ui: Move gl/ directory out of gfx/, up to ui/.

BUG=104040
R=ben@chromium.org
TBR=tony@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10392068

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@136777 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 82 insertions, 0 deletions

diff --git a/ui/gl/gl_surface_osmesa.cc b/ui/gl/gl_surface_osmesa.cc
new file mode 100644
index 0000000..a1fd360
--- /dev/null
+++ b/ui/gl/gl_surface_osmesa.cc
@@ -0,0 +1,82 @@
+// 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 "base/logging.h"
+#include "ui/gl/gl_bindings.h"
+#include "ui/gl/gl_context.h"
+#include "ui/gl/gl_surface_osmesa.h"
+
+namespace gfx {
+
+GLSurfaceOSMesa::GLSurfaceOSMesa(unsigned format, const gfx::Size& size)
+    : format_(format),
+      size_(size) {
+}
+
+bool GLSurfaceOSMesa::Initialize() {
+  return Resize(size_);
+}
+
+void GLSurfaceOSMesa::Destroy() {
+  buffer_.reset();
+}
+
+bool GLSurfaceOSMesa::Resize(const gfx::Size& new_size) {
+  GLContext* current_context = GLContext::GetCurrent();
+  bool was_current = current_context && current_context->IsCurrent(this);
+  if (was_current)
+    current_context->ReleaseCurrent(this);
+
+  // Preserve the old buffer.
+  scoped_array<int32> old_buffer(buffer_.release());
+
+  // Allocate a new one.
+  buffer_.reset(new int32[new_size.GetArea()]);
+  memset(buffer_.get(), 0, new_size.GetArea() * sizeof(buffer_[0]));
+
+  // Copy the old back buffer into the new buffer.
+  if (old_buffer.get()) {
+    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) {
+        buffer_[y * new_size.width() + x] = old_buffer[y * size_.width() + x];
+      }
+    }
+  }
+
+  size_ = new_size;
+
+  if (was_current)
+    return current_context->MakeCurrent(this);
+
+  return true;
+}
+
+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();
+}
+
+unsigned GLSurfaceOSMesa::GetFormat() {
+  return format_;
+}
+
+GLSurfaceOSMesa::~GLSurfaceOSMesa() {
+  Destroy();
+}
+
+}  // namespace gfx