filename | src/drivers/gl_vbo.c |
changeset | 1164:01b45ca393c6 |
prev | 1160:219d05b638de |
next | 1289:ef8b0ddb8185 |
author | nkeynes |
date | Sat Mar 03 16:11:28 2012 +1000 (12 years ago) |
permissions | -rw-r--r-- |
last change | Support depth component 16 as well as 24 (add capability flag for the available bits) Put remaining TODOs inside HAVE_OPENGL_FIXEDFUNC blocks Add swap-buffer calls for EGL (does not appear to support rendering directly to front-buffer) |
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nkeynes@1160 | 1 | /** |
nkeynes@1160 | 2 | * $Id$ |
nkeynes@1160 | 3 | * |
nkeynes@1160 | 4 | * Generic GL vertex buffer/vertex array support |
nkeynes@1160 | 5 | * |
nkeynes@1160 | 6 | * Copyright (c) 2011 Nathan Keynes. |
nkeynes@1160 | 7 | * |
nkeynes@1160 | 8 | * This program is free software; you can redistribute it and/or modify |
nkeynes@1160 | 9 | * it under the terms of the GNU General Public License as published by |
nkeynes@1160 | 10 | * the Free Software Foundation; either version 2 of the License, or |
nkeynes@1160 | 11 | * (at your option) any later version. |
nkeynes@1160 | 12 | * |
nkeynes@1160 | 13 | * This program is distributed in the hope that it will be useful, |
nkeynes@1160 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
nkeynes@1160 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
nkeynes@1160 | 16 | * GNU General Public License for more details. |
nkeynes@1160 | 17 | */ |
nkeynes@1160 | 18 | |
nkeynes@1160 | 19 | #define GL_GLEXT_PROTOTYPES 1 |
nkeynes@1160 | 20 | |
nkeynes@1160 | 21 | #include <assert.h> |
nkeynes@1160 | 22 | #include <stdlib.h> |
nkeynes@1160 | 23 | #include <sys/mman.h> |
nkeynes@1160 | 24 | #include "lxdream.h" |
nkeynes@1160 | 25 | #include "display.h" |
nkeynes@1160 | 26 | #include "drivers/video_gl.h" |
nkeynes@1160 | 27 | #include "pvr2/glutil.h" |
nkeynes@1160 | 28 | |
nkeynes@1160 | 29 | #define MIN_VERTEX_ARRAY_SIZE (1024*1024) |
nkeynes@1160 | 30 | |
nkeynes@1160 | 31 | vertex_buffer_t vertex_buffer_new( vertex_buffer_t vtable ) |
nkeynes@1160 | 32 | { |
nkeynes@1160 | 33 | vertex_buffer_t buf = g_malloc(sizeof(struct vertex_buffer)); |
nkeynes@1160 | 34 | memcpy( buf, vtable, sizeof(struct vertex_buffer)); |
nkeynes@1160 | 35 | buf->data = 0; |
nkeynes@1160 | 36 | buf->id = 0; |
nkeynes@1160 | 37 | buf->mapped_size = buf->capacity = 0; |
nkeynes@1160 | 38 | buf->fence = 0; |
nkeynes@1160 | 39 | return buf; |
nkeynes@1160 | 40 | } |
nkeynes@1160 | 41 | |
nkeynes@1160 | 42 | /******************************* Default ***********************************/ |
nkeynes@1160 | 43 | |
nkeynes@1160 | 44 | static void *def_map( vertex_buffer_t buf, uint32_t size ) |
