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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This class implements the XWindowWrapper class.
#include "gpu/command_buffer/service/precompile.h"
#include "gpu/command_buffer/common/cross/logging.h"
#include "gpu/command_buffer/service/linux/x_utils.h"
namespace command_buffer {
bool XWindowWrapper::Initialize() {
XWindowAttributes attributes;
XGetWindowAttributes(display_, window_, &attributes);
XVisualInfo visual_info_template;
visual_info_template.visualid = XVisualIDFromVisual(attributes.visual);
int visual_info_count = 0;
XVisualInfo *visual_info_list = XGetVisualInfo(display_, VisualIDMask,
&visual_info_template,
&visual_info_count);
DCHECK(visual_info_list);
DCHECK_GT(visual_info_count, 0);
context_ = 0;
for (int i = 0; i < visual_info_count; ++i) {
context_ = glXCreateContext(display_, visual_info_list + i, 0,
True);
if (context_) break;
}
XFree(visual_info_list);
if (!context_) {
DLOG(ERROR) << "Couldn't create GL context.";
return false;
}
return true;
}
bool XWindowWrapper::MakeCurrent() {
if (glXMakeCurrent(display_, window_, context_) != True) {
glXDestroyContext(display_, context_);
context_ = 0;
DLOG(ERROR) << "Couldn't make context current.";
return false;
}
return true;
}
void XWindowWrapper::Destroy() {
Bool result = glXMakeCurrent(display_, 0, 0);
// glXMakeCurrent isn't supposed to fail when unsetting the context, unless
// we have pending draws on an invalid window - which shouldn't be the case
// here.
DCHECK(result);
if (context_) {
glXDestroyContext(display_, context_);
context_ = 0;
}
}
void XWindowWrapper::SwapBuffers() {
glXSwapBuffers(display_, window_);
}
} // namespace command_buffer
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