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 **************************************************************************/
28 #include "main/glheader.h"
29 #include "main/context.h"
30 #include "main/state.h"
31 #include "main/api_validate.h"
32 #include "main/api_noop.h"
33 #include "main/varray.h"
34 #include "glapi/dispatch.h"
36 #include "vbo_context.h"
38 /* Compute min and max elements for drawelements calls.
40 static void get_minmax_index( GLuint count
, GLuint type
,
41 const GLvoid
*indices
,
48 case GL_UNSIGNED_INT
: {
49 const GLuint
*ui_indices
= (const GLuint
*)indices
;
50 GLuint max_ui
= ui_indices
[count
-1];
51 GLuint min_ui
= ui_indices
[0];
52 for (i
= 0; i
< count
; i
++) {
53 if (ui_indices
[i
] > max_ui
) max_ui
= ui_indices
[i
];
54 if (ui_indices
[i
] < min_ui
) min_ui
= ui_indices
[i
];
60 case GL_UNSIGNED_SHORT
: {
61 const GLushort
*us_indices
= (const GLushort
*)indices
;
62 GLuint max_us
= us_indices
[count
-1];
63 GLuint min_us
= us_indices
[0];
64 for (i
= 0; i
< count
; i
++) {
65 if (us_indices
[i
] > max_us
) max_us
= us_indices
[i
];
66 if (us_indices
[i
] < min_us
) min_us
= us_indices
[i
];
72 case GL_UNSIGNED_BYTE
: {
73 const GLubyte
*ub_indices
= (const GLubyte
*)indices
;
74 GLuint max_ub
= ub_indices
[count
-1];
75 GLuint min_ub
= ub_indices
[0];
76 for (i
= 0; i
< count
; i
++) {
77 if (ub_indices
[i
] > max_ub
) max_ub
= ub_indices
[i
];
78 if (ub_indices
[i
] < min_ub
) min_ub
= ub_indices
[i
];
91 /* Just translate the arrayobj into a sane layout.
93 static void bind_array_obj( GLcontext
*ctx
)
95 struct vbo_context
*vbo
= vbo_context(ctx
);
96 struct vbo_exec_context
*exec
= &vbo
->exec
;
99 /* TODO: Fix the ArrayObj struct to keep legacy arrays in an array
100 * rather than as individual named arrays. Then this function can
103 exec
->array
.legacy_array
[VERT_ATTRIB_POS
] = &ctx
->Array
.ArrayObj
->Vertex
;
104 exec
->array
.legacy_array
[VERT_ATTRIB_WEIGHT
] = &vbo
->legacy_currval
[VERT_ATTRIB_WEIGHT
];
105 exec
->array
.legacy_array
[VERT_ATTRIB_NORMAL
] = &ctx
->Array
.ArrayObj
->Normal
;
106 exec
->array
.legacy_array
[VERT_ATTRIB_COLOR0
] = &ctx
->Array
.ArrayObj
->Color
;
107 exec
->array
.legacy_array
[VERT_ATTRIB_COLOR1
] = &ctx
->Array
.ArrayObj
->SecondaryColor
;
108 exec
->array
.legacy_array
[VERT_ATTRIB_FOG
] = &ctx
->Array
.ArrayObj
->FogCoord
;
109 exec
->array
.legacy_array
[VERT_ATTRIB_COLOR_INDEX
] = &ctx
->Array
.ArrayObj
->Index
;
110 if (ctx
->Array
.ArrayObj
->PointSize
.Enabled
) {
111 /* this aliases COLOR_INDEX */
112 exec
->array
.legacy_array
[VERT_ATTRIB_POINT_SIZE
] = &ctx
->Array
.ArrayObj
->PointSize
;
114 exec
->array
.legacy_array
[VERT_ATTRIB_EDGEFLAG
] = &ctx
->Array
.ArrayObj
->EdgeFlag
;
116 for (i
= 0; i
< 8; i
++)
117 exec
->array
.legacy_array
[VERT_ATTRIB_TEX0
+ i
] = &ctx
->Array
.ArrayObj
->TexCoord
[i
];
119 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++)
120 exec
->array
.generic_array
[i
] = &ctx
->Array
.ArrayObj
->VertexAttrib
[i
];
122 exec
->array
.array_obj
= ctx
->Array
.ArrayObj
->Name
;
125 static void recalculate_input_bindings( GLcontext
*ctx
)
127 struct vbo_context
*vbo
= vbo_context(ctx
);
128 struct vbo_exec_context
*exec
= &vbo
->exec
;
129 const struct gl_client_array
**inputs
= &exec
->array
.inputs
[0];
130 GLbitfield const_inputs
= 0x0;
133 exec
->array
.program_mode
= get_program_mode(ctx
);
134 exec
->array
.enabled_flags
= ctx
->Array
.ArrayObj
->_Enabled
;
136 switch (exec
->array
.program_mode
) {
138 /* When no vertex program is active, we put the material values
139 * into the generic slots. This is the only situation where
140 * material values are available as per-vertex attributes.
