src/mesa/drivers/dri/i965/brw_save_draw.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.1
   4  *
   5  * Copyright (C) 1999-2004  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /* Author:
  26  *    Keith Whitwell <keith@tungstengraphics.com>
  27  */
  28
  29 #include "glheader.h"
  30 #include "context.h"
  31 #include "imports.h"
  32 #include "mtypes.h"
  33 #include "macros.h"
  34 #include "light.h"
  35 #include "state.h"
  36
  37 #include "brw_save.h"
  38 #include "brw_draw.h"
  39 #include "brw_fallback.h"
  40
  41
  42 static void _playback_copy_to_current( GLcontext *ctx,
  43                                        const struct brw_save_vertex_list *node )
  44 {
  45    struct brw_save_context *save = IMM_CONTEXT(ctx)->save;
  46    GLfloat vertex[BRW_ATTRIB_MAX * 4], *data = vertex;
  47    GLuint i, offset;
  48
  49    if (node->count)
  50       offset = node->buffer_offset + (node->count-1) * node->vertex_size;
  51    else
  52       offset = node->buffer_offset;
  53
  54    ctx->Driver.GetBufferSubData( ctx, 0, offset, node->vertex_size,
  55                                  data, node->vertex_store->bufferobj );
  56
  57    for (i = BRW_ATTRIB_POS+1 ; i <= BRW_ATTRIB_INDEX ; i++) {
  58       if (node->attrsz[i]) {
  59          COPY_CLEAN_4V(save->current[i], node->attrsz[i], data);
  60          data += node->attrsz[i];
  61
  62          if (i >= BRW_ATTRIB_MAT_FRONT_AMBIENT &&
  63              i <= BRW_ATTRIB_MAT_BACK_INDEXES)
  64             ctx->NewState |= _NEW_LIGHT;
  65       }
  66    }
  67
  68    /* Edgeflag requires special treatment:
  69     */
  70    if (node->attrsz[BRW_ATTRIB_EDGEFLAG]) {
  71       ctx->Current.EdgeFlag = (data[0] == 1.0);
  72    }
  73
  74
  75 #if 1
  76    /* Colormaterial -- this kindof sucks.
  77     */
  78    if (ctx->Light.ColorMaterialEnabled) {
  79       _mesa_update_color_material(ctx, ctx->Current.Attrib[VERT_ATTRIB_COLOR0]);
  80    }
  81 #endif
  82
  83    /* CurrentExecPrimitive
  84     */
  85    if (node->prim_count) {
  86       const struct brw_draw_prim *prim = &node->prim[node->prim_count - 1];
  87       if (prim->end)
  88          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
  89       else
  90          ctx->Driver.CurrentExecPrimitive = prim->mode;
  91    }
  92 }
  93
  94
  95
  96 /* Treat the vertex storage as a VBO, define vertex arrays pointing
  97  * into it:
  98  */
  99 static void brw_bind_vertex_list( struct brw_save_context *save,
 100                                    const struct brw_save_vertex_list *node )
 101 {
 102    struct gl_client_array *arrays = save->arrays;
 103    GLuint data = node->buffer_offset;
 104    GLuint attr;
 105
 106    memset(arrays, 0, BRW_ATTRIB_MAX * sizeof(arrays[0]));
 107
 108    for (attr = 0; attr <= BRW_ATTRIB_INDEX; attr++) {
 109       if (node->attrsz[attr]) {
 110          arrays[attr].Ptr = (const GLubyte *)data;
 111          arrays[attr].Size = node->attrsz[attr];
 112          arrays[attr].StrideB = node->vertex_size * sizeof(GLfloat);
 113          arrays[attr].Stride = node->vertex_size * sizeof(GLfloat);
 114          arrays[attr].Type = GL_FLOAT;
 115          arrays[attr].Enabled = 1;
 116          arrays[attr].BufferObj = node->vertex_store->bufferobj;
 117          arrays[attr]._MaxElement = node->count; /* ??? */
 118
 119          assert(arrays[attr].BufferObj->Name);
 120
 121          data += node->attrsz[attr] * sizeof(GLfloat);
 122       }
 123    }
 124 }
 125
 126 static void brw_save_loopback_vertex_list( GLcontext *ctx,
 127                                            const struct brw_save_vertex_list *list )
 128 {
 129    const char *buffer = ctx->Driver.MapBuffer(ctx,
 130                                               GL_ARRAY_BUFFER_ARB,
 131                                               GL_DYNAMIC_READ_ARB, /* ? */
 132                                                list->vertex_store->bufferobj);
 133
 134    brw_loopback_vertex_list( ctx,
 135                              (const GLfloat *)(buffer + list->buffer_offset),
 136                              list->attrsz,
 137                              list->prim,
 138                              list->prim_count,
 139                              list->wrap_count,
 140                              list->vertex_size);
 141
 142    ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB,
 143                            list->vertex_store->bufferobj);
 144 }
 145
 146
 147 /**
 148  * Execute the buffer and save copied verts.
 149  */
 150 void brw_save_playback_vertex_list( GLcontext *ctx, void *data )
 151 {
 152    const struct brw_save_vertex_list *node = (const struct brw_save_vertex_list *) data;
 153    struct brw_save_context *save = IMM_CONTEXT(ctx)->save;
 154
 155    FLUSH_CURRENT(ctx, 0);
 156
 157    if (node->prim_count > 0 && node->count > 0) {
 158
 159       if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END &&
 160           node->prim[0].begin) {
 161
 162          /* Degenerate case: list is called inside begin/end pair and
 163           * includes operations such as glBegin or glDrawArrays.
 164           */
 165          if (0)
 166             _mesa_printf("displaylist recursive begin");
 167
 168          brw_save_loopback_vertex_list( ctx, node );
 169          return;
 170       }
 171       else if (save->replay_flags) {
 172          /* Various degnerate cases: translate into immediate mode
 173           * calls rather than trying to execute in place.
 174           */
 175          brw_save_loopback_vertex_list( ctx, node );
 176          return;
 177       }
 178
 179       if (ctx->NewState)
 180          _mesa_update_state( ctx );
 181
 182       if ((ctx->VertexProgram.Enabled && !ctx->VertexProgram._Enabled) ||
 183           (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled)) {
 184          _mesa_error(ctx, GL_INVALID_OPERATION,
 185                      "glBegin (invalid vertex/fragment program)");
 186          return;
 187       }
 188
 189       brw_bind_vertex_list( save, node );
 190
 191       if (!brw_draw_prims( save->ctx,
 192                            save->inputs,
 193                            node->prim,
 194                            node->prim_count,
 195                            NULL,
 196                            0,   /* Node is a VBO, so this is ok */
 197                            node->count,
 198                            0 )) {
 199          brw_fallback(ctx);
 200          brw_save_loopback_vertex_list( ctx, node );
 201          brw_unfallback(ctx);
 202          return;
 203       }
 204    }
 205
 206    /* Copy to current?
 207     */
 208    _playback_copy_to_current( ctx, node );
 209 }