2 * Copyright (C) 2013 Rob Clark <robclark@freedesktop.org>
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * Rob Clark <robclark@freedesktop.org>
28 * This module converts provides a more convenient front-end to u_indices,
29 * etc, utils to convert primitive types supported not supported by the
30 * hardware. It handles binding new index buffer state, and restoring
31 * previous state after. To use, put something like this at the front of
32 * drivers pipe->draw_vbo():
34 * // emulate unsupported primitives:
35 * if (info->mode needs emulating) {
36 * util_primconvert_save_rasterizer_state(ctx->primconvert, ctx->rasterizer);
37 * util_primconvert_draw_vbo(ctx->primconvert, info);
43 #include "pipe/p_state.h"
44 #include "util/u_draw.h"
45 #include "util/u_inlines.h"
46 #include "util/u_memory.h"
47 #include "util/u_upload_mgr.h"
49 #include "indices/u_indices.h"
50 #include "indices/u_primconvert.h"
52 struct primconvert_context
54 struct pipe_context
*pipe
;
55 struct primconvert_config cfg
;
60 struct primconvert_context
*
61 util_primconvert_create_config(struct pipe_context
*pipe
,
62 struct primconvert_config
*cfg
)
64 struct primconvert_context
*pc
= CALLOC_STRUCT(primconvert_context
);
72 struct primconvert_context
*
73 util_primconvert_create(struct pipe_context
*pipe
, uint32_t primtypes_mask
)
75 struct primconvert_config cfg
= { .primtypes_mask
= primtypes_mask
};
76 return util_primconvert_create_config(pipe
, &cfg
);
80 util_primconvert_destroy(struct primconvert_context
*pc
)
86 util_primconvert_save_rasterizer_state(struct primconvert_context
*pc
,
87 const struct pipe_rasterizer_state
90 /* if we actually translated the provoking vertex for the buffer,
91 * we would actually need to save/restore rasterizer state. As
92 * it is, we just need to make note of the pv.
94 pc
->api_pv
= rast
->flatshade_first
? PV_FIRST
: PV_LAST
;
98 util_primconvert_draw_vbo(struct primconvert_context
*pc
,
99 const struct pipe_draw_info
*info
)
101 struct pipe_draw_info new_info
;
102 struct pipe_transfer
*src_transfer
= NULL
;
103 u_translate_func trans_func
;
104 u_generate_func gen_func
;
105 const void *src
= NULL
;
109 util_draw_init_info(&new_info
);
110 new_info
.min_index
= info
->min_index
;
111 new_info
.max_index
= info
->max_index
;
112 new_info
.index_bias
= info
->index_bias
;
113 new_info
.start_instance
= info
->start_instance
;
114 new_info
.instance_count
= info
->instance_count
;
115 new_info
.primitive_restart
= info
->primitive_restart
;
116 new_info
.restart_index
= info
->restart_index
;
117 if (info
->index_size
) {
118 enum pipe_prim_type mode
= 0;
121 u_index_translator(pc
->cfg
.primtypes_mask
,
122 info
->mode
, info
->index_size
, info
->count
,
123 pc
->api_pv
, pc
->api_pv
,
124 info
->primitive_restart
? PR_ENABLE
: PR_DISABLE
,
125 &mode
, &index_size
, &new_info
.count
,
127 new_info
.mode
= mode
;
128 new_info
.index_size
= index_size
;
129 src
= info
->has_user_indices
? info
->index
.user
: NULL
;
131 src
= pipe_buffer_map(pc
->pipe
, info
->index
.resource
,
132 PIPE_TRANSFER_READ
, &src_transfer
);
134 src
= (const uint8_t *)src
;
137 enum pipe_prim_type mode
= 0;
140 u_index_generator(pc
->cfg
.primtypes_mask
,
141 info
->mode
, info
->start
, info
->count
,
142 pc
->api_pv
, pc
->api_pv
,
143 &mode
, &index_size
, &new_info
.count
,
145 new_info
.mode
= mode
;
146 new_info
.index_size
= index_size
;
149 u_upload_alloc(pc
->pipe
->stream_uploader
, 0, new_info
.index_size
* new_info
.count
, 4,
150 &ib_offset
, &new_info
.index
.resource
, &dst
);
151 new_info
.start
= ib_offset
/ new_info
.index_size
;
153 if (info
->index_size
) {
154 trans_func(src
, info
->start
, info
->count
, new_info
.count
, info
->restart_index
, dst
);
157 gen_func(info
->start
, new_info
.count
, dst
);
161 pipe_buffer_unmap(pc
->pipe
, src_transfer
);
163 u_upload_unmap(pc
->pipe
->stream_uploader
);
165 /* to the translated draw: */
166 pc
->pipe
->draw_vbo(pc
->pipe
, &new_info
);
168 pipe_resource_reference(&new_info
.index
.resource
, NULL
);