142 for (i
= 0; i
<= VERT_ATTRIB_TEX7
; i
++) {
143 if (exec
->array
.legacy_array
[i
]->Enabled
)
144 inputs
[i
] = exec
->array
.legacy_array
[i
];
146 inputs
[i
] = &vbo
->legacy_currval
[i
];
147 const_inputs
|= 1 << i
;
151 for (i
= 0; i
< MAT_ATTRIB_MAX
; i
++) {
152 inputs
[VERT_ATTRIB_GENERIC0
+ i
] = &vbo
->mat_currval
[i
];
153 const_inputs
|= 1 << (VERT_ATTRIB_GENERIC0
+ i
);
156 /* Could use just about anything, just to fill in the empty
159 for (i
= MAT_ATTRIB_MAX
; i
< VERT_ATTRIB_MAX
- VERT_ATTRIB_GENERIC0
; i
++) {
160 inputs
[VERT_ATTRIB_GENERIC0
+ i
] = &vbo
->generic_currval
[i
];
161 const_inputs
|= 1 << (VERT_ATTRIB_GENERIC0
+ i
);
166 /* NV_vertex_program - attribute arrays alias and override
167 * conventional, legacy arrays. No materials, and the generic
170 for (i
= 0; i
<= VERT_ATTRIB_TEX7
; i
++) {
171 if (exec
->array
.generic_array
[i
]->Enabled
)
172 inputs
[i
] = exec
->array
.generic_array
[i
];
173 else if (exec
->array
.legacy_array
[i
]->Enabled
)
174 inputs
[i
] = exec
->array
.legacy_array
[i
];
176 inputs
[i
] = &vbo
->legacy_currval
[i
];
177 const_inputs
|= 1 << i
;
181 /* Could use just about anything, just to fill in the empty
184 for (i
= VERT_ATTRIB_GENERIC0
; i
< VERT_ATTRIB_MAX
; i
++) {
185 inputs
[i
] = &vbo
->generic_currval
[i
- VERT_ATTRIB_GENERIC0
];
186 const_inputs
|= 1 << i
;
191 /* ARB_vertex_program - Only the attribute zero (position) array
192 * aliases and overrides the legacy position array.
194 * Otherwise, legacy attributes available in the legacy slots,
195 * generic attributes in the generic slots and materials are not
196 * available as per-vertex attributes.
198 if (exec
->array
.generic_array
[0]->Enabled
)
199 inputs
[0] = exec
->array
.generic_array
[0];
200 else if (exec
->array
.legacy_array
[0]->Enabled
)
201 inputs
[0] = exec
->array
.legacy_array
[0];
203 inputs
[0] = &vbo
->legacy_currval
[0];
204 const_inputs
|= 1 << 0;
208 for (i
= 1; i
<= VERT_ATTRIB_TEX7
; i
++) {
209 if (exec
->array
.legacy_array
[i
]->Enabled
)
210 inputs
[i
] = exec
->array
.legacy_array
[i
];
212 inputs
[i
] = &vbo
->legacy_currval
[i
];
213 const_inputs
|= 1 << i
;
217 for (i
= 0; i
< 16; i
++) {
218 if (exec
->array
.generic_array
[i
]->Enabled
)
219 inputs
[VERT_ATTRIB_GENERIC0
+ i
] = exec
->array
.generic_array
[i
];
221 inputs
[VERT_ATTRIB_GENERIC0
+ i
] = &vbo
->generic_currval
[i
];
222 const_inputs
|= 1 << (VERT_ATTRIB_GENERIC0
+ i
);
229 _mesa_set_varying_vp_inputs( ctx
, ~const_inputs
);
232 static void bind_arrays( GLcontext
*ctx
)
235 if (ctx
->Array
.ArrayObj
.Name
!= exec
->array
.array_obj
) {
237 recalculate_input_bindings(ctx
);
239 else if (exec
->array
.program_mode
!= get_program_mode(ctx
) ||
240 exec
->array
.enabled_flags
!= ctx
->Array
.ArrayObj
->_Enabled
) {
242 recalculate_input_bindings(ctx
);
246 recalculate_input_bindings(ctx
);
252 /***********************************************************************
256 static void GLAPIENTRY
257 vbo_exec_DrawArrays(GLenum mode
, GLint start
, GLsizei count
)
259 GET_CURRENT_CONTEXT(ctx
);
260 struct vbo_context
*vbo
= vbo_context(ctx
);
261 struct vbo_exec_context
*exec
= &vbo
->exec
;
262 struct _mesa_prim prim
[1];
264 if (!_mesa_validate_DrawArrays( ctx
, mode
, start
, count
))
267 FLUSH_CURRENT( ctx
, 0 );
270 _mesa_update_state( ctx
);
272 if (!vbo_validate_shaders(ctx
)) {
273 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glDrawArrays(bad shader)");
282 _mesa_update_state( ctx
);
289 prim
[0].start
= start
;
290 prim
[0].count
= count
;
293 vbo
->draw_prims( ctx
, exec
->array
.inputs
, prim
, 1, NULL
, start
, start
+ count
- 1 );
298 static void GLAPIENTRY
299 vbo_exec_DrawRangeElements(GLenum mode
,
300 GLuint start
, GLuint end
,
301 GLsizei count
, GLenum type
, const GLvoid
*indices
)
303 GET_CURRENT_CONTEXT(ctx
);
304 struct vbo_context
*vbo
= vbo_context(ctx
);
305 struct vbo_exec_context
*exec
= &vbo
->exec
;
306 struct _mesa_index_buffer ib
;
307 struct _mesa_prim prim
[1];
309 if (!_mesa_validate_DrawRangeElements( ctx
, mode
, start
, end
, count
, type
, indices
))
312 FLUSH_CURRENT( ctx
, 0 );
315 _mesa_update_state( ctx
);
317 if (!vbo_validate_shaders(ctx
)) {
318 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glDrawRangeElements(bad shader)");
325 _mesa_update_state( ctx
);
329 ib
.obj
= ctx
->Array
.ElementArrayBufferObj
;
338 prim
[0].count
= count
;
341 /* Need to give special consideration to rendering a range of
342 * indices starting somewhere above zero. Typically the
343 * application is issuing multiple DrawRangeElements() to draw
344 * successive primitives layed out linearly in the vertex arrays.
