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/*

 * Mesa 3-D graphics library

 * Version:  7.2

 *

 * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included

 * in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 */

/* Author:

 *    Keith Whitwell 

 */

#include "main/glheader.h"

#include "main/bufferobj.h"

#include "main/context.h"

#include "main/imports.h"

#include "main/mtypes.h"

#include "main/macros.h"

#include "main/light.h"

#include "main/state.h"

#include "vbo_context.h"

#if FEATURE_dlist

/**

 * After playback, copy everything but the position from the

 * last vertex to the saved state

 */

static void

_playback_copy_to_current(struct gl_context *ctx,

                          const struct vbo_save_vertex_list *node)

{

   struct vbo_context *vbo = vbo_context(ctx);

   GLfloat vertex[VBO_ATTRIB_MAX * 4];

   GLfloat *data;

   GLuint i, offset;

   if (node->current_size == 0)

      return;

   if (node->current_data) {

      data = node->current_data;

   }

   else {

      data = vertex;

      if (node->count)

         offset = (node->buffer_offset +

                   (node->count-1) * node->vertex_size * sizeof(GLfloat));

      else

         offset = node->buffer_offset;

      ctx->Driver.GetBufferSubData( ctx, 0, offset,

                                    node->vertex_size * sizeof(GLfloat),

                                    data, node->vertex_store->bufferobj );

      data += node->attrsz[0]; /* skip vertex position */

   }

   for (i = VBO_ATTRIB_POS+1 ; i < VBO_ATTRIB_MAX ; i++) {

      if (node->attrsz[i]) {

	 GLfloat *current = (GLfloat *)vbo->currval[i].Ptr;

         GLfloat tmp[4];

         COPY_CLEAN_4V(tmp,

                       node->attrsz[i],

                       data);

         if (memcmp(current, tmp, 4 * sizeof(GLfloat)) != 0) {

            memcpy(current, tmp, 4 * sizeof(GLfloat));

            vbo->currval[i].Size = node->attrsz[i];

            if (i >= VBO_ATTRIB_FIRST_MATERIAL &&

                i <= VBO_ATTRIB_LAST_MATERIAL)

               ctx->NewState |= _NEW_LIGHT;

            ctx->NewState |= _NEW_CURRENT_ATTRIB;

         }

	 data += node->attrsz[i];

      }

   }

   /* Colormaterial -- this kindof sucks.

    */

   if (ctx->Light.ColorMaterialEnabled) {

      _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);

   }

   /* CurrentExecPrimitive

    */

   if (node->prim_count) {

      const struct _mesa_prim *prim = &node->prim[node->prim_count - 1];

      if (prim->end)

	 ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;

      else

	 ctx->Driver.CurrentExecPrimitive = prim->mode;

   }

}

/**

 * Treat the vertex storage as a VBO, define vertex arrays pointing

 * into it:

 */

static void vbo_bind_vertex_list(struct gl_context *ctx,

                                 const struct vbo_save_vertex_list *node)

{

   struct vbo_context *vbo = vbo_context(ctx);

   struct vbo_save_context *save = &vbo->save;

   struct gl_client_array *arrays = save->arrays;

   GLuint buffer_offset = node->buffer_offset;

   const GLuint *map;

   GLuint attr;

   GLubyte node_attrsz[VBO_ATTRIB_MAX];  /* copy of node->attrsz[] */

   GLbitfield varying_inputs = 0x0;

   memcpy(node_attrsz, node->attrsz, sizeof(node->attrsz));

   /* Install the default (ie Current) attributes first, then overlay

    * all active ones.

    */

   switch (get_program_mode(ctx)) {

   case VP_NONE:

      for (attr = 0; attr < 16; attr++) {

         save->inputs[attr] = &vbo->legacy_currval[attr];

      }

      for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {

         save->inputs[attr + 16] = &vbo->mat_currval[attr];

      }

      map = vbo->map_vp_none;

      break;

   case VP_NV:

   case VP_ARB:

      /* The aliasing of attributes for NV vertex programs has already

       * occurred.  NV vertex programs cannot access material values,

       * nor attributes greater than VERT_ATTRIB_TEX7.

