apple_glx_pbuffer.c revision 4c9bab78a118953baf307e31cd53e731299f0151
1/* 2 Copyright (c) 2009 Apple Inc. 3 4 Permission is hereby granted, free of charge, to any person 5 obtaining a copy of this software and associated documentation files 6 (the "Software"), to deal in the Software without restriction, 7 including without limitation the rights to use, copy, modify, merge, 8 publish, distribute, sublicense, and/or sell copies of the Software, 9 and to permit persons to whom the Software is furnished to do so, 10 subject to the following conditions: 11 12 The above copyright notice and this permission notice shall be 13 included in all copies or substantial portions of the Software. 14 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 17 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18 NONINFRINGEMENT. IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT 19 HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 20 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 22 DEALINGS IN THE SOFTWARE. 23 24 Except as contained in this notice, the name(s) of the above 25 copyright holders shall not be used in advertising or otherwise to 26 promote the sale, use or other dealings in this Software without 27 prior written authorization. 28*/ 29 30/* Must be before OpenGL.framework is included. Remove once fixed: 31 * <rdar://problem/7872773> 32 */ 33#include <GL/gl.h> 34#include <GL/glext.h> 35#define __gltypes_h_ 1 36 37/* Must be first for: 38 * <rdar://problem/6953344> 39 */ 40#include "apple_glx_context.h" 41#include "apple_glx_drawable.h" 42 43#include <stdlib.h> 44#include <pthread.h> 45#include <assert.h> 46#include "apple_glx.h" 47#include "glxconfig.h" 48#include "apple_cgl.h" 49 50/* mesa defines in glew.h, Apple in glext.h. 51 * Due to namespace nightmares, just do it here. 52 */ 53#ifndef GL_TEXTURE_RECTANGLE_EXT 54#define GL_TEXTURE_RECTANGLE_EXT 0x84F5 55#endif 56 57static bool pbuffer_make_current(struct apple_glx_context *ac, 58 struct apple_glx_drawable *d); 59 60static void pbuffer_destroy(Display * dpy, struct apple_glx_drawable *d); 61 62static struct apple_glx_drawable_callbacks callbacks = { 63 .type = APPLE_GLX_DRAWABLE_PBUFFER, 64 .make_current = pbuffer_make_current, 65 .destroy = pbuffer_destroy 66}; 67 68 69/* Return true if an error occurred. */ 70bool 71pbuffer_make_current(struct apple_glx_context *ac, 72 struct apple_glx_drawable *d) 73{ 74 struct apple_glx_pbuffer *pbuf = &d->types.pbuffer; 75 CGLError cglerr; 76 77 assert(APPLE_GLX_DRAWABLE_PBUFFER == d->type); 78 79 cglerr = apple_cgl.set_pbuffer(ac->context_obj, pbuf->buffer_obj, 0, 0, 0); 80 81 if (kCGLNoError != cglerr) { 82 fprintf(stderr, "set_pbuffer: %s\n", apple_cgl.error_string(cglerr)); 83 return true; 84 } 85 86 if (!ac->made_current) { 87 glViewport(0, 0, pbuf->width, pbuf->height); 88 glScissor(0, 0, pbuf->width, pbuf->height); 89 ac->made_current = true; 90 } 91 92 apple_glx_diagnostic("made pbuffer drawable 0x%lx current\n", d->drawable); 93 94 return false; 95} 96 97void 98pbuffer_destroy(Display * dpy, struct apple_glx_drawable *d) 99{ 100 struct apple_glx_pbuffer *pbuf = &d->types.pbuffer; 101 102 assert(APPLE_GLX_DRAWABLE_PBUFFER == d->type); 103 104 apple_glx_diagnostic("destroying pbuffer for drawable 0x%lx\n", 105 d->drawable); 106 107 apple_cgl.destroy_pbuffer(pbuf->buffer_obj); 108 XFreePixmap(dpy, pbuf->xid); 109} 110 111/* Return true if an error occurred. */ 112bool 113apple_glx_pbuffer_destroy(Display * dpy, GLXPbuffer pbuf) 114{ 115 return !apple_glx_drawable_destroy_by_type(dpy, pbuf, 116 APPLE_GLX_DRAWABLE_PBUFFER); 117} 118 119/* Return true if an error occurred. */ 120bool 121apple_glx_pbuffer_create(Display * dpy, GLXFBConfig config, 122 int width, int height, int *errorcode, 123 GLXPbuffer * result) 124{ 125 struct apple_glx_drawable *d; 126 struct apple_glx_pbuffer *pbuf = NULL; 127 CGLError err; 128 Window root; 129 int screen; 130 Pixmap xid; 131 struct glx_config *modes = (__GLcontextModes *) config; 132 133 root = DefaultRootWindow(dpy); 134 screen = DefaultScreen(dpy); 135 136 /* 137 * This pixmap is only used for a persistent XID. 138 * The XC-MISC extension cleans up XIDs and reuses them transparently, 139 * so we need to retain a server-side reference. 