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src/glx/apple/apple_glx_pbuffer.c

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+/*
+ Copyright (c) 2009 Apple Inc.
+ 
+ Permission is hereby granted, free of charge, to any person
+ obtaining a copy of this software and associated documentation files
+ (the "Software"), to deal in the Software without restriction,
+ including without limitation the rights to use, copy, modify, merge,
+ publish, distribute, sublicense, and/or sell copies of the Software,
+ and to permit persons to whom the Software is furnished to do so,
+ subject to the following conditions:
+ 
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+ 
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT.  IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT
+ HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ DEALINGS IN THE SOFTWARE.
+ 
+ Except as contained in this notice, the name(s) of the above
+ copyright holders shall not be used in advertising or otherwise to
+ promote the sale, use or other dealings in this Software without
+ prior written authorization.
+*/
+
+/* Must be before OpenGL.framework is included.  Remove once fixed:
+ * <rdar://problem/7872773>
+ */
+#include <GL/gl.h>
+#include <GL/glext.h>
+#define __gltypes_h_ 1
+
+/* Must be first for:
+ * <rdar://problem/6953344>
+ */
+#include "apple_glx_context.h"
+#include "apple_glx_drawable.h"
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <assert.h>
+#include "glxclient.h"
+#include "apple_glx.h"
+#include "glxconfig.h"
+#include "apple_cgl.h"
+#include "util/u_debug.h"
+
+/* mesa defines in glew.h, Apple in glext.h.
+ * Due to namespace nightmares, just do it here.
+ */
+#ifndef GL_TEXTURE_RECTANGLE_EXT
+#define GL_TEXTURE_RECTANGLE_EXT 0x84F5
+#endif
+
+static bool pbuffer_make_current(struct apple_glx_context *ac,
+                                 struct apple_glx_drawable *d);
+
+static void pbuffer_destroy(Display * dpy, struct apple_glx_drawable *d);
+
+static struct apple_glx_drawable_callbacks callbacks = {
+   .type = APPLE_GLX_DRAWABLE_PBUFFER,
+   .make_current = pbuffer_make_current,
+   .destroy = pbuffer_destroy
+};
+
+
+/* Return true if an error occurred. */
+bool
+pbuffer_make_current(struct apple_glx_context *ac,
+                     struct apple_glx_drawable *d)
+{
+   struct apple_glx_pbuffer *pbuf = &d->types.pbuffer;
+   CGLError cglerr;
+
+   assert(APPLE_GLX_DRAWABLE_PBUFFER == d->type);
+
+   cglerr = apple_cgl.set_pbuffer(ac->context_obj, pbuf->buffer_obj, 0, 0, 0);
+
+   if (kCGLNoError != cglerr) {
+      fprintf(stderr, "set_pbuffer: %s\n", apple_cgl.error_string(cglerr));
+      return true;
+   }
+
+   if (!ac->made_current) {
+      apple_glapi_oglfw_viewport_scissor(0, 0, pbuf->width, pbuf->height);
+      ac->made_current = true;
+   }
+
+   apple_glx_diagnostic("made pbuffer drawable 0x%lx current\n", d->drawable);
+
+   return false;
+}
+
+void
+pbuffer_destroy(Display * dpy, struct apple_glx_drawable *d)
+{
+   struct apple_glx_pbuffer *pbuf = &d->types.pbuffer;
+
+   assert(APPLE_GLX_DRAWABLE_PBUFFER == d->type);
+
+   apple_glx_diagnostic("destroying pbuffer for drawable 0x%lx\n",
+                        d->drawable);
+
+   apple_cgl.destroy_pbuffer(pbuf->buffer_obj);
+   XFreePixmap(dpy, pbuf->xid);
+}
+
+/* Return true if an error occurred. */
+bool
+apple_glx_pbuffer_destroy(Display * dpy, GLXPbuffer pbuf)
+{
+   return !apple_glx_drawable_destroy_by_type(dpy, pbuf,
+                                              APPLE_GLX_DRAWABLE_PBUFFER);
+}
+
+/* Return true if an error occurred. */
+bool
+apple_glx_pbuffer_create(Display * dpy, GLXFBConfig config,
+                         int width, int height, int *errorcode,
+                         GLXPbuffer * result)
+{
+   struct apple_glx_drawable *d;
+   struct apple_glx_pbuffer *pbuf = NULL;
+   CGLError err;
+   Window root;
+   int screen;
+   Pixmap xid;
+   struct glx_config *modes = (struct glx_config *) config;
+
+   root = DefaultRootWindow(dpy);
+   screen = DefaultScreen(dpy);
+
+   /*
+    * This pixmap is only used for a persistent XID.
+    * The XC-MISC extension cleans up XIDs and reuses them transparently,
+    * so we need to retain a server-side reference.