345 * Unless the vertex arrays are all in a VBO (or locked as with
346 * CVA), the OpenGL semantics imply that we need to re-read or
347 * re-upload the vertex data on each draw call.
349 * In the case of hardware tnl, we want to avoid starting the
350 * upload at zero, as it will mean every draw call uploads an
351 * increasing amount of not-used vertex data. Worse - in the
352 * software tnl module, all those vertices might be transformed and
353 * lit but never rendered.
355 * If we just upload or transform the vertices in start..end,
356 * however, the indices will be incorrect.
358 * At this level, we don't know exactly what the requirements of
359 * the backend are going to be, though it will likely boil down to
362 * 1) Do nothing, everything is in a VBO and is processed once
365 * 2) Adjust the indices and vertex arrays so that start becomes
368 * Rather than doing anything here, I'll provide a helper function
369 * for the latter case elsewhere.
372 vbo
->draw_prims( ctx
, exec
->array
.inputs
, prim
, 1, &ib
, start
, end
);
375 static void GLAPIENTRY
376 vbo_exec_DrawElements(GLenum mode
, GLsizei count
, GLenum type
, const GLvoid
*indices
)
378 GET_CURRENT_CONTEXT(ctx
);
379 GLuint min_index
= 0;
380 GLuint max_index
= 0;
382 if (!_mesa_validate_DrawElements( ctx
, mode
, count
, type
, indices
))
385 if (!vbo_validate_shaders(ctx
)) {
386 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glDrawElements(bad shader)");
390 if (ctx
->Array
.ElementArrayBufferObj
->Name
) {
391 const GLvoid
*map
= ctx
->Driver
.MapBuffer(ctx
,
392 GL_ELEMENT_ARRAY_BUFFER_ARB
,
394 ctx
->Array
.ElementArrayBufferObj
);
396 get_minmax_index(count
, type
, ADD_POINTERS(map
, indices
), &min_index
, &max_index
);
398 ctx
->Driver
.UnmapBuffer(ctx
,
399 GL_ELEMENT_ARRAY_BUFFER_ARB
,
400 ctx
->Array
.ElementArrayBufferObj
);
403 get_minmax_index(count
, type
, indices
, &min_index
, &max_index
);
406 vbo_exec_DrawRangeElements(mode
, min_index
, max_index
, count
, type
, indices
);
410 /***********************************************************************
417 void vbo_exec_array_init( struct vbo_exec_context
*exec
)
420 exec
->vtxfmt
.DrawArrays
= vbo_exec_DrawArrays
;
421 exec
->vtxfmt
.DrawElements
= vbo_exec_DrawElements
;
422 exec
->vtxfmt
.DrawRangeElements
= vbo_exec_DrawRangeElements
;
424 exec
->vtxfmt
.DrawArrays
= _mesa_noop_DrawArrays
;
425 exec
->vtxfmt
.DrawElements
= _mesa_noop_DrawElements
;
426 exec
->vtxfmt
.DrawRangeElements
= _mesa_noop_DrawRangeElements
;
431 void vbo_exec_array_destroy( struct vbo_exec_context
*exec
)
437 /* This API entrypoint is not ordinarily used */
439 _mesa_DrawArrays(GLenum mode
, GLint first
, GLsizei count
)
441 vbo_exec_DrawArrays(mode
, first
, count
);
445 /* This API entrypoint is not ordinarily used */
447 _mesa_DrawElements(GLenum mode
, GLsizei count
, GLenum type
,
448 const GLvoid
*indices
)
450 vbo_exec_DrawElements(mode
, count
, type
, indices
);
454 /* This API entrypoint is not ordinarily used */
456 _mesa_DrawRangeElements(GLenum mode
, GLuint start
, GLuint end
, GLsizei count
,
457 GLenum type
, const GLvoid
*indices
)
459 vbo_exec_DrawRangeElements(mode
, start
, end
, count
, type
, indices
);