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 "main/bufferobj.h"
35 #include "glapi/dispatch.h"
37 #include "vbo_context.h"
39 /* Compute min and max elements for drawelements calls.
41 static void get_minmax_index( GLuint count, GLuint type,
42 const GLvoid *indices,
49 case GL_UNSIGNED_INT: {
50 const GLuint *ui_indices = (const GLuint *)indices;
51 GLuint max_ui = ui_indices[count-1];
52 GLuint min_ui = ui_indices[0];
53 for (i = 0; i < count; i++) {
54 if (ui_indices[i] > max_ui) max_ui = ui_indices[i];
55 if (ui_indices[i] < min_ui) min_ui = ui_indices[i];
61 case GL_UNSIGNED_SHORT: {
62 const GLushort *us_indices = (const GLushort *)indices;
63 GLuint max_us = us_indices[count-1];
64 GLuint min_us = us_indices[0];
65 for (i = 0; i < count; i++) {
66 if (us_indices[i] > max_us) max_us = us_indices[i];
67 if (us_indices[i] < min_us) min_us = us_indices[i];
73 case GL_UNSIGNED_BYTE: {
74 const GLubyte *ub_indices = (const GLubyte *)indices;
75 GLuint max_ub = ub_indices[count-1];
76 GLuint min_ub = ub_indices[0];
77 for (i = 0; i < count; i++) {
78 if (ub_indices[i] > max_ub) max_ub = ub_indices[i];
79 if (ub_indices[i] < min_ub) min_ub = ub_indices[i];
92 /* Just translate the arrayobj into a sane layout.
94 static void bind_array_obj( GLcontext *ctx )
96 struct vbo_context *vbo = vbo_context(ctx);
97 struct vbo_exec_context *exec = &vbo->exec;
100 /* TODO: Fix the ArrayObj struct to keep legacy arrays in an array
101 * rather than as individual named arrays. Then this function can
104 exec->array.legacy_array[VERT_ATTRIB_POS] = &ctx->Array.ArrayObj->Vertex;
105 exec->array.legacy_array[VERT_ATTRIB_WEIGHT] = &vbo->legacy_currval[VERT_ATTRIB_WEIGHT];
106 exec->array.legacy_array[VERT_ATTRIB_NORMAL] = &ctx->Array.ArrayObj->Normal;
107 exec->array.legacy_array[VERT_ATTRIB_COLOR0] = &ctx->Array.ArrayObj->Color;
108 exec->array.legacy_array[VERT_ATTRIB_COLOR1] = &ctx->Array.ArrayObj->SecondaryColor;
109 exec->array.legacy_array[VERT_ATTRIB_FOG] = &ctx->Array.ArrayObj->FogCoord;
110 exec->array.legacy_array[VERT_ATTRIB_COLOR_INDEX] = &ctx->Array.ArrayObj->Index;
111 if (ctx->Array.ArrayObj->PointSize.Enabled) {
112 /* this aliases COLOR_INDEX */
113 exec->array.legacy_array[VERT_ATTRIB_POINT_SIZE] = &ctx->Array.ArrayObj->PointSize;
115 exec->array.legacy_array[VERT_ATTRIB_EDGEFLAG] = &ctx->Array.ArrayObj->EdgeFlag;
117 for (i = 0; i < 8; i++)
118 exec->array.legacy_array[VERT_ATTRIB_TEX0 + i] = &ctx->Array.ArrayObj->TexCoord[i];
120 for (i = 0; i < VERT_ATTRIB_MAX; i++)
121 exec->array.generic_array[i] = &ctx->Array.ArrayObj->VertexAttrib[i];
123 exec->array.array_obj = ctx->Array.ArrayObj->Name;
126 static void recalculate_input_bindings( GLcontext *ctx )
128 struct vbo_context *vbo = vbo_context(ctx);
129 struct vbo_exec_context *exec = &vbo->exec;
130 const struct gl_client_array **inputs = &exec->array.inputs[0];
131 GLbitfield const_inputs = 0x0;
134 exec->array.program_mode = get_program_mode(ctx);
135 exec->array.enabled_flags = ctx->Array.ArrayObj->_Enabled;
137 switch (exec->array.program_mode) {
139 /* When no vertex program is active, we put the material values
140 * into the generic slots. This is the only situation where
141 * material values are available as per-vertex attributes.
