glamor_fbo.c (11389B)
1 /* 2 * Copyright © 2009 Intel Corporation 3 * Copyright © 1998 Keith Packard 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the next 13 * paragraph) shall be included in all copies or substantial portions of the 14 * Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 22 * IN THE SOFTWARE. 23 * 24 * Authors: 25 * Zhigang Gong <zhigang.gong@gmail.com> 26 * 27 */ 28 29 #include <stdlib.h> 30 31 #include "glamor_priv.h" 32 33 void 34 glamor_destroy_fbo(glamor_screen_private *glamor_priv, 35 glamor_pixmap_fbo *fbo) 36 { 37 glamor_make_current(glamor_priv); 38 39 if (fbo->fb) 40 glDeleteFramebuffers(1, &fbo->fb); 41 if (fbo->tex) 42 glDeleteTextures(1, &fbo->tex); 43 44 free(fbo); 45 } 46 47 static int 48 glamor_pixmap_ensure_fb(glamor_screen_private *glamor_priv, 49 glamor_pixmap_fbo *fbo) 50 { 51 int status, err = 0; 52 53 glamor_make_current(glamor_priv); 54 55 if (fbo->fb == 0) 56 glGenFramebuffers(1, &fbo->fb); 57 assert(fbo->tex != 0); 58 glBindFramebuffer(GL_FRAMEBUFFER, fbo->fb); 59 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, 60 GL_TEXTURE_2D, fbo->tex, 0); 61 status = glCheckFramebufferStatus(GL_FRAMEBUFFER); 62 if (status != GL_FRAMEBUFFER_COMPLETE) { 63 const char *str; 64 65 switch (status) { 66 case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT: 67 str = "incomplete attachment"; 68 break; 69 case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: 70 str = "incomplete/missing attachment"; 71 break; 72 case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER: 73 str = "incomplete draw buffer"; 74 break; 75 case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER: 76 str = "incomplete read buffer"; 77 break; 78 case GL_FRAMEBUFFER_UNSUPPORTED: 79 str = "unsupported"; 80 break; 81 case GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE: 82 str = "incomplete multiple"; 83 break; 84 default: 85 str = "unknown error"; 86 break; 87 } 88 89 glamor_fallback("glamor: Failed to create fbo, %s\n", str); 90 err = -1; 91 } 92 93 return err; 94 } 95 96 glamor_pixmap_fbo * 97 glamor_create_fbo_from_tex(glamor_screen_private *glamor_priv, 98 PixmapPtr pixmap, int w, int h, GLint tex, int flag) 99 { 100 const struct glamor_format *f = glamor_format_for_pixmap(pixmap); 101 glamor_pixmap_fbo *fbo; 102 103 fbo = calloc(1, sizeof(*fbo)); 104 if (fbo == NULL) 105 return NULL; 106 107 fbo->tex = tex; 108 fbo->width = w; 109 fbo->height = h; 110 fbo->is_red = f->format == GL_RED; 111 112 if (flag != GLAMOR_CREATE_FBO_NO_FBO) { 113 if (glamor_pixmap_ensure_fb(glamor_priv, fbo) != 0) { 114 glamor_destroy_fbo(glamor_priv, fbo); 115 fbo = NULL; 116 } 117 } 118 119 return fbo; 120 } 121 122 static int 123 _glamor_create_tex(glamor_screen_private *glamor_priv, 124 PixmapPtr pixmap, int w, int h) 125 { 126 const struct glamor_format *f = glamor_format_for_pixmap(pixmap); 127 unsigned int tex; 128 129 glamor_make_current(glamor_priv); 130 glGenTextures(1, &tex); 131 glBindTexture(GL_TEXTURE_2D, tex); 132 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 133 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 134 if (f->format == GL_RED) 135 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_A, GL_RED); 136 glamor_priv->suppress_gl_out_of_memory_logging = true; 137 glTexImage2D(GL_TEXTURE_2D, 0, f->internalformat, w, h, 0, 138 f->format, f->type, NULL); 139 glamor_priv->suppress_gl_out_of_memory_logging = false; 140 141 if (glGetError() == GL_OUT_OF_MEMORY) { 142 if (!glamor_priv->logged_any_fbo_allocation_failure) { 143 LogMessageVerb(X_WARNING, 0, "glamor: Failed to allocate %dx%d " 144 "FBO due to GL_OUT_OF_MEMORY.