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svga: Temporarily create a sw vertex buf when failed to create a hw buf.

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Many apps don't check the return of map buffer so it is better not to
fail.
This commit is contained in:
José Fonseca 2010-02-18 18:11:50 +00:00
parent 21480fb9e4
commit 6390dbb373
1 changed files with 20 additions and 7 deletions
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27
src/gallium/drivers/svga/svga_screen_buffer.c
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@ -410,18 +410,31 @@ svga_buffer_map_range( struct pipe_screen *screen,
struct svga_buffer *sbuf = svga_buffer( buf );
void *map;
if(sbuf->swbuf) {
if (!sbuf->swbuf && !sbuf->hw.buf) {
if (svga_buffer_create_hw_storage(ss, sbuf) != PIPE_OK) {
/*
* We can't create a hardware buffer big enough, so create a malloc
* buffer instead.
*/
debug_printf("%s: failed to allocate %u KB of DMA, splitting DMA transfers\n",
__FUNCTION__,
(sbuf->base.size + 1023)/1024);
sbuf->swbuf = align_malloc(sbuf->base.size, sbuf->base.alignment);
}
}
if (sbuf->swbuf) {
/* User/malloc buffer */
map = sbuf->swbuf;
}
else {
if(!sbuf->hw.buf) {
if(svga_buffer_create_hw_storage(ss, sbuf) != PIPE_OK)
return NULL;
}
else if (sbuf->hw.buf) {
map = sws->buffer_map(sws, sbuf->hw.buf, usage);
}
else {
map = NULL;
}
if(map) {
pipe_mutex_lock(ss->swc_mutex);