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| Rev | Author | Line No. | Line |
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| 4358 | Serge | 1 | /************************************************************************** |
| 2 | * |
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| 3 | * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas. |
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| 4 | * All Rights Reserved. |
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| 5 | * |
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 7 | * copy of this software and associated documentation files (the |
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| 8 | * "Software"), to deal in the Software without restriction, including |
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| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
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| 10 | * distribute, sub license, and/or sell copies of the Software, and to |
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| 11 | * permit persons to whom the Software is furnished to do so, subject to |
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| 12 | * the following conditions: |
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| 13 | * |
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| 14 | * The above copyright notice and this permission notice (including the |
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| 15 | * next paragraph) shall be included in all copies or substantial portions |
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| 16 | * of the Software. |
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| 17 | * |
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| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 19 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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| 20 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
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| 21 | * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR |
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| 22 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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| 23 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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| 24 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 25 | * |
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| 26 | **************************************************************************/ |
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| 27 | |||
| 28 | |||
| 29 | #include "pipe/p_context.h" |
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| 30 | #include "pipe/p_defines.h" |
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| 31 | #include "util/u_inlines.h" |
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| 32 | #include "util/u_draw_quad.h" |
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| 33 | #include "util/u_memory.h" |
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| 34 | #include "cso_cache/cso_context.h" |
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| 35 | |||
| 36 | |||
| 37 | /** |
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| 38 | * Draw a simple vertex buffer / primitive. |
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| 39 | * Limited to float[4] vertex attribs, tightly packed. |
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| 40 | */ |
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| 41 | void |
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| 42 | util_draw_vertex_buffer(struct pipe_context *pipe, |
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| 43 | struct cso_context *cso, |
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| 44 | struct pipe_resource *vbuf, |
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| 45 | uint vbuf_slot, |
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| 46 | uint offset, |
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| 47 | uint prim_type, |
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| 48 | uint num_verts, |
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| 49 | uint num_attribs) |
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| 50 | { |
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| 51 | struct pipe_vertex_buffer vbuffer; |
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| 52 | |||
| 53 | assert(num_attribs <= PIPE_MAX_ATTRIBS); |
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| 54 | |||
| 55 | /* tell pipe about the vertex buffer */ |
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| 56 | memset(&vbuffer, 0, sizeof(vbuffer)); |
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| 57 | vbuffer.buffer = vbuf; |
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| 58 | vbuffer.stride = num_attribs * 4 * sizeof(float); /* vertex size */ |
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| 59 | vbuffer.buffer_offset = offset; |
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| 60 | |||
| 61 | /* note: vertex elements already set by caller */ |
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| 62 | |||
| 63 | if (cso) { |
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| 64 | cso_set_vertex_buffers(cso, vbuf_slot, 1, &vbuffer); |
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| 65 | cso_draw_arrays(cso, prim_type, 0, num_verts); |
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| 66 | } else { |
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| 67 | pipe->set_vertex_buffers(pipe, vbuf_slot, 1, &vbuffer); |
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| 68 | util_draw_arrays(pipe, prim_type, 0, num_verts); |
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| 69 | } |
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| 70 | } |
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| 71 | |||
| 72 | |||
| 73 | /** |
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| 74 | * Draw a simple vertex buffer / primitive. |
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| 75 | * Limited to float[4] vertex attribs, tightly packed. |
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| 76 | */ |
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| 77 | void |
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| 78 | util_draw_user_vertex_buffer(struct cso_context *cso, void *buffer, |
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| 79 | uint prim_type, uint num_verts, uint num_attribs) |
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| 80 | { |
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| 81 | struct pipe_vertex_buffer vbuffer = {0}; |
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| 82 | |||
| 83 | assert(num_attribs <= PIPE_MAX_ATTRIBS); |
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| 84 | |||
| 85 | vbuffer.user_buffer = buffer; |
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| 86 | vbuffer.stride = num_attribs * 4 * sizeof(float); /* vertex size */ |
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| 87 | |||
| 88 | /* note: vertex elements already set by caller */ |
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| 89 | |||
| 90 | cso_set_vertex_buffers(cso, 0, 1, &vbuffer); |
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| 91 | cso_draw_arrays(cso, prim_type, 0, num_verts); |
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| 92 | } |
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| 93 | |||
| 94 | |||
| 95 | /** |
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| 96 | * Draw screen-aligned textured quad. |
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| 97 | * Note: this isn't especially efficient. |
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| 98 | */ |
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| 99 | void |
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| 100 | util_draw_texquad(struct pipe_context *pipe, struct cso_context *cso, |
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| 101 | uint vbuf_slot, |
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| 102 | float x0, float y0, float x1, float y1, float z) |
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| 103 | { |
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| 104 | uint numAttribs = 2, i, j; |
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| 105 | uint vertexBytes = 4 * (4 * numAttribs * sizeof(float)); |
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| 106 | struct pipe_resource *vbuf = NULL; |
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| 107 | float *v = NULL; |
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| 108 | |||
| 109 | v = MALLOC(vertexBytes); |
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| 110 | if (v == NULL) |
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| 111 | goto out; |
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| 112 | |||
| 113 | /* |
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| 114 | * Load vertex buffer |
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| 115 | */ |
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| 116 | for (i = j = 0; i < 4; i++) { |
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| 117 | v[j + 2] = z; /* z */ |
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| 118 | v[j + 3] = 1.0; /* w */ |
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| 119 | v[j + 6] = 0.0; /* r */ |
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| 120 | v[j + 7] = 1.0; /* q */ |
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| 121 | j += 8; |
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| 122 | } |
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| 123 | |||
| 124 | v[0] = x0; |
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| 125 | v[1] = y0; |
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| 126 | v[4] = 0.0; /*s*/ |
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| 127 | v[5] = 0.0; /*t*/ |
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| 128 | |||
| 129 | v[8] = x1; |
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| 130 | v[9] = y0; |
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| 131 | v[12] = 1.0; |
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| 132 | v[13] = 0.0; |
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| 133 | |||
| 134 | v[16] = x1; |
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| 135 | v[17] = y1; |
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| 136 | v[20] = 1.0; |
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| 137 | v[21] = 1.0; |
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| 138 | |||
| 139 | v[24] = x0; |
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| 140 | v[25] = y1; |
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| 141 | v[28] = 0.0; |
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| 142 | v[29] = 1.0; |
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| 143 | |||
| 144 | vbuf = pipe_buffer_create(pipe->screen, PIPE_BIND_VERTEX_BUFFER, |
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| 145 | PIPE_USAGE_STAGING, vertexBytes); |
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| 146 | if (!vbuf) |
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| 147 | goto out; |
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| 148 | pipe_buffer_write(pipe, vbuf, 0, vertexBytes, v); |
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| 149 | |||
| 150 | util_draw_vertex_buffer(pipe, cso, vbuf, vbuf_slot, 0, |
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| 151 | PIPE_PRIM_TRIANGLE_FAN, 4, 2); |
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| 152 | |||
| 153 | out: |
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| 154 | if (vbuf) |
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| 155 | pipe_resource_reference(&vbuf, NULL); |
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| 156 | |||
| 157 | FREE(v); |
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| 158 | } |