xserver-multidpi/glamor/glamor_prepare.c
Paul Kocialkowski bc2e12239f glamor: Error out on out-of-memory when allocating PBO for FBO access
Packed buffer allocation (which happens at glBufferData time with the
buffer bound) can fail when there is no GL memory left.

Pick up the error when it happens, print a proper error message, do
some cleanup and bail.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
2019-03-08 14:29:40 +01:00

305 lines
9.6 KiB
C

/*
* Copyright © 2014 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.
*/
#include "glamor_priv.h"
#include "glamor_prepare.h"
#include "glamor_transfer.h"
/*
* Make a pixmap ready to draw with fb by
* creating a PBO large enough for the whole object
* and downloading all of the FBOs into it.
*/
static Bool
glamor_prep_pixmap_box(PixmapPtr pixmap, glamor_access_t access, BoxPtr box)
{
ScreenPtr screen = pixmap->drawable.pScreen;
glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
glamor_pixmap_private *priv = glamor_get_pixmap_private(pixmap);
int gl_access, gl_usage;
RegionRec region;
if (priv->type == GLAMOR_DRM_ONLY)
return FALSE;
if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(priv))
return TRUE;
glamor_make_current(glamor_priv);
RegionInit(&region, box, 1);
/* See if it's already mapped */
if (pixmap->devPrivate.ptr) {
/*
* Someone else has mapped this pixmap;
* we'll assume that it's directly mapped
* by a lower level driver
*/
if (!priv->prepared)
return TRUE;
/* In X, multiple Drawables can be stored in the same Pixmap (such as
* each individual window in a non-composited screen pixmap, or the
* reparented window contents inside the window-manager-decorated window
* pixmap on a composited screen).
*
* As a result, when doing a series of mappings for a fallback, we may
* need to add more boxes to the set of data we've downloaded, as we go.
*/
RegionSubtract(&region, &region, &priv->prepare_region);
if (!RegionNotEmpty(&region))
return TRUE;
if (access == GLAMOR_ACCESS_RW)
FatalError("attempt to remap buffer as writable");
if (priv->pbo) {
glBindBuffer(GL_PIXEL_PACK_BUFFER, priv->pbo);
glUnmapBuffer(GL_PIXEL_PACK_BUFFER);
pixmap->devPrivate.ptr = NULL;
}
} else {
RegionInit(&priv->prepare_region, box, 1);
if (glamor_priv->has_rw_pbo) {
if (priv->pbo == 0)
glGenBuffers(1, &priv->pbo);
gl_usage = GL_STREAM_READ;
glamor_priv->suppress_gl_out_of_memory_logging = true;
glBindBuffer(GL_PIXEL_PACK_BUFFER, priv->pbo);
glBufferData(GL_PIXEL_PACK_BUFFER,
pixmap->devKind * pixmap->drawable.height, NULL,
gl_usage);
glamor_priv->suppress_gl_out_of_memory_logging = false;
if (glGetError() == GL_OUT_OF_MEMORY) {
if (!glamor_priv->logged_any_pbo_allocation_failure) {
LogMessageVerb(X_WARNING, 0, "glamor: Failed to allocate %d "
"bytes PBO due to GL_OUT_OF_MEMORY.\n",
pixmap->devKind * pixmap->drawable.height);
glamor_priv->logged_any_pbo_allocation_failure = true;
}
glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
glDeleteBuffers(1, &priv->pbo);
priv->pbo = 0;
return FALSE;
}
} else {
pixmap->devPrivate.ptr = xallocarray(pixmap->devKind,
pixmap->drawable.height);
if (!pixmap->devPrivate.ptr)
return FALSE;
}
priv->map_access = access;
}
glamor_download_boxes(pixmap, RegionRects(&region), RegionNumRects(&region),
0, 0, 0, 0, pixmap->devPrivate.ptr, pixmap->devKind);
RegionUninit(&region);
if (glamor_priv->has_rw_pbo) {
if (priv->map_access == GLAMOR_ACCESS_RW)
gl_access = GL_READ_WRITE;
else
gl_access = GL_READ_ONLY;
pixmap->devPrivate.ptr = glMapBuffer(GL_PIXEL_PACK_BUFFER, gl_access);
glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
}
priv->prepared = TRUE;
return TRUE;
}
/*
* When we're done with the drawable, unmap the PBO, reupload
* if we were writing to it and then unbind it to release the memory