143 for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {
144 if (exec->array.legacy_array[i]->Enabled)
145 inputs[i] = exec->array.legacy_array[i];
147 inputs[i] = &vbo->legacy_currval[i];
148 const_inputs |= 1 << i;
152 for (i = 0; i < MAT_ATTRIB_MAX; i++) {
153 inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->mat_currval[i];
154 const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);
157 /* Could use just about anything, just to fill in the empty
160 for (i = MAT_ATTRIB_MAX; i < VERT_ATTRIB_MAX - VERT_ATTRIB_GENERIC0; i++) {
161 inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->generic_currval[i];
162 const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);
167 /* NV_vertex_program - attribute arrays alias and override
168 * conventional, legacy arrays. No materials, and the generic
171 for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {
172 if (exec->array.generic_array[i]->Enabled)
173 inputs[i] = exec->array.generic_array[i];
174 else if (exec->array.legacy_array[i]->Enabled)
175 inputs[i] = exec->array.legacy_array[i];
177 inputs[i] = &vbo->legacy_currval[i];
178 const_inputs |= 1 << i;
182 /* Could use just about anything, just to fill in the empty
185 for (i = VERT_ATTRIB_GENERIC0; i < VERT_ATTRIB_MAX; i++) {
186 inputs[i] = &vbo->generic_currval[i - VERT_ATTRIB_GENERIC0];
187 const_inputs |= 1 << i;
192 /* ARB_vertex_program - Only the attribute zero (position) array
193 * aliases and overrides the legacy position array.
195 * Otherwise, legacy attributes available in the legacy slots,
196 * generic attributes in the generic slots and materials are not
197 * available as per-vertex attributes.
199 if (exec->array.generic_array[0]->Enabled)
200 inputs[0] = exec->array.generic_array[0];
201 else if (exec->array.legacy_array[0]->Enabled)
202 inputs[0] = exec->array.legacy_array[0];
204 inputs[0] = &vbo->legacy_currval[0];
205 const_inputs |= 1 << 0;
209 for (i = 1; i <= VERT_ATTRIB_TEX7; i++) {
210 if (exec->array.legacy_array[i]->Enabled)
211 inputs[i] = exec->array.legacy_array[i];
213 inputs[i] = &vbo->legacy_currval[i];
214 const_inputs |= 1 << i;
218 for (i = 0; i < 16; i++) {
219 if (exec->array.generic_array[i]->Enabled)
220 inputs[VERT_ATTRIB_GENERIC0 + i] = exec->array.generic_array[i];
222 inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->generic_currval[i];
223 const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);
230 _mesa_set_varying_vp_inputs( ctx, ~const_inputs );
233 static void bind_arrays( GLcontext *ctx )
236 if (ctx->Array.ArrayObj.Name != exec->array.array_obj) {
238 recalculate_input_bindings(ctx);
240 else if (exec->array.program_mode != get_program_mode(ctx) ||
241 exec->array.enabled_flags != ctx->Array.ArrayObj->_Enabled) {
243 recalculate_input_bindings(ctx);
247 recalculate_input_bindings(ctx);
253 /***********************************************************************
257 static void GLAPIENTRY
258 vbo_exec_DrawArrays(GLenum mode, GLint start, GLsizei count)
260 GET_CURRENT_CONTEXT(ctx);
261 struct vbo_context *vbo = vbo_context(ctx);
262 struct vbo_exec_context *exec = &vbo->exec;
263 struct _mesa_prim prim[1];
265 if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))
268 FLUSH_CURRENT( ctx, 0 );
271 _mesa_update_state( ctx );
273 if (!vbo_validate_shaders(ctx)) {
274 _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawArrays(bad shader)");
283 _mesa_update_state( ctx );
290 prim[0].start = start;
291 prim[0].count = count;
294 vbo->draw_prims( ctx, exec->array.inputs, prim, 1, NULL, start, start + count - 1 );
300 _mesa_printf("vbo_exec_DrawArrays(mode 0x%x, start %d, count %d):\n",
303 for (i = 0; i < 32; i++) {
304 GLuint bufName = exec->array.inputs[i]->BufferObj->Name;
305 GLint stride = exec->array.inputs[i]->Stride;
306 _mesa_printf("attr %2d: size %d stride %d enabled %d "
307 "ptr %p Bufobj %u\n",
309 exec->array.inputs[i]->Size,
311 /*exec->array.inputs[i]->Enabled,*/
312 exec->array.legacy_array[i]->Enabled,
313 exec->array.inputs[i]->Ptr,
317 struct gl_buffer_object *buf = _mesa_lookup_bufferobj(ctx, bufName);
318 GLubyte *p = ctx->Driver.MapBuffer(ctx, GL_ARRAY_BUFFER_ARB,
319 GL_READ_ONLY_ARB, buf);
320 int offset = (int) exec->array.inputs[i]->Ptr;
321 float *f = (float *) (p + offset);
324 int n = (count * stride) / 4;
327 _mesa_printf(" Data at offset %d:\n", offset);
328 for (i = 0; i < n; i++) {
329 _mesa_printf(" float[%d] = 0x%08x %f\n", i, k[i], f[i]);
331 ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB, buf);
340 static void GLAPIENTRY
341 vbo_exec_DrawRangeElements(GLenum mode,
342 GLuint start, GLuint end,
343 GLsizei count, GLenum type, const GLvoid *indices)
345 GET_CURRENT_CONTEXT(ctx);
346 struct vbo_context *vbo = vbo_context(ctx);
347 struct vbo_exec_context *exec = &vbo->exec;
348 struct _mesa_index_buffer ib;
349 struct _mesa_prim prim[1];
351 if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count, type, indices ))
354 FLUSH_CURRENT( ctx, 0 );
357 _mesa_update_state( ctx );
359 if (!vbo_validate_shaders(ctx)) {
360 _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawRangeElements(bad shader)");
367 _mesa_update_state( ctx );
371 ib.obj = ctx->Array.ElementArrayBufferObj;
380 prim[0].count = count;
383 /* Need to give special consideration to rendering a range of
384 * indices starting somewhere above zero. Typically the
385 * application is issuing multiple DrawRangeElements() to draw
386 * successive primitives layed out linearly in the vertex arrays.
