/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "RenderCompositor.h"

#include "gfxConfig.h"
#include "gfxPlatform.h"
#include "GLContext.h"
#include "mozilla/StaticPrefs_gfx.h"
#include "mozilla/gfx/Logging.h"
#include "mozilla/gfx/gfxVars.h"
#include "mozilla/layers/SyncObject.h"
#include "mozilla/webrender/RenderCompositorLayersSWGL.h"
#include "mozilla/webrender/RenderCompositorOGL.h"
#include "mozilla/webrender/RenderCompositorSWGL.h"
#include "mozilla/widget/CompositorWidget.h"

#ifdef XP_WIN
#  include "mozilla/webrender/RenderCompositorANGLE.h"
#  include "mozilla/widget/WinCompositorWidget.h"
#endif

#if defined(MOZ_WIDGET_ANDROID) || defined(MOZ_WAYLAND) || defined(MOZ_X11)
#  include "mozilla/webrender/RenderCompositorEGL.h"
#endif

#ifdef MOZ_WAYLAND
#  include "mozilla/webrender/RenderCompositorNative.h"
#endif

#ifdef XP_MACOSX
#  include "mozilla/webrender/RenderCompositorNative.h"
#endif

namespace mozilla::wr {

void wr_compositor_add_surface(void* aCompositor, wr::NativeSurfaceId aId,
                               const wr::CompositorSurfaceTransform* aTransform,
                               wr::DeviceIntRect aClipRect,
                               wr::ImageRendering aImageRendering) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->AddSurface(aId, *aTransform, aClipRect, aImageRendering);
}

void wr_compositor_begin_frame(void* aCompositor) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->CompositorBeginFrame();
}

void wr_compositor_bind(void* aCompositor, wr::NativeTileId aId,
                        wr::DeviceIntPoint* aOffset, uint32_t* aFboId,
                        wr::DeviceIntRect aDirtyRect,
                        wr::DeviceIntRect aValidRect) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->Bind(aId, aOffset, aFboId, aDirtyRect, aValidRect);
}

void wr_compositor_create_surface(void* aCompositor, wr::NativeSurfaceId aId,
                                  wr::DeviceIntPoint aVirtualOffset,
                                  wr::DeviceIntSize aTileSize, bool aIsOpaque) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->CreateSurface(aId, aVirtualOffset, aTileSize, aIsOpaque);
}

void wr_compositor_create_external_surface(void* aCompositor,
                                           wr::NativeSurfaceId aId,
                                           bool aIsOpaque) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->CreateExternalSurface(aId, aIsOpaque);
}

void wr_compositor_create_backdrop_surface(void* aCompositor,
                                           wr::NativeSurfaceId aId,
                                           wr::ColorF aColor) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->CreateBackdropSurface(aId, aColor);
}

void wr_compositor_create_tile(void* aCompositor, wr::NativeSurfaceId aId,
                               int32_t aX, int32_t aY) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->CreateTile(aId, aX, aY);
}

void wr_compositor_destroy_tile(void* aCompositor, wr::NativeSurfaceId aId,
                                int32_t aX, int32_t aY) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->DestroyTile(aId, aX, aY);
}

void wr_compositor_destroy_surface(void* aCompositor, NativeSurfaceId aId) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->DestroySurface(aId);
}

void wr_compositor_attach_external_image(void* aCompositor,
                                         wr::NativeSurfaceId aId,
                                         wr::ExternalImageId aExternalImage) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->AttachExternalImage(aId, aExternalImage);
}

void wr_compositor_start_compositing(void* aCompositor, wr::ColorF aClearColor,
                                     const wr::DeviceIntRect* aDirtyRects,
                                     size_t aNumDirtyRects,
                                     const wr::DeviceIntRect* aOpaqueRects,
                                     size_t aNumOpaqueRects) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->StartCompositing(aClearColor, aDirtyRects, aNumDirtyRects,
                               aOpaqueRects, aNumOpaqueRects);
}

void wr_compositor_end_frame(void* aCompositor) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->CompositorEndFrame();
}

void wr_compositor_enable_native_compositor(void* aCompositor, bool aEnable) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->EnableNativeCompositor(aEnable);
}

void wr_compositor_get_capabilities(void* aCompositor,
                                    CompositorCapabilities* aCaps) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->GetCompositorCapabilities(aCaps);
}

void wr_compositor_get_window_visibility(void* aCompositor,
                                         WindowVisibility* aVisibility) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->GetWindowVisibility(aVisibility);
}

void wr_compositor_unbind(void* aCompositor) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->Unbind();
}

void wr_compositor_deinit(void* aCompositor) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->DeInit();
}

void wr_compositor_map_tile(void* aCompositor, wr::NativeTileId aId,
                            wr::DeviceIntRect aDirtyRect,
                            wr::DeviceIntRect aValidRect, void** aData,
                            int32_t* aStride) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->MapTile(aId, aDirtyRect, aValidRect, aData, aStride);
}

void wr_compositor_unmap_tile(void* aCompositor) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->UnmapTile();
}

void wr_partial_present_compositor_set_buffer_damage_region(
    void* aCompositor, const wr::DeviceIntRect* aRects, size_t aNRects) {
  RenderCompositor* compositor = static_cast<RenderCompositor*>(aCompositor);
  compositor->SetBufferDamageRegion(aRects, aNRects);
}

