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 = 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.user_buffer = buffer; 86 vbuffer.stride = num_attribs * 4 * sizeof(float); /* vertex size */ 87 88 /* note: vertex elements already set by caller */ 89 90 cso_set_vertex_buffers(cso, 0, 1, &vbuffer); 91 cso_draw_arrays(cso, prim_type, 0, num_verts); 92 } 93 94 95 /** 96 * Draw screen-aligned textured quad. 97 * Note: this isn't especially efficient. 98 */ 99 void 100 util_draw_texquad(struct pipe_context *pipe, struct cso_context *cso, 101 uint vbuf_slot, 102 float x0, float y0, float x1, float y1, float z) 103 { 104 uint numAttribs = 2, i, j; 105 uint vertexBytes = 4 * (4 * numAttribs * sizeof(float)); 106 struct pipe_resource *vbuf = NULL; 107 float *v = NULL; 108 109 v = MALLOC(vertexBytes); 110 if (!v) 111 goto out; 112 113 /* 114 * Load vertex buffer 115 */ 116 for (i = j = 0; i < 4; i++) { 117 v[j + 2] = z; /* z */ 118 v[j + 3] = 1.0; /* w */ 119 v[j + 6] = 0.0; /* r */ 120 v[j + 7] = 1.0; /* q */ 121 j += 8; 122 } 123 124 v[0] = x0; 125 v[1] = y0; 126 v[4] = 0.0; /*s*/ 127 v[5] = 0.0; /*t*/ 128 129 v[8] = x1; 130 v[9] = y0; 131 v[12] = 1.0; 132 v[13] = 0.0; 133 134 v[16] = x1; 135 v[17] = y1; 136 v[20] = 1.0; 137 v[21] = 1.0; 138 139 v[24] = x0; 140 v[25] = y1; 141 v[28] = 0.0; 142 v[29] = 1.0; 143 144 vbuf = pipe_buffer_create(pipe->screen, PIPE_BIND_VERTEX_BUFFER, 145 PIPE_USAGE_STAGING, vertexBytes); 146 if (!vbuf) 147 goto out; 148 pipe_buffer_write(pipe, vbuf, 0, vertexBytes, v); 149 150 util_draw_vertex_buffer(pipe, cso, vbuf, vbuf_slot, 0, 151 PIPE_PRIM_TRIANGLE_FAN, 4, 2); 152 153 out: 154 if (vbuf) 155 pipe_resource_reference(&vbuf, NULL); 156 157 FREE(v); 158 } 159