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 _mesa_prim
*prims
,
96 const struct _mesa_index_buffer
*ib
,
97 GLboolean index_bounds_valid
,
100 struct gl_transform_feedback_object
*tfb_vertcount
)
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
] = {NULL
};
111 struct pipe_transfer
*ib_transfer
= NULL
;
112 const struct gl_client_array
**arrays
= ctx
->Array
._DrawArrays
;
114 const GLubyte
*low_addr
= NULL
;
115 const void *mapped_indices
= NULL
;
119 st_validate_state(st
);
121 if (!index_bounds_valid
)
122 vbo_get_minmax_indices(ctx
, prims
, ib
, &min_index
, &max_index
, nr_prims
);
124 /* must get these after state validation! */
126 vs
= &st
->vp_variant
->tgsi
;
128 if (!st
->vp_variant
->draw_shader
) {
129 st
->vp_variant
->draw_shader
= draw_create_vertex_shader(draw
, vs
);
133 * Set up the draw module's state.
135 * We'd like to do this less frequently, but the normal state-update
136 * code sends state updates to the pipe, not to our private draw module.
139 draw_set_viewport_state(draw
, &st
->state
.viewport
);
140 draw_set_clip_state(draw
, &st
->state
.clip
);
141 draw_set_rasterizer_state(draw
, &st
->state
.rasterizer
, NULL
);
142 draw_bind_vertex_shader(draw
, st
->vp_variant
->draw_shader
);
143 set_feedback_vertex_format(ctx
);
145 /* Find the lowest address of the arrays we're drawing */
146 if (vp
->num_inputs
) {
147 low_addr
= arrays
[vp
->index_to_input
[0]]->Ptr
;
149 for (attr
= 1; attr
< vp
->num_inputs
; attr
++) {
150 const GLubyte
*start
= arrays
[vp
->index_to_input
[attr
]]->Ptr
;
151 low_addr
= MIN2(low_addr
, start
);
155 /* loop over TGSI shader inputs to determine vertex buffer
158 for (attr
= 0; attr
< vp
->num_inputs
; attr
++) {
159 const GLuint mesaAttr
= vp
->index_to_input
[attr
];
160 struct gl_buffer_object
*bufobj
= arrays
[mesaAttr
]->BufferObj
;
163 if (bufobj
&& bufobj
->Name
) {
164 /* Attribute data is in a VBO.
165 * Recall that for VBOs, the gl_client_array->Ptr field is
166 * really an offset from the start of the VBO, not a pointer.
168 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
169 assert(stobj
->buffer
);
171 vbuffers
[attr
].buffer
= NULL
;
172 vbuffers
[attr
].user_buffer
= NULL
;
173 pipe_resource_reference(&vbuffers
[attr
].buffer
, stobj
->buffer
);
174 vbuffers
[attr
].buffer_offset
= pointer_to_offset(low_addr
);
175 velements
[attr
].src_offset
= arrays
[mesaAttr
]->Ptr
- low_addr
;
177 /* map the attrib buffer */
178 map
= pipe_buffer_map(pipe
, vbuffers
[attr
].buffer
,
181 draw_set_mapped_vertex_buffer(draw
, attr
, map
);
184 vbuffers
[attr
].buffer
= NULL
;
185 vbuffers
[attr
].user_buffer
= arrays
[mesaAttr
]->Ptr
;
186 vbuffers
[attr
].buffer_offset
= 0;
187 velements
[attr
].src_offset
= 0;
189 draw_set_mapped_vertex_buffer(draw
, attr
, vbuffers
[attr
].user_buffer
);
192 /* common-case setup */
193 vbuffers
[attr
].stride
= arrays
[mesaAttr
]->StrideB
; /* in bytes */
194 velements
[attr
].instance_divisor
= 0;
195 velements
[attr
].vertex_buffer_index
= attr
;
196 velements
[attr
].src_format
=
197 st_pipe_vertex_format(arrays
[mesaAttr
]->Type
,
198 arrays
[mesaAttr
]->Size
,
199 arrays
[mesaAttr
]->Format
,
200 arrays
[mesaAttr
]->Normalized
,
201 arrays
[mesaAttr
]->Integer
);
202 assert(velements
[attr
].src_format
);
204 /* tell draw about this attribute */
206 draw_set_vertex_buffer(draw
, attr
, &vbuffer
[attr
]);
210 draw_set_vertex_buffers(draw
, vp
->num_inputs
, vbuffers
);
211 draw_set_vertex_elements(draw
, vp
->num_inputs
, velements
);
213 memset(&ibuffer
, 0, sizeof(ibuffer
));
215 struct gl_buffer_object
*bufobj
= ib
->obj
;
217 ibuffer
.index_size
= vbo_sizeof_ib_type(ib
->type
);
218 if (ibuffer
.index_size
== 0)
219 goto out_unref_vertex
;
221 if (bufobj
&& bufobj
->Name
) {
222 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
224 pipe_resource_reference(&ibuffer
.buffer
, stobj
->buffer
);
225 ibuffer
.offset
= pointer_to_offset(ib
->ptr
);
227 mapped_indices
= pipe_buffer_map(pipe
, stobj
->buffer
,
228 PIPE_TRANSFER_READ
, &ib_transfer
);
231 /* skip setting ibuffer.buffer as the draw module does not use it */
232 mapped_indices
= ib
->ptr
;
235 draw_set_indexes(draw
,
236 (ubyte
*) mapped_indices
+ ibuffer
.offset
,
240 /* set the constant buffer */
241 draw_set_mapped_constant_buffer(st
->draw
, PIPE_SHADER_VERTEX
, 0,
242 st
->state
.constants
[PIPE_SHADER_VERTEX
].ptr
,
243 st
->state
.constants
[PIPE_SHADER_VERTEX
].size
);
247 for (i
= 0; i
< nr_prims
; i
++) {
248 draw_arrays(draw
, prims
[i
].mode
, prims
[i
].start
, prims
[i
].count
);
253 * unmap vertex/index buffers
256 draw_set_indexes(draw
, NULL
, 0);
258 pipe_buffer_unmap(pipe
, ib_transfer
);
259 pipe_resource_reference(&ibuffer
.buffer
, NULL
);
263 for (attr
= 0; attr
< vp
->num_inputs
; attr
++) {
264 if (vb_transfer
[attr
])
265 pipe_buffer_unmap(pipe
, vb_transfer
[attr
]);
266 draw_set_mapped_vertex_buffer(draw
, attr
, NULL
);
267 pipe_resource_reference(&vbuffers
[attr
].buffer
, NULL
);
269 draw_set_vertex_buffers(draw
, 0, NULL
);
272 #endif /* FEATURE_feedback || FEATURE_rastpos */