1 /**************************************************************************
3 * Copyright 2003 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 **************************************************************************/
31 #include "api_validate.h"
35 #include "vbo_context.h"
37 /* Compute min and max elements for drawelements calls.
39 static void get_minmax_index( GLuint count
, GLuint type
,
40 const GLvoid
*indices
,
47 case GL_UNSIGNED_INT
: {
48 const GLuint
*ui_indices
= (const GLuint
*)indices
;
49 GLuint max_ui
= ui_indices
[0];
50 GLuint min_ui
= ui_indices
[0];
51 for (i
= 1; i
< count
; i
++) {
52 if (ui_indices
[i
] > max_ui
) max_ui
= ui_indices
[i
];
53 if (ui_indices
[i
] < min_ui
) min_ui
= ui_indices
[i
];
59 case GL_UNSIGNED_SHORT
: {
60 const GLushort
*us_indices
= (const GLushort
*)indices
;
61 GLuint max_us
= us_indices
[0];
62 GLuint min_us
= us_indices
[0];
63 for (i
= 1; i
< count
; i
++) {
64 if (us_indices
[i
] > max_us
) max_us
= us_indices
[i
];
65 if (us_indices
[i
] < min_us
) min_us
= us_indices
[i
];
71 case GL_UNSIGNED_BYTE
: {
72 const GLubyte
*ub_indices
= (const GLubyte
*)indices
;
73 GLuint max_ub
= ub_indices
[0];
74 GLuint min_ub
= ub_indices
[0];
75 for (i
= 1; i
< count
; i
++) {
76 if (ub_indices
[i
] > max_ub
) max_ub
= ub_indices
[i
];
77 if (ub_indices
[i
] < min_ub
) min_ub
= ub_indices
[i
];
90 /* Just translate the arrayobj into a sane layout.
92 static void bind_array_obj( GLcontext
*ctx
)
94 struct vbo_context
*vbo
= vbo_context(ctx
);
95 struct vbo_exec_context
*exec
= &vbo
->exec
;
98 /* TODO: Fix the ArrayObj struct to keep legacy arrays in an array
99 * rather than as individual named arrays. Then this function can
102 exec
->array
.legacy_array
[VERT_ATTRIB_POS
] = &ctx
->Array
.ArrayObj
->Vertex
;
103 exec
->array
.legacy_array
[VERT_ATTRIB_WEIGHT
] = &vbo
->legacy_currval
[VERT_ATTRIB_WEIGHT
];
104 exec
->array
.legacy_array
[VERT_ATTRIB_NORMAL
] = &ctx
->Array
.ArrayObj
->Normal
;
105 exec
->array
.legacy_array
[VERT_ATTRIB_COLOR0
] = &ctx
->Array
.ArrayObj
->Color
;
106 exec
->array
.legacy_array
[VERT_ATTRIB_COLOR1
] = &ctx
->Array
.ArrayObj
->SecondaryColor
;
107 exec
->array
.legacy_array
[VERT_ATTRIB_FOG
] = &ctx
->Array
.ArrayObj
->FogCoord
;
108 exec
->array
.legacy_array
[VERT_ATTRIB_COLOR_INDEX
] = &ctx
->Array
.ArrayObj
->Index
;
109 exec
->array
.legacy_array
[VERT_ATTRIB_EDGEFLAG
] = &ctx
->Array
.ArrayObj
->EdgeFlag
;
111 for (i
= 0; i
< 8; i
++)
112 exec
->array
.legacy_array
[VERT_ATTRIB_TEX0
+ i
] = &ctx
->Array
.ArrayObj
->TexCoord
[i
];
114 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++)
115 exec
->array
.generic_array
[i
] = &ctx
->Array
.ArrayObj
->VertexAttrib
[i
];
117 exec
->array
.array_obj
= ctx
->Array
.ArrayObj
->Name
;
120 static void recalculate_input_bindings( GLcontext
*ctx
)
122 struct vbo_context
*vbo
= vbo_context(ctx
);
123 struct vbo_exec_context
*exec
= &vbo
->exec
;
124 const struct gl_client_array
**inputs
= &exec
->array
.inputs
[0];
127 exec
->array
.program_mode
= get_program_mode(ctx
);
128 exec
->array
.enabled_flags
= ctx
->Array
.ArrayObj
->_Enabled
;
130 switch (exec
->array
.program_mode
) {
132 /* When no vertex program is active, we put the material values
133 * into the generic slots. This is the only situation where
134 * material values are available as per-vertex attributes.
