src/mesa/vbo/vbo_save_draw.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   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 "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /* Author:
  26  *    Keith Whitwell <keithw@vmware.com>
  27  */
  28
  29 #include <stdbool.h>
  30 #include "main/arrayobj.h"
  31 #include "main/glheader.h"
  32 #include "main/bufferobj.h"
  33 #include "main/context.h"
  34 #include "main/mesa_private.h"
  35 #include "main/macros.h"
  36 #include "main/light.h"
  37 #include "main/state.h"
  38 #include "main/varray.h"
  39 #include "util/bitscan.h"
  40
  41 #include "vbo_private.h"
  42
  43
  44 static void
  45 copy_vao(struct gl_context *ctx, const struct gl_vertex_array_object *vao,
  46          GLbitfield mask, GLbitfield state, int shift, fi_type **data)
  47 {
  48    struct vbo_context *vbo = vbo_context(ctx);
  49
  50    mask &= vao->Enabled;
  51    while (mask) {
  52       const int i = u_bit_scan(&mask);
  53       const struct gl_array_attributes *attrib = &vao->VertexAttrib[i];
  54       struct gl_array_attributes *currval = &vbo->current[shift + i];
  55       const GLubyte size = attrib->Format.Size;
  56       const GLenum16 type = attrib->Format.Type;
  57       fi_type tmp[8];
  58       int dmul = 1;
  59
  60       if (type == GL_DOUBLE ||
  61           type == GL_UNSIGNED_INT64_ARB)
  62          dmul = 2;
  63
  64       if (dmul == 2)
  65          memcpy(tmp, *data, size * dmul * sizeof(GLfloat));
  66       else
  67          COPY_CLEAN_4V_TYPE_AS_UNION(tmp, size, *data, type);
  68
  69       if (type != currval->Format.Type ||
  70           memcmp(currval->Ptr, tmp, 4 * sizeof(GLfloat) * dmul) != 0) {
  71          memcpy((fi_type*)currval->Ptr, tmp, 4 * sizeof(GLfloat) * dmul);
  72
  73          vbo_set_vertex_format(&currval->Format, size, type);
  74
  75          ctx->NewState |= state;
  76       }
  77
  78       *data += size;
  79    }
  80 }
  81
  82 /**
  83  * After playback, copy everything but the position from the
  84  * last vertex to the saved state
  85  */
  86 static void
  87 playback_copy_to_current(struct gl_context *ctx,
  88                          const struct vbo_save_vertex_list *node)
  89 {
  90    if (!node->current_data)
  91       return;
  92
  93    fi_type *data = node->current_data;
  94    /* Copy conventional attribs and generics except pos */
  95    copy_vao(ctx, node->VAO[VP_MODE_SHADER], ~VERT_BIT_POS & VERT_BIT_ALL,
  96             _NEW_CURRENT_ATTRIB, 0, &data);
  97    /* Copy materials */
  98    copy_vao(ctx, node->VAO[VP_MODE_FF], VERT_BIT_MAT_ALL,
  99             _NEW_CURRENT_ATTRIB | _NEW_LIGHT, VBO_MATERIAL_SHIFT, &data);
 100
 101    /* Colormaterial -- this kindof sucks.
 102     */
 103    if (ctx->Light.ColorMaterialEnabled) {
 104       _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
 105    }
 106
 107    /* CurrentExecPrimitive
 108     */
 109    if (node->prim_count) {
 110       const struct _mesa_prim *prim = &node->prims[node->prim_count - 1];
 111       if (prim->end)
 112          ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
 113       else
 114          ctx->Driver.CurrentExecPrimitive = prim->mode;
 115    }
 116 }
 117
 118
 119
 120 /**
 121  * Set the appropriate VAO to draw.
