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glamor: Fallback to system memory for RW PBO buffer allocation 

We currently support two modes of operation for RW PBO buffers: one
that allocates a pack buffer with GL memory and one that uses system
memory when the former is not supported.

Since allocation with system memory is less likely to fail, add a
fallback to system memory when GL memory failed instead of bailing
out.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
This commit is contained in:
Paul Kocialkowski 2019-03-04 11:52:43 +01:00
parent de6b3fac1f
commit 8c4e8d9eff
1 changed files with 6 additions and 5 deletions
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11
glamor/glamor_prepare.c
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@ -107,9 +107,10 @@ glamor_prep_pixmap_box(PixmapPtr pixmap, glamor_access_t access, BoxPtr box)
glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
glDeleteBuffers(1, &priv->pbo);
priv->pbo = 0;
return FALSE;
}
} else {
}
if (!priv->pbo) {
pixmap->devPrivate.ptr = xallocarray(pixmap->devKind,
pixmap->drawable.height);
if (!pixmap->devPrivate.ptr)
@ -123,7 +124,7 @@ glamor_prep_pixmap_box(PixmapPtr pixmap, glamor_access_t access, BoxPtr box)
RegionUninit(&region);
if (glamor_priv->has_rw_pbo) {
if (priv->pbo) {
if (priv->map_access == GLAMOR_ACCESS_RW)
gl_access = GL_READ_WRITE;
else
@ -155,7 +156,7 @@ glamor_fini_pixmap(PixmapPtr pixmap)
if (!priv->prepared)
return;
if (glamor_priv->has_rw_pbo) {
if (priv->pbo) {
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, priv->pbo);
glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER);
pixmap->devPrivate.ptr = NULL;
@ -170,7 +171,7 @@ glamor_fini_pixmap(PixmapPtr pixmap)
RegionUninit(&priv->prepare_region);
if (glamor_priv->has_rw_pbo) {
if (priv->pbo) {
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
glDeleteBuffers(1, &priv->pbo);
priv->pbo = 0;