136 for (i
= 0; i
<= VERT_ATTRIB_TEX7
; i
++) {
137 if (exec
->array
.legacy_array
[i
]->Enabled
)
138 inputs
[i
] = exec
->array
.legacy_array
[i
];
140 inputs
[i
] = &vbo
->legacy_currval
[i
];
143 for (i
= 0; i
< MAT_ATTRIB_MAX
; i
++) {
144 inputs
[VERT_ATTRIB_GENERIC0
+ i
] = &vbo
->mat_currval
[i
];
147 /* Could use just about anything, just to fill in the empty
150 for (i
= MAT_ATTRIB_MAX
; i
< VERT_ATTRIB_MAX
- VERT_ATTRIB_GENERIC0
; i
++)
151 inputs
[VERT_ATTRIB_GENERIC0
+ i
] = &vbo
->generic_currval
[i
];
155 /* NV_vertex_program - attribute arrays alias and override
156 * conventional, legacy arrays. No materials, and the generic
159 for (i
= 0; i
<= VERT_ATTRIB_TEX7
; i
++) {
160 if (exec
->array
.generic_array
[i
]->Enabled
)
161 inputs
[i
] = exec
->array
.generic_array
[i
];
162 else if (exec
->array
.legacy_array
[i
]->Enabled
)
163 inputs
[i
] = exec
->array
.legacy_array
[i
];
165 inputs
[i
] = &vbo
->legacy_currval
[i
];
168 /* Could use just about anything, just to fill in the empty
171 for (i
= VERT_ATTRIB_GENERIC0
; i
< VERT_ATTRIB_MAX
; i
++)
172 inputs
[i
] = &vbo
->generic_currval
[i
- VERT_ATTRIB_GENERIC0
];
176 /* ARB_vertex_program - Only the attribute zero (position) array
177 * aliases and overrides the legacy position array.
179 * Otherwise, legacy attributes available in the legacy slots,
180 * generic attributes in the generic slots and materials are not
181 * available as per-vertex attributes.
183 if (exec
->array
.generic_array
[0]->Enabled
)
184 inputs
[0] = exec
->array
.generic_array
[0];
185 else if (exec
->array
.legacy_array
[0]->Enabled
)
186 inputs
[0] = exec
->array
.legacy_array
[0];
188 inputs
[0] = &vbo
->legacy_currval
[0];
191 for (i
= 1; i
<= VERT_ATTRIB_TEX7
; i
++) {
192 if (exec
->array
.legacy_array
[i
]->Enabled
)
193 inputs
[i
] = exec
->array
.legacy_array
[i
];
195 inputs
[i
] = &vbo
->legacy_currval
[i
];
198 for (i
= 0; i
< 16; i
++) {
199 if (exec
->array
.generic_array
[i
]->Enabled
)
200 inputs
[VERT_ATTRIB_GENERIC0
+ i
] = exec
->array
.generic_array
[i
];
202 inputs
[VERT_ATTRIB_GENERIC0
+ i
] = &vbo
->generic_currval
[i
];
208 static void bind_arrays( GLcontext
*ctx
)
211 if (ctx
->Array
.ArrayObj
.Name
!= exec
->array
.array_obj
) {
213 recalculate_input_bindings(ctx
);
215 else if (exec
->array
.program_mode
!= get_program_mode(ctx
) ||
216 exec
->array
.enabled_flags
!= ctx
->Array
.ArrayObj
->_Enabled
) {
218 recalculate_input_bindings(ctx
);
222 recalculate_input_bindings(ctx
);
228 /***********************************************************************
232 static void GLAPIENTRY
233 vbo_exec_DrawArrays(GLenum mode
, GLint start
, GLsizei count
)
235 GET_CURRENT_CONTEXT(ctx
);
236 struct vbo_context
*vbo
= vbo_context(ctx
);
237 struct vbo_exec_context
*exec
= &vbo
->exec
;
238 struct _mesa_prim prim
[1];
240 if (!_mesa_validate_DrawArrays( ctx
, mode
, start
, count
))
243 FLUSH_CURRENT( ctx
, 0 );
246 _mesa_update_state( ctx
);
255 prim
[0].start
= start
;
256 prim
[0].count
= count
;
259 vbo
->draw_prims( ctx
, exec
->array
.inputs
, prim
, 1, NULL
, start
, start
+ count
- 1 );
264 static void GLAPIENTRY
265 vbo_exec_DrawRangeElements(GLenum mode
,
266 GLuint start
, GLuint end
