src/ui/ozone/platform/dri/dri_surface.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/ozone/platform/dri/dri_surface.h"
   6
   7 #include <errno.h>
   8 #include <sys/mman.h>
   9 #include <sys/types.h>
  10 #include <xf86drm.h>
  11
  12 #include "base/logging.h"
  13 #include "third_party/skia/include/core/SkCanvas.h"
  14 #include "ui/gfx/geometry/rect.h"
  15 #include "ui/gfx/skia_util.h"
  16 #include "ui/ozone/platform/dri/dri_buffer.h"
  17 #include "ui/ozone/platform/dri/dri_wrapper.h"
  18
  19 namespace ui {
  20
  21 DriSurface::DriSurface(
  22     DriWrapper* dri, const gfx::Size& size)
  23     : dri_(dri),
  24       bitmaps_(),
  25       front_buffer_(0),
  26       size_(size) {
  27 }
  28
  29 DriSurface::~DriSurface() {
  30 }
  31
  32 bool DriSurface::Initialize() {
  33   for (size_t i = 0; i < arraysize(bitmaps_); ++i) {
  34     bitmaps_[i].reset(CreateBuffer());
  35     // TODO(dnicoara) Should select the configuration based on what the
  36     // underlying system supports.
  37     SkImageInfo info = SkImageInfo::Make(size_.width(),
  38                                          size_.height(),
  39                                          kPMColor_SkColorType,
  40                                          kPremul_SkAlphaType);
  41     if (!bitmaps_[i]->Initialize(info)) {
  42       return false;
  43     }
  44   }
  45
  46   return true;
  47 }
  48
  49 uint32_t DriSurface::GetFramebufferId() const {
  50   CHECK(backbuffer());
  51   return backbuffer()->framebuffer();
  52 }
  53
  54 uint32_t DriSurface::GetHandle() const {
  55   CHECK(backbuffer());
  56   return backbuffer()->handle();
  57 }
  58
  59 // This call is made after the hardware just started displaying our back buffer.
  60 // We need to update our pointer reference and synchronize the two buffers.
  61 void DriSurface::SwapBuffers() {
  62   CHECK(frontbuffer());
  63   CHECK(backbuffer());
  64
  65   // Update our front buffer pointer.
  66   front_buffer_ ^= 1;
  67 }
  68
  69 SkCanvas* DriSurface::GetDrawableForWidget() {
  70   CHECK(backbuffer());
  71   return backbuffer()->canvas();
  72 }
  73
  74 DriBuffer* DriSurface::CreateBuffer() { return new DriBuffer(dri_); }
  75
  76 }  // namespace ui