nkeynes@1160 | 45 | { |
nkeynes@1160 | 46 | buf->mapped_size = size; |
nkeynes@1160 | 47 | if( size < MIN_VERTEX_ARRAY_SIZE ) |
nkeynes@1160 | 48 | size = MIN_VERTEX_ARRAY_SIZE; |
nkeynes@1160 | 49 | if( size > buf->capacity ) { |
nkeynes@1160 | 50 | g_free(buf->data); |
nkeynes@1160 | 51 | buf->data = g_malloc(size); |
nkeynes@1160 | 52 | buf->capacity = size; |
nkeynes@1160 | 53 | } |
nkeynes@1160 | 54 | return buf->data; |
nkeynes@1160 | 55 | } |
nkeynes@1160 | 56 | |
nkeynes@1160 | 57 | static void *def_unmap( vertex_buffer_t buf ) |
nkeynes@1160 | 58 | { |
nkeynes@1160 | 59 | return buf->data; |
nkeynes@1160 | 60 | } |
nkeynes@1160 | 61 | |
nkeynes@1160 | 62 | static void def_finished( vertex_buffer_t buf ) |
nkeynes@1160 | 63 | { |
nkeynes@1160 | 64 | } |
nkeynes@1160 | 65 | |
nkeynes@1160 | 66 | static void def_destroy( vertex_buffer_t buf ) |
nkeynes@1160 | 67 | { |
nkeynes@1160 | 68 | g_free(buf->data); |
nkeynes@1160 | 69 | buf->data = NULL; |
nkeynes@1160 | 70 | g_free(buf); |
nkeynes@1160 | 71 | } |
nkeynes@1160 | 72 | |
nkeynes@1160 | 73 | static struct vertex_buffer def_vtable = { def_map, def_unmap, def_finished, def_destroy }; |
nkeynes@1160 | 74 | |
nkeynes@1160 | 75 | static vertex_buffer_t def_create_buffer( ) |
nkeynes@1160 | 76 | { |
nkeynes@1160 | 77 | return vertex_buffer_new( &def_vtable ); |
nkeynes@1160 | 78 | } |
nkeynes@1160 | 79 | |
nkeynes@1160 | 80 | /************************** vertex_array_range *****************************/ |
nkeynes@1160 | 81 | |
nkeynes@1160 | 82 | /** |
nkeynes@1160 | 83 | * VAR extensions like the buffer to be allocated on page boundaries. |
nkeynes@1160 | 84 | */ |
nkeynes@1160 | 85 | static void var_alloc_pages( vertex_buffer_t buf, uint32_t size ) |
nkeynes@1160 | 86 | { |
nkeynes@1160 | 87 | if( size < MIN_VERTEX_ARRAY_SIZE ) |
nkeynes@1160 | 88 | size = MIN_VERTEX_ARRAY_SIZE; |
nkeynes@1160 | 89 | if( size > buf->capacity ) { |
nkeynes@1160 | 90 | size = (size + 4096-1) & (~(4096-1)); |
nkeynes@1160 | 91 | if( buf->data != NULL ) { |
nkeynes@1160 | 92 | munmap( buf->data, buf->capacity ); |
nkeynes@1160 | 93 | } |
nkeynes@1160 | 94 | buf->data = mmap( NULL, size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0 ); |
nkeynes@1160 | 95 | assert( buf->data != MAP_FAILED ); |
nkeynes@1160 | 96 | buf->capacity = size; |
nkeynes@1160 | 97 | } |
nkeynes@1160 | 98 | } |
nkeynes@1160 | 99 | |
nkeynes@1160 | 100 | #ifdef APPLE_BUILD |
nkeynes@1160 | 101 | |
nkeynes@1160 | 102 | static void *apple_map( vertex_buffer_t buf, uint32_t size ) |
nkeynes@1160 | 103 | { |
nkeynes@1160 | 104 | glFinishFenceAPPLE(buf->fence); |
nkeynes@1160 | 105 | var_alloc_pages( buf, size ); |