,
267 GLsizei count
, GLenum type
, const GLvoid
*indices
)
269 GET_CURRENT_CONTEXT(ctx
);
270 struct vbo_context
*vbo
= vbo_context(ctx
);
271 struct vbo_exec_context
*exec
= &vbo
->exec
;
272 struct _mesa_index_buffer ib
;
273 struct _mesa_prim prim
[1];
275 if (!_mesa_validate_DrawRangeElements( ctx
, mode
, start
, end
, count
, type
, indices
))
278 FLUSH_CURRENT( ctx
, 0 );
281 _mesa_update_state( ctx
);
287 ib
.obj
= ctx
->Array
.ElementArrayBufferObj
;
296 prim
[0].count
= count
;
299 /* Need to give special consideration to rendering a range of
300 * indices starting somewhere above zero. Typically the
301 * application is issuing multiple DrawRangeElements() to draw
302 * successive primitives layed out linearly in the vertex arrays.
303 * Unless the vertex arrays are all in a VBO (or locked as with
304 * CVA), the OpenGL semantics imply that we need to re-read or
305 * re-upload the vertex data on each draw call.
307 * In the case of hardware tnl, we want to avoid starting the
308 * upload at zero, as it will mean every draw call uploads an
309 * increasing amount of not-used vertex data. Worse - in the
310 * software tnl module, all those vertices might be transformed and
311 * lit but never rendered.
313 * If we just upload or transform the vertices in start..end,
314 * however, the indices will be incorrect.
316 * At this level, we don't know exactly what the requirements of
317 * the backend are going to be, though it will likely boil down to
320 * 1) Do nothing, everything is in a VBO and is processed once
323 * 2) Adjust the indices and vertex arrays so that start becomes
326 * Rather than doing anything here, I'll provide a helper function
327 * for the latter case elsewhere.
330 vbo
->draw_prims( ctx
, exec
->array
.inputs
, prim
, 1, &ib
, start
, end
);
333 static void GLAPIENTRY
334 vbo_exec_DrawElements(GLenum mode
, GLsizei count
, GLenum type
, const GLvoid
*indices
)
336 GET_CURRENT_CONTEXT(ctx
);
337 GLuint min_index
= 0;
338 GLuint max_index
= 0;
340 if (!_mesa_validate_DrawElements( ctx
, mode
, count
, type
, indices
))
343 if (ctx
->Array
.ElementArrayBufferObj
->Name
) {
344 const GLvoid
*map
= ctx
->Driver
.MapBuffer(ctx
,
345 GL_ELEMENT_ARRAY_BUFFER_ARB
,
347 ctx
->Array
.ElementArrayBufferObj
);
349 get_minmax_index(count
, type
, ADD_POINTERS(map
, indices
), &min_index
, &max_index
);
351 ctx
->Driver
.UnmapBuffer(ctx
,
352 GL_ELEMENT_ARRAY_BUFFER_ARB
,
353 ctx
->Array
.ElementArrayBufferObj
);
356 get_minmax_index(count
, type
, indices
, &min_index
, &max_index
);
359 vbo_exec_DrawRangeElements(mode
, min_index
, max_index
, count
, type
, indices
);
363 /***********************************************************************
370 void vbo_exec_array_init( struct vbo_exec_context
*exec
)
373 exec
->vtxfmt
.DrawArrays
= vbo_exec_DrawArrays
;
374 exec
->vtxfmt
.DrawElements
= vbo_exec_DrawElements
;
375 exec
->vtxfmt
.DrawRangeElements
= vbo_exec_DrawRangeElements
;
377 exec
->vtxfmt
.DrawArrays
= _mesa_noop_DrawArrays
;
378 exec
->vtxfmt
.DrawElements
= _mesa_noop_DrawElements
;
379 exec
->vtxfmt
.DrawRangeElements
= _mesa_noop_DrawRangeElements
;
384 void vbo_exec_array_destroy( struct vbo_exec_context
*exec
)