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 *

 * Copyright 2007 VMware, Inc.

 * Copyright 2012 Marek Olšák 

 * 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, sub license, 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 (including the

 * next paragraph) 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 NON-INFRINGEMENT.

 * IN NO EVENT SHALL AUTHORS AND/OR ITS SUPPLIERS 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.

 *

 **************************************************************************/

 * This converts the VBO's vertex attribute/array information into

 * Gallium vertex state and binds it.

 *

 * Authors:

 *   Keith Whitwell 

 *   Marek Olšák 

 */

#include "st_atom.h"

#include "st_cb_bufferobjects.h"

#include "st_draw.h"

#include "st_program.h"

#include "util/u_math.h"

#include "main/bufferobj.h"

#include "main/glformats.h"

   PIPE_FORMAT_R64_FLOAT,

   PIPE_FORMAT_R64G64_FLOAT,

   PIPE_FORMAT_R64G64B64_FLOAT,

   PIPE_FORMAT_R64G64B64A64_FLOAT

};

   PIPE_FORMAT_R32_FLOAT,

   PIPE_FORMAT_R32G32_FLOAT,

   PIPE_FORMAT_R32G32B32_FLOAT,

   PIPE_FORMAT_R32G32B32A32_FLOAT

};

   PIPE_FORMAT_R16_FLOAT,

   PIPE_FORMAT_R16G16_FLOAT,

   PIPE_FORMAT_R16G16B16_FLOAT,

   PIPE_FORMAT_R16G16B16A16_FLOAT

};

   PIPE_FORMAT_R32_UNORM,

   PIPE_FORMAT_R32G32_UNORM,

   PIPE_FORMAT_R32G32B32_UNORM,

   PIPE_FORMAT_R32G32B32A32_UNORM

};

   PIPE_FORMAT_R32_USCALED,

   PIPE_FORMAT_R32G32_USCALED,

   PIPE_FORMAT_R32G32B32_USCALED,

   PIPE_FORMAT_R32G32B32A32_USCALED

};

   PIPE_FORMAT_R32_UINT,

   PIPE_FORMAT_R32G32_UINT,

   PIPE_FORMAT_R32G32B32_UINT,

   PIPE_FORMAT_R32G32B32A32_UINT

};

   PIPE_FORMAT_R32_SNORM,

   PIPE_FORMAT_R32G32_SNORM,

   PIPE_FORMAT_R32G32B32_SNORM,

   PIPE_FORMAT_R32G32B32A32_SNORM

};

   PIPE_FORMAT_R32_SSCALED,

   PIPE_FORMAT_R32G32_SSCALED,

   PIPE_FORMAT_R32G32B32_SSCALED,

   PIPE_FORMAT_R32G32B32A32_SSCALED

};

   PIPE_FORMAT_R32_SINT,

   PIPE_FORMAT_R32G32_SINT,

   PIPE_FORMAT_R32G32B32_SINT,

   PIPE_FORMAT_R32G32B32A32_SINT

};

   PIPE_FORMAT_R16_UNORM,

   PIPE_FORMAT_R16G16_UNORM,

   PIPE_FORMAT_R16G16B16_UNORM,

   PIPE_FORMAT_R16G16B16A16_UNORM

};

   PIPE_FORMAT_R16_USCALED,

   PIPE_FORMAT_R16G16_USCALED,

   PIPE_FORMAT_R16G16B16_USCALED,

   PIPE_FORMAT_R16G16B16A16_USCALED

};

   PIPE_FORMAT_R16_UINT,

   PIPE_FORMAT_R16G16_UINT,

   PIPE_FORMAT_R16G16B16_UINT,

   PIPE_FORMAT_R16G16B16A16_UINT

};

   PIPE_FORMAT_R16_SNORM,

   PIPE_FORMAT_R16G16_SNORM,

   PIPE_FORMAT_R16G16B16_SNORM,

   PIPE_FORMAT_R16G16B16A16_SNORM

};

