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"
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 "pipe/p_inlines.h"
44 #include "draw/draw_private.h"
45 #include "draw/draw_context.h"
48 #if FEATURE_feedback || FEATURE_drawpix
51 * Set the (private) draw module's post-transformed vertex format when in
52 * GL_SELECT or GL_FEEDBACK mode or for glRasterPos.
55 set_feedback_vertex_format(GLcontext
*ctx
)
58 struct st_context
*st
= ctx
->st
;
59 struct vertex_info vinfo
;
62 memset(&vinfo
, 0, sizeof(vinfo
));
64 if (ctx
->RenderMode
== GL_SELECT
) {
65 assert(ctx
->RenderMode
== GL_SELECT
);
66 vinfo
.num_attribs
= 1;
67 vinfo
.format
[0] = FORMAT_4F
;
68 vinfo
.interp_mode
[0] = INTERP_LINEAR
;
71 /* GL_FEEDBACK, or glRasterPos */
72 /* emit all attribs (pos, color, texcoord) as GLfloat[4] */
73 vinfo
.num_attribs
= st
->state
.vs
->cso
->state
.num_outputs
;
74 for (i
= 0; i
< vinfo
.num_attribs
; i
++) {
75 vinfo
.format
[i
] = FORMAT_4F
;
76 vinfo
.interp_mode
[i
] = INTERP_LINEAR
;
80 draw_set_vertex_info(st
->draw
, &vinfo
);
86 * Called by VBO to draw arrays when in selection or feedback mode and
87 * to implement glRasterPos.
88 * This is very much like the normal draw_vbo() function above.
89 * Look at code refactoring some day.
90 * Might move this into the failover module some day.
93 st_feedback_draw_vbo(GLcontext
*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
= ctx
->st
;
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_buffer
*index_buffer_handle
= 0;
108 struct pipe_vertex_buffer vbuffers
[PIPE_MAX_SHADER_INPUTS
];
109 struct pipe_vertex_element velements
[PIPE_MAX_ATTRIBS
];
111 ubyte
*mapped_constants
;
115 st_validate_state(ctx
->st
);
117 if (!index_bounds_valid
)
118 vbo_get_minmax_index(ctx
, prims
, ib
, &min_index
, &max_index
);
120 /* must get these after state validation! */
122 vs
= &st
->vp_varient
->state
;
124 if (!st
->vp_varient
->draw_shader
) {
125 st
->vp_varient
->draw_shader
= draw_create_vertex_shader(draw
, vs
);
129 * Set up the draw module's state.
131 * We'd like to do this less frequently, but the normal state-update
132 * code sends state updates to the pipe, not to our private draw module.
135 draw_set_viewport_state(draw
, &st
->state
.viewport
);
136 draw_set_clip_state(draw
, &st
->state
.clip
);
137 draw_set_rasterizer_state(draw
, &st
->state
.rasterizer
);
138 draw_bind_vertex_shader(draw
, st
->vp_varient
->draw_shader
);
139 set_feedback_vertex_format(ctx
);
141 /* loop over TGSI shader inputs to determine vertex buffer
144 for (attr
= 0; attr
< vp
->num_inputs
; attr
++) {
145 const GLuint mesaAttr
= vp
->index_to_input
[attr
];
146 struct gl_buffer_object
*bufobj
= arrays
[mesaAttr
]->BufferObj
;
149 if (bufobj
&& bufobj
->Name
) {
150 /* Attribute data is in a VBO.
151 * Recall that for VBOs, the gl_client_array->Ptr field is
152 * really an offset from the start of the VBO, not a pointer.