*/
static void
glamor_fini_pixmap(PixmapPtr pixmap)
{
ScreenPtr screen = pixmap->drawable.pScreen;
glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
glamor_pixmap_private *priv = glamor_get_pixmap_private(pixmap);
if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(priv))
return;
if (!priv->prepared)
return;
if (glamor_priv->has_rw_pbo) {
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, priv->pbo);
glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER);
pixmap->devPrivate.ptr = NULL;
}
if (priv->map_access == GLAMOR_ACCESS_RW) {
glamor_upload_boxes(pixmap,
RegionRects(&priv->prepare_region),
RegionNumRects(&priv->prepare_region),
0, 0, 0, 0, pixmap->devPrivate.ptr, pixmap->devKind);
}
RegionUninit(&priv->prepare_region);
if (glamor_priv->has_rw_pbo) {
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
glDeleteBuffers(1, &priv->pbo);
priv->pbo = 0;
} else {
free(pixmap->devPrivate.ptr);
pixmap->devPrivate.ptr = NULL;
}
priv->prepared = FALSE;
}
Bool
glamor_prepare_access(DrawablePtr drawable, glamor_access_t access)
{
PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
BoxRec box;
int off_x, off_y;
glamor_get_drawable_deltas(drawable, pixmap, &off_x, &off_y);
box.x1 = drawable->x + off_x;
box.x2 = box.x1 + drawable->width;
box.y1 = drawable->y + off_y;
box.y2 = box.y1 + drawable->height;
return glamor_prep_pixmap_box(pixmap, access, &box);
}
Bool
glamor_prepare_access_box(DrawablePtr drawable, glamor_access_t access,
int x, int y, int w, int h)
{
PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
BoxRec box;
int off_x, off_y;
glamor_get_drawable_deltas(drawable, pixmap, &off_x, &off_y);
box.x1 = drawable->x + x + off_x;
box.x2 = box.x1 + w;
box.y1 = drawable->y + y + off_y;
box.y2 = box.y1 + h;
return glamor_prep_pixmap_box(pixmap, access, &box);
}
void
glamor_finish_access(DrawablePtr drawable)
{
glamor_fini_pixmap(glamor_get_drawable_pixmap(drawable));
}
/*
* Make a picture ready to use with fb.
*/
Bool
glamor_prepare_access_picture(PicturePtr picture, glamor_access_t access)
{
if (!picture || !picture->pDrawable)
return TRUE;
return glamor_prepare_access(picture->pDrawable, access);
}
Bool
glamor_prepare_access_picture_box(PicturePtr picture, glamor_access_t access,
int x, int y, int w, int h)
{
if (!picture || !picture->pDrawable)
return TRUE;
/* If a transform is set, we don't know what the bounds is on the
* source, so just prepare the whole pixmap. XXX: We could
* potentially work out where in the source would be sampled based
* on the transform, and we don't need do do this for destination
* pixmaps at all.
*/
if (picture->transform) {
return glamor_prepare_access_box(picture->pDrawable, access,
0, 0,
picture->pDrawable->width,
picture->pDrawable->height);
} else {
return glamor_prepare_access_box(picture->pDrawable, access,
x, y, w, h);
}
}
void
glamor_finish_access_picture(PicturePtr picture)
{
if (!picture || !picture->pDrawable)
return;
glamor_finish_access(picture->pDrawable);
}
/*
* Make a GC ready to use with fb. This just
* means making sure the appropriate fill pixmap is
* in CPU memory again
*/
Bool
glamor_prepare_access_gc(GCPtr gc)
{
switch (gc->fillStyle) {
case FillTiled:
return glamor_prepare_access(&gc->tile.pixmap->drawable,
GLAMOR_ACCESS_RO);
case FillStippled:
case FillOpaqueStippled:
return glamor_prepare_access(&gc->stipple->drawable, GLAMOR_ACCESS_RO);
}
return TRUE;
}
/*
* Free any temporary CPU pixmaps for the GC
*/
void
glamor_finish_access_gc(GCPtr gc)
{
switch (gc->fillStyle) {
case FillTiled:
glamor_finish_access(&gc->tile.pixmap->drawable);
break;
case FillStippled:
case FillOpaqueStippled:
glamor_finish_access(&gc->stipple->drawable);
break;
}
}