nkeynes@1160 | 106 | glVertexArrayRangeAPPLE(size, buf->data); |
nkeynes@1160 | 107 | buf->mapped_size = size; |
nkeynes@1160 | 108 | return buf->data; |
nkeynes@1160 | 109 | } |
nkeynes@1160 | 110 | |
nkeynes@1160 | 111 | static void *apple_unmap( vertex_buffer_t buf ) |
nkeynes@1160 | 112 | { |
nkeynes@1160 | 113 | glFlushVertexArrayRangeAPPLE(buf->mapped_size, buf->data); |
nkeynes@1160 | 114 | return buf->data; |
nkeynes@1160 | 115 | } |
nkeynes@1160 | 116 | |
nkeynes@1160 | 117 | static void apple_finished( vertex_buffer_t buf ) |
nkeynes@1160 | 118 | { |
nkeynes@1160 | 119 | glSetFenceAPPLE(buf->fence); |
nkeynes@1160 | 120 | } |
nkeynes@1160 | 121 | |
nkeynes@1160 | 122 | static void apple_destroy( vertex_buffer_t buf ) |
nkeynes@1160 | 123 | { |
nkeynes@1160 | 124 | glVertexArrayRangeAPPLE(0,0); |
nkeynes@1160 | 125 | glDeleteFencesAPPLE(1, &buf->fence); |
nkeynes@1160 | 126 | munmap( buf->data, buf->capacity ); |
nkeynes@1160 | 127 | g_free(buf); |
nkeynes@1160 | 128 | } |
nkeynes@1160 | 129 | static struct vertex_buffer apple_vtable = { apple_map, apple_unmap, apple_finished, apple_destroy }; |
nkeynes@1160 | 130 | |
nkeynes@1160 | 131 | static vertex_buffer_t apple_create_buffer( uint32_t size ) |
nkeynes@1160 | 132 | { |
nkeynes@1160 | 133 | vertex_buffer_t buf = vertex_buffer_new( &apple_vtable ); |
nkeynes@1160 | 134 | glGenFencesAPPLE(1, &buf->fence); |
nkeynes@1164 | 135 | glSetFenceAPPLE(buf->fence); |
nkeynes@1160 | 136 | return buf; |
nkeynes@1160 | 137 | } |
nkeynes@1160 | 138 | |
nkeynes@1160 | 139 | #endif |
nkeynes@1160 | 140 | |
nkeynes@1160 | 141 | #ifdef GL_VERTEX_ARRAY_RANGE_NV |
nkeynes@1160 | 142 | |
nkeynes@1164 | 143 | #pragma weak glVertexArrayRangeNV |
nkeynes@1164 | 144 | #pragma weak glFlushVertexArrayRangeNV |
nkeynes@1164 | 145 | #pragma weak glFinishFenceNV |
nkeynes@1164 | 146 | #pragma weak glSetFenceNV |
nkeynes@1164 | 147 | #pragma weak glGenFencesNV |
nkeynes@1164 | 148 | #pragma weak glDeleteFencesNV |
nkeynes@1164 | 149 | |
nkeynes@1160 | 150 | static void *nv_map( vertex_buffer_t buf, uint32_t size ) |
nkeynes@1160 | 151 | { |
nkeynes@1160 | 152 | glFinishFenceNV(buf->fence); |
nkeynes@1160 | 153 | var_alloc_pages( buf, size ); |
nkeynes@1160 | 154 | glVertexArrayRangeNV(size, buf->data); |
nkeynes@1160 | 155 | buf->mapped_size = size; |
nkeynes@1160 | 156 | return buf->data; |
nkeynes@1160 | 157 | } |
nkeynes@1160 | 158 | static void *nv_unmap( vertex_buffer_t buf ) |
nkeynes@1160 | 159 | { |
nkeynes@1160 | 160 | glFlushVertexArrayRangeNV(); |
nkeynes@1160 | 161 | return buf->data; |
nkeynes@1160 | 162 | } |
nkeynes@1160 | 163 | |
nkeynes@1160 | 164 | static void nv_finished( vertex_buffer_t buf ) |
