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// Copyright (c) 2011 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/gfx/gl/gl_surface_osmesa.h"
#include "base/logging.h"
#include "ui/gfx/gl/gl_bindings.h"
namespace gfx {
GLSurfaceOSMesa::GLSurfaceOSMesa()
{
}
GLSurfaceOSMesa::~GLSurfaceOSMesa() {
}
void GLSurfaceOSMesa::Resize(const gfx::Size& new_size) {
if (new_size == size_)
return;
// Allocate a new back buffer.
scoped_array<int32> new_buffer(new int32[new_size.GetArea()]);
memset(new_buffer.get(), 0, new_size.GetArea() * sizeof(new_buffer[0]));
// Copy the current back buffer into the new buffer.
int copy_width = std::min(size_.width(), new_size.width());
int copy_height = std::min(size_.height(), new_size.height());
for (int y = 0; y < copy_height; ++y) {
for (int x = 0; x < copy_width; ++x) {
new_buffer[y * new_size.width() + x] = buffer_[y * size_.width() + x];
}
}
buffer_.reset(new_buffer.release());
size_ = new_size;
}
bool GLSurfaceOSMesa::Initialize() {
return true;
}
void GLSurfaceOSMesa::Destroy() {
buffer_.reset();
size_ = gfx::Size();
}
bool GLSurfaceOSMesa::IsOffscreen() {
return true;
}
bool GLSurfaceOSMesa::SwapBuffers() {
NOTREACHED() << "Should not call SwapBuffers on an GLSurfaceOSMesa.";
return false;
}
gfx::Size GLSurfaceOSMesa::GetSize() {
return size_;
}
void* GLSurfaceOSMesa::GetHandle() {
return buffer_.get();
}
} // namespace gfx
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