\n", w, h); 145 LogMessageVerb(X_WARNING, 0, 146 "glamor: Expect reduced performance.\n"); 147 glamor_priv->logged_any_fbo_allocation_failure = true; 148 } 149 glDeleteTextures(1, &tex); 150 return 0; 151 } 152 153 return tex; 154 } 155 156 glamor_pixmap_fbo * 157 glamor_create_fbo(glamor_screen_private *glamor_priv, 158 PixmapPtr pixmap, int w, int h, int flag) 159 { 160 GLint tex = _glamor_create_tex(glamor_priv, pixmap, w, h); 161 162 if (!tex) /* Texture creation failed due to GL_OUT_OF_MEMORY */ 163 return NULL; 164 165 return glamor_create_fbo_from_tex(glamor_priv, pixmap, w, h, 166 tex, flag); 167 } 168 169 /** 170 * Create storage for the w * h region, using FBOs of the GL's maximum 171 * supported size. 172 */ 173 glamor_pixmap_fbo * 174 glamor_create_fbo_array(glamor_screen_private *glamor_priv, 175 PixmapPtr pixmap, int flag, 176 int block_w, int block_h, 177 glamor_pixmap_private *priv) 178 { 179 int w = pixmap->drawable.width; 180 int h = pixmap->drawable.height; 181 int block_wcnt; 182 int block_hcnt; 183 glamor_pixmap_fbo **fbo_array; 184 BoxPtr box_array; 185 int i, j; 186 187 priv->block_w = block_w; 188 priv->block_h = block_h; 189 190 block_wcnt = (w + block_w - 1) / block_w; 191 block_hcnt = (h + block_h - 1) / block_h; 192 193 box_array = calloc(block_wcnt * block_hcnt, sizeof(box_array[0])); 194 if (box_array == NULL) 195 return NULL; 196 197 fbo_array = calloc(block_wcnt * block_hcnt, sizeof(glamor_pixmap_fbo *)); 198 if (fbo_array == NULL) { 199 free(box_array); 200 return FALSE; 201 } 202 for (i = 0; i < block_hcnt; i++) { 203 int block_y1, block_y2; 204 int fbo_w, fbo_h; 205 206 block_y1 = i * block_h; 207 block_y2 = (block_y1 + block_h) > h ? h : (block_y1 + block_h); 208 fbo_h = block_y2 - block_y1; 209 210 for (j = 0; j < block_wcnt; j++) { 211 box_array[i * block_wcnt + j].x1 = j * block_w; 212 box_array[i * block_wcnt + j].y1 = block_y1; 213 box_array[i * block_wcnt + j].x2 = 214 (j + 1) * block_w > w ? w : (j + 1) * block_w; 215 box_array[i * block_wcnt + j].y2 = block_y2; 216 fbo_w = 217 box_array[i * block_wcnt + j].x2 - box_array[i * block_wcnt + 218 j].x1; 219 fbo_array[i * block_wcnt + j] = glamor_create_fbo(glamor_priv, 220 pixmap, 221 fbo_w, fbo_h, 222 GLAMOR_CREATE_PIXMAP_FIXUP); 223 if (fbo_array[i * block_wcnt + j] == NULL) 224 goto cleanup; 225 } 226 } 227 228 priv->box = box_array[0]; 229 priv->box_array = box_array; 230 priv->fbo_array = fbo_array; 231 priv->block_wcnt = block_wcnt; 232 priv->block_hcnt = block_hcnt; 233 return fbo_array[0]; 234 235 cleanup: 236 for (i = 0; i < block_wcnt * block_hcnt; i++) 237 if (fbo_array[i]) 238 glamor_destroy_fbo(glamor_priv, fbo_array[i]); 239 free(box_array); 240 free(fbo_array); 241 return NULL; 242 } 243 244 void 245 glamor_pixmap_clear_fbo(glamor_screen_private *glamor_priv, glamor_pixmap_fbo *fbo, 246 const struct glamor_format *pixmap_format) 247 { 248 glamor_make_current(glamor_priv); 249 250 assert(fbo->fb != 0 && fbo->tex != 0); 251 252 if (glamor_priv->has_clear_texture) { 253 glClearTexImage(fbo->tex, 0, pixmap_format->format, pixmap_format->type, NULL); 254 } 255 else { 256 glamor_set_destination_pixmap_fbo(glamor_priv, fbo, 0, 0, fbo->width, fbo->height); 257 258 glClearColor(0.0, 0.0, 0.0, 0.0); 259 glClear(GL_COLOR_BUFFER_BIT); 260 } 261 } 262 263 glamor_pixmap_fbo * 264 glamor_pixmap_detach_fbo(glamor_pixmap_private *pixmap_priv) 265 { 266 glamor_pixmap_fbo *fbo; 267 268 if (pixmap_priv == NULL) 269 return NULL; 270 271 fbo = pixmap_priv->fbo; 272 if (fbo == NULL) 273 return NULL; 274 275 pixmap_priv->fbo = NULL; 276 return fbo; 277 } 278 279 /* The pixmap must not be attached to another fbo. */ 280 void 281 glamor_pixmap_attach_fbo(PixmapPtr pixmap, glamor_pixmap_fbo *fbo) 282 { 283 glamor_pixmap_private *pixmap_priv; 284 285 pixmap_priv = glamor_get_pixmap_private(pixmap); 286 287 if (pixmap_priv->fbo) 288 return; 289 290 pixmap_priv->fbo = fbo; 291 292 switch (pixmap_priv->type) { 293 case GLAMOR_TEXTURE_ONLY: 294 case GLAMOR_TEXTURE_DRM: 295 pixmap_priv->gl_fbo = GLAMOR_FBO_NORMAL; 296 pixmap->devPrivate.ptr = NULL; 297 default: 298 break; 299 } 300 } 301 302 void 303 glamor_pixmap_destroy_fbo(PixmapPtr pixmap) 304 { 305 ScreenPtr screen = pixmap->drawable.pScreen; 306 glamor_screen_private *glamor_priv = glamor_get_screen_private(screen); 307 glamor_pixmap_private *priv = glamor_get_pixmap_private(pixmap); 308 glamor_pixmap_fbo *fbo; 309 310 if (glamor_pixmap_priv_is_large(priv)) { 311 int i; 312 313 for (i = 0; i < priv->block_wcnt * priv->block_hcnt; i++) 314 glamor_destroy_fbo(glamor_priv, priv->fbo_array[i]); 315 free(priv->fbo_array); 316 priv->fbo_array = NULL; 317 } 318 else { 319 fbo = glamor_pixmap_detach_fbo(priv); 320 if (fbo) 321 glamor_destroy_fbo(glamor_priv, fbo); 322 } 323 } 324 325 Bool 326 glamor_pixmap_ensure_fbo(PixmapPtr pixmap, int flag) 327 { 328 glamor_screen_private *glamor_priv; 329 glamor_pixmap_private *pixmap_priv; 330 glamor_pixmap_fbo *fbo; 331 332 glamor_priv = glamor_get_screen_private(pixmap->drawable.pScreen); 333 pixmap_priv = glamor_get_pixmap_private(pixmap); 334 if (pixmap_priv->fbo == NULL) { 335 336 fbo = glamor_create_fbo(glamor_priv, pixmap, pixmap->drawable.width, 337 pixmap->drawable.height, flag); 338 if (fbo == NULL) 339 return FALSE; 340 341 glamor_pixmap_attach_fbo(pixmap, fbo); 342 } 343 else { 344 /* We do have a fbo, but it may lack of fb or tex. */ 345 if (!pixmap_priv->fbo->tex) 346 pixmap_priv->fbo->tex = 347 _glamor_create_tex(glamor_priv, pixmap, pixmap->drawable.width, 348 pixmap->drawable.height); 349 350 if (flag != GLAMOR_CREATE_FBO_NO_FBO && pixmap_priv->fbo->fb == 0) 351 if (glamor_pixmap_ensure_fb(glamor_priv, pixmap_priv->fbo) != 0) 352 return FALSE; 353 } 354 355 return TRUE; 356 } 357 358 _X_EXPORT void 359 glamor_pixmap_exchange_fbos(PixmapPtr front, PixmapPtr back) 360 { 361 glamor_pixmap_private *front_priv, *back_priv; 362 glamor_pixmap_fbo *temp_fbo; 363 364 front_priv = glamor_get_pixmap_private(front); 365 back_priv = glamor_get_pixmap_private(back); 366 temp_fbo = front_priv->fbo; 367 front_priv->fbo = back_priv->fbo; 368 back_priv->fbo = temp_fbo; 369 }