1 /************************************************************************** 2 * 3 * Copyright 2010 Luca Barbieri 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining 6 * a copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sublicense, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the 14 * next paragraph) shall be included in all copies or substantial 15 * portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE 21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 24 * 25 **************************************************************************/ 26 27 /* Direct3D 10/11 has no concept of transfers. Applications instead 28 * create resources with a STAGING or DYNAMIC usage, copy between them 29 * and the real resource and use Map to map the STAGING/DYNAMIC resource. 30 * 31 * This util module allows to implement Gallium drivers as a Direct3D 32 * driver would be implemented: transfers allocate a resource with 33 * PIPE_USAGE_STAGING, and copy the data between it and the real resource 34 * with resource_copy_region. 35 */ 36 37 #ifndef U_STAGING_H 38 #define U_STAGING_H 39 40 #include "pipe/p_state.h" 41 42 struct util_staging_transfer { 43 struct pipe_transfer base; 44 45 /* if direct, same as base.resource, otherwise the temporary staging resource */ 46 struct pipe_resource *staging_resource; 47 }; 48 49 /* user must be stride, slice_stride and offset */ 50 /* pt->usage == PIPE_USAGE_DYNAMIC || pt->usage == PIPE_USAGE_STAGING should be a good value to pass for direct */ 51 /* staging resource is currently created with PIPE_USAGE_STAGING */ 52 struct util_staging_transfer * 53 util_staging_transfer_init(struct pipe_context *pipe, 54 struct pipe_resource *pt, 55 unsigned level, 56 unsigned usage, 57 const struct pipe_box *box, 58 boolean direct, struct util_staging_transfer *tx); 59 60 void 61 util_staging_transfer_destroy(struct pipe_context *pipe, struct pipe_transfer *ptx); 62 63 #endif 64