   PIPE_FORMAT_R16_SSCALED,

   PIPE_FORMAT_R16G16_SSCALED,

   PIPE_FORMAT_R16G16B16_SSCALED,

   PIPE_FORMAT_R16G16B16A16_SSCALED

};

   PIPE_FORMAT_R16_SINT,

   PIPE_FORMAT_R16G16_SINT,

   PIPE_FORMAT_R16G16B16_SINT,

   PIPE_FORMAT_R16G16B16A16_SINT

};

   PIPE_FORMAT_R8_UNORM,

   PIPE_FORMAT_R8G8_UNORM,

   PIPE_FORMAT_R8G8B8_UNORM,

   PIPE_FORMAT_R8G8B8A8_UNORM

};

   PIPE_FORMAT_R8_USCALED,

   PIPE_FORMAT_R8G8_USCALED,

   PIPE_FORMAT_R8G8B8_USCALED,

   PIPE_FORMAT_R8G8B8A8_USCALED

};

   PIPE_FORMAT_R8_UINT,

   PIPE_FORMAT_R8G8_UINT,

   PIPE_FORMAT_R8G8B8_UINT,

   PIPE_FORMAT_R8G8B8A8_UINT

};

   PIPE_FORMAT_R8_SNORM,

   PIPE_FORMAT_R8G8_SNORM,

   PIPE_FORMAT_R8G8B8_SNORM,

   PIPE_FORMAT_R8G8B8A8_SNORM

};

   PIPE_FORMAT_R8_SSCALED,

   PIPE_FORMAT_R8G8_SSCALED,

   PIPE_FORMAT_R8G8B8_SSCALED,

   PIPE_FORMAT_R8G8B8A8_SSCALED

};

   PIPE_FORMAT_R8_SINT,

   PIPE_FORMAT_R8G8_SINT,

   PIPE_FORMAT_R8G8B8_SINT,

   PIPE_FORMAT_R8G8B8A8_SINT

};

   PIPE_FORMAT_R32_FIXED,

   PIPE_FORMAT_R32G32_FIXED,

   PIPE_FORMAT_R32G32B32_FIXED,

   PIPE_FORMAT_R32G32B32A32_FIXED

};

 * Return a PIPE_FORMAT_x for the given GL datatype and size.

 */

enum pipe_format

st_pipe_vertex_format(GLenum type, GLuint size, GLenum format,

                      GLboolean normalized, GLboolean integer)

{

   assert((type >= GL_BYTE && type <= GL_DOUBLE) ||

          type == GL_FIXED || type == GL_HALF_FLOAT ||

          type == GL_INT_2_10_10_10_REV ||

          type == GL_UNSIGNED_INT_2_10_10_10_REV ||

          type == GL_UNSIGNED_INT_10F_11F_11F_REV);

   assert(size >= 1);

   assert(size <= 4);

   assert(format == GL_RGBA || format == GL_BGRA);

       type == GL_UNSIGNED_INT_2_10_10_10_REV) {

      assert(size == 4);

      assert(!integer);

         if (type == GL_INT_2_10_10_10_REV) {

            if (normalized)

               return PIPE_FORMAT_B10G10R10A2_SNORM;

            else

               return PIPE_FORMAT_B10G10R10A2_SSCALED;

         } else {

            if (normalized)

               return PIPE_FORMAT_B10G10R10A2_UNORM;

            else

               return PIPE_FORMAT_B10G10R10A2_USCALED;

         }

      } else {

         if (type == GL_INT_2_10_10_10_REV) {

            if (normalized)

               return PIPE_FORMAT_R10G10B10A2_SNORM;

            else

               return PIPE_FORMAT_R10G10B10A2_SSCALED;

         } else {

            if (normalized)

               return PIPE_FORMAT_R10G10B10A2_UNORM;

            else

               return PIPE_FORMAT_R10G10B10A2_USCALED;

