1 /**************************************************************************
3 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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 TUNGSTEN GRAPHICS 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.
26 **************************************************************************/
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"
37 * Draw a simple vertex buffer / primitive.
38 * Limited to float[4] vertex attribs, tightly packed.
41 util_draw_vertex_buffer(struct pipe_context *pipe,
42 struct pipe_resource *vbuf,
48 struct pipe_vertex_buffer vbuffer;
50 assert(num_attribs <= PIPE_MAX_ATTRIBS);
52 /* tell pipe about the vertex buffer */
53 memset(&vbuffer, 0, sizeof(vbuffer));
54 vbuffer.buffer = vbuf;
55 vbuffer.stride = num_attribs * 4 * sizeof(float); /* vertex size */
56 vbuffer.buffer_offset = offset;
57 vbuffer.max_index = num_verts - 1;
58 pipe->set_vertex_buffers(pipe, 1, &vbuffer);
60 /* note: vertex elements already set by caller */
63 pipe->draw_arrays(pipe, prim_type, 0, num_verts);
69 * Draw screen-aligned textured quad.
70 * Note: this isn't especially efficient.
73 util_draw_texquad(struct pipe_context *pipe,
74 float x0, float y0, float x1, float y1, float z)
76 uint numAttribs = 2, i, j;
77 uint vertexBytes = 4 * (4 * numAttribs * sizeof(float));
78 struct pipe_resource *vbuf = NULL;
81 v = MALLOC(vertexBytes);
88 for (i = j = 0; i < 4; i++) {
90 v[j + 3] = 1.0; /* w */
91 v[j + 6] = 0.0; /* r */
92 v[j + 7] = 1.0; /* q */
116 vbuf = pipe_user_buffer_create(pipe->screen, v, vertexBytes,
117 PIPE_BIND_VERTEX_BUFFER);
121 util_draw_vertex_buffer(pipe, vbuf, 0, PIPE_PRIM_TRIANGLE_FAN, 4, 2);
125 pipe_resource_reference(&vbuf, NULL);