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      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 gfx::Size DriSurface::Size() const {
     70   return size_;
     71 }
     72 
     73 SkCanvas* DriSurface::GetDrawableForWidget() {
     74   CHECK(backbuffer());
     75   return backbuffer()->canvas();
     76 }
     77 
     78 DriBuffer* DriSurface::CreateBuffer() { return new DriBuffer(dri_); }
     79 
     80 }  // namespace ui
     81