if(screen->buffer_map_range) {
unsigned offset = 0;
unsigned length = buf->size;
-
- /* XXX: Actually we should be using/detecting DISCARD
- * instead of assuming that WRITE implies discard */
- if((usage & PIPE_BUFFER_USAGE_CPU_WRITE) &&
- !(usage & PIPE_BUFFER_USAGE_DISCARD))
- usage |= PIPE_BUFFER_USAGE_CPU_READ;
-
return screen->buffer_map_range(screen, buf, offset, length, usage);
}
else
map = pipe_buffer_map_range(screen, buf, offset, size,
PIPE_BUFFER_USAGE_CPU_WRITE |
- PIPE_BUFFER_USAGE_FLUSH_EXPLICIT);
+ PIPE_BUFFER_USAGE_FLUSH_EXPLICIT |
+ PIPE_BUFFER_USAGE_DISCARD);
+ assert(map);
+ if(map) {
+ memcpy((uint8_t *)map + offset, data, size);
+ pipe_buffer_flush_mapped_range(screen, buf, offset, size);
+ pipe_buffer_unmap(screen, buf);
+ }
+}
+
+/**
+ * Special case for writing non-overlapping ranges.
+ *
+ * We can avoid GPU/CPU synchronization when writing range that has never
+ * been written before.
+ */
+static INLINE void
+pipe_buffer_write_nooverlap(struct pipe_screen *screen,
+ struct pipe_buffer *buf,
+ unsigned offset, unsigned size,
+ const void *data)
+{
+ void *map;
+
+ assert(offset < buf->size);
+ assert(offset + size <= buf->size);
+ assert(size);
+
+ map = pipe_buffer_map_range(screen, buf, offset, size,
+ PIPE_BUFFER_USAGE_CPU_WRITE |
+ PIPE_BUFFER_USAGE_FLUSH_EXPLICIT |
+ PIPE_BUFFER_USAGE_DISCARD |
+ PIPE_BUFFER_USAGE_UNSYNCHRONIZED);
assert(map);
if(map) {
memcpy((uint8_t *)map + offset, data, size);
screen->tex_transfer_destroy(transf);
}
+static INLINE unsigned
+pipe_transfer_buffer_flags( struct pipe_transfer *transf )
+{
+ switch (transf->usage & PIPE_TRANSFER_READ_WRITE) {
+ case PIPE_TRANSFER_READ_WRITE:
+ return PIPE_BUFFER_USAGE_CPU_READ | PIPE_BUFFER_USAGE_CPU_WRITE;
+ case PIPE_TRANSFER_READ:
+ return PIPE_BUFFER_USAGE_CPU_READ;
+ case PIPE_TRANSFER_WRITE:
+ return PIPE_BUFFER_USAGE_CPU_WRITE;
+ default:
+ debug_assert(0);
+ return 0;
+ }
+}
+
#ifdef __cplusplus
}
#endif