1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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"
31 #include "main/mfeatures.h"
35 #include "st_context.h"
37 #include "st_cb_bufferobjects.h"
39 #include "st_program.h"
41 #include "pipe/p_context.h"
42 #include "pipe/p_defines.h"
43 #include "util/u_inlines.h"
45 #include "draw/draw_private.h"
46 #include "draw/draw_context.h"
49 #if FEATURE_feedback || FEATURE_rastpos
52 * Set the (private) draw module's post-transformed vertex format when in
53 * GL_SELECT or GL_FEEDBACK mode or for glRasterPos.
56 set_feedback_vertex_format(struct gl_context
*ctx
)
59 struct st_context
*st
= st_context(ctx
);
60 struct vertex_info vinfo
;
63 memset(&vinfo
, 0, sizeof(vinfo
));
65 if (ctx
->RenderMode
== GL_SELECT
) {
66 assert(ctx
->RenderMode
== GL_SELECT
);
67 vinfo
.num_attribs
= 1;
68 vinfo
.format
[0] = FORMAT_4F
;
69 vinfo
.interp_mode
[0] = INTERP_LINEAR
;
72 /* GL_FEEDBACK, or glRasterPos */
73 /* emit all attribs (pos, color, texcoord) as GLfloat[4] */
74 vinfo
.num_attribs
= st
->state
.vs
->cso
->state
.num_outputs
;
75 for (i
= 0; i
< vinfo
.num_attribs
; i
++) {
76 vinfo
.format
[i
] = FORMAT_4F
;
77 vinfo
.interp_mode
[i
] = INTERP_LINEAR
;
81 draw_set_vertex_info(st
->draw
, &vinfo
);
87 * Called by VBO to draw arrays when in selection or feedback mode and
88 * to implement glRasterPos.
89 * This is very much like the normal draw_vbo() function above.
90 * Look at code refactoring some day.
93 st_feedback_draw_vbo(struct gl_context
*ctx
,
94 const struct gl_client_array
**arrays
,
95 const struct _mesa_prim
*prims
,
97 const struct _mesa_index_buffer
*ib
,
98 GLboolean index_bounds_valid
,
102 struct st_context
*st
= st_context(ctx
);
103 struct pipe_context
*pipe
= st
->pipe
;
104 struct draw_context
*draw
= st
->draw
;
105 const struct st_vertex_program
*vp
;
106 const struct pipe_shader_state
*vs
;
107 struct pipe_vertex_buffer vbuffers
[PIPE_MAX_SHADER_INPUTS
];
108 struct pipe_vertex_element velements
[PIPE_MAX_ATTRIBS
];
109 struct pipe_index_buffer ibuffer
;
110 struct pipe_transfer
*vb_transfer
[PIPE_MAX_ATTRIBS
];
111 struct pipe_transfer
*ib_transfer
= NULL
;
113 const GLubyte
*low_addr
= NULL
;
114 const void *mapped_indices
= NULL
;
118 st_validate_state(st
);
120 if (!index_bounds_valid
)
121 vbo_get_minmax_index(ctx
, prims
, ib
, &min_index
, &max_index
);
123 /* must get these after state validation! */
125 vs
= &st
->vp_variant
->tgsi
;
127 if (!st
->vp_variant
->draw_shader
) {
128 st
->vp_variant
->draw_shader
= draw_create_vertex_shader(draw
, vs
);
132 * Set up the draw module's state.
134 * We'd like to do this less frequently, but the normal state-update
135 * code sends state updates to the pipe, not to our private draw module.
138 draw_set_viewport_state(draw
, &st
->state
.viewport
);
139 draw_set_clip_state(draw
, &st
->state
.clip
);
140 draw_set_rasterizer_state(draw
, &st
->state
.rasterizer
, NULL
);
141 draw_bind_vertex_shader(draw
, st
->vp_variant
->draw_shader
);
142 set_feedback_vertex_format(ctx
);
144 /* Find the lowest address of the arrays we're drawing */
145 if (vp
->num_inputs
) {
146 low_addr
= arrays
[vp
->index_to_input
[0]]->Ptr
;
148 for (attr
= 1; attr
< vp
->num_inputs
; attr
++) {
149 const GLubyte
*start
= arrays
[vp
->index_to_input
[attr
]]->Ptr
;
150 low_addr
= MIN2(low_addr
, start
);
154 /* loop over TGSI shader inputs to determine vertex buffer
157 for (attr
= 0; attr
< vp
->num_inputs
; attr
++) {
158 const GLuint mesaAttr
= vp
->index_to_input
[attr
];
159 struct gl_buffer_object
*bufobj
= arrays
[mesaAttr
]->BufferObj
;
162 if (bufobj
&& bufobj
->Name
) {
163 /* Attribute data is in a VBO.