nkeynes@1160 | 165 | { |
nkeynes@1160 | 166 | glSetFenceNV(buf->fence, GL_ALL_COMPLETED_NV); |
nkeynes@1160 | 167 | } |
nkeynes@1160 | 168 | |
nkeynes@1160 | 169 | static void nv_destroy( vertex_buffer_t buf ) |
nkeynes@1160 | 170 | { |
nkeynes@1160 | 171 | glVertexArrayRangeNV(0,0); |
nkeynes@1160 | 172 | glDeleteFencesNV(1, &buf->fence); |
nkeynes@1160 | 173 | munmap( buf->data, buf->capacity ); |
nkeynes@1160 | 174 | g_free(buf); |
nkeynes@1160 | 175 | } |
nkeynes@1160 | 176 | |
nkeynes@1160 | 177 | static struct vertex_buffer nv_vtable = { nv_map, nv_unmap, nv_finished, nv_destroy }; |
nkeynes@1160 | 178 | |
nkeynes@1160 | 179 | static vertex_buffer_t nv_create_buffer( uint32_t size ) |
nkeynes@1160 | 180 | { |
nkeynes@1160 | 181 | vertex_buffer_t buf = vertex_buffer_new( &nv_vtable ); |
nkeynes@1160 | 182 | glGenFencesNV(1, &buf->fence); |
nkeynes@1164 | 183 | glSetFenceNV(buf->fence, GL_ALL_COMPLETED_NV); |
nkeynes@1160 | 184 | return buf; |
nkeynes@1160 | 185 | } |
nkeynes@1160 | 186 | |
nkeynes@1160 | 187 | #endif /* !GL_VERTEX_ARRAY_RANGE_NV */ |
nkeynes@1160 | 188 | |
nkeynes@1160 | 189 | /************************** vertex_buffer_object *****************************/ |
nkeynes@1160 | 190 | |
nkeynes@1160 | 191 | #ifdef GL_ARRAY_BUFFER_ARB |
nkeynes@1160 | 192 | |
nkeynes@1160 | 193 | static void *vbo_map( vertex_buffer_t buf, uint32_t size ) |
nkeynes@1160 | 194 | { |
nkeynes@1160 | 195 | glBindBufferARB( GL_ARRAY_BUFFER_ARB, buf->id ); |
nkeynes@1160 | 196 | if( size > buf->capacity ) { |
nkeynes@1160 | 197 | glBufferDataARB( GL_ARRAY_BUFFER_ARB, size, NULL, GL_STREAM_DRAW_ARB ); |
nkeynes@1160 | 198 | assert( gl_check_error("Allocating vbo data") ); |
nkeynes@1160 | 199 | buf->capacity = size; |
nkeynes@1160 | 200 | } |
nkeynes@1160 | 201 | buf->data = glMapBufferARB( GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB ); |
nkeynes@1160 | 202 | buf->mapped_size = buf->capacity; |
nkeynes@1160 | 203 | return buf->data; |
nkeynes@1160 | 204 | } |
nkeynes@1160 | 205 | |
nkeynes@1160 | 206 | static void *vbo_unmap( vertex_buffer_t buf ) |
nkeynes@1160 | 207 | { |
nkeynes@1160 | 208 | glUnmapBufferARB( GL_ARRAY_BUFFER_ARB ); |
nkeynes@1160 | 209 | return NULL; |
nkeynes@1160 | 210 | } |
nkeynes@1160 | 211 | |
nkeynes@1160 | 212 | static void vbo_finished( vertex_buffer_t buf ) |
nkeynes@1160 | 213 | { |
nkeynes@1160 | 214 | glBindBufferARB( GL_ARRAY_BUFFER_ARB, 0 ); |
nkeynes@1160 | 215 | } |
nkeynes@1160 | 216 | |
nkeynes@1160 | 217 | static void vbo_destroy( vertex_buffer_t buf ) |
nkeynes@1160 | 218 | { |
nkeynes@1160 | 219 | glBindBufferARB( GL_ARRAY_BUFFER_ARB, 0 ); |
nkeynes@1160 | 220 | glDeleteBuffersARB( 1, &buf->id ); |
