1 /**************************************************************************
3 * Copyright 2007 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
28 #include "main/imports.h"
29 #include "main/image.h"
30 #include "main/macros.h"
34 #include "st_context.h"
36 #include "st_cb_bufferobjects.h"
38 #include "st_program.h"
40 #include "pipe/p_context.h"
41 #include "pipe/p_defines.h"
42 #include "util/u_inlines.h"
43 #include "util/u_draw.h"
45 #include "draw/draw_private.h"
46 #include "draw/draw_context.h"
50 * Set the (private) draw module's post-transformed vertex format when in
51 * GL_SELECT or GL_FEEDBACK mode or for glRasterPos.
54 set_feedback_vertex_format(struct gl_context
*ctx
)
57 struct st_context
*st
= st_context(ctx
);
58 struct vertex_info vinfo
;
61 memset(&vinfo
, 0, sizeof(vinfo
));
63 if (ctx
->RenderMode
== GL_SELECT
) {
64 assert(ctx
->RenderMode
== GL_SELECT
);
65 vinfo
.num_attribs
= 1;
66 vinfo
.format
[0] = FORMAT_4F
;
67 vinfo
.interp_mode
[0] = INTERP_LINEAR
;
70 /* GL_FEEDBACK, or glRasterPos */
71 /* emit all attribs (pos, color, texcoord) as GLfloat[4] */
72 vinfo
.num_attribs
= st
->state
.vs
->cso
->state
.num_outputs
;
73 for (i
= 0; i
< vinfo
.num_attribs
; i
++) {
74 vinfo
.format
[i
] = FORMAT_4F
;
75 vinfo
.interp_mode
[i
] = INTERP_LINEAR
;
79 draw_set_vertex_info(st
->draw
, &vinfo
);
85 * Helper for drawing current vertex arrays.
88 draw_arrays(struct draw_context
*draw
, unsigned mode
,
89 unsigned start
, unsigned count
)
91 struct pipe_draw_info info
;
93 util_draw_init_info(&info
);
98 info
.min_index
= start
;
99 info
.max_index
= start
+ count
- 1;
101 draw_vbo(draw
, &info
);
106 * Called by VBO to draw arrays when in selection or feedback mode and
107 * to implement glRasterPos.
108 * This is very much like the normal draw_vbo() function above.
109 * Look at code refactoring some day.
112 st_feedback_draw_vbo(struct gl_context
*ctx
,
113 const struct _mesa_prim
*prims
,
115 const struct _mesa_index_buffer
*ib
,
116 GLboolean index_bounds_valid
,
119 struct gl_transform_feedback_object
*tfb_vertcount
,
121 struct gl_buffer_object
*indirect
)
123 struct st_context
*st
= st_context(ctx
);
124 struct pipe_context
*pipe
= st
->pipe
;
125 struct draw_context
*draw
= st
->draw
;
126 const struct st_vertex_program
*vp
;
127 const struct pipe_shader_state
*vs
;
128 struct pipe_vertex_buffer vbuffers
[PIPE_MAX_SHADER_INPUTS
];
129 struct pipe_vertex_element velements
[PIPE_MAX_ATTRIBS
];
130 struct pipe_index_buffer ibuffer
;
131 struct pipe_transfer
*vb_transfer
[PIPE_MAX_ATTRIBS
] = {NULL
};
132 struct pipe_transfer
*ib_transfer
= NULL
;
133 const struct gl_client_array
**arrays
= ctx
->Array
._DrawArrays
;
135 const GLubyte
*low_addr
= NULL
;
136 const void *mapped_indices
= NULL
;
140 st_validate_state(st
);
142 if (!index_bounds_valid
)
143 vbo_get_minmax_indices(ctx
, prims
, ib
, &min_index
, &max_index
, nr_prims
);
145 /* must get these after state validation! */
147 vs
= &st
->vp_variant
->tgsi
;
149 if (!st
->vp_variant
->draw_shader
) {
150 st
->vp_variant
->draw_shader
= draw_create_vertex_shader(draw
, vs
);
154 * Set up the draw module's state.
156 * We'd like to do this less frequently, but the normal state-update
157 * code sends state updates to the pipe, not to our private draw module.
160 draw_set_viewport_states(draw
, 0, 1, &st
->state
.viewport
[0]);
161 draw_set_clip_state(draw
, &st
->state
.clip
);
162 draw_set_rasterizer_state(draw
, &st
->state
.rasterizer
, NULL
);
163 draw_bind_vertex_shader(draw
, st
->vp_variant
->draw_shader
);
164 set_feedback_vertex_format(ctx
);
166 /* Find the lowest address of the arrays we're drawing */
167 if (vp
->num_inputs
) {
168 low_addr
= arrays
[vp
->index_to_input
[0]]->Ptr
;
170 for (attr
= 1; attr
< vp
->num_inputs
; attr
++) {
171 const GLubyte
*start
= arrays
[vp
->index_to_input
[attr
]]->Ptr
;
172 low_addr
= MIN2(low_addr
, start
);
176 /* loop over TGSI shader inputs to determine vertex buffer
179 for (attr
= 0; attr
< vp
->num_inputs
; attr
++) {
180 const GLuint mesaAttr
= vp
->index_to_input
[attr
];
181 struct gl_buffer_object
*bufobj
= arrays
[mesaAttr
]->BufferObj
;
184 if (bufobj
&& bufobj
->Name
) {
185 /* Attribute data is in a VBO.
