
+
free(driverName);
free(deviceName);
diff --git a/src/glx/dri3_priv.h b/src/glx/dri3_priv.h
index 1d124f8..d00440a 100644
--- a/src/glx/dri3_priv.h
+++ b/src/glx/dri3_priv.h
@@ -97,6 +97,7 @@ struct dri3_buffer {
uint32_t cpp;
uint32_t flags;
uint32_t width, height;
+ uint32_t last_swap;
enum dri3_buffer_type buffer_type;
};
@@ -184,6 +185,7 @@ struct dri3_drawable {
struct dri3_buffer *buffers[DRI3_NUM_BUFFERS];
int cur_back;
int num_back;
+ uint32_t swap_count;
uint32_t *stamp;
diff --git a/src/glx/glx_pbuffer.c b/src/glx/glx_pbuffer.c
index 978730c..afb4206 100644
--- a/src/glx/glx_pbuffer.c
+++ b/src/glx/glx_pbuffer.c
@@ -373,6 +373,14 @@ GetDrawableAttribute(Display * dpy, GLXDrawable drawable,
if (!pdraw->textureFormat)
pdraw->textureFormat =
determineTextureFormat((const int *) data, num_attributes);
+
+ if (attribute == GLX_BACK_BUFFER_AGE_EXT) {
+ struct glx_screen *psc = pdraw->psc;
+
+ if (psc->driScreen->getBufferAge != NULL)
+ *value = psc->driScreen->getBufferAge(pdraw);
+ }
+
}
#endif
diff --git a/src/glx/glxclient.h b/src/glx/glxclient.h
index a7118af..74c19c4 100644
--- a/src/glx/glxclient.h
+++ b/src/glx/glxclient.h
@@ -125,6 +125,7 @@ struct __GLXDRIscreenRec {
int64_t *msc, int64_t *sbc);
int (*setSwapInterval)(__GLXDRIdrawable *pdraw, int interval);
int (*getSwapInterval)(__GLXDRIdrawable *pdraw);
+ int (*getBufferAge)(__GLXDRIdrawable *pdraw);
};
struct __GLXDRIdrawableRec
diff --git a/src/glx/glxextensions.c b/src/glx/glxextensions.c
index f186c13..ac1b4a7 100644
--- a/src/glx/glxextensions.c
+++ b/src/glx/glxextensions.c
@@ -103,6 +103,7 @@ static const struct extension_info known_glx_extensions[] =
{
{ GLX(SGIX_visual_select_group), VER(0,0), Y, Y, N, N },
{ GLX(EXT_texture_from_pixmap), VER(0,0), Y, N, N, N },
{ GLX(INTEL_swap_event), VER(0,0), Y, N, N, N },
+ { GLX(EXT_buffer_age), VER(0,0), Y, N, Y, Y },
{ NULL }
};
diff --git a/src/glx/glxextensions.h b/src/glx/glxextensions.h
index 8436a94..37e4ccc 100644
--- a/src/glx/glxextensions.h
+++ b/src/glx/glxextensions.h
@@ -66,6 +66,7 @@ enum
SGIX_visual_select_group_bit,
EXT_texture_from_pixmap_bit,
INTEL_swap_event_bit,
+ EXT_buffer_age_bit,
};
/* From the GLX perspective, the ARB and EXT extensions are identical. Use a
--
1.8.5.3
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