/* static */
UniquePtr<RenderCompositor> RenderCompositor::Create(
    const RefPtr<widget::CompositorWidget>& aWidget, nsACString& aError) {
  if (aWidget->GetCompositorOptions().UseSoftwareWebRender()) {
#ifdef XP_MACOSX
    // Mac uses NativeLayerCA
    if (!gfxPlatform::IsHeadless()) {
      return RenderCompositorNativeSWGL::Create(aWidget, aError);
    }
#elif defined(MOZ_WAYLAND)
    if (gfx::gfxVars::UseWebRenderCompositor()) {
      return RenderCompositorNativeSWGL::Create(aWidget, aError);
    }
#endif
    UniquePtr<RenderCompositor> comp =
        RenderCompositorLayersSWGL::Create(aWidget, aError);
    if (comp) {
      return comp;
    }
#if defined(MOZ_WIDGET_ANDROID)
    // On Android, we do not want to fallback from RenderCompositorOGLSWGL to
    // RenderCompositorSWGL.
    if (aWidget->GetCompositorOptions().AllowSoftwareWebRenderOGL()) {
      return nullptr;
    }
#endif
    return RenderCompositorSWGL::Create(aWidget, aError);
  }

#ifdef XP_WIN
  if (gfx::gfxVars::UseWebRenderANGLE()) {
    return RenderCompositorANGLE::Create(aWidget, aError);
  }
#endif

#if defined(MOZ_WAYLAND)
  if (gfx::gfxVars::UseWebRenderCompositor()) {
    return RenderCompositorNativeOGL::Create(aWidget, aError);
  }
#endif

#if defined(MOZ_WIDGET_ANDROID) || defined(MOZ_WAYLAND) || defined(MOZ_X11)
  UniquePtr<RenderCompositor> eglCompositor =
      RenderCompositorEGL::Create(aWidget, aError);
  if (eglCompositor) {
    return eglCompositor;
  }
#endif

#if defined(MOZ_WIDGET_ANDROID)
  // RenderCompositorOGL is not used on android
  return nullptr;
#elif defined(XP_MACOSX)
  // Mac uses NativeLayerCA
  return RenderCompositorNativeOGL::Create(aWidget, aError);
#else
  return RenderCompositorOGL::Create(aWidget, aError);
#endif
}

RenderCompositor::RenderCompositor(
    const RefPtr<widget::CompositorWidget>& aWidget)
    : mWidget(aWidget) {}

RenderCompositor::~RenderCompositor() = default;

bool RenderCompositor::MakeCurrent() { return gl()->MakeCurrent(); }

void RenderCompositor::GetCompositorCapabilities(
    CompositorCapabilities* aCaps) {
  if (StaticPrefs::gfx_webrender_compositor_max_update_rects_AtStartup() > 0) {
    aCaps->max_update_rects = 1;
  } else {
    aCaps->max_update_rects = 0;
  }
}

void RenderCompositor::GetWindowVisibility(WindowVisibility* aVisibility) {
#ifdef XP_WIN
  auto* widget = mWidget->AsWindows();
  if (!widget) {
    return;
  }
  aVisibility->size_mode = ToWrWindowSizeMode(widget->GetWindowSizeMode());
  aVisibility->is_fully_occluded = widget->GetWindowIsFullyOccluded();
#endif
}

GLenum RenderCompositor::IsContextLost(bool aForce) {
  auto* glc = gl();
  // GetGraphicsResetStatus may trigger an implicit MakeCurrent if robustness
  // is not supported, so unless we are forcing, pass on the check.
  if (!glc || (!aForce && !glc->IsSupported(gl::GLFeature::robustness))) {
    return LOCAL_GL_NO_ERROR;
  }
  auto resetStatus = glc->fGetGraphicsResetStatus();
  switch (resetStatus) {
    case LOCAL_GL_NO_ERROR:
      break;
    case LOCAL_GL_INNOCENT_CONTEXT_RESET_ARB:
      NS_WARNING("Device reset due to system / different context");
      break;
    case LOCAL_GL_PURGED_CONTEXT_RESET_NV:
      NS_WARNING("Device reset due to NV video memory purged");
      break;
    case LOCAL_GL_GUILTY_CONTEXT_RESET_ARB:
      gfxCriticalError() << "Device reset due to WR context";
      break;
    case LOCAL_GL_UNKNOWN_CONTEXT_RESET_ARB:
      gfxCriticalNote << "Device reset may be due to WR context";
      break;
    default:
      gfxCriticalError() << "Device reset with WR context unexpected status: "
                         << gfx::hexa(resetStatus);
      break;
  }
  return resetStatus;
}

}  // namespace mozilla::wr