michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "TexturePoolOGL.h"
michael@0: #include <stdlib.h>                     // for malloc
michael@0: #include "GLContext.h"                  // for GLContext
michael@0: #include "mozilla/Monitor.h"            // for Monitor, MonitorAutoLock
michael@0: #include "mozilla/mozalloc.h"           // for operator delete, etc
michael@0: #include "nsDebug.h"                    // for NS_ASSERTION, NS_ERROR, etc
michael@0: #include "nsDeque.h"                    // for nsDeque
michael@0: 
michael@0: #define TEXTURE_POOL_SIZE 10
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace gl {
michael@0: 
michael@0: static GLContext* sActiveContext = nullptr;
michael@0: 
michael@0: static Monitor* sMonitor = nullptr;
michael@0: static nsDeque* sTextures = nullptr;
michael@0: 
michael@0: GLuint TexturePoolOGL::AcquireTexture()
michael@0: {
michael@0:   NS_ASSERTION(sMonitor, "not initialized");
michael@0: 
michael@0:   MonitorAutoLock lock(*sMonitor);
michael@0: 
michael@0:   if (!sActiveContext) {
michael@0:     // Wait for a context
michael@0:     sMonitor->Wait();
michael@0: 
michael@0:     if (!sActiveContext)
michael@0:       return 0;
michael@0:   }
michael@0: 
michael@0:   GLuint texture = 0;
michael@0:   if (sActiveContext->IsOwningThreadCurrent()) {
michael@0:     sActiveContext->MakeCurrent();
michael@0: 
michael@0:     sActiveContext->fGenTextures(1, &texture);
michael@0:   } else {
michael@0:     while (sTextures->GetSize() == 0) {
michael@0:       NS_WARNING("Waiting for texture");
michael@0:       sMonitor->Wait();
michael@0:     }
michael@0: 
michael@0:     GLuint* popped = (GLuint*) sTextures->Pop();
michael@0:     if (!popped) {
michael@0:       NS_ERROR("Failed to pop texture pool item");
michael@0:       return 0;
michael@0:     }
michael@0: 
michael@0:     texture = *popped;
michael@0:     delete popped;
michael@0: 
michael@0:     NS_ASSERTION(texture, "Failed to retrieve texture from pool");
michael@0:   }
michael@0: 
michael@0:   return texture;
michael@0: }
michael@0: 
michael@0: static void Clear()
michael@0: {
michael@0:   if (!sActiveContext)
michael@0:     return;
michael@0: 
michael@0:   sActiveContext->MakeCurrent();
michael@0: 
michael@0:   GLuint* item;
michael@0:   while (sTextures->GetSize()) {
michael@0:     item = (GLuint*)sTextures->Pop();
michael@0:     sActiveContext->fDeleteTextures(1, item);
michael@0:     delete item;
michael@0:   }
michael@0: }
michael@0: 
michael@0: void TexturePoolOGL::Fill(GLContext* aContext)
michael@0: {
michael@0:   NS_ASSERTION(aContext, "NULL GLContext");
michael@0:   NS_ASSERTION(sMonitor, "not initialized");
michael@0: 
michael@0:   MonitorAutoLock lock(*sMonitor);
michael@0: 
michael@0:   if (sActiveContext != aContext) {
michael@0:     Clear();
michael@0:     sActiveContext = aContext;
michael@0:   }
michael@0: 
michael@0:   if (sTextures->GetSize() == TEXTURE_POOL_SIZE)
michael@0:     return;
michael@0: 
michael@0:   sActiveContext->MakeCurrent();
michael@0: 
michael@0:   GLuint* texture = nullptr;
michael@0:   while (sTextures->GetSize() < TEXTURE_POOL_SIZE) {
michael@0:     texture = (GLuint*)malloc(sizeof(GLuint));
michael@0:     sActiveContext->fGenTextures(1, texture);
michael@0:     sTextures->Push((void*) texture);
michael@0:   }
michael@0: 
michael@0:   sMonitor->NotifyAll();
michael@0: }
michael@0: 
michael@0: void TexturePoolOGL::Init()
michael@0: {
michael@0:   sMonitor = new Monitor("TexturePoolOGL.sMonitor");
michael@0:   sTextures = new nsDeque();
michael@0: }
michael@0: 
michael@0: void TexturePoolOGL::Shutdown()
michael@0: {
michael@0:   delete sMonitor;
michael@0:   delete sTextures;
michael@0: }
michael@0: 
michael@0: } // gl
michael@0: } // mozilla