         }

      }

   }

      assert(size == 3);

      assert(!integer);

      assert(format == GL_RGBA);

   }

      /* this is an odd-ball case */

      assert(type == GL_UNSIGNED_BYTE);

      assert(normalized);

      return PIPE_FORMAT_B8G8R8A8_UNORM;

   }

      switch (type) {

      case GL_INT: return int_types_int[size-1];

      case GL_SHORT: return short_types_int[size-1];

      case GL_BYTE: return byte_types_int[size-1];

      case GL_UNSIGNED_INT: return uint_types_int[size-1];

      case GL_UNSIGNED_SHORT: return ushort_types_int[size-1];

      case GL_UNSIGNED_BYTE: return ubyte_types_int[size-1];

      default: assert(0); return 0;

      }

   }

   else if (normalized) {

      switch (type) {

      case GL_DOUBLE: return double_types[size-1];

      case GL_FLOAT: return float_types[size-1];

      case GL_HALF_FLOAT: return half_float_types[size-1];

      case GL_INT: return int_types_norm[size-1];

      case GL_SHORT: return short_types_norm[size-1];

      case GL_BYTE: return byte_types_norm[size-1];

      case GL_UNSIGNED_INT: return uint_types_norm[size-1];

      case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1];

      case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1];

      case GL_FIXED: return fixed_types[size-1];

      default: assert(0); return 0;

      }

   }

   else {

      switch (type) {

      case GL_DOUBLE: return double_types[size-1];

      case GL_FLOAT: return float_types[size-1];

      case GL_HALF_FLOAT: return half_float_types[size-1];

      case GL_INT: return int_types_scale[size-1];

      case GL_SHORT: return short_types_scale[size-1];

      case GL_BYTE: return byte_types_scale[size-1];

      case GL_UNSIGNED_INT: return uint_types_scale[size-1];

      case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1];

      case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1];

      case GL_FIXED: return fixed_types[size-1];

      default: assert(0); return 0;

      }

   }

   return PIPE_FORMAT_NONE; /* silence compiler warning */

}

get_client_array(const struct st_vertex_program *vp,

                 const struct gl_client_array **arrays,

                 int attr)

{

   const GLuint mesaAttr = vp->index_to_input[attr];

   /* st_program uses 0xffffffff to denote a double placeholder attribute */

   if (mesaAttr == ST_DOUBLE_ATTRIB_PLACEHOLDER)

      return NULL;

   return arrays[mesaAttr];

}

 * Examine the active arrays to determine if we have interleaved

 * vertex arrays all living in one VBO, or all living in user space.

 */

static GLboolean

is_interleaved_arrays(const struct st_vertex_program *vp,

                      const struct st_vp_variant *vpv,

                      const struct gl_client_array **arrays)

{

   GLuint attr;

   const struct gl_buffer_object *firstBufObj = NULL;

   GLint firstStride = -1;

   const GLubyte *firstPtr = NULL;

   GLboolean userSpaceBuffer = GL_FALSE;

      const struct gl_client_array *array;

      const struct gl_buffer_object *bufObj;

      GLsizei stride;

      if (!array)

	 continue;

      bufObj = array->BufferObj;

      if (attr == 0) {

         /* save info about the first array */

         firstStride = stride;

         firstPtr = array->Ptr;

         firstBufObj = bufObj;

         userSpaceBuffer = !bufObj || !bufObj->Name;

      }

      else {

         /* check if other arrays interleave with the first, in same buffer */

         if (stride != firstStride)

            return GL_FALSE; /* strides don't match */

            return GL_FALSE; /* arrays in different VBOs */

            return GL_FALSE; /* arrays start too far apart */

            return GL_FALSE; /* mix of VBO and user-space arrays */

      }

   }

}

                          int src_offset, int format,

                          int instance_divisor, int vbo_index)