+    */
+   xid = XCreatePixmap(dpy, root, (unsigned int) 1,
+                       (unsigned int) 1, DefaultDepth(dpy, screen));
+
+   if (None == xid) {
+      *errorcode = BadAlloc;
+      return true;
+   }
+
+   if (apple_glx_drawable_create(dpy, screen, xid, &d, &callbacks)) {
+      *errorcode = BadAlloc;
+      return true;
+   }
+
+   /* The lock is held in d from create onward. */
+   pbuf = &d->types.pbuffer;
+
+   pbuf->xid = xid;
+   pbuf->width = width;
+   pbuf->height = height;
+
+   err = apple_cgl.create_pbuffer(width, height, GL_TEXTURE_RECTANGLE_EXT,
+                                  (modes->alphaBits > 0) ? GL_RGBA : GL_RGB,
+                                  0, &pbuf->buffer_obj);
+
+   if (kCGLNoError != err) {
+      d->unlock(d);
+      d->destroy(d);
+      *errorcode = BadMatch;
+      return true;
+   }
+
+   pbuf->fbconfigID = modes->fbconfigID;
+
+   pbuf->event_mask = 0;
+
+   *result = pbuf->xid;
+
+   d->unlock(d);
+
+   return false;
+}
+
+
+
+/* Return true if an error occurred. */
+static bool
+get_max_size(int *widthresult, int *heightresult)
+{
+   CGLContextObj oldcontext;
+   GLint ar[2];
+
+   oldcontext = apple_cgl.get_current_context();
+
+   if (!oldcontext) {
+      /* 
+       * There is no current context, so we need to make one in order
+       * to call glGetInteger.
+       */
+      CGLPixelFormatObj pfobj;
+      CGLError err;
+      CGLPixelFormatAttribute attr[10];
+      int c = 0;
+      GLint vsref = 0;
+      CGLContextObj newcontext;
+
+      attr[c++] = kCGLPFAColorSize;
+      attr[c++] = 32;
+      attr[c++] = 0;
+
+      err = apple_cgl.choose_pixel_format(attr, &pfobj, &vsref);
+      if (kCGLNoError != err) {
+            DebugMessageF("choose_pixel_format error in %s: %s\n", __func__,
+                          apple_cgl.error_string(err));
+
+         return true;
+      }
+
+
+      err = apple_cgl.create_context(pfobj, NULL, &newcontext);
+
+      if (kCGLNoError != err) {
+         DebugMessageF("create_context error in %s: %s\n", __func__,
+                       apple_cgl.error_string(err));
+
+         apple_cgl.destroy_pixel_format(pfobj);
+
+         return true;
+      }
+
+      err = apple_cgl.set_current_context(newcontext);
+
+      if (kCGLNoError != err) {
+         DebugMessageF("set_current_context error in %s: %s\n", __func__,
+                       apple_cgl.error_string(err));
+         return true;
+      }
+
+
+      glGetIntegerv(GL_MAX_VIEWPORT_DIMS, ar);
+
+      apple_cgl.set_current_context(oldcontext);
+      apple_cgl.destroy_context(newcontext);
+      apple_cgl.destroy_pixel_format(pfobj);
+   }
+   else {
+      /* We have a valid context. */
+
+      glGetIntegerv(GL_MAX_VIEWPORT_DIMS, ar);
+   }
+
+   *widthresult = ar[0];
+   *heightresult = ar[1];
+
+   return false;
+}
+
+bool
+apple_glx_pbuffer_query(GLXPbuffer p, int attr, unsigned int *value)
+{
+   bool result = false;
+   struct apple_glx_drawable *d;
+   struct apple_glx_pbuffer *pbuf;
+
+   d = apple_glx_drawable_find_by_type(p, APPLE_GLX_DRAWABLE_PBUFFER,
+                                       APPLE_GLX_DRAWABLE_LOCK);
+
+   if (d) {
+      pbuf = &d->types.pbuffer;
+
+      switch (attr) {
+      case GLX_WIDTH:
+         *value = pbuf->width;
+         result = true;
+         break;
+
+      case GLX_HEIGHT:
+         *value = pbuf->height;
+         result = true;
+         break;
+
+      case GLX_PRESERVED_CONTENTS:
+         *value = true;
+         result = true;
+         break;
+
+      case GLX_LARGEST_PBUFFER:{
+            int width, height;
+            if (get_max_size(&width, &height)) {
+               fprintf(stderr, "internal error: "
+                       "unable to find the largest pbuffer!\n");
+            }
+            else {
+               *value = width;
+               result = true;
+            }
+         }
+         break;
+
+      case GLX_FBCONFIG_ID:
+         *value = pbuf->fbconfigID;
+         result = true;
+         break;
+      }
+
+      d->unlock(d);
+   }
+
+   return result;
+}
+
+bool
+apple_glx_pbuffer_set_event_mask(GLXDrawable drawable, unsigned long mask)
+{
+   struct apple_glx_drawable *d;
+   bool result = false;
+
+   d = apple_glx_drawable_find_by_type(drawable, APPLE_GLX_DRAWABLE_PBUFFER,
+                                       APPLE_GLX_DRAWABLE_LOCK);
+
+   if (d) {
+      d->types.pbuffer.event_mask = mask;
+      result = true;
+      d->unlock(d);
+   }
+
+   return result;
+}
+
+bool
+apple_glx_pbuffer_get_event_mask(GLXDrawable drawable, unsigned long *mask)
+{
+   struct apple_glx_drawable *d;
+   bool result = false;
+
+   d = apple_glx_drawable_find_by_type(drawable, APPLE_GLX_DRAWABLE_PBUFFER,
+                                       APPLE_GLX_DRAWABLE_LOCK);
+   if (d) {
+      *mask = d->types.pbuffer.event_mask;
+      result = true;
+      d->unlock(d);
+   }
+
+   return result;
+}