154 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
155 assert(stobj
->buffer
);
157 vbuffers
[attr
].buffer
= NULL
;
158 pipe_buffer_reference(&vbuffers
[attr
].buffer
, stobj
->buffer
);
159 vbuffers
[attr
].buffer_offset
= pointer_to_offset(arrays
[0]->Ptr
);
160 velements
[attr
].src_offset
= arrays
[mesaAttr
]->Ptr
- arrays
[0]->Ptr
;
163 /* attribute data is in user-space memory, not a VBO */
164 uint bytes
= (arrays
[mesaAttr
]->Size
165 * _mesa_sizeof_type(arrays
[mesaAttr
]->Type
)
169 vbuffers
[attr
].buffer
170 = pipe_user_buffer_create(pipe
->screen
, (void *) arrays
[mesaAttr
]->Ptr
,
172 vbuffers
[attr
].buffer_offset
= 0;
173 velements
[attr
].src_offset
= 0;
176 /* common-case setup */
177 vbuffers
[attr
].stride
= arrays
[mesaAttr
]->StrideB
; /* in bytes */
178 vbuffers
[attr
].max_index
= max_index
;
179 velements
[attr
].instance_divisor
= 0;
180 velements
[attr
].vertex_buffer_index
= attr
;
181 velements
[attr
].nr_components
= arrays
[mesaAttr
]->Size
;
182 velements
[attr
].src_format
=
183 st_pipe_vertex_format(arrays
[mesaAttr
]->Type
,
184 arrays
[mesaAttr
]->Size
,
185 arrays
[mesaAttr
]->Format
,
186 arrays
[mesaAttr
]->Normalized
);
187 assert(velements
[attr
].src_format
);
189 /* tell draw about this attribute */
191 draw_set_vertex_buffer(draw
, attr
, &vbuffer
[attr
]);
194 /* map the attrib buffer */
195 map
= pipe_buffer_map(pipe
->screen
, vbuffers
[attr
].buffer
,
196 PIPE_BUFFER_USAGE_CPU_READ
);
197 draw_set_mapped_vertex_buffer(draw
, attr
, map
);
200 draw_set_vertex_buffers(draw
, vp
->num_inputs
, vbuffers
);
201 draw_set_vertex_elements(draw
, vp
->num_inputs
, velements
);
204 struct gl_buffer_object
*bufobj
= ib
->obj
;
209 case GL_UNSIGNED_INT
:
212 case GL_UNSIGNED_SHORT
:
220 if (bufobj
&& bufobj
->Name
) {
221 struct st_buffer_object
*stobj
= st_buffer_object(bufobj
);
223 index_buffer_handle
= stobj
->buffer
;
225 map
= pipe_buffer_map(pipe
->screen
, index_buffer_handle
,
226 PIPE_BUFFER_USAGE_CPU_READ
);
228 draw_set_mapped_element_buffer(draw
, indexSize
, map
);
231 draw_set_mapped_element_buffer(draw
, indexSize
, (void *) ib
->ptr
);
235 /* no index/element buffer */
236 draw_set_mapped_element_buffer(draw
, 0, NULL
);
240 /* map constant buffers */
241 mapped_constants
= pipe_buffer_map(pipe
->screen
,
242 st
->state
.constants
[PIPE_SHADER_VERTEX
],
243 PIPE_BUFFER_USAGE_CPU_READ
);
244 draw_set_mapped_constant_buffer(st
->draw
, PIPE_SHADER_VERTEX
, 0,
246 st
->state
.constants
[PIPE_SHADER_VERTEX
]->size
);
250 for (i
= 0; i
< nr_prims
; i
++) {
251 draw_arrays(draw
, prims
[i
].mode
, prims
[i
].start
, prims
[i
].count
);
255 /* unmap constant buffers */
256 pipe_buffer_unmap(pipe
->screen
, st
->state
.constants
[PIPE_SHADER_VERTEX
]);
259 * unmap vertex/index buffers
261 for (i
= 0; i
< PIPE_MAX_ATTRIBS
; i
++) {
262 if (draw
->pt
.vertex_buffer
[i
].buffer
) {
263 pipe_buffer_unmap(pipe
->screen
, draw
->pt
.vertex_buffer
[i
].buffer
);
264 pipe_buffer_reference(&draw
->pt
.vertex_buffer
[i
].buffer
, NULL
);
265 draw_set_mapped_vertex_buffer(draw
, i
, NULL
);
268 if (index_buffer_handle
) {
269 pipe_buffer_unmap(pipe
->screen
, index_buffer_handle
);
270 draw_set_mapped_element_buffer(draw
, 0, NULL
);
274 #endif /* FEATURE_feedback || FEATURE_drawpix */