{

   velement->src_offset = src_offset;

   velement->src_format = format;

   velement->instance_divisor = instance_divisor;

   velement->vertex_buffer_index = vbo_index;

   assert(velement->src_format);

}

                                  struct pipe_vertex_element *velements,

                                  int src_offset, int format,

                                  int instance_divisor, int vbo_index,

                                  int nr_components, GLboolean doubles,

                                  GLuint *attr_idx)

{

   int idx = *attr_idx;

   if (doubles) {

      int lower_format;

         lower_format = PIPE_FORMAT_R32G32_UINT;

      else if (nr_components >= 2)

         lower_format = PIPE_FORMAT_R32G32B32A32_UINT;

                    lower_format, instance_divisor, vbo_index);

      idx++;

         if (nr_components == 3)

            lower_format = PIPE_FORMAT_R32G32_UINT;

         else if (nr_components >= 4)

            lower_format = PIPE_FORMAT_R32G32B32A32_UINT;

                       lower_format, instance_divisor, vbo_index);

         idx++;

      }

   } else {

      init_velement(&velements[idx], src_offset,

                    format, instance_divisor, vbo_index);

      idx++;

   }

   *attr_idx = idx;

}

 * Set up for drawing interleaved arrays that all live in one VBO

 * or all live in user space.

 * \param vbuffer  returns vertex buffer info

 * \param velements  returns vertex element info

 */

static boolean

setup_interleaved_attribs(struct st_context *st,

                          const struct st_vertex_program *vp,

                          const struct st_vp_variant *vpv,

                          const struct gl_client_array **arrays,

                          struct pipe_vertex_buffer *vbuffer,

                          struct pipe_vertex_element velements[],

                          unsigned *num_velements)

{

   GLuint attr, attr_idx;

   const GLubyte *low_addr = NULL;

   GLboolean usingVBO;      /* all arrays in a VBO? */

   struct gl_buffer_object *bufobj;

   GLsizei stride;

    * Init bufobj and stride.

    */

   if (vpv->num_inputs) {

      const struct gl_client_array *array;

      assert(array);

       * one buffer object and the stride will be the same for all arrays.

       * Grab them now.

       */

      bufobj = array->BufferObj;

      stride = array->StrideB;

         const GLubyte *start;

         array = get_client_array(vp, arrays, attr);

         if (!array)

            continue;

         start = array->Ptr;

         low_addr = MIN2(low_addr, start);

      }

   }

   else {

      /* not sure we'll ever have zero inputs, but play it safe */

      bufobj = NULL;

      stride = 0;

      low_addr = 0;

   }

   usingVBO = _mesa_is_bufferobj(bufobj);

   for (attr = 0; attr < vpv->num_inputs; attr++) {

      const struct gl_client_array *array;

      unsigned src_offset;

      unsigned src_format;

      if (!array)

         continue;

      assert(array->_ElementSize ==

             _mesa_bytes_per_vertex_attrib(array->Size, array->Type));

                                         array->Size,

                                         array->Format,

                                         array->Normalized,

                                         array->Integer);

                            array->InstanceDivisor, 0,

                            array->Size, array->Doubles, &attr_idx);

   }

    * Return the vbuffer info and setup user-space attrib info, if needed.

    */

   if (vpv->num_inputs == 0) {

      /* just defensive coding here */

      vbuffer->buffer = NULL;

      vbuffer->user_buffer = NULL;

      vbuffer->buffer_offset = 0;

      vbuffer->stride = 0;

   }

   else if (usingVBO) {

      /* all interleaved arrays in a VBO */

      struct st_buffer_object *stobj = st_buffer_object(bufobj);

         return FALSE; /* out-of-memory error probably */

      }

      vbuffer->user_buffer = NULL;

      vbuffer->buffer_offset = pointer_to_offset(low_addr);

      vbuffer->stride = stride;

   }

   else {

      /* all interleaved arrays in user memory */

      vbuffer->buffer = NULL;

      vbuffer->user_buffer = low_addr;

      vbuffer->buffer_offset = 0;

      vbuffer->stride = stride;

   }

   return TRUE;

}

 * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each

 * vertex attribute.