nkeynes@1160 | 221 | } |
nkeynes@1160 | 222 | |
nkeynes@1160 | 223 | static struct vertex_buffer vbo_vtable = { vbo_map, vbo_unmap, vbo_finished, vbo_destroy }; |
nkeynes@1160 | 224 | |
nkeynes@1160 | 225 | static vertex_buffer_t vbo_create_buffer( uint32_t size ) |
nkeynes@1160 | 226 | { |
nkeynes@1160 | 227 | vertex_buffer_t buf = vertex_buffer_new( &vbo_vtable ); |
nkeynes@1160 | 228 | glGenBuffersARB( 1, &buf->id ); |
nkeynes@1160 | 229 | return buf; |
nkeynes@1160 | 230 | } |
nkeynes@1160 | 231 | |
nkeynes@1160 | 232 | #endif |
nkeynes@1160 | 233 | |
nkeynes@1160 | 234 | /** |
nkeynes@1160 | 235 | * Auto-detect the supported vertex buffer types, and select between them. |
nkeynes@1160 | 236 | * Use vertex_buffer_object if available, otherwise vertex_array_range, |
nkeynes@1160 | 237 | * otherwise just pure host buffers. |
nkeynes@1160 | 238 | */ |
nkeynes@1160 | 239 | void gl_vbo_init( display_driver_t driver ) { |
nkeynes@1160 | 240 | /* VBOs are disabled for now as they won't work with the triangle sorting, |
nkeynes@1160 | 241 | * plus they seem to be slower than the other options anyway. |
nkeynes@1160 | 242 | */ |
nkeynes@1160 | 243 | #ifdef ENABLE_VBO |
nkeynes@1160 | 244 | #ifdef GL_ARRAY_BUFFER_ARB |
nkeynes@1160 | 245 | if( isGLVertexBufferSupported() ) { |
nkeynes@1160 | 246 | driver->create_vertex_buffer = vbo_create_buffer; |
nkeynes@1160 | 247 | return; |
nkeynes@1160 | 248 | } |
nkeynes@1160 | 249 | #endif |
nkeynes@1160 | 250 | #endif |
nkeynes@1160 | 251 | |
nkeynes@1160 | 252 | #ifdef APPLE_BUILD |
nkeynes@1160 | 253 | if( isGLExtensionSupported("GL_APPLE_vertex_array_range") && |
nkeynes@1160 | 254 | isGLExtensionSupported("GL_APPLE_fence") ) { |
nkeynes@1160 | 255 | glEnableClientState( GL_VERTEX_ARRAY_RANGE_APPLE ); |
nkeynes@1160 | 256 | driver->create_vertex_buffer = apple_create_buffer; |
nkeynes@1160 | 257 | return; |
nkeynes@1160 | 258 | } |
nkeynes@1160 | 259 | #endif |
nkeynes@1160 | 260 | |
nkeynes@1160 | 261 | #ifdef GL_VERTEX_ARRAY_RANGE_NV |
nkeynes@1160 | 262 | if( isGLExtensionSupported("GL_NV_vertex_array_range") && |
nkeynes@1160 | 263 | isGLExtensionSupported("GL_NV_fence") ) { |
nkeynes@1160 | 264 | glEnableClientState( GL_VERTEX_ARRAY_RANGE_NV ); |
nkeynes@1160 | 265 | driver->create_vertex_buffer = nv_create_buffer; |
nkeynes@1160 | 266 | return; |
nkeynes@1160 | 267 | } |
nkeynes@1160 | 268 | #endif |
nkeynes@1160 | 269 | driver->create_vertex_buffer = def_create_buffer; |
nkeynes@1160 | 270 | } |
nkeynes@1160 | 271 | |
nkeynes@1160 | 272 | void gl_vbo_fallback_init( display_driver_t driver ) { |
nkeynes@1160 | 273 | driver->create_vertex_buffer = def_create_buffer; |
nkeynes@1160 | 274 | } |
.