387 * Unless the vertex arrays are all in a VBO (or locked as with
388 * CVA), the OpenGL semantics imply that we need to re-read or
389 * re-upload the vertex data on each draw call.
391 * In the case of hardware tnl, we want to avoid starting the
392 * upload at zero, as it will mean every draw call uploads an
393 * increasing amount of not-used vertex data. Worse - in the
394 * software tnl module, all those vertices might be transformed and
395 * lit but never rendered.
397 * If we just upload or transform the vertices in start..end,
398 * however, the indices will be incorrect.
400 * At this level, we don't know exactly what the requirements of
401 * the backend are going to be, though it will likely boil down to
404 * 1) Do nothing, everything is in a VBO and is processed once
407 * 2) Adjust the indices and vertex arrays so that start becomes
410 * Rather than doing anything here, I'll provide a helper function
411 * for the latter case elsewhere.
414 vbo->draw_prims( ctx, exec->array.inputs, prim, 1, &ib, start, end );
417 static void GLAPIENTRY
418 vbo_exec_DrawElements(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices)
420 GET_CURRENT_CONTEXT(ctx);
421 GLuint min_index = 0;
422 GLuint max_index = 0;
424 if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
427 if (!vbo_validate_shaders(ctx)) {
428 _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawElements(bad shader)");
432 if (ctx->Array.ElementArrayBufferObj->Name) {
433 const GLvoid *map = ctx->Driver.MapBuffer(ctx,
434 GL_ELEMENT_ARRAY_BUFFER_ARB,
436 ctx->Array.ElementArrayBufferObj);
438 get_minmax_index(count, type, ADD_POINTERS(map, indices), &min_index, &max_index);
440 ctx->Driver.UnmapBuffer(ctx,
441 GL_ELEMENT_ARRAY_BUFFER_ARB,
442 ctx->Array.ElementArrayBufferObj);
445 get_minmax_index(count, type, indices, &min_index, &max_index);
448 vbo_exec_DrawRangeElements(mode, min_index, max_index, count, type, indices);
452 /***********************************************************************
459 void vbo_exec_array_init( struct vbo_exec_context *exec )
462 exec->vtxfmt.DrawArrays = vbo_exec_DrawArrays;
463 exec->vtxfmt.DrawElements = vbo_exec_DrawElements;
464 exec->vtxfmt.DrawRangeElements = vbo_exec_DrawRangeElements;
466 exec->vtxfmt.DrawArrays = _mesa_noop_DrawArrays;
467 exec->vtxfmt.DrawElements = _mesa_noop_DrawElements;
468 exec->vtxfmt.DrawRangeElements = _mesa_noop_DrawRangeElements;
473 void vbo_exec_array_destroy( struct vbo_exec_context *exec )
479 /* This API entrypoint is not ordinarily used */
481 _mesa_DrawArrays(GLenum mode, GLint first, GLsizei count)
483 vbo_exec_DrawArrays(mode, first, count);
487 /* This API entrypoint is not ordinarily used */
489 _mesa_DrawElements(GLenum mode, GLsizei count, GLenum type,
490 const GLvoid *indices)
492 vbo_exec_DrawElements(mode, count, type, indices);
496 /* This API entrypoint is not ordinarily used */
498 _mesa_DrawRangeElements(GLenum mode, GLuint start, GLuint end, GLsizei count,
499 GLenum type, const GLvoid *indices)
501 vbo_exec_DrawRangeElements(mode, start, end, count, type, indices);