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      1 /**************************************************************************
      2  *
      3  * Copyright 2008 VMware, Inc.
      4  * 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
      8  * "Software"), to deal in the Software without restriction, including
      9  * without limitation the rights to use, copy, modify, merge, publish,
     10  * distribute, sub license, and/or sell copies of the Software, and to
     11  * permit persons to whom the Software is furnished to do so, subject to
     12  * the following conditions:
     13  *
     14  * The above copyright notice and this permission notice (including the
     15  * next paragraph) shall be included in all copies or substantial portions
     16  * of the Software.
     17  *
     18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
     21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
     22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
     24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     25  *
     26  **************************************************************************/
     27 
     28 
     29 #include "pipe/p_context.h"
     30 #include "pipe/p_defines.h"
     31 #include "util/u_inlines.h"
     32 #include "util/u_draw_quad.h"
     33 #include "util/u_memory.h"
     34 #include "cso_cache/cso_context.h"
     35 
     36 
     37 /**
     38  * Draw a simple vertex buffer / primitive.
     39  * Limited to float[4] vertex attribs, tightly packed.
     40  */
     41 void
     42 util_draw_vertex_buffer(struct pipe_context *pipe,
     43                         struct cso_context *cso,
     44                         struct pipe_resource *vbuf,
     45                         uint vbuf_slot,
     46                         uint offset,
     47                         uint prim_type,
     48                         uint num_verts,
     49                         uint num_attribs)
     50 {
     51    struct pipe_vertex_buffer vbuffer;
     52 
     53    assert(num_attribs <= PIPE_MAX_ATTRIBS);
     54 
     55    /* tell pipe about the vertex buffer */
     56    memset(&vbuffer, 0, sizeof(vbuffer));
     57    vbuffer.buffer.resource = vbuf;
     58    vbuffer.stride = num_attribs * 4 * sizeof(float);  /* vertex size */
     59    vbuffer.buffer_offset = offset;
     60 
     61    /* note: vertex elements already set by caller */
     62 
     63    if (cso) {
     64       cso_set_vertex_buffers(cso, vbuf_slot, 1, &vbuffer);
     65       cso_draw_arrays(cso, prim_type, 0, num_verts);
     66    } else {
     67       pipe->set_vertex_buffers(pipe, vbuf_slot, 1, &vbuffer);
     68       util_draw_arrays(pipe, prim_type, 0, num_verts);
     69    }
     70 }
     71 
     72 
     73 /**
     74  * Draw a simple vertex buffer / primitive.
     75  * Limited to float[4] vertex attribs, tightly packed.
     76  */
     77 void
     78 util_draw_user_vertex_buffer(struct cso_context *cso, void *buffer,
     79                              uint prim_type, uint num_verts, uint num_attribs)
     80 {
     81    struct pipe_vertex_buffer vbuffer = {0};
     82 
     83    assert(num_attribs <= PIPE_MAX_ATTRIBS);
     84 
     85    vbuffer.is_user_buffer = true;
     86    vbuffer.buffer.user = buffer;
     87    vbuffer.stride = num_attribs * 4 * sizeof(float);  /* vertex size */
     88 
     89    /* note: vertex elements already set by caller */
     90 
     91    cso_set_vertex_buffers(cso, 0, 1, &vbuffer);
     92    cso_draw_arrays(cso, prim_type, 0, num_verts);
     93 }
     94