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/*********************************************************************
*
* 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>
#include <memory>
#include <os_thread.hpp>
#include <glproc.hpp>
#include <gltrace.hpp>
namespace gltrace {
typedef std::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)
{
// 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->profile = glfeatures::getCurrentContextProfile();
ctx->extensions.getCurrentContextExtensions(ctx->profile);
ctx->features.load(ctx->profile, ctx->extensions);
ctx->bound = true;
}
if (!ctx->boundDrawable) {
/*
* 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[4] = {0, 0, 0, 0};
_glGetIntegerv(GL_VIEWPORT, viewport);
_glGetIntegerv(GL_SCISSOR_BOX, scissor);
/*
* On MacOSX the current context and surface are set independently, and
* we might be called before both are set, so ignore empty boxes.
*/
if (viewport[2] && viewport[3] && scissor[2] && scissor[3]) {
glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
glScissor(scissor[0], scissor[1], scissor[2], scissor[3]);
ctx->boundDrawable = true;
}
}
}
void clearContext(void)
{
ThreadState *ts = get_ts();
ts->current_context = ts->dummy_context;
}
Context *getContext(void)
{
return get_ts()->current_context.get();
}
}
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