+/*********************************************************************
+ *
+ * Copyright 2012 Intel Corporation
+ * All Rights Reserved.
+ *
+ * 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 AUTHORS OR COPYRIGHT HOLDERS
+ * 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.
+ *
+ *********************************************************************/
+
+#include <assert.h>
+
+#include <map>
+#if defined(_MSC_VER)
+#include <memory>
+#else
+#include <tr1/memory>
+#endif
+
+#include <os_thread.hpp>
+#include <glproc.hpp>
#include <gltrace.hpp>
-gltrace::Context *
-gltrace::getContext(void)
+namespace gltrace {
+
+typedef std::tr1::shared_ptr<Context> context_ptr_t;
+static std::map<uintptr_t, context_ptr_t> context_map;
+static os::recursive_mutex context_map_mutex;
+
+class ThreadState {
+public:
+ context_ptr_t current_context;
+ context_ptr_t dummy_context; /*
+ * For cases when there is no current
+ * context, but the app still calls some
+ * GL function that expects one.
+ */
+ ThreadState() : dummy_context(new Context)
+ {
+ current_context = dummy_context;
+ }
+};
+
+static OS_THREAD_SPECIFIC_PTR(ThreadState) thread_state;
+
+static ThreadState *get_ts(void)
+{
+ ThreadState *ts = thread_state;
+ if (!ts) {
+ thread_state = ts = new ThreadState;
+ }
+
+ return ts;
+}
+
+static void _retainContext(context_ptr_t ctx)
+{
+ ctx->retain_count++;
+}
+
+void retainContext(uintptr_t context_id)
+{
+ context_map_mutex.lock();
+ if (context_map.find(context_id) != context_map.end())
+ _retainContext(context_map[context_id]);
+ context_map_mutex.unlock();
+}
+
+static bool _releaseContext(context_ptr_t ctx)
+{
+ return !(--ctx->retain_count);
+}
+
+/*
+ * return true if the context was destroyed, false if only its refcount
+ * got decreased. Note that even if the context was destroyed it may
+ * still live, if it's the currently selected context (by setContext).
+ */
+bool releaseContext(uintptr_t context_id)
+{
+ bool res = false;
+
+ context_map_mutex.lock();
+ /*
+ * This can potentially called (from glX) with an invalid context_id,
+ * so don't assert on it being valid.
+ */
+ if (context_map.find(context_id) != context_map.end()) {
+ res = _releaseContext(context_map[context_id]);
+ if (res)
+ context_map.erase(context_id);
+ }
+ context_map_mutex.unlock();
+
+ return res;
+}
+
+void createContext(uintptr_t context_id)
{
- // TODO return the context set by other APIs (GLX, EGL, and etc.)
- static gltrace::Context _ctx = { gltrace::PROFILE_COMPAT, false, false, false };
- return &_ctx;
+ // wglCreateContextAttribsARB causes internal calls to wglCreateContext to be
+ // traced, causing context to be defined twice.
+ if (context_map.find(context_id) != context_map.end()) {
+ return;
+ }
+
+ context_ptr_t ctx(new Context);
+
+ context_map_mutex.lock();
+
+ _retainContext(ctx);
+ context_map[context_id] = ctx;
+
+ context_map_mutex.unlock();
}
+void setContext(uintptr_t context_id)
+{
+ ThreadState *ts = get_ts();
+ context_ptr_t ctx;
+
+ context_map_mutex.lock();
+
+ assert(context_map.find(context_id) != context_map.end());
+ ctx = context_map[context_id];
+
+ context_map_mutex.unlock();
+
+ ts->current_context = ctx;
+
+ if (!ctx->bound) {
+ ctx->bound = true;
+
+ /*
+ * The default viewport and scissor state is set when a context is
+ * first made current, with values matching the bound drawable. Many
+ * applications never thouch the default state ever again.
+ *
+ * Since we currently don't trace window sizes, and rely on viewport
+ * calls to deduct, emit fake calls here so that viewport/scissor state
+ * can be deducated.
+ *
+ * FIXME: don't call the real functions here -- just emit the fake
+ * calls.
+ */
+ GLint viewport[4] = {0, 0, 0, 0};
+ GLint scissor_box[4] = {0, 0, 0, 0};
+ _glGetIntegerv(GL_VIEWPORT, viewport);
+ _glGetIntegerv(GL_SCISSOR_BOX, scissor_box);
+ glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
+ glScissor(scissor_box[0], scissor_box[1], scissor_box[2], scissor_box[3]);
+ }
+}
+
+void clearContext(void)
+{
+ ThreadState *ts = get_ts();
+
+ ts->current_context = ts->dummy_context;
+}
+
+Context *getContext(void)
+{
+ return get_ts()->current_context.get();
+}
+
+}