st_draw.h File Reference

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Functions
void	st_init_draw (struct st_context *st)
void	st_destroy_draw (struct st_context *st)
void	st_draw_vbo (GLcontext *ctx, const struct gl_client_array **arrays, const struct _mesa_prim *prims, GLuint nr_prims, const struct _mesa_index_buffer *ib, GLuint min_index, GLuint max_index)
	This function gets plugged into the VBO module and is called when we have something to render.
void	st_feedback_draw_vbo (GLcontext *ctx, const struct gl_client_array **arrays, const struct _mesa_prim *prims, GLuint nr_prims, const struct _mesa_index_buffer *ib, GLuint min_index, GLuint max_index)
GLuint	st_pipe_vertex_format (GLenum type, GLuint size, GLboolean normalized)
	Return a PIPE_FORMAT_x for the given GL datatype and size.

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Function Documentation

void st_destroy_draw

(

struct st_context *

st

)

Definition at line 693 of file st_draw.c.

{
}

void st_draw_vbo	(	GLcontext *	ctx,
		const struct gl_client_array **	arrays,
		const struct _mesa_prim *	prims,
		GLuint	nr_prims,
		const struct _mesa_index_buffer *	ib,
		GLuint	min_index,
		GLuint	max_index
	)

This function gets plugged into the VBO module and is called when we have something to render.

Basically, translate the information into the format expected by gallium.

Definition at line 518 of file st_draw.c.

References assert, pipe_vertex_buffer::buffer, st_buffer_object::buffer, check_uniforms(), pipe_context::draw_arrays, pipe_context::draw_elements, pipe_context::draw_range_elements, is_interleaved_arrays(), mode, pipe_vertex_element::nr_components, st_vertex_program::num_inputs, pf_name(), pipe_buffer_reference(), pipe_user_buffer_create(), pipe_context::screen, pipe_context::set_vertex_buffers, pipe_context::set_vertex_elements, setup_edgeflags(), setup_interleaved_attribs(), setup_non_interleaved_attribs(), pipe_vertex_element::src_format, pipe_vertex_element::src_offset, st_buffer_object(), st_validate_state(), and pipe_vertex_element::vertex_buffer_index.

{
   struct pipe_context *pipe = ctx->st->pipe;
   const struct st_vertex_program *vp;
   const struct pipe_shader_state *vs;
   struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
   GLuint attr;
   struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
   unsigned num_vbuffers, num_velements;
   GLboolean userSpace;

   /* sanity check for pointer arithmetic below */
   assert(sizeof(arrays[0]->Ptr[0]) == 1);

   st_validate_state(ctx->st);

   /* must get these after state validation! */
   vp = ctx->st->vp;
   vs = &ctx->st->vp->state;

   if (MESA_VERBOSE & VERBOSE_GLSL) {
      check_uniforms(ctx);
   }

   /*
    * Setup the vbuffer[] and velements[] arrays.
    */
   if (is_interleaved_arrays(vp, arrays, &userSpace)) {
      /*printf("Draw interleaved\n");*/
      setup_interleaved_attribs(ctx, vp, arrays, max_index, userSpace,
                                vbuffer, velements);
      num_vbuffers = 1;
      num_velements = vp->num_inputs;
      if (num_velements == 0)
         num_vbuffers = 0;
   }
   else {
      /*printf("Draw non-interleaved\n");*/
      setup_non_interleaved_attribs(ctx, vp, arrays, max_index,
                                    &userSpace, vbuffer, velements);
      num_vbuffers = vp->num_inputs;
      num_velements = vp->num_inputs;
   }

#if 0
   {
      GLuint i;
      for (i = 0; i < num_vbuffers; i++) {
         printf("buffers[%d].pitch = %u\n", i, vbuffer[i].pitch);
         printf("buffers[%d].max_index = %u\n", i, vbuffer[i].max_index);
         printf("buffers[%d].buffer_offset = %u\n", i, vbuffer[i].buffer_offset);
         printf("buffers[%d].buffer = %p\n", i, (void*) vbuffer[i].buffer);
      }
      for (i = 0; i < num_velements; i++) {
         printf("vlements[%d].vbuffer_index = %u\n", i, velements[i].vertex_buffer_index);
         printf("vlements[%d].src_offset = %u\n", i, velements[i].src_offset);
         printf("vlements[%d].nr_comps = %u\n", i, velements[i].nr_components);
         printf("vlements[%d].format = %s\n", i, pf_name(velements[i].src_format));
      }
   }
#endif

   pipe->set_vertex_buffers(pipe, num_vbuffers, vbuffer);
   pipe->set_vertex_elements(pipe, num_velements, velements);

   if (num_vbuffers == 0 || num_velements == 0)
      return;