140 */ 141 xid = XCreatePixmap(dpy, root, (unsigned int) 1, 142 (unsigned int) 1, DefaultDepth(dpy, screen)); 143 144 if (None == xid) { 145 *errorcode = BadAlloc; 146 return true; 147 } 148 149 if (apple_glx_drawable_create(dpy, screen, xid, &d, &callbacks)) { 150 *errorcode = BadAlloc; 151 return true; 152 } 153 154 /* The lock is held in d from create onward. */ 155 pbuf = &d->types.pbuffer; 156 157 pbuf->xid = xid; 158 pbuf->width = width; 159 pbuf->height = height; 160 161 err = apple_cgl.create_pbuffer(width, height, GL_TEXTURE_RECTANGLE_EXT, 162 (modes->alphaBits > 0) ? GL_RGBA : GL_RGB, 163 0, &pbuf->buffer_obj); 164 165 if (kCGLNoError != err) { 166 d->unlock(d); 167 d->destroy(d); 168 *errorcode = BadMatch; 169 return true; 170 } 171 172 pbuf->fbconfigID = modes->fbconfigID; 173 174 pbuf->event_mask = 0; 175 176 *result = pbuf->xid; 177 178 d->unlock(d); 179 180 return false; 181} 182 183 184 185/* Return true if an error occurred. */ 186static bool 187get_max_size(int *widthresult, int *heightresult) 188{ 189 CGLContextObj oldcontext; 190 GLint ar[2]; 191 192 oldcontext = apple_cgl.get_current_context(); 193 194 if (!oldcontext) { 195 /* 196 * There is no current context, so we need to make one in order 197 * to call glGetInteger. 198 */ 199 CGLPixelFormatObj pfobj; 200 CGLError err; 201 CGLPixelFormatAttribute attr[10]; 202 int c = 0; 203 GLint vsref = 0; 204 CGLContextObj newcontext; 205 206 attr[c++] = kCGLPFAColorSize; 207 attr[c++] = 32; 208 attr[c++] = 0; 209 210 err = apple_cgl.choose_pixel_format(attr, &pfobj, &vsref); 211 if (kCGLNoError != err) { 212 if (getenv("LIBGL_DIAGNOSTIC")) { 213 printf("choose_pixel_format error in %s: %s\n", __func__, 214 apple_cgl.error_string(err)); 215 } 216 217 return true; 218 } 219 220 221 err = apple_cgl.create_context(pfobj, NULL, &newcontext); 222 223 if (kCGLNoError != err) { 224 if (getenv("LIBGL_DIAGNOSTIC")) { 225 printf("create_context error in %s: %s\n", __func__, 226 apple_cgl.error_string(err)); 227 } 228 229 apple_cgl.destroy_pixel_format(pfobj); 230 231 return true; 232 } 233 234 err = apple_cgl.set_current_context(newcontext); 235 236 if (kCGLNoError != err) { 237 printf("set_current_context error in %s: %s\n", __func__, 238 apple_cgl.error_string(err)); 239 return true; 240 } 241 242 243 glGetIntegerv(GL_MAX_VIEWPORT_DIMS, ar); 244 245 apple_cgl.set_current_context(oldcontext); 246 apple_cgl.destroy_context(newcontext); 247 apple_cgl.destroy_pixel_format(pfobj); 248 } 249 else { 250 /* We have a valid context. */ 251 252 glGetIntegerv(GL_MAX_VIEWPORT_DIMS, ar); 253 } 254 255 *widthresult = ar[0]; 256 *heightresult = ar[1]; 257 258 return false; 259} 260 261bool 262apple_glx_pbuffer_query(GLXPbuffer p, int attr, unsigned int *value) 263{ 264 bool result = false; 265 struct apple_glx_drawable *d; 266 struct apple_glx_pbuffer *pbuf; 267 268 d = apple_glx_drawable_find_by_type(p, APPLE_GLX_DRAWABLE_PBUFFER, 269 APPLE_GLX_DRAWABLE_LOCK); 270 271 if (d) { 272 pbuf = &d->types.pbuffer; 273 274 switch (attr) { 275 case GLX_WIDTH: 276 *value = pbuf->width; 277 result = true; 278 break; 279 280 case GLX_HEIGHT: 281 *value = pbuf->height; 282 result = true; 283 break; 284 285 case GLX_PRESERVED_CONTENTS: 286 *value = true; 287 result = true; 288 break; 289 290 case GLX_LARGEST_PBUFFER:{ 291 int width, height; 292 if (get_max_size(&width, &height)) { 293 fprintf(stderr, "internal error: " 294 "unable to find the largest pbuffer!\n"); 295 } 296 else { 297 *value = width; 298 result = true; 299 } 300 } 301 break; 302 303 case GLX_FBCONFIG_ID: 304 *value = pbuf->fbconfigID; 305 result = true; 306 break; 307 } 308 309 d->unlock(d); 310 } 311 312 return result; 313} 314 315bool 316apple_glx_pbuffer_set_event_mask(GLXDrawable drawable, unsigned long mask) 317{ 318 struct apple_glx_drawable *d; 319 bool result = false; 320 321 d = apple_glx_drawable_find_by_type(drawable, APPLE_GLX_DRAWABLE_PBUFFER, 322 APPLE_GLX_DRAWABLE_LOCK); 323 324 if (d) { 325 d->types.pbuffer.event_mask = mask; 326 result = true; 327 d->unlock(d); 328 } 329 330 return result; 331} 332 333bool 334apple_glx_pbuffer_get_event_mask(GLXDrawable drawable, unsigned long *mask) 335{ 336 struct apple_glx_drawable *d; 337 bool result = false; 338 339 d = apple_glx_drawable_find_by_type(drawable, APPLE_GLX_DRAWABLE_PBUFFER, 340 APPLE_GLX_DRAWABLE_LOCK); 341 if (d) { 342 *mask = d->types.pbuffer.event_mask; 343 result = true; 344 d->unlock(d); 345 } 346 347 return result; 348} 349