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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gl/gl_context_nsview.h"
#include <vector>
#import <AppKit/NSOpenGL.h>
#import <AppKit/NSView.h>
#include "base/debug/trace_event.h"
#include "base/logging.h"
#include "ui/gl/gl_surface_nsview.h"
namespace gfx {
GLContextNSView::GLContextNSView(GLShareGroup* group)
: GLContext(group) {
}
GLContextNSView::~GLContextNSView() {
}
bool GLContextNSView::Initialize(GLSurface* surface,
GpuPreference gpu_preference) {
DCHECK(!context_) << "NSGLContext was previously initialized.";
gpu_preference_ = gpu_preference;
std::vector<NSOpenGLPixelFormatAttribute> attributes;
attributes.push_back(NSOpenGLPFAAccelerated);
attributes.push_back(NSOpenGLPFADoubleBuffer);
attributes.push_back(0);
scoped_nsobject<NSOpenGLPixelFormat> pixel_format;
pixel_format.reset([[NSOpenGLPixelFormat alloc]
initWithAttributes:&attributes.front()]);
if (!pixel_format) {
LOG(ERROR) << "NSOpenGLPixelFormat initWithAttributes failed.";
return false;
}
context_.reset([[NSOpenGLContext alloc] initWithFormat:pixel_format
shareContext:nil]);
if (!context_) {
LOG(ERROR) << "NSOpenGLContext initWithFormat failed";
return false;
}
return true;
}
void GLContextNSView::Destroy() {
context_.reset(nil);
}
bool GLContextNSView::MakeCurrent(GLSurface* surface) {
TRACE_EVENT0("gpu", "GLContextNSView::MakeCurrent");
AcceleratedWidget view =
static_cast<AcceleratedWidget>(surface->GetHandle());
// Only set the context's view if the view is parented.
// I.e. it is a valid drawable.
if ([view window])
[context_ setView:view];
[context_ makeCurrentContext];
SetCurrent(this, surface);
if (!surface->OnMakeCurrent(this)) {
LOG(ERROR) << "Unable to make gl context current.";
return false;
}
return true;
}
void GLContextNSView::ReleaseCurrent(GLSurface* surface) {
[NSOpenGLContext clearCurrentContext];
}
bool GLContextNSView::IsCurrent(GLSurface* surface) {
return context_ == [NSOpenGLContext currentContext];
}
void* GLContextNSView::GetHandle() {
return context_;
}
void GLContextNSView::SetSwapInterval(int interval) {
DCHECK(interval == 0 || interval == 1);
GLint swap = interval;
[context_ setValues:&swap forParameter:NSOpenGLCPSwapInterval];
}
void GLContextNSView::FlushBuffer() {
[context_ flushBuffer];
}
} // namespace gfx
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