       */

      for (attr = 0; attr < 16; attr++) {

         save->inputs[attr] = &vbo->legacy_currval[attr];

         save->inputs[attr + 16] = &vbo->generic_currval[attr];

      }

      map = vbo->map_vp_arb;

      /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.

       * In that case we effectively need to route the data from

       * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.

       */

      if ((ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_POS) == 0 &&

          (ctx->VertexProgram._Current->Base.InputsRead & VERT_BIT_GENERIC0)) {

         save->inputs[16] = save->inputs[0];

         node_attrsz[16] = node_attrsz[0];

         node_attrsz[0] = 0;

      }

      break;

   default:

      assert(0);

   }

   for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {

      const GLuint src = map[attr];

      if (node_attrsz[src]) {

         /* override the default array set above */

         save->inputs[attr] = &arrays[attr];

	 arrays[attr].Ptr = (const GLubyte *) NULL + buffer_offset;

	 arrays[attr].Size = node->attrsz[src];

	 arrays[attr].StrideB = node->vertex_size * sizeof(GLfloat);

	 arrays[attr].Stride = node->vertex_size * sizeof(GLfloat);

	 arrays[attr].Type = GL_FLOAT;

         arrays[attr].Format = GL_RGBA;

	 arrays[attr].Enabled = 1;

         _mesa_reference_buffer_object(ctx,

                                       &arrays[attr].BufferObj,

                                       node->vertex_store->bufferobj);

	 arrays[attr]._MaxElement = node->count; /* ??? */

	 assert(arrays[attr].BufferObj->Name);

	 buffer_offset += node->attrsz[src] * sizeof(GLfloat);

         varying_inputs |= 1<

      }

   }

   _mesa_set_varying_vp_inputs( ctx, varying_inputs );

}

static void

vbo_save_loopback_vertex_list(struct gl_context *ctx,

                              const struct vbo_save_vertex_list *list)

{

   const char *buffer = ctx->Driver.MapBuffer(ctx,

					      GL_ARRAY_BUFFER_ARB,

					      GL_READ_ONLY, /* ? */

                                              list->vertex_store->bufferobj);

   vbo_loopback_vertex_list(ctx,

                            (const GLfloat *)(buffer + list->buffer_offset),

                            list->attrsz,

                            list->prim,

                            list->prim_count,

                            list->wrap_count,

                            list->vertex_size);

   ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB,

			   list->vertex_store->bufferobj);

}

/**

 * Execute the buffer and save copied verts.

 * This is called from the display list code when executing

 * a drawing command.

 */

void

vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)

{

   const struct vbo_save_vertex_list *node =

      (const struct vbo_save_vertex_list *) data;

   struct vbo_save_context *save = &vbo_context(ctx)->save;

   FLUSH_CURRENT(ctx, 0);

   if (node->prim_count > 0 && node->count > 0) {

      if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END &&

	  node->prim[0].begin) {

	 /* Degenerate case: list is called inside begin/end pair and

	  * includes operations such as glBegin or glDrawArrays.

	  */

	 if (0)

	    printf("displaylist recursive begin");

	 vbo_save_loopback_vertex_list( ctx, node );

	 return;

      }

      else if (save->replay_flags) {

	 /* Various degnerate cases: translate into immediate mode

	  * calls rather than trying to execute in place.

	  */

	 vbo_save_loopback_vertex_list( ctx, node );

	 return;

      }

      if (ctx->NewState)

	 _mesa_update_state( ctx );

      /* XXX also need to check if shader enabled, but invalid */

      if ((ctx->VertexProgram.Enabled && !ctx->VertexProgram._Enabled) ||

          (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled)) {

         _mesa_error(ctx, GL_INVALID_OPERATION,

                     "glBegin (invalid vertex/fragment program)");

         return;

      }

      vbo_bind_vertex_list( ctx, node );

      /* Again...

       */

      if (ctx->NewState)

	 _mesa_update_state( ctx );

      vbo_context(ctx)->draw_prims(ctx,

                                   save->inputs,

                                   node->prim,

                                   node->prim_count,

                                   NULL,

                                   GL_TRUE,

                                   0,	/* Node is a VBO, so this is ok */

                                   node->count - 1);

   }

   /* Copy to current?

    */

   _playback_copy_to_current( ctx, node );

}

#endif /* FEATURE_dlist */