Move GLSurfaceOSMesaX11 into it's own source file.

ui/gl/gl_surface_osmesa_x11.cc

+// Copyright 2016 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_surface_osmesa_x11.h"
+
+#include <stdint.h>
+
+#include "base/logging.h"
+#include "base/message_loop/message_loop.h"
+#include "base/trace_event/trace_event.h"
+#include "ui/gfx/x/x11_types.h"
+#include "ui/gl/gl_bindings.h"
+#include "ui/gl/gl_implementation.h"
+
+namespace gl {
+
+GLSurfaceOSMesaX11::GLSurfaceOSMesaX11(gfx::AcceleratedWidget window)
+    : GLSurfaceOSMesa(SURFACE_OSMESA_BGRA, gfx::Size(1, 1)),
+      xdisplay_(gfx::GetXDisplay()),
+      window_graphics_context_(0),
+      window_(window),
+      pixmap_graphics_context_(0),
+      pixmap_(0) {
+  DCHECK(xdisplay_);
+  DCHECK(window_);
+}
+
+// static
+bool GLSurfaceOSMesaX11::InitializeOneOff() {
+  static bool initialized = false;
+  if (initialized)
+    return true;
+
+  if (!gfx::GetXDisplay()) {
+    LOG(ERROR) << "XOpenDisplay failed.";
+    return false;
+  }
+
+  initialized = true;
+  return true;
+}
+
+bool GLSurfaceOSMesaX11::Initialize(GLSurface::Format format) {
+  if (!GLSurfaceOSMesa::Initialize(format))
+    return false;
+
+  window_graphics_context_ = XCreateGC(xdisplay_, window_, 0, NULL);
+  if (!window_graphics_context_) {
+    LOG(ERROR) << "XCreateGC failed.";
+    Destroy();
+    return false;
+  }
+
+  return true;
+}
+
+void GLSurfaceOSMesaX11::Destroy() {
+  if (pixmap_graphics_context_) {
+    XFreeGC(xdisplay_, pixmap_graphics_context_);
+    pixmap_graphics_context_ = NULL;
+  }
+
+  if (pixmap_) {
+    XFreePixmap(xdisplay_, pixmap_);
+    pixmap_ = 0;
+  }
+
+  if (window_graphics_context_) {
+    XFreeGC(xdisplay_, window_graphics_context_);
+    window_graphics_context_ = NULL;
+  }
+
+  XSync(xdisplay_, False);
+}
+
+bool GLSurfaceOSMesaX11::Resize(const gfx::Size& new_size,
+                                float scale_factor,
+                                bool alpha) {
+  if (!GLSurfaceOSMesa::Resize(new_size, scale_factor, alpha))
+    return false;
+
+  XWindowAttributes attributes;
+  if (!XGetWindowAttributes(xdisplay_, window_, &attributes)) {
+    LOG(ERROR) << "XGetWindowAttributes failed for window " << window_ << ".";
+    return false;
+  }
+
+  // Destroy the previous pixmap and graphics context.
+  if (pixmap_graphics_context_) {
+    XFreeGC(xdisplay_, pixmap_graphics_context_);
+    pixmap_graphics_context_ = NULL;
+  }
+  if (pixmap_) {
+    XFreePixmap(xdisplay_, pixmap_);
+    pixmap_ = 0;
+  }
+
+  // Recreate a pixmap to hold the frame.
+  pixmap_ = XCreatePixmap(xdisplay_, window_, new_size.width(),
+                          new_size.height(), attributes.depth);
+  if (!pixmap_) {
+    LOG(ERROR) << "XCreatePixmap failed.";
+    return false;
+  }
+
+  // Recreate a graphics context for the pixmap.
+  pixmap_graphics_context_ = XCreateGC(xdisplay_, pixmap_, 0, NULL);
+  if (!pixmap_graphics_context_) {
+    LOG(ERROR) << "XCreateGC failed";
+    return false;
+  }
+
+  return true;
+}
+
+bool GLSurfaceOSMesaX11::IsOffscreen() {
+  return false;
+}
+
+gfx::SwapResult GLSurfaceOSMesaX11::SwapBuffers() {
+  TRACE_EVENT2("gpu", "GLSurfaceOSMesaX11:RealSwapBuffers", "width",
+               GetSize().width(), "height", GetSize().height());
+
+  gfx::Size size = GetSize();
+
+  XWindowAttributes attributes;
+  if (!XGetWindowAttributes(xdisplay_, window_, &attributes)) {
+    LOG(ERROR) << "XGetWindowAttributes failed for window " << window_ << ".";
+    return gfx::SwapResult::SWAP_FAILED;
+  }
+
+  // Copy the frame into the pixmap.
+  gfx::PutARGBImage(xdisplay_, attributes.visual, attributes.depth, pixmap_,
+                    pixmap_graphics_context_,
+                    static_cast<const uint8_t*>(GetHandle()), size.width(),
+                    size.height());
+
+  // Copy the pixmap to the window.
+  XCopyArea(xdisplay_, pixmap_, window_, window_graphics_context_, 0, 0,
+            size.width(), size.height(), 0, 0);
+
+  return gfx::SwapResult::SWAP_ACK;
+}
+
+bool GLSurfaceOSMesaX11::SupportsPostSubBuffer() {
+  return true;
+}
+
+gfx::SwapResult GLSurfaceOSMesaX11::PostSubBuffer(int x,
+                                                  int y,
+                                                  int width,
+                                                  int height) {
+  gfx::Size size = GetSize();
+
+  // Move (0,0) from lower-left to upper-left
+  y = size.height() - y - height;
+
+  XWindowAttributes attributes;
+  if (!XGetWindowAttributes(xdisplay_, window_, &attributes)) {
+    LOG(ERROR) << "XGetWindowAttributes failed for window " << window_ << ".";
+    return gfx::SwapResult::SWAP_FAILED;
+  }
+
+  // Copy the frame into the pixmap.
+  gfx::PutARGBImage(xdisplay_, attributes.visual, attributes.depth, pixmap_,
+                    pixmap_graphics_context_,
+                    static_cast<const uint8_t*>(GetHandle()), size.width(),
+                    size.height(), x, y, x, y, width, height);
+
+  // Copy the pixmap to the window.
+  XCopyArea(xdisplay_, pixmap_, window_, window_graphics_context_, x, y, width,
+            height, x, y);
+
+  return gfx::SwapResult::SWAP_ACK;
+}
+
+GLSurfaceOSMesaX11::~GLSurfaceOSMesaX11() {
+  Destroy();
+}
+
+}  // namespace gl