st_draw_feedback.c revision 7e291e922e53a70d84751538b15c6c16310cca7f
1/************************************************************************** 2 * 3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. 4 * All Rights Reserved. 5 * 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: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 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. 25 * 26 **************************************************************************/ 27 28#include "main/imports.h" 29#include "main/image.h" 30#include "main/macros.h" 31#include "main/mfeatures.h" 32 33#include "vbo/vbo.h" 34 35#include "st_context.h" 36#include "st_atom.h" 37#include "st_cb_bufferobjects.h" 38#include "st_draw.h" 39#include "st_program.h" 40 41#include "pipe/p_context.h" 42#include "pipe/p_defines.h" 43#include "util/u_inlines.h" 44 45#include "draw/draw_private.h" 46#include "draw/draw_context.h" 47 48 49#if FEATURE_feedback || FEATURE_rastpos 50 51/** 52 * Set the (private) draw module's post-transformed vertex format when in 53 * GL_SELECT or GL_FEEDBACK mode or for glRasterPos. 54 */ 55static void 56set_feedback_vertex_format(struct gl_context *ctx) 57{ 58#if 0 59 struct st_context *st = st_context(ctx); 60 struct vertex_info vinfo; 61 GLuint i; 62 63 memset(&vinfo, 0, sizeof(vinfo)); 64 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; 70 } 71 else { 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; 78 } 79 } 80 81 draw_set_vertex_info(st->draw, &vinfo); 82#endif 83} 84 85 86/** 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. 91 */ 92void 93st_feedback_draw_vbo(struct gl_context *ctx, 94 const struct gl_client_array **arrays, 95 const struct _mesa_prim *prims, 96 GLuint nr_prims, 97 const struct _mesa_index_buffer *ib, 98 GLboolean index_bounds_valid, 99 GLuint min_index, 100 GLuint max_index, 101 struct gl_transform_feedback_object *tfb_vertcount) 102{ 103 struct st_context *st = st_context(ctx); 104 struct pipe_context *pipe = st->pipe; 105 struct draw_context *draw = st->draw; 106 const struct st_vertex_program *vp; 107 const struct pipe_shader_state *vs; 108 struct pipe_vertex_buffer vbuffers[PIPE_MAX_SHADER_INPUTS]; 109 struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS]; 110 struct pipe_index_buffer ibuffer; 111 struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS]; 112 struct pipe_transfer *ib_transfer = NULL; 113 GLuint attr, i; 114 const GLubyte *low_addr = NULL; 115 const void *mapped_indices = NULL; 116 117 assert(draw); 118 119 st_validate_state(st); 120 121 if (!index_bounds_valid) 122 vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index); 123 124 /* must get these after state validation! */ 125 vp = st->vp; 126 vs = &st->vp_variant->tgsi; 127 128 if (!st->vp_variant->draw_shader) { 129 st->vp_variant->draw_shader = draw_create_vertex_shader(draw, vs); 130 } 131 132 /* 133 * Set up the draw module's state. 134 * 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. 137 */ 138 assert(draw); 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); 144 145 /* 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; 148 149 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); 152 } 153 } 154 155 /* loop over TGSI shader inputs to determine vertex buffer 156 * and attribute info 157 */ 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; 161 void *map; 162 163 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. 