 122  */
 123 static void
 124 bind_vertex_list(struct gl_context *ctx,
 125                  const struct vbo_save_vertex_list *node)
 126 {
 127    const gl_vertex_processing_mode mode = ctx->VertexProgram._VPMode;
 128    _mesa_set_draw_vao(ctx, node->VAO[mode], _vbo_get_vao_filter(mode));
 129 }
 130
 131
 132 static void
 133 loopback_vertex_list(struct gl_context *ctx,
 134                      const struct vbo_save_vertex_list *list)
 135 {
 136    struct gl_buffer_object *bo = list->VAO[0]->BufferBinding[0].BufferObj;
 137    ctx->Driver.MapBufferRange(ctx, 0, bo->Size, GL_MAP_READ_BIT, /* ? */
 138                               bo, MAP_INTERNAL);
 139
 140    /* Note that the range of referenced vertices must be mapped already */
 141    _vbo_loopback_vertex_list(ctx, list);
 142
 143    ctx->Driver.UnmapBuffer(ctx, bo, MAP_INTERNAL);
 144 }
 145
 146
 147 /**
 148  * Execute the buffer and save copied verts.
 149  * This is called from the display list code when executing
 150  * a drawing command.
 151  */
 152 void
 153 vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
 154 {
 155    const struct vbo_save_vertex_list *node =
 156       (const struct vbo_save_vertex_list *) data;
 157    struct vbo_context *vbo = vbo_context(ctx);
 158    struct vbo_save_context *save = &vbo->save;
 159    GLboolean remap_vertex_store = GL_FALSE;
 160
 161    if (save->vertex_store && save->vertex_store->buffer_map) {
 162       /* The vertex store is currently mapped but we're about to replay
 163        * a display list.  This can happen when a nested display list is
 164        * being build with GL_COMPILE_AND_EXECUTE.
 165        * We never want to have mapped vertex buffers when we're drawing.
 166        * Unmap the vertex store, execute the list, then remap the vertex
 167        * store.
 168        */
 169       vbo_save_unmap_vertex_store(ctx, save->vertex_store);
 170       remap_vertex_store = GL_TRUE;
 171    }
 172
 173    FLUSH_FOR_DRAW(ctx);
 174
 175    if (node->prim_count > 0) {
 176
 177       if (_mesa_inside_begin_end(ctx) && node->prims[0].begin) {
 178          /* Error: we're about to begin a new primitive but we're already
 179           * inside a glBegin/End pair.
 180           */
 181          _mesa_error(ctx, GL_INVALID_OPERATION,
 182                      "draw operation inside glBegin/End");
 183          goto end;
 184       }
 185       else if (save->replay_flags) {
 186          /* Various degenerate cases: translate into immediate mode
 187           * calls rather than trying to execute in place.
 188           */
 189          loopback_vertex_list(ctx, node);
 190
 191          goto end;
 192       }
 193
 194       bind_vertex_list(ctx, node);
 195
 196       /* Need that at least one time. */
 197       if (ctx->NewState)
 198          _mesa_update_state(ctx);
 199
 200       /* XXX also need to check if shader enabled, but invalid */
 201       if ((ctx->VertexProgram.Enabled &&
 202            !_mesa_arb_vertex_program_enabled(ctx)) ||
 203           (ctx->FragmentProgram.Enabled &&
 204            !_mesa_arb_fragment_program_enabled(ctx))) {
 205          _mesa_error(ctx, GL_INVALID_OPERATION,
 206                      "glBegin (invalid vertex/fragment program)");
 207          return;
 208       }
 209
 210       assert(ctx->NewState == 0);
 211
 212       if (node->vertex_count > 0) {
 213          GLuint min_index = _vbo_save_get_min_index(node);
 214          GLuint max_index = _vbo_save_get_max_index(node);
 215          ctx->Driver.Draw(ctx, node->prims, node->prim_count, NULL, GL_TRUE,
 216                           min_index, max_index, 1, 0, NULL, 0);
 217       }
 218    }
 219
 220    /* Copy to current?
 221     */
 222    playback_copy_to_current(ctx, node);
 223
 224 end:
 225    if (remap_vertex_store) {
 226       save->buffer_ptr = vbo_save_map_vertex_store(ctx, save->vertex_store);
 227    }
 228 }