   /* do actual drawing */
   if (ib) {
      /* indexed primitive */
      struct gl_buffer_object *bufobj = ib->obj;
      struct pipe_buffer *indexBuf = NULL;
      unsigned indexSize, indexOffset, i;

      switch (ib->type) {
      case GL_UNSIGNED_INT:
         indexSize = 4;
         break;
      case GL_UNSIGNED_SHORT:
         indexSize = 2;
         break;
      case GL_UNSIGNED_BYTE:
         indexSize = 1;
         break;
      default:
         assert(0);
         return;
      }

      /* get/create the index buffer object */
      if (bufobj && bufobj->Name) {
         /* elements/indexes are in a real VBO */
         struct st_buffer_object *stobj = st_buffer_object(bufobj);
         pipe_buffer_reference(pipe->screen, &indexBuf, stobj->buffer);
         indexOffset = (unsigned) ib->ptr / indexSize;
      }
      else {
         /* element/indicies are in user space memory */
         indexBuf = pipe_user_buffer_create(pipe->screen, (void *) ib->ptr,
                                            ib->count * indexSize);
         indexOffset = 0;
      }

      /* draw */
      if (nr_prims == 1 && pipe->draw_range_elements != NULL) {
         i = 0;

         /* XXX: exercise temporary path to pass min/max directly
          * through to driver & draw module.  These interfaces still
          * need a bit of work...
          */
         setup_edgeflags(ctx, prims[i].mode,
                         prims[i].start + indexOffset, prims[i].count,
                         arrays[VERT_ATTRIB_EDGEFLAG]);

         pipe->draw_range_elements(pipe, indexBuf, indexSize,
                                   min_index,
                                   max_index,
                                   prims[i].mode,
                                   prims[i].start + indexOffset, prims[i].count);
      }
      else {
         for (i = 0; i < nr_prims; i++) {
            setup_edgeflags(ctx, prims[i].mode,
                            prims[i].start + indexOffset, prims[i].count,
                            arrays[VERT_ATTRIB_EDGEFLAG]);
            
            pipe->draw_elements(pipe, indexBuf, indexSize,
                                prims[i].mode,
                                prims[i].start + indexOffset, prims[i].count);
         }
      }

      pipe_buffer_reference(pipe->screen, &indexBuf, NULL);
   }
   else {
      /* non-indexed */
      GLuint i;
      for (i = 0; i < nr_prims; i++) {
         setup_edgeflags(ctx, prims[i].mode,
                         prims[i].start, prims[i].count,
                         arrays[VERT_ATTRIB_EDGEFLAG]);

         pipe->draw_arrays(pipe, prims[i].mode, prims[i].start, prims[i].count);
      }
   }

   /* unreference buffers (frees wrapped user-space buffer objects) */
   for (attr = 0; attr < num_vbuffers; attr++) {
      pipe_buffer_reference(pipe->screen, &vbuffer[attr].buffer, NULL);
      assert(!vbuffer[attr].buffer);
   }

   if (userSpace) 
   {
      pipe->set_vertex_buffers(pipe, 0, NULL);
   }
}

void st_feedback_draw_vbo	(	GLcontext *	ctx,
		const struct gl_client_array **	arrays,
		const struct _mesa_prim *	prims,
		GLuint	nr_prims,
		const struct _mesa_index_buffer *	ib,
		GLuint	min_index,
		GLuint	max_index
	)

void st_init_draw

(

struct st_context *

st

)

Definition at line 685 of file st_draw.c.

References st_context::ctx, and st_draw_vbo().

{
   GLcontext *ctx = st->ctx;

   vbo_set_draw_func(ctx, st_draw_vbo);
}

GLuint st_pipe_vertex_format	(	GLenum	type,
		GLuint	size,
		GLboolean	normalized
	)

Return a PIPE_FORMAT_x for the given GL datatype and size.

Definition at line 162 of file st_draw.c.

References assert, byte_types_norm, byte_types_scale, double_types, fixed_types, float_types, int_types_norm, int_types_scale, short_types_norm, short_types_scale, ubyte_types_norm, ubyte_types_scale, uint_types_norm, uint_types_scale, ushort_types_norm, and ushort_types_scale.

{
   assert((type >= GL_BYTE && type <= GL_DOUBLE) ||
          type == GL_FIXED);
   assert(size >= 1);
   assert(size <= 4);

   if (normalized) {
      switch (type) {
      case GL_DOUBLE: return double_types[size-1];
      case GL_FLOAT: return 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_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 0; /* silence compiler warning */
}

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