164 * Recall that for VBOs, the gl_client_array->Ptr field is
165 * really an offset from the start of the VBO, not a pointer.
167 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
168 assert(stobj
->buffer
);
170 vbuffers
[attr
].buffer
= NULL
;
171 pipe_resource_reference(&vbuffers
[attr
].buffer
, stobj
->buffer
);
172 vbuffers
[attr
].buffer_offset
= pointer_to_offset(low_addr
);
173 velements
[attr
].src_offset
= arrays
[mesaAttr
]->Ptr
- low_addr
;
176 /* attribute data is in user-space memory, not a VBO */
177 uint bytes
= (arrays
[mesaAttr
]->Size
178 * _mesa_sizeof_type(arrays
[mesaAttr
]->Type
)
182 vbuffers
[attr
].buffer
183 = pipe_user_buffer_create(pipe
->screen
, (void *) arrays
[mesaAttr
]->Ptr
,
185 PIPE_BIND_VERTEX_BUFFER
);
186 vbuffers
[attr
].buffer_offset
= 0;
187 velements
[attr
].src_offset
= 0;
190 /* common-case setup */
191 vbuffers
[attr
].stride
= arrays
[mesaAttr
]->StrideB
; /* in bytes */
192 velements
[attr
].instance_divisor
= 0;
193 velements
[attr
].vertex_buffer_index
= attr
;
194 velements
[attr
].src_format
=
195 st_pipe_vertex_format(arrays
[mesaAttr
]->Type
,
196 arrays
[mesaAttr
]->Size
,
197 arrays
[mesaAttr
]->Format
,
198 arrays
[mesaAttr
]->Normalized
);
199 assert(velements
[attr
].src_format
);
201 /* tell draw about this attribute */
203 draw_set_vertex_buffer(draw
, attr
, &vbuffer
[attr
]);
206 /* map the attrib buffer */
207 map
= pipe_buffer_map(pipe
, vbuffers
[attr
].buffer
,
210 draw_set_mapped_vertex_buffer(draw
, attr
, map
);
213 draw_set_vertex_buffers(draw
, vp
->num_inputs
, vbuffers
);
214 draw_set_vertex_elements(draw
, vp
->num_inputs
, velements
);
216 memset(&ibuffer
, 0, sizeof(ibuffer
));
218 struct gl_buffer_object
*bufobj
= ib
->obj
;
221 case GL_UNSIGNED_INT
:
222 ibuffer
.index_size
= 4;
224 case GL_UNSIGNED_SHORT
:
225 ibuffer
.index_size
= 2;
227 case GL_UNSIGNED_BYTE
:
228 ibuffer
.index_size
= 1;
232 goto out_unref_vertex
;
235 if (bufobj
&& bufobj
->Name
) {
236 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
238 pipe_resource_reference(&ibuffer
.buffer
, stobj
->buffer
);
239 ibuffer
.offset
= pointer_to_offset(ib
->ptr
);
241 mapped_indices
= pipe_buffer_map(pipe
, stobj
->buffer
,
242 PIPE_TRANSFER_READ
, &ib_transfer
);
245 /* skip setting ibuffer.buffer as the draw module does not use it */
246 mapped_indices
= ib
->ptr
;
249 draw_set_index_buffer(draw
, &ibuffer
);
250 draw_set_mapped_index_buffer(draw
, mapped_indices
);
253 /* set the constant buffer */
254 draw_set_mapped_constant_buffer(st
->draw
, PIPE_SHADER_VERTEX
, 0,
255 st
->state
.constants
[PIPE_SHADER_VERTEX
].ptr
,
256 st
->state
.constants
[PIPE_SHADER_VERTEX
].size
);
260 for (i
= 0; i
< nr_prims
; i
++) {
261 draw_arrays(draw
, prims
[i
].mode
, prims
[i
].start
, prims
[i
].count
);
266 * unmap vertex/index buffers
269 draw_set_mapped_index_buffer(draw
, NULL
);
270 draw_set_index_buffer(draw
, NULL
);
273 pipe_buffer_unmap(pipe
, ib_transfer
);
274 pipe_resource_reference(&ibuffer
.buffer
, NULL
);
278 for (attr
= 0; attr
< vp
->num_inputs
; attr
++) {
279 pipe_buffer_unmap(pipe
, vb_transfer
[attr
]);
280 draw_set_mapped_vertex_buffer(draw
, attr
, NULL
);
281 pipe_resource_reference(&vbuffers
[attr
].buffer
, NULL
);
283 draw_set_vertex_buffers(draw
, 0, NULL
);
286 #endif /* FEATURE_feedback || FEATURE_rastpos */