 * \param vbuffer  returns vertex buffer info

 * \param velements  returns vertex element info

 */

static boolean

setup_non_interleaved_attribs(struct st_context *st,

                              const struct st_vertex_program *vp,

                              const struct st_vp_variant *vpv,

                              const struct gl_client_array **arrays,

                              struct pipe_vertex_buffer vbuffer[],

                              struct pipe_vertex_element velements[],

                              unsigned *num_velements)

{

   struct gl_context *ctx = st->ctx;

   GLuint attr, attr_idx = 0;

      const GLuint mesaAttr = vp->index_to_input[attr];

      const struct gl_client_array *array;

      struct gl_buffer_object *bufobj;

      GLsizei stride;

      unsigned src_format;

      if (!array)

         continue;

      bufobj = array->BufferObj;

      assert(array->_ElementSize ==

             _mesa_bytes_per_vertex_attrib(array->Size, array->Type));

         /* Attribute data is in a VBO.

          * Recall that for VBOs, the gl_client_array->Ptr field is

          * really an offset from the start of the VBO, not a pointer.

          */

         struct st_buffer_object *stobj = st_buffer_object(bufobj);

            return FALSE; /* out-of-memory error probably */

         }

         vbuffer[attr].user_buffer = NULL;

         vbuffer[attr].buffer_offset = pointer_to_offset(array->Ptr);

      }

      else {

         /* wrap user data */

         void *ptr;

            ptr = (void *) array->Ptr;

         }

         else {

            /* no array, use ctx->Current.Attrib[] value */

            ptr = (void *) ctx->Current.Attrib[mesaAttr];

            stride = 0;

         }

         vbuffer[attr].user_buffer = ptr;

         vbuffer[attr].buffer_offset = 0;

      }

      vbuffer[attr].stride = stride; /* in bytes */

                                         array->Size,

                                         array->Format,

                                         array->Normalized,

                                         array->Integer);

                            array->InstanceDivisor, attr,

                            array->Size, array->Doubles, &attr_idx);

   return TRUE;

}

{

   struct gl_context *ctx = st->ctx;

   const struct gl_client_array **arrays = ctx->Array._DrawArrays;

   const struct st_vertex_program *vp;

   const struct st_vp_variant *vpv;

   struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];

   struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];

   unsigned num_vbuffers, num_velements;

   if (!arrays)

      return;

   vp = st->vp;

   vpv = st->vp_variant;

    * Setup the vbuffer[] and velements[] arrays.

    */

   if (is_interleaved_arrays(vp, vpv, arrays)) {

      if (!setup_interleaved_attribs(st, vp, vpv, arrays, vbuffer, velements, &num_velements)) {

         st->vertex_array_out_of_memory = TRUE;

         return;

      }

      if (num_velements == 0)

         num_vbuffers = 0;

   }

   else {

      if (!setup_non_interleaved_attribs(st, vp, vpv, arrays, vbuffer,

                                         velements, &num_velements)) {

         st->vertex_array_out_of_memory = TRUE;

         return;

      }

   }

   if (st->last_num_vbuffers > num_vbuffers) {

      /* Unbind remaining buffers, if any. */

      cso_set_vertex_buffers(st->cso_context, num_vbuffers,

                             st->last_num_vbuffers - num_vbuffers, NULL);

   }

   st->last_num_vbuffers = num_vbuffers;

   cso_set_vertex_elements(st->cso_context, num_velements, velements);

}

   "st_update_array",					/* name */

   {							/* dirty */

      _NEW_CURRENT_ATTRIB,                              /* mesa */

      ST_NEW_VERTEX_ARRAYS | ST_NEW_VERTEX_PROGRAM,     /* st */

   },

   update_array						/* update */

};