186 * Recall that for VBOs, the gl_client_array->Ptr field is
187 * really an offset from the start of the VBO, not a pointer.
189 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
190 assert(stobj
->buffer
);
192 vbuffers
[attr
].buffer
= NULL
;
193 vbuffers
[attr
].user_buffer
= NULL
;
194 pipe_resource_reference(&vbuffers
[attr
].buffer
, stobj
->buffer
);
195 vbuffers
[attr
].buffer_offset
= pointer_to_offset(low_addr
);
196 velements
[attr
].src_offset
= arrays
[mesaAttr
]->Ptr
- low_addr
;
198 /* map the attrib buffer */
199 map
= pipe_buffer_map(pipe
, vbuffers
[attr
].buffer
,
202 draw_set_mapped_vertex_buffer(draw
, attr
, map
,
203 vbuffers
[attr
].buffer
->width0
);
206 vbuffers
[attr
].buffer
= NULL
;
207 vbuffers
[attr
].user_buffer
= arrays
[mesaAttr
]->Ptr
;
208 vbuffers
[attr
].buffer_offset
= 0;
209 velements
[attr
].src_offset
= 0;
211 draw_set_mapped_vertex_buffer(draw
, attr
, vbuffers
[attr
].user_buffer
,
215 /* common-case setup */
216 vbuffers
[attr
].stride
= arrays
[mesaAttr
]->StrideB
; /* in bytes */
217 velements
[attr
].instance_divisor
= 0;
218 velements
[attr
].vertex_buffer_index
= attr
;
219 velements
[attr
].src_format
=
220 st_pipe_vertex_format(arrays
[mesaAttr
]->Type
,
221 arrays
[mesaAttr
]->Size
,
222 arrays
[mesaAttr
]->Format
,
223 arrays
[mesaAttr
]->Normalized
,
224 arrays
[mesaAttr
]->Integer
);
225 assert(velements
[attr
].src_format
);
227 /* tell draw about this attribute */
229 draw_set_vertex_buffer(draw
, attr
, &vbuffer
[attr
]);
233 draw_set_vertex_buffers(draw
, 0, vp
->num_inputs
, vbuffers
);
234 draw_set_vertex_elements(draw
, vp
->num_inputs
, velements
);
236 memset(&ibuffer
, 0, sizeof(ibuffer
));
238 struct gl_buffer_object
*bufobj
= ib
->obj
;
240 ibuffer
.index_size
= vbo_sizeof_ib_type(ib
->type
);
241 if (ibuffer
.index_size
== 0)
242 goto out_unref_vertex
;
244 if (bufobj
&& bufobj
->Name
) {
245 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
247 pipe_resource_reference(&ibuffer
.buffer
, stobj
->buffer
);
248 ibuffer
.offset
= pointer_to_offset(ib
->ptr
);
250 mapped_indices
= pipe_buffer_map(pipe
, stobj
->buffer
,
251 PIPE_TRANSFER_READ
, &ib_transfer
);
254 /* skip setting ibuffer.buffer as the draw module does not use it */
255 mapped_indices
= ib
->ptr
;
258 draw_set_indexes(draw
,
259 (ubyte
*) mapped_indices
+ ibuffer
.offset
,
260 ibuffer
.index_size
, ~0);
263 /* set the constant buffer */
264 draw_set_mapped_constant_buffer(st
->draw
, PIPE_SHADER_VERTEX
, 0,
265 st
->state
.constants
[PIPE_SHADER_VERTEX
].ptr
,
266 st
->state
.constants
[PIPE_SHADER_VERTEX
].size
);
270 for (i
= 0; i
< nr_prims
; i
++) {
271 draw_arrays(draw
, prims
[i
].mode
, prims
[i
].start
, prims
[i
].count
);
276 * unmap vertex/index buffers
279 draw_set_indexes(draw
, NULL
, 0, 0);
281 pipe_buffer_unmap(pipe
, ib_transfer
);
282 pipe_resource_reference(&ibuffer
.buffer
, NULL
);
286 for (attr
= 0; attr
< vp
->num_inputs
; attr
++) {
287 if (vb_transfer
[attr
])
288 pipe_buffer_unmap(pipe
, vb_transfer
[attr
]);
289 draw_set_mapped_vertex_buffer(draw
, attr
, NULL
, 0);
290 pipe_resource_reference(&vbuffers
[attr
].buffer
, NULL
);
292 draw_set_vertex_buffers(draw
, 0, vp
->num_inputs
, NULL
);