Ozone support for multiprocess graphics.

ui/ozone/platform/drm/gpu/vgem_pixmap.cc

+// Copyright 2015 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/ozone/platform/drm/gpu/vgem_pixmap.h"
+
+#include <i915_drm.h>
+#include "base/logging.h"
+#include "ui/ozone/platform/drm/gpu/drm_device.h"
+#include "ui/ozone/platform/drm/gpu/drm_window.h"
+
+namespace ui {
+
+namespace {
+void EmptyPageFlipCallback(gfx::SwapResult result) {}
+}  // namespace
+
+VgemPixmap::VgemPixmap(const scoped_refptr<DrmDevice>& drm) : drm_(drm) {}
+
+VgemPixmap::~VgemPixmap() {
+  // TODO: finish
+  if (framebuffer_ && !drm_->RemoveFramebuffer(framebuffer_))
+    PLOG(ERROR) << "SharedBuffer: RemoveFramebuffer: fb " << framebuffer_;
+}
+
+bool VgemPixmap::Initialize(base::ScopedFD dma_buf,
+                            int width,
+                            int height,
+                            uint32_t pitch) {
+  int fd = dma_buf.get();
+  if (!drm_->BufferFdToHandle(fd, &handle_)) {
+    PLOG(ERROR) << "SharedBuffer: Initialize: couldn't get handle from fd "
+                << fd;
+    return false;
+  }
+
+  // For scanout
+  if (!drm_->BufferHandleSetTiling(handle_, pitch, I915_TILING_X))
+    return false;
+
+  dma_buf_ = dma_buf.Pass();
+  dma_buf_pitch_ = pitch;
+
+  width_ = width;
+  height_ = height;
+
+  if (!drm_->AddFramebuffer(width_, height_, 24, 32, dma_buf_pitch_, handle_,
+                            &framebuffer_)) {
+    PLOG(ERROR) << "SharedBuffer: AddFramebuffer: handle " << handle_;
+    return false;
+  }
+
+  return true;
+}
+
+uint32_t VgemPixmap::GetHandle() const {
+  return handle_;
+}
+
+gfx::Size VgemPixmap::GetSize() const {
+  return gfx::Size(width_, height_);
+}
+
+uint32_t VgemPixmap::GetFramebufferId() const {
+  return framebuffer_;
+}
+
+int VgemPixmap::GetDmaBufFd() const {
+  return dma_buf_.get();
+}
+
+int VgemPixmap::GetDmaBufPitch() const {
+  return dma_buf_pitch_;
+}
+
+VgemPixmapWrapper::VgemPixmapWrapper(ScreenManager* screen_manager,
+                                     const scoped_refptr<VgemPixmap>& pixmap)
+    : pixmap_(pixmap), screen_manager_(screen_manager) {}
+
+VgemPixmapWrapper::~VgemPixmapWrapper() {}
+
+bool VgemPixmapWrapper::ScheduleOverlayPlane(
+    gfx::AcceleratedWidget widget,
+    int plane_z_order,
+    gfx::OverlayTransform plane_transform,
+    const gfx::Rect& display_bounds,
+    const gfx::RectF& crop_rect) {
+  screen_manager_->GetWindow(widget)->QueueOverlayPlane(OverlayPlane(pixmap_));
+  // TODO(cstout): for the multi-overlay case, SchedulePageFlip should be called
+  // once after all overlay planes are scheduled.  Tracking issue mojo #540.
+  screen_manager_->GetWindow(widget)->SchedulePageFlip(
+      true /* is_sync */, base::Bind(&EmptyPageFlipCallback));
+  return true;
+}
+
+int VgemPixmapWrapper::GetDmaBufFd() {
+  return pixmap_->GetDmaBufFd();
+}
+
+int VgemPixmapWrapper::GetDmaBufPitch() {
+  return pixmap_->GetDmaBufPitch();
+}
+
+void* VgemPixmapWrapper::GetEGLClientBuffer() {
+  return nullptr;
+}
+
+}  // namespace ui