167 */ 168 struct st_buffer_object *stobj = st_buffer_object(bufobj); 169 assert(stobj->buffer); 170 171 vbuffers[attr].buffer = NULL; 172 pipe_resource_reference(&vbuffers[attr].buffer, stobj->buffer); 173 vbuffers[attr].buffer_offset = pointer_to_offset(low_addr); 174 velements[attr].src_offset = arrays[mesaAttr]->Ptr - low_addr; 175 } 176 else { 177 /* attribute data is in user-space memory, not a VBO */ 178 uint bytes = (arrays[mesaAttr]->Size 179 * _mesa_sizeof_type(arrays[mesaAttr]->Type) 180 * (max_index + 1)); 181 182 /* wrap user data */ 183 vbuffers[attr].buffer 184 = pipe_user_buffer_create(pipe->screen, (void *) arrays[mesaAttr]->Ptr, 185 bytes, 186 PIPE_BIND_VERTEX_BUFFER); 187 vbuffers[attr].buffer_offset = 0; 188 velements[attr].src_offset = 0; 189 } 190 191 /* common-case setup */ 192 vbuffers[attr].stride = arrays[mesaAttr]->StrideB; /* in bytes */ 193 velements[attr].instance_divisor = 0; 194 velements[attr].vertex_buffer_index = attr; 195 velements[attr].src_format = 196 st_pipe_vertex_format(arrays[mesaAttr]->Type, 197 arrays[mesaAttr]->Size, 198 arrays[mesaAttr]->Format, 199 arrays[mesaAttr]->Normalized, 200 arrays[mesaAttr]->Integer); 201 assert(velements[attr].src_format); 202 203 /* tell draw about this attribute */ 204#if 0 205 draw_set_vertex_buffer(draw, attr, &vbuffer[attr]); 206#endif 207 208 /* map the attrib buffer */ 209 map = pipe_buffer_map(pipe, vbuffers[attr].buffer, 210 PIPE_TRANSFER_READ, 211 &vb_transfer[attr]); 212 draw_set_mapped_vertex_buffer(draw, attr, map); 213 } 214 215 draw_set_vertex_buffers(draw, vp->num_inputs, vbuffers); 216 draw_set_vertex_elements(draw, vp->num_inputs, velements); 217 218 memset(&ibuffer, 0, sizeof(ibuffer)); 219 if (ib) { 220 struct gl_buffer_object *bufobj = ib->obj; 221 222 ibuffer.index_size = vbo_sizeof_ib_type(ib->type); 223 if (ibuffer.index_size == 0) 224 goto out_unref_vertex; 225 226 if (bufobj && bufobj->Name) { 227 struct st_buffer_object *stobj = st_buffer_object(bufobj); 228 229 pipe_resource_reference(&ibuffer.buffer, stobj->buffer); 230 ibuffer.offset = pointer_to_offset(ib->ptr); 231 232 mapped_indices = pipe_buffer_map(pipe, stobj->buffer, 233 PIPE_TRANSFER_READ, &ib_transfer); 234 } 235 else { 236 /* skip setting ibuffer.buffer as the draw module does not use it */ 237 mapped_indices = ib->ptr; 238 } 239 240 draw_set_index_buffer(draw, &ibuffer); 241 draw_set_mapped_index_buffer(draw, mapped_indices); 242 } 243 244 /* set the constant buffer */ 245 draw_set_mapped_constant_buffer(st->draw, PIPE_SHADER_VERTEX, 0, 246 st->state.constants[PIPE_SHADER_VERTEX].ptr, 247 st->state.constants[PIPE_SHADER_VERTEX].size); 248 249 250 /* draw here */ 251 for (i = 0; i < nr_prims; i++) { 252 draw_arrays(draw, prims[i].mode, prims[i].start, prims[i].count); 253 } 254 255 256 /* 257 * unmap vertex/index buffers 258 */ 259 if (ib) { 260 draw_set_mapped_index_buffer(draw, NULL); 261 draw_set_index_buffer(draw, NULL); 262 263 if (ib_transfer) 264 pipe_buffer_unmap(pipe, ib_transfer); 265 pipe_resource_reference(&ibuffer.buffer, NULL); 266 } 267 268 out_unref_vertex: 269 for (attr = 0; attr < vp->num_inputs; attr++) { 270 pipe_buffer_unmap(pipe, vb_transfer[attr]); 271 draw_set_mapped_vertex_buffer(draw, attr, NULL); 272 pipe_resource_reference(&vbuffers[attr].buffer, NULL); 273 } 274 draw_set_vertex_buffers(draw, 0, NULL); 275} 276 277#endif /* FEATURE_feedback || FEATURE_rastpos */ 278 279